CN102583125A - Electronic tension alarm device - Google Patents
Electronic tension alarm device Download PDFInfo
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- CN102583125A CN102583125A CN2011104601348A CN201110460134A CN102583125A CN 102583125 A CN102583125 A CN 102583125A CN 2011104601348 A CN2011104601348 A CN 2011104601348A CN 201110460134 A CN201110460134 A CN 201110460134A CN 102583125 A CN102583125 A CN 102583125A
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Abstract
Aiming at solving and overcoming the technical problems and defects of the existing mechanical tension alarm device, the invention provides an electronic tension alarm device which is simple in structure, convenient in production, assembly and debugging, higher in control precision and more stable in performance. In order to fulfill the purposes, the invention adopts the following technical scheme that: an electronic tension alarm device comprises a sensor used for obtaining an electric signal according to tension at the tail end of a construction machinery cable; an amplifying circuit used for amplifying and sending the electric signal to a control unit; the control unit used for outputting a corresponding control signal when the output voltage of the amplifying circuit is increased or decreased to an appointed range, and determining the appointed range by setting a threshold value; and an executing unit used for acting according to the control signal output by the control unit so as to control a circuit in the construction machinery.
Description
Technical field
The present invention relates to building field, specifically, relate to the electronic type tensile force alarm device that a kind of cable that prevents vehicle for construction is broken.
Background technology
Building hoist; The cable of vehicle for constructions such as aerial work basket is broken through regular meeting; Have now and prevent that the tensile force alarm device that cable is broken from being a kind of mechanical device that is made up of spring and action component (number of patent application is 201020003228.3), this device exists following technical matters and weak point:
1, this apparatus structure is complicated, and many parts need die production, and production and assembly cost are higher.
2, this device utilizes helicitic texture adjustment spring force setting section parameter, and the setting value error is big thereby control accuracy is very low, and debug process is very complicated.
3, load bearing spring was in compressive state all the time after this device debugging was accomplished; Long-term use faces because mechanical fatigue causes spring force to continue the problem that descends; Mechanical breakdowns such as and the process more complicated of this device generation mechanical action, each action component have many places can produce friction, and lubricated easy inadequately appearance running is not in place or stuck; So this device needs regularly debugging and maintenance again, uses inconvenience.
4, this device is installed after; Because of tangling, cable is compelled moment of stopping at vehicle for construction; The workplatform of stop motion suddenly is meeting severe vibration (especially the workplatform movement range of driven hanging basket is very big) under the effect of self gravitation and other various power; Cause the suffered pulling force of cable end can produce the moment that reduces suddenly; Then cause this device momentary reset,, cause danger so vehicle for construction starts easily once more because the operating personal finger can't unclamp the upload control button immediately in the moment of stopping.In this device the elastic force of resistance spring can't accurately set and setting range very little; It can solve because vehicle for construction stops back workplatform and slightly rock self the frequent ann reset problem that causes, and can't thoroughly solve vehicle for construction the moment of stopping because the suffered pulling force of cable end reduces the startup problem once more that causes suddenly.
Summary of the invention
To technical matters and the deficiency that existing machinery formula tensile force alarm device exists, the invention provides a kind of simple in structurely, be convenient to production and assembly and debugging, control accuracy is higher, the electronic type tensile force alarm device that performance is more stable.The electronic type tensile force alarm device can solve vehicle for construction because parking moment of installing that the mechanical type tensile force alarm device causes starts problem once more.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts comprises:
A kind of electronic type tensile force alarm device is characterized in that having:
Sensor: it obtains electric signal according to vehicle for construction cable end pulling force;
Amplifying circuit: it gives control unit after said electric signal is amplified;
Control unit: it exports corresponding control signal when output voltage of said amplifying circuit raises or is reduced to stated limit, it comes clear and definite said stated limit through set threshold voltage;
Performance element: its control signal according to said control unit output moves, and the circuit in the vehicle for construction is controlled.
Said input amplifier is provided with zeroing circuit.
Said control unit comprises comparator circuit and aerotron, and said amplification circuit output end connects said comparator circuit input end, and said comparator circuit mouth connects said transistor base.
Said comparator circuit is provided with the VREF (Voltage Reference) regulating circuit.
