CN104502014A - Rack-based braking force detection device and method capable of automatically adjusting automobile axle load - Google Patents
Rack-based braking force detection device and method capable of automatically adjusting automobile axle load Download PDFInfo
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- CN104502014A CN104502014A CN201410783695.5A CN201410783695A CN104502014A CN 104502014 A CN104502014 A CN 104502014A CN 201410783695 A CN201410783695 A CN 201410783695A CN 104502014 A CN104502014 A CN 104502014A
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Abstract
The invention belongs to the technical field of detection methods of automobile brake performance, and particularly relates to a rack-based braking force detection device and a rack-based braking force detection method capable of automatically adjusting automobile axle load. The rack-based braking force detection device capable of automatically adjusting automobile axle load includes an automobile axle load brake test bed, two same lifting platforms, a data collecting and processing system and a control system, wherein the two same lifting platforms are uniformly positioned on the front and rear sides of the automobile axle load brake test bed. The rack-based braking force detection method capable of automatically adjusting automobile axle load includes the following steps of 1, setting devices in the data collecting and processing system to be zero, and collecting axle load and braking force signals; 2, automatically adjusting the heights of undetected wheels on the lifting platforms; 3, detecting the braking force of a measured axle of a vehicle. According to the rack-based braking force detection device and method capable of automatically adjusting automobile axle load, the heights of the lifting platforms of the automobile axle load brake test bed are automatically adjusted, so that the braking effect of the vehicle on an actual level road can be truly simulated on the automobile axle load brake test bed, and the braking performance of the vehicle can be accurately detected.
Description
Technical field
The invention belongs to Examining Method of Automobile Brake Capability technical field, be specifically related to the self-adjusting braking-force detecting device of a kind of automobile axle load based on stand and method.
Background technology
Existing automobile brake perfrmance detects, and automobile reaches automobile axle load brake tester and carries out braking performance test after weighing on the counterweight table of ground.Required braking force is checked by GB GB7258-2012 " motor vehicle safe and technical specification ", the number percent of front axle braking force and front axle load requires to be more than or equal to 60%, and definition: the axle before motor vehicle bicycle longitudinal centre line center is front axle, and other axles are rear axle; All axletrees of trailer are all pressed rear axle and are calculated; So double steering shaft is all front axle, braking ratio per axle all requires to be more than or equal to 60%, and the braking ratio per axle of all axletrees of trailer all requires to be more than or equal to 50%, and car load braking ratio requires to be more than or equal to 60%.But test shows: can be maked somebody a mere figurehead by the first steering axle and the 3rd shaft portion when the second steering axle of double steering shaft vehicle detects, greatly reduce adhesion weight, be difficult to the testing requirement meeting front axle 60% braking ratio.
Trailer, under detected state pulled by tractor, is maked somebody a mere figurehead by shaft portion before the second axle and tractor during trailer the 3rd shaft detection equally, is not only difficult to the testing requirement reaching 50% braking ratio per axle, is also difficult to the testing requirement reaching 60% car load braking ratio.Even if the braking ability of vehicle is fine, adhesion weight reduces detection maximum braking force is reduced, and reduces to be difficult to up to standard, cause false retrieval to misjudge with the braking ratio per axle of the ratio that ground counterweight table weighs.
For above problem, existing technology is: 1, by Loading Method, gains in weight or adds pulling force to increase the adhesion weight of wheel to cylinder, the operability extreme difference of this method to vehicle plus-pressure or to institute's measuring car axle.2, detect multiple-axle vehicle, complex structure after adopting actuating unit lifting automobile shaft weight brake testing table, price is high, troublesome poeration.3, detect weighing and brake on two-in-one composite bench, the adhesion weight reduced and detection damping force, although the braking ratio per axle that can meet multiaxle trucks detects, but owing to substantially reducing axle weight and complete vehicle weight and damping force, virtually greatly reducing the braking ability requirement of vehicle, is nonstandard detection.
Summary of the invention
Fundamental purpose of the present invention is to provide the self-adjusting braking-force detecting device of a kind of automobile axle load based on stand and method, according to the axle load allocation proportion of each axle of multiple-axle vehicle, the height of automatic adjustment lifting table lifting platen, the braking effect of real simulation vehicle on real standard road surface on automobile axle load brake tester, thus detect vehicle braking performances exactly.
