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Control rod rod position measuring system based on electric vortex sensor

An eddy current sensor and measurement system technology, applied in the field of reactor measurement and control, can solve the problems of low measurement accuracy, slow response speed, difficult maintenance, etc., and achieve the effects of meeting interchangeability requirements, fast response speed, and avoiding loss.

Active Publication Date: 2004-10-20
TSINGHUA UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low measurement accuracy, slow response speed, complex structure and difficult maintenance in the existing rod position measurement system. The present invention provides a control rod position measurement system based on eddy current sensors

Method used

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  • Control rod rod position measuring system based on electric vortex sensor
  • Control rod rod position measuring system based on electric vortex sensor

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Embodiment Construction

[0012] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0013] The control rod position measurement system based on the eddy current sensor provided by the present invention is composed of an eddy current sensor 1, a control rod assembly 2, a sprocket-chain device 3, a precision screw-nut assembly 4, and a measured body 5. The sensor 1 includes a sensor probe 6 , a signal transmission cable 7 with an electrical penetration 10 and a preamplifier 8 , and the precision screw-nut assembly 4 includes a precision screw 11 , a nut 12 and its bracket 13 . The eddy current sensor 1 is a non-contact displacement and vibration sensor based on the high-frequency eddy current effect, which can perform precise non-contact measurement of the motion parameters of metal objects entering its measurement range. In order to adapt to the helium environment of high temperature, high pressure and radioactivity in the reactor, the probe ...

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Abstract

The system includes control rod assembly, chain wheel-link belt, current vortex sensor, precision lead screw-nut assembly and body to be measured. The said precision lead screw-nut assembly includes precision lead screw, nut and support. Precision lead screw is connected to chain wheel, and the body to be measured is fixed on the nut. The current vortex sensor includes probe of sensor, signal transmission cable and preamplifier. Sealed penetration piece welded to pressure borderline of a loop is setup in middle of the signal transmission cable. Probe of sensor fixed on the said support is corresponding to the body to be measured. The advantages are high measurement accuracy, fast speed, stable operation and easy of maintenance.

Description

technical field [0001] The invention belongs to the technical field of reactor measurement and control, and relates to a rod position measurement system of a reactor control rod, in particular to a reactor control rod rod position measurement system based on an eddy current sensor. Background technique [0002] Control rods and their driving mechanisms are important devices to ensure the safe operation of reactors. Under normal working conditions, by adjusting the position of the control rods, the normal start-up and shutdown of the reactor can be realized, so that the reactor can operate at a given power level or the reactor power can be adjusted; core reactivity, thereby enabling emergency shutdown. The rod position measurement system is one of the most important systems in the device, and its reliability and safety are related to the normal operation and safety of the entire reactor. [0003] At present, there are mainly the following high-temperature gas-cooled reactor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/02G21C7/14G21C17/10
CPCY02E30/39Y02E30/30
Inventor 刁兴中张作义于溯源石磊时振刚查美生杨国军
Owner TSINGHUA UNIV
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