CN1434274A - Car loading real time automatic light signal display and digital signal indicator - Google Patents
Car loading real time automatic light signal display and digital signal indicator Download PDFInfo
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- CN1434274A CN1434274A CN 03118609 CN03118609A CN1434274A CN 1434274 A CN1434274 A CN 1434274A CN 03118609 CN03118609 CN 03118609 CN 03118609 A CN03118609 A CN 03118609A CN 1434274 A CN1434274 A CN 1434274A
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Abstract
The invention refers to a real-time automatic optical signal display of the load of the automobile and the digital display unit. It has a load sensor signal generator fixed between the rear axle and the crossbeam; and a load signal processing system set in the cab and consisting of the filter, the amplifier, the A/D converter and the microcomputer; and at least two groups of load extent optical signal displays generally fixed on the headstock and the tail sock respectively, the output signal processed generated by the load sensor as the control signal.
Description
Technical field
The present invention relates to a kind of automobile load real-time automatic optical signal and show and numeric display unit, belong to the surveying instrument technical field.
Background technology
The automobile main parts size, particularly the most important foundation of stressed parts design is a nominal load capacity.The dead weight capacity of automobile is a static load, because the road surface is uneven, jolts when travelling, and the Weight Loaded of vehicle and part are conducted oneself with dignity and certainly led to the unexpected added impact load that arrives, and 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 automobile in travelling.Automobile seriously overloads, and not only directly influences vehicle service life and serious threat road traffic, bridge and personal 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't determine rational 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 lorry loading amount is weighed because truck scale is a kind of fixation means.Generally, during the lorry loading goods, only infer whether overload with the distortion situation of visual inspection leaf spring; Traffic safety administrative authority is during to vehicle inspection, also judges whether to overload with the distortion of leaf spring and what of overload capacity, and this can't accurately accomplish.
Summary of the invention
The objective of the invention is: a kind of surveying instrument that is used for automobile is provided, it is that actual load amount real-time quantitative ground numeral with automobile is shown in pilothouse, meanwhile, with the actual load amount of vehicle and the comparative result of nominal load capacity, with the form of light signal, be shown in body exterior qualitatively, generally be the fixedly full position of headstock, the tailstock.
Automobile load real-time automatic optical signal of the present invention shows and the technical scheme of numeric display unit is:
It has a quantity sensor signal generation apparatus that can be fixed between back axle and the crossbeam, it mainly is made up of load sensor and holder, is used to obtain make the load sensor output signal because of the vehicle load amount causes the relative displacement that produces between back axle and the crossbeam;
A load signal processing circuitry that can be installed in the pilothouse is arranged; This Circuits System is mainly by filtering, amplifier and A/D (analog/digital) converter and microcomputer, and the load digital indicator is formed; The load electric signal that the load sensor sends, behind filtering, amplifier, wherein one the tunnel under the synchronizing clock signals control that microcomputer internal clock driver sends, by A/D (analog/digital) converter the load electrical signal conversion is become digital signal, and depositing microcomputer in, the load digital quantity signal in the described microcomputer send digital indicator to show; Load of machinery systems light signal display is delivered on another road behind comparison, on-off circuit;
Have at least two groups can be fixed on the vehicle body, generally be the load of machinery systems light signal display that is separately fixed at headstock, the tailstock, mainly be made up of a red light and a green light for every group, its control signal is the load electric signal that sent by the load sensor output signal after through filtering, amplifier and comparison, on-off circuit.