Said VREF (Voltage Reference) regulating circuit is provided with the VREF (Voltage Reference) regulator potentiometer, and the handle of said VREF (Voltage Reference) regulator potentiometer is provided with mark, and the angle of said mark rotation shows through the limbus table.
Said comparator circuit is the comparator circuit of whirling that stagnates.
The said stagnant comparator circuit of whirling is provided with the threshold voltage adjustments resistor.
Said performance element comprises relay and warning circuit, and said transistor emitter connects the driving circuit of said relay, and the one group of open contact or the said transistor emitter of said relay connect said warning circuit.
With the driven hanging basket is setting means and the working process that example is analyzed circuit among the present invention, hereinafter to be referred as hanging basket.
If hanging basket cable all-mass is M, the cable minimum breaking force is Fp, and the peak acceleration that hanging basket is up when starting is a.
Setting means
The first step is as the suffered pulling force of sensor (being the cable end pulling force) F
L=0 o'clock, the zeroing circuit of debugging amplifying circuit, making its input end difference of potential is zero.
If the suffered tensile force f of sensor
LDuring=Mg (g is an acceleration due to gravity), the output voltage of amplifying circuit is U
01, establish the suffered tensile force f of sensor
LDuring=Mg+Ma, the output voltage of amplifying circuit is U
02, establish the suffered tensile force f of sensor
L=F
PThe time, the output voltage of amplifying circuit is U
03
Second goes on foot, and adjusts the threshold voltage adjustments resistor of the stagnant comparator circuit of whirling, and sets its two threshold voltage U
T1And U
T2(establish U
T2＞U
T1) difference DELTA U
T
The 3rd step, the VREF (Voltage Reference) regulator potentiometer of the stagnant comparator circuit of whirling of adjustment, then Δ U
TCan not change U
T1And U
T2Set simultaneously.
Work as U
01＜U
T1, U
02＜U
T2＜U
03The time, the electronic type tensile force alarm device just can use.
Working process
When hanging basket starts or at the uniform velocity rises, the suffered tensile force f of sensor
L≤Mg+Ma, the output voltage U of amplifying circuit
0＜U
T2, this moment, comparator circuit was output as high level, and aerotron can not conducting, and relay is failure to actuate, and hanging basket normally moves.
After the hanging basket cable is tangled by the below obstacle, the suffered tensile force f of sensor
LTo increase the output voltage U of amplifying circuit rapidly
0Increase rapidly thereupon, work as U
0＞U
T2The time, comparator circuit is output as low level, the rapid conducting of aerotron, and the then actuating of relay, the disconnection of hanging basket upstream circuitry stops up, and warning circuit starts.
Hanging basket stops moment, since the elastic force of hanging basket steel rope and the action of gravity of workplatform self, the suffered tensile force f of sensor
LCan produce the moment that reduces suddenly, amplifying circuit output voltage U
0Can reduce suddenly, establishing its maximum variable quantity is Δ U thereupon
0, because present embodiment has adopted the comparator circuit of whirling that stagnates, as long as Δ U is satisfied in the debugging of its threshold voltage adjustments resistor
T＞Δ U
0, the comparator circuit of whirling of then stagnating can be operated in the interval of whirling that stagnates always, output low level still, and aerotron is in conducting state always, the hanging basket phenomenon that moment starts once more that just can not occur stopping.
After the removal of obstacle of cable below, cable end only bears the self gravitation effect, at this moment U
0≤U
01＜U
T1, then comparator circuit output becomes high level, and aerotron is in off condition, and relay resets, and hanging basket recovers normal operation.
Setting sensor and amplifying circuit are operated between linear zone; The VREF (Voltage Reference) regulator potentiometer is a linear regulation; Then the suffered pulling force of sensor (the warning value of thrust of electronic type tensile force alarm device) is linear when the angle of on the limbus table, rotating of the sign on its handle and the actuating of relay; Can be through calculating the warning value of thrust of the cooresponding electronic type tensile force alarm device of each scale, more convenient user sets intuitively.
For the vehicle for construction of same brand, the maximum variation delta U of the output voltage of its moment amplifying circuit that stops
0Be a constant,, or directly replace with fixed resister so the threshold voltage adjustments resistor can be made as the permanent resistor value.
