CN1167941C - Vehicle load automatic monitoring and display device - Google Patents
Vehicle load automatic monitoring and display device Download PDFInfo
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- CN1167941C CN1167941C CNB021390959A CN02139095A CN1167941C CN 1167941 C CN1167941 C CN 1167941C CN B021390959 A CNB021390959 A CN B021390959A CN 02139095 A CN02139095 A CN 02139095A CN 1167941 C CN1167941 C CN 1167941C
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- load
- load sensor
- automobile
- seat
- display device
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
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- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 8
- 238000006073 displacement reaction Methods 0.000 abstract description 7
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- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
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- 230000006872 improvement Effects 0.000 description 1
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- 230000003068 static effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
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Abstract
The present invention relates to an automatic truck load monitoring and displaying device, which is an instrument displaying truck load quantity with certain quality and certain quantity. The instrument uses a sensor to automatically monitor the truck load and the corresponding displacement or analog quantity between a girder and a rear axle in the process of running and obtains the digital quantity of the truck load after A/D conversion and calibration. One path of the digital quantity is distinguished whether overloading by a circuit, and the result is displayed at the head or the tail of the truck with certain quality via optical signals; the other path of the digital quantity is displayed in a driving cab with certain quantity. The present invention causes a traffic management department to discover overloading trucks in time and accurately check the overloading quantity, and simultaneously, provides basal data such as the annual survey, the insurance, the service, the residual life estimation, the scrap, etc. for drivers according to running load conditions. The device of the present invention can be widely used for various vehicles.
Description
Technical field
The present invention relates to automobile load automatic monitoring display device, it notes down the actual load amount that comprises additional dynamic load in the driving process in real time synchronously.
Technical background
The automobile main parts size, particularly the most important foundation of stressed parts design is a nominal load capacity.The dead weight capacity of goods vehicle is a static load, but because the road surface is uneven, jolts when travelling, and the Weight Loaded of vehicle and part are conducted oneself with dignity and to be certainly led to additional shock load, makes vehicle moment might occur and significantly transships phenomenon.Therefore,, investigate its actual load and be only suitablely, could reflect the actual loading situation of vehicle exactly for the goods vehicle in travelling.Goods vehicle seriously overloads, and not only directly influences vehicle service life, and threatens traffic safety.Actual load amount when therefore accurately determining charging capacity and travelling is necessary.Can not detect, show charging capacity automatically but both still have now, can detect, show the technical equipment of the actual load amount when travelling again automatically, and, be difficult in time find overloaded vehicle yet and accurately determine overload capacity so can not accurately determine charging capacity.Can only weigh to determine the charging capacity of vehicle at present with truck scale,, therefore can't realize whenever and wherever possible the goods vehicle charging capacity is weighed because truck scale is a kind of fixation means.Generally, during the goods vehicle lade, only infer whether overload with the distortion situation of visual inspection leaf spring; When traffic safety administrative authority checks goods vehicle, also judge whether to overload with the distortion of leaf spring and what of overload capacity, this can't accurately accomplish; The initial ten thousand kilometers strokes of 1-2 of new car are running-in periods, require the actual load amount not exceed 50% of nominal load capacity, and only relying on the distortion of observing leaf spring is to meet the requirements of; Repair in the vehicle, overhaul, residual life, scrap, foundation only be distance travelled or tenure of use, and do not investigate travel conditions, and comprising factors such as travel speed, actual load amount, time corresponding length, it is objective, true that the conclusion that therefore draws is difficult to accomplish.
Summary of the invention
The objective of the invention is to overcome the deficiency that existing automobile can't provide automobile actual load amount in real time.And a kind of instrument that is used for automobile is provided, with the actual load amount (additional dynamic load that comprises the additional load that causes because of the road surface is uneven) of automobile quantitatively numeral be shown in pilothouse; With the actual load amount of goods vehicle and the comparative result of nominal load capacity,, be shown in the fixed position of the headstock or the tailstock qualitatively with the form of light signal.
