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JPH09130896

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DESCRIPTION JPH09130896
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
apparatus for determining the speaker polarity of an audio apparatus for detecting an
abnormality in the polarity of a speaker due to a defective wiring of the speaker provided in a
closed space such as a car room.
[0002]
2. Description of the Related Art Conventionally, when connecting an amplifier and a speaker of
an audio device provided in a vehicle compartment, it is necessary to correctly connect +
(positive electrode) and-(negative electrode) with a designated polarity, In this case, if the polarity
is incorrect, the phase of the output sound from the speaker is reversed, and the sound quality is
significantly reduced.
[0003]
Therefore, in order to determine whether or not the connection between the amplifier and the
speaker is normal, a speaker polarity determination device as described below is considered.
[0004]
In such a conventional speaker polarity determination device, a large-scale system using an audio
analyzer consisting of a personal computer and an analyzer is used, and the audio analyzer
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1
determines the polarity of a speaker provided in the vehicle compartment. A signal generating
circuit is incorporated which generates a reference audio signal having a rectangular wave.
Note that, as shown in FIG. 3A, the reference audio signal is usually a silence signal
corresponding to an interval period of, for example, 30 msec and a voiced speech signal
corresponding to a short wave period of, for example, 20 msec. It is a signal that takes one cycle
as a signal.
[0005]
In the said speaker polarity determination apparatus, while approaching a microphone to the
speaker in the said vehicle interior, the said audio analyzer is installed in the said vehicle exterior.
The audio analyzer in the vehicle cabin and the microphone are connected to the audio analyzer.
[0006]
According to the speaker polarity determination device, the reference audio signal is output as
voice from the signal generation circuit of the audio analyzer via the audio device and the
speaker, and the reference audio signal output as audio from the speaker is collected by the
microphone. Sounds and supplies the collected reference audio signal to the audio analyzer.
[0007]
The audio analyzer analyzes the collected reference audio signal, detects a voiced signal from the
reference voice signal, and detects rising and falling signals in the detected voiced signal of the
speaker. The polarity determination is performed, and the polarity determination result is
displayed on the display screen of the personal computer.
[0008]
Therefore, according to the speaker polarity determination device, even if the polarity is incorrect
due to a connection error between the speaker and the amplifier provided in the vehicle
compartment, the user can easily make an error of the speaker polarity on the display screen of
the personal computer. It can be recognized.
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2
[0009]
Further, since the reference audio signal output from the speaker provided in the vehicle
compartment is generated by the signal generation circuit in the device, it is easy to synchronize
the reference audio signal with the device. .
[0010]
However, according to the above-mentioned conventional speaker polarity determination
apparatus for audio devices, the manufacturing cost is very high because of the large system
configuration consisting of audio analyzers such as personal computers and analyzers. In
addition, there is a first problem that the operation efficiency is not very good in terms of loading
and unloading.
[0011]
Further, focusing on such a first problem, a portable speaker polarity determination device as
shown in FIG. 1 which is low in cost and excellent in workability can be considered.
[0012]
According to such a portable type of speaker polarity determination device, it is difficult to
incorporate a signal generation circuit for generating a reference audio signal along with its cost
reduction and miniaturization, and therefore, a commercially available disk for a standard audio
signal It is conceivable to obtain the reference audio signal by reproducing the audio signal by
the audio device in the vehicle compartment.
In the apparatus for determining the polarity of the speaker comprising the audio analyzer, since
the signal generation circuit for generating the reference audio signal is built in, synchronization
can be easily achieved.
[0013]
However, according to the portable speaker polarity determination device, the audio device as an
external sound source reproduces a commercially available reference audio signal disk, and the
voiced signal in the reference audio signal necessary for polarity determination of the speaker is
It is very difficult to synchronize with the reference audio signal obtained from the commercially
available reference audio signal disc when detecting the rising and falling signals in the above,
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and the timing is shifted and the rising signal in the voice signal or There is a second problem
that a falling signal is erroneously detected.
[0014]
Further, according to the speaker polarity determination device including the audio analyzer, the
polarity determination result is displayed in the interval period of the reference audio signal on
the display screen of the personal computer displaying the polarity determination result. When
the interval period is short, there is a third problem that it is difficult for the user to confirm the
polarity determination result on the display screen.
