JPH09130896A - Speaker polarity deciding device of audio device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely enforce the polarity decision of a speaker by deciding the polarity of the speaker based on rise signal and fall signal within a prescribed time. SOLUTION: When an execution key 4a starting a speaker polarity decision function is depressed, a microcomputer 10 transmits a program executing a phase measuring processing to a DSP 8 and sets a timer for polarity measurement. The measured data obtained from the DSP 8 is fetched, the LCD 6b of a display part 6 is made to perform a normal display when the wiring of a speaker is normal and the LCD 6b is made to perform an abnormal display when the wiring is abnormal. Therefore, the rise signal and fall signal in the sound signal of the reference sound signals outputted from the speaker within a compartment are detected and the polarity of the speaker is decided based on the detected rise signal and fall signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker polarity determining device for an audio device for detecting a speaker polarity abnormality due to a wiring defect of a speaker provided in a closed space such as a vehicle compartment.

[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 specified polarity. In this case, if the polarity is wrong, the phase of the output sound from the speaker will be inverted and the sound quality will be significantly deteriorated.

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 has been considered.

In such a conventional speaker polarity determination device, a large-scale system using an audio analyzer composed of a personal computer and an analyzer is used, and the polarity of the speaker provided in the vehicle compartment is used in the audio analyzer. A signal generating circuit for generating a reference voice signal having a rectangular wave for making a determination is incorporated.
It should be noted that, as shown in FIG. 3 (a), the reference audio signal is usually, for example, 20 msec after the silent signal corresponding to the interval period of 30 msec and the silent signal.
And a sound signal corresponding to the rectangular wave period of 1 is a signal having one cycle.

In the speaker polarity determination device, the microphone is brought close to the speaker in the vehicle compartment, and
The audio analyzer is installed outside the vehicle compartment.
The audio analyzer is in a state where the audio device in the vehicle compartment and the microphone are connected.

According to the speaker polarity determining device, the reference voice signal is output as voice from the signal generating circuit of the audio analyzer via the audio device and the speaker, and the reference voice signal output as voice from the speaker is used as the microphone. And collects the collected reference sound signal and supplies it to the audio analyzer.

The audio analyzer analyzes the picked-up reference sound signal, detects a sound signal from the reference sound signal, and based on the rising signal and the falling signal in the detected sound signal. The polarity of the speaker is determined and the result of the polarity determination is displayed on the display screen of the personal computer.

Therefore, according to the speaker polarity determination device, even if the polarity is incorrect due to the improper connection between the speaker and the amplifier provided in the vehicle compartment, the user has an error in the polarity of the speaker on the display screen of the personal computer. Can be easily recognized.

Further, since the reference sound signal output from the speaker provided in the vehicle compartment is generated by the signal generating circuit in the device, it is necessary to synchronize the reference sound signal with the device. It's easy.

[0010]

However, according to the speaker polarity determination device of the conventional audio device described above,
Since it has a large-scale system configuration consisting of audio analyzers such as personal computers and analyzers,
The first problem is that the manufacturing cost is very high and the workability is very poor in terms of loading and unloading.

Focusing on such a first problem, a portable speaker polarity determining device as shown in FIG. 1 which is low in cost and compact and excellent in workability is conceivable.

According to such a portable speaker polarity determining device, it is difficult to incorporate a signal generating circuit for generating a reference voice signal due to its low cost and downsizing, and therefore a commercially available reference voice is used. It is conceivable to obtain the reference audio signal by reproducing the signal disk with an audio device in the vehicle compartment. In the speaker polarity determination device including the audio analyzer, a signal generation circuit for generating a reference voice signal is internally provided, so that synchronization can be easily achieved.

However, according to the portable speaker polarity determination device, a commercially available reference voice signal disc is reproduced by an audio device which is an external sound source, and the presence of the reference voice signal in the reference voice signal necessary for the polarity determination of the speaker. When detecting the rising signal and the falling signal in the sound signal, it is very difficult to synchronize with the reference sound signal obtained from the commercially available reference sound signal disc, and the timing is deviated to A second problem is that a rising signal or falling signal is erroneously detected.

