JP2015232488A - Sound wave alarm system and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure the fitting angle of an ultrasonic sensor regardless of usage.SOLUTION: A sound wave alarm system includes: receiving means 120 configured to receive a sound wave emitted from a sound wave sensor 510 under a state in which a sound wave measurement sensor is carried on the sensor shaft of the sound wave sensor 510 assumed to be mounted on a vehicle body 500 with an ideal angle as a measurement system of the fitting angle of a sound wave sensor; measuring means 300 configured to measure intensity of the frequency of the sound wave received by the receiving means 120; and notification means 400 configured to notify intensity measured by the measuring means 300.

Description

  The present invention relates to a sound wave notification system and method, and in particular, notifies by displaying an output of a sound wave sensor such as an ultrasonic sensor attached to a vehicle such as an automobile or a sound wave sensor for confirming whether or not an electronic component such as a capacitor is connected to a substrate. The present invention relates to a sound wave notification system and method.

  Patent Document 1 discloses a method for quantitatively and simply measuring an attachment angle of a sensor shaft of a sound wave sensor with respect to an attachment reference direction to a vehicle body. This method measures the vertical inclination with respect to the reference mounting direction of the ultrasonic sensor using a pseudo road surface member, and measures the horizontal tilt with respect to the reference mounting direction of the ultrasonic sensor using a symmetrical measurement target. Step.

Patent Document 2 discloses an electronic component that can suppress noise caused by electrostrictive vibration. This electronic component has four end surfaces and four side surfaces that connect the end surfaces, and an internal electrode that is exposed on the end surface is disposed. And a terminal electrode disposed on the end face side of the element body, and the terminal electrode is continuously disposed across the end face of the element body and at least one side surface of the four side surfaces to form an internal electrode. And a plating layer disposed on the baking layer disposed on one side surface, and an insulating portion is disposed to cover the baking layer disposed on the end surface of the element body.
JP 2010-286417 A JP 2014-036149

  However, the method described in Patent Document 1 is intended to assist parking operation. For this reason, the inclination of the vertical direction with respect to the reference mounting direction of the ultrasonic sensor is measured using a pseudo road member. .

  According to this measurement, for example, when an ultrasonic sensor is used to prevent a collision with a car in front, the distance from the car to the road and the distance from the car to the car in front of the car are greatly different. The above measurement may not be sufficient.

  In addition, although the method described in Patent Document 2 contributes to suppression of noise caused by electrostrictive vibration, the so-called sound is generated based on the electrostrictive vibration of the electronic component when the electronic component connected to the substrate is in operation. The possibility of squealing is not completely eliminated, and the electrostrictive vibration may cause cracks in the solder connecting the electronic component and the substrate, or in the electronic component itself.

  If the sound produced by an electronic component is a sound in the human audible frequency band, humans can theoretically recognize it by hearing, but the sound produced by sounding is so small that it must always be identified by hearing. Is not easy. In addition, it is necessary to grasp the electrostrictive vibration state in order to prevent cracks from occurring.

  Therefore, an object of the present invention is to make a notification by, for example, displaying an output of an acoustic sensor such as an ultrasonic sensor attached to a vehicle such as an automobile, an acoustic sensor for confirming whether or not an electronic component such as a capacitor is connected to a substrate.

In order to solve the above problems, the sound wave notification system of the present invention is
Receiving means for receiving sound waves emitted from a sound wave generation source;
Measuring means for measuring the intensity of the frequency of the sound wave received by the receiving means;
Informing means for informing the intensity measured by the measuring means;
Is provided.

  Note that the number of sound wave measuring sensors of the receiving means may be one or more. When there is one sound wave measuring sensor, when the sound waves are received after being transported on the sensor shaft when a plurality of sound wave sensors are attached to the vehicle body at ideal attachment angles, respectively. Good. On the other hand, when there are a plurality of sound wave measuring sensors, the sound waves may be received by the sound wave measuring sensors located on the sensor axis when the plurality of sound wave sensors are each attached at an ideal angle.

