CN103968936B - Based on difference Micro-Variation Capacitance shaft tower vibration monitoring device - Google Patents
Based on difference Micro-Variation Capacitance shaft tower vibration monitoring device Download PDFInfo
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- CN103968936B CN103968936B CN201410219464.1A CN201410219464A CN103968936B CN 103968936 B CN103968936 B CN 103968936B CN 201410219464 A CN201410219464 A CN 201410219464A CN 103968936 B CN103968936 B CN 103968936B
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Abstract
The present invention is a kind of based on difference Micro-Variation Capacitance shaft tower vibration monitoring device, solves existing detection equipment and there is the problems such as accuracy of detection is low, expensive, Detection results is undesirable.This device is that a differential capacitance module is respectively installed in both sides, angle bar face with each dimension perpendicular on shaft tower, and two differential capacitance modules in each dimension are linked in differential capacitance detection circuit, the input of differential capacitance detection circuit is connected with the output of D/A conversion module, the output of differential capacitance detection circuit is connected with the input of AD conversion module, the output of AD conversion module is connected with the input of single-chip microcomputer, and the output of single-chip microcomputer is connected with the input of D/A conversion module.Apparatus of the present invention are reasonable in design, simple in construction, with low cost, easy for installation, using effect is good, and this device can measure the Vibration Condition of three dimensions of shaft tower, and certainty of measurement is higher, well ensure that the safe operation of transmission line of electricity, is worth of widely use.
Description
Technical field
The present invention relates to shaft tower vibration detection technology field, specifically a kind of based on difference Micro-Variation Capacitance shaft tower vibration monitoring device.
Background technology
Economical develops the higher demand that proposes supply of electric power rapidly.For meeting electricity consumption, Utilities Electric Co. builds a large amount of overhead transmission lines, and Large Copacity and long-distance transmission line come into operation successively.Because transmission line of electricity crosses over region greatly, landform and weather complexity, reliably causes many potential risks with safety to transmit electricity, so the real-time of transmission line of electricity is monitored the particularly important of change.High-voltage power transmission tower under wild environment, is often subject to the interference of natural cause such as wind, conductor galloping etc., and human factor, such as disconnected wood and the impact of construction implement, thus causes shaft tower to vibrate.Shaft tower vibration easily causes various accidents, even can affect the safe operation of transmission line of electricity, it is therefore desirable to be monitored the Vibration Condition of shaft tower time serious.
In prior art, mostly using acceleration transducer, by the computing of acceleration and then the Vibration Condition of learning shaft tower, this mode has clearly disadvantageous, it is simply that sensitivity is the poorest, and expensive, is not suitable for installing and using on a large scale；In patent 201716103U, using differential capacitance to measure shaft tower vibration, there are two problems, one is that single differential capacitance module cannot measure shaft tower Vibration Condition completely, and two is that single differential capacitance certainty of measurement is not high enough.
Summary of the invention
The invention aims to solve above-mentioned problems of the prior art, two provide a kind of based on difference Micro-Variation Capacitance shaft tower vibration monitoring device.
The present invention is achieved through the following technical solutions:
A kind of based on difference Micro-Variation Capacitance shaft tower vibration monitoring device, including differential capacitance module, AD conversion module, D/A conversion module, single-chip microcomputer and supply module；
Differential capacitance module is made up of a fixed capacity pole and a motion capacitance pole, and supply module is respectively AD conversion module, D/A conversion module and single-chip microcomputer and provides power supply；
The vibration of shaft tower is divided into left and right, front and back, upper and lower three dimensions, the one end, fixed capacity pole each side fixing a differential capacitance module and differential capacitance module in the first angle bar face vertical with shaft tower side-to-side vibrations direction is fixed with the first angle bar face, two electric capacity of these two differential capacitance modules are accessed in the first differential capacitance detection circuit, the input of the first differential capacitance detection circuit is connected with an output of D/A conversion module, the output of the first differential capacitance detection circuit is connected with an input of AD conversion module, the output of AD conversion module is connected with the input of single-chip microcomputer, the output of single-chip microcomputer is connected with the input of D/A conversion module；Wherein, the first described differential capacitance detection circuit includes a transformer, the two ends, former limit of transformer are connected (input that former limit is differential capacitance detection circuit of transformer) with D/A conversion module output, the secondary two ends of transformer respectively connect the electric capacity (surveying the electric capacity of two differential capacitance modules with dimension) of a differential capacitance module, the central point of the phase contact of two electric capacity other ends and transformer secondary forms the output of differential capacitance detection circuit, and this output is connected with an input of AD conversion module.