[0015]
The present invention has been made in view of the above first and second problems, and the
first object of the present invention is that even if a reference audio signal which is not
synchronized with the device at all is used, It is an object of the present invention to provide a
speaker polarity determination device of an audio apparatus which can accurately detect rising
and falling signals from a voiced signal in a reference audio signal and which is low in cost and
excellent in workability.
[0016]
The present invention has been made in view of the above third problem, and the second object
of the present invention is to determine the speaker polarity of the audio apparatus which can
significantly improve the checkability of the polarity determination result. It is in providing an
apparatus.
[0017]
According to a first aspect of the present invention, there is provided a speaker polarity
determining device for an audio device according to the first aspect of the present invention,
which is output from an external sound source through a speaker for a predetermined time.
Sound collecting means for collecting a reference sound signal having one cycle of a silence
signal and a sound signal shorter than the predetermined time following the sound silence signal,
and sound presence in the collected reference sound signal Fall detection means for detecting a
fall signal from the signal, rise detection means for detecting a rise signal from the voiced signal
in the collected reference audio signal, and detection by the rise detection means and the fall
detection means A rising edge detecting means and a falling edge detecting means for detecting
the rising edge or the falling edge by the polarity determining means for determining the polarity
of the speaker based on the received signal, and within the predetermined time When the rising
signal or the falling signal is not detected, and the rising signal or the falling signal is detected
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after the predetermined time has elapsed, the polarity determination unit is used to determine
the polarity of the speaker based on the detected rising signal or falling signal. And control
means for determining the polarity.
[0018]
The external sound source and the speaker are, for example, an audio device and a speaker
provided in a vehicle compartment, and a standard audio signal that is output from the external
sound source by the speaker is a commercially available standard reproduced by the external
sound source. It can be obtained with an audio signal disc.
The rising and falling signals correspond to falling and falling signals in a rectangular wave
signal which is a voiced signal in the reference audio signal.
[0019]
Therefore, according to the speaker polarity determination device of the audio device in the first
invention, the rise detection means and the fall detection means detect the rising signal or the
falling signal, and within the predetermined time, that is, the silence signal. If the rising signal or
falling signal is not detected within a time corresponding to the interval period and the rising
signal or falling signal is detected after the predetermined time has elapsed, the detected rising
signal or falling signal is detected. Since the polarity determination means is made to determine
the polarity of the speaker based on this, even if it is a reference audio signal obtained by
reproducing a commercially available reference audio signal disc with an audio device which is
an external sound source, When a voiced signal in a reference audio signal necessary for
determining the polarity of a speaker is detected, the disc for reference audio signal on the
market is False detection in the rising signal and falling signal in the voiced signal can be reliably
prevented by matching the timing with the reference audio signal obtained from Can.
[0020]
In addition, according to the speaker polarity determination device, as described above, it is
possible to cope with a reference audio signal which is not synchronized with the device at all,
that is, a reference audio signal obtained by a commercially available reference audio signal disc.
There is no need to use a large-scale system such as an audio analyzer that incorporates a
conventional signal generation circuit, and the device body can be made compact, so a speaker
polarity determination device with low cost and excellent workability can be obtained. Can be
provided.
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[0021]
Furthermore, in order to achieve the first and second objects, the speaker polarity determination
device of the audio device in the second invention of the present invention is added to the
configuration of the speaker polarity determination device of the audio device in the first
invention. The control means may cause the display means to display the result of the
determination of the speaker polarity determined by the polarity determination means.
[0022]
Therefore, according to the speaker polarity determination device of the audio device in the
second aspect of the invention, since the polarity determination result is displayed on the display
means, the user can easily recognize the content.
[0023]
Further, according to the speaker polarity determination device for an audio device in the third
invention of the present invention in order to achieve the third object, in addition to the
configuration of the speaker polarity determination device for an audio device in the second
invention, The control means causes the display means to continuously display the polarity
determination result for at least a time period equivalent to one cycle of the reference audio
signal.
[0024]
Here, the time corresponding to one cycle of the reference audio signal means that from the
generation of a silence signal for a predetermined time, a voiced signal for a shorter time than
the predetermined time is generated following the silence signal, and the next silence signal is It
is time to occur.
[0025]
Therefore, according to the speaker polarity determination device of the audio device in the third
aspect of the invention, the display means displays the result of the polarity determination at
least for a time equivalent to one cycle of the reference audio signal. By lengthening the display
of the polarity determination result in comparison with the above, the user can reliably recognize
the polarity determination result.
