CN103575437A - Method for real-time monitoring of torque state of calibration platform - Google Patents
Method for real-time monitoring of torque state of calibration platform Download PDFInfo
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- CN103575437A CN103575437A CN201310545079.1A CN201310545079A CN103575437A CN 103575437 A CN103575437 A CN 103575437A CN 201310545079 A CN201310545079 A CN 201310545079A CN 103575437 A CN103575437 A CN 103575437A
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Abstract
The invention relates to a method for real-time monitoring of the torque state of a calibration platform. The method relates to a power measuring device and a torque displaying instrument located in a control cabinet of a platform testing system, wherein the power measuring device acquires torque values through a torque sensor, the torque values acquired by the torque sensor are displayed and output through the torque displaying instrument, the output end of the torque sensor is connected with a monitoring instrument through a shield cable by means of a current input connecting method, and the torque monitoring state is determined by comparing the torque values displayed and output by the monitoring instrument with the torque values displayed and output by the torque displaying instrument. According to the method, displaying through the monitoring instrument and displaying through the torque displaying instrument are conducted at the same time, comparison and judgment of any torque points can be achieved, and then real-time monitoring is achieved; the judging method is more scientific, more evidence-based, visualized, convenient and apparent to the eye, as a result, waste of time and labor cost caused by misjudgment are greatly reduced, calibration quality is guaranteed more effectively, and the credibility of a calibration result is improved.
Description
Technical field
The present invention relates to a kind of method for supervising, especially a kind of method of monitoring in real time torque condition for school bus platform position, belongs to the technical field that school bus is monitored.
Background technology
School bus platform position is that diesel engine performance detects one of most important equipment, and because its frequency of usage is high, service condition is harsh.Detecting and finding arbitrarily, all can have power measurement arrangement torque value fluctuation deviation in school bus platform position every day, this also matches with the result of actual school bus platform every day position application metering service.Because technology is limit, spot check only can be carried out to power measurement arrangement zero-bit in school bus platform position at present, and the fluctuation of this torque value can only be felt to find by operator in use, belongs to type afterwards, therefore there is quality risk.If artificial demarcation is once, not only with high costs but also time-consuming longer before wanting each school bus, cannot meet batch productive temp, cannot be applied to actual production.Therefore, need to be by carrying out moment of torsion consistance monitoring test in school bus platform position, find out a kind of objective and easily detection methods can monitor the stability that evaluates the instant operating mode in school bus platform position, thereby guarantee that every school bus quality is correct and relieved.
1), carry out school bus platform position moment of torsion zero-bit indicating value spot check at present, the conventional method that reduces school bus platform position torque value fluctuating error has:, reduce zero-drift error; 2), field test person comprehensively analyzes each calibration point moment of torsion, rotating speed, oil consumption situation by rule of thumb, carries out subjective judgement; 3), obviously higher or torque value is obvious when on the low side in oil consumption, again demarcates dynamometer, adjusts gain coefficient.
The shortcoming that above-mentioned torque value fluctuating error decision method exists is: except moment of torsion zero-bit indicating value spot check intuitive and convenient, other decision methods are without effective judgment basis, people's subjective consciousness and experience are occupied an leading position, easily occur wrong judgement and blindly carry out dynamometer demarcation, not only losing time to delay production also increases labour cost.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of method of monitoring in real time torque condition for school bus platform position is provided, it is easy to operate, can be to school bus platform position real-time working condition stability assessment, do not affect normal school bus operation, reduce school bus time and artificial calibration cost, can guarantee the correctness of test evidence, safe and reliable; Minimizing is judged and is blindly demarcated time waste and the cost of labor producing because of mistake.
