CN108983018B - Capacitor squeal detection method, system, readable storage medium and device - Google Patents
Capacitor squeal detection method, system, readable storage medium and device Download PDFInfo
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Abstract
The invention discloses a method, a system, a readable storage medium and a device for detecting capacitor squeal, wherein the method comprises the following steps: acquiring an electric signal generated by a piezoelectric sensor; and when the frequency of the electric signal is within a preset frequency range and the power of the electric signal is greater than a power threshold value, judging that the capacitor to be tested generates squeaking. The invention has the following advantages: the circuit judgment is used for replacing the subjective judgment of human ears, so that the misjudgment caused by different individual hearing conditions is eliminated; the PCB circuit does not need to be damaged in the detection process; mechanical vibration is converted into an electronic signal, so that a mature circuit can be adopted for working, and the operation is reliable and stable; no special audio environment is required, and accurate detection can be achieved even in a noisy environment.
Description
Technical Field
The invention belongs to the technical field of circuit detection, and particularly relates to a capacitor squeal detection method, a system, a readable storage medium and a device.
Background
The layered capacitor is a commonly used electronic device, and the MLCC layered capacitor is widely used due to its small size and low parasitic inductance. The MLCC is made of ceramic, the ceramic has electrostrictive effect, also called piezoelectric effect, as shown in fig. 1, when an alternating voltage is applied to the layer capacitor, the layer capacitor will expand and contract in the stacking direction, as shown in fig. 1, the layer capacitor will expand and contract in the direction perpendicular to the stacking direction, i.e. in the direction parallel to the circuit board, because the layer capacitor is soldered on the circuit board by using solder, rigid connection, the deformation caused by the expansion and contraction of the layer capacitor will cause the circuit board to bend, as a result, the surface of the circuit board will vibrate, and when the vibration frequency is within the audible frequency range (20 Hz-20 kHz) of a person, the person will hear the squeaking sound of "squeaking". For electronic products, especially consumer electronic products with audio, such as mobile phones, such sound can be directly heard by users, which results in reduced product performance and impaired user experience.
In order to improve user experience, audio electronic products such as mobile phones and the like need to eliminate the whistling of the layered capacitor. To eliminate howling, it is necessary to find out which layer capacitor causes howling first, and then the subsequent processing can be performed. For whether a certain layer capacitor is howling or not, the existing howling diagnosis method generally adopts the auditory sense of human ears to carry out subjective judgment or adopts a hearing auxiliary tool. However, the above-mentioned diagnostic method has a high requirement for the diagnostic environment in the diagnostic process, and the position of the capacitor with howling cannot be accurately determined by the existing method, and the circuit structure may be damaged in the detection process, and the detection efficiency is low, and erroneous determination is easy to occur.
Disclosure of Invention
The invention provides the following technical scheme for solving the defects:
a capacitor squeal detection method is applied to a capacitor squeal detection device, the capacitor squeal detection device comprises a piezoelectric sensor, when a capacitor to be detected is detected, the piezoelectric sensor is attached to the capacitor to be detected, and the method comprises the following steps: acquiring an electric signal generated by the piezoelectric sensor, wherein the electric signal is converted by the piezoelectric sensor at the same frequency according to a vibration signal generated by electrostriction of the capacitor to be detected; and when the frequency of the electric signal is within a preset frequency range and the power of the electric signal is greater than a power threshold value, judging that the capacitor to be tested generates howling.
Wherein after the step of acquiring the electrical signal generated by the piezoelectric sensor, the method further comprises: optimizing the electrical signal; wherein the optimization includes at least amplifying the power of the electrical signal.
Wherein after the step of acquiring the electrical signal generated by the piezoelectric sensor, the method further comprises: acquiring the frequency value of the electric signal and acquiring the power value of the electric signal; judging whether the frequency of the electric signal is within the preset frequency range, and sending a high level signal when the frequency of the electric signal is within the preset frequency range, otherwise sending a low level signal; and judging whether the power of the electric signal is greater than the power threshold value, and sending a high level signal when the power of the electric signal is greater than the power threshold value, otherwise sending a low level signal.
After the step of determining that the capacitor to be tested generates howling, the method further includes: and sending an alarm signal to prompt a user that the capacitor to be tested has squeaking.
