CN202022663U - Torque limiting device with automatic sensor cable breakage detection function - Google Patents
Torque limiting device with automatic sensor cable breakage detection function Download PDFInfo
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- CN202022663U CN202022663U CN2011201389998U CN201120138999U CN202022663U CN 202022663 U CN202022663 U CN 202022663U CN 2011201389998 U CN2011201389998 U CN 2011201389998U CN 201120138999 U CN201120138999 U CN 201120138999U CN 202022663 U CN202022663 U CN 202022663U
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- moment
- limiter
- weight sensor
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Abstract
A torque limiting device with an automatic sensor cable breakage detection function comprises a torque limiting device; a weight sensor of the torque limiting device is connected with two operational amplifier modules which are connected with an A/D (analog to digital) converter; the A/D converter is connected with a central processing unit module which is connected with a display module and an alarm module; and a common-mode voltage output signal of the weight sensor is connected with the operational amplifier modules. As for the torque limiting device with the automatic sensor line breakage detection function, the breakage of the cable of the weight sensor is judged by conducting A/D conversion on the common-voltage taking out from the output signals of the weight sensor without changing the weight sensor, the automatic sensor cable breakage detection function is increased, the sensor cable breakage fault can be fast removed and recovered at the first time, and the effects of being effort-saving and time-saving can be achieved.
Description
Technical field
The utility model relates to a kind of limiter of moment, and especially a kind of have a break limiter of moment of automatic measuring ability of sensor.
Background technology
Moment (overload) killer can be from amplitude when hoisting crane is worked, aspects such as weight are monitored in real time, gather current all kinds of mode of operation, data analysis is carried out in computing, show current real work parameter and nominal operation ability parameter by figure numerical value mode, compare with the nominal operation ability parameter that is provided with before simultaneously, judge whether the work at present state is normal fast, when each numerical value of work at present closes on rated limits, early warning and warning in time take place, and the control work at present, stop the work at present behavior, potential safety hazard and danger factor when the staff can in time understand work, in time get rid of, the generation of safety misadventure is taken precautions against and reduced to actv..
Limiter of moment several abnormal condition can occur when work: 1, hoisting crane load capacity, instrument are shown as zero; When 2, the hoisting crane load capacity changed, the instrument displayed value was constant or be zero always.Under this error state: hardware and software goes wrong and accounts for 30%, and has often occupied 60%---70% by the disconnected problem that causes of pickup wire.As professional degree high product, the fault of instrument hardware, software is to need the professional person to handle, if but just line is disconnected, and professional person's processing by the time is just more improper, and one causes delaying the duration, and two come the increase expense.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of break limiter of moment of automatic measuring ability of sensor that has, increase the disconnected function of automatic detecting sensor line at limiter of moment, in case it is because the disconnected words that cause of pickup wire unusually that work occurs, can on display instrument, show intuitively, but make things convenient for just trouble-shooting of field technician oneself, safeguard work is normally carried out.
For solving the problems of the technologies described above, the technical scheme that the utility model is taked is: a kind of have a break limiter of moment of automatic measuring ability of sensor, comprise limiter of moment, the weight sensor of limiter of moment is connected with two op amp modules, two op amp modules connect A/D converter, A/D converter connects CPU module, and CPU module connects display module, alarm module.
The common-mode voltage output signal concatenation operation amplifier module of described weight sensor.
Described limiter of moment comprises that instrument amplifier, weight sensor comprise electric bridge module and strain-gauge, and weight sensor electric bridge module mouth inserts the differential input end of instrument amplifier behind capacitor filtering.
Described instrument amplifier, weight sensor connect the independent power supply of 9V respectively.
Described instrument amplifier adopts AD623.
Described op amp module adopts TS27L2.
The utility model is a kind of to have the break limiter of moment of automatic measuring ability of sensor, do not change weight sensor, by the weight sensor output signal is got common-mode voltage, whether change the cable of judging weight sensor through A/D breaks, increased the disconnected function of automatic detecting sensor line, can very fast eliminating pickup wire disconnected fault, and the very first time recover, time saving and energy saving.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples:
Fig. 1 is that the utility model weight sensor amplifies and the burn out detection principle of work;
Fig. 2 is the utility model differential amplifier circuit figure;
Fig. 3 is the utility model electric bridge module;
Fig. 4 is the utility model weight sensor break detection circuit figure.
The specific embodiment
A kind of have a break limiter of moment of automatic measuring ability of sensor, comprise limiter of moment, the weight sensor of limiter of moment is connected with two op amp modules, two op amp modules connect A/D converter, A/D converter connects CPU module, and CPU module connects display module, alarm module.The common-mode voltage output signal concatenation operation amplifier module of described weight sensor.Described limiter of moment comprises that instrument amplifier, weight sensor comprise electric bridge module and strain-gauge, and weight sensor electric bridge module mouth inserts the differential input end of instrument amplifier behind capacitor filtering.
Embodiment:
Circuit adopts the integrated single supply instrument amplifier of AD623, it have common-mode input range, gain the highest (can reach 1000 times), low-power consumption and single supply (+3V to+provide the advantages such as output of full power supply amplitude to be widely used in the small-signal amplification under 12V).Weight sensor and AD623 all adopt the 9V single power supply in the circuit, and weight sensor adopts electrical bridge principle, and the stressed small signal of strain-gauge inserts the amplifier differential input end through capacitor C 201, C202, C203 filtering.As Fig. 2, shown in Figure 3.