According to technical scheme provided by the invention, the described method of monitoring in real time torque condition for school bus platform position, the moment of torsion Displaying Meter that comprises power measurement arrangement and be positioned at platform bit test system control cabinet; Power measurement arrangement obtains torque value by torque sensor, and the torque value that described torque sensor is obtained shows output by moment of torsion Displaying Meter; The output terminal of described torque sensor adopts electric current input connection to be connected with monitoring device by shielded cable, shows the torque value of output and the torque value comparison that moment of torsion Displaying Meter shows output, to determine the state of torque monitoring by monitoring device.
The output terminal of described torque sensor is connected with amplifier, and the output terminal of amplifier is connected with moment of torsion Displaying Meter by signal processing circuit, and the output terminal of amplifier is connected with monitoring device by shielded cable.
Described monitoring device works in anti-impulse disturbances pattern.
Described shielded cable adopts the anti-interference shielding line of 2*0.5mm.Described monitoring device adopts 220V alternating current to power separately.
Advantage of the present invention: the demonstration of monitoring device and moment of torsion Displaying Meter is carried out simultaneously, can contrast judgement to any torque point, reaches the object of real-time monitoring.Decision method is more scientific more foundation, and intuitive and convenient, very clear, greatly reduces the time waste and the human cost that because of false judgment, cause, the more effective verification quality that guaranteed, the confidence level of raising check results.
Accompanying drawing explanation
Fig. 1 is connection diagram of the present invention.
Description of reference numerals: 1-power measurement arrangement, 2-torque sensor, 3-amplifier, 4-platform bit test system control cabinet, 5-Displaying Meter, 6-signal processing circuit, 7-monitoring device and 8-shielded cable.
Embodiment
Below in conjunction with concrete drawings and Examples, the invention will be further described.
As shown in Figure 1: in order to monitor the real-time torque condition in school bus platform position, the moment of torsion Displaying Meter 5 that the present invention includes power measurement arrangement 1 and be positioned at platform bit test system control cabinet 4; Power measurement arrangement 1 obtains torque value by torque sensor 2, and the torque value that described torque sensor 2 is obtained shows output by moment of torsion Displaying Meter 5; The output terminal of described torque sensor 2 adopts electric current input connection to be connected with monitoring device 7 by shielded cable 8, shows the torque value of output and the torque value comparison that moment of torsion Displaying Meter 5 shows output, to determine the state of torque monitoring by monitoring device 7.
Particularly, in the specific implementation, by comparing the displayed value of 5 of monitoring device 7 and moment of torsion Displaying Meters, torque condition is monitored, according to the difference of monitoring device 7 and 5 demonstrations of moment of torsion Displaying Meter, carried out error in judgement.The output terminal of described torque sensor 2 is connected with amplifier 3, and the output terminal of amplifier 3 is connected with moment of torsion Displaying Meter 5 by signal processing circuit 6, and the output terminal of amplifier 3 is connected with monitoring device 7 by shielded cable.Signal processing circuit 6 and moment of torsion Displaying Meter 5 are all placed in platform bit test system control cabinet 4, and power measurement arrangement 1, signal processing circuit 6, moment of torsion Displaying Meter 5, torque sensor 2 and amplifier 3 are the existing structure of existing school bus platform position.
After analysis of experiments, drawing, the essential factor that affects the torque value fluctuation of school bus platform position power measurement arrangement 1 is the final display error that in the interior signal conversion processes process of platform bit test system control cabinet 4, components and parts are produced by external interference.And the error that torque sensor 2 and amplifier 3 produce is relatively little, for secondary cause, therefore, consideration articulates an independent digital instrument showing at the analog signal output through amplifier 3 outputs, it is monitoring device 7, described monitoring device can independently be realized simulating signal to conversion and the digital signal processing of digital signal, and the final numeral that realizes shows.As long as being more than or equal to the accuracy class of moment of torsion Displaying Meter 5, the accuracy class of monitoring device 7 can carry out effectively contrast monitoring, can set rational two table monitoring franchises according to technological requirement, the torque value variation showing when monitoring device 7 and moment of torsion Displaying Meter 5 is in tolerance time, represent that platform bit test system stability is reliable, when two expressions are worth, remind school bus personnel needs calibrating table position again when overproof.
