JP6382539B2 - Vibration detector - Google Patents

Description

  The present invention relates to a vibration detection apparatus, and more particularly to a vibration detection apparatus that detects vibrations of a vibrator (hereinafter referred to as vibrator vibration) generated by a mobile device such as a mobile phone or a smartphone.

  2. Description of the Related Art Conventionally, a mobile phone pocket for inserting and placing a mobile phone on the front plate of a gaming machine has been provided, and when a mobile phone stored in the mobile phone pocket receives an incoming call, the vibration vibration of the mobile phone is detected by a vibration sensor. There is one that notifies a user of an incoming call to a mobile phone by detecting and vibrating a launch handle of a gaming machine via an actuator (see, for example, Patent Document 1).

JP 2001-300024 A

  By the way, in the gaming machine of Patent Document 1 described above, when the vibrator vibration of the mobile phone is detected by the vibration sensor, the vibration noise generated by the motor in the gaming machine other than the vibrator of the mobile phone is erroneously detected as the vibrator vibration. In some cases, there is a problem that it is impossible to accurately detect only vibrations having a desired frequency.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a vibration detection device that can accurately detect only vibrations of a desired frequency to be detected.

In order to achieve this object, the present invention provides a voltage detection means (21) for detecting an output voltage detected by the vibration detection means (11) based on a predetermined threshold voltage (sh), and the voltage detection means ( 21) measuring the detection interval time from when the output voltage is detected based on the threshold voltage (sh) to when the output voltage is detected next based on the threshold voltage (sh). Means (22), and when the detection interval time measured by the timing means (22) is determined to be within a preset reference time range (R), the detection interval time is a period of vibration having a desired frequency. The comparison means (23) for outputting the determination result (S5), the calculation means (31) for calculating the determination result (S5) output by the comparison means (23), and the calculation means (31) By And a computed result of judgment (S5) determining means and detects the vibration of said desired frequency on the basis of the cumulative value (S6) of (32), said voltage detecting means (21), the output voltage when one of a predetermined one of the falling and rising edges crosses the predetermined threshold voltage, to so that to detect the output voltage.

  In the present invention, from when the detection interval time is determined to be within the reference time range (R) by the comparison means (23), the output voltage is similarly detected based on the threshold voltage. Vibration-free time measuring means (41) for measuring the vibration-free time, and when the vibration-free time measured by the vibration-free time measuring means (41) is longer than a certain vibration-free time, the calculation means (31) And cumulative value clearing means (42) for clearing the cumulative value (S6) calculated by the above.

  In the present invention, display means (50) for visually displaying that the vibration is detected by the determination means (32) is further provided.

  According to the present invention, it is determined that the detection interval time from when the output voltage is detected based on the threshold voltage to the next time when the output voltage is detected based on the threshold voltage is within the reference time range. Only when the determination result that the detection interval time is the vibration period of the desired frequency is output, and the continuity of the vibration of the desired frequency can be determined based on the accumulated value of the determination result, the desired frequency It can be determined that the vibration of is detected.

  According to the present invention, the no-vibration time from when the detection means determines that the detection interval time is within the reference time range until the next time the output voltage is detected based on the threshold voltage is constant. If it is longer than the allowable time, the accumulated value counted by the counting means is cleared, so that it is possible to prevent erroneous determination due to accumulation of noise vibration having a long no-vibration time.

  According to the present invention, the fact that vibration is detected by the determination means is visually displayed via the display means, so that the user can visually recognize that there is vibration of the desired frequency.

It is a block diagram which shows the structure of the vibration detection apparatus which concerns on embodiment of this invention. It is a wave form diagram which shows the period of a vibration of frequency 150Hz. It is a wave form diagram which shows the period of a vibration of frequency 500Hz. It is a wave form diagram which shows the period of the vibration of frequency 50Hz. It is a wave form diagram with which it uses for description of vibrator vibration detection operation | movement when a high frequency noise vibration is mixed. It is a flowchart which shows a vibrator vibration detection processing procedure. It is a wave form diagram with which it uses for description of vibrator vibration detection operation | movement when the low frequency noise vibration is mixed.

  Embodiments of the present invention will be described below.

<Outline of vibration detector>
Although the vibration detection device according to the present embodiment is not shown, a portable device such as a mobile phone or a smartphone is provided in a pocket portion provided on a front panel of a gaming machine pedestal machine disposed between gaming machines. For example, a vibrator vibration having a frequency of 100 Hz to 200 Hz generated by a vibrator built in the portable device is detected in the housed state.