Above-mentioned purpose of the present invention is achieved through the following technical solutions, and accompanying drawings is as follows:
The self-adjusting braking-force detecting device of a kind of automobile axle load based on stand, comprise automobile axle load brake tester 30, lifting table 3, data acquisition processing system and control system, described lifting table 3 is provided with identical two, described identical two are respectively front side lifting table 35 and rear side lifting table 36, described front side lifting table 35 and rear side lifting table 36 is uniform is positioned at both sides before and after automobile axle load brake tester 30, every platform lifting table comprises lifting table lifting device and ground;
Every platform lifting table refers to arbitrary in front side lifting table 35 and rear side lifting table 36, and front side lifting table 35 and rear side lifting table 36 arrange identical.
Described lifting table lifting device comprises hang plate 24, lifting platen 23, axle weight sensor 27, lifting support joist steel 18, air bag 28 and riser guide 22;
Described ground is made up of front side ground 20 and rear side ground 34, and described front side ground 20 and described rear side ground 34 are symmetrical arranged, and are all provided with ground dip plane 33;
Described lifting platen 23 is connected by jointed shaft 21 with the hang plate 24 of both sides, and described hang plate 24 is provided with hang plate web wheel 29 near the bottom, one end of ground dip plane 33, and described ground dip plane 33 is by hang plate web wheel 29 support inclined plates 24;
Described lifting platen 23 is fixed on rectangle steel framework 26, the upper surface of described axle weight sensor 27 is fixedly connected with rectangle steel framework 26, lower surface and the described lifting of described axle weight sensor 27 support joist steel 18 and are fixedly connected with, described air bag 28 is fixed on the base of every platform lifting table, upper surface and the lifting of described air bag 28 support joist steel 18 and contact, and described riser guide 22 is fixed on the base both sides of every platform lifting table; Described lifting supports joist steel 18 and moves up and down along riser guide 22;
Described data acquisition processing system comprises Signal-regulated kinase 8, analog quantity terminal block 9, analog acquisition card 14 and industrial computer 16;
Described analog acquisition card 14 is connected with analog quantity terminal block 9; Described analog quantity terminal block 9 is connected with Signal-regulated kinase 8; Described Signal-regulated kinase 8 is connected with the braking force sensor on the axle weight sensor 27 on described lifting table 3, the axle weight sensor on automobile axle load brake tester 30, automobile axle load brake tester 30 respectively;
Described control system comprises digital output card 1 and solenoid valve 2; Described digital output card 1 is connected with solenoid valve 2, and described solenoid valve 2 is connected with air bag 28.
Front side described in the technical scheme longitudinal centre line of lifting table 35, the longitudinal centre line of rear side lifting table 36 and automobile axle load brake tester 30 longitudinal centre line overlap, the cross central line of the front side cross central line of lifting table 35, the cross central line of rear side lifting table 36 and automobile axle load brake tester 30 is parallel to each other, and described automobile axle load brake tester 30 cross central line is 1350mm to the distance of front side lift master 35 and rear side lift master 36.
Hang plate 24 described in technical scheme is provided with 8 pieces, every platform lifting table has 4 blocks of hang plates 24; The length of described hang plate 24 is identical with the length of lifting platen 23;
Described hang plate 24 lower surface fixes 3 blocks of hang plate channel-section steels 25, and the attachment coefficient of the upper plane of described hang plate 24 and the upper plane of lifting platen 23 is all more than 0.1.
The platen of lifting described in technical scheme 23 is provided with 4 pieces, and every platform lifting table is provided with 2 blocks of lifting platens 23;
The length of described lifting platen 23 is identical with the length of the cylinder above automobile axle load brake tester 30;
Described axle weight sensor 27 is provided with 8, and every platform lifting table is provided with 4, each maximum 4000kg that weighs.
Air bag 28 described in technical scheme is provided with 8, and every platform lifting table is provided with 4;
Described riser guide 22 is provided with 4, and every platform lifting table is provided with 2.
The pitch angle of the dip plane of ground described in technical scheme 33 is 45 degree, and ending vertical face, ground dip plane 32 is highly 36 to 38mm.
Lifting described in technical scheme supports on joist steel 18 and is fixed with the spacing wing 17 of lifting; Every platform lifting table base is fixed with the spacing door 19 of lifting, is elevated spacing wing 17 and moves up and down along riser guide 22 in the space that the spacing door 19 of lifting limits with lifting support joist steel 18.
