CN86107195A - The method of weighing carload lot and instrument - Google Patents
The method of weighing carload lot and instrument Download PDFInfo
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- CN86107195A CN86107195A CN 86107195 CN86107195A CN86107195A CN 86107195 A CN86107195 A CN 86107195A CN 86107195 CN86107195 CN 86107195 CN 86107195 A CN86107195 A CN 86107195A CN 86107195 A CN86107195 A CN 86107195A
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Abstract
The invention discloses a kind of method and instrument thereof of measured automobiles dead weight capacity.It mainly is the size that records carload lot by the atmospheric pressure value that gaseous tension in the measured automobiles tire changes with the size of carload lot indirectly.The present invention has utilized the isotropic character of gas pressure transmission dexterously, makes that the more existing various measuring systems of check weighing system are all simple significantly, and very high stability and measuring accuracy are arranged.And can on general road surface, carry out check weighing.Because sensor has been avoided the direct impact of automobile load bearing system, so sensor is durable in use.This instrument is with low cost, is applicable to be contained on all tire vehicles to do weighing of himself load-carrying.
Description
The invention discloses a kind of method and instrument of weighing carload lot, belong to automobile instrument and metering field.
In now all automobile instruments, just there is not a kind of instrument that is used for weighing and display automobile dead weight capacity.And various automobile weighing apparatus all are to be contained in some fixing places.Must reach car on the weighing apparatus when automobile will be weighed and to weigh up dead weight capacity come for twice back and forth.This metering method owing to break away from automobile itself, often needs the many runways of automobile, and the energy consumption of vehicle is increased.Driver, gauger, both sides of supply and demand are all felt inconvenience.The measuring control of automobile freight volume is brought great inconvenience particularly for country,, cause great waste to country because metering is inaccurate.
Existing many scientific research institutions are in the instrument of the weighing carload lot of development, and the method for its measurement has two kinds: a kind of is that the dead weight capacity of measured automobiles causes that the displacement of automobile front and rear suspension leaf spring measures the dead weight capacity of automobile indirectly when changing.This a kind of measuring method will produce very big error owing to the rigidity of the new and old leaf spring on the car is different, and the center of gravity of being uneven of ground, goods entrucking differs to also bringing bigger error to this measuring method.Another kind is to add the dead weight capacity that cover strain system or a hydraulic system come the perception automobile in addition to vehicle.The major defect of this method is the weighing system complex structure, make, install adjust, maintenance difficult, same because goods entrucking center of gravity differ to, Uneven roads etc. all can bring measuring error.These two kinds of methods are all directly born the distortion of automobile pressure bearing system because of sensor, the various impulsive forces of automobilism etc. will be directed at the premature damage of sensor.In order to adjust the error that above each side is brought, the complex structure of required secondary instrument is adjusted loaded down with trivial detailsly, has increased the production cost of weight sensing instrument widely.Owing to above reason, make weight sensing instrument can only pace up and down in the laboratory, lost its social use value.See also patent GB2112748, and Chinese patent application numbers No. 85200180.
Purpose of the present invention is exactly method and the instrument thereof that a kind of simple and easy to do measured automobiles dead weight capacity will be provided for various trucies.Adopt the required measuring system of this method measured automobiles dead weight capacity simple, accurate measurement is reliable, and is durable in use and cost is cheap, allows can directly be contained in check weighing instrument in the pilothouse and be able to real socialization and realize.
The objective of the invention is to realize as follows.As everyone knows, the pressurized air that charges in the tire is always tried hard to space maximum that it is occupied.So charge into the later inner tube of a tyre space of pressurized air, be the maximum space of the inner tube of a tyre under this condition.Distortion has taken place with rear tyre in the dead weight capacity that has born automobile when tire, and the space of the inner tube of a tyre can only change toward the direction that diminish, to increase the atmospheric pressure value external loading force of resisting.Promptly because after the carrying, tire deforms, and makes the space of the inner tube of a tyre reduce △ V more originally, according to the theory of gas isotherm compression, P
1V
1=(P
1+ △ P) (V
1-△ V) pressure of the pressure gas of the inner tube of a tyre has increased △ P=P again as can be known
1(△ V)/(V
1-△ V) because △ V is very little, the ■ following formula is approximately △ P=P
1(△ V)/(V
1).The variable quantity that is △ P and △ V is proportional relation basically.Also promptly and the dead weight capacity of automobile proportional.We are exactly will be by measuring the △ P that this changes with dead weight capacity, so that measure the dead weight capacity of automobile indirectly.Our method that achieves the goal that Here it is.