Because the automobile case places on the crossbeam, crossbeam is connected with the leaf spring that is supported on back axle, during lade, the leaf spring pressurized that upwarps flattens gradually, be that crossbeam produces displacement with respect to back axle, relative position changes, and relative shift and vehicle load amount have relation one to one.Measure the displacement of crossbeam with displacement transducer,, just can obtain the vehicle load amount through A/D conversion, scale with respect to back axle; Also can determine the position relation of crossbeam, through A/D conversion, scale, obtain the vehicle load amount by position quantity with position transducer with respect to back axle; Compression spring can also be set on crossbeam, load sensor is set on back axle, compression spring often contacts (see figure 1) with load sensor, and certain pre compressed magnitude arranged, crossbeam becomes the decrement of compression spring with respect to the displacement of back axle, spring force makes load sensor produce output signal, through A/D conversion, scale, obtains the load of goods vehicle.
Sensor signal when the load of goods vehicle is reached nominal load capacity is set to the threshold value of on-off circuit.When by the vehicle actual load amount of sensor determination during greater than nominal load capacity, circuit closes, and the indication red light is bright, otherwise circuit opens, and the indication green light is bright, with the indicative light signal that obtains whether to overload.
The present invention has autonomous system of one's own, separate with the original electrical equipment of vehicle, circuit, instrument, only need during installation sensor, display, pilot lamp clamping, the corresponding site that is fixed on vehicle are got final product, do not need to change structure, shape or the size of the original member of vehicle, therefore no matter to existing vehicle, still the new vehicle in the assembling process all is easy to realize; With the actual load amount of goods stock quantitatively numeral be shown in pilothouse, be convenient to human pilot and grasp charging capacity, verify when being convenient to the law enforcement of traffic safety administrative authority simultaneously; With the actual load amount of goods vehicle and the comparative result of nominal load capacity, with the form of light signal, be shown in the fixed position of headstock, the tailstock qualitatively, the overload goods vehicle is in time found in supervision when being convenient to the law enforcement of traffic safety administrative authority.
Description of drawings
Shown in Figure 1 is the invention process schematic diagram.
Fig. 2 is the A-A state cut-open view of Fig. 1.
Shown in Figure 3 when being the invention process, the goods vehicle load is carried out the schematic diagram of scale.
Fig. 4 is the B-B state cut-open view of Fig. 3.
Shown in Figure 5 is the invention process flow chart of steps.
Embodiment
From Fig. 1, Fig. 2 as can be known: upper padding plate 5, auxilliary leaf spring 12, backing plate 6, main steel plate spring 4, lower bolster 7, be held on back axle 8 by clamping plate 9, U-shaped screw rod 11, nut 10; Load sensor 24 places down in the seat 20, and following seat 20 linings are fixed in back axle 8 with lower gasket 25 backs with screw 26, set collar 27; Pressure head 21 usefulness springs 18 are pressed on load sensor 24; The seat of honour 17 linings are fixed in crossbeam 1 with behind the Upper gasket 15 with screw 16; Add O-ring seal 19 between the seat of honour 17 and following 20; After the lead-in wire 22 of load sensor 24 is drawn, lead wire outlet 23 sealings; Electric resistance heater 14 with independent switch is fixed in crossbeam 1, and seals its coupling parts with Upper gasket 15.
From Fig. 3, Fig. 4 as can be known: substituting crossbeam 28 is only to comprise that part of crossbeam that main briquetting 2, auxilliary briquetting 3 have been installed; Substitute cross sectional shape, the size of back axle 29, identical with the retained part of U-shaped screw rod 11 on the back axle 8.Substituting back axle 29 places on the hydropress worktable 30; Special-purpose pressure head 31 is fixed in slider of hydraulic press 32, and its center is consistent with the central plane of main steel plate spring 4, auxilliary leaf spring 12, guarantees not unbalance loading.Slider of hydraulic press 32 applies power F by special-purpose pressure head 31
nThe time, measure and substitute crossbeam 28 and substitute between the back axle 29 corresponding distance L
n, again according to the physical dimension of used sensor type and vehicle, with L
nOr L
nIncrement Delta L
nScale is the load of automobile.
Below in conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, implementation method and step when describing application load sensor of the present invention in detail and measuring the goods vehicle load.
