CN201207243Y

CN201207243Y - Intelligent ABS synthetic performance experimental bench

Info

Publication number: CN201207243Y
Application number: CNU2008200169077U
Authority: CN
Inventors: 宋作军
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-23
Filing date: 2008-01-23
Publication date: 2009-03-11
Anticipated expiration: 2018-01-23

Abstract

The utility model relates to an intelligent ABS synthetic experimental platform, which comprises a dynamic driving system arranged on the experimental platform frame, a ABS hydraulic braking system, a data acquisition interface circuit and a microcomputer data processing system, wherein the dynamic driving system comprises an electromotor, front and rear axles, and four wheels; the ABS hydraulic braking system comprises a ABS assembly, a four-wheel brake and a four-way velocity sensor respectively connected with the ABS assembly; the microcomputer data processing system comprises a work controlling machine and a corresponding data processing software; the data acquisition interface circuit transfers the signals of the four-way velocity sensor and the signals of eight hydraulic control electromagnetic valves to the work controlling machine, the work controlling machine performs data processing, storage and displaying by the programmed data processing software. The utility model displays the construction and working process of ABS device visually in the form of actual object and dynamic, thereby improving teaching effect obviously. The utility model can be widely applied in teaching experiment of automotive professional ABS device.

Description

Intelligence ABS combination property bench

Technical field

The utility model belongs to education experiment utensil field, relates to automobile major ABS experiment device for teaching, is specifically related to a kind of intelligent ABS combination property bench.

Background technology

Usually, anti-blocking brake system of automobile ABS (Anti-lock Braking System) installs compositions such as vehicle-wheel speed sensor, ABS ECU (Electrical Control Unit) ECU (Electrical control unit), brake pressure regulating device and brake control circuit additional on the basis of common brake system, as shown in Figure 1.

Its principle of work is, wheel speed sensor inspection vehicle wheel speed, ECU analyzes according to the tach signal (wheel slip) of wheel, determine the motion state of wheel in the braking procedure, send steering order in good time, pass through brake-pressure controller, regulate the pressure of brake piping, prevent wheel lock up, make vehicle be in the gap rolling condition of critical locking all the time, improve the braking effect and the control stability of automobile, the sideslip when overcoming brake hard effectively, sideslip, whipping prevent the generation of situations such as vehicle body is out of control.

In recent years, the ABS technology is used widely on automobile, has improved the security of automobile, has promoted developing of automobile industry.But the ABS principle of device is comparatively abstruse, and structure is comparatively complicated, and in the teaching of automobile major ABS system, teachers and students are generally reflected relatively difficulty of ABS systematic teaching, therefore how in teaching with its visual in image showing, become the key of improving the quality of teaching.

Although units such as many domestic teaching aids manufacturing enterprise, school have developed the ABS combination property bench, ubiquity layout structure and analog demenstration distortion, designs simplification, shortcomings such as dynamic demonstration effect difference have influenced teaching efficiency.

The utility model content

Goal of the invention of the present utility model is: overcome the deficiency that prior art exists, design a kind of structure, the course of work and the principle of work that can show the ABS device visual in imagely, static structure combines with the dynamic duty process, make the principle of work of understanding ABS and the course of work that the student can be fast, improve the intelligent ABS combination property bench of teaching efficiency.

The technical solution of the utility model is: a kind of intelligent ABS combination property bench, comprise the power-driven system, the ABS brake fluid system that are installed on the experiment table framework, it is characterized in that, also comprise data acquisition interface circuit and computer data processing system, described power-driven system comprises motor, front and back axletree and four wheels, and described motor is given front and back axletree by belt with transmission of power as power source; Two axletrees link to each other with four wheels by constant velocity cardan joint; Described ABS brake fluid system comprises ABS assembly and the four-wheel brakes and the 4 bus speed sensors that are attached thereto, and the ABS brake fluid system is finished the abs braking to four wheels; Described data acquisition interface circuit comprises the hydrostatic control solenoid valve Signal Spacing treatment circuit of 4 bus speed sensors signal processing circuits and 8 ABS assemblies; Described computer data processing system comprises industrial computer and corresponding data process software; Described data acquisition interface circuit is delivered to industrial computer with data-signal, and industrial computer carries out processing, storage and the demonstration of data by the data programmed process software, shows the structure and the course of work of ABS device.

The utility model has following advantage compared with the prior art:

1, intelligent ABS device combination property bench structure of the present utility model is true to nature, but dynamic demonstration ABS principle of work, and the liquid crystal simulation shows the ABS course of work, satisfies the teaching of automobile major ABS system.

2, the utility model is with material object and movement form, structure, the course of work of visual in image displaying ABS device, theory teaching is combined with production practices, static structure combines with the dynamic duty process, the student can intuitively, easily understand the principle of work and the course of work of ABS, can significantly improve teaching efficiency.