In addition, the sound wave notification method of the present invention,
Receiving sound waves emitted from a sound wave source;
Measuring the intensity of the frequency of the sound wave;
Informing the intensity;
including.

  According to the present invention, the intensity of the frequency of the sound wave emitted from the sound wave sensor when the mounting angle with respect to the vehicle is ideal is compared with the intensity of the frequency of the sound wave actually emitted from the sound wave sensor attached to the vehicle. By doing so, it is possible to confirm how much deviation occurs with respect to the ideal angle of attachment of the sound wave sensor.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram of a measurement system for a mounting angle of a sound wave sensor, which is an example of a sound wave notification system according to a first embodiment of the present invention.

  As shown in FIG. 1, the measurement system for the attachment angle of the acoustic wave sensor according to the present embodiment is required for the measurement apparatus 100 for measuring the attachment angle of the ultrasonic sensor that is the acoustic wave sensor, and the measurement apparatus 100. A control device 200 that inputs a signal indicating an ultrasonic wave output from the measurement device 100 and a measurement device 300 such as a spectrum analyzer that measures the intensity of the ultrasonic wave from the signal input by the control device 200; The computer 400 is a notifying unit that processes and notifies the measurement result measured by the measuring device 300.

  FIG. 1 also shows an automobile 500 as a vehicle to which the ultrasonic sensor 510 is attached. In general, the ultrasonic sensors 510 are often attached in a total of about 4 to 10 in the vicinity of the four corners and the center of each bumper in front and rear of the automobile 500.

  These ultrasonic sensors 510 include a transmitting unit that emits ultrasonic waves of a predetermined frequency and a receiving unit that receives ultrasonic waves corresponding to the frequencies. If there is an obstacle in the vicinity of the ultrasonic sensor 510, the ultrasonic wave emitted from the transmitter is reflected by the obstacle and received by the receiver. Therefore, when an ultrasonic wave is received by the receiving unit, an alert sound can be output to the driver of the automobile 500 or the automobile 500 can be braked to prevent collision with the obstacle. .

  Further, the measuring apparatus 100 includes a carriage 110, a receiving unit 120, an arm unit 130, a position adjustment stage unit 140, a Z-axis rail unit 150, a driving unit 160, and a control unit 170, which will be described below. Prepare.

  The carriage 110 is for moving the measuring apparatus 100 to a required position such as the front and rear of the automobile 500 when measuring the mounting angle of the ultrasonic sensor 510. A position adjustment stage 140 or the like is mounted on the shape part of the carriage 110, and wheels for moving the carriage 110 itself are provided at the bottom of the carriage 110.

  The receiving means 120 receives sound waves emitted from the ultrasonic sensor 510 attached to the automobile 500. The receiving means 120 according to the present embodiment has one acoustic wave measurement sensor. This sound wave measurement sensor is tuned to the frequency of the ultrasonic wave emitted from the ultrasonic sensor 510 and can receive the ultrasonic wave. As an example, the sensor for sound wave measurement can be the same as the receiving unit of the ultrasonic sensor 510.

  As shown in FIG. 1, the arm portion 130 has a first portion that is connected to the Z-axis rail portion 150 and extends in the horizontal direction, a second portion that extends vertically downward from the other end of the first portion, It has an L-shaped outline including a third portion that slightly protrudes in the horizontal direction from the lower end of the second portion. The receiving means 120 described above is attached to the tip of the third portion of the arm portion 130.

  The position adjustment stage unit 140 is for moving the arm unit 130 in three axial directions such as the XYZ directions in order to align the receiving unit 120. As described above, since a plurality of ultrasonic sensors 510 are usually attached to the automobile 500, in order to move the arm part 130 in accordance with each of the attachment positions, the position adjustment stage part 140 is provided. Are connected in such a manner that the Z-axis rail portion 150 and the like are movable.