Be elevated spacing wing 17 described in technical scheme and be provided with 4, every platform lifting table is provided with 2;
The spacing door 19 of described lifting is provided with 4, and every platform lifting table is provided with 2.
The card of digital output described in technical scheme 1, analog acquisition card 14 are all arranged in industrial computer 16ISA slot, and described industrial computer 16, analog quantity terminal block 9 and Signal-regulated kinase 8 are all established and be placed in switch board 31.
By a detection method for the self-adjusting braking-force detecting device of the automobile axle load based on stand according to claim 1, comprise following concrete steps:
Step 1: by the equipment zeroing in data acquisition processing system, collection axle is heavy, braking force signal;
A), before vehicle enters and detects place, heavy for axle that is heavy for axle that is heavy for the axle of described front side lifting table 35, rear side lifting table 36 and described automobile axle load brake tester 30 and damping force are set to zero by data acquisition processing system;
B) after vehicle enters and detects place, dot matrix display screen 15 points out vehicle detection axle to sail automobile axle load brake tester 30 into, when detecting axletree and being on automobile axle load brake tester 30, the non-detection axis of rear adjacent is just on described rear side lifting table 36, non-detection axis adjacent above is just on described front side lifting table 35, now the proximity switch received on automobile axle load testing table 30 is detected that vehicle institute measuring car axle arrives the signal of automobile axle load brake tester 30 by industrial computer 16, pass through data acquisition processing system again, the non-measured axle axle weight of record now on front side lifting table 35, measurement axle axle weight on the heavy and automobile axle load brake tester 30 of non-measured axle axle on rear side lifting table 36.
Step 2: the height automatically regulating non-detection wheel on lifting table;
Multiple-axle vehicle enters automobile axle load brake tester 30, industrial computer 16 detects vehicle non-measured axle and measures axle axle weight, according to the axle load allocation proportion of each axle of multiple-axle vehicle, industrial computer 16 realizes inflating air bag 28 or exitting by control system Controlling solenoid valve 2, controls the height of described front side lifting table 35 and rear side lifting table 36; In the process, data acquisition processing system detects the axle weight measuring axle and non-measured axle in real time, until non-measured axle and measurement axle axle weigh, the axle load allocation proportion of each axle of multiple-axle vehicle, simulates the braking effect on real standard road surface, the damping force of vehicle detected.
Step 3: detect vehicle and measure axle braking force;
A) after automatically regulating the height of described front side lifting table 35 and rear side lifting table 36, driver is pointed out to brake by dot matrix display screen 15, gather the braking force signal that automobile axle load brake tester 30 braking force sensor produces, and be sent to data acquisition processing system, calculate damping force now;
B) vehicle is completely static, and dot matrix display screen 15 shows vehicle and measures axle left wheel brake power 12 and measure axle left wheel brake power 13, and the curve of the heavy and braking force signal of axle variation relation in time appears in the display interfaces of industrial computer 16.
Technique effect of the present invention:
1, lifting table lifting device of the present invention can combine with automotive wheel well, and after airbag aeration, lifting table rises and hang plate, lifting platen, front side ground and rear side ground can be made to form plane, is convenient to vehicle and travels; After air bag deflation, lifting table declines and hang plate, lifting platen, front side ground and rear side ground just can be made to form dovetail groove, has both saved material and space and has also contributed to the stable of wheel.
2, the axle that the present invention gathers according to data acquisition processing system weighs, braking force signal, according to the axle load allocation proportion of each axle of multiple-axle vehicle, industrial computer controls the height of lifting table automatically by control system, realize the braking effect of real simulation vehicle on real standard road surface on automobile axle load brake tester, thus detect vehicle braking performances quickly and accurately.
3, the present invention starts with from the heavy angle of axle, solve because each axle wheel of multiple-axle vehicle is in ground and the distortion on automobile axle load brake tester well, and variously calculate on ground with at automobile axle load brake tester rigid contact the error problem caused by each axle wheel, make experiment more accurate, convenience of calculation.
