CN202066703U - Vehicle ABS (Anti-lock braking system) detection bench - Google Patents

Abstract

The utility model proposes a vehicle ABS detection platform, which includes a base, a simulation device, a transmission and tensioning mechanism, a measurement and control unit, and four roller assemblies with the same structure. Each roller assembly can be tested according to different wheel diameters and It is required to automatically adjust the wheelbase of the main roller and the auxiliary roller, so that the adhesion coefficient between each wheel and the simulated road surface can be adjusted arbitrarily, and the adhesion of the vehicle on various road surfaces can be simulated. By adopting the utility model, the moment of inertia of the drum will not be added to the wheel, which is beneficial to ensure the detection accuracy.

Description

A vehicle ABS testing platform

technical field

The utility model relates to the field of automobile detection, in particular to a vehicle ABS detection platform.

technical background

The application number 200710019075.4 published on May 21, 2008 is "An indoor vehicle ABS test bench with variable adhesion coefficient". Control the roller to realize the simulation of the road surface adhesion coefficient, realize the dynamic simulation of the vehicle braking process, and complete the detection of the working performance of the vehicle ABS system. The problem with this test bench is: when the test wheel is locked, the slip is transferred to the surface of the driving rotor and the driven rotor of the torque controller, and the kinematic relationship between the wheel and the ground when braking on the road is transformed into The motion relationship between the driving rotor and the driven rotor of the torque controller, so the wheel rotation part of the tested vehicle is additionally added with the moment of inertia of the roller during the test bench test, which affects the ABS work and cannot guarantee the detection accuracy.

Contents of the invention

In order to overcome the shortcomings of the above-mentioned indoor vehicle ABS test bench with variable adhesion coefficient, the utility model proposes a vehicle ABS test bench.

The technical solution adopted by the utility model to solve the technical problem is: to construct a vehicle ABS detection platform, including a measurement and control unit, a base, a front drive and tensioning mechanism of the left drum, a drive shaft of the front drum, a simulation device, a front drive of the right drum and a tensioning mechanism. Tensioning mechanism, front roller transmission shaft bearing seat, right roller middle transmission and tensioning mechanism, right roller rear transmission and tensioning mechanism, main and auxiliary roller speed sensors, rear roller transmission shaft, left roller rear transmission and tensioning mechanism, rear Roller transmission shaft bearing seat, middle drive and tensioning mechanism of left pulley, and front left pulley assembly, front right pulley assembly, rear left pulley assembly, rear right pulley assembly with the same structure; each pulley assembly includes machine Frame, main roller, sensing roller, main roller bearing seat, main roller moving mechanism, sensing roller position sensor, bracket, main roller position sensor, sensing roller speed sensor, auxiliary roller position sensor, auxiliary roller bearing seat, auxiliary roller Moving mechanism, auxiliary roller, main and auxiliary roller transmission and tensioning mechanism, there are guide rails on the frame; the main roller is supported on the guide rail of the frame through the main roller bearing seat, and the main roller is connected to the main roller through the main and auxiliary roller transmission and tension mechanism. The auxiliary roller is connected. The auxiliary roller is supported on the guide rail of the frame through the auxiliary roller bearing seat. One end of the bracket is connected with the frame. The sensing roller is supported on the frame by means of the bracket. The position of the sensing drum relative to the main drum reflects the radius of the detected vehicle tire; in order to detect the rotational speed of the sensing drum and calculate the wheel speed of the detected vehicle, a sensing drum speed sensor is installed at one end of the sensing drum; the main drum position sensor, The auxiliary drum position sensors all use linear displacement sensors, the main drum position sensor is used to detect the position of the main drum, and the auxiliary drum position sensor is used to detect the position of the auxiliary drum; one end of the main drum moving mechanism is fixed on the frame, and the other end is connected to the main drum The bearing seat is connected to make the main roller move reciprocating linearly along the guide rail of the frame; one end of the moving mechanism of the auxiliary roller is fixed on the frame, and the other end is connected with the bearing seat of the auxiliary roller to make the auxiliary roller move along the guide rail of the frame. The track makes reciprocating linear motion to realize the wheelbase adjustment of the main roller and the auxiliary roller; the roller assembly is fixed on the base through the frame, and one end of the drive shaft of the front roller passes through the front transmission and tensioning mechanism of the left roller and the main roller assembly of the front left roller. The drum shaft is connected, and the other end is connected with the main drum shaft of the front right drum assembly through the right drum front drive and tensioning mechanism. The front drum drive shaft is fixed on the base through the front drum drive shaft bearing seat. The simulation device is used to simulate the kinetic energy of the vehicle to be tested; the main roller shaft of the front right roller assembly is connected to the auxiliary roller shaft of the rear right roller assembly through the middle transmission and tension mechanism of the right roller; one end of the rear roller transmission shaft passes through the right roller The rear transmission and tensioning mechanism is connected to the auxiliary roller shaft of the rear right roller assembly, the other end is connected to the auxiliary roller shaft of the rear left roller assembly through the rear transmission and tensioning mechanism of the left roller, and the rear roller transmission shaft passes through the rear roller transmission shaft The bearing seat is fixed on the base, and the speed sensor of the main and auxiliary rollers is installed on the drive shaft of the rear roller; the auxiliary roller shaft of the rear left roller assembly is connected with the front left The main roller shaft connection of the roller assembly; the measurement and control unit and the simulation device, the main and auxiliary roller speed sensors and the sensing roller position sensors in each roller assembly, the main roller position sensor, the auxiliary roller position sensor, the sensing roller speed sensor, the main roller The moving mechanism of the roller and the moving mechanism of the auxiliary roller are electrically connected to collect information, control the moving mechanism of the main roller and the moving mechanism of the auxiliary roller according to the detection requirements, adjust the wheelbase of the main roller and the auxiliary roller, realize the simulation of the adhesion coefficient of different road surfaces, and store And process the data, output the detection result; after the detection, the measurement and control unit makes the main roller and the auxiliary roller close to each other through the main roller moving mechanism and the auxiliary roller moving mechanism, so that the wheels of the detected vehicle can be driven out of the roller.