Chinese patent application number " 85107735 ", denomination of invention are the enforcement of " tire pressure retainer " (hereinafter to be referred as " retainer "), for enforcement of the present invention provides good enforcement basis.(the main effect of " retainer " is that the gas pressure value in the tire is remained in the setting all the time automatically.Detailed content about " retainer " please refer to its original text), this method is to realize like this, on the automobile that " retainer " is housed, because " retainer " device is drawn tire pressure, so can gang up the inner tube of a tyre space of four tires in back mutually together by " retainer ", the front two-wheeled is ganged up too mutually, and so under any circumstance the atmospheric pressure value of four trailing wheels all is the same, and the atmospheric pressure value in two front-wheels is also all the same.By the isotropic character of gas transfer pressure as can be known, each the tire pressure varies amount of ganging up mutually in the tire that causes for the variation because of dead weight capacity is also all the same, can not be subjected to the road injustice, the different influence of goods entrucking center of gravity has become two point measurements to four point measurements.For check weighing provides accurately, reliable, easy prerequisite.Then from the gas piping 1 of " retainer " ' on draw the air pressure of front and back wheel respectively, receive on the pressure transducer.When the dead weight capacity of automobile changes, the tire pressure △ P that changes with dead weight capacity will import pressure transducer into, make the vicissitudinous electric signal output of sensor.Signal adds and computing by amplifying, and gamma correction, circuit such as analog to digital conversion, decoding, demonstration show the dead weight capacity of automobile later with numeral or pointer.
Because the present invention records the dead weight capacity of automobile by measuring tire pressure indirectly with the variable quantity of dead weight capacity, has avoided the error that differs and bring to measurement result to property of load system.And because the present invention utilizes isotropic character of gas transfer pressure, four point measurements have been become two point measurements, made that carrying out check weighing on general road surface can both obtain higher degree of accuracy.Because check weighing only needs to carry out when static state, so sensor only bears the variable quantity of gas slowly when check weighing, does not impact.Sensor does not bear the impact of jolting from load system yet during automobilism.Make that like this sensor is durable in use, keep long-term stable degree of accuracy and serviceable life.For the socialization of weight sensing instrument has solved a great problem.Because above advantage makes that system of the present invention is simple and clear, reliable easily row, with low cost and more existing method for measuring weight can obtain much higher measuring accuracy.Make the socialization of weight sensing instrument become possibility.
To contrast accompanying drawing below, one embodiment of the invention will be done detailed explanation.
Among the figure: A, A ' are Bp2 type micro-pressure sensors, are used for the value that air pressure in the perception front and back wheel changes with dead weight capacity respectively, and are converted into the electric signal of direct ratio, respectively by output line 3,3 ', 4,4 ' output.5,5 ', 6,6 ' respectively be sensors A, A ' the master, pay gas and chew.The tire pressure that changes is exactly from the master, and pair gas is chewed and entered in the sensor.
1,1 ', 2,2 ' be control main, pay gas and chew the switch of gas circuit.This switch can be general valve member or solenoid valve.Can realize the full-automatic of weighing process with solenoid valve.
D is the 5G7650 chopping zero-stabilizing operational amplifier.Its input end accept from sensors A, A ' go up output line 3,3 ', the electric signal that is proportional to dead weight capacity of 4,4 ' output and with its amplification with realize adding and computing of two signals.
G is three half module number conversions of 5GM14433-1A digital voltage meter module.Its inside comprises the 5G14433 analog to digital converter, 5G4511 code translator, circuit such as LED digital indicator.Its input end is accepted the signal from 5G7650, and in the output terminal appearance is the digital quantity that is proportional to input signal.
K is a range selector.Because the 5GM14433-1A maximum can only show 1999, thus concerning dead weight capacity is the automobile of 4000kg, just must be divided into * 1 grade just can meet the demands with * 10 grades.If select four and half digital voltage meter module for use, just there is not above problem for the car below 20 tons.Whether the setting of K can be determined by the maximum displayed value of maximum capacity and module.
All the other devices can be according to the size of signal among the figure, and the model of integrated circuit waits to be chosen.This belongs to general plain general knowledge, has not just introduced one by one here.
On the automobile that " retainer " is housed, by " retainer " four trailing wheels, after the inner tube of a tyre of two front-wheels is ganged up respectively mutually, on the pipeline of ganging up with four trailing wheels on the pipeline that two front-wheels are ganged up, draw piezometric tube b, the b ' of front and back wheel respectively, so that be connected with sensors A, A '.Install sensors A, preceding pneumatic pipeline part and subsequent the electric wiring of A ' by figure.Whole check weighing system respectively and piezometric tube b, b ' connections of drawing from front and back wheel, so promptly finish the present invention then by pipe B, B '.