4, the inventive method is simple to operate, is easy to safeguard, can be conveniently used in vehicle testing line, and can examinations effectively.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated:
Fig. 1 is Automobile Braking Force Detecting schematic diagram;
Fig. 2 a is the longitudinal side view of lifting table decline state;
Fig. 2 b is the horizontal front view of lifting table decline state;
Fig. 3 a is the longitudinal side view of lifting table raised configuration;
Fig. 3 b is the horizontal front view of lifting table propradation;
Fig. 4 is equipment installation site layout;
Fig. 5 is lifting table foundation drawing;
Fig. 6 a is raising board front view;
Fig. 6 b is raising board side view;
Fig. 7 a is hang plate front view;
Fig. 7 b is hang plate side view;
In figure: 1---digital output card
2---solenoid valve
3---lifting table
4---the right wheel load of non-measured axle
5---non-measured axle revolver load
6---the right wheel load of wheel weighing instrument
7---wheel weighing instrument revolver load
8---Signal-regulated kinase
9---analog quantity terminal block
10---measure axle revolver load
11---measure the right wheel load of axle
12---measure axle left wheel brake power
13---measure that axle is right takes turns damping force
14---analog acquisition card
15---dot matrix display screen
16---industrial computer
17---be elevated spacing wing
18---lifting supports joist steel
19---be elevated spacing door
20---front side ground
21---jointed shaft
22---riser guide
23---lifting platen
24---hang plate
25---hang plate channel-section steel
26---rectangle steel framework
27---axle weight sensor
28---air bag
29---hang plate web wheel
30---automobile axle load brake tester
31---switch board
32---ending vertical face, ground dip plane
33---ground dip plane
34---rear side ground
35---front side lifting table
36---rear side lifting table
Embodiment
Concrete device embodiments of the present invention is further described below in conjunction with accompanying drawing illustrated embodiment.
The self-adjusting braking-force detecting device of automobile axle load based on stand, comprise automobile axle load brake tester 30, uniformly be positioned at two of both sides before and after automobile axle load brake tester 30 identical lifting table 3, data acquisition processing system and control system, the every platform lifting table in described lifting table 3 includes lifting table lifting device, ground.
Described lifting table lifting device comprises hang plate 24, jointed shaft 21, lifting platen 23, and axle weight sensor 27, rectangle steel framework 26, lifting support joist steel 18, air bag 28, riser guide 22, be elevated spacing wing 17 and be elevated spacing door 19.Consult Fig. 2 a and 2b and Fig. 3 a and Fig. 3 b, before and after lifting platen 23, both sides are connected with the hang plate 24 of both sides by jointed shaft 21, ground dip plane 33 supports hang plate 24 by hang plate web wheel 29 of the other end of hang plate 24, two surfaces up and down of axle weight sensor 27 support joist steel 18 with rectangle steel framework 26 and lifting respectively and are connected, lifting supports joist steel 18 and is connected with air bag 28, rectangle steel framework 26 is connected with lifting platen 23, being elevated spacing wing 17 is bolted on lifting support joist steel 18, being elevated spacing door 19 is welded on lifting table base, riser guide 22 is also welded on lifting table base, be elevated spacing wing 17 to move up and down along riser guide 22 in the space that the spacing door 19 of lifting limits with lifting support joist steel 18.
Data acquisition processing system comprises Signal-regulated kinase 8, analog quantity terminal block 9, analog acquisition card 14 and industrial computer 16.Consult Fig. 1, Signal-regulated kinase 8 is connected with axle weight sensor, braking force sensor on automobile axle load brake tester 30 with the axle weight sensor 27 on lifting table 3, analog quantity terminal block 9 is connected with Signal-regulated kinase 8, analog acquisition card 14 is connected with analog quantity terminal block 9 by winding displacement, and analog acquisition card 14 is arranged in industrial computer 16ISA slot, and industrial computer 16, analog quantity terminal block 9 and Signal-regulated kinase 8 are placed in switch board 31.
Control system comprises digital output card 1 and solenoid valve 2.Consult Fig. 1, digital output card 1 is arranged in industrial computer 16ISA slot, and is connected with solenoid valve 2, and solenoid valve 2 is connected with lifting table 3.
Lifting table 3 totally two: front side lifting table 35 and rear side lifting table 36, the longitudinal centre line of front side lifting table 35, longitudinal centre line and automobile axle load brake tester 30 longitudinal centre line of rear side lifting table 36 overlap, the cross central line of front side lifting table 35, the rear side cross central line of lifting table 36 and the cross central line of automobile axle load brake tester 30 are parallel to each other, front side lifting table 35 and rear side lifting table 36 is uniform is positioned at both sides before and after automobile axle load brake tester 30, described automobile axle load brake tester 30 cross central line is 1350mm to the distance of front side lift master 35 and rear side lift master 36.