The adhesion coefficient of the testing platform is controlled as follows: According to the analysis of the force of the tested vehicle on the roller, the adhesion force F _μ provided by the roller is:

F _μ ＝ μ(N ₁ +N ₂ ) (1)

${\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="N"\; filenames="HSA00000500604400031.png"\; state="\{\{state\}\}">N</figure-callout></span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="N"\; filenames="HSA00000500604400031.png"\; state="\{\{state\}\}">N</figure-callout></span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; Gs</span>}}{\mathrm{<span\; class="notranslate">\; cos</span>}\mathrm{<span\; class="notranslate">\; \&alpha;</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>$

Right now:

${\mathrm{<span\; class="notranslate">\; f</span>}}_{\mathrm{<span\; class="notranslate">\; \&mu;</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; \&mu;Gs</span>}}{\mathrm{<span\; class="notranslate">\; cos</span>}\mathrm{<span\; class="notranslate">\; \&alpha;</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; )</span>$

In formulas (1) to (3), μ is the adhesion coefficient between the roller and the tire; N ₁ and N ₂ are the support force of the main roller and auxiliary roller to the wheel respectively; Gs is the wheel load; α is the wheel on the roller placement angle. It can be seen that when the adhesion coefficient μ between the roller and the tire and the wheel load Gs are constant, the wheelbase of the main roller and the auxiliary roller can be adjusted according to the measurement requirements, the installation angle α of the wheel on the roller can be changed, and the adhesion force F _μ provided by the roller can be changed , to achieve adhesion coefficient adjustment. During the braking process, by detecting the information of the main and auxiliary drum speed sensors and the sensing drum speed sensor, it reflects the vehicle speed and the wheel speed and changes of each wheel, and realizes the performance detection of the vehicle ABS system.

