CN1192531A - Automatic measuring apparatus for weighing load and vehicle - Google Patents
Automatic measuring apparatus for weighing load and vehicle Download PDFInfo
- Publication number
- CN1192531A CN1192531A CN 98100782 CN98100782A CN1192531A CN 1192531 A CN1192531 A CN 1192531A CN 98100782 CN98100782 CN 98100782 CN 98100782 A CN98100782 A CN 98100782A CN 1192531 A CN1192531 A CN 1192531A
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- load
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- 238000005303 weighing Methods 0.000 title claims description 17
- 238000006073 displacement reaction Methods 0.000 claims abstract description 27
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 238000005516 engineering process Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 5
- 239000010720 hydraulic oil Substances 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims 1
- 239000013585 weight reducing agent Substances 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000012806 monitoring device Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The invented apparatus can accurately display the actual loading and limit the overload running, and can also monitor the technical condition of the chassis of the automobile and the tilt of the vehicle body under the bad road condition. Said apparatus is composed of front hyraulic displacement sensor, rear hydraulic displacement sensor, vacuum main pump, electric control device, and instrument display monitoring circuit. Said product features simple structure, convenient, practical, strong reliability, fairly high accuracy and sensitivity, good repeatability and long service life.
Description
The present invention relates to a kind of check weighing Instrument technology field that belongs to.The instrument that automobile-carried weight is measured, and automatic measuring apparatus for weighing load and vehicle.
At present, China is state-run, collective and individual transportation family increase day by day, overloads for improving conevying efficiency, causes traffic hazard to account for 80% of traffic accident.Caused very big loss for the country and people's lives and properties.Detect load-carrying and limiting overload now following three kinds of ways arranged:
One, the vehicle that adopts weighbridge will be loaded with goods claims general assembly (TW), and then deducts light weight, promptly obtains the weight of loads.This method is subjected to condition restriction, and is very inconvenient, the cost height.
Two, traffic administration only relies on visual observations, and whether the management overload is permitted travelling, and is far from being accurately.
Three, by the retrieval background technology: 1, utilize the displacement of leaf spring or the displacement at back axle center, measure the dead weight capacity of motor vehicle by hydraulic pressure, resistance, tire pressure.These methods are not because the displacement variable quantity waits, and center of deadweight is inconsistent, and the influence of temperature, humidity, sea level elevation brings bigger error all can for the measurement load-carrying, and hydraulic method also can overcome the effect of motor vehicle integral vibration damping.2, add unloading mechanism, when Weighing, the compartment goods is risen, and the escape maneuver chassis, after weighing finished, the compartment descended and sets back.Or the two girder construction sensors that become of resistance-strain chip, it is adorned on the dried motor vehicle cabin plate sill.These methods are installed complicated, and the cost height is firmly installed for the compartment and brought disadvantage, influences the one-piece construction of vehicle, and are subjected to temperature, humidity effect bigger, and check weighing is inaccurate.
Owing to above reason, make motor vehicle carry weight sensing instrument and can only pace up and down in the laboratory, lost its social use value.
In order to overcome above-mentioned deficiency, the object of the present invention is to provide a kind of automatic accurate load-carrying weighing, and limiting overload travels the comprehensive meter displaying device of monitor vehicle chassis technology situation.