Hang plate 24 totally 8 pieces, every platform lifting table has 4 blocks of hang plates 24.Its length is identical with the length of lifting platen 23, in order to increase the intensity of hang plate 24,3 blocks of hang plate channel-section steels 25 are welded below every block hang plate 24, move on ground dip plane 33 for convenience of hang plate 24, settle hang plate wheel 29 at every block hang plate channel-section steel 25 near one end of ground dip plane 33, and the attachment coefficient of the upper plane of hang plate 24 and the upper plane of lifting platen 23 is respectively all more than 0.1.
Totally 8, air bag 28, every platform lifting table has 4, and air bag 28, below by being bolted on base, supporting joist steel 18 with lifting above and contacts, and supports this lifting support joist steel 18.
Be elevated spacing wing 17 totally 4, every platform lifting table has 2.Be elevated totally 4, spacing door 19, every platform lifting table has 2.Riser guide 22 totally 4, every platform lifting table has 2.Air bag 28 is initially in contraction state, in the process that air bag 28 is inflated, lifting supports each parts such as joist steel 18 and all can move upward along riser guide 22, when being raised to certain altitude, lifting supports the spacing wing of lifting 17 fixing on joist steel 18 can be subject to the restriction being elevated spacing door 19, and then is raised to most high state, when exitting to air bag 28, lifting supports each parts such as joist steel 18 and all can move downward along riser guide 22, until air bag 28 contraction state.
Lifting platen 23 totally 4 pieces, every platform lifting table has 2 blocks of lifting platens 23.Its length is identical with the length of the cylinder above automobile axle load brake tester 30, in order to increase the intensity of lifting platen 23, settles one and lifting platen 23 rectangle steel framework 26 of the same size at lifting platen 23 lower surface.Axle weight sensor 27 totally 8, every platform lifting table has 4, each maximum 4000kg that weighs.
The front side ground 20 of every platform lifting table is identical with rear side ground 34, and the pitch angle of ground dip plane 33 is 45 degree, and ending vertical face, ground dip plane 32 is highly 36 to 38mm.
For a detection method for the self-adjusting braking-force detecting device of the above-mentioned automobile axle load based on stand, comprise following concrete steps:
The present invention uses LZ-1000 type wheel weighing instrument, for the axle load of measuring vehicle, determines the axle load allocation proportion of each axle of multiple-axle vehicle further.The present invention also uses the automobile axle load brake tester of HZ-1302 model, Y-axis weight sensor wherein and left and right braking force sensor signal can be obtained, measuring axle revolver load for obtaining multiple-axle vehicle, measuring the right wheel load of axle, measure axle left wheel brake power and measure that axle is right takes turns damping force.
1, the equipment zeroing in data acquisition processing system, collection axle is heavy, braking force signal
When vehicle enters before detection place, now data acquisition processing system can by the axle weight of front side lifting table 35 now, the axle of rear side lifting table 36 is heavy and axle that is automobile axle load brake tester 30 is heavy and damping force is set to zero, after vehicle enters detection place, dot matrix display screen 15 points out vehicle detection axle to sail automobile axle load brake tester 30 into, when detecting axletree and being on automobile axle load brake tester 30, just be on rear side lifting table 36 with the non-detection axis of detection axis rear adjacent, just be on the lifting table 35 of front side with non-detection axis adjacent before detection axis, now the proximity switch received on automobile axle load testing table 30 is detected that vehicle institute measuring car axle arrives the signal of automobile axle load brake tester 30 by industrial computer 16, pass through data acquisition processing system again, the non-measured axle axle weight of record now on front side lifting table 35, measurement axle axle weight on the heavy and automobile axle load brake tester 30 of non-measured axle axle on rear side lifting table 36.
2, the height of non-detection wheel on lifting table is automatically regulated
After multiple-axle vehicle enters automobile axle load brake tester 30, industrial computer 16 detects vehicle non-measured axle and measures axle axle weight, by the axle load allocation proportion according to each axle of multiple-axle vehicle, industrial computer 16 realizes inflating air bag 28 or exitting by control system Controlling solenoid valve 2, and then controls the height of front side lifting table 35 and rear side lifting table 36; In the process, data acquisition processing system measures the axle weight of axle and non-measured axle by detecting in real time, the axle load allocation proportion of each axle of multiple-axle vehicle until non-measured axle and measurement axle axle weigh, thus the braking effect of simulating really on real standard road surface, the damping force of vehicle detected accurately.
