CN202748234U - Power transmission iron tower intensity and vibration off-line intelligent inspection tour system - Google Patents

Abstract

The utility model discloses an off-line intelligent patrol inspection system for the strength and vibration of a transmission iron tower, which comprises an off-line intelligent inspection instrument for the strength and vibration of an electric transmission tower. , a dual-channel signal conditioning instrument and a dual-channel dynamic signal acquisition processor, the mobile strain sensor and the accelerometer are respectively connected to the dual-channel signal conditioning instrument, the dual-channel signal conditioning instrument is connected to the dual-channel dynamic signal acquisition processor, and the dual-channel The dynamic signal acquisition processor is connected with the data processing device. The utility model can be monitored on-line, has high accuracy, is safe and reliable, can be used for daily detection of power transmission lines, saves manpower and material resources, and is used to replace the current state of relying on visual inspection for line inspections.

Description

Electric power pylon intensity and vibration off-line intelligent inspection system

Technical field

The utility model relates to a kind of electric power monitoring technology, relates in particular to a kind of electric power pylon intensity and vibration off-line intelligent inspection system.

Background technology

The factors such as electric transmission pole tower system is subjected to high wind, wraps up in ice, earthquake, foundation settlement, landslide, goaf geology variation cause overstressing or vibrating fatigue, and strength character descends even the burst accident of falling the tower consequently produces heavy economic losses in the phase under arms.The main line attendant that relies on is by estimating the variation of finding steel tower at present, and the reliability of steel tower does not have corresponding database and appraisal procedure.

Chinese patent ZL200820184986.2 discloses a kind of electric transmission pole tower ambient vibration state on_line monitoring and Wireless Long-range Transmission System, it comprises collection in worksite station and main website, the collection in worksite station comprises signal condition instrument, capture card, industrial control computer and wireless network card, vibration transducer is connected with capture card by the signal condition instrument, wind speed wind direction sensor and humidity temperature pickup are connected on the capture card, capture card extremely reaches with Industry Control and is connected, be connected with wireless network card at industrial control computer, main website comprises receive data by wireless system and digital data recording system.

Chinese patent ZL200920142968.2 discloses a kind of electric transmission pole tower system of condition monitoring, comprise the Power supply unit, sensor unit, signal condition and collecting unit, embedded board computing machine, wireless data transmission unit, remote monitoring center form.System's use solar panel adds battery pack and unites power supply, the vibration signal at a plurality of positions of synchronous acquisition electric transmission pole tower and the weather data of electric transmission pole tower surrounding environment are stored and are shown through cdma mobile communication Internet Transmission to remote monitoring center by wireless data transmission unit.By the variation of detected characteristics parameter, and then realization is to the real-time detection of electric transmission pole tower safety.

But above-mentioned two patents have following shortcoming:

1. both are applicable to on-line monitoring, can not be applicable to off-line and patrol and examine.The on-line monitoring system of vibration and intensity is at present also in the development test stage, and with high costs, poor reliability not yet possesses the possibility that electrical network promotes the use.

2. above-mentioned two patents include only vibration, do not comprise intensity.

3. above-mentioned two patent monitors adopt 220V ac power supply or solar powered, can not be used for patrolling and examining.

4. position, above-mentioned two patent monitoring points can only be fixed on some positions, and the monitoring point is few.

The utility model content

The purpose of this utility model is exactly in order to address the above problem, and a kind of electric power pylon intensity and vibration off-line intelligent inspection system are provided, and this system can off-line monitoring, accuracy is high, safe and reliable, can be used for the transmission line of electricity routine testing, rely on the state of range estimation to substitute present line data-logging.The utlity model has and can add up and analysis and assessment steel tower reliability, building database guarantees the advantage of the normal operation of line powering.

To achieve these goals, the utility model adopts following technical scheme:

A kind of electric power pylon intensity and vibration off-line intelligent inspection system, comprise electric power pylon intensity and vibration off-line intelligent inspection tour instrument, described electric power pylon intensity and vibration off-line intelligent inspection tour instrument comprise portable strain transducer, accelerometer, double-channel signal regulating instrument and binary channels dynamic signal acquisition processor, described portable strain transducer links to each other with the double-channel signal regulating instrument respectively with accelerometer, the double-channel signal regulating instrument links to each other with binary channels dynamic signal acquisition processor, and binary channels dynamic signal acquisition processor links to each other with data processing equipment.

Described portable strain transducer is fixed to the electric transmission pole tower measured position with magnet base, portable strain transducer comprises the bridge circuit that is comprised of the standard foil gauge, described bridge circuit is solidificated in the resilient ring, the resilient ring two ends connect respectively magnet base, the bridge circuit that is comprised of the standard foil gauge links to each other with strain amplifier by wire, and strain amplifier links to each other with data processing equipment by wire.

Described double-channel signal regulating instrument and binary channels dynamic signal acquisition processor are integrated by lithium battery power supply.

Two signals that described portable strain transducer and accelerometer gather pass through respectively vibration signal passage and strain signal channel transfer to the double-channel signal regulating instrument.

