CN211123222U - Test system for detecting anode and cathode of electrolytic filter capacitor - Google Patents
Test system for detecting anode and cathode of electrolytic filter capacitor Download PDFInfo
- Publication number
- CN211123222U CN211123222U CN201922040609.2U CN201922040609U CN211123222U CN 211123222 U CN211123222 U CN 211123222U CN 201922040609 U CN201922040609 U CN 201922040609U CN 211123222 U CN211123222 U CN 211123222U
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- filter capacitor
- resistor
- electrolytic
- electrolytic filter
- test system
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- 239000003990 capacitor Substances 0.000 title claims abstract description 49
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 2
- 238000004880 explosion Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
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Abstract
The utility model discloses a test system for detecting positive negative pole of electrolytic filter electric capacity relates to electronic component technical field. The detection instrument is provided with an input module, the output ends of the input module and the voltage detection module are respectively electrically connected with the input end of the CPU, and the CPU is connected with the output power supply. In this scheme, the output voltage and output current, and the output time can be set. By utilizing the characteristic that the reverse leakage current of the electrolytic filter capacitor is larger than the forward leakage current, if the electrolytic filter capacitor is reversely connected, the electrolytic filter capacitor cannot be charged to the rated voltage within a set time, so that the charging fails, and the electrolytic filter capacitor is judged to be installed wrongly. Whether the electrolytic filter capacitor on the PCB is reversely mounted or not can be effectively detected, the fault phenomena of explosion, burning and the like of the filter capacitor after electrification caused by polarity errors are avoided, and the normal operation of equipment is guaranteed.
Description
Technical Field
The utility model relates to an electronic component technical field specifically is a test system for detecting positive negative pole of electrolytic filter electric capacity.
Background
The electrolytic filter capacitor installed on the PCB is often assembled incorrectly due to factors such as manual work, and in the prior art, the electrolytic filter capacitor is generally judged by a manual inspection method, but in the method, the leakage inspection is caused due to manual negligence, and if the electrolytic filter capacitor installed incorrectly is not inspected, the electrolytic filter capacitor may be cracked and burnt after being powered on, and a debugger in the production process may be injured. And once the fault occurs after the electrolytic filter capacitor is used for a long time in the hands of a client, the production enterprise needs to bear the maintenance cost, and the client can mark the product quality of the enterprise, so that the reputation of the enterprise is damaged.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the utility model provides a test system for detecting positive negative pole of electrolytic filter electric capacity, this scheme can be used to install as a link that the finished product detected behind the components and parts behind the PCB for whether wrong detection is installed to electrolytic capacitor, a series of problems of bringing after effectively having avoided electrolytic capacitor to install the mistake.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a test system for detecting the positive and negative electrodes of an electrolytic filter capacitor comprises a CPU, an output power supply and a voltage detection module, wherein an input module is arranged on a detection instrument, the output ends of the input module and the voltage detection module are respectively and electrically connected with the input end of the CPU, and the CPU is connected with the output power supply.
In this scheme, the output voltage and output current, and the output time can be set. And setting the output voltage value of the test system according to the rated voltage of the electrolytic filter capacitor, and setting the output current. The test end contacts the electrolytic filter capacitor by using a probe, a test system is started, the test system can constantly output at a set current value, the voltage of the test end rises from 0V at the moment, the maximum voltage can be raised to the set voltage value, the system always monitors the voltage value of the test end and times, after the set time is reached, if the voltage of the test end does not reach the set value, the mounting problem of the electrolytic filter capacitor is indicated, and if the mounting.
The scheme utilizes the characteristic that reverse leakage current of the electrolytic filter capacitor is larger than forward leakage current, if the electrolytic filter capacitor is reversely connected, the electrolytic filter capacitor cannot be charged to rated voltage within set time, so that charging failure is caused, and the electrolytic filter capacitor is judged to be installed wrongly. Whether the electrolytic filter capacitor on the PCB is reversely mounted or not can be effectively detected, the fault phenomena of explosion, burning and the like of the filter capacitor after electrification caused by polarity errors are avoided, and the normal operation of equipment is guaranteed.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a voltage sampling diagram of the present invention
Fig. 3 is a schematic block diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: a test system for detecting the positive and negative electrodes of an electrolytic filter capacitor comprises a CPU, wherein the CPU is electrically connected with the output end of a voltage detection module through an AD conversion circuit, the CPU is also electrically connected with an input module, and the output end of the CPU is electrically connected with an output power supply.