  The Z-axis rail part 150 connects the position adjustment stage part 140 and the arm part 130, and is mainly for moving the arm part 130 in the Z-axis direction. Although not shown in FIG. 1, the measuring apparatus 100 is also provided with an X-axis rail portion and a Y-axis rail portion for moving the arm portion 130 in the X-axis direction and the Y-axis direction, respectively. The Z-axis rail portion 150 and the like can move the arm portion 130 so as to be positioned on the sensor axis of each sound wave sensor 510 attached to the automobile 500 at an ideal angle.

  The drive unit 160 constitutes a so-called triaxial robot together with the position adjustment stage unit 140 and the like. The drive unit 160 includes a motor that moves the X-axis rail unit and the Y-axis rail unit to a predetermined position, a motor that moves the arm unit 130 to a predetermined position on the Z-axis rail unit 150, and the like.

  The control unit 170 is connected to the receiving unit 120 and the driving unit 160, and mainly outputs an instruction to the driving unit 160 in accordance with a command from the control device 200 or a signal based on the ultrasonic wave received by the receiving unit 120. Is controlled to various control such as outputting to the control device 200.

  Here, as described above, a plurality of ultrasonic sensors 510 are usually attached to the automobile 500. In addition, there are several types and types of automobiles 500. For this reason, the mounting position of the ultrasonic sensor 510 varies depending on the automobile 500. Therefore, the position of the arm unit 130 cannot be determined uniquely.

  Therefore, in the present embodiment, information on the mounting position of the ultrasonic sensor 510 is registered in the control device 200 for each vehicle type so that the mounting angle of the ultrasonic sensor mounted on the various vehicles 500 can be confirmed. is there. For the registered automobile 500, the control unit 170 is instructed to move the receiving means 120 on the sensor axis of the sound wave sensor 510 attached at an ideal angle.

  Next, the operation of the measurement system for the mounting angle of the sound wave sensor shown in FIG. 1 will be described. First, the carriage 110 is moved, and the measuring apparatus 100 is transported from the automobile 500 to which the sonic sensor whose attachment angle is to be measured to the front of a location that is, for example, about 0.5 m to 2.0 m away. Actually, the carriage 110 can be transported to the front of the automobile 500 by providing a positioning guide for the carriage 110 on the inspection line of the automobile 500.

  Thereafter, the control device 200 issues a position control command for the arm unit 130 according to the type of the automobile 500 to the measurement device 100. As a result, in the measuring apparatus 100, the control unit 170 outputs a position control instruction for the arm unit 130 to the drive unit 160 in accordance with the position control command from the control device 200.

  The drive unit 160 is a first acoustic wave sensor when the X-axis rail unit and the like on the position adjustment stage unit 140 are attached to the automobile 500 at an ideal angle in accordance with an instruction from the control unit 170. The arm unit 130 is moved so that the sound wave measurement sensor of the receiving means 120 is positioned on the sensor axis 510. Here, the sensor axis refers to the axis of the transmission part of the sound wave sensor 510, and when viewed microscopically, means the center of the transmission surface of the ultrasonic wave from the transmission part.

  When the position control of the arm unit 130 is completed, a signal to that effect is output from the drive unit 160 to the control unit 170. When the signal from the drive unit 160 is input, the control unit 170 issues a position control completion report to the control device 200.

  Next, the control device 200 outputs a command to turn on the receiving unit 120 to the measurement device 100. In the measuring apparatus 100, upon receiving this command, the control unit 170 turns on the receiving means 120.

  When the ultrasonic sensor 510 of the automobile 500 is turned on in this state, ultrasonic waves are emitted from the ultrasonic sensor 510. At this time, if the first acoustic wave sensor 510 is an ideal mounting angle with respect to the automobile 500, the intensity of the ultrasonic wave received by the receiving means 120 becomes the maximum value, and the amount of deviation of this angle increases. The intensity of the ultrasonic wave received by the receiving means 120 will decrease.