In order to make instrument intelligent and reduce maintenance and mounting hardness, the sensor of gaining in weight broken string oneself detects, circuit diagram as shown in Figure 4:
Two amplifiers of wherein self-testing circuit are as voltage follow, and resistance R 406, R407, R408, R409 export dividing potential drop, and W1_Corr1 and W1_Corr2 insert AD623.The weight sensor broken string is divided into the following detailed description of several situations.
1) four wire joints are all normal: the △ U of the stressed generation of weight sensor can ignore at the millivolt order of magnitude, so VIN
+=VIN-=1/2VCC, the voltage that detects at W1_Corr1 and W1_Corr2 terminal is 1/4VCC.
2) VCC broken string: when VCC breaks, VIN
+Be shorted to ground with VIN-by resistance R 3, R4, the voltage that W1_Corr1 and W1_Corr2 terminal detect is for being 0.
3) IN+ broken string: when IN+ breaks, through obtaining VIN after capacitor C 202, the C203 dividing potential drop
+=VIN-* C202/(C202+C203), because C202=C203, the voltage that W1_Corr1 and W1_Corr2 terminal detect is respectively 1/8VCC, 1/4VCC.
4) IN-broken string: when IN-broke, principle was with (3), and the voltage that this moment, W1_Corr1 and W1_Corr2 terminal detected is respectively 1/4VCC, 1/8VCC.
5) GND broken string: when GND breaks, VIN
+Be shorted to VCC with VIN-by resistance R 1, R2, the voltage that W1_Corr1 and W1_Corr2 terminal detect is for being 1/2VCC.
When 6) weight sensor did not insert, the voltage that W1_Corr1 and W1_Corr2 terminal detect was for being 0.
Claims (6)
1. one kind has the break limiter of moment of automatic measuring ability of sensor, comprise limiter of moment, it is characterized in that: the weight sensor of limiter of moment is connected with two op amp modules, two op amp modules connect A/D converter, A/D converter connects CPU module, and CPU module connects display module, alarm module.
2. according to described a kind of the break limiter of moment of automatic measuring ability of sensor that has of claim 1, it is characterized in that: the common-mode voltage output signal concatenation operation amplifier module of weight sensor.
3. according to described a kind of the break limiter of moment of automatic measuring ability of sensor that has of claim 1, it is characterized in that: described limiter of moment comprises that instrument amplifier, weight sensor comprise electric bridge module and strain-gauge, and weight sensor electric bridge module mouth inserts the differential input end of instrument amplifier behind capacitor filtering.
4. according to described a kind of the break limiter of moment of automatic measuring ability of sensor that has of claim 3, it is characterized in that: described instrument amplifier, weight sensor connect the independent power supply of 9V respectively.
5. according to claim 3 or 4 described a kind of break limiters of moment of automatic measuring ability of sensor that have, it is characterized in that: described instrument amplifier adopts AD623.
6. according to claim 1 or 2 described a kind of break limiters of moment of automatic measuring ability of sensor that have, it is characterized in that: described op amp module adopts TS27L2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201389998U CN202022663U (en) | 2011-05-05 | 2011-05-05 | Torque limiting device with automatic sensor cable breakage detection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201389998U CN202022663U (en) | 2011-05-05 | 2011-05-05 | Torque limiting device with automatic sensor cable breakage detection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202022663U true CN202022663U (en) | 2011-11-02 |
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ID=44847623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201389998U Expired - Fee Related CN202022663U (en) | 2011-05-05 | 2011-05-05 | Torque limiting device with automatic sensor cable breakage detection function |
Country Status (1)
| Country | Link |
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| CN (1) | CN202022663U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102887448A (en) * | 2012-09-26 | 2013-01-23 | 三一重工股份有限公司 | Control system, control method and engineering machinery |
| WO2016055016A1 (en) * | 2014-10-09 | 2016-04-14 | 梅特勒-托利多(常州)精密仪器有限公司 | Weighing sensor, weighing network and monitoring method |
| CN112834958A (en) * | 2013-09-17 | 2021-05-25 | 光达家电用品公司 | Circuit integrity detection system for detecting integrity of sensing wire in electrically heated textile |
| CN113311365A (en) * | 2021-06-01 | 2021-08-27 | 深圳市思榕科技有限公司 | Pressure sensor broken string detection circuitry |
-
2011
- 2011-05-05 CN CN2011201389998U patent/CN202022663U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102887448A (en) * | 2012-09-26 | 2013-01-23 | 三一重工股份有限公司 | Control system, control method and engineering machinery |
| CN102887448B (en) * | 2012-09-26 | 2015-04-22 | 三一重工股份有限公司 | Control system, control method and engineering machinery |
| CN112834958A (en) * | 2013-09-17 | 2021-05-25 | 光达家电用品公司 | Circuit integrity detection system for detecting integrity of sensing wire in electrically heated textile |
| WO2016055016A1 (en) * | 2014-10-09 | 2016-04-14 | 梅特勒-托利多(常州)精密仪器有限公司 | Weighing sensor, weighing network and monitoring method |
| CN113311365A (en) * | 2021-06-01 | 2021-08-27 | 深圳市思榕科技有限公司 | Pressure sensor broken string detection circuitry |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111102 Termination date: 20130505 |