At first, calculating load by the physical dimension of goods vehicle is Q
nThe time, the counter-force F that back axle 8 supporting places are subjected to
n'.As long as the not serious unbalance loading of goods then should have F
n'=c
1Q
n, the load partition factor c that determines by the vehicle structure size in the formula
1Promptly can be considered constant, so just can obtain and Q
nCorresponding F
n' value.
Secondly, determine F by Fig. 3, test unit shown in Figure 4
n' and L
nCorresponding relation.Slider of hydraulic press 32 is exerted pressure hydraulic coupling F by special-purpose pressure head 31
nSupport the counter-force F that places are subjected to back axle 8
n' numerical value equates, can be read by the hydropress instrument.F
nChange from small to big the distance L that just can obtain to substitute crossbeam 28 according to this with respect to substituting back axle between 29
n, L
nVariation delta L
nIt is exactly the compression increment of Fig. 1 medi-spring 18.Spring 18 pressurizeds shorten, and produce spring force f
nf
n=c
2Δ L
n(c
2The stiffness coefficient of-spring 18, kgf/mm; Δ L
n-carrying capacity is Q
nThe time, the amount of being compressed of spring 18 mm) is the power that load sensor 24 bears, load sensor 24 output quantity q
nJust equal f
nSo, just can be with q
nScale is the corresponding load Q of goods vehicle
nThe sample frequency of load sensor 24 is 50-100 time/second.During practical application, owing to may there be unbalance loading, the mean value that should get the output of two side sensers is as load.When vehicle is unloaded, spring 18 existing certain pre compressed magnitudes, therefore the output with vehicle loading preload sensor 24 is made as zero point, the influence that brings with preloads such as the precompression of eliminating spring 18 and railway carriages.
Under the situation of condition permission, can direct at the scene output quantity q with load sensor 24
nScale is the load Q of goods vehicle
n(target dead weight capacity Q behind compartment 13 lades
n, and increase successively) main briquetting 2, auxilliary briquetting 3 on the crossbeam 1 press to main steel plate spring 4 and auxilliary leaf spring 12 respectively, in main steel plate spring 4 and 12 distortion of auxilliary leaf spring, relative displacements, distance L between the two take place with back axle 8 in crossbeam 1
nDiminish, spring 18 pressurizeds shorten, and produce spring force f
nEqually, f
n=c
2Δ L
n(c
2The stiffness coefficient of-spring 18, kgf/mm; Δ L
n-charging capacity is Q
nThe time, the amount of being compressed of spring 18 mm) is the power that load sensor 24 bears, load sensor 24 output quantity q
nJust equal f
nSo, just can be with q
nScale is the corresponding load Q of goods vehicle
n
The seat of honour 17, following 20 are all with the brass manufacturing, with anti-corrosion; Add O-ring seal 19 between the seat of honour 17 and following 20, lead wire outlet 23 sealings can prevent that dust, moisture, greasy dirt from too invading, and improve the working environment of load sensor 24.Load sensor 24 selection work temperature ranges big (be to the maximum-20-+100 ℃), hermetically sealed type of filling movement-less part in nitrogen, the structure, so just can not be subjected to the influence of corrosive gas, dust, moisture, can bear side load and bigger vibration, long service life, and precision long-term stability; Low excessively as environment temperature, exceed the operating temperature range that sensor allows, starting resistance well heater 14 heating separately.Electric resistance heater 14 is made the bolt form and is fixed in crossbeam 1, is convenient to change.
Implementation step process flow diagram of the present invention as shown in Figure 5.The required power supply of instrument is provided by vehicle accumulator.During vehicle loading, load sensor 24 measures substitutes crossbeam 28 and substitutes relative displacement signal between the back axle 29, and through filtering, amplification, the A/D conversion rower degree of going forward side by side obtains the digital signal of lorry loading amount.Produce during vehicle ' and jolt, certainly lead to additional dynamic load, this moment, load sensor 24 measured, and was exactly actual load amount that vehicle bears, that comprise additional dynamic load and dead weight capacity.Now, the vehicle load amount error of indication is analyzed as follows to use load sensor to be example:
The load sensor technical indicator is
Nonlinearity erron: 0.03%R.O. (the specified output of R.O.-load sensor, down together)
Hysteresis error: 0.02%R.O.