The alarm signal is sent out by a light alarm and a buzzer alarm.
Wherein the preset frequency range of the electric signal is 20Hz-20000 Hz.
The invention provides the following technical scheme for solving the defects:
a capacitor squeal detection system is applied to a capacitor squeal detection device, the capacitor squeal detection device comprises a piezoelectric sensor, when a capacitor to be detected is detected, the piezoelectric sensor is attached to the capacitor to be detected, and the system comprises: the signal acquisition module is used for acquiring an electric signal generated by the piezoelectric sensor, and the electric signal is converted by the piezoelectric sensor at the same frequency according to a vibration signal generated by electrostriction of the capacitor to be detected; and the howling judgment module is used for judging that the capacitor to be tested generates howling when the frequency of the electric signal is within a preset range and the power of the electric signal is greater than a threshold value.
The invention provides the following technical scheme for solving the defects:
a computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out a capacitive howling detection method as previously described.
The invention provides the following technical scheme for solving the defects:
a capacitive squeal detection apparatus comprising: the squeal-containing detection device comprises two clamping arms and piezoelectric sensors, the tops of the two clamping arms are pivoted, the piezoelectric sensors are arranged on the inner side of the bottom end of one of the clamping arms, the squeal-containing detection device further comprises a memory, a processor and a computer program which is stored in the memory and can run on the processor, and the processor realizes the capacitor squeal detection method when executing the program.
The device further comprises an adjusting screw rod, a rotating adjusting element is arranged in the middle of the adjusting screw rod, screw holes are formed in the corresponding positions of the two clamping arms, and the two ends of the adjusting screw rod are in threaded connection with the screw holes respectively.
Wherein, the bottom inboard of pressing from both sides tight arm all is equipped with a flexible pad, piezoelectric sensor locates one of them flexible pad faces another on the surface of flexible pad.
The capacitor squeal detection device further comprises a light alarm and a buzzer alarm.
Compared with the prior art, the capacitor howling detection method, the capacitor howling detection system, the readable storage medium and the capacitor howling detection device provided by the invention have the following advantages: the circuit judgment is used for replacing the subjective judgment of human ears, so that the misjudgment caused by different individual hearing conditions is eliminated; the PCB circuit does not need to be damaged in the detection process; mechanical vibration is converted into an electronic signal, so that a mature circuit can be adopted for working, and the operation is reliable and stable; no special audio environment is required, and accurate detection can be achieved even in a noisy environment.
Drawings
Fig. 1 is a schematic diagram illustrating the generation of piezoelectric effect in the prior art.
FIG. 2 is a flowchart illustrating a method for detecting capacitive howling according to a first embodiment of the present invention;
FIG. 3 is a flowchart illustrating a method for capacitive howling detection according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a capacitive howling detection system according to a third embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a capacitive howling detection system according to a third embodiment of the present invention;
fig. 6 is a schematic structural diagram of a capacitive howling detection apparatus according to a fourth embodiment of the present invention.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather construed as limited to the embodiments set forth herein.
Next, the present invention is described in detail by using schematic diagrams, and when the embodiments of the present invention are described in detail, the schematic diagrams are only examples for convenience of description, and the scope of the present invention should not be limited herein.
Referring to fig. 2, a flowchart of a capacitor howling detection method according to a first embodiment of the present invention is shown, where the method is applied to a capacitor howling detection apparatus, the capacitor howling detection apparatus includes a piezoelectric sensor, and when a capacitor to be detected is detected, the piezoelectric sensor is attached to the capacitor to be detected, and the method includes steps S1-S2.
S1: and acquiring an electric signal generated by the piezoelectric sensor, wherein the electric signal is converted by the piezoelectric sensor at the same frequency according to a vibration signal generated by electrostriction of the capacitor to be detected.
In the specific implementation process, the piezoelectric sensor preferably uses piezoelectric ceramics, and the capacitor to be measured is a layered capacitor and is arranged on the PCB. The layered capacitor on the PCB is in close contact with the piezoelectric ceramic, and if the capacitor generates mechanical vibration due to electrostriction, a vibration signal generated by the capacitor to be detected is acquired in real time through the piezoelectric sensor. In order to facilitate processing and detection, the vibration signals are usually converted into electrical signals at the same frequency, specifically, the electrical signals are the voltage change signals at the same frequency at two ends of the piezoelectric ceramic.