  The vibrator vibration of the portable device is used as a notification means when a notification such as an incoming call, an incoming mail, an alarm based on a schedule is given to the user from the portable device.

  However, in the gaming machine pedestal machine, for example, vibration of a motor that rotates a fan of an air cleaner for generating an air curtain and other vibrations that cause various noises (hereinafter referred to as noise vibrations) are generated. To do. For this reason, there is a state where the vibrator vibration of the portable device is not generated but only the noise vibration is transmitted to the pocket portion, or the vibrator vibration and noise vibration of the portable device are superimposed on the pocket portion. obtain. Therefore, the vibration detection device of the present invention accurately detects only the vibrator vibration by the notification from the mobile device while excluding noise vibration, and visually recognizes it to the user.

<Configuration of vibration detection device>
As shown in FIG. 1, the vibration detection apparatus 1 includes a vibration detection sensor 11 that detects all vibrations including vibrator vibration and noise vibration, and outputs a vibration output voltage that is a detection result of the vibration detection sensor 11 to a desired amplitude level. When it is determined that the amplification circuit 12 to be amplified, the period determination unit 20 that determines the period of the vibration, and the period is the period of the vibrator vibration of the portable device that is desired to be detected, the accumulated value of the determined determination result Based on the continuity determination unit 30 that determines the continuity of the vibration of the vibrator based on this, when the vibration-free time between the vibrations is long and the vibration cannot be detected continuously, it is determined that the period of the vibrator vibration is present. It is comprised by the reset part 40 which resets the cumulative value of a determination result.

  In addition, when the continuity determination unit 30 can determine the continuity of the vibrator vibration, the vibration detection device 1 indicates that the vibration is a vibrator vibration (for example, a frequency of 150 Hz) of the portable device desired to be detected. S7 is output to the display means 50 and displayed.

  The vibration detection sensor 11 is a piezoelectric vibration sensor or the like, for example, and is provided on the bottom surface of the pocket portion that houses the portable device on the front panel of the inter-machine. The vibration detection sensor 11 detects the vibrator vibration of the portable device by the piezoelectric body of the piezoelectric vibration sensor, and outputs a sensor output signal S1 generated by converting the vibrator vibration to a voltage to the amplifier circuit 12. Here, the vibrator vibration may be superimposed with the noise vibration of the motor of the gaming machine pedestal machine and other various noise vibrations. Hereinafter, the term “vibrator vibration” includes the case where the noise vibration is superimposed.

  The amplifying circuit 12 amplifies the vibration frequency of the vibrator of the portable device that is desired to be detected from the sensor output signal S1 of the vibration detection sensor 1 to a desired level, and the amplified sensor output signal S2 is voltage detection means of the period determination unit 20 To 21. That is, the amplifier circuit 12 outputs an amplified sensor output signal S2 to make it easier to detect the frequency of vibrator vibration even when the frequency component of other noise vibration is superimposed on the sensor output signal S1 of the vibration detection sensor 11. To do. However, when the amplitude of the vibrator vibration is sufficiently large, the amplifier circuit 12 is not an essential component for the vibration detection device 1.

  As shown in FIG. 2, the voltage detection means 21 of the period determination unit 20 has a preset threshold voltage sh (for example, −1.5 V) at the falling edge of the sensor output signal S2 of 150 Hz supplied from the amplifier circuit 12, for example. Is detected (including a state in which only the threshold voltage sh has been reached), the detection signal S3 is output to the time measuring means 22. Specifically, the voltage detection means 21 is composed of a comparison circuit, for example, and as shown in FIGS. 5 and 7, the voltage value of the sensor output signal S2 supplied from the amplifier circuit 12 is a preset threshold voltage sh (− The detection signal S3 is output at the timing of the falling edge of the binarized output S3a when the voltage is lower than 1.5V).

  The time measuring means 22 is composed of, for example, a timer. When receiving the detection signal S3 from the voltage detecting means 21, the time measuring means 22 starts time measurement from that time point, and next detects the voltage in the same manner as when the detection signal S3 is first detected. Time information S4 (period T) representing the detection interval time until the detection signal S3 is supplied from the means 21 (that is, the period T (6.667 ms) if the sensor output signal S2 has a frequency of 150 Hz) is output to the comparison means 23. To do.