The method comprises the following steps during detection:
obtaining rated voltage V of electrolytic capacitor
The output voltage Vout of the test system is set to V, the output current I and the output time t are set to V
Connecting the electrolytic capacitor to the test terminal
Output voltage of four-start test system
If the polarity of the electrolytic capacitor is correct, detecting that the voltage of the output end rises from 0V to Vout within time t; if the polarity of the electrolytic capacitor is wrong, the voltage at the output end cannot rise to Vout within the time t
Sixthly, judging a result according to the t time voltage value: the polarity of the electrolytic capacitor is correct.
FIG. 2 is a schematic diagram of a filter capacitor voltage sampling, wherein the negative electrode of an electrolytic filter capacitor is HV, the positive electrode is GND, U1 is a L F411 single operational amplifier chip, the 4 pins of the electrolytic filter capacitor are connected with-12V, the 7 pins of the electrolytic filter capacitor are connected with +12V, the 2 pins of the electrolytic filter capacitor are connected with-HV indirect R1 and R2, meanwhile, R4 and R5 are arranged between the 2 pins and the 6 pins, the 2 pin of U1 is connected with protection tubes D1 and D2, the 3 pin of U1 is connected with GND indirect R3, C1 is a filter capacitor of-12V, C2 is a filter capacitor of +12V, and the 6 pin voltage of U1 is output to an AD conversion chip in a system, and is converted by the internal CPU to obtain the voltage value of the electrolytic filter capacitor through reading value and then.
In the present embodiment, the resistor R1 and the resistor R2 are metal film resistors of 1M Ω 2W; the resistor R4 and the resistor R5 are 10k omega; the resistor R3 is 20k omega, and the filter capacitor C1 and the filter capacitor C2 are 0.1 muF.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (5)
1. The utility model provides a test system for detecting positive negative pole of electrolytic filter electric capacity, includes CPU, its characterized in that: the CPU is electrically connected with the output end of the voltage detection module through the AD conversion circuit, the CPU is also electrically connected with the input module, and the output end of the CPU is electrically connected with the output power supply.
2. The test system for detecting the positive and negative electrodes of the electrolytic filter capacitor as claimed in claim 1, wherein: the detection circuit of the voltage detection module comprises a single operational amplifier chip, a cathode-HV and an anode GND, wherein 4 pins of the single operational amplifier chip are connected with a-12V filter capacitor C1, 7 pins of the single operational amplifier chip are connected with a +12V filter capacitor C2, 2 pins of the single operational amplifier chip, a-HV indirect resistor R1 and a resistor R2, a resistor R4 and a resistor R5 are connected in series between the 2 pins and 6 pins of the single operational amplifier chip, and the 2 pins of the single operational amplifier chip are connected with protection tubes D1 and D2; the 3-pin and GND indirect resistor R3 of the single operational amplifier chip; the 6-pin voltage of the single operational amplifier chip is output to an AD conversion chip in the system.
3. The test system for detecting the positive and negative electrodes of the electrolytic filter capacitor as claimed in claim 2, wherein: the negative electrode-HV range is 0 to-800V.
4. The test system for detecting the positive and negative electrodes of the electrolytic filter capacitor as claimed in claim 2, wherein: the resistor R1 and the resistor R2 are metal film resistors of 1M omega 2W, the resistor R4 and the resistor R5 are 10k omega, and the resistor R3 is 20k omega.
5. The test system for detecting the positive and negative electrodes of the electrolytic filter capacitor as claimed in claim 2, wherein: the filter capacitor C1 and the filter capacitor C2 are 0.1 muF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922040609.2U CN211123222U (en) | 2019-11-23 | 2019-11-23 | Test system for detecting anode and cathode of electrolytic filter capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922040609.2U CN211123222U (en) | 2019-11-23 | 2019-11-23 | Test system for detecting anode and cathode of electrolytic filter capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211123222U true CN211123222U (en) | 2020-07-28 |
Family
ID=71701487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922040609.2U Expired - Fee Related CN211123222U (en) | 2019-11-23 | 2019-11-23 | Test system for detecting anode and cathode of electrolytic filter capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211123222U (en) |
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2019
- 2019-11-23 CN CN201922040609.2U patent/CN211123222U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200728 |