In the specific implementation, 1), the selection issue of monitoring device 7 consider following problem:, select suitable digital displaying meter, outside selecting suitable Connection Mode realization demonstration, not only to guarantee that indication range requires and stability requirement, also will guarantee not affect the signal intensity of system own after connecting system.2), because platform position site environment is harsh, signal disturbs stronger, instrument signal input can cause instrument signal to show unstable phenomenon while adopting plain conductor, therefore needs to adopt special-purpose anti-interference shielding line to carry out signal transmission, and monitoring device will be selected suitable anti-interference mode simultaneously.3), the moment of torsion indicating value of monitoring device 7 different from the moment of torsion indicating value refreshing frequency of moment of torsion Displaying Meter 5 (integrating range that is both is different), and under the same immunity mode of monitoring device 7, the larger anti-jamming effectiveness of anti-interference rank is better, but the measurement response time is longer.Meeting as too small in both integrating ranges causes the torque value that shows unstable, and torque value is fluctuated, though reflect really the change procedure of moment of torsion, is unfavorable for operator's reading; The excessive torque value that can cause torque monitoring instrument hysteresis measurement of power to show cashier's office in a shop.Be the excessive or too small consistance that all cannot realize two meter readings of integrating range, therefore appropriate monitoring device refreshing frequency need to be set.
In the embodiment of the present invention, the intelligent digital alarm XMTA-2000 that monitoring device 7 selects the long-range instrucment and meter plant in Shenyang City to produce, between the connection terminal of the output terminal of amplifier 3 and monitoring device 7, select electric current input connection, No. 1 pin that is about to monitoring device 7 connects the signal wire negative pole of amplifier 3 outputs, after No. 4 of monitoring device 7, No. 5 pins are connected, is connected with the signal positive pole of amplifier 3 books.Through test, shielded cable 8 need to be selected the anti-interference shielding line of 2*0.5mm or other specifications, selects anti-impulse disturbances pattern, otherwise can affect the stability of monitor institute picked up signal, thereby occur showing unstable phenomenon on monitoring device 7 simultaneously.The immunity mode of monitoring device 7 is chosen to be 19 grades.
No. 23 pins of monitoring device 7, No. 24 pins are connect to AC 220V power supply, for monitoring device 7 power supplies, to carry out the independent processes such as signal processing, reduce because increasing and connect the impact of load on system signal decay.No. 22 pin effective groundings of monitoring device 7.
The signal output part of the signal wire of monitoring device 7 and amplifier 3 outputs is connected, specifically can with the signal amplification case of amplifier 3 in test board position in, or be connected to the input end of the signal processing circuit 6 of power-measuring system switch board 4.For convenience of monitoring device 7 and moment of torsion Displaying Meter 5, carry out numeral contrast, monitoring device 7 is generally placed near platform bit test system control cabinet 4, selects the input end of platform bit test system control cabinet 4 interior signal processing circuits 6 as tie point.
Connect monitoring device 7 power supplys, set instrument underlying parameter, the instrument refreshing frequency that especially attentional selection is suitable is mated with the refreshing frequency of power-measuring system, increases substantially antijamming capability, realizes signal and shows stable.
By platform position power measurement arrangement moment of torsion, demarcate rules and carry out torque calibration, adjust instrument zero-bit coefficient when unloaded, full load adjustment gain coefficient makes instrument linearity and accurately shows the torque value of respectively examining and determine point.
According to technological requirement, set the demonstration difference of 7 of rational moment of torsion Displaying Meter 5 and monitoring devices, while carrying out platform bit test, contrast monitoring device 7 carries out platform position judgement of stability at every turn.When the torque value variation of monitoring device 7 and moment of torsion Displaying Meter 5 is in tolerance, represent that platform bit test system stability is reliable, when being worth, two expressions remind school bus personnel needs calibrating table position or carry out the disposal of other necessity again when overproof.Usually, the franchise of the torque value of 5 of monitoring device 7 and moment of torsion Displaying Meters is ± 0.3%FS.