  The comparison means 23 is composed of, for example, a comparison circuit, and compares the time information S4 (period T) supplied from the time measurement means 22 with a preset reference time range R (5.0 ms to 10.0 ms). It is determined whether or not the time information S4 (cycle T) is within the reference time range R. When the comparison unit 23 determines that the time information S4 (period T) is within the reference time range R, the comparison unit 23 outputs the determination result S5 to the count unit 31 of the continuity determination unit 30 and the non-vibration timing unit 41 of the reset unit 40. To do.

  This reference time range R (5.0 ms to 10.0 ms) is a time range having a period corresponding to a frequency range of 100 Hz to 200 Hz, for example, including a frequency of 150 Hz of vibrator vibration of a portable device that is desired to be detected. Therefore, when the frequency of the vibrator vibration of the portable device is 150 Hz, the time information S4 (period T) is 6.667 ms and is included in the reference time range R (5.0 ms to 10.0 ms). Is output.

  For example, as shown in FIG. 3, the comparison means 23 has the time information S4 (period T) of the sensor output signal S2 supplied from the time measurement means 22 as 2.0 ms, and the reference time range R (5.0 ms to 10. If it is not within 0 ms), the time information S4 (period T) is not that of the vibrator vibration (100 Hz to 200 Hz) of the mobile device desired to be detected, for example, the sensor output signal S2 (noise vibration) of frequency 500 Hz. it is conceivable that. In this case, the determination result S5 is not output to the counting means 31 of the continuation determination unit 30.

  As shown in FIG. 4, the comparison means 23 has the time information S4 (period T) of the sensor output signal S2 supplied from the time measurement means 22 as 20.0 ms, and the reference time range R (5.0 ms to 10. If it is not within 0 ms), the time information S4 (period T) is not that of the vibrator vibration (100 Hz to 200 Hz) of the mobile device desired to be detected, for example, the sensor output signal S2 (noise vibration) having a frequency of 50 Hz. it is conceivable that. Also in this case, the determination result S5 is not output to the counting means 31 of the continuation determination unit 30.

  The counting unit 31 of the continuity determination unit 30 counts (calculates) the determination result S5 supplied from the comparison unit 23, and outputs the cumulative value S6 that is the calculation result of the determination result S5 to the determination unit 32.

  The determination unit 32 is, for example, a comparison circuit, and compares the cumulative value S6 (number of determination results S5) output from the count unit 31 with a reference value (for example, 50 times) set in advance for determination of continuity. To do. The determination unit 32 determines whether or not the cumulative value S6 has reached the reference value (50 times). When the cumulative value S6 has reached the reference value (50 times), the frequency range of 100 Hz to 200 Hz desired for detection is determined. A vibration detection result S7 indicating that the vibrator vibration of the corresponding portable device has been detected is output to the display means 50.

  Here, the reason why it is determined that the cumulative value S6 has reached the reference value (50 times) is that if the vibration is vibrator vibration of a portable device, the vibration is considered to occur continuously for about 50 times the reference value. . Accordingly, if this reference value is set long, it takes time to output the vibration detection result S7, but the vibration vibration detection accuracy is improved. If this reference value is set short, the vibration detection result S7 is output. Even if the time is shorter, the vibration vibration detection accuracy is lowered.

  Based on the vibration detection result S7, the display means 50 displays characters such as “incoming call” on a display such as an LCD (Liquid Crystal Display) provided in the vicinity of the pocket portion of the front panel of the interpolator, A blinking display or lighting display by LED is performed. Thereby, the display means 50 can make a user visually recognize the notification from a portable device.

  By the way, the non-vibration timing means 41 of the reset unit 40 is composed of, for example, a timer. When the determination result S5 is supplied from the comparison unit 23 of the period determination unit 20, the time measurement operation is started from that time point. The detection interval time until the next determination result S5 is supplied from the 20 comparison means 23 (that is, the no-vibration time during which no vibrator vibration is detected) is counted, and no-vibration time information S8 representing the detection interval time is counted. Output to the clear means 42.

  The count clear means 42 compares the no-vibration time information S8 output from the no-vibration timing means 41 with a predetermined no-vibration allowable time (for example, 50 ms). When the no-vibration time information S8 is longer than the no-vibration allowable time, the count clear means 42 has a long interval between the detection of the vibrator vibration determination result S5 and the detection of the next vibrator vibration determination result S5. Therefore, it is determined that this is not vibrator vibration, and a count clear command S9 is output to the counting means 31 of the continuity determination unit 30.

