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Device for testing axial displacement of hydroelectric generating set and working method therefor

A generator set, axial displacement technology, applied in measurement devices, radio wave measurement systems, sound wave re-radiation and other directions, can solve the problem of not considering air, unable to send detection results to monitoring terminals, unable to manually set alarm limits, query alarms History and other issues, to achieve the effect of remarkable effect, high calculation accuracy and speed, and simple structure

Inactive Publication Date: 2010-05-12
HOHAI UNIV CHANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this device is that, on the one hand, the device does not consider the influence of factors such as ambient temperature, humidity, dust amount, wind speed, etc. that the speed of sound in the air may be subjected to; on the other hand, the device only uses CPLD to collect ultrasonic propagation time And through the digital tube to display the distance of the target object, the detection result cannot be sent to the monitoring terminal, and the alarm limit cannot be manually set, the alarm history can be checked, and the measurement data can be checked in real time, etc.
Obviously, this device cannot meet the accuracy requirements of the axial displacement detection of the hydro-generator set, and can only be used in occasions with low detection accuracy requirements such as motor vehicle reversing anti-collision, blind pathfinding, and robot positioning.

Method used

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  • Device for testing axial displacement of hydroelectric generating set and working method therefor
  • Device for testing axial displacement of hydroelectric generating set and working method therefor
  • Device for testing axial displacement of hydroelectric generating set and working method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] See Figure 1-2 , the detecting device of the axial displacement of the hydro-generator set in the present embodiment comprises a central control unit 1, a transmission drive circuit 2 connected to the ultrasonic output control terminal of the central control unit 1, and an echo signal receiving unit 1 of the central control unit 1. The receiving drive circuit 3 connected to the terminal, the detection result output device connected to the detection result output terminal of the central control unit 1, the first transducer 21 and the second transducer 22. The output end of the transmitting drive circuit 2 is connected to the input end of the first transducer 21, and the input end of the receiving drive circuit 3 is connected to the output end of the first transducer 21; the output end of the transmitting drive circuit 2 is connected to the second transducer The input end of the second transducer 22 is connected, the output end of the second transducer 22 is connected wi...

Embodiment 2

[0051] See image 3 , the central control unit 1 includes a single-chip microcomputer 11 and an application specific integrated circuit ASIC 12 bidirectionally electrically connected with the single-chip microcomputer 11 .

[0052] The ultrasonic output control end of the central control unit 1 is the ultrasonic output control end of the application-specific integrated circuit ASIC 12, the echo signal receiving end of the central control unit 1 is the echo signal receiving end of the application-specific integrated circuit ASIC12, and the central control unit 1 The detection result output terminal is the detection result output terminal of the single-chip microcomputer 11 .

[0053] The application-specific integrated circuit ASIC 12 is used to control the transmission and reception of ultrasonic narrow burst signals to capture the echoes used by the first transducer 21 and the second transducer 22 during the respective transmission and reception of ultrasonic narrow burst sig...

Embodiment 3

[0062] See Figure 5 , On the basis of the above-mentioned embodiment, single-chip microcomputer 11 is 8 single-chip microcomputers namely 8051 single-chip microcomputer U1, and single-chip microcomputer 11 is connected with application-specific integrated circuit ASIC 12 namely CPLD U2 bidirectional electricity through eight in-phase three-state bus transceivers U13. Eight in-phase three-state bus transceivers are used, so that the data communication terminals AD0-AD7 of the single-chip microcomputer U1 can be multiplexed by the data communication terminals of the test result output device, and only one 8-bit single-chip microcomputer can be used to reduce costs. The ultrasonic output control terminal of CPLD U2 is the Vi(S) terminal of U2 in the figure, the echo signal receiving terminal of CPLD U2 is the V_flec terminal of U2 in the figure, and the detection result output terminal of the single-chip microcomputer 11 is the data communication terminal AD0 of U1 in the figure ...

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PUM

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Abstract

This invention relates to one water wheel motor axis displacement test device and its work method, wherein, the device comprises central control unit, emission drive circuit, receive drive circuit, test result output device, first and second energy exchangers, wherein, the second exchanger is set with reflection board; central control unit computes current speed through caught time information; combining first exchanger time information to compute current water motor axis to output motor axis displacement information.

Description

technical field [0001] The invention relates to a detection device and a working method for the axial displacement of a hydroelectric generating set of a hydropower station. Background technique [0002] With the gradual development of my country's hydropower resources, large and medium-sized hydraulic turbines are continuously put into production, which makes the proportion of large hydraulic turbines in the entire power grid more and more large. The average annual power generation time is prolonged and the maintenance time is shortened. Once an accident stops, the economic loss caused is extremely high. serious. Therefore, it is very necessary to ensure the normal and safe operation of large-scale hydraulic turbines, monitor their status, find fault symptoms in time, and carry out fault diagnosis research on hydraulic turbines. In the research of fault diagnosis, the study of turbine vibration is an important index directly related to the normal operation of the hydroelect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S15/08
Inventor 朱昌平刘德有单鸣雷
Owner HOHAI UNIV CHANGZHOU