Further, according to the speaker polarity determination device including the audio analyzer, the polarity determination result is displayed during the interval period of the reference audio signal on the display screen of the personal computer displaying the polarity determination result. Therefore, there is a third problem that it is difficult for the user to confirm the polarity determination result on the display screen when the interval period is short.

The present invention has been made in view of the above-mentioned first and second problems, and the first object thereof is to use a reference voice signal which is not synchronized with the apparatus at all. Also, it is possible to accurately detect a rising signal and a falling signal from a voiced signal in the reference audio signal, and to provide a speaker polarity determination device for an audio device that is low in cost and excellent in workability. It is in.

The present invention has been made in view of the above-mentioned third problem, and the second object thereof is as follows.
It is an object of the present invention to provide a speaker polarity determination device for an audio device that can remarkably confirm the polarity determination result.

[0017]

In order to achieve the first object, a speaker polarity determining device for an audio device according to a first aspect of the present invention is a device for determining a predetermined time period, which is output from an external sound source through a speaker. Sound collecting means for collecting a reference sound signal having a period of one cycle of a soundless signal and a sound signal shorter than the predetermined time after the soundless signal, and sound in the collected reference sound signal A fall detection means for detecting a fall signal from a signal, a rise detection means for detecting a rise signal from a sound signal in the picked-up reference audio signal, and a rise detection means and a fall detection means. Polarity determining means for determining the polarity of the speaker based on the signal, and a rising signal or falling signal is detected by the rising detection means and the falling detection means,
If the rising signal or the falling signal is not detected within the predetermined time and the rising signal and the falling signal are detected after the predetermined time has elapsed, the polarity is determined based on the detected rising signal and the falling signal. And a control unit that causes the determination unit to determine the polarity of the speaker.

The external sound source and the speaker are, for example, an audio device and a speaker provided in a vehicle compartment, and the reference sound signal output from the speaker by the external sound source is reproduced by the external sound source. It is obtained with a commercially available disc for reference audio signals. Further, the rising signal and the falling signal correspond to the falling signal and the falling signal in the rectangular wave signal which is the sound signal in the reference voice signal.

Therefore, according to the speaker polarity determining device of the audio device in the first aspect of the invention, the rising edge detecting means and the falling edge detecting means detect the rising edge signal or the falling edge signal, and within the predetermined time, that is, the silence signal. If the rising signal or the falling signal is not detected within the time corresponding to the interval period which is a signal, and the rising signal and the falling signal are detected after the lapse of the predetermined time, the detected rising signal and the rising signal are detected. Since the polarity determining means determines the polarity of the speaker based on the falling signal, it is assumed that the reference audio signal is obtained by reproducing a commercially available reference audio signal disc with an audio device that is an external sound source. Also, when detecting a voiced signal in the reference voice signal necessary for polarity determination of the speaker, the commercially available reference voice signal is used. By synchronizing the timing with the reference audio signal obtained from the audio disc, it is possible to reliably prevent erroneous detection of the rising signal and the falling signal of the sound signal, and, by force, reliably determine the polarity of the speaker. It can be carried out.

Further, according to the speaker polarity determining device, as described above, even for the reference audio signal which is not completely synchronized with the device, that is, the reference audio signal obtained by the commercially available reference audio signal disk. The speaker polarity is low and cost-effective, because it is possible to make the main body compact, and it does not need to be a large-scale system like an audio analyzer with a built-in signal generation circuit. A determination device can be provided.

In order to achieve the first and second objects, the speaker polarity determining device for an audio device according to the second aspect of the present invention is the speaker polarity determining device for an audio device according to the first aspect. In addition to the configuration, the control means causes the display means to display the speaker polarity determination result determined by the polarity determination means.

Therefore, according to the speaker polarity determination device of the audio device of the second aspect of the invention, the polarity determination result is displayed on the display means, so that the user can easily recognize the content.

In order to achieve the third object, according to the speaker polarity determining device for an audio device of the third invention of the present invention, the speaker polarity determining device for an audio device according to the second invention has the configuration. In addition, the control means continuously displays the polarity determination result on the display means,
It is characterized in that it is displayed for at least the time corresponding to one cycle of the reference audio signal.

The time corresponding to one cycle of the reference voice signal means that a sound signal of a predetermined time is generated, a sound signal of a shorter time than the predetermined time is generated subsequent to the sound signal, and This is the time until a silent signal is generated.