Compared with prior art, advantage of the present invention and good effect are:
1, the structure of electronic type tensile force alarm device is very simple, is beneficial to production and assembly, and the production of main portion circuit card does not need mould, and cost of production is very low, is more conducive to cost-cutting, promotes the use of.
2, the sensor of electronic type tensile force alarm device can be exported point-device electric signal, and the control unit control accuracy is very high, debugs also very simplely, and this has just determined that the field of application of electronic type tensile force alarm device is inevitable more wide.
3, the electronic type tensile force alarm device is inner does not have a machinery action (movement range of sensor very I to ignore); Can not produce mechanical breakdown; So need not regularly debugging and maintenance; It is more much longer than spring to add the upper sensor operating cycles, changes also to be easy to, so the use of electronic type tensile force alarm device is convenient.
4, in the electronic type tensile force alarm device, control unit can be debugged alarm parameters free adjustment and setting in limited range very easy.It can not produce frequent ann reset problem after vehicle for construction stops, can thoroughly solve the problem that vehicle for construction starts in the moment of stopping easily once more yet.
Description of drawings
Fig. 1 is schematic circuit diagram of the present invention;
Symbol and explanation among the figure:
Shown in Fig. 1:
1, sensor;
2, amplifying circuit; 2-1, zero potentiometer;
3, control unit; 3-1, comparator circuit; The 3-2 aerotron; 3-3, threshold voltage adjustments resistor; 3-4, VREF (Voltage Reference) regulator potentiometer;
4, performance element; 4-1, relay; 4-2, warning circuit.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further detailed explanation.
As shown in Figure 1, a kind of electronic type tensile force alarm device, its characteristic has:
Sensor 1 obtains electric signal according to vehicle for construction cable end pulling force; Amplifying circuit 2 is given control unit 3 after said electric signal is amplified; Control unit 3 is exported corresponding control signal when the output voltage of amplifying circuit 2 raises or is reduced to stated limit; Control unit 3 comes clear and definite said stated limit through set threshold voltage, and performance element 4 moves according to the control signal of control unit 3 outputs, and the circuit in the vehicle for construction is controlled.
Amplifying circuit 2 input ends are provided with zero potentiometer 2-1, and debugging zero potentiometer 2-1 can make amplifying circuit 2 input end difference of potential vanishing.
Comparator circuit 3-1 is the stagnant comparator circuit of whirling that is provided with positive feed back.
The threshold voltage adjustments resistor 3-3 of the stagnant comparator circuit 3-1 that whirls of debugging; Then the difference of two threshold voltages of the stagnant comparator circuit 3-1 that whirls can change; Debugging VREF (Voltage Reference) regulator potentiometer 3-4, then two threshold voltages of the stagnant comparator circuit 3-1 that whirls can change according to same magnitude.
Performance element 4 comprises relay 4-1 and warning circuit 4-2.
The above only is preferred embodiment of the present invention, is not to be the restriction of the present invention being made other form, and any professional and technical personnel of being familiar with possibly utilize the technology contents of above-mentioned announcement to change or be modified as the equivalent embodiment of equivalent variations.But everyly do not break away from technical scheme content of the present invention, to any simple modification, equivalent variations and remodeling that above embodiment did, still belong to the protection domain of technical scheme of the present invention according to technical spirit of the present invention.
Claims (8)
1. electronic type tensile force alarm device is characterized in that having:
Sensor: it obtains electric signal according to vehicle for construction cable end pulling force;
Amplifying circuit: it gives control unit after said electric signal is amplified;
Control unit: it exports corresponding control signal when output voltage of said amplifying circuit raises or is reduced to stated limit, it comes clear and definite said stated limit through set threshold voltage;
Performance element: its control signal according to said control unit output moves, and the circuit in the vehicle for construction is controlled.
2. according to the said input amplifier of claim 1 zeroing circuit is set.
3. comprise comparator circuit and aerotron according to the said control unit of claim 1, said amplification circuit output end connects said comparator circuit input end, and said comparator circuit mouth connects said transistor base.
4. according to the said comparator circuit of claim 3 the VREF (Voltage Reference) regulating circuit is set.