  In response to receiving the count clear command S9, the counting means 31 of the continuity determination unit 30 resets the accumulated value S6 of the determination result S5 calculated so far to “0”, and is supplied next. Recalculate from the result S5.

<Vibration detection operation by vibration detector>
In the vibration detection apparatus 1 having such a configuration, an operation for actually detecting a vibrator vibration having a frequency of 150 Hz will be described. It is considered that the vibration of the vibrator is superimposed with noise vibration of the motor of the machine for the gaming machine and various other noise vibrations.

<Vibrator vibration detection operation when high-frequency noise vibration is mixed>
For example, as shown in FIG. 5, when the desired vibrator vibration to be detected is indicated by a solid line having a frequency of 150 Hz and an amplitude of 2V, the noise vibration superimposed on the vibrator vibration is indicated by an ultrathin line having a frequency of 500 Hz and an amplitude of 1V. In this case, the sensor output signal S2 output via the vibration detection sensor 11 and the amplifier circuit 12 is indicated by a thick line.

  In this case, the falling edge of the binarized output S3a obtained by binarizing the waveform of the sensor output signal S2 based on the threshold voltage sh of −1.5 V is output as the detection signal S3 of the voltage detecting means 21. Vibrator vibrations and noise vibrations that are desired to be detected are such that two wave peaks overlap at one time, and two wave peaks and valleys overlap and cancel each other at a certain time. When the vibration vibration detection signal S3 is detected three times, the detection signal S3 is detected four times more than once.

  However, since the time information S4 (period T) indicating the detection interval time between the third detection signal S3 and the fourth detection signal S3 is not within the reference time range R (5.0 ms to 10.0 ms), The determination result S5 is not output from the comparison unit 23 for the fourth detection signal S3, and is not counted by the counting unit 31 of the continuity determination unit 30. That is, since the determination result S5 is not output for the fourth detection signal S3 corresponding to the noise vibration, it is excluded (NG) from the count target of the counting means 31.

  The vibrator vibration detection operation in the case of detecting the vibrator vibration of the portable device based on the sensor output signal S2 shown in FIG. 5 will be described with reference to the flowchart of FIG.

  In step SP1, the vibration detection apparatus 1 binarizes the sensor output signal S1 based on the threshold voltage sh of −1.5 V by the voltage detection means 21 of the period determination unit 20, and detects the falling edge of the binarized output S3a. It is determined whether it has been completed.

  If a negative result (step SP1: No) is obtained here, the process returns to step SP1 and waits until a falling edge can be detected. If a positive result (step SP1: Yes) is obtained, the falling edge of the binarized output S3a is obtained. After outputting the detection signal S3 indicating that the edge has been detected to the time measuring means 22, the process proceeds to the next step SP2.

  In step SP2, the time measuring means 22 starts measuring the detection interval time, that is, the period T from when the detection signal S3 is supplied until the next detection signal S3 is supplied, and then proceeds to the next step SP3.

  In step SP3, whether or not the voltage detection means 21 has detected the falling edge of the next binarized output S3a while the time measurement means 22 has started timing from the time when the detection signal S3 is supplied. Determine. If a negative result (step SP3: No) is obtained here, the process returns to step SP3 and waits until the voltage detecting means 21 can detect the falling edge of the next binarized output S3a, but the positive result (step SP3: Yes). Is obtained, the detection signal S3 indicating that the falling edge of the next binarized output S3a has been detected is output from the voltage detecting means 21 to the time measuring means 22, and then the process proceeds to the next step SP4.

  In step SP4, the timing means 22 has been supplied with the detection signal S3 indicating that the falling edge of the next binarized output S3a has been detected, so the time from the first detection signal S3 to the next detection signal S3 is received. After measuring the period T and outputting the time information S4 of the period T to the comparison means 23, the process proceeds to the next step SP5.

  In step SP5, the comparison means 23 determines whether or not the time information S4 (cycle T) is within a preset reference time range R (5.0 ms to 10.0 ms). If a negative result (step SP5: No) is obtained here, this means that the time information S4 (cycle T) is not within the reference time range R (5.0 ms to 10.0 ms). T) indicates that it is not the vibration vibration period T of the desired frequency band of 100 Hz to 200 Hz. At this time, without returning the determination result S5, the process returns to step SP1 to detect the next detection signal S3. The timing of the period T is started from the time point.