[0026]
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BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a speaker polarity judging
device of an audio device according to the present invention will be described below based on the
drawings.
FIG. 1 is a perspective view showing an embodiment of a speaker polarity determination device
of an audio device according to the present invention.
[0027]
In FIG. 1, the speaker polarity determination device 1 is a device which is extremely small and
excellent in portability as compared with the system described in the prior art, and the
microphone 2 integrated with the device main body at the upper end thereof is A connection
portion (not shown) connectable to the external microphone 3 is provided in the vicinity thereof.
[0028]
The upper part of the speaker polarity determination device 1 includes an operation unit 4 for
inputting various commands related to the device, an LED 5 for lighting the operation states of
various function modes to be described later, the function mode and the like. And a display unit 6
for displaying and outputting various data obtained.
[0029]
The internal configuration of the speaker polarity determination device 1 will now be described.
FIG. 2 is a block diagram showing a schematic configuration inside the speaker polarity
determination device 1.
[0030]
In FIG. 2, the speaker polarity determination device 1 includes the microphone 2 that picks up an
audio signal such as a sweep signal or a test signal output from the speaker of the audio device in
the vehicle compartment, and the microphone 2 An A / D converter 7 for digital conversion of an
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audio signal, a digital signal processor (hereinafter simply referred to as DSP) 8 for performing
signal processing on the audio signal subjected to digital conversion, the operation unit 4 and
display unit described above 6 and an LED 5, a memory 9 such as an E2PROM for storing data
obtained by the DSP 8, and a microcomputer 10 for controlling the entire gain measuring device
1.
The input signal to the A / D converter 7 may be an audio signal collected by the external
microphone 3 in addition to the audio signal collected by the microphone 2. Nor.
[0031]
The display unit 6 is a display microcomputer 6a that controls the entire display unit 6 based on
display data from the microcomputer 10, an LCD 6b that displays the data contents, and the
control from the display microcomputer 6a. And a driver 6c for driving and controlling the LCD
6b.
[0032]
The operation unit 4 further includes an execution key 4a for specifying, activating or
terminating various function modes, and a memory key 4b for storing data obtained in the
function mode in the memory 9.
[0033]
The microcomputer 10 has a timer function, and an internal memory 10a is provided therein.
Further, it is assumed that the DSP 8 has an internal memory 8b provided therein.
[0034]
Further, the speaker polarity determination device 1 has an automatic power-off function of
setting a set time for each function and automatically turning off the power of the gain
measurement device after the set time has elapsed, and the setting described above It has a
function capable of selecting the time according to the predetermined operation on the user side.
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[0035]
Next, the operation of the speaker polarity determination device 1 will be described based on
FIGS. 3 to 6.
FIG. 3 is an explanatory diagram concerning a general reference speech signal.
[0036]
For example, as shown in FIG. 3A, the reference audio signal of a commercially available
reference audio signal disc reproduced by an audio apparatus in the vehicle compartment has an
interval period corresponding to a 30 msec silent signal, a rising signal and a falling signal. A
total of 50 msec consisting of a short wave period corresponding to a 20 msec signal including a
signal is regarded as one cycle, and by repeating the cycle, rising and falling signals in the signal
are obtained at predetermined intervals. It is
[0037]
The operation of the speaker polarity determination function will now be described.
FIG. 4 is a flowchart showing the processing operation of the microcomputer 10 in the phase
measurement display process of the speaker polarity determination function.
FIG. 5 is a flowchart showing the processing operation of the DSP 8 in the phase measurement
processing of the speaker polarity determination function.
[0038]
The phase measurement display process is performed by causing the DSP 8 to execute the phase
measurement process and causing the display unit 6 to display the polarity determination result.
In the phase measurement process, a commercially available reference audio signal disc is
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reproduced by an audio device in the vehicle compartment, and the reference audio signal is
output from the speaker as voice and the microphone 2 of the device is brought close to the
speaker. The processing operation is started.
[0039]
In FIG. 4, the microcomputer 10 determines whether or not the execution key 4a for activating
the speaker polarity determination function is pressed (step S11).
If the execution key 4a is pressed, a program for executing the phase measurement process of
FIG. 5 to be described later is transmitted to the DSP 8 (step S12), and a polarity measurement
timer is set (step S13). It is determined whether 1 sec which is the set value of the timer for timer
has elapsed (step S14).