  When receiving the ultrasonic wave emitted from the ultrasonic sensor 510, the receiving unit 120 outputs a signal indicating the ultrasonic wave to the control unit 170. When the signal from the receiving unit 120 is input, the control unit 170 outputs the signal to the control device 200.

  When the control device 200 receives a signal from the control unit 170, the control device 200 outputs the signal to the measurement device 300 and measures the mounting angle of the second ultrasonic sensor 510 that is the next measurement target. A position control command is output to 100.

  The measurement apparatus 300 measures the intensity of the frequency of the ultrasonic wave emitted from the ultrasonic sensor 510 based on the signal output from the control apparatus 200 and outputs the measurement result to the computer 400. Thereafter, the above operation is repeated until the measurement of the attachment angles of all the ultrasonic sensors 510 attached to the automobile 500 is completed.

  When the computer 400 inputs the measurement result measured by the measurement device 300, the computer 400 sequentially inputs the input measurement result to a memory (not shown) or the like until receiving a report that the measurement of the mounting angles of all the ultrasonic sensors 510 is completed. Store it.

  After that, when the computer 400 receives a report that the measurement of the mounting angles of all the ultrasonic sensors 510 has been completed, the computer 400 can visualize the measurement results using a program for performing processing such as displaying a graph. Output to the display.

  The contents to be output to the display may include, for example, the contents shown in FIG. As a result, the measurement result in the measurement apparatus 100 is displayed on the display connected to the computer 400. In addition, in order to perform measurement with high reliability, the above measurement may be performed a plurality of times by changing the distance between the measurement apparatus 100 and the automobile 500.

  As a result of the above measurement, it is possible to confirm whether or not there is a deviation in the mounting angle of the ultrasonic sensor 510. If there is a deviation in the mounting angle of any of the ultrasonic sensors 510, The mounting angle of the ultrasonic sensor 510 can be corrected.

  FIG. 2 is a diagram showing a relationship between the distance between the receiving unit 120 and the specific ultrasonic sensor 510 shown in FIG. 1 and ultrasonic waves. In FIG. 2, the horizontal axis indicates the distance [cm], and the vertical axis indicates the intensity [dBm].

  As shown in FIG. 2, it can be seen that the intensity of the ultrasonic wave decreases as the distance between the receiving unit 120 and the ultrasonic sensor 510 increases. This is considered to be due to the diffusion of ultrasonic waves. According to FIG. 2, an increase in intensity is observed between 60 [cm] and 80 [cm] and in the vicinity of 100 [cm]. This is a measurement error or an ultrasonic wave emitted from the adjacent ultrasonic sensor 510. Probably due to receipt.

  In addition, according to FIG. 2, it can be said that the distance between the receiving unit 120 and the ultrasonic sensor 510 should be short if ultrasonic waves can be measured with high accuracy. On the other hand, if not, it would be better to change the distance and measure several times as described above.

  FIG. 3 shows the ultrasonic intensity when the receiving means 120 is moved in the horizontal direction on a plane set at a distance of 50 [cm] from the front of the receiving means 120 and the specific ultrasonic sensor 510 shown in FIG. FIG. In FIG. 2, the horizontal axis indicates the distance [cm], and the vertical axis indicates the intensity [dBm].

  As shown in FIG. 3, it can be seen that substantially symmetrical intensity is obtained about the vertical axis. The intensity peak was obtained at a position shifted about 5 cm to the right from the vertical axis. This is expected that the sensor axis of the specific ultrasonic sensor 510 is slightly inclined toward the right side.

  However, it should be noted that this slope does not mean that it is generally bad. That is, the direction of the sensor axis differs depending on where the ultrasonic sensor 510 is attached to the automobile 500, and therefore the attachment angle of the ultrasonic sensor 510 must be corrected with the measurement results shown in FIG. Absent.