The present invention seeks to realize like this, it makes vehicle longeron and front spring spring cushion block and back axle skin produce displacement according to the effect of lade W.Produce the average displacement amount by sensor hydraulic pressure intercommunication pipeline, promote the master cylinder hydraulic piston, driving the vacuum cylinder piston moves, produce the negative-pressure vacuum signal, through silicon pressure sensor, physical quantity is become electric weight, carry out the automatic compensating signal of temperature, humidity and amplify and adjust a kind of load-carrying weighing monitoring device of a kind of electric signal corresponding by the instrument demonstration with dead weight capacity.It comprises hydraulic displacement sensor behind two preceding hydraulic pressure displacement sensors and two, vacuum master cylinder, electrical control gear, meter display circuit.It is characterized in that: hydraulic displacement sensor top, described front and back is provided with one and has pipe joint 4 and bleed screw 1, sender unit cap 3, and outer rim suit one sensor housing 8 at sensor bar is provided with a fluid sealant holder 5 in the upper end of sensor bar.Be provided with a sensor positioning switch 11 in the described bottom of the sensor bar of hydraulic displacement sensor afterwards, and shaft one side at sensor bar is provided with one group of sliding contact 9, the sensor housing bottom connects a slide potentiometer 10.Put in the first speed after loading or second gear starting when travelling, energized begins the load-carrying weighing.And by back sensor sliding contact monitoring chassis technology situation and tilting of car body angle, during the overload starting, it is bright that sliding contact is connected overload district pilot lamp, by delay circuit 41, closed language alarm 49 disconnects 48 simultaneously and makes ignition coil for gasoline engine outage or diesel motor oil-break stop working, stop to travel, if the road conditions of travelling are good, sight line reaches requirement, according to China's national situation and automobile making technology, can carry at wide-ultra and travel.Through car owner, managerial personnel's approval, open key switch 50, it is normal that motor car engine recovers, and can travel.Four hydraulic displacement sensor hydraulic pressure lifting surface areas equal master cylinder hydraulic piston lifting surface area (4S
2=total S
2), total promote the total pump piston return, four rodmeters are pitched at car body by pump spring 32, tilt, can be with 14,21 servo-actuateds of sensor bar stress point.The intercommunication of sensor hydraulic tube produces balanced displacement, and the piston 29 that drives in the vacuum cylinder body moves generation negative-pressure vacuum suction.By MPX type silicon vacuum transducer 25, non-electric physical quantity is converted to electric weight, carry out the temperature humidity compensation, adjust in time to feed back in the meter display circuit and go, thereby realize automatic weighing monitoring.The motor vehicle leaf spring surpasses 500,000 kilometers, and fatigue strength increases, and rigidity weakens, and has influenced the accuracy of sensor displacement.Can transfer than circuit 54 by known load-carrying, can also obtain measuring accuracy accurately.
Stop to travel, drive at moderate speed, load-carrying weighing when running at high speed, monitoring device quits work, and utilizes motor vehicle air tank pressurized air, promotes total pump piston, and the front and back rodmeter is sucked back in the housing.In order to alleviate the weight of sensor bar, four rodmeters are moulds the nylon manufacturing by force.
Below the invention process example is done an explanation: vehicle: east wind 140-1 license number: Ji H4020298 date of production: in Dec, 90 payload ratings: 5000Kg supply voltage: accumulator 12V measurement range: 20kg-8000kg display mode: load-carrying instrument display machines motor-car technology status: good unloaded front sensor coverage: the 100mm that measures, back sensor coverage 150mm, payload ratings 5000kg carrying capacity, measure longeron and front spring spring cushion block displacement 50mm, floor side member and back axle skin displacement 70mm.
Use the MPX4100 vacuum transducer, the amplifying signal circuit adopts the DEV173 circuit board.In order to make negative-pressure vacuum suction and full scale coupling, resistance R 1 will change 61.9K into from 93K Ω, resistance R
4100 Ω change 81.6 Ω into, and therefore, effectively the negative-pressure vacuum suction and the voltage full scale amplitude of oscillation are mated.The full scale amplitude of oscillation is 4.9V, when negative-pressure vacuum suction is zero, and aanalogvoltage 0.5V, the output voltage during full scale high 4.4V during than zero pressure.Adjustable resistance R7 is used for unloaded zeroing biasing.
All reach designing requirement through the actual performance test.
| Sequence number | Test event | Permissible error | The actual measurement maximum error | Conclusion |
| ???1 | Display precision | ????±1 | ????????0.02 | Qualified |
| ???2 | The change in voltage influence | ????±1 | ????????0.06 | Qualified |
| ???3 | Variation of ambient temperature | ????+60℃ ????????±1 ????-30℃ | ????????0.06 | Qualified |
| ???4 | The mechanical vibration test | ????±1 | ????????0.03 | Qualified |
The error that the present invention has avoided the inconsistency of load system to bring to measurement.Higher sensitivity is arranged, and it is good to repeat performance, stable performance, long service life.
Below in conjunction with accompanying drawing and enforcement principle, fitting operation further specifies:
Fig. 1 is a preceding hydraulic displacement Fundamentals of Sensors structural drawing of the present invention.
Fig. 2 is the original structure figure of back of the present invention hydraulic displacement sensor.
Fig. 3 is preceding hydraulic displacement sensor scheme of installation.
Fig. 4 is a back hydraulic displacement sensor scheme of installation.
Fig. 5 is a vacuum master cylinder longitudinal profile structural representation.
Fig. 6 is the hydraulic vacuum system chart.
Fig. 7 is for operating, warn, live the car electrical schematic diagram.
Fig. 8 is vacuum signal amplification, temperature, humidity, compensation, adjustment meter display circuit block diagram.