If the 1 sec has elapsed, the DSP 8 is requested for polar measurement result data (hereinafter,
simply referred to as measurement data) which is a measurement result of phase measurement
processing to be described later (step S15). The measurement data as shown in FIG. 3 (b) or 3 (c)
obtained from is taken in (step S16), and the polarity of the concerned speaker is in phase based
on the taken-in measurement data, that is, the wiring of the speaker is normal. It is determined
whether there is any (step S17).
If the wiring of the speaker is normal, the normal display as shown in FIG. 6A is displayed on the
LCD 6b of the display unit 6 (step S18), and it is determined whether the execution key 4a is
pressed ( Step S19).
The normal display in step S18 not only displays the "+" mark 50b indicating normal (in phase)
as shown in FIG. 6A, but also the wiring mark 50c indicating normal and radiation The sound
mark 50d is also displayed, and the user can recognize at a glance that the wiring of the speaker
is normal.
[0040]
If the execution key 4a is pressed in step S19, an end command for ending the phase
measurement process by the DSP 8 is sent to the DSP 8 (step S20), and the processing operation
related to the phase measurement display process is performed. finish.
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[0041]
If the execution key 4a is not pressed in step S11, the processing operation ends.
If the wiring of the speaker is not normal at step S17, an abnormality display as shown in FIG. 6B
is displayed on the LCD 6b of the display unit 6 (step S21), and the process proceeds to step S19.
In addition, as shown in FIG. 6B, the abnormality display in step S21 not only displays the "-"
mark 50b indicating that it is abnormal (opposite phase), but also the wiring mark 50c indicating
that it is abnormal and The radiation sound mark 50d is also displayed, and the user can
recognize at a glance that the wiring of the speaker is abnormal.
[0042]
The phase measurement process shown in FIG. 5 is a process of measuring the polarity of the
speaker, and starts up in response to the program transmission from the microcomputer 10 in
step S12 shown in FIG.
[0043]
The DSP 8 shown in FIG. 5 determines whether the phase measurement processing program
from the microcomputer 10 has been received (step S31).
If the phase measurement processing program has been received, the internal memory 8b in the
DSP 8 is initialized (step S32), an edge monitoring timer is set (step S33), and the reference audio
signal output from the speaker is microphone 2 The sound is collected at step S34, and it is
determined whether there is an edge in the reference sound signal in the sound collection (step
S35).
[0044]
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The edge monitoring timer set in step S33 is set to, for example, 30 msec which corresponds to
an interval period.
Further, the edge corresponds to an edge portion 60 of the rising signal and the falling signal in
a rectangular wave period which is a voiced signal in the reference audio signal as shown in FIG.
3A.
[0045]
If there is an edge portion in the reference voice signal being collected in step S35, it is
determined whether 30 msec has elapsed by the set edge monitoring timer (step S36).
If 30 msec has elapsed, the phase of the speaker is determined based on the edge portion, and
the measurement data as the result is stored in the internal memory 8b in the DSP 8 (step S37),
and the edge monitoring timer is set again. Then, it is determined whether or not there is a
measurement data request from the microcomputer 10 (step S39).
[0046]
If there is the measurement data request, the measurement data stored in the internal memory
8b is transmitted to the microcomputer 10 (step S40), and the measurement data stored in the
internal memory 8b is cleared (step S41). It is determined whether or not an end command to
end the phase measurement process shown in step S20 of FIG. 4 from 10 is received (step S42).
If the end command has been received, the processing operation related to the phase
measurement processing is ended.
[0047]
If it is determined in step S35 that there is no edge portion in the reference sound signal being
collected, the process proceeds to step S39.
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If 30 msec of the edge monitoring timer has not elapsed in step S36, the process proceeds to
step S38.
[0048]
If, in step S39, the microcomputer 10 does not request measurement data, the process proceeds
to step S42.
If the end command is not received from the microcomputer 10 in step S42, the process
proceeds to step S34.
[0049]
If the phase measurement processing program is not received from the microcomputer 10 in
step S31, the processing operation related to the phase measurement processing is ended.
