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Signal acquisition controller

A signal acquisition and controller technology, applied in the direction of instruments, measuring devices, measuring electrical variables, etc., can solve the problems of high time cost, slow judgment of overcurrent state, high equipment cost, etc., to reduce device cost, reduce failure rate, Effect of Shortening Signal Acquisition Time

Active Publication Date: 2012-06-27
BEIJING HOLLYSYS AUTOMATION & DRIVE
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Problems solved by technology

[0003] From the above content, it can be seen that due to the conversion process of AC to DC in the existing technology, the judgment of the overcurrent state is slow and the time cost is large, and conversion devices such as transmitters are needed to complete the conversion from AC to DC. Conversion, equipment cost is also high

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Embodiment Construction

[0030] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention.

[0031] It should be noted that, if there is no conflict, the embodiments of the present invention and various features in the embodiments can be combined with each other, and all are within the protection scope of the present invention. In addition, the steps shown in the flow diagrams of the figures may be performed in a computer system, such as a set of computer-executable instructions, and, although a logical order is shown in the flow diagrams, in some cases, the sequence may be different. The steps shown or described are performed in the order herein.

[0032] figure 1 It is a composition schematic diagram of an embodiment of the signal acquisition controller of...

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Abstract

The invention discloses a signal acquisition controller, which quickly judges the overcurrent state of a three-phase alternating current. The signal acquisition controller comprises an input / output board and a central processing unit board, wherein the input / output board is used for receiving an alternating-current signal acquired by peripheral equipment on the three-phase alternating current, and conditioning the alternating-current signal to acquire an alternating-current conditioning signal, and is also used for executing the circuit protection action according to a protective signal sent by the central processing unit board; the central processing unit board is used for receiving a judging threshold value inputted by a user and judging whether the three-phase alternating current is inthe overcurrent state or not according to the judging threshold value and the alternating-current conditioning signal; if the three-phase alternating current is in the overcurrent state, the central processing unit board generates the protective signal and judges the protective signal is a quick protective signal or not; and if the protective signal is the quick protective signal, the protective signal is sent to the input / output board, otherwise the protective signal is sent to the peripheral equipment. The method and the device acquire and judge the alternating current directly, shorten thesignal acquisition time and the protective time during overcurrent.

Description

technical field [0001] The invention relates to a three-phase alternating current protection technology, in particular to a signal acquisition controller. Background technique [0002] The existing three-phase AC current acquisition and overcurrent protection generally collect AC signals and convert them into DC signals, and then a circuit such as PLC performs current detection on the DC signals to determine whether the DC signals exceed the preset DC threshold. In this way, it is judged whether the AC signal is in an overcurrent state. When the DC signal exceeds the preset DC threshold, it is determined that the AC signal is in an overcurrent state, and appropriate protection measures are taken as required. [0003] From the above content, it can be seen that due to the conversion process of AC to DC in the existing technology, the judgment of the overcurrent state is slow and the time cost is large, and conversion devices such as transmitters are needed to complete the co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/08G01R19/165
Inventor 徐毓军徐昌荣王国锋石鹏张军侯爱林
Owner BEIJING HOLLYSYS AUTOMATION & DRIVE
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