Among the figure: 1, bleed screw; 2, brake fluid; 3, sender unit cap; 4, pipe joint; 5, fluid sealant holder; 6, mould the nylon sensor bar by force; 7, fixed screw; 8, sensor housing; 9, sliding contact; 10, slide potentiometer; 11, sensor positioning switch; 12, motor vehicle depth; 13, front sensor; 14, preceding buffer stopper; 15, front spring spring; 16, anterior arch clip; 17, propons; 18, vibration damper; 19, back buffer stopper; 20, back sensor; 21, back axle; 22, cylinder tube pipeline connector; 23, hand oil pump; 24, piston top dead center pilot lamp; 25, vacuum transducer; 26, fluid pressure line joint; 27, filling hydraulic oil port; 28, cylinder piston; 29, vacuum cock; 30, hydraulic piston; 31, cylinder piston; 32, retracing spring; 33, master cylinder cylinder body; 34, accumulator; 35, fusible link; 36, master cylinder valve solenoid valve; 37, stabilized voltage supply; 38, monitoring pilot lamp; 39, vacuum transducer; 40, sliding contact; 41, delay circuit; 42, overload warning lamp; 43, generator; 44, starter; 45, button circuit switch; 46, starting gear switch; 47, sensor positioning switch; 48, engine is lived stopping switch; 49, overload language warning switch; 50, overload scope key switch; 51, limit for tonnage pilot lamp; 52, the general instrument of showing of load-carrying; 53, printed tickets; 54, transfer effect resistance; 55, signal amplification circuit power supply; 56, transmission line; 57, temperature, humidity, compensating signal amplifying circuit; 58, vacuum transducer; 59, vacuum ports; 60, vacuum source.
Open the filling hydraulic oil port, add hydraulic oil, the hydraulic total pump piston keeps top dead center position, by hand oil pump 23 to sensor pipeline force feed. Open the bleed screw venting, sensor is interior without air-resistance phenomenon before and after making, and total pump piston is in top dead center position. Cylinder tube pipeline connector 22 is connected with motor vehicle normal pressure air tank compressed air, obtains power, promotes total pump piston and reaches lower dead center, makes the master cylinder hydraulic piston also reach lower dead center. The front and back rodmeter sucked back be in the position that quits work in the cylinder body. Starting gear switch 46 is contained in the speed changer starting, and plugged does not leak magnetic valve with the normal pressure IC Intake Valve Closes when one grade or second gear starting, and exhaust valve is opened, and vacuum valve cuts out, and the checkout gear circuit is started working, and instrument demonstrates actual load-carrying. When unloaded, KA, KB indicator lamp are bright, prove that hydrostatic sensor reaches the idle position. When being loaded in specified carrying capacity, the sliding contact indicator lamp is glittering in standard regions. When loading above specified carrying capacity, it is bright that sliding contact is connected overload district indicator lamp, by delay circuit 41 closed language alarms 49, disconnects simultaneously 48, and ignition coil for gasoline engine outage or Diesel engine oil-break are stopped working.
If stop, when needing to detect the hauling capacity of a locomotive, can open hand switch 45, can connect each circuit power of monitoring device, instrument begins the loading display amount. Monitoring device can show also goods whether carry by side. Hand leaves switch 45, each power cut-off, and master cylinder sucks back sensor bar in the cavity, and the weighing monitoring quits work.
The monitoring indicator lamp is parallel glittering or to differ from a lamp glittering, is normal, as it is parallel glittering to differ from two lamps, tilting of car body be described greatly or there is fault on a side chassis, should take care.
The present invention is applicable to various carryings, goods carrying vehicle.
Claims (6)
1, a kind of automatic measuring apparatus for weighing load and vehicle, it comprises two preceding hydraulic displacement sensors, hydraulic displacement sensor after two, vacuum master cylinder, hydrovac, electrical control gear, meter display circuit.It is characterized in that: the top of hydraulic displacement position, described front and back sensor sensor bar is provided with outer rim suit one sensor housing (8) of the device lid (3) of bleed screw (1) pipe joint (4) sensor at sensor bar, be provided with a fluid sealant holder (5) on the top of rodmeter, bottom at described back hydraulic displacement rodmeter is provided with a sensor positioning switch (11), and, shaft one side at sensor bar is provided with one group of sliding contact (9), and the sensor housing bottom connects a slide potentiometer (10).
2, technical characterictic according to claim 1, wherein hydraulic oil uses the above hydraulic oil of LG3, gets rid of air-resistance phenomenon by bleed screw (1).In order to make sensor in parking, middling speed, quit work when running at high speed, make the sensor bar weight reduction, rodmeter is for moulding the nylon manufacturing by force.