The beneficial effects of the utility model are: the utility model can automatically adjust the wheelbase of the main drum and the auxiliary drum according to different wheel diameters and detection requirements, so that the adhesion coefficient between each wheel and the simulated road surface can be adjusted arbitrarily, and the simulated vehicle can move freely on each wheel. Adhesion on the road surface. By adopting the utility model, when the wheel is locked and the slipping occurs directly between the roller and the surface of the wheel, the moment of inertia of the roller will not be added to the wheel, which is beneficial to ensure the detection accuracy.

Description of drawings

Fig. 1 is a schematic diagram of mechanical transmission and electrical connection of the present utility model;

Fig. 2 is a schematic diagram of the overall mechanical structure of the utility model;

Fig. 3 is a schematic diagram of the mechanical structure of a drum assembly of the present invention.

In the figure, 1-frame, 2-main drum, 3-sensing drum, 4-main drum bearing seat, 5-main drum moving mechanism, 6-sensing drum position sensor, 7-bracket, 8-main drum position Sensor, 9-Sensing drum speed sensor, 10-Auxiliary drum position sensor, 11-Auxiliary drum bearing seat, 12-Auxiliary drum moving mechanism, 13-Auxiliary drum, 14-Main and auxiliary drum transmission and tensioning mechanism, 15-Base , 16-front left drum assembly, 17-left drum front drive and tensioning mechanism, 18-front drum drive shaft, 19-simulation device, 20-right drum front drive and tensioning mechanism, 21-front drum drive shaft bearing Seat, 22-front right roller assembly, 23-right roller intermediate transmission and tensioning mechanism, 24-rear right roller assembly, 25-right roller rear transmission and tensioning mechanism, 26-main and auxiliary roller speed sensor, 27- Rear drum drive shaft, 28-left drum rear drive and tensioning mechanism, 29-rear drum drive shaft bearing seat, 30-rear left drum assembly, 31-left drum intermediate drive and tensioning mechanism, 32-measurement and control unit.