Therefore, according to the speaker polarity determining device of the audio device in the third aspect of the invention, the polarity determining result is displayed on the display means for at least the time corresponding to one cycle of the reference audio signal. Therefore, the user can surely recognize the polarity determination result by lengthening the display of the polarity determination result as compared with the related art.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a speaker polarity determination device for an audio device of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a speaker polarity determination device of an audio device of the present invention.

In FIG. 1, the speaker polarity determining device 1
Is a device that is much smaller and more portable than the system described in the related art. A microphone 2 that is integrated with the device body is connected to the tip of the upper part of the device, and an external microphone 3 is connected near the device. Possible connection parts (not shown) are provided.

On the upper surface of the speaker polarity determination device 1, an operation unit 4 for inputting various commands relating to the device, an LED 5 for lighting up and displaying operating states of various functional modes described later, and the function. It has a display unit 6 for displaying and outputting various data obtained in modes and the like.

Next, the internal configuration of the speaker polarity determination device 1 will be described. FIG. 2 is a block diagram showing a schematic configuration inside the speaker polarity determination device 1.

In FIG. 2, the speaker polarity determination device 1 is
The microphone 2 that picks up a sound signal such as a sweep signal or a test signal output from a speaker of an audio device in the vehicle compartment, and an A / D converter that digitally converts the sound signal picked up by the microphone 2. 7 and
A digital signal processor that performs signal processing on the digitally converted audio signal (hereinafter, simply referred to as DSP)
8, the operation unit 4, the display unit 6, and the LED 5 described above
And an E ² P that stores the data obtained by the DSP 8.
It has a memory 9 such as a ROM and a microcomputer 10 that controls the entire gain measuring apparatus 1. Incidentally, it goes without saying that the input signal to the A / D converter 7 may be an audio signal picked up by the external microphone 3 in addition to the audio signal picked up by the microphone 2. Nor.

The display unit 6 has a display microcomputer 6a for controlling the entire display unit 6 based on the display data from the microcomputer 10, and an LCD 6 for displaying the data content.
b, and a driver 6c for driving and controlling the LCD 6b under the control of the display microcomputer 6a.

Further, the operation section 4 has an execution key 4a for designating, activating or terminating various function modes, and a memory key 4b for storing the data obtained by the function mode in the memory 9. ing.

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.

Further, in the speaker polarity determining apparatus 1, a set time is set for each function, and the power of the gain measuring apparatus is automatically turned off after the set time has elapsed.
It has an automatic power-off function to enable the set time to be selected according to a predetermined operation by the user.

Next, the operation of the speaker polarity determining device 1 will be described with reference to FIGS. 3 to 6. FIG. 3 is an explanatory diagram related to a general reference voice signal.

The reference voice signal of the commercially available disc for the reference voice signal reproduced by the audio device in the passenger compartment is, for example, as shown in FIG. 3A, an interval period corresponding to a silent signal of 30 msec and a rising signal. And a rectangular wave period corresponding to a voice signal of 20 msec including the fall signal, a total of 50 msec is set as one cycle, and by repeating the cycle, a rising signal and a falling signal in the voice signal are always at predetermined intervals. You can get a signal.

Next, the operation of the speaker polarity determination function will be described. FIG. 4 is a flowchart showing the processing operation of the microcomputer 10 in the phase measurement display processing 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.

The phase measurement display processing is the DSP 8
Then, the phase measurement process is executed, and the polarity determination result is displayed on the display unit 6. In the phase measurement process, a commercially available audio device for a reference audio signal is reproduced in the vehicle interior, the reference audio signal is output from a speaker, and the microphone 2 of the device is brought close to the speaker. The processing operation is started.