3, a kind of by the balanced displacement of hydraulic pressure, drive vacuum cylinder piston (2) and move the generation negative pressure.By silicon pressure sensor (25) non-electric physical quantity is converted to electric weight, carries out the temperature compensation adjustment, in time feed back to the instrument loading display.
4, technical characterictic according to claim 3, wherein the hydraulic pressure lifting surface area of four hydraulic displacement rodmeters equals master cylinder hydraulic piston lifting surface area, the intercommunication of four sensor pipelines, total pump spring (32) promotes the master cylinder hydraulic piston, can make four rodmeters with center of effort (14) (21) servo-actuated, produce balanced displacement, negative pressure signal appears in master cylinder, measures dead weight capacity by negative pressure signal.Weaken in order to reduce the leaf spring rigidity, influence measuring accuracy, can pass through known dead weight capacity, transfer and finish than circuit (54).
5, a kind of motor vehicle, load-carrying weighing monitoring electrical control gear, it comprises starting gear power switch (46), manual power switch (45), overload scope key switch (50), delay circuit (41), silicon pressure sensor (49), stabilized voltage supply (37), the master cylinder gas circuit is not leaked solenoid valve (36), specified carrying capacity district pilot lamp (38), overload district pilot lamp (42), overload language caution switch (49), live stopping switch (48), sliding contact switch (40), unloaded indicator cock (47).
6, technical characterictic according to claim 5, wherein the circuit total power switch is installed on one grade of variator and the second gear starting gear position.When variator places the starting of a grade or second gear, connect the entire circuit power supply, do not leak solenoid valve and open exhaust valve, close the normal pressure inlet valve, close vacuum cylinder body inlet valve simultaneously, sensing circuit is started working, and finishes load-carrying weighing monitoring overload and lives the car task.
When unloaded, KA, KB pilot lamp are bright, proves that sensor arrives the idle position, and when load-carrying surpassed specified carrying capacity, sliding contact was connected overload district power circuit, and by circuit delay 6 seconds-10 seconds, warning lamp was bright, closed language alarm, car firmly simultaneously.
When variator places one grade or second gear, connect, the load-carrying weighing, the observation circuit power supply.The monitoring pilot lamp is started working, monitoring chassis technology situation and tilting of car body angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98100782 CN1069762C (en) | 1998-03-24 | 1998-03-24 | Automatic measuring apparatus for weighing load and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98100782 CN1069762C (en) | 1998-03-24 | 1998-03-24 | Automatic measuring apparatus for weighing load and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1192531A true CN1192531A (en) | 1998-09-09 |
| CN1069762C CN1069762C (en) | 2001-08-15 |
Family
ID=5216248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98100782 Expired - Fee Related CN1069762C (en) | 1998-03-24 | 1998-03-24 | Automatic measuring apparatus for weighing load and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1069762C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104704331A (en) * | 2012-09-11 | 2015-06-10 | 雷诺股份公司 | Device and method for estimating charge of motor vehicle |
| CN111707344A (en) * | 2020-07-14 | 2020-09-25 | 上海思寒环保科技有限公司 | Vehicle-mounted weighing system |
-
1998
- 1998-03-24 CN CN 98100782 patent/CN1069762C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104704331A (en) * | 2012-09-11 | 2015-06-10 | 雷诺股份公司 | Device and method for estimating charge of motor vehicle |
| CN111707344A (en) * | 2020-07-14 | 2020-09-25 | 上海思寒环保科技有限公司 | Vehicle-mounted weighing system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1069762C (en) | 2001-08-15 |
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Owner name: WANSHANG BUILDING, NO. 22, SHIJINGSHAN ROAD, BEIJI Free format text: FORMER NAME OR ADDRESS: WEICHANGMONGOL AUTONOMOUS COUNTY, HEBEI PROVINCE, 068455 |
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Patentee address after: 100043 Beijing No. 22 Shijingshan Road, building 1517 room business taixima company Patentee address before: 068455, Weichang Manchu and Mongolian Autonomous County, Hebei Province, three Township Forest Farm |
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Address after: 100123 room 505, International Center for international development, Chaoyang District nectar garden, Beijing, China Patentee after: Song Chengze Address before: 100077, room 0605, block A, JINGWAH commercial building, No. 92, Majiabao East Road, Beijing, Fengtai District Patentee before: Song Chengze |
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Application publication date: 19980812 Assignee: Technology (Beijing) Co., Ltd. Assignor: Song Chengze Contract record no.: 2013990000840 Denomination of invention: Automatic measuring apparatus for weighing load and vehicle Granted publication date: 20010815 License type: Exclusive License Record date: 20131216 |
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Granted publication date: 20010815 Termination date: 20170324 |