S2: and when the frequency of the electric signal is within a preset frequency range and the power of the electric signal is greater than a power threshold value, judging that the capacitor to be tested generates howling.
After the electric signal is acquired, the frequency value and the power value of the electric signal are further acquired. In this step, it is necessary to set a frequency threshold range and a power threshold of the electrical signal in advance, and after the electrical signal is obtained in step 1, compare the frequency value of the electrical signal with the preset frequency threshold range in real time, and compare the power value of the electrical signal with the preset power threshold in real time. And when the comparison result shows that the frequency value of the electric signal is within the preset frequency threshold range and the power value of the electric signal is greater than the preset power threshold, judging that the capacitor to be tested generates squeaking.
The method utilizes the piezoelectric effect of the piezoelectric material and carries out acquisition by contacting the piezoelectric material with the layered capacitor to be detected. The acquisition is completed and the signal is converted into an electric signal, and the frequency detection and the power detection are carried out on the electric signal so as to judge whether the frequency of the signal is within a preset frequency threshold range, preferably, the frequency threshold range is set to be within the identification frequency range of human ears, namely 20-20000 Hz. Meanwhile, because the intensity of the mechanical vibration of the capacitor to be tested corresponding to the power of the signal corresponds to the decibel value (dB) of the sound generated by the vibration, whether the power of the signal exceeds a preset power threshold value or not is judged, and therefore whether the sound generated by the mechanical vibration of the capacitor to be tested exceeds the lower hearing limit of human ears or not can be judged. If the frequency of the signal and the corresponding power meet the condition, namely the frequency of the signal is within a preset frequency range, and the power of the electric signal is greater than a power threshold value, it is judged that the capacitor to be tested can generate squeal which can be perceived by human ears when working.
Referring to fig. 3, a flowchart of a capacitor howling detection method according to a second embodiment of the present invention is shown, where the method is applied to a capacitor howling detection apparatus, the capacitor howling detection apparatus includes a piezoelectric sensor, and when a capacitor to be detected is detected, the piezoelectric sensor is attached to the capacitor to be detected, and the method includes steps S11-S16.
S11: and acquiring an electric signal generated by the piezoelectric sensor, and optimizing the electric signal.
In the embodiment, a vibration signal generated by the layered capacitor electrostriction to be detected is collected through the piezoelectric ceramic, converted into an electric signal with the same frequency, and amplified through the signal amplifier to realize optimization processing. The power value of the electric signal is amplified by specified times through the amplification effect of the signal amplifier, so that the electric signal is favorably processed in the subsequent method steps.
S12: and acquiring the frequency value of the electric signal and acquiring the power value of the electric signal.
And after the optimization processing of the electric signal is finished, reading the frequency value and the power value of the electric signal through equipment. In the reading process, the frequency value of the electric signal can be read in real time through an oscilloscope or other same equipment, and the power value of the electric signal can be read. In the present invention, the optimized electrical signal is transmitted to a frequency detection circuit and a power detection circuit, the frequency of the electrical signal is detected by the frequency detection circuit, and the power of the electrical signal is detected by the power detection circuit.
S13: and judging whether the frequency of the electric signal is within the preset frequency range, and sending a high level signal when the frequency of the electric signal is within the preset frequency range, otherwise sending a low level signal.
Specifically, the frequency detection circuit detects the frequency of the electrical signal. The frequency detection circuit presets a frequency threshold range and compares the frequency value of the electrical signal with the frequency threshold range. The frequency threshold range can be set as the recognizable frequency range of human ear to sound, the range is usually 20Hz-20000Hz, if the frequency value of the signal is in the range, it means that the vibration signal generated by the electrostriction of the capacitor to be measured corresponding to the electrical signal emits the recognizable sound of human ear. In the actual detection process of the frequency detection circuit, the frequency detection circuit detects whether the frequency value of the electric signal is within a preset frequency threshold range, if so, the frequency detection circuit outputs a high level signal, otherwise, the frequency detection circuit outputs a low level signal.