Ultimate principle of the present invention and technique effect are:
Because railway carriage 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.When using such class sensor: the sensor (comprising load sensor and pressure transducer) that promptly measures the increment that crossbeam and back axle relative shift or position quantity change when causing the stressed change of sensor, its output signal produces, or use another kind of sensor: promptly directly measure the sensor (comprising displacement transducer, position and range sensor) of relative shift or position quantity, so can obtain the analog quantity of automobile load.(see figure 1) with regard to the preferred embodiment that load sensor 11 is to use the load sensor in the load sensor, it is that compression spring is set on crossbeam, load sensor is set on back axle, compression spring often contacts with load sensor, and certain pre compressed magnitude arranged, and crossbeam becomes the compression increment of compression spring with respect to the displacement of back axle, and spring force makes load sensor produce output signal, through A/D conversion, scale, obtain the load of automobile.Situation during the working pressure sensor is identical during with the applied load sensor.Also can measure the displacement of crossbeam,, just can obtain the vehicle load amount through A/D conversion, scale with displacement transducer with respect to back axle; Can also determine the position relation of crossbeam with position and range sensor, through A/D conversion, scale, obtain the vehicle load amount by position quantity with respect to back axle.
Load of machinery systems light signal shows it is that sensor signal is introduced comparator circuit, and the sensor signal of automobile load when reaching 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, comparator circuit triggers and makes on-off circuit be in " opening " state, and the indication red light is bright; Otherwise on-off circuit is in " pass " state, and the indication green light is bright, shows with the light signal that obtains whether to overload;
Measure (see figure 1) in the preferred embodiment of automobile load, (nominal titre Q behind the compartment lade at load sensor 11 applied load sensors of the present invention
n, and increase successively), between crossbeam 2 and the back axle 13 relative displacement takes place, distance L between the two
nDiminish, spring 7 pressurizeds shorten, and produce spring force f
n:
f
n＝c
1ΔL
n
C in the formula
1The stiffness coefficient of-spring 7, kgf/mm;
Δ L
n-charging capacity is Q
nThe time, the amount of being compressed of spring 7, mm.
The spring force f that spring 7 produces
nBe the power that load sensor bears, the simulating signal of load sensor output is q after A/D (analog/digital) conversion
n, q
nJust equal f
nSo, just can be with a series of output quantity q of load sensor
nScale is the load Q of vehicle correspondence
n
Automobile load real-time automatic optical signal of the present invention shows and numeric display unit is an instrument and equipment that 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 vehicle 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 automobile and the comparative result of nominal load capacity, be shown in the fixed position of headstock, the tailstock qualitatively with the form of light signal, overloaded vehicle is in time found in supervision when being convenient to the law enforcement of traffic safety administrative authority.
Description of drawings
Fig. 1 is load sensor signal generating means 1 and the installation site synoptic diagram thereof among the present invention, and among the figure, load sensor 11 is a load sensor;
Fig. 2 is the basic block diagram of the signal processing system among the present invention;
Fig. 3 is that load of machinery systems light signal display 19 is installed on the headstock part synoptic diagram;
Fig. 4 is that load of machinery systems light signal display 19 is installed on tailstock position synoptic diagram;
Fig. 5 is signal processing system is installed on pilothouse with integrated box 28 ' a synoptic diagram.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples:
Shown in Fig. 1-5, be that automobile load real-time automatic optical signal of the present invention shows and an embodiment of numeric display unit that its concrete technical scheme is:
