CN115877274A - Capacitor pre-detection device and pre-detection method thereof - Google Patents
Capacitor pre-detection device and pre-detection method thereof Download PDFInfo
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- CN115877274A CN115877274A CN202211171607.7A CN202211171607A CN115877274A CN 115877274 A CN115877274 A CN 115877274A CN 202211171607 A CN202211171607 A CN 202211171607A CN 115877274 A CN115877274 A CN 115877274A
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Abstract
A capacitor pre-detection device and a pre-detection method thereof are provided. The bearing unit is suitable for placing a plurality of capacitors. The measuring unit is arranged on the bearing unit and electrically connected with the capacitor, and is used for obtaining the measuring value of the capacitor and generating a plurality of measuring data signals. The pre-detection module comprises a rotatable detection barrel and a charging unit arranged on the detection barrel. The conveying unit is used for placing the bearing unit in the detection cylinder. The receiving module is used for receiving the measurement data signal. The processing module is electrically connected with the receiving module and the pre-detection module. When the bearing unit and the capacitor are positioned in the detection cylinder, the charging unit can charge the capacitor, the measuring unit can obtain the measuring value of the capacitor and generate the measuring data signal, and the processing module judges whether the capacitor is a good product or not according to the measuring data signal.
Description
Technical Field
The present invention relates to a pre-detection device, and more particularly, to a pre-detection device and a pre-detection method for a capacitor.
Background
In recent years, electronic products are diversified due to the advancement of science and technology, and each electronic product uses a capacitor, so that the market demand for the capacitor is increasing. In the manufacturing process of the capacitor, the conventional method is to select good products and defective products through the flow of artificial aging and automatic aging, so that the yield of shipment can be improved. However, in the conventional method, screening detection is performed after the aging is completed, and if defective products can be screened in advance before the automatic aging, the yield of shipment can be further improved.
Disclosure of Invention
It is an object of the present invention to provide a capacitive pre-detection device that solves at least one of the above problems.
Another object of the present invention is to provide a pre-detection method that solves at least one of the above problems.
The invention discloses a capacitor pre-detection device, which comprises a bearing unit, a detection unit and a detection unit, wherein the bearing unit is suitable for placing a plurality of capacitors; the measuring unit is arranged on the bearing unit and electrically connected with the capacitor, and is used for obtaining a measuring value of the capacitor and generating a plurality of measuring data signals; the pre-detection module comprises a rotatable detection barrel and a charging unit arranged on the detection barrel; the conveying unit is used for placing the bearing unit in the detection cylinder; a receiving module for receiving the measured data signal; the processing module is electrically connected with the receiving module and the pre-detection module; when the bearing unit and the capacitor are positioned in the detection cylinder, the charging unit can charge the capacitor, the measuring unit can obtain a measured value of the capacitor and generate a measured data signal, and the processing module judges whether the capacitor is good or not according to the measured data signal.
According to the capacitance pre-detection device, the bearing unit comprises a plurality of switches which are respectively arranged corresponding to the capacitors and electrically connected with the processing module, and the charging unit charges the capacitors by virtue of the switches.
According to the capacitance pre-detection device, the measured value of the capacitance comprises a voltage value, the processing module provides an upper limit value and a lower limit value, when the voltage value of any one capacitance exceeds the range of the upper limit value and the lower limit value, the processing module judges that the capacitance is abnormal, and the switch corresponding to the capacitance is cut off to stop charging.
In the capacitance pre-detection device, the measuring unit is a plurality of measuring circuit boards, and the bearing unit comprises a plurality of heat dissipation pieces respectively arranged on the measuring circuit boards.
According to the capacitance pre-detection device, the pre-detection module further comprises a protection device arranged between the charging unit and the bearing unit, and the protection device is provided with a high-impedance resistor.
The invention relates to a capacitor pre-detection method, which comprises the following steps: placing a plurality of capacitors on a bearing unit; placing the bearing unit together with the capacitor in a detection cylinder; providing a predetermined current of the capacitor for charge aging; the measuring unit obtains a measuring value from the capacitor in the charging aging process and generates a plurality of measuring data signals; and the processing module judges whether the capacitor is good or not according to the measurement data signal.
In the method for pre-detecting a capacitor according to the present invention, the load-bearing unit includes a plurality of switches respectively corresponding to the capacitors and electrically connected to the processing module, and the charging unit charges the capacitors by means of the switches.
According to the capacitor pre-detection method, the measured value of the capacitor comprises a voltage value, the processing module provides an upper limit value and a lower limit value, and when the voltage value of any one capacitor exceeds the range of the upper limit value and the lower limit value, the processing module judges that the capacitor is abnormal and cuts off the switch corresponding to the capacitor to stop charging.