S14: and judging whether the power of the electric signal is greater than the power threshold value, and sending a high level signal when the power of the electric signal is greater than the power threshold value, otherwise sending a low level signal.
Similarly, the power of the electrical signal is detected by the power detection circuit. The power detection circuit presets a power threshold value and compares the power value of the electric signal with the power threshold value range. Specifically, the power of the sound recognizable by human ears is more than 15dB, and the power of the signal generated on the piezoelectric ceramic due to the vibration signal generated by the electrostriction of the capacitor to be detected is p _15dB, so that the detection threshold of the power detection circuit is M × p _15dB, and when M is the electric signal is optimized, the signal amplifier amplifies the power of the electric signal. If the power of the electric signal is higher than the threshold value, the power detection circuit outputs a high level signal, otherwise, a low level signal is output.
S15: and determining whether the capacitor to be detected has the howling phenomenon or not by combining the results of the frequency detection and the power detection.
And when judging, judging whether the howling phenomenon exists or not according to the results of the frequency detection and the power detection. In the above two steps, after the comparison and judgment are performed by the frequency detection circuit and the power detection circuit, the frequency detection circuit and the power detection circuit respectively output a high level or a low level according to the judgment result. In this step, an and circuit is provided at the level output terminals of the frequency detection circuit and the power detection circuit. The AND circuit comprises two input ends and an output end, wherein each input end is respectively connected with the output ends of the frequency detection circuit and the power detection circuit, receives high and low levels output by the frequency detection circuit and the power detection circuit, and performs AND logic operation. If the frequency detection circuit and the power detection circuit both output high level, namely the signal frequency and the power both meet the identification range of human ears, the output end of the AND gate circuit outputs high level signals, otherwise, low level signals are output.
S16: and if the capacitor to be detected has squeal, sending an alarm signal to prompt a user that the capacitor to be detected has squeal.
An alarm circuit is further arranged and is connected with the output end of the AND gate circuit. When the AND gate circuit outputs a high level, the alarm circuit gives an alarm. Specifically, the alarm modes at least comprise a light alarm and a buzzer alarm. The light alarm is realized by a light emitting diode arranged in the alarm circuit, and the buzzer alarm is realized by a buzzer device arranged in the alarm circuit. Specifically, the light emitting diodes can be red and green light emitting diodes, and can be preset to emit red light when the alarm circuit receives a high level signal and emit green light or not emit light when the alarm circuit receives a low level signal; meanwhile, the preset buzzer sounds when the alarm circuit receives a high-level signal and keeps silent when the alarm circuit receives a low-level signal.
Therefore, when the alarm circuit receives the level signal at the output end of the AND gate circuit, if the level signal is identified to be a low level signal, the light emitting diode in the alarm circuit is controlled to emit green light or not to emit light, and meanwhile, the buzzer in the alarm circuit is controlled to keep silent; and if the identification level signal is a high level signal, controlling a light emitting diode in the alarm circuit to emit red light, and simultaneously controlling a buzzer in the alarm circuit to emit sound to remind the capacitor to be detected of howling.
In the present invention, the piezoelectric sensor, the signal converter (for converting the vibration signal into the electrical signal), the signal amplifier, the frequency detection circuit, the power detection circuit, the and gate circuit, and the alarm circuit are all connected to the same power module for power supply, and preferably, a battery power supply method is adopted.
As shown in fig. 4 and fig. 5, another aspect of the present invention further provides a capacitance howling detection system, which is applied to a capacitance howling detection device, wherein when a capacitor to be detected is detected, the piezoelectric sensor is attached to the capacitor to be detected, and the system includes:
the signal acquisition module is used for acquiring an electric signal generated by the piezoelectric sensor, and the electric signal is converted by the piezoelectric sensor at the same frequency according to a vibration signal generated by electrostriction of the capacitor to be detected;
and the howling judgment module is used for judging that the capacitor to be tested generates howling when the frequency of the electric signal is within a preset range and the power of the electric signal is greater than a threshold value.
Further, an optimization module is arranged between the signal acquisition module and the howling judgment module and used for optimizing the electric signals acquired by the signal acquisition module. In the invention, the optimization module is a signal amplifier which amplifies the power of the electric signal so as to facilitate the processing of the signal by a post-stage device.