1), it has a load sensor signal generating means 1, can be fixed between back axle 13 and the crossbeam 2, form by load sensor 11 and holder, load sensor 11 wherein is can measure crossbeam 2 to cause the stressed change of sensor with back axle 13 relative shifts or position quantity change, make the sensor of the increment of sensor output signal generation, the sensor of such increment is a load sensor, or pressure transducer, present embodiment is the load sensor (as shown in Figure 1) that is selected from the load sensor, is installed on by in the seat of honour 6 and following 10 holder of forming; The seat of honour 6 is that a tubular has end cover with following 10, on the two movable surface of contact O-ring seal 8 is arranged, and anti-sealing and dust etc. enter, and also can not establish O-ring seal; One pressure head 9 is arranged on the load sensor, and what make that the two is in contact condition all the time is the spring 7 with certain pre compressed magnitude; Connect one on the seat of honour 6 and have the electric resistance heater that can regulate temperature 3 that independent switch is controlled; Load sensor signal generating means 1 is used for obtaining causing that because of the vehicle load amount producing relative displacement between back axle 13 and the crossbeam 2 makes the load sensor output signal; The seat of honour 6 generally also is fixed on the crossbeam 2 with screw 5 behind the above pad 4 of lining, and following seat 10 linings are fixed on the back axle 13 with set collar 14, screw 15 with underlay 12 backs; Electric resistance heater 3 is made the bolt form and is fixed on the seat of honour 6, and has independently switch; Do not have heater element in the vehicle load quantity sensor signal generation apparatus 1 during work, so environment temperature can not exceed the maximum operating temperature (operating temperature range that load sensor allows for-20-+100 ° C) of load sensor, not need cooling provision; Environment temperature as vehicle load amount transducing signal generating means 1 is low excessively, is lower than the minimum operating temperature that load sensor allows, but 3 heating of starting resistance well heater;
2), a load signal disposal system 28 is arranged, be installed in the pilothouse by an integrated box 28 '; This signal processing system is mainly by filtering, amplifier 16 and A/D (analog/digital) converter 17 and microcomputer 22, and load digital indicator 23 is formed; The load electric signal that load sensor 11 sends, behind filtering, amplifier 16, wherein one the tunnel under the synchronizing clock signals control that microcomputer 22 internal clock drivers send, and by A/D converter 17 the load electrical signal conversion is become digital signal, and deposit microcomputer 22 in; Load digital signal in the described microcomputer 22 send digital indicator 23 to show; Load of machinery systems light signal display 19 is delivered on another road behind comparison, on-off circuit 18;
3), two groups of load of machinery systems light signal displays 19 are arranged, form by a red light (19a) and a green light (19b) for every group, can be separately fixed at headstock, the tailstock, can also be installed in the vehicle body both sides, its control signal is the output signal of the load electric signal that sends of above-mentioned load sensor 11 after through filtering, amplifier 16 and comparison, on-off circuit 18;
In the foregoing description, the operating temperature range of load sensor is-20～100 ℃, and the error that zero point drift and change of sensitivity cause is 0.45%R.O (R.O is the specified output of load sensor), and temperature control is changed to 0.02% indicating value/10 ℃; The A/D conversion accuracy is 0.1%, and spending precision surely is 0.5%; The sample frequency scope of A/D converter 17 is 50-100 time/second.
Automobile load real-time automatic optical signal of the present invention shows with other embodiment of numeric display unit, load sensor 11 is for directly measuring the sensor of crossbeam 2 and back axle 13 relative shifts or position quantity, the sensor of such displacement or position quantity is displacement transducer or position and range sensor, is installed on mainly by in the seat of honour (6) and following 10 holder of forming.
Among Fig. 1, when vehicle is unloaded, spring 7 existing certain pre compressed magnitudes, therefore the output with vehicle loading preload sensor is made as zero point, the influence that brings with preloads such as the precompression of eliminating spring 7 and railway carriages.
Below further be example, explain as follows the vehicle load amount error of indication with the preferred embodiment of using load sensor monitor vehicle load:
The load sensor technical indicator is:
Nonlinearity erron is 0.03%R.O. (the specified output of R.O.-load sensor, down together);
Hysteresis error is 0.02%R.O;
The zero point drift that temperature causes is 0.02%R.O./10 ℃;
Temperature control is changed to 0.02% indicating value/10 ℃;
In the operating temperature range that load sensor allows (20-+100 ℃), if do not carry out temperature compensation, under extreme case, promptly-20 ℃ fixed degree ,+100 ℃ of uses, or+100 ℃ of degree ,-20 ℃ of uses calmly, the error that is caused by zero point drift and change of sensitivity is:
[(0.02％+0.02％)R.O./10℃]×120℃＝0.48％R.O.
General other technical indicator that requires to set is:
The A/D conversion accuracy is 0.1%;
Surely spending precision is 0.5%.
Therefore, during the applied load sensor, vehicle load amount indicating value limiting error is:
±(0.03+0.02+0.48+0.1+0.5)％R.O.＝±1.13％R.O；
And square error is: ± 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 detected vehicle, even use, its degree of accuracy remains enough under least favorable, the harshest situation.