When automobile is unloaded, open successively switch 2,2 ', 1,1 ', allow the air pressure in the front and back wheel enter respectively in sensors A, the A '.Then switch 2,2 ' close, cut off mainly paying gas and chew 5,5 ', 6,6 ' between path.Chew 5,5 at main gas like this ' the inner front and back wheel vapour pressure value that has deposited in respectively when carload lot is zero.When the dead weight capacity of automobile increases, the tire pressure of the front and back wheel that changes with the increase of weight will import into pay gas and chew 6,6 ' in.Like this since main pay the air pressure of gas in chewing uneven and the output line 3,3 of its electric signal ', 4,4 ' on export electric signal respectively corresponding to the front and back wheel load capacity.Such two electric signal are imported the into input end a of D simultaneously, and realize adding and computing of two signals at a point, and from the output terminal output of D is these two the signal sums that have been exaggerated several times.This signal is imported again on 9,10 input pins of G, through G it is transformed into the corresponding digital amount and shows.This digital quantity is the also just in time corresponding dead weight capacity of automobile.So promptly finished the overall process of weighing carload lot.
After the weighing process finishes, switch 1,1 ' shut.Cut off the gas circuit contact of tire and measuring system.The impulsive force that can guarantee in the automobilism like this to be caused does not affact on the sensor.Guarantee the precision and the life-span of the long-term stability of sensor.
Work as the tire pressure that automobile allows front and back wheel can all be ganged up the gas circuit of six wheels in front and back.Check weighing system of the present invention can save the part on the dotted line left side among the figure after this.It is the air pressure change value that an available sensor comes six tires of perception.Make weighing system become more simple and reliable, measuring accuracy also is expected to carry De Genggao.Cost can reduce by 25～30% simultaneously.
Claims (6)
1, a kind of method of weighing carload lot is characterized in that: measure carload lot by gaseous tension in the measured automobiles tire indirectly with the atmospheric pressure value that the variation of carload lot changes.
2, a kind of being contained in is used for the instrument of measured automobiles dead weight capacity on the automobile, and this instrument is by pressure transducer A, A ', integrated operational amplifier D, digital voltage meter module G, valve member 1,1 ', 2,2 ' etc. composition.It is characterized in that: the master on pressure transducer A, the A ' pays gas and chews 5,5 ', 6,6 ' the inner tube of a tyre by pipe fitting and automobile front and back wheel is communicated with, and the pressure of automobile front and back wheel enters in sensors A, the A ' thus.
3, method according to claim 1 is characterized in that: automobile has at least the inner tube of a tyre space of two front-wheels and four trailing wheels to gang up mutually respectively, and draws piezometric tube b, b ' respectively.
4, device according to claim 2, the atmospheric pressure value that to be tire pressure change with the variation of carload lot that it is characterized in that pressure transducer A, A ' impression.
5, device according to claim 2, it is characterized in that: the master on sensors A, the A ' pays gas and chews 5,5 ', 6,6 ' between be connected to that switch 2,2 ' and 1,1 ' be used for cutting off and connect is upright pays gas and chew 5,5 ', 6,6 ' between path and the gas circuit between sensors A, A ' and the doughnut inner tube of a tyre.
6, device according to claim 2 is characterized in that, avoids sensors A, the impact when A ' bears automobilism by Shut-off fitting 2,2 ' realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86107195 CN86107195A (en) | 1986-10-10 | 1986-10-10 | The method of weighing carload lot and instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86107195 CN86107195A (en) | 1986-10-10 | 1986-10-10 | The method of weighing carload lot and instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86107195A true CN86107195A (en) | 1988-04-20 |
Family
ID=4803509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86107195 Pending CN86107195A (en) | 1986-10-10 | 1986-10-10 | The method of weighing carload lot and instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86107195A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893472A (en) * | 2010-07-08 | 2010-11-24 | 西北工业大学 | Method and device for measuring tonnage of automobile |
| CN103407335A (en) * | 2013-08-15 | 2013-11-27 | 重庆同阔科技有限公司 | Method and device for tyre load measurement and load management system |
| CN103630298A (en) * | 2013-11-07 | 2014-03-12 | 同济大学 | Dynamic identification system for automobile quality and mass center position |
| CN106768633A (en) * | 2016-12-15 | 2017-05-31 | 长江大学 | A kind of multiple-axle vehicle quality and centroid position dynamic measurement device and measuring method |
-
1986
- 1986-10-10 CN CN 86107195 patent/CN86107195A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893472A (en) * | 2010-07-08 | 2010-11-24 | 西北工业大学 | Method and device for measuring tonnage of automobile |
| CN103407335A (en) * | 2013-08-15 | 2013-11-27 | 重庆同阔科技有限公司 | Method and device for tyre load measurement and load management system |
| CN103630298A (en) * | 2013-11-07 | 2014-03-12 | 同济大学 | Dynamic identification system for automobile quality and mass center position |
| CN103630298B (en) * | 2013-11-07 | 2016-06-22 | 同济大学 | Car mass and centroid position Dynamic Identification system |
| CN106768633A (en) * | 2016-12-15 | 2017-05-31 | 长江大学 | A kind of multiple-axle vehicle quality and centroid position dynamic measurement device and measuring method |
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