3, the utility model is skilfully manufactured, and stable performance by the electronic circuit collection, handle speed of a motor vehicle fuel injection pressure signal, stores by industrial computer and shows, have true, dynamically, advantage such as memory, advanced technology, practical.

Description of drawings

Fig. 1 is the principle of work synoptic diagram of ABS system;

Among the figure: 1 is that front-wheel speed pickup, 2 is that brake pressure regulating device, 3 is that ABS ECU (Electrical Control Unit), 4 is that ABS warning lamp, 5 is that trailing wheel speed pickup, 6 is that parking light switch, 7 is that master cylinder, 8 is that proportional distribution valve, 9 is that wheel cylinder, 10 is that accumulator, 11 is an ignition switch.

Fig. 2 is a structural principle block scheme of the present utility model.

Fig. 3 is the structure electrical schematic diagram of the vehicle speed sensor signal processing circuit of embodiment of the present utility model.

Among the figure 1: amplify shaping IC, 2: the vehicle speed sensor signal, 3: the amplitude adjustment, 4: the signal input, 5: signal output, 6: the industrial computer interface, 7: pulsation suppresses, and 8: bootstrapping, 9:+5V, 10: frequency compensation, 11: gain is adjusted.

Fig. 4 is the structure electrical schematic diagram of the hydrostatic control solenoid valve Signal Spacing treatment circuit of embodiment of the present utility model.

Among the figure 1: photoelectricity is isolated IC, and 2: relay signal, 3: emitter follower, 4: signal output, 5: industrial computer interface, 6:+5V.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the principle of work synoptic diagram of ABS system, and in the braking procedure, ABS ECU (Electrical Control Unit) 3 constantly takes turns speed pickup 1 in the past and trailing wheel speed pickup 5 obtains wheel velocity signal, and is handled, and whether analysis has wheel to be about to locking is dragged cunning.

Do not drag cunning if there is wheel to be about to locking, brake pressure regulating device 2 does not participate in work, and master cylinder 7 and each wheel cylinder 9 communicate, and the pressure in the wheel cylinder 9 continues to increase, and this is the pressurized state in the abs braking process.

Cunning is dragged in locking soon if ABS ECU (Electrical Control Unit) 3 is judged certain wheel (being assumed to be the near front wheel), it is promptly given an order to brake pressure regulating device 2, close the passage of master cylinder 7 and left front wheel cylinder, the pressure of left front wheel cylinder is no longer increased, and this is the packing state in the abs braking process.

If ABS ECU (Electrical Control Unit) 3 is judged the near front wheel and still is tending towards locking and drags sliding state, it is promptly given an order to brake pressure regulating device 2, open the passage of left front wheel cylinder and fluid reservoir or accumulator (not drawing among the figure), oil pressure in the left front wheel cylinder is reduced, and this is the decompression state in the abs braking process.

Its principle of work is, relies on the vehicle speed sensor that is contained on highly sensitive wheel speed sensor on each wheel and the vehicle body, by computer control.During brake hard, in case find certain wheel lock up, computing machine immediate instruction pressure governor makes this brake cylinder of taking turns let out (subtracting) and presses, and makes wheel recover to rotate.The course of work of ABS is actually locking---unclamps the periodic duty process that---locking---unclamps, make vehicle be in the gap rolling condition of critical locking all the time, sideslip when overcoming brake hard effectively, sideslip, whipping prevent the generation of situations such as vehicle body is out of control.

In Fig. 2 structural principle block scheme of the present utility model, intelligence ABS combination property bench comprises power-driven system, ABS brake fluid system, data acquisition interface circuit and the computer data processing system that is installed on the experiment table framework, wherein power-driven system comprises motor, front and back axletree and four wheels, and motor is given front and back axletree by belt with transmission of power as power source; Two axletrees link to each other with four wheels by constant velocity cardan joint; The ABS brake fluid system comprises ABS assembly and the four-wheel brakes and the 4 bus speed sensors that are attached thereto, and the ABS brake fluid system is finished the abs braking to four wheels; The data acquisition interface circuit comprises the hydrostatic control solenoid valve Signal Spacing treatment circuit of 4 bus speed sensors signal processing circuits and 8 ABS assemblies; Computer data processing system comprises industrial computer and corresponding data process software; Data acquisition interface circuit outputting data signals is delivered to industrial computer, and industrial computer carries out processing, storage and the demonstration of data by the data programmed process software, shows the structure and the course of work of ABS device.

Among the embodiment of the present utility model, (220V 750W) is power source to intelligent ABS combination property bench, and specified output speed 1400r/min gives the front and back axletree with the wedge band with transmission of power with motor.Driving wheel diameter 8cm, engaged wheel diameter 16cm, the power power input that the front and back axletree rotates is 1500W, the axletree rated speed is 700r/min.