The invention relates to a capacitor pre-detection method, wherein the measured values of a capacitor comprise a current value, a voltage value and a temperature value, the current value is 0 after the capacitor is charged and aged, a processing module provides preset time, a preset voltage value and a preset temperature value, and when the difference value between the time required by the voltage value of any one capacitor to reach the preset voltage value and the preset time is greater than a time threshold value, the processing module judges that the capacitor is a defective product.
According to the capacitor pre-detection method, when the difference value between the temperature value of any one capacitor after charging and aging and the preset temperature value is larger than the temperature threshold value, the processing module judges that the capacitor is a defective product.
The capacitor pre-detection method comprises the following substeps of charging and aging: charging and aging the capacitor; the processing module judges whether the measuring unit detects abnormity, if not, whether the aging is finished is judged, and if so, the capacitor stops charging; and the processing module judges whether the aging is finished, if not, the substep of charging and aging the capacitor is returned again, and if yes, the substep is ended.
According to the capacitance pre-detection method, the detection frequency of the measuring unit is once per second and is immediately transmitted to the processing module.
The invention has the beneficial effects that: when the bearing unit and the capacitor are positioned in the detection cylinder, the charging unit can charge the capacitor, the measuring unit can obtain the measured value of the capacitor and generate the measured data signal, and the processing module judges whether the capacitor is good or not according to the measured data signal, so that the screening effect is achieved.
Drawings
FIG. 1 is a block diagram of an embodiment of a capacitive pre-detection device of the present invention;
FIG. 2 is an exploded perspective view of the embodiment;
FIG. 3 is a flow chart of an embodiment of the pre-detection method of the present invention;
fig. 4 is a flowchart of the substeps of step S3 of this embodiment.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Referring to fig. 1 and 2, an embodiment of the capacitor pre-inspection apparatus of the present invention is adapted to pre-inspect the capacitor C before performing the automatic aging process to screen out defective products. The capacitance pre-detection device comprises a bearing unit 1, a measuring unit 2, a pre-detection module 3, a conveying unit 4, a receiving module 5 and a processing module 6.
The carrying unit 1 may be, for example, a carrying tray, and is suitable for placing a plurality of capacitors C, and the carrying unit 1 is provided with a plurality of heat dissipation members 11 capable of helping the carrying unit 1 and the capacitors C to dissipate heat. The measuring unit 2 is disposed on the carrying unit 1 and electrically connected to the capacitor C, the measuring unit 2 includes a plurality of measuring circuit boards 21 disposed on the carrying unit 1, respectively, for obtaining a measuring value of the capacitor C and generating a plurality of measuring data signals, and each measuring circuit board 21 has an Analog-to-digital converter (ADC). The measured value of the capacitor C comprises a current value, a voltage value and a temperature value. The pre-detecting module 3 includes a rotatable detecting cylinder 31, a charging unit 32 disposed on the detecting cylinder 31, and a protecting device 33 disposed between the charging unit 32 and the carrying unit 1. The detecting cylinder 31 may be, for example, a slip ring, and may be driven to rotate by a motor (not shown), so as to reduce wiring. The conveying unit 4 is used for placing the carrying unit 1 in the detecting cylinder 31 and moving the carrying unit 1 out of the detecting cylinder 31 after the detection is completed. The receiving module 5 is used for receiving the measurement data signal, the processing module 6 is electrically connected to the receiving module 5 and the pre-detection module 3, and the receiving module 5 and the processing module 6 can be located in a computer (not shown), for example. The measuring unit 2 can transmit data to the receiving module 5 in a wired or wireless manner.
When the carrying unit 1 and the capacitor C are located in the detecting cylinder 31, the charging unit 32 can charge the capacitor C, the measuring unit 2 can obtain the measured value of the capacitor C and generate the measured data signal, and the processing module 6 can screen out the defective product of the capacitor C by judging whether the capacitor C is a good product or not according to the measured data signal. The carrying unit 1 further includes a plurality of switches (not shown) respectively corresponding to the capacitors C and electrically connected to the processing module 6, and the charging unit 32 charges the capacitors C through the switches. The protection device 33 has a high impedance resistor, and functions to drop most of the voltage drop on the protection device 33 when the capacitor C or the subsequent circuit is short-circuited, and to limit the current by the high impedance, so as to protect the whole circuit and the capacitor C.