Detailed ways

A vehicle ABS testing platform as shown in Figures 1, 2, and 3 includes a measurement and control unit 32, a base 15, a left drum front drive and tensioning mechanism 17, a front drum drive shaft 18, a simulation device 19, a right drum front drive and Tensioning mechanism 20, front roller transmission shaft bearing seat 21, right roller intermediate transmission and tensioning mechanism 23, right roller rear transmission and tensioning mechanism 25, main and auxiliary roller speed sensors 26, rear roller transmission shaft 27, left roller rear transmission And tensioning mechanism 28, rear drum transmission shaft bearing seat 29, left drum intermediate transmission and tensioning mechanism 31, and front left drum assembly 16, front right drum assembly 22, rear left drum assembly 30, rear Right drum assembly 24; each drum assembly includes frame 1, main drum 2, sensing drum 3, main drum bearing seat 4, main drum moving mechanism 5, sensing drum position sensor 6, bracket 7, main drum position Sensor 8, sensing drum speed sensor 9, auxiliary drum position sensor 10, auxiliary drum bearing seat 11, auxiliary drum moving mechanism 12, auxiliary drum 13, main and auxiliary drum transmission and tensioning mechanism 14, and guide rails on frame 1; The main roller 2 is supported on the guide track of the frame 1 through the main roller bearing seat 4, the main roller 2 is connected with the auxiliary roller 13 through the main and auxiliary roller transmission and tension mechanism, and the auxiliary roller 13 is supported on the frame through the auxiliary roller bearing seat 11 1 on the guide track; one end of the bracket 7 is connected to the frame 1, the sensing roller 3 is supported on the frame 1 by means of the bracket 7, and the sensing roller position sensor 6 is a rotation angle sensor, which is used to measure the relative position of the sensing roller 3 to the main roller The position of 2 reflects the radius of the detected vehicle tire; in order to detect the rotating speed of the sensing drum 3 and calculate the wheel speed of the detected vehicle, a sensing drum speed sensor 9 is installed at one end of the sensing drum 3; the main drum position sensor 8, the auxiliary drum The position sensors 10 all adopt linear displacement sensors, the main drum position sensor 8 is used to detect the position of the main drum 2, and the auxiliary drum position sensor 10 is used to detect the position of the auxiliary drum 13; the main drum moving mechanism 5 and the auxiliary drum moving mechanism 12 both adopt The motor drives the screw mechanism, the motor casing of the main roller moving mechanism 5 is fixed on the frame, the screw mechanism is connected with the main roller bearing seat 4, the motor casing of the auxiliary roller moving mechanism 12 is fixed on the frame, the screw mechanism and the auxiliary roller bearing The seat 11 is connected, and the rotation of the motor drives the screw mechanism to rotate so that the main drum 2 and the auxiliary drum 13 make a reciprocating linear motion along the guide track of the frame 1, so as to realize the wheelbase adjustment of the main drum 2 and the auxiliary drum 13; the drum assembly passes through the frame 1 Fixed on the base 15, one end of the front drum drive shaft 18 is connected to the main drum shaft of the front left drum assembly 16 through the left drum front drive and tension mechanism 17, and the other end is connected to the front right drum assembly 16 through the right drum front drive and tension mechanism 20. The main roller shaft of the roller assembly 22 is connected, the front roller transmission shaft 18 is fixed on the base 15 through the front roller transmission shaft bearing seat 21, and the simulation device 19 is installed on the front roller transmission shaft 18, and the simulation device 19 adopts a flywheel for simulating The kinetic energy of the vehicle to be measured; the main roller shaft of the front right roller assembly 22 passes through the middle transmission and tensioning mechanism of the right roller 23 is connected with the auxiliary roller shaft of the rear right roller assembly 24; one end of the rear roller transmission shaft 27 is connected with the auxiliary roller shaft of the rear right roller assembly 24 through the right roller rear transmission and tensioning mechanism 25, and the other end is passed through the left roller rear transmission And the tensioning mechanism 28 is connected with the auxiliary drum shaft of the rear left drum assembly 30, the rear drum transmission shaft 27 is fixed on the base 15 through the rear drum transmission shaft bearing seat 29, and the main and auxiliary drum speed sensors are arranged on the rear drum transmission shaft 27 26; the auxiliary roller shaft of the rear left roller assembly 30 is connected to the main roller shaft of the front left roller assembly 16 through the left roller intermediate transmission and tensioning mechanism 31; the measurement and control unit 32 and the simulation device 19, the main and auxiliary roller speed sensors 26 and The sensing drum position sensor 6, the main drum position sensor 8, the auxiliary drum position sensor 10, the sensing drum rotational speed sensor 9, the main drum moving mechanism 5, and the auxiliary drum moving mechanism 12 in each drum assembly are electrically connected for collecting information . Control the main roller moving mechanism 5 and the auxiliary roller moving mechanism 12 according to the detection requirements, adjust the wheelbase of the main roller 2 and the auxiliary roller 13, realize the simulation of different road surface adhesion coefficients, store and process the data, and output the detection results; after the detection is completed , the measurement and control unit 32 makes the main roller and the auxiliary roller close to each other through the main roller moving mechanism 5 and the auxiliary roller moving mechanism 12, so that the wheels of the detected vehicle are driven out of the roller.

The drum moving mechanism of the present utility model can also adopt a hydraulic cylinder drive mode, one end of the main drum hydraulic cylinder is fixed on the frame, the other end is connected with the main drum bearing seat 4, one end of the auxiliary drum hydraulic cylinder is fixed on the frame, the other end is connected to the The auxiliary roller bearing housing 11 is connected, and the main roller 2 and the auxiliary roller 13 make a reciprocating linear motion along the guide track of the frame 1 through the expansion and contraction of the main roller hydraulic cylinder and the auxiliary roller hydraulic cylinder, so as to realize the wheelbase of the main roller 2 and the auxiliary roller 13 adjust.

The simulation device 19 of the present utility model can also adopt the combined mode of flywheel and compensation motor to expand the simulation range.