  In this embodiment, the measurement system of the attachment angle of the sound wave sensor, which is an example of the sound wave notification system, has been described as an example. However, in addition to this, the accuracy of the ultrasonic radiation angle of the ultrasonic sensor 510 itself is high. It should be noted that the ultrasonic sensor 510 does not necessarily have to be attached to the automobile 500 because it can be visualized whether or not it is necessary.

(Embodiment 2)
FIG. 4 is a plan view showing a schematic configuration of the receiving surface of the receiving unit 120 according to the second embodiment of the present invention. The receiving unit 120 described in the first embodiment is premised on having only one acoustic wave measurement sensor, but in the present embodiment, it is premised on the case of having two or more acoustic wave measurement sensors.

  FIG. 4 shows a receiving means 120 in which a plurality of sound wave measurement sensors 120A are arranged on a panel. Here, for example, 32 acoustic wave measuring sensors 120A are shown arranged at equal intervals. However, as long as a wide range of vehicles 500 of various types and types can be supported, there are more than this. Alternatively, a small number of acoustic wave measurement sensors 120A may be arranged, and the acoustic wave measurement sensors 120A are not necessarily arranged at regular intervals.

  When using the receiving means 120 in which a plurality of acoustic wave measurement sensors 120A are arranged in this way, the plurality of ultrasonic sensors 510 attached to the automobile 500 are each attached at an ideal angle. Then, the sound wave from each sound wave sensor 510 may be received by each sound wave measurement sensor 120A located on the sensor axis of each sound wave sensor.

  4 can be mounted on the carriage 210 as in the case of the first embodiment, instead, for example, the receiving means 120 on the inspection line of the automobile 500 is used. Can also be incorporated.

  Specifically, for example, the receiving means 120 is positioned at the upper part of the line when the automobile 500 is transported, and the automobile 500 is transported to the front side of the receiving means 120 when the automobile 500 is inspected. 120 may be lowered to measure the mounting angle of the ultrasonic sensor 510 and then the receiving means 120 may be raised.

  When the receiving unit 120 is incorporated on the line, the sound wave measuring sensors 120A may be arranged on both sides of the panel of the receiving unit 120. In this case, for example, the mounting angle of the ultrasonic sensor 510 mounted in front of the automobile 500 is measured by the acoustic wave measuring sensor 120A arranged on the panel surface, and then the receiving unit 120 is raised once. Then, after the automobile 500 is advanced on the line, the receiving means 120 is lowered again, and the mounting angle of the ultrasonic sensor 510 attached to the rear of the automobile 500 is measured by the sound wave measurement arranged on the back surface of the panel. It is possible to measure using the sensor 120 </ b> A and to measure the attachment angle of the ultrasonic sensor 510 attached to the front of the automobile located behind the automobile 500.

  In other words, based on the receiving means 120 once lowered, the mounting angle of the ultrasonic sensor 510 mounted in front of the (n + 1) th automobile 500 is measured by the front surface acoustic wave measurement sensor 120A and the back surface The mounting angle of the ultrasonic sensor 510 attached to the rear of the previous n-th automobile 500 located in front of the (n + 1) th automobile 500 can be measured by the side acoustic wave measurement sensor 120A. This has the advantage that the throughput during line inspection is not reduced.

(Other embodiments)
As another embodiment, for example, by positioning a sound wave sensor capable of acquiring a sound of about 0 Hz to 100 KHz around the substrate with an electronic component such as a multilayer ceramic capacitor connected to the substrate, Visualizing sound waves based on electrostrictive vibration of electronic components will be described.

  That is, in another embodiment, in order to visually recognize electrostrictive vibration that causes noise and cracks, first, the electronic component is connected to the substrate and then the electronic component is turned on. A sound wave based on electrostrictive vibration is measured around the periphery by the measuring device 100.

