Circuit for detecting anode and cathode of electrolytic capacitor

CN119310499AActive Publication Date: 2025-01-14BOZU TECH (SUZHOU) CO LTD
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Patent Information

Application Number
CN202411484350.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-23
Publication Date
2025-01-14
Estimated Expiration
2044-10-23

AI Technical Summary

Technical Problem

In the prior art, the detection of the positive and negative polarity of electrolytic capacitors mainly depends on artificial or optical photos, and there are uncertainties and limitations, and it is impossible to effectively avoid PCBA damage or explosion problems caused by reverse insertion.

Method used

A circuit including an operational amplifier, a reverse alarm circuit and a forward indicator circuit is designed. The power switch is simulated by switch S1. The operational amplifier collects voltage signals, drives corresponding indicator and alarm circuits, and uses LEDs and buzzers to provide accurate positives. Negative polarity detection and alarm.

Benefits of technology

It accurately detects the positive and negative polarity of the electrolytic capacitor, provides automatic inspection functions, improves production efficiency and accuracy, and avoids the risk of damage or explosion caused by reverse insertion and reverse.

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Abstract

The invention belongs to the technical field of electrolytic capacitor detection, and particularly relates to a circuit for detecting positive and negative electrodes of an electrolytic capacitor, the circuit comprises a power supply VCC, an operational amplifier U1A, a reverse connection alarm circuit and a positive connection indication circuit, the electric energy output end of the power supply VCC is connected with one electrode of a switch S1, the other electrode of the switch S1 is connected with the reverse connection alarm circuit and the positive connection indication circuit, and the positive connection indication circuit is connected with the operational amplifier U1A. A positive side power supply pin of the operational amplifier U1A is connected with a power supply VCC, a negative side power supply pin of the operational amplifier U1A is grounded, and a + input pin of the operational amplifier U1A is connected with one end of the current-limiting resistor R5. The circuit for detecting the positive electrode and the negative electrode of the electrolytic capacitor can accurately detect the positive polarity and the negative polarity of the electrolytic capacitor, can also be used as a method for rapidly detecting whether the electrolytic capacitor is damaged or not, provides an automatic detection function for production of a chip mounting factory or other occasions, and improves the production efficiency and the production accuracy.
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Citation Information

Patent Citations

  • Intelligent current transformer polarity tester

    CN106066449A

  • Vehicle-mounted USB adapter plate capacitor polarity inspection circuit and inspection device

    CN217954701U

  • Arrangement for determining a capacitor which is installed with the wrong polarity in an electrical circuit, for example an electrolytic capacitor

    DE3213110A1

  • Method and equipment for determining polarity of electrolytic polarized capacitor

    JP2001210567A