Referring to fig. 3, an embodiment of the pre-detection method of the present invention is implemented by the capacitive pre-detection apparatus of the present invention, and includes the following steps S1 to S6:
in step S1, a plurality of capacitors C are first placed on the carrying unit 1. Next, in step S2, the carrying unit 1 is placed in the detecting cylinder 31 together with the capacitor C. Specifically, the transportation unit 4 places the carrying unit 1 and the capacitor C in the detecting cylinder 31, and the transportation unit 4 may be, for example, a robot arm, but is not limited thereto.
Referring to fig. 3 and 4, in step S3, a predetermined current is provided to the capacitor C for charging and aging. Specifically, the processing module 6 first closes the switch on the carrying unit 1, then the motor controls the pressing of the pressing bar to provide a low voltage, then detects whether a charging target (i.e. the capacitor C) exists, confirms that the processing module 6 opens the switch after the existence, and then the motor drives the detecting cylinder 31 to rotate to provide the predetermined current for the capacitor C for charging aging. When the voltage value of any one of the capacitors C exceeds the range of the upper limit value and the lower limit value, the processing module 6 determines that the capacitor C is abnormal and switches off the switch corresponding to the capacitor C to stop charging, and the rest of the capacitors C are not affected. This step S3 includes the following substeps S31 to S34: and a substep S31, charging and aging the capacitor C. In the substep S32, the processing module 6 determines whether the ADC of the measuring unit 2 detects an abnormality, if the result is no, the substep S34 continues to determine whether the aging is completed, if the result is yes, the substep S33 is performed, and the capacitor C stops charging. And a substep S34, in which the processing module 6 determines whether the aging is completed, and if not, returns to the substep S31 of charging and aging the capacitor C, and if yes, ends the substep S34.
In step S4, the measuring unit 2 obtains a measurement value from the capacitor C during the charging aging process and generates a plurality of measurement data signals. Specifically, the measured value of the capacitor C includes a current value, a voltage value and a temperature value, and the ADC of the measuring unit 2 can set the detection frequency to be once per second and immediately transmit the detection frequency to the receiving module 5 and then transmit the detection frequency back to the processing module 6.
In step S5, the processing module 6 determines whether the capacitor C is good according to the measurement data signal. Specifically, after the capacitor C is charged and aged, the current value is 0, the processing module 6 provides a predetermined time, a predetermined voltage value and a predetermined temperature value, and when the difference between the time required for the voltage value of any one of the capacitors C to reach the predetermined voltage value and the predetermined time is greater than a time threshold, the processing module 6 determines that the capacitor C is a defective product, because this represents that the capacitor C finishes aging for a short or long time, it can be inferred that the capacitor C has a smaller or larger value and exceeds an allowable tolerance value, and the capacitor C is determined to be a defective product. In another case, when the difference between the temperature value of any one of the capacitors C after being subjected to charging aging and the predetermined temperature value is greater than a temperature threshold, the processing module 6 determines that the capacitor C is a defective product, because this indicates that the resistance of the capacitor C is large (according to the formula P = I) 2 R, the larger the resistance R, the larger the power P, and the temperature will inevitably rise in the case where the current I is fixed), and it is determined as a defective product if the tolerance value exceeds the allowable tolerance value. The steps S1 to S5 of the pre-detection method are the steps, so that the defective products of the capacitor C can be screened out before automatic aging, and the yield of subsequent shipment is improved.
In summary, when the carrying unit 1 and the capacitor C are located in the detecting cylinder 31, the charging unit 32 can charge the capacitor C, the measuring unit 2 can obtain the measured value of the capacitor C and generate the measured data signal, and the processing module 6 can determine whether the capacitor C is good according to the measured data signal, so as to achieve the effect of screening, and thus the objective of the present invention can be achieved.
It should be understood that the above description is only exemplary of the present invention, and that the scope of the present invention should not be limited thereby, and that the invention is intended to cover all modifications and equivalents of the claims and their equivalents.
Claims (12)
1. A capacitive pre-detection device, the capacitive pre-detection device comprising:
the bearing unit is suitable for placing a plurality of capacitors;
the measuring unit is arranged on the bearing unit and electrically connected with the capacitor, and is used for obtaining a measuring value of the capacitor and generating a plurality of measuring data signals;
the pre-detection module comprises a rotatable detection barrel and a charging unit arranged on the detection barrel;
the conveying unit is used for placing the bearing unit in the detection cylinder;
a receiving module for receiving the measured data signal; and
the processing module is electrically connected with the receiving module and the pre-detection module;
when the bearing unit and the capacitor are positioned in the detection cylinder, the charging unit can charge the capacitor, the measuring unit can obtain a measured value of the capacitor and generate a measured data signal, and the processing module judges whether the capacitor is good or not according to the measured data signal.
