Processing method of nuclear-grade canned motor pump rotation speed signals

A technology of speed signal and processing method, applied in general control systems, instruments, computer control, etc.

Active Publication Date: 2017-09-22
NUCLEAR POWER INSTITUTE OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a processing method for the

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  • Processing method of nuclear-grade canned motor pump rotation speed signals

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Embodiment

[0028] Such as figure 1 As shown, the present invention is a processing method for the rotational speed signal of a nuclear-level shielded pump. The input rotational speed signal of a nuclear-level shielded pump is first subjected to transient voltage suppression and electrostatic protection through a protection circuit to prevent damage to subsequent circuits by external voltage signals. Then the filter circuit performs bandwidth filtering to filter out the frequency signals other than the working frequency of the speed signal; the filtered signal is classified by the speed pulse classification circuit according to the peak value, and then sent to the amplifier circuit for signal amplification, and the speed pulse classification circuit will convert the speed signal The category information is sent to the processing core; the processing core applies different signal instructions to the gain control circuit according to the category of the speed signal to control the amplificat...

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Abstract

The invention discloses a processing method of nuclear-grade canned motor pump rotation speed signals. The processing method comprises the following steps that: 1) inputted nuclear-grade canned motor pump rotation speed signals are subjected to the transient voltage suppression and electrostatic protection of a protection circuit; 2) the inputted rotation speed signals are subjected to the filtering processing of a bandwidth filtering circuit; 3) after being filtered, the inputted rotation speed signals are classified according to peak values through a rotation speed pulse classification circuit, and the rotation speed signals are subjected to multistage amplification according to different classifications; 4) the amplified rotation speed signals are shaped so as to form unipolar square wave signals, and the unipolar square wave signals are sent to a core processing unit; and 5) the core processing unit sends a rotation speed value to a bus module, and the bus module processes the rotation speed value and realizes bus type output. With the processing method adopted, the rotation speed signals can be amplified according to the peak values, and signal amplification adopts a multistage small-multiple amplification scheme, and therefore, distortion in a pulse amplification process can be decreased.

Description

technical field [0001] The invention relates to the field of processing the rotational speed signal of a reactor coolant pump, in particular to a processing method for the rotational speed signal of a nuclear-level shielded pump. Background technique [0002] The reactor coolant pumps in third-generation nuclear power plants and new nuclear power plants mostly adopt the canned pump type, and the speed signal is listed as a shutdown protection parameter. The speed measurement of nuclear-grade shielded pumps generally adopts the principle of electromagnetic induction. Every time the shielded pump rotates, the corresponding speed sensor generates a speed signal, and the speed of the shielded pump can be obtained by calculating the interval time of the speed signal. [0003] The speed sensor of some nuclear-level shielded pumps adopts a sleeve-type design, and the fixed pipe seat penetrates into the pump body. The volume of the speed sensor is restricted, and the number of coils...

Claims

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Application Information

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IPC IPC(8): G05B19/042
CPCG05B19/0425G05B2219/2604G05B2219/2612
Inventor 朱毖微吕鑫何亮青先国陈智郑嵩华吴茜徐思捷
Owner NUCLEAR POWER INSTITUTE OF CHINA
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