Claims (5)

1. vehicle ABS monitor station, comprise measurement and control unit [32], base [15], a preceding transmission and strainer [17] roll left, front roll transmission shaft [18], analogue means [19], transmission and strainer [20] before the right cylinder, front roll transmission shafts bearing [21], transmission and strainer [23] in the middle of the right cylinder, transmission and strainer [25] behind the right cylinder, major-minor drum rotation speed sensor [26], back roll transmission shaft [27], a back transmission and strainer [28] roll left, back roll transmission shafts bearing [29], a middle transmission and strainer [31] roll left, and structure identical before the assembly [16] that rolls left, preceding right roller assembly [22], after the assembly [30] that rolls left, back right roller assembly [24], it is characterized in that each roller assembly all comprises frame [1], master rotor [2], sensing cylinder [3], main drum shaft bearing [4], master rotor travel mechanism [5], sensing cylinder position sensor [6], support [7], master rotor position transducer [8], sensing drum rotation speed sensor [9], auxiliary cylinder position transducer [10], auxiliary roller axis bearing [11], auxiliary cylinder travel mechanism [12], auxiliary cylinder [13], transmission of major-minor cylinder and strainer [14], frame has guide rail on [1], master rotor [2] is supported on the guide rail of frame [1] by main drum shaft bearing [4], master rotor [2] is connected with auxiliary cylinder [13] by transmission of major-minor cylinder and strainer [14], auxiliary cylinder [13] is bearing on the guide rail of frame [1] by auxiliary roller axis bearing [11], support [7] one ends link to each other with frame [1], sensing cylinder [3] is bearing on the frame [1] by support [7], sensing cylinder position sensor [6] is a rotary angle transmitter, sensing cylinder [3] one ends are equipped with sensing drum rotation speed sensor [9], master rotor position transducer [8], auxiliary cylinder position transducer [10] all adopts linear displacement transducer, master rotor travel mechanism [5] one ends are fixed on the frame [1], the other end links to each other with main drum shaft bearing [4], and auxiliary cylinder travel mechanism [12] one ends are fixed on the frame [1], the other end links to each other with auxiliary roller axis bearing [11]; Roller assembly is fixed on the base [15] by frame [1], front roll transmission shaft [18] one ends are connected with the main drum shaft of the assembly [16] that before rolls left by roll left a preceding transmission and strainer [17], the other end is connected with the main drum shaft of preceding right roller assembly [22] by transmission before the right cylinder and strainer [20], front roll transmission shaft [18] is fixed on the base [15] by front roll transmission shafts bearing [21], analogue means [19] is installed on the front roll transmission shaft [18], the main drum shaft of preceding right roller assembly [22] is connected with the auxiliary roller axis of the right roller assembly in back [24] by transmission and strainer [23] in the middle of the right cylinder, back roll transmission shaft [27] one ends by right cylinder after transmission and strainer [25] be connected with the auxiliary roller axis of the right roller assembly in back [24], the other end by roll left a back transmission and strainer [28] with after the roll left auxiliary roller axis of an assembly [30] be connected, back roll transmission shaft [27] is fixed on the base [15] by back roll transmission shafts bearing [29], back roll transmission shaft [27] is provided with major-minor drum rotation speed sensor [26], after the roll left auxiliary roller axis of an assembly [30] be connected with the main drum shaft of the assembly [16] that before rolls left by roll left a middle transmission and strainer [31]; Sensing cylinder position sensor [6] in measurement and control unit [32] and analogue means [19], major-minor drum rotation speed sensor [26] and each roller assembly, master rotor position transducer [8], auxiliary cylinder position transducer [10], sensing drum rotation speed sensor [9], master rotor travel mechanism [5], auxiliary cylinder travel mechanism [12] are electrically connected.

2. a kind of vehicle ABS monitor station as claimed in claim 1 is characterized in that master rotor travel mechanism [5], auxiliary cylinder travel mechanism [12] all adopt the motor-driven screw mechanism.

3. a kind of vehicle ABS monitor station as claimed in claim 1 is characterized in that master rotor travel mechanism [5], auxiliary cylinder travel mechanism [12] all adopt the Driven by Hydraulic Cylinder mode.

4. a kind of vehicle ABS monitor station as claimed in claim 1 is characterized in that analogue means [19] adopts flywheel.

5. a kind of vehicle ABS monitor station as claimed in claim 1 is characterized in that analogue means [19] adopts flywheel and small electromotor array mode.

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