Claims (5)
1. automobile load real-time automatic optical signal shows and numeric display unit, it is characterized in that it has:
The load sensor signal generating means (1) that can be fixed between back axle (13) and the crossbeam (2), it mainly is made up of load sensor (11) and holder, is used for obtaining making load sensor ((11) output signal because of the vehicle load amount causes the displacement that produces between back axle (13) and the crossbeam (2);
The load signal processing system (28) that can be installed in the pilothouse, it is mainly by filtering, amplifier (16) and A/D (analog/digital) converter (17) and microcomputer (22), and load digital indicator (23) is formed; The load electric signal that load sensor (11) sends, behind filtering, amplifier (16), wherein one the tunnel under the synchronizing clock signals control that microcomputer (22) internal clock driver sends, by A/D (analog/digital) converter (17) the load electrical signal conversion is become digital signal, and depositing microcomputer (22) in, the load digital signal in the described microcomputer (22) send digital indicator (23) to show; Load of machinery systems light signal display (19) is delivered in another road behind comparison, on-off circuit (18);
Have at least two groups can be fixed on the vehicle body, generally be the load of machinery systems light signal display (19) that is separately fixed at headstock, the tailstock, mainly be made up of a red light (19a) and a green light (19b) for every group, its control signal is the load electric signal that sent by load sensor (11) output signal after through filtering, amplifier (16) and comparison, on-off circuit (18).
2, device according to claim 1, it is characterized in that, load sensor (11) is can measure crossbeam (2) to cause the stressed change of sensor with back axle (13) relative shift or position quantity change, make the sensor of the increment of sensor output signal generation, the sensor of such increment is a load sensor, or pressure transducer; Be installed on mainly by in the seat of honour (6) and following the holder that (10) are formed.
3, device according to claim 2 is characterized in that, load sensor (11) is the load sensor that is selected from load sensor one class, is installed on mainly by in the seat of honour (6) and following the holder that (10) are formed; On the seat of honour (6) and following (10) active face O-ring seal (8) can be arranged; On this load sensor (11) pressure head (9) is arranged, what make that the two is in contact condition all the time is one to have the spring (7) of certain pre compressed magnitude; The electric resistance heater that can regulate temperature (3) that connection one has independent switch control is gone up at the seat of honour (6).
4, device according to claim 1, it is characterized in that, load sensor (11) is for directly measuring the sensor of crossbeam (2) and back axle (13) relative shift or position quantity, the sensor of such displacement or position quantity is displacement transducer or position and range sensor, is installed on mainly by in the seat of honour (6) and following the holder that (10) are formed.
According to claim 1 or 2 or 3 or 4 described devices, it is characterized in that 5, the sample frequency scope of A/D converter (17) is 50-100 time/second.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03118609 CN1434274A (en) | 2003-02-18 | 2003-02-18 | Car loading real time automatic light signal display and digital signal indicator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03118609 CN1434274A (en) | 2003-02-18 | 2003-02-18 | Car loading real time automatic light signal display and digital signal indicator |
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| CN 03118609 Pending CN1434274A (en) | 2003-02-18 | 2003-02-18 | Car loading real time automatic light signal display and digital signal indicator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482903A (en) * | 2014-12-30 | 2015-04-01 | 重庆长安汽车股份有限公司 | Device for measuring seat submergence displacement in crash test |
| CN113758550A (en) * | 2021-09-08 | 2021-12-07 | 山东理工大学 | Semitrailer vehicle-mounted weighing device based on intermediary strain measurement |
-
2003
- 2003-02-18 CN CN 03118609 patent/CN1434274A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482903A (en) * | 2014-12-30 | 2015-04-01 | 重庆长安汽车股份有限公司 | Device for measuring seat submergence displacement in crash test |
| CN113758550A (en) * | 2021-09-08 | 2021-12-07 | 山东理工大学 | Semitrailer vehicle-mounted weighing device based on intermediary strain measurement |
| CN113758550B (en) * | 2021-09-08 | 2024-04-19 | 山东理工大学 | On-vehicle weighing device of semitrailer based on intermediary strain measurement |
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