  Then, the position of the measuring apparatus 100 is controlled by a method similar to the method described in the first embodiment and the measurement of the generated sound based on the electrostrictive vibration of all the electronic components attached to the substrate is completed. Until the above operation is repeated.

  After that, when the computer 400 receives a report that the measurement of the generated sound based on the electrostrictive vibration of all the electronic components has been completed, the computer 400 can visualize the measurement result using a program for performing processing such as displaying a graph. After that, output to the display.

  FIG. 5 is a diagram illustrating a display example of a display according to another embodiment. FIG. 5 shows a display area A of the captured image of the substrate, and an image display area B in which the intensity of the sound wave based on the electrostrictive vibration of the capacitor included in the captured image displayed in the display area A is indicated by contour lines. And a data display area C for creating a captured image displayed in the display area B are displayed.

  FIG. 5 also shows a state in which the image shown in the display area B is superimposed and displayed on the capacitor shown in the display area A, as shown in the ellipse D. In addition, on the upper side of the display areas A and B, an area indicating that the sound of the condenser is being measured, measurement date information, and various information is also shown.

  In the display area C, for example, the relationship between the position of the substrate and the intensity of sound waves of the condenser in the frequency band of 0.3 MHz is shown. In the display example shown in FIG. 5, typically, the measurement of the generated sound based on the electrostrictive vibration is finished for all the electronic components attached to the board, and as a result, the squeal is recognized in a specific capacitor. Is displayed when

  For this reason, in the display area A, the vicinity of the capacitor mounting position is enlarged and displayed for the captured image of the substrate. In addition, as shown by an ellipse D, by superimposing and displaying an image, it is easy to specify which part of the capacitor is a sound generation source. Also, by showing the intensity of sound waves with contour lines as in the image shown in the display area B, for example, for those with very strong sound wave intensity, it should be a guideline such as mounting the capacitor or replacing the capacitor itself. Can do.

It is a typical block diagram of the measuring system of the attachment angle of the sound wave sensor which is an example of the sound wave alerting | reporting system of Embodiment 1 of this invention. It is a figure which shows the relationship between the distance of the receiving means 120 shown in FIG. 1, and the specific ultrasonic sensor 510, and an ultrasonic wave. It is a figure which shows the intensity | strength of an ultrasonic wave when the receiving means 120 is moved to a horizontal direction on the plane made into the distance of 50 [cm] from the front of the receiving means 120 and the specific ultrasonic sensor 510 shown in FIG. It is a top view which shows the typical structure of the receiving surface of the receiving means 120 which concerns on Embodiment 2 of this invention. It is a figure which shows the example of a display of the display which concerns on other embodiment.

DESCRIPTION OF SYMBOLS 100 Measuring apparatus 110 Carriage 120 Reception means 130 Arm part 140 Position adjustment stage part 150 Z-axis rail part 160 Drive part 170 Control part 200 Control apparatus 300 Measuring apparatus 400 Computer

Claims (6)

Receiving means for receiving sound waves emitted from a sound wave generation source;
Measuring means for measuring the intensity of the frequency of the sound wave received by the receiving means;
Informing means for informing the intensity measured by the measuring means;
A sound wave notification system comprising:   The sound wave notification system according to claim 1, wherein the reception unit includes one or more sound wave measurement sensors.   The receiving means receives a sound wave emitted from the sound wave sensor in a state where the sound wave measuring sensor is conveyed on the sensor axis of the sound wave sensor when it is attached to the vehicle body at an ideal angle. The sound wave notification system according to claim 1.   The sound wave notification system according to claim 1, wherein the receiving means has sound wave measurement sensors arranged on both sides of the panel.   The sound wave notification system according to claim 1, wherein the receiving unit receives sound waves based on electrostrictive vibration generated in a state where an electronic component attached to the substrate is operated. Receiving sound waves emitted from a sound wave source;
Measuring the intensity of the frequency of the sound wave;
Informing the intensity;
A sound wave notification method including: