CN100348956C - Device for sensing carload - Google Patents
Device for sensing carload Download PDFInfo
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- CN100348956C CN100348956C CNB2005100254827A CN200510025482A CN100348956C CN 100348956 C CN100348956 C CN 100348956C CN B2005100254827 A CNB2005100254827 A CN B2005100254827A CN 200510025482 A CN200510025482 A CN 200510025482A CN 100348956 C CN100348956 C CN 100348956C
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Abstract
The present invention relates to an automobile load sensing device, which is used for the technical field of automobile overload automatic identification systems. The present invention comprises a high pressure resistance rubber air bag, a main pressure sensor, an auxiliary pressure sensor, a first signal transmission cable, a first signal transmission redundancy cable, a second signal transmission cable and a second signal transmission redundancy cable, wherein the high pressure resistance rubber air bag instantly transmits the sensed pressure in a sealed containing cavity to pressure inductors arranged on the main pressure sensor and the auxiliary pressure sensor; output signals of the main pressure sensor and the auxiliary pressure sensor are respectively led out by the first signal transmission cable and the second signal transmission cable; the first signal transmission redundancy cable and the second signal transmission redundancy cable are respectively repeated passages of the output signals of the main pressure sensor and the auxiliary pressure sensor. The present invention has the advantages of high reliability, operation stability, maintenance-free performance and strong practicability.
Description
Technical field
The present invention relates to a kind of sensing device that is used for the automatic identification system for vehicle overload technical field, specifically, is a kind of device for sensing carload.
Background technology
Quite serious in China's truck overload and illegal repacking loading phenomenon, cause most highways and bridge to be in the overburden running status for a long time, not only have a strong impact on the serviceable life of highway and bridge, but also cause the frequent accidents in the vehicle ' process to take place, particularly some highway can't bear the heavy load especially, very dangerous.To thoroughly avoid and prevent the generation and the existence of this type of phenomenon, outside-the-system except strengthening improving the traffic legal construction and setting up scientific management, more crucial is also to have the modern technological means of a cover to be assisted solution, and improves the monitoring automation degree.
Find by prior art documents, Su Qingzu: (the ZL patent No.: 02138337.5 of weighing instrument in the portable running-vehicle, Granted publication number: CN1152238C) can realize real-time measurement and evaluation, and can not influence the cruising of automobile on road to automobile load.This patent of invention technology places the road surface with the rubber pressure oil pipe, and the oil pipe end is equipped with manual pump and pressure transducer, through pressure transducer pressure signal is transferred to the signal Processing instrument.Can adopt pressure oil pipe vertical with vehicle running route or form an angle and arrange or on the road surface, be ladder-like arranged according to different needs, and multiple-tubing string arrange simultaneously etc. that various ways places oil pipe.This technology is except can be at static, low speed and at a high speed measured automobiles wheel load, axle load and the gross mass, speed and wheelbase that can also measured automobiles.Above-mentioned technical feature is worth certainly, what but this technology adopted is " rubber pressure oil pipe ", add " pressure transducer ", being equipped with " manual pump " again carries out oil-filled to " rubber pressure oil pipe ", obviously have three big technological deficiencies: (1) oil is a kind of incompressible fluid, the internal capacity of oil pipe can produce gross distortion and expansion along with the rising of load, therefore can cause the maximum error of pressure conduction; (2) modular load sensing unit, the sealing property of its internal flow are difficult to guarantee, will certainly cause its practicality greatly to reduce; (3) outfit " manual pump " is oil-filled in addition, and the corresponding oil pressure caliberating device of configuration of must still needing in the practicality causes the further decline of its practicality.
Summary of the invention
The objective of the invention is to deficiency, a kind of device for sensing carload is provided, make it have higher reliability, operation stability, maintenance-free performance and stronger practicality at existing automobile overload recognition technology existence.
The present invention is achieved by the following technical solutions, the present invention includes: high pressure resistant rubber pneumatic bag, primary pressure sensor, the secondary stress sensor, first signal-transmitting cable, the first signal transmitting redundancy cable, the secondary signal transmission cable, secondary signal transmitting redundancy cable, high pressure resistant rubber pneumatic bag is delivered to pressure inductor on primary pressure sensor and the secondary stress sensor immediately with the pressure experienced in the cavity volume of sealing, primary pressure sensor and secondary stress signal of sensor are drawn by default first signal-transmitting cable and secondary signal transmission cable respectively, and the first signal transmitting redundancy cable and secondary signal transmitting redundancy cable are respectively the repetition passage of primary pressure sensor and secondary stress sensor output signal.
Described high pressure resistant rubber pneumatic bag is the cylinder of closed at both ends, interior diameter is 100mm, wall thickness is determined according to the withstand voltage ultimate value of tartan, material thickness when withstand voltage ultimate value reaches MPa is the thickness of high pressure resistant rubber pneumatic bag 1, length is determined according to actual highway throat width, the sealing gas set pressure is 0.1MPa, and it is 1MPa that maximum allows to bear pressure.
Described primary pressure sensor and secondary stress sensor, its pressure sensitive range all has 0～1.5Mpa.The setting of two pressure transducers can improve the redundance of device functional reliability, and can handle with information extraction for pressure signal again provides the sufficient information resource, and transducing signal is by first signal-transmitting cable and the output of secondary signal transmission cable.
Described high pressure resistant rubber pneumatic bag, primary pressure sensor and secondary stress sensor constitute incorporate gas-flow closure body.
Described first signal-transmitting cable, the first signal transmitting redundancy cable, secondary signal transmission cable and secondary signal transmitting redundancy cable, its cable is the twin-core shielding line.The effect of twin-core shielding line is that pressure sensor signal can adopt multiple input mode flexibly to follow-up data acquisition input port, when signal wire is earth-free, can adopt the input of transducing signal symmetric difference to improve common mode rejection performance to follow-up data acquisition, outer shielding layer grounding can effectively overcome the sneak into interference of road ambient stray field to signal, in the time need adopting asymmetric input, as long as any single core wherein is connected with the grounded shield line to follow-up data acquisition.
When automobile enters the mouth by highway, high pressure resistant rubber pneumatic bag is delivered to pressure inductor on primary pressure sensor and the secondary stress sensor immediately with the pressure experienced in the cavity volume of sealing, conversion of signals through inductor, the output port of primary pressure sensor and secondary stress sensor have simultaneously one with the output of the linear electric signal of pressure, the electric pressure signal of primary pressure sensor is drawn for follow-up data acquisition by first signal-transmitting cable and the first signal transmitting redundancy cable and is used, and the secondary stress sensor is drawn for follow-up data acquisition by secondary signal transmission cable and secondary signal transmitting redundancy cable and used.
The present invention is in order to improve the reliability of device, and transducing signal repeats output by paired cable, therefore can improve maintenance-free performance.The present invention also presets the secondary stress sensor to improve the device reliability redundance.The secondary stress sensor is prepared for the accidental damage of anti-primary pressure sensor, therefore can prolong expected service life of the present invention.
In sum, the present invention has higher reliability, operation stability, maintenance-free performance and stronger practicality.
Description of drawings
Fig. 1 is a structural representation of the present invention
Embodiment
As shown in Figure 1, the present invention includes: high pressure resistant rubber pneumatic bag 1, primary pressure sensor 2, secondary stress sensor 3, first signal-transmitting cable 4, the first signal transmitting redundancy cable 5, secondary signal transmission cable 6, secondary signal transmitting redundancy cable 7, high pressure resistant rubber pneumatic bag 1 is delivered to pressure inductor on primary pressure sensor 2 and the secondary stress sensor 3 immediately with the pressure experienced in the cavity volume of sealing, primary pressure sensor 2 is drawn with secondary signal transmission cable 6 by the first default signal-transmitting cable 4 respectively with the output signal of secondary stress sensor 3, and the first signal transmitting redundancy cable 5 and secondary signal transmitting redundancy cable 7 are respectively the repetition passage of primary pressure sensor 2 and secondary stress sensor 3 output signals.
Described high pressure resistant rubber pneumatic bag 1 is the cylinder of closed at both ends, interior diameter is 100mm, wall thickness is determined according to the withstand voltage ultimate value of tartan, material thickness when withstand voltage ultimate value reaches MPa is the thickness of high pressure resistant rubber pneumatic bag 1, length is determined according to actual highway throat width, the sealing gas set pressure is 0.1MPa, and it is 1MPa that maximum allows to bear pressure.
Described primary pressure sensor 2 and secondary stress sensor 3, its pressure sensitive range all has 0～1.5Mpa.
Described high pressure resistant rubber pneumatic bag 1, primary pressure sensor 2 and secondary stress sensor 3 constitute incorporate gas-flow closure body.
Described first signal-transmitting cable 4, the first signal transmitting redundancy cable 5, secondary signal transmission cable 6 and secondary signal transmitting redundancy cable 7, its cable is the twin-core shielding line.
When automobile enters the mouth by highway, high pressure resistant rubber pneumatic bag 1 is directly accepted the collision and the weight of automobile, the real-time successively quality with vehicle wheel shaft shows with the form that seal gas pressure in the high pressure resistant rubber pneumatic bag 1 changes, the seal gas pressure variation is delivered to primary pressure sensor 2 and secondary stress sensor 3 at once, primary pressure sensor 2 converts the pressure signal of sensing to electric signal at once with secondary stress sensor 3, the electric signal of primary pressure sensor 2 is by first signal-transmitting cable 4 and 5 outputs of the first signal transmitting redundancy cable, the electric signal that secondary stress sensor 3 induces is by secondary signal transmission cable 6 and 7 outputs of secondary signal transmitting redundancy cable, so that offer follow-up data acquisition module and computing module carries out signal Processing and information extraction.
Implementation result is very remarkable:
4 tons of carloads
Travel speed 20km/h, 40km/h, 60km/h
Apparatus of the present invention experiment length 3.6m
The experiment proved that the pressure distribution curve that sensing is exported was clear, feature outstanding when automobile passed through the technology of the present invention with the following speed of a motor vehicle of 60km/h, signal to noise ratio (S/N ratio)＞80dB can provide enough carload information for a back grade processing fully simultaneously.
Claims (4)
1, a kind of device for sensing carload, comprise: primary pressure sensor (2), first signal-transmitting cable (4), secondary signal transmission cable (6), it is characterized in that, also comprise: high pressure resistant rubber pneumatic bag (1), secondary stress sensor (3), the first signal transmitting redundancy cable (5), secondary signal transmitting redundancy cable (7), high pressure resistant rubber pneumatic bag (1) is delivered to pressure inductor on primary pressure sensor (2) and the secondary stress sensor (3) immediately with the pressure experienced in the cavity volume of sealing, primary pressure sensor (2) is drawn by default first signal-transmitting cable (4) and secondary signal transmission cable (6) respectively with the output signal of secondary stress sensor (3), the first signal transmitting redundancy cable (5) and secondary signal transmitting redundancy cable (7) are respectively the repetition passage of primary pressure sensor (2) and secondary stress sensor (3) output signal, described high pressure resistant rubber pneumatic bag (1) is the cylinder of closed at both ends, interior diameter is 100mm, wall thickness is determined according to the withstand voltage ultimate value of tartan, material thickness when withstand voltage ultimate value reaches MPa is the thickness of high pressure resistant rubber pneumatic bag (1), length is determined according to actual highway throat width, the sealing gas set pressure is 0.1MPa, and it is 1MPa that maximum allows to bear pressure.
2, device for sensing carload according to claim 1 is characterized in that, described high pressure resistant rubber pneumatic bag (1), primary pressure sensor (2) and secondary stress sensor (3) constitute incorporate gas-flow closure body.
3, device for sensing carload according to claim 1 is characterized in that, described primary pressure sensor (2) and secondary stress sensor (3), and its pressure sensitive range all has 0～1.5Mpa.
4, device for sensing carload according to claim 1, it is characterized in that, described first signal-transmitting cable (4), the first signal transmitting redundancy cable (5), secondary signal transmission cable (6) and secondary signal transmitting redundancy cable (7), its cable is the twin-core shielding line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100254827A CN100348956C (en) | 2005-04-28 | 2005-04-28 | Device for sensing carload |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100254827A CN100348956C (en) | 2005-04-28 | 2005-04-28 | Device for sensing carload |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1687719A CN1687719A (en) | 2005-10-26 |
| CN100348956C true CN100348956C (en) | 2007-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100254827A Expired - Fee Related CN100348956C (en) | 2005-04-28 | 2005-04-28 | Device for sensing carload |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2703825B1 (en) * | 2012-08-31 | 2020-01-22 | Meggitt SA | Force sensor and method for testing its reliability |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2351978A1 (en) * | 1973-10-17 | 1975-04-30 | Griffit International Pty Ltd | Vehicle weighing scales with weighing plate for load - has indicator connected to flexible pressure tube |
| US4431072A (en) * | 1982-01-05 | 1984-02-14 | Stepp Sylvan G | Weighing device |
| DE10030245A1 (en) * | 2000-06-20 | 2002-01-03 | Marco Heyd | Drive-on weighing device for transportation vehicles, includes computer to correlate the pressure measured by a pressure measuring equipment with the weight via stored calibration curve |
| CN2529220Y (en) * | 2002-03-15 | 2003-01-01 | 王江东 | Display devices of electronic belt coveyer scale |
| CN2585199Y (en) * | 2002-09-25 | 2003-11-05 | 江苏大学 | Portable weighing instrument for loading of vehicle when it running |
| CN1152238C (en) * | 2002-09-25 | 2004-06-02 | 江苏大学 | Portable running-vehicle weighing instrument |
-
2005
- 2005-04-28 CN CNB2005100254827A patent/CN100348956C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2351978A1 (en) * | 1973-10-17 | 1975-04-30 | Griffit International Pty Ltd | Vehicle weighing scales with weighing plate for load - has indicator connected to flexible pressure tube |
| US4431072A (en) * | 1982-01-05 | 1984-02-14 | Stepp Sylvan G | Weighing device |
| DE10030245A1 (en) * | 2000-06-20 | 2002-01-03 | Marco Heyd | Drive-on weighing device for transportation vehicles, includes computer to correlate the pressure measured by a pressure measuring equipment with the weight via stored calibration curve |
| CN2529220Y (en) * | 2002-03-15 | 2003-01-01 | 王江东 | Display devices of electronic belt coveyer scale |
| CN2585199Y (en) * | 2002-09-25 | 2003-11-05 | 江苏大学 | Portable weighing instrument for loading of vehicle when it running |
| CN1152238C (en) * | 2002-09-25 | 2004-06-02 | 江苏大学 | Portable running-vehicle weighing instrument |
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| Publication number | Publication date |
|---|---|
| CN1687719A (en) | 2005-10-26 |
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Owner name: TRW AUTOMOTIVE COMPONENTS SHANGHAI CO., LTD. Free format text: FORMER OWNER: SHANGHAI JIAOTONG UNIVERSITY Effective date: 20100331 |
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Free format text: CORRECT: ADDRESS; FROM: 200240 NO.800, DONGCHUAN ROAD, MINHANG DISTRICT, SHANGHAI CITY TO: 201814 NO.188, BAI AN ROAD, ANTING TOWN, JIADING DISTRICT, SHANGHAI CITY |
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Effective date of registration: 20100331 Address after: 201814 Shanghai city Anting town Jiading District Bai'an Road No. 188 Patentee after: Tianhe automotive parts (Shanghai) Co., Ltd. Address before: 200240 Dongchuan Road, Shanghai, No. 800, No. Patentee before: Shanghai Jiao Tong University |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071114 Termination date: 20160428 |