  Thus, when the time information S4 of the period T from the time point of the first detection signal S3 to the next detection signal S3 is not within the reference time range R (5.0 ms to 10.0 ms), the next detection signal S3. Is not based on the period T of the vibrator vibration in the desired frequency band of 100 Hz to 200 Hz (“NG”). Accordingly, at this time, the determination result S5 is not output from the comparison means 23. Thereby, it is possible to exclude in advance that the determination result S5 of the noise vibration is reflected in the count value by the counting means 31 of the continuity determination unit 30.

  On the other hand, if an affirmative result (step SP5: Yes) is obtained in step SP5, this is because the time information S4 (cycle T) is within the reference time range R (5.0 ms to 10.0 ms). The next detection signal S3 is based on the vibrator vibration period T in the desired frequency band of 100 Hz to 200 Hz. Accordingly, at this time, the comparison unit 23 outputs the determination result S5 to the counting unit 31 of the continuity determination unit 30 and the non-vibration timing unit 41 of the reset unit 40.

  Specifically, as shown in FIG. 5, the detection signal S3 of the first, fourth, eighth, twelfth, sixteenth, twentieth,... Is considered to be a period of noise vibration. Is not output from the comparison means 23. That is, since the detection signals S3 of the second, third, fifth to seventh, ninth to eleventh, thirteenth to fifteenth, seventeenth to nineteenth, and so on are considered to be based on the period T of the vibrator vibration, Only the determination result S5 is output from the comparison unit 23 and is calculated by the counting unit 31 of the continuity determination unit 30.

  Incidentally, the reason why the detection signal S3 when the falling edge of the first binarized output S3a is detected is (NG) is the time information from the previous detection signal S3 to the first detection signal S3. This is because it cannot be determined whether or not S4 is within the reference time range R (5.0 ms to 10.0 ms). Therefore, the first detection signal S3 is excluded from the calculation target of the counting means 31.

  In step SP6, the counting unit 31 of the continuity determining unit 30 sets “1” to the current count number in order to calculate the determination result S5 of the vibrator vibration period T output from the comparing unit 23. Add and move to next step SP9.

  At the same time, at step SP7, the no-vibration timing means 41 of the reset unit 40 starts the no-vibration timing operation from the time when the determination result S5 of the vibration period T of the vibrator vibration that is desired to be detected is received. Move on.

  In step SP8, the no-vibration timing means 41 has a predetermined no-vibration counting time until the next determination result S5 is supplied after the determination result S5 is determined to be the period T of the vibrator vibration. It is determined whether or not the vibration-free allowable time of 50 ms is exceeded.

  If an affirmative result (step SP8: Yes) is obtained, this means that the vibration-free time exceeds the vibration-free allowable time of 50 ms, and the vibration-free time is too long. This indicates that there is a high possibility of noise vibration. At this time, the process proceeds to the next step SP9.

  In step SP9, the count clear unit 42 outputs a count clear command S9 to the count unit 31 of the continuity determination unit 30, thereby obtaining an accumulated value S6 that is a count value of the determination result S5 calculated by the count unit 31. After resetting and eliminating the determination result S5 of the noise vibration, the process returns to step SP1 and starts again.

  On the other hand, if a negative result (step SP8: No) is obtained in step SP8, this means that the time of no vibration from the first vibration detection until the next vibration detection is too long. In this case, the process proceeds to the next step SP10.

  In step SP10, the determination unit 32 of the continuity determination unit 30 determines whether or not the cumulative value S6 (the number of determination results S5) from the count unit 31 has reached a predetermined reference value (50 times). Is reached, the vibration detection result S7 indicating that the vibrator vibration of the portable device corresponding to the desired frequency range of 100 Hz to 200 Hz is detected is output to the display means 50, and the process proceeds to the next step SP11.

  In step SP11, the display unit 50 displays a character such as “incoming call” on the display provided on the front panel of the interpolator based on the vibration detection result S7 supplied from the determination unit 32 of the continuity determination unit 30. Alternatively, by performing blinking display or lighting display with a red LED, a notification from the portable device is visually displayed to allow the user to recognize, and then all the processes are terminated.

  As described above, the vibration detection device 1 counts the noise vibration determination result S5 of the continuity determination unit 30 even when the high-frequency noise vibration of 500 Hz is superimposed on the vibrator vibration of the desired detection frequency of 150 Hz. Since the noise vibration determination result S5 can be prevented from being reflected in the accumulated value S6 even when the no-vibration time is long, it can be accurately excluded only from the vibrator vibration with a frequency of 150 Hz. Can be detected.