Described data processing equipment is notebook computer.

Utilize electric power pylon intensity and vibration off-line intelligent inspection system to electric power pylon strength vibration reliability method for early warning: by 8 vibration values a that some towers are patrolled and examined at every turn _iWith strain value ε _iMeasurement data separately statistical average obtains 1 vibration values a _jWith 1 strain value ε _jAs the sample of 1 record,

$a_j=\left(\underset{1}{\overset{8}{\mathrm{\Σ}}}{a}_i\right)/8$ ${\mathrm{\ϵ}}_j=\left(\underset{1}{\overset{8}{\mathrm{\Σ}}}{\mathrm{\ϵ}}_i\right)/8$

N sample of regular check point carried out statistical computation, and n is the integer more than or equal to 1, obtains their vibration expectation value a _μWith the poor a of vibration standard _σAnd strain expectation value ε _μWith strain standard deviation ε _σ,

$a_{\mathrm{\μ}}=\left(\underset{1}{\overset{n}{\mathrm{\Σ}}}{a}_j\right)/n$ $a_{\mathrm{\σ}}=\left(\sqrt{\underset{1}{\overset{n}{\mathrm{\Σ}}}{(a_j-a_{\mathrm{\μ}})}^2}\right)/n$

${\mathrm{\ϵ}}_{\mathrm{\μ}}=\left(\underset{1}{\overset{n}{\mathrm{\Σ}}}{\mathrm{\ϵ}}_j\right)/n$ ${\mathrm{\ϵ}}_{\mathrm{\σ}}=\left(\sqrt{\underset{1}{\overset{n}{\mathrm{\Σ}}}{({\mathrm{\ϵ}}_j-{\mathrm{\ϵ}}_{\mathrm{\μ}})}^2}\right)/n$

When namely patrolling and examining number of times, sample number n surpasses the expectation value a that obtains after 20 _μWith standard deviation a _σWith strain expectation value ε _μWith strain standard deviation ε _σAs the foundation of early warning value,

Vibration early warning value=a _μ+ 3a _σ

Strain early warning value=ε _μ+ 3 ε _σ

To patrol and examine measured value a at every turn _iAnd ε _iWeighting is processed.

Accelerometer in the utility model, double-channel signal regulating instrument and binary channels dynamic signal acquisition processor are prior art, do not repeat them here.

Vibration of the present utility model and strain transducer are by lithium battery power supply.The utility model possesses two signalling channels, and 1 passage is vibration signal, and 2 passages are strain signal.Be connected with notebook by USB interface.Vibration transducer adopts accelerometer.Strainometer is fixedly mounted on the steel tower key position in advance.The maintainer regularly to tested tower appointed part measure and with the data autostore in Computer Database, analyze appointed part vibration and STRESS VARIATION trend to diagnose the structural health conditions of this tower.

The beneficial effects of the utility model:

1 changes domestic existing line patrols and examines the method that can rely on range estimation, makes the reliability of steel tower that corresponding database and appraisal procedure be arranged.

2 electric power pylon strength vibration intelligent inspection tour instruments adopt lithium battery power supply, and volume is little, lightweight, and is easy to carry.

3 patrol and examine measurement point at every turn determines that data have comparability.

4 these systems can off-line monitoring, allow to measure at arbitrarily vibration and strength sensitive point, and the accuracy height, safe and reliable.

Description of drawings

Fig. 1 is logging and installation of sensors synoptic diagram;

Fig. 2 is the logging circuit theory diagrams;

Fig. 3 is tested column foot measuring point location name method;

Wherein, 1. electric transmission pole tower principal post, 2. portable strain transducer, 3. low frequency high-sensitivity accelerometer, 4. the xsect of tested tower is defined as respectively east _ north, east _ south, south _ east, south _ west, west _ south, west _ north, north _ west, north _ east such as 8 measurement faces among Fig. 3.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing and embodiment.

As shown in Figure 1, electric power pylon intensity and vibration off-line intelligent inspection system, comprise electric power pylon intensity and vibration off-line intelligent inspection tour instrument, described electric power pylon intensity and vibration off-line intelligent inspection tour instrument comprise portable strain transducer 2, low frequency high-sensitivity accelerometer 3, double-channel signal regulating instrument and binary channels dynamic signal acquisition processor, described portable strain transducer 2 links to each other with the double-channel signal regulating instrument respectively with low frequency high-sensitivity accelerometer 3, the double-channel signal regulating instrument links to each other with binary channels dynamic signal acquisition processor, and binary channels dynamic signal acquisition processor links to each other with data processing equipment.Portable strain transducer is fixed to the electric transmission pole tower measured position at any time with magnet base.Strain transducer forms full-bridge circuit by pasting 4 foil gauges on 1 flexible member, and the encapsulation rear casing is installed 2 magnetic supports.

