Novel electric quantity sensor isolation method
A power sensor, a new type of technology, applied in the direction of voltage/current isolation, measuring electrical variables, instruments, etc., can solve the problems of complex circuit lines and high cost, and achieve the effects of simplifying the circuit, facilitating maintenance, and reducing costs
Pending Publication Date: 2022-01-07
南京史利姆电子科技有限公司
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[0004] The purpose of the present invention is to solve the problems of circuit complexity and high cost in the original power sensor isolation method, and provide a new type of power sensor isolation method with simple structure, low cost and convenient maintenance
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[0016] The technical solution of this patent will be described in further detail below in conjunction with the accompanying drawings and specific examples. A method for isolating a novel power sensor, comprising: a power supply 1, a DC / DC module 2, a voltage stabilizing module 3, a voltage dividing module 4, an amplifying module 5, an optical coupling isolation module 6, a conversion circuit module 7, and a zeroing module 8, AM module 9, output module 10;
[0017] The power supply 1 supplies power to each DC / DC module 2 and the voltage stabilizing module 3, and the high voltage is converted into a low voltage of tens of millivolts after passing through the voltage dividing module 3, and the low voltage is amplified by the amplifying module 5, and the amplified signal Isolation is carried out by the optocoupler isolation module 6, and then the amplified voltage signal is converted into a current signal by the conversion circuit module 7, and the current signal is adjusted by th...
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The invention provides a novel electric quantity sensor isolation method. A power supply, a DC / DC module, a voltage stabilization module, a voltage division module, an amplification module, an optical coupling isolation module, a conversion circuit module, a zero setting module, an amplitude modulation module and an output module are included. The beneficial effects are that the DC / DC module is used to replace an RC oscillation circuit, the cost is reduced, and the reliability is improved; an optical coupler linear isolation circuit is used for replacing a modulation-demodulation circuit, so that a collected input signal is amplified by an integrated circuit and then is directly input into a main loop for processing through optical coupler isolation, the circuit is simplified, and the maintenance is convenient; in addition, direct-current voltage and alternating-current voltage can be tested, and practicability is higher.
Description
technical field [0001] The invention relates to the field of intelligent detection and control, in particular to an isolation method of a novel electric quantity sensor. Background technique [0002] The power sensor for detecting voltage, in principle, uses RC circuit in the circuit to generate an oscillating circuit, enters the circuit for detecting high voltage through high-frequency transformer 1, and then uses high-frequency diode rectification to generate an isolated power supply to supply power to the integrated circuit, and collects The signal is loaded in the high-frequency signal, and is transmitted back to the main circuit by the high-frequency transformer 2, and the data is restored by the demodulator, and after the circuit is processed, a 4-20mA output is formed. [0003] This detection method is to generate an isolated power supply through a high-frequency signal, and use the high-frequency signal to perform high-voltage electrical insulation isolation between ...
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IPC IPC(8): G01R19/00G01R15/14
CPCG01R19/00G01R15/14
Inventor 王学张翠平吴克军王卫国王进升王京港
Owner 南京史利姆电子科技有限公司