Intelligence ABS combination property bench is to set vehicle with the Passat, the wheel external diameter is 0.6m, girth is about 1.8m, and this testing table rotates corresponding automobile speed per hour and is about 76km/h, and the vehicle speed sensor traffic spike 79km/h that detects with automobile decoding instrument matches substantially.

The mechanism design of intelligence ABS combination property bench: intelligent ABS combination property bench is support with the 60cm*80cm*120cm framework, and four-wheel brakes is installed in the framework top, and two axletrees link to each other with wheel by constant velocity cardan joint.The brake pedal of detent and master cylinder are installed at one end, and ABS control module and hydraulic means are installed on the middle below of framework.

The ABS combination property bench is a platform with the automobile ABS brake fluid system; By finishing collection, processing and showing to vehicle speed signal; The collection of hydrostatic control solenoid valve signal, processing and demonstration; The software design of industrial computer and test gather vehicle speed sensor signal (4 tunnel), ABS hydrostatic control solenoid valve signal (8 tunnel) and handle, and the input industrial computer through after the software processes, at the industrial computer storage data, is showed its waveform on display.

In the structure electrical schematic diagram of the vehicle speed sensor signal processing circuit of Fig. 3 embodiment of the present utility model, amplify shaping IC and select the TBA820M chip for use, the vehicle speed sensor signal carries out sending into the chip signal input end after the amplitude adjustment, and the signal after the amplification shaping exports the industrial computer interface circuit to.

In the structure electrical schematic diagram of the hydrostatic control solenoid valve Signal Spacing treatment circuit of Fig. 4 embodiment of the present utility model, photoelectricity is isolated IC and is adopted the TTL113 opto-coupler chip, and the relay signal of control electromagnetic valve is delivered to the industrial computer interface circuit after photoelectricity is isolated.

Industrial computer adopts and grinds auspicious IPC-810 industrial computer, in conjunction with the PCL-812PG data collecting card, this capture card has the input of 16 tunnel simulating signals, the input of two-way timing signal etc., sample frequency reaches as high as 100KHz, and antijamming capability is strong, the various interference of energy filtering test site guarantee signal reliability.

The relay signal of four bus speed sensors signals and 8 hydrostatic control solenoid valves, isolate and the signal amplification through photoelectricity, in the input capture card, by acquisition software the tach signal input condition is sent into calculator memory, be implemented in real-time display system wheel velocity and relay working state signal on the industrial computer by programming, thereby show the ABS system work process.

The programming of data processing software utilizes the VB language in the industrial computer, adopts the modular design thinking, realizes the visual of whole signal acquiring system.Whole software comprises compositions such as testing table interface module, signal acquisition module, display module, data memory module and system supplymentary module.

Wherein visual programming technology, design experiment platform operation interface are adopted in the testing table interface.The interface man-machine interaction is good, and the user can be provided with system state very easily, sampling channel and display mode signal, and have help file, and user-friendly, satisfy the requirement of testing table signals collecting, data presentation and data recording.

The velocity variations of four wheels of data presentation real-time follow-up on the industrial computer, the break-make situation of ABS control module solenoid valve in the demonstration brake process.

Wheel speed data in the experimentation and hydrostatic control solenoid valve break-make situation are recorded in the industrial computer.

Intelligence ABS combination property bench, the part key structure is analysed and observe, and control circuit adopts the floor plan mode, and the teacher can carry out the overall process of each motion of mechanism of ocular demonstration and ABS (Anti-lock Braking System) in teaching process; Can explain intuitively for the effect of the connection of the circuit in the control circuit of ABS (Anti-lock Braking System) and each element simultaneously, can greatly improve students'interest in learning and enthusiasm.

The utility model is reasonable in design, and stable performance is practical, have true, dynamically, the characteristics such as memory, with in kind and Dynamic form, structure, the course of work of visual in image displaying ABS device make theory teaching combine with production practices, Static structure combines with the dynamic duty process, and the student understands operation principle and the course of work of ABS intuitively, can significantly carry High teaching efficiency can be widely used in the education experiment of automobile major ABS device.

Claims

1, a kind of intelligent ABS combination property bench, comprise the power-driven system, the ABS brake fluid system that are installed on the experiment table framework, it is characterized in that, also comprise data acquisition interface circuit and computer data processing system, described power-driven system comprises motor, front and back axletree and four wheels, and described motor is given front and back axletree by belt with transmission of power as power source; Two axletrees link to each other with four wheels by constant velocity cardan joint; Described ABS brake fluid system comprises ABS assembly and the four-wheel brakes and the 4 bus speed sensors that are attached thereto, and the ABS brake fluid system is finished the abs braking to four wheels; Described data acquisition interface circuit comprises the hydrostatic control solenoid valve Signal Spacing treatment circuit of 4 bus speed sensors signal processing circuits and 8 ABS assemblies; Described computer data processing system comprises industrial computer and corresponding data process software; Described data acquisition interface circuit is delivered to industrial computer with data-signal.