<Vibrator vibration detection operation when low-frequency noise vibration is mixed>
For example, as shown in FIG. 7, when the desired vibrator vibration to be detected is indicated by a solid line having a frequency of 150 Hz and an amplitude of 2V, the noise vibration superimposed on the vibrator vibration is indicated by an ultrathin line having a frequency of 50 Hz and an amplitude of 1V. In this case, the sensor output signal S2 output via the vibration detection sensor 11 and the amplifier circuit 12 is indicated by a thick line.

  In this case, the falling edge of the binarized output S3a obtained by binarizing the waveform of the sensor output signal S2 based on the threshold voltage sh of −1.5 V is output as the detection signal S3 of the voltage detecting means 21. Vibrator vibrations and noise vibrations that are desired to be detected are such that two wave peaks overlap at one time, and two wave peaks and valleys overlap and cancel each other at a certain time. When the detection signal S3 of the vibrator vibration is detected three times, only the detection signal S3 that is two times less can be detected.

  However, since the time information S4 (period T) indicating the detection interval time between the second detection signal S3 and the third detection signal S3 is not within the reference time range R (5.0 ms to 10.0 ms), The determination result S5 is not output from the comparison unit 23, and is not counted by the counting unit 31 of the continuity determination unit 30. That is, the third, fifth, seventh, and ninth detection signals S3 corresponding to the noise vibration are excluded (NG) from the count target of the counting means 31.

  A vibrator vibration detection operation in the case where the vibrator vibration of the portable device is detected based on the sensor output signal S2 shown in FIG. 7 will be described with reference to the flowchart of FIG.

  In step SP1, the vibration detection apparatus 1 binarizes the sensor output signal S1 based on the threshold voltage sh of −1.5 V by the voltage detection means 21 of the period determination unit 20, and detects the falling edge of the binarized output S3a. It is determined whether it has been completed.

  If a negative result (step SP1: No) is obtained here, the process returns to step SP1 and waits until a falling edge can be detected. If a positive result (step SP1: Yes) is obtained, the falling edge of the binarized output S3a is obtained. After outputting the detection signal S3 indicating that the edge has been detected to the time measuring means 22, the process proceeds to the next step SP2.

  In step SP2, the time measuring means 22 starts measuring the detection interval time, that is, the period T from when the detection signal S3 is supplied until the next detection signal S3 is supplied, and then proceeds to the next step SP3.

  In step SP3, whether or not the voltage detection means 21 has detected the falling edge of the next binarized output S3a while the time measurement means 22 has started timing from the time when the detection signal S3 is supplied. Determine. If a negative result (step SP3: No) is obtained here, the process returns to step SP3 and waits until the voltage detecting means 21 can detect the falling edge of the next binarized output S3a, but the positive result (step SP3: Yes). Is obtained, the detection signal S3 indicating that the falling edge of the next binarized output S3a has been detected is output from the voltage detecting means 21 to the time measuring means 22, and then the process proceeds to the next step SP4.

  In step SP4, the timing means 22 has been supplied with the detection signal S3 indicating that the falling edge of the next binarized output S3a has been detected, so the time from the first detection signal S3 to the next detection signal S3 is received. After measuring the period T and outputting the time information S4 of the period T to the comparison means 23, the process proceeds to the next step SP5.

  In step SP5, the comparison means 23 determines whether or not the time information S4 (cycle T) is within a preset reference time range R (5.0 ms to 10.0 ms). If a negative result (step SP5: No) is obtained here, this means that the time information S4 (cycle T) is not within the reference time range R (5.0 ms to 10.0 ms). T) indicates that it is not the vibration vibration period T of the desired frequency band of 100 Hz to 200 Hz. At this time, without returning the determination result S5, the process returns to step SP1 to detect the next detection signal S3. The timing of the period T is started from the time point.

  Thus, when the time information S4 of the period T from the time point of the first detection signal S3 to the next detection signal S3 is not within the reference time range R (5.0 ms to 10.0 ms), the next detection signal S3. Is not based on the period T of the vibrator vibration in the desired frequency band of 100 Hz to 200 Hz (“NG”). Accordingly, at this time, the determination result S5 is not output from the comparison means 23. Thereby, it is possible to exclude in advance that the determination result S5 of the noise vibration is reflected in the count value by the counting means 31 of the continuity determination unit 30.