And further, after the electrical signal is optimized, a reading module is arranged for reading the frequency value and the power value of the electrical signal.
And after being read by the reading module, the data is sent to a howling judgment module. The howling judging module comprises a frequency judging unit and a power judging unit. The frequency judging unit is used for judging whether the frequency of the electric signal is within the preset frequency range or not, and sending out a high level signal when the frequency of the electric signal is within the preset frequency range, otherwise sending out a low level signal. The power judging unit is used for judging whether the power of the electric signal is greater than the power threshold value or not, and sending out a high level signal when the power of the electric signal is greater than the power threshold value, otherwise sending out a low level signal.
The frequency detection module presets a frequency threshold range and compares the frequency value of the electrical signal with the frequency threshold range. The frequency threshold range can be set as the recognizable frequency range of human ear to sound, the range is usually 20Hz-20000Hz, if the frequency value of the signal is in the range, it means that the vibration signal generated by the electrostriction of the capacitor to be measured corresponding to the electrical signal emits the recognizable sound of human ear. In the actual detection process of the frequency detection module, the frequency detection module detects whether the frequency value of the electrical signal is within a preset frequency threshold range, and if so, the frequency detection module outputs a high level signal, otherwise, a low level signal is output.
The power detection module presets a power threshold value and compares the power value of the electric signal with the power threshold value range. Specifically, the power of the sound that can be recognized by the human ear is more than 15dB, and the power of the signal generated on the piezoelectric ceramic due to the vibration signal generated by the electrostriction of the capacitor to be detected is p _15dB, so that the detection threshold of the power detection module is M × p _15dB, and when M is the electric signal is optimized, the signal amplifier amplifies the power of the electric signal. If the power of the electric signal is higher than the threshold value, the power detection module outputs a high level signal, otherwise, a low level signal is output.
If the frequency detection module and the power detection module both output high level signals, it indicates that the capacitor to be detected generates a howling phenomenon. Specifically, a logic and gate module is arranged at the output ends of the frequency detection module and the power detection module, the judgment is carried out through a logic and gate, when the frequency detection module and the power detection module connected with the logic and gate both output high level signals, the output end of the logic and gate module outputs high level signals, otherwise, low level signals are output.
Furthermore, the logic AND gate module is connected with the alarm module, and when the logic AND gate module outputs a high level, the alarm module gives an alarm. Specifically, the alarm modes at least comprise a light alarm and a buzzer alarm. The light alarm is realized by a light emitting diode arranged in the alarm module, and the buzzer alarm is realized by a buzzer device arranged in the alarm module. Specifically, the light emitting diodes can be red and green light emitting diodes, and the preset can be set to emit red light when the alarm module receives a high level signal and emit green light or not emit light when the alarm module receives a low level signal; meanwhile, the preset buzzer sounds when the alarm module receives a high level signal, and keeps silent when a low level signal is received.
Therefore, the alarm module receives the level signal at the output end of the logic AND gate module, if the level signal is identified to be a low level signal, the light emitting diode in the alarm module is controlled to emit green light or not emit light, and meanwhile, the buzzer in the alarm module is controlled to keep silent; and if the identification level signal is a high level signal, controlling a light emitting diode in the alarm module to emit red light, and simultaneously controlling a buzzer in the alarm module to emit sound to remind the capacitor to be tested of howling.
The present invention also proposes a computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out the capacitive howling detection method as described above.
The present invention further provides a capacitive howling detection device, as shown in fig. 6, which is a capacitive howling detection device according to a fourth embodiment of the present invention, and the capacitive howling detection device includes two clamp arms and a piezoelectric sensor, the tops of the two clamp arms are pivotally connected, the piezoelectric sensor is disposed on the inner side of the bottom end of one of the clamp arms, the capacitive howling detection device further includes a memory, a processor, and a computer program stored in the memory and capable of being run on the processor, and the processor implements the method according to the foregoing technical solution when executing the program.