The zero point drift that temperature causes: 0.02%R.O./10 ℃
Temperature control changes: 0.02% indicating value/10 ℃
In the operating temperature range that load sensor allows (20-+100 ℃), even do not carry out temperature compensation, under extreme case, promptly-20 ℃ carry out scale, + 100 ℃ of uses, or+100 ℃ of scales ,-20 ℃ of uses, the error that causes by zero point drift and change of sensitivity: [(0.02%+0.02%) R.O./10 ℃] * 120 ℃=0.48%R.O.
Other technical indicator of setting with general requirement is
A/D conversion accuracy: 0.1%
Calibration precision: 0.5%
Therefore during the applied load sensor, vehicle load amount indicating value limiting error Δ
J%R.O.=± the 1.13%R.O. of=± (0.03+0.02+0.48+0.1+0.5), and square error is a Δ
F=± (0.03
2+ 0.02
2+ 0.48
2+ 0.1
2+ 0.5
2)
1/2=± 0.70%R.O..Situation when using other sensor is similar therewith.This shows that as non-commercial metering, with the actual load amount of sensor goods stock, even use, its degree of accuracy remains enough under least favorable, the harshest situation.
Need to prove to it will be apparent to those skilled in the art that under the prerequisite of not violating the principle of the invention and can also make some improvement and distortion that this belongs to protection scope of the present invention equally to the present invention.
Claims (4)
1. automobile load automatic monitoring display device, it comprises an automobile load digital indicator, and/or an on-off circuit and the qualitative pilot lamp of load, the load sensor signal box that the automobile load is provided; The automobile load signal that load sensor signal box provides quantitatively is shown in the load digital indicator in the pilothouse after digital conversion; And/or the load signal after digital conversion passed through on-off circuit, with the qualitative load pilot lamp that is shown in of the form of light signal, it is characterized in that load sensor signal box is to be positioned between back axle (8) and the crossbeam (1), described load sensor signal box comprises the seat of honour (17), following (20), load sensor (24), spring (18), pressure head (21), electric resistance heater (14); Load sensor (24) places down in the seat (20), and following seat (20) lining is fixed in back axle (8) with lower gasket (25) back with screw (26), set collar (27); Pressure head (21) is pressed on load sensor (24) with spring (18), and the seat of honour (17) serve as a contrast with behind the Upper gasket (15), are fixed in crossbeam (1) with screw (16), add O-ring seal (19) between the seat of honour (17) and following (20); After the lead-in wire (22) of load sensor (24) is drawn, lead wire outlet (23) sealing.
2. automobile load automatic monitoring display device according to claim 1 is characterized in that load sensor (24) selection work temperature range is-20-+100 ℃, hermetically sealed type of filling movement-less part in nitrogen, the structure.
3. automobile load automatic monitoring display device according to claim 1 and 2, the sample frequency that it is characterized in that load sensor (24) are 50-100 time/second.
4. automobile load automatic monitoring display device according to claim 1 is characterized in that the load sensor signal box of giving that described electric resistance heater (14) can start separately heats; And make the bolt form and be fixed in crossbeam (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021390959A CN1167941C (en) | 2002-09-24 | 2002-09-24 | Vehicle load automatic monitoring and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021390959A CN1167941C (en) | 2002-09-24 | 2002-09-24 | Vehicle load automatic monitoring and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1401974A CN1401974A (en) | 2003-03-12 |
| CN1167941C true CN1167941C (en) | 2004-09-22 |
Family
ID=4749890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021390959A Expired - Fee Related CN1167941C (en) | 2002-09-24 | 2002-09-24 | Vehicle load automatic monitoring and display device |
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| Country | Link |
|---|---|
| CN (1) | CN1167941C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103249896B (en) * | 2011-11-04 | 2014-12-03 | 株式会社小松制作所 | Loading systems and handlers |
| CN103697983B (en) * | 2013-12-23 | 2016-04-06 | 中航电测仪器股份有限公司 | A kind of vehicle-mounted method for processing weighing data |
| CN112964343A (en) * | 2021-02-07 | 2021-06-15 | 广东电子工业研究院有限公司 | Freight car weighing monitoring system and monitoring method thereof |
-
2002
- 2002-09-24 CN CNB021390959A patent/CN1167941C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1401974A (en) | 2003-03-12 |
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