  On the other hand, if an affirmative result (step SP5: Yes) is obtained in step SP5, this is because the time information S4 (cycle T) is within the reference time range R (5.0 ms to 10.0 ms). The next detection signal S3 is based on the vibrator vibration period T in the desired frequency band of 100 Hz to 200 Hz. Accordingly, at this time, the comparison unit 23 outputs the determination result S5 to the counting unit 31 of the continuity determination unit 30 and the non-vibration timing unit 41 of the reset unit 40.

  Specifically, as shown in FIG. 7, the detection signal S3 of the first, third, fifth, seventh, ninth,... Is a vibrator vibration cycle, for example, the third detection signal S3. Since the time information S4 (period T) at the time when is detected is not within the reference time range R (5.0 ms to 10.0 ms), it is considered to be a period of noise vibration, so the determination result S5 at that time Is not output from the comparison means 23.

  That is, since it is considered that only the second, fourth, sixth, eighth, tenth,... Detection signal S3 is based on the period T of the vibrator vibration, the determination result S5 at that time is the comparison means 23. And is calculated by the counting means 31 of the continuity determination unit 30.

  Also in this case, the reason why the detection signal S3 when the falling edge of the first binarized output S3a is detected is (NG) is that the detection signal S3 from the previous detection signal to the first detection signal S3. This is because it cannot be determined whether or not the time information S4 is within the reference time range R (5.0 ms to 10.0 ms). Therefore, the first detection signal S3 is excluded from the calculation target of the counting means 31.

  In step SP6, the counting unit 31 of the continuity determining unit 30 sets “1” to the current count number in order to calculate the determination result S5 of the vibrator vibration period T output from the comparing unit 23. Add and move to next step SP9.

  At the same time, at step SP7, the no-vibration timing means 41 of the reset unit 40 starts the no-vibration timing operation from the time when the determination result S5 of the vibration period T of the vibrator vibration that is desired to be detected is received. Move on.

  In step SP8, the no-vibration timing means 41 has a predetermined no-vibration counting time until the next determination result S5 is supplied after the determination result S5 is determined to be the period T of the vibrator vibration. It is determined whether or not the vibration-free allowable time of 50 ms is exceeded.

  If an affirmative result (step SP8: Yes) is obtained here, this indicates that there is a possibility that the determination result S5 is a noise vibration because the measurement time of no vibration exceeds the no-vibration allowable time of 50 ms. This means that the value is high. At this time, the process proceeds to the next step SP9.

  In step SP9, the count clear unit 42 outputs a count clear command S9 to the count unit 31 of the continuity determination unit 30, thereby obtaining an accumulated value S6 that is a count value of the determination result S5 calculated by the count unit 31. After resetting and eliminating the determination result S5 of the noise vibration, the process returns to step SP1 and starts again.

  On the other hand, if a negative result (step SP8: No) is obtained in step SP8, this means that the time of no vibration from the first vibration detection until the next vibration detection is too long. In this case, the process proceeds to the next step SP10.

  On the other hand, if a negative result (step SP8: No) is obtained in step SP8, this means that the time for measuring no vibration does not exceed 50 ms which is the allowable time for no vibration. Move on.

  In step SP10, the determination unit 32 of the continuity determination unit 30 determines whether or not the cumulative value S6 (the number of determination results S5) from the count unit 31 has reached a predetermined reference value (50 times). Is reached, the vibration detection result S7 indicating that the vibrator vibration of the portable device corresponding to the desired frequency range of 100 Hz to 200 Hz is detected is output to the display means 50, and the process proceeds to the next step SP11.

  In step SP11, the display unit 50 displays a character such as “incoming call” on the display provided on the front panel of the interpolator based on the vibration detection result S7 supplied from the determination unit 32 of the continuity determination unit 30. Alternatively, by performing blinking display or lighting display with a red LED, a notification from the portable device is visually displayed to allow the user to recognize, and then all the processes are terminated.

  By the way, when a low-frequency noise vibration with a frequency of 50 Hz is superimposed on a vibrator vibration with a desired detection frequency of 150 Hz, the amplitude of the vibrator vibration is, for example, between the second detection signal S3 and the third detection signal S3. As a result of cancellation by noise vibration, there is a sensor output signal S2 that does not exceed the threshold voltage sh. Therefore, when the vibration vibration detection signal S3 is detected three times within a certain time range, only the detection signal S3 that is two times less can be detected.