In FIG. 4, the microcomputer 10 determines whether or not the execution key 4a for activating the speaker polarity determination function has been pressed (step S11). If the execution key 4a is pressed, a program for executing the phase measurement processing of FIG. 5 described later is transmitted to the DSP 8 (step S12), a polarity measurement timer is set (step S13), and the polarity measurement is performed. 1 which is the set value of the timer for
It is determined whether or not sec has elapsed (step S1
4). If the 1 second has passed, the DSP is
8 to obtain polarity measurement result data (hereinafter, simply referred to as measurement data) which is a measurement result of a phase measurement process described later (step S15), and FIG. 3B or FIG. 3 obtained from the DSP 8 in response to the measurement request. The measurement data shown in FIG. 3 (c) is fetched (step S16), and it is determined based on the fetched measurement data whether the polarity of the speaker is in phase, that is, whether the speaker wiring is normal (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 or not the execution key 4a is pressed (step S18). Step S1
9). The normal display in step S18 is as shown in FIG.
As shown in (a), not only is the "+" mark 50b indicating normal (in-phase) displayed, but the wiring mark 50c and the radiated sound mark 50d indicating normal are also displayed. The user can recognize at a glance that the speaker wiring is normal.

In step S19, the execution key 4
If a is pressed, an end command for ending the phase measurement processing by the DSP 8 is transmitted to the DSP 8 (step S20), and the processing operation related to the phase measurement display processing is ended.

If the execution key 4a has not been pressed in step S11, the processing operation ends. If the speaker wiring is not normal in step S17, an abnormal 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. The abnormality display in step S21 not only displays the "-" mark 50b indicating the abnormality (reverse phase) as shown in FIG. 6B, but also the wiring mark 50c indicating the abnormality. The radiated sound mark 50d is also displayed, and the user can recognize at a glance that the speaker wiring is abnormal.

The phase measuring process shown in FIG. 5 is a process for measuring the polarity of the speaker, and starts the activation in response to the program transmission from the microcomputer 10 in step S12 shown in FIG.

The DSP 8 shown in FIG. 5 determines whether or not the phase measurement processing program from the microcomputer 10 has been received (step S31). If the phase measurement processing program is received, the internal memory 8b in the DSP 8 is initialized (step S32), the edge monitoring timer is set (step S33), and the reference audio signal output from the speaker is set to the microphone 2 The sound is picked up (step S34), and it is determined whether or not there is an edge in the reference sound signal in the sound picked up (step S35).

The edge monitoring timer set in step S33 is set to 30 msec corresponding to the interval period, for example. Further, the edge corresponds to the edge portion 60 of the rising signal and the falling signal in the rectangular wave period, which is the voiced signal in the reference audio signal, as shown in FIG.

If there is an edge portion in the reference voice signal during the sound collection in step S35, it is determined whether or not 30 msec has elapsed with the set edge monitoring timer (step S36). If 30 msec has elapsed, the phase of the speaker is determined based on the edge portion, 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, (step S38), it is determined whether or not there is a measurement data request from the microcomputer 10 (step S39).

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). Then, it is determined whether or not an end command for ending the phase measurement process shown in step S20 of FIG. 4 is received from the microcomputer 10 (step S42). If the end command is received, the processing operation related to the phase measurement processing is ended.

If there is no edge portion in the reference voice signal in the sound pickup in step S35, step S39.
Move to If 30 msec of the edge monitoring timer has not elapsed in step S36, the process proceeds to step S38.

If there is no measurement data request from the microcomputer 10 in step S39, 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.

Further, in step S31, the microcomputer 1
If the phase measurement processing program has not been received from 0, the processing operation related to the phase measurement processing ends.

Therefore, according to the speaker polarity determination device, the rising signal and the falling signal in the sound signal in the reference sound signal output from the speaker in the vehicle compartment are detected, and within the predetermined time, that is, the silent signal. If the falling signal and the rising signal are not detected within the time corresponding to the interval period and the rising signal and the falling signal are detected after the predetermined time has elapsed, the detected rising signal and the falling signal. Since the polarity of the speaker is determined based on the above, even if the reference audio signal is obtained by playing a commercially available reference audio signal disc with an audio device that is an external sound source, the polarity determination of the speaker is performed. The reference voice obtained from the commercially available reference voice signal disc when detecting the voice signal in the reference voice signal required for By matching the timing with the items, 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.

Further, according to the speaker polarity determining apparatus, even with respect to the reference audio signal which is not completely synchronized with the apparatus as described above, that is, the reference audio signal obtained with the commercially available reference audio signal disk, The speaker polarity is low and cost-effective, because it is possible to make the main body compact, and it does not need to be a large-scale system like an audio analyzer with a built-in signal generation circuit. A determination device can be provided.

