Data acquisition device in surge protection device

Abstract

The invention belongs to a data acquisition device in an urge protection device and relates to an emergent protection circuit device for limiting over-current or over-voltage so that a circuit is not switched off. The data acquisition device comprises a data acquisition circuit part, a data buffering circuit part, a single chip microcomputer and a service life display circuit part, wherein the data acquisition circuit part mainly comprises an interface inserting needle, a chip AD8138 and a chip AD9238; the data buffering circuit part mainly comprises an FIFO (First-In First-Out) register and two latches; the service life display circuit part mainly comprises a light emitting diode and a resistor; and a service life display program and a data acquisition processing program are stored in the single chip microcomputer. By virtue of the device, the problem that the data acquisition device and an online monitoring device, which specially aim at an SPD, are lacked in the prior art is solved; and meanwhile, the defect that the cost of control chips taking a digital signal processor (DSP) and a field programmable gate array (FPGA) as cores is relatively high is overcome.

Description

technical field [0001] The technical proposal of the present invention relates to an emergency protection circuit device for limiting overcurrent or overvoltage without cutting off the circuit, specifically a data acquisition device in a surge protector. Background technique [0002] Surge Protective Device (hereinafter referred to as SPD), also known as surge protector, is a non-linear protective device used to limit transient overvoltage and guide discharge surge current in live system to protect withstand voltage level Low electrical or electronic systems are protected from lightning strikes and lightning electromagnetic pulses or operating overvoltage damage. In recent years, with the improvement of building automation level, SPD is an important anti-lightning electromagnetic pulse device, and its safety and reliability are directly related to the safety of electronic information systems in buildings. [0003] At present, there are some portable SPDs on the market. The ...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: provide the data acquisition device in the surge protector, be controlled by the one-chip computer, utilize FIFO (being first-in-first-out) register and latch as the high-speed AD sampling circuit of data buffer zone, realized high-speed The connection between AD sampling and the data processing of the slower single-chip microcomputer, the leakage current data collected by the single-chip processing is compared with the preset impact number value, the corresponding number of light-emitting diodes is lit, and the aging degree of the SPD is evaluated and the early warning is overcome. The prior art lacks the data acquisition device and on-line monitoring device specially aimed at SPD, and takes the digital signal processor (DSP) and field programmable logic gate array (FPGA) as the defect of the high cost of the control chip of the core at the same time

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