Claims (5)
1. for school bus platform position, monitor in real time a method for torque condition, the moment of torsion Displaying Meter (5) that comprises power measurement arrangement (1) and be positioned at platform bit test system control cabinet (4); Power measurement arrangement (1) obtains torque value by torque sensor (2), and the torque value that described torque sensor (2) is obtained shows output by moment of torsion Displaying Meter (5); It is characterized in that: the output terminal of described torque sensor (2) adopts electric current input connection to be connected with monitoring device (7) by shielded cable (8), by monitoring device (7), show the torque value of output and the torque value comparison that moment of torsion Displaying Meter (5) shows output, to determine the state of torque monitoring.
2. the method for monitoring in real time torque condition for school bus platform position according to claim 1, it is characterized in that: the output terminal of described torque sensor (2) is connected with amplifier (3), the output terminal of amplifier (3) is connected with moment of torsion Displaying Meter (5) by signal processing circuit (6), and the output terminal of amplifier (3) is connected with monitoring device (7) by shielded cable.
3. the method for monitoring in real time torque condition for school bus platform position according to claim 1, is characterized in that: described monitoring device (7) works in anti-impulse disturbances pattern.
4. the method for monitoring in real time torque condition for school bus platform position according to claim 1, is characterized in that: described shielded cable (8) adopts the anti-interference shielding line of 2*0.5mm.
5. the method for monitoring in real time torque condition for school bus platform position according to claim 1, is characterized in that: described monitoring device (7) adopts 220V alternating current to power separately.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310545079.1A CN103575437B (en) | 2013-11-06 | 2013-11-06 | Method for real-time monitoring of torque state of calibration platform |
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| CN201310545079.1A CN103575437B (en) | 2013-11-06 | 2013-11-06 | Method for real-time monitoring of torque state of calibration platform |
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| CN103575437A true CN103575437A (en) | 2014-02-12 |
| CN103575437B CN103575437B (en) | 2017-02-08 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0961276A (en) * | 1995-08-23 | 1997-03-07 | Toyota Motor Corp | Method for compensating torque meter and torque meter using the method |
| CN101246066A (en) * | 2007-02-14 | 2008-08-20 | 中国船舶重工集团公司第七○四研究所 | On-site torsion calibration device |
| CN101324453A (en) * | 2008-07-16 | 2008-12-17 | 中建八局第二建设有限公司 | Method and device for calibrating instrument |
| CN202485859U (en) * | 2012-01-05 | 2012-10-10 | 哈尔滨飞机工业集团有限责任公司 | Device for checking helicopter engine torque system |
| CN102937527A (en) * | 2012-10-19 | 2013-02-20 | 奇瑞汽车股份有限公司 | Calibrator used for detecting measurement accuracy of fuel consumption of engine pedestal |
-
2013
- 2013-11-06 CN CN201310545079.1A patent/CN103575437B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0961276A (en) * | 1995-08-23 | 1997-03-07 | Toyota Motor Corp | Method for compensating torque meter and torque meter using the method |
| CN101246066A (en) * | 2007-02-14 | 2008-08-20 | 中国船舶重工集团公司第七○四研究所 | On-site torsion calibration device |
| CN101324453A (en) * | 2008-07-16 | 2008-12-17 | 中建八局第二建设有限公司 | Method and device for calibrating instrument |
| CN202485859U (en) * | 2012-01-05 | 2012-10-10 | 哈尔滨飞机工业集团有限责任公司 | Device for checking helicopter engine torque system |
| CN102937527A (en) * | 2012-10-19 | 2013-02-20 | 奇瑞汽车股份有限公司 | Calibrator used for detecting measurement accuracy of fuel consumption of engine pedestal |
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