CN101871765A - Linear flexible sensor for electricity-close early-warning of tower crane and yard-crane and device locking - Google Patents
Linear flexible sensor for electricity-close early-warning of tower crane and yard-crane and device locking Download PDFInfo
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- CN101871765A CN101871765A CN201010186907A CN201010186907A CN101871765A CN 101871765 A CN101871765 A CN 101871765A CN 201010186907 A CN201010186907 A CN 201010186907A CN 201010186907 A CN201010186907 A CN 201010186907A CN 101871765 A CN101871765 A CN 101871765A
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Abstract
The invention discloses a linear flexible sensor for electricity-close early-warning of a tower crane and a yard-crane and device locking, comprising an axial cord made of a plurality of annealed copper wires. An inner insulating layer is arranged outside the axle center; an inductor with a spiral copper cord layer structure is closely wound outside the inner insulating layer; and an insulating sleeve is covered outside the inductor. The sensor has reasonable structure, is arranged outside the whole cantilever crane, wherein the distance from a random position of the cantilever crane to a charged body is less than or equal to a set distance, so the sensor can accurately induce and output electric quantities reflecting different voltage levels, and realizes electricity-close early-warning, locking and other functions by using a back stage.
Description
Technical field:
The present invention relates to a kind of sensor.
Background technology:
When tower crane, jenny close on the alive circuit operation, hang personnel to elevator boom rack, suspender etc. are unclear with the minimum safe distance understanding of electrified body, assurance is improper because of many departments, often cause electrified body that tower crane, jenny elevator boom rack are discharged and line tripping and damage accident take place.These accidents serious threats on the one hand operating personnel's life security, and also the safe and reliable operation of electrical network in serious threat on the other hand, very easily causes large area blackout, directly and indirect economic loss huge.
In order to reduce the work risk of this respect; there are many units to attempt at installing unit, elevator boom rack top orientation sensor; this sensor technology comparative maturity; the induced electricity tolerance of its collection can reflect more sensitively its with different electric pressure electrified bodys between distance relation; thereby be nearly electric early warning; the locking background apparatus provides reliable signal source; but shortcoming is only to respond to certain point and certain direction; can not protect whole elevator boom rack; even install a plurality of sensors; can not accomplish all standing; therefore, the sensor that must have a kind of energy of development to cover whole elevator boom rack is arranged.
Summary of the invention:
The object of the present invention is to provide a kind of rational in infrastructurely, can cover the nearly electric early warning of tower crane, jenny, the blocking device linear flexible sensor of whole elevator boom rack.
Technical solution of the present invention is:
A kind of tower crane, the nearly electric early warning of jenny, blocking device linear flexible sensor, it is characterized in that: comprise the thread axis of multiply soft copper, inner insulating layer is set, the outer close inductance of inner insulating layer, inductance outer wrapping insulating sheath outside the axle center around the copper flexible cord layer of spiral fashion structure.
The present invention is rational in infrastructure, sensor is installed in whole jib outside, distance is smaller or equal to the distance of setting between any one position of jib and electrified body, and it all can accurately respond to and export the electric parameters of the different electric pressures of reflection, utilizes the backstage to realize functions such as nearly electric early warning, locking.The sensor axle center is made by the multiply annealed copper wire, as circulation channel and play the effect that increases pulling strengrth; The outside in axle center forms inductance with the close coiled of copper flexible cord.When near electrified body, because effect of electric field forms circulation between inductance and the axle center, convert voltage signal to through sample resistance, can judge the size of electric field by voltage swing, thereby calculate distance apart from electrified body.Outermost layer uses the rubber-covered sheath to seal in the sensor, play anti-aging, resistance to wear, reinforced insulation intensity, increase the effect of pulling strengrth.
Linear transducer is followed certain theoretical foundation, simultaneously also through test of many times checking, record data such as table 1.
Theoretical foundation: locate to place the n circle inductive coil of closed loop apart from electrified body r (unit: rice), according to drawing the law of electromagnetic induction, the coil-induced electromotive force that goes out is:
ε＝nΔΦ/Δt
In the loop of closure, the electromotive force of alternation produces electric current I.
Mark: ε: induction electromotive force (V);
N: number of inductive coil turns; ΔΦ/Δ t: the rate of change of magnetic flux, wherein: Φ=BSsinA
Φ: magnetic flux, measurement unit are weber (Wb);
B: the magnetic induction density of uniform magnetic field, measurement unit tesla (T), according to Biot--Sa cuts down your law method, from electrified body r (unit: the magnetic field intensity in place rice)
With square being inversely proportional to of distance r;
SsinA: over against area (m
2); T: time.
Therefore, induction current I and distance, the number of turn, sectional area, voltage are relevant, and linear sensor section is long-pending identical, and is under identical electric pressure, same distance, only relevant with the number of turn under the magnetic field.
Test figure: linear sensor: 10 meters; Sample resistance: 100k Ω.
Measurement data such as table 1, induction current only have very little variation in the end of sensor during near high pressure, show that according to following test figure at the induction current of end smaller (about 10%), linear sensor is applicable to the nearly electro-detection of Operation Van fully.Table 1
Description of drawings:
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the configuration diagram of one embodiment of the invention.
Fig. 2 is the nearly electric early warning of tower crane, jenny, the blocking device configuration diagram that adopts sensor of the present invention.