  However, as long as the measurement time of no vibration between the second detection signal S3 and the fourth detection signal S3 from which the determination result S5 from the comparison unit 23 is obtained does not exceed 50 ms which is the no-vibration allowable time, 2 The fourth, sixth, eighth, tenth,... Detection signals S3 are considered to be based on the period T of the vibrator vibration.

  Accordingly, the determination result S5 when the detection signal S3 based on the vibration vibration period T is obtained is calculated by the counting means 31 of the continuity determination unit 30 and is output to the determination means 32 as the accumulated value S6. The accumulated value S6 of 31 is not reset, and although it takes time as compared with the case where high-frequency noise vibration is superimposed, vibrator vibration having a frequency of 150 Hz can be accurately detected.

<Other embodiments>
In the above-described embodiment, when the sensor output signal S2 falls, the voltage detection unit 21 outputs the detection signal S3 when it is detected that a preset threshold voltage sh (for example, −1.5 V) has been crossed. Although the case of outputting is described, the present invention is not limited to this. When the sensor output signal S2 rises, voltage detection is performed when it is detected that a preset threshold voltage sh (for example, +1.5 V) is crossed. The means 21 may output the detection signal S3.

  In the above-described embodiment, the case where the cumulative value S6 of the counting means 31 of the continuity determining unit 30 is reset according to the count clear command S9 from the count clearing means 42 has been described. However, the accumulated value S6 of the counting means 31 may be reset in accordance with a count clear command from another count clearing means (not shown). As a result, after detecting once that the vibration is desired to be detected, the vibration value can be newly detected by resetting the cumulative value S6.

  Furthermore, in the above-described embodiment, the case where the vibration of the portable device is set as the detection target has been described. However, the present invention is not limited to this, and the frequency can be determined by measuring the period T. If possible, the detection target is not limited to vibration, and sound may be detected.

  Further, in the above-described embodiment, the determination result S5 supplied from the comparison unit 23 is counted (calculated) by the counter unit 31 as the calculation unit, and the accumulated value S6 that is the calculation result of the determination result S5 is determined. The case of outputting to 32 has been described. However, the present invention is not limited to this. When it is determined that the time information S4 (cycle T) supplied from the time measuring means 22 is within the reference time range R, the present invention is not limited to the counting means 31. When the accumulated time of the time information S4 (cycle T) is calculated by the adder circuit and the accumulated time reaches a predetermined reference time (for example, 5 ms × 50 = 250 ms), the detection target frequency range corresponds to 100 Hz to 200 Hz. You may make it output the vibration detection result S7 showing having detected the vibrator vibration of a portable apparatus to the display means 50. FIG. In this case, instead of the count clear means 42, an accumulated value clear means for resetting the accumulated time may be provided.

  DESCRIPTION OF SYMBOLS 1 ... Vibration detection apparatus, 11 ... Vibration detection sensor (vibration detection means), 12 ... Amplifier circuit, 20 ... Period determination part, 21 ... Voltage detection means, 22 ... Time measuring means, 23 ... Comparison means, 30 ... Continuity judgment part , 31 ... count means (calculation means), 32 ... determination means, 40 ... reset unit, 41 ... non-vibration timing means, 42 ... count clear means (cumulative value clear means), 50 ... display means.

Claims (3)

Voltage detection means for detecting the output voltage detected by the vibration detection means based on a predetermined threshold voltage;
Time measuring means for measuring a detection interval time from when the output voltage is detected based on the threshold voltage by the voltage detecting means until the next time the output voltage is detected based on the threshold voltage,
A comparison unit that outputs a determination result that the detection interval time is a vibration period of a desired frequency when it is determined that the detection interval time measured by the time measuring unit is within a preset reference time range; ,
A calculation means for calculating the determination result output by the comparison means;
Determination means for determining that vibration of the desired frequency is detected based on a cumulative value of the determination results calculated by the calculation means ,
It said voltage detection means, when one of a predetermined one of the falling and rising of the output voltage has crossed the predetermined threshold voltage, the vibration detecting device, wherein that you detect the output voltage. No-vibration timing for measuring the no-vibration time from the time when the comparison interval is determined to be within the reference time range until the next time the output voltage is detected based on the threshold voltage. Means,
And further comprising: cumulative value clearing means for clearing the cumulative value calculated by the calculating means when the no-vibration time measured by the non-vibration timing means is longer than a predetermined no-vibration allowable time. The vibration detection device according to claim 1. The vibration detection apparatus according to claim 1, further comprising display means for visually displaying that the vibration is detected by the determination means.

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