3, the detection of axle braking force measured by vehicle
After highly automated adjustment on lifting table 3 completes, braked by the prompting driver of dot matrix display screen 15, now automobile axle load brake tester 30 braking force sensor is sent to data acquisition processing system, calculates damping force now; After vehicle is completely static, dot matrix display screen 15 will show vehicle and measure axle left wheel brake power 12 and measure axle left wheel brake power 13, and the curve of the heavy and braking force signal of axle variation relation in time appears in the display interfaces of industrial computer 16.
The present invention with the trailer of four axles for instantiation, to the analytic explanation that vehicle the 3rd shaft detection is correlated with.The present invention uses the wheel weighing instrument of LZ-1000 model, for the axle load of measuring vehicle, determines the axle load allocation proportion of each axle of multiple-axle vehicle further.The present invention also uses the automobile axle load brake tester 30 of HZ-1302 model, Y-axis weight sensor wherein and left and right braking force sensor signal can be obtained, measuring axle revolver load for obtaining multiple-axle vehicle, measuring the right wheel load of axle, measure axle left wheel brake power and measure that axle is right takes turns damping force.
Because each axle load allocation proportion of four axle trailers is due to vehicle difference, concrete axle load allocation proportion is also different, and general first axle and the second axle are non-floating axle axle, and diaxon axle load is different, and the 3rd axle and the 4th axle are floating axle axle, and diaxon axle load is identical.
The self-adjusting braking-force detecting device of automobile axle load based on stand, comprises lifting table lifting device, data acquisition processing system and control system.Vehicle driver operates according to the prompting of dot matrix display screen 15, starting dot matrix display screen 15 points out vehicle the 3rd axle to enter automobile axle load brake tester 30, now data acquisition processing system can be set to zero to the measurement axle revolver load 10 on the right wheel load of non-measured axle 4 on rear side lifting table 36, non-measured axle revolver load 5 and automobile axle load brake tester 30, the right wheel load of measurement axle 11, measurement axle left wheel brake power 12 and the right damping force 13 of taking turns of measurement axle, and now front side lifting table 35 is raised configuration, facilitates vehicle to pass through.When the 3rd axle of vehicle arrives automobile axle load brake tester 30, the 4th axle now is just parked on rear side lifting table 36, the proximity switch received on automobile axle load brake tester 30 is detected that vehicle institute measuring car axle arrives the signal of automobile axle load brake tester 30 by industrial computer 16, now data acquisition processing system is by the axle weight of the 3rd axle on the 4th axle that is recorded on rear side lifting table 36 and automobile axle load brake tester 30, according to the axle load allocation proportion of trailer the 3rd axle and the 4th axle, if the 3rd axle axle is great in level road the 3rd axle axle is heavy and the 4th axle axle is heavily less than at level road the 4th axle axle weight, industrial computer 16 is just by control system Controlling solenoid valve 2, air bag 28 is exitted, reduce rear side lifting table 36, Ruo tri-axle axle is heavily less than at heavy and the 4th axle axle of level road the 3rd axle axle great at level road the 4th axle axle weight, and industrial computer 16 just by control system Controlling solenoid valve 2, makes it inflate to air bag 28, raises rear side lifting table 36, in the process, data acquisition processing system will detect the axle weight of the 3rd axle and the 4th axle in real time, the axle load allocation proportion of trailer the 3rd axle and the 4th axle until the 3rd axle and the 4th axle axle weigh.Realize vehicle and simulate braking effect on actual road surface really at automobile axle load brake tester 30, thus detect vehicle braking performances exactly.Through the continuous prompting of dot matrix display screen 15, until during prompting brake, driver just touches on the brake, automobile axle load brake tester 30 braking force sensor detects that signal is sent to data acquisition processing system, calculate damping force now, after vehicle is completely static, dot matrix display screen 15 will show vehicle the 3rd axle left and right wheels damping force, there is the curve of the heavy and braking force signal of axle variation relation in time in the display interfaces of industrial computer 16, the 3rd axle braking force just detects complete.