Embodiment:
A kind of tower crane, the nearly electric early warning of jenny, blocking device linear flexible sensor, comprise the thread axis 1 of multiply soft copper, inner insulating layer 2 is set, the outer close inductance 3 of inner insulating layer, inductance outer wrapping insulating sheath 4 outside the axle center around the copper flexible cord layer of spiral fashion structure.
Adopt the nearly electric early warning of tower crane, jenny of sensor of the present invention, the principle of work of blocking device: the voltage signal that sensor 5 is gathered converts suitable voltage signal to through the operational amplifier 6 of a high impedance, through frequency selection circuit 7, filter out power frequency signal in addition, through A/D conversion 8, convert digital signal to again.The signal of 9 pairs of collections of 32 embedded-type ARM systems carries out digital filtering and Fu Shi changes, and calculates the size of amplitude, calculates nearly electric situation by crest meter.When near electricity took place, device can carry out sound and light alarm.Device has self-checking function, when sensor contacts when bad, can report to the police.
Claims (1)
1. a tower crane, the nearly electric early warning of jenny, blocking device linear flexible sensor, it is characterized in that: comprise the thread axis of multiply soft copper, inner insulating layer is set, the outer close inductance of inner insulating layer, inductance outer wrapping insulating sheath outside the axle center around the copper flexible cord layer of spiral fashion structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010186907A CN101871765A (en) | 2010-05-31 | 2010-05-31 | Linear flexible sensor for electricity-close early-warning of tower crane and yard-crane and device locking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010186907A CN101871765A (en) | 2010-05-31 | 2010-05-31 | Linear flexible sensor for electricity-close early-warning of tower crane and yard-crane and device locking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101871765A true CN101871765A (en) | 2010-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010186907A Pending CN101871765A (en) | 2010-05-31 | 2010-05-31 | Linear flexible sensor for electricity-close early-warning of tower crane and yard-crane and device locking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101871765A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776867A (en) * | 2015-03-27 | 2015-07-15 | 联想(北京)有限公司 | Method for determining relative position relationship of first object and second object and electronic equipment |
| CN105301596A (en) * | 2015-11-13 | 2016-02-03 | 国网湖北省电力公司检修公司 | Distance measuring and alarming method for potential approaching work of crane lifting car |
| CN107651587A (en) * | 2017-10-27 | 2018-02-02 | 哈尔滨理工大学 | A kind of device and its control method for reducing tower crane sensing high voltage harm |
| CN109392305A (en) * | 2017-06-05 | 2019-02-26 | 韩国电力公社 | The method for predicting the size of head tower ground |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86107872A (en) * | 1986-11-15 | 1988-09-07 | 中国科学院武汉岩土力学研究所 | Inductive strain gauge |
| CN87216550U (en) * | 1987-12-16 | 1988-10-26 | 中国科学院武汉岩土力学研究所 | High carrier-friquency differential induction displacement sensor |
| CN101476917A (en) * | 2009-01-20 | 2009-07-08 | 江苏工业学院 | Sensor for simultaneously detecting liquid level and electro-conductibility |
| CN201277991Y (en) * | 2008-08-26 | 2009-07-22 | 江苏省电力公司无锡供电公司 | Chain high voltage sensing device |
| CN201293632Y (en) * | 2008-11-11 | 2009-08-19 | 江苏省电力公司无锡供电公司 | Alarm for adjacence of construction machinery to high-voltage transmission line |
-
2010
- 2010-05-31 CN CN201010186907A patent/CN101871765A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86107872A (en) * | 1986-11-15 | 1988-09-07 | 中国科学院武汉岩土力学研究所 | Inductive strain gauge |
| CN87216550U (en) * | 1987-12-16 | 1988-10-26 | 中国科学院武汉岩土力学研究所 | High carrier-friquency differential induction displacement sensor |
| CN201277991Y (en) * | 2008-08-26 | 2009-07-22 | 江苏省电力公司无锡供电公司 | Chain high voltage sensing device |
| CN201293632Y (en) * | 2008-11-11 | 2009-08-19 | 江苏省电力公司无锡供电公司 | Alarm for adjacence of construction machinery to high-voltage transmission line |
| CN101476917A (en) * | 2009-01-20 | 2009-07-08 | 江苏工业学院 | Sensor for simultaneously detecting liquid level and electro-conductibility |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776867A (en) * | 2015-03-27 | 2015-07-15 | 联想(北京)有限公司 | Method for determining relative position relationship of first object and second object and electronic equipment |
| CN104776867B (en) * | 2015-03-27 | 2017-09-29 | 联想(北京)有限公司 | The determination method and electronic equipment of first object and the second object relative position relation |
| CN105301596A (en) * | 2015-11-13 | 2016-02-03 | 国网湖北省电力公司检修公司 | Distance measuring and alarming method for potential approaching work of crane lifting car |
| CN109392305A (en) * | 2017-06-05 | 2019-02-26 | 韩国电力公社 | The method for predicting the size of head tower ground |
| CN109392305B (en) * | 2017-06-05 | 2020-10-30 | 韩国电力公社 | Method for predicting size of steel tower foundation |
| CN107651587A (en) * | 2017-10-27 | 2018-02-02 | 哈尔滨理工大学 | A kind of device and its control method for reducing tower crane sensing high voltage harm |
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Application publication date: 20101027 |