Multi-loop current type detection module
A detection module and current-type technology, applied in the field of multi-circuit current-type detection modules, can solve the problem of multiple loops in the power distribution system
Inactive Publication Date: 2012-02-22
福建俊豪电子有限公司
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Problems solved by technology
[0002] Most electrical fires are caused by long-term use of aging lines or overcurrent, but traditional circuit breaker products can only collect three-phase current signals alone, which cannot meet the practical problems of many circuits in the power distribution system
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[0012] Such as figure 1 As shown, the multi-loop current detection module of the present invention includes a three-phase current transformer signal acquisition circuit 1 and a single-chip microcomputer control circuit 2, and the output signals of the multi-channel three-phase current transformer signal acquisition circuit 1 are sequentially rectified and adjusted by the operational amplifier Circuit 11, analog switch circuit 12, A / D data conversion circuit 13 are transmitted to single-chip microcomputer control circuit 2, controlled by single-chip microcomputer control circuit 2 and output to RS485 communication interface circuit 3, carrier signal phase-locking circuit 5, described carrier signal phase-locking circuit The output signal of 5 is sent to the carrier signal decoding circuit 7 through the frequency selective amplifier circuit 6, and the single-chip microcomputer control circuit 2 and the watchdog circuit 8 have two-way data transmission.
[0013] The module uses a...
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The invention relates to a multi-loop current type detection module, which comprises a three-phase current transformer signal collection circuit and a singlechip control circuit, wherein output signals of the multi-loop three-phase current transformer signal collection circuit are transmitted to the singlechip control circuit sequentially through an operation amplification rectifying regulation circuit, an analog switch circuit and an analog-to-digital (A / D) data conversion circuit and are controlled by the singlechip control circuit to be output to an RS485 communication interface circuit and a carrier signal lock phase circuit, and the output signals of the carrier signal lock phase circuit are sent to a carrier signal decoding circuit through a frequency selecting amplifier circuit. The multi-loop current type detection module adopts the multi-loop circulation detection, warning signals are sent to a host machine through carrier signals or an RS485 bus through the integral judgment of a singlechip, and the warning is effectively carried out in time in the first time.
Description
technical field [0001] The invention relates to a detection module, in particular to a multi-loop current type detection module. Background technique [0002] Most electrical fires are caused by long-term use of aging lines or overcurrent, but traditional circuit breaker products can only collect three-phase current signals alone, which cannot meet the practical problems of many circuits in the power distribution system. Contents of the invention [0003] The purpose of the present invention is to overcome the above disadvantages and provide a multi-loop current type detection module. [0004] The technical solution adopted by the present invention to solve the technical problem is: a multi-loop current detection module, including a three-phase current transformer signal acquisition circuit and a single-chip microcomputer control circuit, the output signal of the multi-channel three-phase current transformer signal acquisition circuit Sequentially through the op-amp recti...
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IPC IPC(8): G01R19/25G01R31/02G08C19/00
Inventor 傅俊豪傅加发傅汉水傅哲龙
Owner 福建俊豪电子有限公司