The self-adjusting braking-force detecting device of automobile axle load based on stand, has the transformation of existing automobile axle load brake tester simple, convenient, fast, substantially increases the advantages such as multiple-axle vehicle braking performance test accuracy.For overcoming the deficiencies in the prior art, this method is according to the axle load allocation proportion of each axle of multiple-axle vehicle, the height of the subsidiary lift master of automatic vehicles shaft weight brake testing table, realize vehicle and simulate braking effect on real standard road surface really at automobile axle load brake tester, and then the braking ability of vehicle can be detected accurately.
Claims (10)
1., based on the self-adjusting braking-force detecting device of automobile axle load of stand, comprise automobile axle load brake tester (30), lifting table (3), data acquisition processing system and control system, it is characterized in that:
Described lifting table (3) is provided with identical two, described identical two are respectively front side lifting table 35 and rear side lifting table 36, described front side lifting table (35) and rear side lifting table (36) is uniform is positioned at both sides before and after automobile axle load brake tester (30), every platform lifting table comprises lifting table lifting device and ground;
Described lifting table lifting device comprises hang plate (24), lifting platen (23), axle weight sensor (27), lifting support joist steel (18), air bag (28) and riser guide (22);
Described ground is made up of front side ground (20) and rear side ground (34), and described front side ground (20) and described rear side ground (34) are symmetrical arranged, and are all provided with ground dip plane (33);
Described lifting platen (23) is connected by jointed shaft (21) with the hang plate (24) of both sides, described hang plate (24) is provided with hang plate web wheel (29) near the bottom, one end of ground dip plane (33), and described ground dip plane (33) is by hang plate web wheel (29) support inclined plates (24);
Described lifting platen (23) is fixed on rectangle steel framework (26), the upper surface of described axle weight sensor (27) is fixedly connected with rectangle steel framework (26), lower surface and the described lifting of described axle weight sensor (27) support joist steel (18) and are fixedly connected with, described air bag (28) is fixed on the base of every platform lifting table, upper surface and the lifting of described air bag (28) support joist steel (18) and contact, and described riser guide (22) is fixed on the base both sides of every platform lifting table; Described lifting supports joist steel (18) and moves up and down along riser guide (22);
Described data acquisition processing system comprises Signal-regulated kinase (8), analog quantity terminal block (9), analog acquisition card (14) and industrial computer (16);
Described analog acquisition card (14) is connected with analog quantity terminal block (9); Described analog quantity terminal block (9) is connected with Signal-regulated kinase (8); Described Signal-regulated kinase (8) is connected with the braking force sensor on the axle weight sensor (27) on described lifting table (3), the axle weight sensor on automobile axle load brake tester (30), automobile axle load brake tester (30) respectively;
Described control system comprises digital output card (1) and solenoid valve (2); Described digital output card (1) is connected with solenoid valve (2), and described solenoid valve (2) is connected with air bag (28).
2. the self-adjusting braking-force detecting device of a kind of automobile axle load based on stand according to claim 1, is characterized in that:
The longitudinal centre line of described front side lifting table 35, the longitudinal centre line of rear side lifting table 36 and automobile axle load brake tester 30 longitudinal centre line overlap, the cross central line of the front side cross central line of lifting table 35, the cross central line of rear side lifting table 36 and automobile axle load brake tester 30 is parallel to each other, and described automobile axle load brake tester 30 cross central line is 1350mm to the distance of front side lift master 35 and rear side lift master 36.
3. the self-adjusting braking-force detecting device of a kind of automobile axle load based on stand according to claim 1, is characterized in that:
Described hang plate (24) is provided with 8 pieces, every platform lifting table has 4 pieces of hang plates (24); The length of described hang plate (24) is identical with the length of lifting platen (23);
Described hang plate (24) lower surface fixes 3 pieces of hang plate channel-section steels (25), and the attachment coefficient of the upper plane of described hang plate (24) and the upper plane of lifting platen (23) is all more than 0.1.
4. the self-adjusting braking-force detecting device of a kind of automobile axle load based on stand according to claim 1, is characterized in that:
Described lifting platen (23) is provided with 4 pieces, and every platform lifting table is provided with 2 pieces of lifting platens (23);
The length of described lifting platen (23) is identical with the length of the cylinder above automobile axle load brake tester (30);
Described axle weight sensor (27) is provided with 8, and every platform lifting table is provided with 4, each maximum 4000kg that weighs.
5. the self-adjusting braking-force detecting device of a kind of automobile axle load based on stand according to claim 1, is characterized in that:
Described air bag (28) is provided with 8, and every platform lifting table is provided with 4;
Described riser guide (22) is provided with 4, and every platform lifting table is provided with 2.