The device further comprises an adjusting screw rod, a rotating adjusting element is arranged in the middle of the adjusting screw rod, two clamping arms are provided with a screw hole at the corresponding position, two ends of the adjusting screw rod are in threaded connection with the screw hole respectively, and when the rotating adjusting element is rotated, two ends of the adjusting screw rod are continuously screwed into the corresponding screw holes so as to enable the two clamping arms to approach each other. Every the bottom inboard of pressing from both sides tight arm all is equipped with a flexible pad, piezoelectric sensor locates one of them flexible pad is towards another on the surface of flexible pad, through setting up flexible pad to in the clamping operation of preventing, press from both sides the electric capacity that hinders to detect, and make the contact inseparabler, reliable. The capacitor squeal detection device further comprises a light alarm and a buzzer alarm, wherein the light alarm is arranged at the top end of the device, the buzzer alarm is arranged inside one of the clamping arms, and a buzzer sound outlet hole is formed in the clamping arm so as to transmit the sound of the buzzer. One ends of the two clamping arms are combined together through the rotating part and can rotate around the rotating part, the hand-held part is arranged on the rotating part and opposite to the clamping arms, so that a tester can hold the hand conveniently, and the light alarm can be arranged on the hand-held part. Further, a switching device of the alarm circuit is provided on the hand-held portion, and the alarm circuit is turned off by the switching device after the alarm is acquired by the worker.
And a power supply module is also arranged in the clamping arm and is connected with the device for detecting the layered capacitor squeal for supplying power.
When the device is in an open state, the voltage signal is transmitted to a capacitor squeaking detection system to be detected, if the frequency and the strength of the signal are in a range recognizable by human ears, an alarm lamp of a handheld part is changed into red, and a buzzer gives out a sound to alarm.
Those of skill in the art will understand that the logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be viewed as implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention.
Claims (8)
1. A capacitor squealing detection method is applied to a capacitor squealing detection device and is characterized by comprising two clamping arms, an adjusting screw rod and a piezoelectric sensor, wherein the tops of the two clamping arms are pivoted, the piezoelectric sensor is arranged on the inner side of the bottom end of one of the clamping arms, the adjusting screw rod comprises an adjusting element, two ends of the adjusting element are respectively in threaded connection with screw holes in the two clamping arms, and when a capacitor to be detected is detected, the adjusting element is rotated to drive the two clamping arms to be close to and clamp the capacitor to be detected so that the piezoelectric sensor is attached to the capacitor to be detected, and the method comprises the following steps:
acquiring an electric signal generated by the piezoelectric sensor, wherein the electric signal is converted by the piezoelectric sensor at the same frequency according to a vibration signal generated by electrostriction of the capacitor to be detected;
acquiring a frequency value and a power value of the electric signal;
when the frequency of the electric signal is within a preset frequency range and the power of the electric signal is greater than a power threshold value, judging that the capacitor to be tested generates howling;
if the frequency of the electric signal is judged to be within the preset frequency range, sending a high level signal, otherwise sending a low level signal;
and if the power of the electric signal is judged to be larger than the power threshold value, sending a high level signal, otherwise, sending a low level signal.
2. The capacitive howling detection method of claim 1, wherein after the step of acquiring the electrical signal generated by the piezoelectric sensor, the method further comprises:
optimizing the electrical signal; wherein the optimization includes at least amplifying the power of the electrical signal.
3. The capacitor howling detection method according to claim 1, wherein after the step of determining that the capacitor to be tested generates howling, the method further comprises: and sending an alarm signal to prompt a user that the capacitor to be tested has squeaking.
4. The capacitor squeaking detection device is characterized by comprising two clamping arms, an adjusting screw rod and a piezoelectric sensor, wherein the tops of the two clamping arms are pivoted, the piezoelectric sensor is arranged on the inner side of the bottom end of one of the clamping arms, the adjusting screw rod comprises an adjusting element, two ends of the adjusting element are respectively in threaded connection with screw holes in the two clamping arms, and the adjusting element is used for driving the two clamping arms to be close to and clamp a capacitor to be detected so as to enable the piezoelectric sensor to be attached to the capacitor to be detected; the capacitive howling detection apparatus further comprises a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the capacitive howling detection method according to any one of claims 1 to 3 when executing the program.
5. The capacitive squeal detection device of claim 4 wherein a flexible pad is disposed inside the bottom end of each clamping arm, and the piezoelectric sensor is disposed on a surface of one of the flexible pads facing the other flexible pad.