Portable strain transducer is fixed to the electric transmission pole tower measured position with magnet base, portable strain transducer comprises the bridge circuit that is comprised of the standard foil gauge, described bridge circuit is solidificated in the resilient ring, the resilient ring two ends connect respectively magnet base, the bridge circuit that is comprised of the standard foil gauge links to each other with strain amplifier by wire, and strain amplifier links to each other with data processing equipment by wire.

Shown in Fig. 1,3; get xsect 4 height of tested tower as detection faces; near 4 electric transmission pole tower principal posts 1 xsect are as the monitoring point; each monitoring point is surveyed 2 orthogonal, be defined as respectively east _ north, east _ south, south _ east, south _ west, west _ south, west _ north, north _ west, north _ 8 measurement faces of east total.The strain of measuring any position of electric transmission pole tower only need to be adsorbed onto strainometer among Fig. 1 on the body of the tower girder steel by magnet base, and each face is measuring vibrations and two parameters of strain simultaneously.

As shown in Figure 2, portable strain transducer receives signal and is treated to low-pass filtering by strain amplifier, amplifies laggard stroke control through direct current and amplifies.The accelerometer measures signal amplifies by the laggard stroke control of a series of filter and amplifications, carries out after analog to digital conversion and signal process together with portable strain transducer signal, changes into to import notebook computer behind the corresponding data and carry out data and process.

The early warning of electric power pylon strength vibration reliability determines that method is as follows: by 8 vibration values a that some towers are patrolled and examined at every turn _iWith strain value ε _iMeasurement data separately statistical average obtains 1 vibration values a _jWith 1 strain value ε _jSample as 1 record.

$a_j=\left(\underset{1}{\overset{8}{\mathrm{\Σ}}}{a}_i\right)/8$ ${\mathrm{\ϵ}}_j=\left(\underset{1}{\overset{8}{\mathrm{\Σ}}}{\mathrm{\ϵ}}_i\right)/8$

N sample of regular check point carried out statistical computation, obtain their expectation value a _μWith standard deviation a _σWith strain expectation value ε _μWith strain standard deviation ε _σ

$a_{\mathrm{\μ}}=\left(\underset{1}{\overset{n}{\mathrm{\Σ}}}{a}_j\right)/n$ $a_{\mathrm{\σ}}=\left(\sqrt{\underset{1}{\overset{n}{\mathrm{\Σ}}}{(a_j-a_{\mathrm{\μ}})}^2}\right)/n$

${\mathrm{\ϵ}}_{\mathrm{\μ}}=\left(\underset{1}{\overset{n}{\mathrm{\Σ}}}{\mathrm{\ϵ}}_j\right)/n$ ${\mathrm{\ϵ}}_{\mathrm{\σ}}=\left(\sqrt{\underset{1}{\overset{n}{\mathrm{\Σ}}}{({\mathrm{\ϵ}}_j-{\mathrm{\ϵ}}_{\mathrm{\μ}})}^2}\right)/n$

Surpass the expectation value a that obtains after 20 as sample number n (namely patrolling and examining number of times) _μWith standard deviation a _σWith strain expectation value ε _μWith strain standard deviation ε _σCan be used as the foundation of early warning value.

Vibration early warning value=a _μ+ 3a _σ

Strain early warning value=ε _μ+ 3 ε _σ

To patrol and examine measured value a at every turn _iAnd ε _iWeighting is processed.

Claims (5)

1. A power transmission tower strength and vibration off-line intelligent inspection system is characterized in that it comprises a power transmission tower strength and a vibration off-line intelligent inspection instrument, and the transmission tower strength and vibration off-line intelligent inspection instrument includes a mobile strain sensor, an acceleration Meter, dual-channel signal conditioning instrument and dual-channel dynamic signal acquisition processor, the mobile strain sensor and accelerometer are respectively connected to the dual-channel signal conditioning instrument, and the dual-channel signal conditioning instrument is connected to the dual-channel dynamic signal acquisition processor. The channel dynamic signal acquisition processor is connected with the data processing device. 2. as claimed in claim 1, the transmission tower strength and vibration off-line intelligent inspection system, the mobile strain sensor is fixed to the measured position of the transmission tower with a magnetic base, and the mobile strain sensor includes a bridge circuit composed of standard strain gauges , the bridge circuit is solidified in the elastic ring, the two ends of the elastic ring are respectively connected to the magnetic base, the bridge circuit composed of standard strain gauges is connected to the strain amplifier through wires, and the strain amplifier is connected to the data processing device through wires. 3. The offline intelligent inspection system for the strength and vibration of transmission towers according to claim 1, wherein the dual-channel signal conditioner and the dual-channel dynamic signal acquisition processor are integrated and powered by a lithium battery. 4. as claimed in claim 1, the transmission tower strength and vibration off-line intelligent inspection system is characterized in that, the two signals collected by the mobile strain sensor and the accelerometer are transmitted to the dual channel through the vibration signal channel and the strain signal channel respectively Signal conditioner. 5. The off-line intelligent inspection system for strength and vibration of transmission towers according to claim 1, wherein the data processing device is a notebook computer.

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