5. according to the said VREF (Voltage Reference) regulating circuit of claim 4 the VREF (Voltage Reference) regulator potentiometer is set, the handle of said VREF (Voltage Reference) regulator potentiometer is provided with mark, and the angle of said mark rotation shows through the limbus table.
6. be the comparator circuit of whirling that stagnates according to claim 3 or 4 said comparator circuits.
7. according to the said stagnant comparator circuit of whirling of claim 6 the threshold voltage adjustments resistor is set.
8. comprise relay and warning circuit according to the said performance element of claim 1, said transistor emitter connects the driving circuit of said relay, and the one group of open contact or the said transistor emitter of said relay connect said warning circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104601348A CN102583125A (en) | 2011-12-26 | 2011-12-26 | Electronic tension alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104601348A CN102583125A (en) | 2011-12-26 | 2011-12-26 | Electronic tension alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102583125A true CN102583125A (en) | 2012-07-18 |
Family
ID=46472500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104601348A Pending CN102583125A (en) | 2011-12-26 | 2011-12-26 | Electronic tension alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102583125A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103420240A (en) * | 2013-07-26 | 2013-12-04 | 许宾 | Intelligent type tensile force warning device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2047813U (en) * | 1988-12-31 | 1989-11-15 | 云南大学 | Anti-shock alarm of poisonous and combustible gas |
| JPH03230710A (en) * | 1990-01-31 | 1991-10-14 | Fujita Corp | Alarm device for work adjacent to high tension cable |
| CN2592616Y (en) * | 2002-12-31 | 2003-12-17 | 三一重工股份有限公司 | Towercrane operation monitoring apparatus |
| CN201280926Y (en) * | 2008-08-29 | 2009-07-29 | 濮阳市东昊机械电子有限公司 | Overrunning protection arrangement for combining vehicle |
| CN101566512A (en) * | 2009-06-05 | 2009-10-28 | 中煤第五建设公司第二工程处 | Device for online and real-time detection of tensile force of template suspension rope in building well wall |
| CN201580875U (en) * | 2009-06-17 | 2010-09-15 | 付允杰 | Security monitoring device of hoisting equipment |
| CN201694705U (en) * | 2010-06-30 | 2011-01-05 | 中国建筑科学研究院建筑机械化研究分院 | Overload protecting and weighing protector of construction lifter |
-
2011
- 2011-12-26 CN CN2011104601348A patent/CN102583125A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2047813U (en) * | 1988-12-31 | 1989-11-15 | 云南大学 | Anti-shock alarm of poisonous and combustible gas |
| JPH03230710A (en) * | 1990-01-31 | 1991-10-14 | Fujita Corp | Alarm device for work adjacent to high tension cable |
| CN2592616Y (en) * | 2002-12-31 | 2003-12-17 | 三一重工股份有限公司 | Towercrane operation monitoring apparatus |
| CN201280926Y (en) * | 2008-08-29 | 2009-07-29 | 濮阳市东昊机械电子有限公司 | Overrunning protection arrangement for combining vehicle |
| CN101566512A (en) * | 2009-06-05 | 2009-10-28 | 中煤第五建设公司第二工程处 | Device for online and real-time detection of tensile force of template suspension rope in building well wall |
| CN201580875U (en) * | 2009-06-17 | 2010-09-15 | 付允杰 | Security monitoring device of hoisting equipment |
| CN201694705U (en) * | 2010-06-30 | 2011-01-05 | 中国建筑科学研究院建筑机械化研究分院 | Overload protecting and weighing protector of construction lifter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103420240A (en) * | 2013-07-26 | 2013-12-04 | 许宾 | Intelligent type tensile force warning device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| DD01 | Delivery of document by public notice |
Addressee: Xu Bin Document name: Notification of Patent Invention Entering into Substantive Examination Stage |
|
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 266071 Shandong Province, Qingdao city Shandong Road No. 29 building 2401 room 24 Galaxy Building rain Yan building materials limited company Applicant after: Xu Bin Address before: 266001 Shandong province Qingdao City Taiping Road, No. 29 Oceanwide Elite Hotel Engineering Department Applicant before: Xu Bin |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120718 |