6. A capacitive howling detection device as claimed in claim 4, characterized in that the capacitive howling detection device further comprises a light alarm and a buzzer alarm.
7. The capacitor squealing detection system is applied to a capacitor squealing detection device and is characterized by comprising two clamping arms, an adjusting screw rod and a piezoelectric sensor, wherein the tops of the two clamping arms are pivoted, the piezoelectric sensor is arranged on the inner side of the bottom end of one of the clamping arms, the adjusting screw rod comprises an adjusting element, two ends of the adjusting element are respectively in threaded connection with screw holes in the two clamping arms, the adjusting element is used for driving the two clamping arms to be close to and clamp the capacitor to be detected so as to enable the piezoelectric sensor to be attached to the capacitor to be detected, and the system comprises:
the signal acquisition module is used for acquiring an electric signal generated by the piezoelectric sensor, and the electric signal is converted by the piezoelectric sensor at the same frequency according to a vibration signal generated by electrostriction of the capacitor to be detected;
the reading module is used for acquiring the frequency value and the power value of the electric signal;
the howling judging module is used for judging that the capacitor to be tested generates howling when the frequency of the electric signal is within a preset range and the power of the electric signal is greater than a threshold value;
the howling module comprises a frequency judging unit and a power judging unit; the frequency judging unit is used for judging whether the frequency of the electric signal is within the preset frequency range or not, and sending out a high level signal when the frequency of the electric signal is within the preset frequency range, otherwise sending out a low level signal;
the power judging unit is used for judging whether the power of the electric signal is larger than the power threshold value or not, and sending out a high level signal when the power of the electric signal is larger than the power threshold value, otherwise sending out a low level signal.
8. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out a method for capacitive howling detection as claimed in any one of the claims 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101674709A (en) * | 2008-09-08 | 2010-03-17 | 统宝光电股份有限公司 | Layout structure and method for reducing noise generated by flexible printed circuit board |
| CN201688912U (en) * | 2010-04-30 | 2010-12-29 | 毕思达 | Detector |
| CN102221646A (en) * | 2010-03-15 | 2011-10-19 | 阿尔卑斯电气株式会社 | Capacitance detecting device and capacitance detecting method |
| TW201546846A (en) * | 2014-01-13 | 2015-12-16 | Apple Inc | Acoustic noise cancellation in multi-layer capacitors |
| CN205209626U (en) * | 2015-12-25 | 2016-05-04 | 潍坊医学院 | Sensor based on discernment of characteristic audio frequency |
| CN106454670A (en) * | 2016-10-20 | 2017-02-22 | 海能达通信股份有限公司 | Howling detection method and device |
| CN106644049A (en) * | 2016-09-29 | 2017-05-10 | 维沃移动通信有限公司 | Device and method of measuring capacitive sound |
| CN110312359A (en) * | 2018-03-27 | 2019-10-08 | 联发科技股份有限公司 | For reducing the apparatus and method of capacitor noise |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101025999B1 (en) * | 2008-12-12 | 2011-03-30 | 삼성전기주식회사 | Circuit Board Device and Integrated Circuit Device |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101674709A (en) * | 2008-09-08 | 2010-03-17 | 统宝光电股份有限公司 | Layout structure and method for reducing noise generated by flexible printed circuit board |
| CN102221646A (en) * | 2010-03-15 | 2011-10-19 | 阿尔卑斯电气株式会社 | Capacitance detecting device and capacitance detecting method |
| CN201688912U (en) * | 2010-04-30 | 2010-12-29 | 毕思达 | Detector |
| TW201546846A (en) * | 2014-01-13 | 2015-12-16 | Apple Inc | Acoustic noise cancellation in multi-layer capacitors |
| CN205209626U (en) * | 2015-12-25 | 2016-05-04 | 潍坊医学院 | Sensor based on discernment of characteristic audio frequency |
| CN106644049A (en) * | 2016-09-29 | 2017-05-10 | 维沃移动通信有限公司 | Device and method of measuring capacitive sound |
| CN106454670A (en) * | 2016-10-20 | 2017-02-22 | 海能达通信股份有限公司 | Howling detection method and device |
| CN110312359A (en) * | 2018-03-27 | 2019-10-08 | 联发科技股份有限公司 | For reducing the apparatus and method of capacitor noise |
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