6. the self-adjusting braking-force detecting device of a kind of automobile axle load based on stand according to claim 1, is characterized in that:
The pitch angle of described ground dip plane (33) is 45 degree, and ending vertical face, ground dip plane (32) is highly 36 to 38mm.
7. the self-adjusting braking-force detecting device of a kind of automobile axle load based on stand according to claim 1, is characterized in that:
Described lifting supports on joist steel (18) and is fixed with the spacing wing of lifting (17); Every platform lifting table base is fixed with the spacing door of lifting (19), is elevated spacing wing (17) and moves up and down along riser guide (22) in the space that the spacing door of lifting (19) limits with lifting support joist steel (18).
8. the self-adjusting braking-force detecting device of a kind of automobile axle load based on stand according to claim 7, is characterized in that:
The spacing wing of described lifting (17) is provided with 4, and every platform lifting table is provided with 2;
The spacing door of described lifting (19) is provided with 4, and every platform lifting table is provided with 2.
9. the self-adjusting braking-force detecting device of a kind of automobile axle load based on stand according to claim 1, is characterized in that:
Described digital output card (1), analog acquisition card (14) are all arranged in industrial computer (16) ISA slot, and described industrial computer (16), analog quantity terminal block (9) and Signal-regulated kinase (8) are all established and be placed in switch board (31).
10. by a detection method for the self-adjusting braking-force detecting device of the automobile axle load based on stand according to claim 1, it is characterized in that, comprise following concrete steps:
Step 1: by the equipment zeroing in data acquisition processing system, collection axle is heavy, braking force signal;
A), before vehicle enters and detects place, data acquisition processing system is heavy by the axle of described front side lifting table (35), the axle of rear side lifting table (36) is heavy and axle that is described automobile axle load brake tester (30) is heavy and damping force is set to zero;
B) after vehicle enters and detects place, dot matrix display screen (15) prompting vehicle detection axle sails automobile axle load brake tester (30) into, when detecting axletree and being on automobile axle load brake tester (30), the non-detection axis of rear adjacent is just on described rear side lifting table (36), non-detection axis adjacent above is just on described front side lifting table (35), now the proximity switch received on automobile axle load testing table 30 is detected that vehicle institute measuring car axle arrives the signal of automobile axle load brake tester 30 by industrial computer 16, pass through data acquisition processing system again, the non-measured axle axle weight of record now on front side lifting table 35, measurement axle axle weight on the heavy and automobile axle load brake tester 30 of non-measured axle axle on rear side lifting table 36.
Step 2: the height automatically regulating non-detection wheel on lifting table;
Multiple-axle vehicle enters automobile axle load brake tester (30), industrial computer (16) detects vehicle non-measured axle and measures axle axle weight, according to the axle load allocation proportion of each axle of multiple-axle vehicle, industrial computer (16) realizes, to air bag (28) inflation or venting, controlling the height of described front side lifting table (35) and rear side lifting table (36) by control system Controlling solenoid valve (2); In the process, data acquisition processing system detects the axle weight measuring axle and non-measured axle in real time, until non-measured axle and measurement axle axle weigh, the axle load allocation proportion of each axle of multiple-axle vehicle, simulates the braking effect on real standard road surface, the damping force of vehicle detected.
Step 3: detect vehicle and measure axle braking force;
A) after automatically regulating the height of described front side lifting table (35) and rear side lifting table (36), by dot matrix display screen (15) prompting driver brake, gather the braking force signal that automobile axle load brake tester (30) braking force sensor produces, and be sent to data acquisition processing system, calculate damping force now;
B) vehicle is completely static, dot matrix display screen (15) display vehicle is measured axle left wheel brake power (12) and measures axle left wheel brake power (13), and the curve of axle weight and braking force signal variation relation in time appears in the display interfaces of industrial computer (16).
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| CN201410783695.5A CN104502014B (en) | 2014-12-16 | 2014-12-16 | Braking-force detecting device that automobile axle load based on stand adjusts automatically and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410783695.5A CN104502014B (en) | 2014-12-16 | 2014-12-16 | Braking-force detecting device that automobile axle load based on stand adjusts automatically and method |
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| CN104502014A true CN104502014A (en) | 2015-04-08 |
| CN104502014B CN104502014B (en) | 2016-08-17 |
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