After in face of second angle bar vertical with shaft tower porpoise direction, each one end, fixed capacity pole fixing a differential capacitance module and differential capacitance module, both sides is fixed with the second angle bar face, two electric capacity of these two differential capacitance modules are accessed in the second differential capacitance detection circuit, the input of the second differential capacitance detection circuit is connected with an output of D/A conversion module, the output of the second differential capacitance detection circuit is connected with an input of AD conversion module, the output of AD conversion module is connected with the input of single-chip microcomputer, the output of single-chip microcomputer is connected with the input of D/A conversion module；Wherein, the structure of the second differential capacitance detection circuit is identical with the first differential capacitance detection circuit with connected mode.
Untouchable fixing in the third angle untouchable upper and lower both sides each fixed capacity pole one end of fixing a differential capacitance module and differential capacitance module vertical with shaft tower up-down vibration direction and the third angle, two electric capacity of these two differential capacitance modules are accessed in the 3rd differential capacitance detection circuit, the input of the 3rd differential capacitance detection circuit is connected with an output of D/A conversion module, the output of the 3rd differential capacitance detection circuit is connected with an input of AD conversion module, the output of AD conversion module is connected with the input of single-chip microcomputer, the output of single-chip microcomputer is connected with the input of D/A conversion module；Wherein, the structure of the 3rd differential capacitance detection circuit is identical with the first differential capacitance detection circuit with connected mode.
During work, illustrate as a example by shaft tower side-to-side vibrations: when shaft tower side-to-side vibrations, analyze the situation of change of two differential capacitance modules of the left and right sides.When shaft tower vibrates to the left, left side differential capacitance block two die opening increases, and electric capacity increases, and differential capacitance module two die opening on right side reduces, and electric capacity reduces.The two electric capacity accesses the first differential capacitance detection circuit, the given frequency that the input of the first differential capacitance detection circuit fetches from D/A conversion module output is sinusoidal wave, the character utilizing the first differential capacitance detection circuit draws the relation of the difference value of output voltage and two electric capacity, the constantly vibration of shaft tower makes the first differential capacitance detection circuit electric bridge difference output constantly change, thus the frequency of output voltage the most just reflects the frequency of shaft tower vibration.Utilize AD conversion module that the output voltage of the first differential capacitance detection circuit is converted into data signal and pass to single-chip microcomputer, utilize SCM program to calculate electric voltage frequency.Front and back, the Vibration Condition of upper and lower two dimensions is analyzed ibid.
Apparatus of the present invention are reasonable in design, simple in construction, with low cost, easy for installation, using effect is good, and this device can measure the Vibration Condition of three dimensions of shaft tower, and certainty of measurement is higher, well ensure that the safe operation of transmission line of electricity, is worth of widely use.
Accompanying drawing explanation
Fig. 1 is the structural representation of differential capacitance module in apparatus of the present invention.
Fig. 2 is the differential capacitance module scheme of installation surveying left and right dimension in apparatus of the present invention.
Fig. 3 be apparatus of the present invention are surveyed before and after the differential capacitance module scheme of installation of dimension.
Fig. 4 is the differential capacitance module scheme of installation surveying upper and lower dimension in apparatus of the present invention.
Fig. 5 is the schematic diagram of differential capacitance detection circuit in apparatus of the present invention.
Fig. 6 is that each module of apparatus of the present invention connects block diagram.
In figure: 1-differential capacitance module, 2-fixed capacity pole, 3-motion capacitance pole, 4-the first angle bar face, 5-the second angle bar face, 6-the third angle are untouchable.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figures 1 to 6, a kind of based on difference Micro-Variation Capacitance shaft tower vibration monitoring device, including differential capacitance module 1, AD conversion module, D/A conversion module, single-chip microcomputer and supply module；
Differential capacitance module 1 is made up of a fixed capacity pole 2 and a motion capacitance pole 3, and supply module is respectively AD conversion module, D/A conversion module and single-chip microcomputer and provides power supply；
The vibration of shaft tower is divided into left and right, front and back, upper and lower three dimensions, the one end, fixed capacity pole each side fixing a differential capacitance module 1 and differential capacitance module 1 in the first angle bar face 4 vertical with shaft tower side-to-side vibrations direction is fixed with the first angle bar face 4, two electric capacity of these two differential capacitance modules 1 are accessed in the first differential capacitance detection circuit, the input of the first differential capacitance detection circuit is connected with an output of D/A conversion module, the output of the first differential capacitance detection circuit is connected with an input of AD conversion module, the output of AD conversion module is connected with the input of single-chip microcomputer, the output of single-chip microcomputer is connected with the input of D/A conversion module；
Before and after the second angle bar face 5 vertical with shaft tower porpoise direction, each one end, fixed capacity pole fixing a differential capacitance module 1 and differential capacitance module 1, both sides is fixed with the second angle bar face 5, two electric capacity of these two differential capacitance modules 1 are accessed in the second differential capacitance detection circuit, the input of the second differential capacitance detection circuit is connected with an output of D/A conversion module, the output of the second differential capacitance detection circuit is connected with an input of AD conversion module, the output of AD conversion module is connected with the input of single-chip microcomputer, the output of single-chip microcomputer is connected with the input of D/A conversion module；
Fix with the third angle untouchable 6 in each one end, fixed capacity pole fixing a differential capacitance module 1 and differential capacitance module 1, untouchable about 6 both sides of the third angle vertical with shaft tower up-down vibration direction, two electric capacity of these two differential capacitance modules 1 are accessed in the 3rd differential capacitance detection circuit, the input of the 3rd differential capacitance detection circuit is connected with an output of D/A conversion module, the output of the 3rd differential capacitance detection circuit is connected with an input of AD conversion module, the output of AD conversion module is connected with the input of single-chip microcomputer, the output of single-chip microcomputer is connected with the input of D/A conversion module.