[0050]
Therefore, according to the speaker polarity determination device, the rising signal and falling
signal of the voiced signal in the reference sound signal output from the speaker in the vehicle
compartment are detected, and the interval which is the silence signal is detected within the
predetermined time. When the falling signal and the rising signal are not detected within a time
corresponding to a period, and the rising signal and the falling signal are detected after the lapse
of the predetermined time, based on the detected rising signal and the falling signal. Since the
speaker polarity is determined, even if it is a reference audio signal obtained by reproducing a
commercially available reference audio signal disc with an audio device as an external sound
source, it is necessary to determine the polarity of the speaker. When detecting a voiced signal in
a reference audio signal, a tie with the reference audio signal obtained from the disc for
reference audio signal that is commercially available By matching the ring, it is possible to
reliably prevent erroneous detection of the rising signal and falling signal in the voiced signal, by
force may be reliably polarity determination of a speaker.
[0051]
In addition, according to the speaker polarity determination device, as described above, it is
possible to cope with a reference audio signal which is not synchronized with the device at all,
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that is, a reference audio signal obtained by a commercially available reference audio signal disc.
There is no need to use a large-scale system such as an audio analyzer that incorporates a
conventional signal generation circuit, and the device body can be made compact, so a speaker
polarity determination device with low cost and excellent workability can be obtained. Can be
provided.
[0052]
In addition, according to the speaker polarity determination device, the display of the
measurement result is a hold display of 1 sec regardless of the interval period of the reference
audio signal as in the related art, and the display of the polarity determination result as
compared to the related art. As the user can reliably recognize the polarity determination result
and the display unit 6 also displays the wiring mark 50c and the emitted sound mark 50d as the
measurement result, the user can confirm the measurement result by the user. Confirmation can
be significantly improved.
[0053]
According to the speaker polarity determination device of the audio apparatus in the first aspect
of the present invention configured as described above, the voiced signal included in the
reference audio signal by the fall detection means and the rise detection means The falling signal
and rising signal are detected, and the rising signal or falling signal is not detected within a
predetermined time, that is, within a time corresponding to an interval period which is a silent
signal in the reference audio signal, and the predetermined When the rising signal and the falling
signal are detected after a lapse of time, the polarity of the speaker is determined based on the
detected rising signal and falling signal. Even if it is a reference audio signal obtained by
reproducing an audio signal disc, in the reference audio signal necessary for determining the
polarity of the speaker When detecting a voiced signal, by adjusting the timing with the reference
voice signal obtained from the disc for reference voice signal on the market, erroneous detection
in rising and falling signals in the voiced signal can be surely made. Therefore, the polarity of the
speaker can be reliably determined.
[0054]
In addition, according to the speaker polarity determination device, as described above, it is
possible to cope with a reference audio signal which is not synchronized with the device at all,
that is, a reference audio signal obtained by a commercially available reference audio signal disc.
There is no need to use a large-scale system such as an audio analyzer that incorporates a
conventional signal generation circuit, and the device body can be made compact, so a speaker
polarity determination device with low cost and excellent workability can be obtained. Can be
provided.
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[0055]
Further, according to the speaker polarity determination device of the audio apparatus in the
second invention, since the polarity determination result is displayed on the display means, the
user can easily recognize the content.
[0056]
Further, according to the speaker polarity determination device of the audio device in the third
invention, the display means displays the result of the polarity determination at least for a time
corresponding to one cycle of the reference audio signal. By lengthening the display of the
polarity determination result, the user can reliably recognize the polarity determination result.
[0057]
Brief description of the drawings
[0058]
1 is a perspective view showing an embodiment of the speaker polarity determination device of
the audio device of the present invention.
[0059]
2 is a block diagram showing a schematic configuration inside the speaker polarity determination
device.
[0060]
3 is an explanatory diagram related to a normal reference audio signal.
[0061]
4 is a flowchart showing the processing operation of the microcomputer in the polarity
determination display process of the speaker polarity determination device.
[0062]
5 is a flowchart showing the processing operation of the microcomputer in the polarity
determination process of the speaker polarity determination device.
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[0063]
6 is an explanatory diagram for explaining the display content of the display unit at the time of
the polarity determination display process of the speaker polarity determination device.
[0064]
Explanation of sign
[0065]
DESCRIPTION OF SYMBOLS 1 speaker polarity determination apparatus 2 microphone (sound
collection means) 5 LED (display means) 6 display part (display means) 8 DSP (fall detection
means, rise detection means) 10 microcomputer (polarity judgment means, control means)
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