Further, according to the speaker polarity determining device, the display of the measurement result is held for 1 sec regardless of the interval period of the reference audio signal as in the conventional case, so that the polarity determination can be performed as compared with the conventional case. Since the display of the result is lengthened so that the user can surely recognize the polarity determination result, and the wiring mark 50c and the radiation sound mark 50d are also displayed on the display unit 6 as the measurement result, It is possible to remarkably improve the confirmation of the measurement result.

[0053]

According to the speaker polarity determining device of the audio device of the first aspect of the present invention having the above-described structure, the sound signal included in the reference voice signal by the falling edge detecting means and the rising edge detecting means. The rising signal or the falling signal is detected, the rising signal or the falling signal is not detected within a predetermined time, that is, the time corresponding to the interval period which is a silent signal in the reference audio signal, and the predetermined When a rising signal and a 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 the reference audio signal was obtained by playing the audio signal disc, the reference audio signal required for polarity determination of the speaker When detecting a voiced signal, by synchronizing the timing with the reference audio signal obtained from the commercially available reference audio signal disc, it is possible to ensure erroneous detection in the rising signal and the falling signal in the audio signal. Therefore, the polarity of the speaker can be surely determined.

Further, according to the speaker polarity determining apparatus, even with respect to the reference audio signal which is not completely synchronized with the apparatus as described above, that is, the reference audio signal obtained by the commercially available reference audio signal disk is used. The speaker polarity is low and cost-effective, because it is possible to make the main body compact, and it does not need to be a large-scale system like an audio analyzer with a built-in signal generation circuit. A determination device can be provided.

Further, according to the speaker polarity determination device of the audio device of the second invention, the polarity determination result is displayed on the display means, so that the user can easily recognize the content.

Further, according to the speaker polarity determining device of the audio device in the third aspect of the invention, the polarity determining result is displayed on the display means for at least the time corresponding to one cycle of the reference audio signal. By making the display of the polarity determination result longer than in the past, the user can surely recognize the polarity determination result.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a speaker polarity determination device of an audio device of the present invention.

FIG. 2 is a block diagram showing a schematic configuration inside the speaker polarity determination device.

FIG. 3 is an explanatory diagram relating to a normal reference audio signal. a) Reference audio signal waveform diagram b) Measurement data when polarity is normal c) Measurement data when polarity is abnormal

FIG. 4 is a flowchart showing a processing operation of a microcomputer in a polarity determination display process of the speaker polarity determination device.

FIG. 5 is a flowchart showing a processing operation of a microcomputer in polarity determination processing of the speaker polarity determination device.

FIG. 6 is an explanatory diagram illustrating contents displayed on a display unit during polarity determination display processing of the speaker polarity determination device. a) Display contents when polarity is normal b) Display contents when polarity is abnormal

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Speaker polarity determination device 2 Microphone (sound collection means) 5 LED (display means) 6 Display section (display means) 8 DSP (falling detection means, rising detection means) 10 Microcomputer (polarity determination means, control means)

Claims (3)

[Claims] 1. A reference voice signal, which is output from an external sound source through a speaker and has a period of a silent signal for a predetermined time and a sound signal for a shorter time than the predetermined time following the silent signal, is collected. A sound pickup means for making a sound, a fall detection means for detecting a fall signal from a sound signal in the collected reference sound signal, and a rise signal from the sound signal in the collected sound signal. Rising detection means for detecting, a polarity determination means for determining the polarity of the speaker based on the signals detected by the rising detection means and the falling detection means, and a rising signal for the rising detection means and the falling detection means. Alternatively, a falling signal is detected, the rising signal or the falling signal is not detected within the predetermined time, and the rising signal and the falling signal are detected after the predetermined time has elapsed. When the speaker polarity determination device of the audio device, characterized in that a control means on the basis of which the detected rising signal and falling signal to determine the polarity of the speaker on the polarity determining circuit. 2. The speaker polarity determination device for an audio apparatus according to claim 1, wherein the control unit causes the display unit to display the speaker polarity determination result determined by the polarity determination unit. 3. The audio apparatus according to claim 2, wherein the control unit continuously displays the polarity determination result on the display unit for a time period corresponding to at least one cycle of the reference audio signal. Speaker polarity determination device.