Claims (1)
1. one kind based on difference Micro-Variation Capacitance shaft tower vibration monitoring device, it is characterised in that: include differential capacitance module (1), AD conversion module, D/A conversion module, single-chip microcomputer and supply module；
Differential capacitance module (1) is made up of a fixed capacity pole (2) and a motion capacitance pole (3), and supply module is respectively AD conversion module, D/A conversion module and single-chip microcomputer and provides power supply；
The vibration of shaft tower is divided into left and right, front and back, upper and lower three dimensions, the one end, fixed capacity pole each side fixing a differential capacitance module (1) and differential capacitance module (1) in the first angle bar face (4) vertical with shaft tower side-to-side vibrations direction is fixed with the first angle bar face (4), two electric capacity of these two differential capacitance modules (1) are accessed in the first differential capacitance detection circuit, the input of the first differential capacitance detection circuit is connected with an output of D/A conversion module, the output of the first differential capacitance detection circuit is connected with an input of AD conversion module, the output of AD conversion module is connected with the input of single-chip microcomputer, the output of single-chip microcomputer is connected with the input of D/A conversion module；
Before and after in the second angle bar face (5) vertical with shaft tower porpoise direction, each one end, fixed capacity pole fixing a differential capacitance module (1) and differential capacitance module (1), both sides is fixed with the second angle bar face (5), two electric capacity of these two differential capacitance modules (1) are accessed in the second differential capacitance detection circuit, the input of the second differential capacitance detection circuit is connected with an output of D/A conversion module, the output of the second differential capacitance detection circuit is connected with an input of AD conversion module, the output of AD conversion module is connected with the input of single-chip microcomputer, the output of single-chip microcomputer is connected with the input of D/A conversion module；
Fix with the third angle untouchable (6) in each one end, fixed capacity pole fixing a differential capacitance module (1) and differential capacitance module (1), the third angle untouchable (6) vertical with shaft tower up-down vibration direction both sides up and down, two electric capacity of these two differential capacitance modules (1) are accessed in the 3rd differential capacitance detection circuit, the input of the 3rd differential capacitance detection circuit is connected with an output of D/A conversion module, the output of the 3rd differential capacitance detection circuit is connected with an input of AD conversion module, the output of AD conversion module is connected with the input of single-chip microcomputer, the output of single-chip microcomputer is connected with the input of D/A conversion module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410219464.1A CN103968936B (en) | 2014-05-23 | 2014-05-23 | Based on difference Micro-Variation Capacitance shaft tower vibration monitoring device |
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| CN201410219464.1A CN103968936B (en) | 2014-05-23 | 2014-05-23 | Based on difference Micro-Variation Capacitance shaft tower vibration monitoring device |
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| CN105444871B (en) * | 2015-12-11 | 2019-02-01 | 天津大学 | Condenser type pipe/rod-like articles vibrate on-line measurement device and method |
| CN106705937B (en) * | 2016-12-13 | 2019-11-15 | 国家电网公司 | Voltage shaft tower inclination monitoring system and method based on differential capacitance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DK2103915T3 (en) * | 2008-03-17 | 2017-02-20 | Siemens Ag | Device and method for determining a resonant frequency of a wind turbine tower |
| CN201417182Y (en) * | 2009-06-19 | 2010-03-03 | 国网电力科学研究院武汉南瑞有限责任公司 | On-line monitoring device of ice coverage prewarning and dynamic capacity-increasing system of transmission lines |
| CN201716103U (en) * | 2010-06-13 | 2011-01-19 | 重庆市电力建设总公司 | Vibration detection device for micro-variation capacitance pole tower |
| CN102155987B (en) * | 2010-12-31 | 2012-06-13 | 北京遥测技术研究所 | Differential capacitor type micro-vibration sensor |
| CN203837809U (en) * | 2014-05-23 | 2014-09-17 | 国家电网公司 | Differential-micro-change-capacitor-based type pole tower vibration monitoring device |
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