2. The capacitive pre-sensing apparatus of claim 1, wherein: the bearing unit comprises a plurality of switches which are respectively arranged corresponding to the capacitors and electrically connected with the processing module, and the charging unit charges the capacitors by virtue of the switches.
3. The capacitive pre-sensing device of claim 2, wherein: the measurement value of the capacitor comprises a voltage value, the processing module provides an upper limit value and a lower limit value, and when the voltage value of any one capacitor exceeds the range of the upper limit value and the lower limit value, the processing module judges that the capacitor is abnormal and cuts off the switch corresponding to the capacitor to stop charging.
4. The capacitive pre-sensing apparatus of claim 1, wherein: the measuring unit is provided with a plurality of measuring circuit boards, and the bearing unit comprises a plurality of radiating pieces which are respectively arranged on the measuring circuit boards.
5. The capacitive pre-sensing apparatus of claim 1, wherein: the pre-detection module further comprises a protection device arranged between the charging unit and the bearing unit, and the protection device is provided with a high-impedance resistor.
6. A capacitance pre-detection method comprises the following steps:
placing a plurality of capacitors on a bearing unit;
placing the bearing unit and the capacitor in a detection cylinder;
providing a predetermined current of the capacitor for charge aging;
the measuring unit obtains a measuring value from the capacitor in the charging aging process and generates a plurality of measuring data signals; and
and the processing module judges whether the capacitor is good or not according to the measurement data signal.
7. The capacitive pre-detection method of claim 6, wherein: the bearing unit comprises a plurality of switches which are respectively arranged corresponding to the capacitors and electrically connected with the processing module, and the charging unit charges the capacitors by virtue of the switches.
8. The capacitance pre-detection method of claim 7, wherein: the measured value of the capacitor comprises a voltage value, the processing module provides an upper limit value and a lower limit value, and when the voltage value of any one capacitor exceeds the range of the upper limit value and the lower limit value, the processing module judges that the capacitor is abnormal and cuts off the switch corresponding to the capacitor to stop charging.
9. The capacitive pre-detection method of claim 6, wherein: the measurement values of the capacitor comprise a current value, a voltage value and a temperature value, the current value is 0 after the capacitor is charged and aged, the processing module provides preset time, a preset voltage value and a preset temperature value, and when the difference value between the time required by the voltage value of any one capacitor reaching the preset voltage value and the preset time is greater than a time threshold value, the processing module judges that the capacitor is a defective product.
10. The capacitive pre-detection method of claim 9, wherein: when the difference value between the temperature value of any capacitor after charging and aging and the preset temperature value is larger than the temperature threshold value, the processing module judges that the capacitor is a defective product.
11. The capacitance pre-detection method of claim 7, wherein: the step of performing charge aging includes the substeps of:
charging and aging the capacitor;
the processing module judges whether the measuring unit detects abnormity, if not, whether the aging is finished is judged, and if so, the capacitor stops charging; and
and the processing module judges whether the aging is finished or not, returns to the substep of charging and aging the capacitor if the aging is not finished, and finishes the step if the aging is finished.
12. The capacitance pre-detection method of claim 7, wherein: the detection frequency of the measuring unit is once per second and is immediately transmitted to the processing module.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW110136045A TWI826831B (en) | 2021-09-28 | 2021-09-28 | Capacitance pre-detection device and pre-detection method |
| TW110136045 | 2021-09-28 |
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| Publication Number | Publication Date |
|---|---|
| CN115877274A true CN115877274A (en) | 2023-03-31 |
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| CN202211171607.7A Pending CN115877274A (en) | 2021-09-28 | 2022-09-26 | Capacitor pre-detection device and pre-detection method thereof |
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| TW (1) | TWI826831B (en) |
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| JP4437699B2 (en) * | 2004-05-14 | 2010-03-24 | 富士通マイクロエレクトロニクス株式会社 | Sensor |
| TWI285014B (en) * | 2004-06-28 | 2007-08-01 | Richtek Techohnology Corp | A capacitance voltage sensor and the method thereof used in capacitance charger |
| US8686746B2 (en) * | 2009-07-01 | 2014-04-01 | Delta Electronics, Inc. | Test apparatus and method for measuring common-mode capacitance |
| US8536838B2 (en) * | 2010-12-14 | 2013-09-17 | General Electric Company | Capacitance check and voltage monitoring circuit for use with a circuit protection device |
| TWI689732B (en) * | 2019-07-29 | 2020-04-01 | 致茂電子股份有限公司 | Device for testing capacitor |
| TWI698385B (en) * | 2019-08-26 | 2020-07-11 | 致茂電子股份有限公司 | System for testing capacitor |
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| TW202314263A (en) | 2023-04-01 |
| TWI826831B (en) | 2023-12-21 |
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