CN111289260A

CN111289260A - Electric motor car braking capability test appearance system

Info

Publication number: CN111289260A
Application number: CN202010005622.9A
Authority: CN
Inventors: 陆瑞强; 莫梁君; 邱初暄; 程文彬; 张佳; 周伟光
Original assignee: Guangzhou Customs Technology Center
Current assignee: Guangzhou Customs Technology Center
Priority date: 2020-01-03
Filing date: 2020-01-03
Publication date: 2020-06-16

Abstract

The invention provides an electric vehicle brake performance tester system which comprises a PLC (programmable logic controller), wherein the PLC is electrically connected with a microcomputer, the PLC is electrically connected with a high-speed A/D (analog/digital) collector, the high-speed A/D collector is electrically connected with front brake lever sensors, the number of the front brake lever sensors is three, the PLC is electrically connected with a pneumatic servo, the PLC is electrically connected with a front wheel servo, and the PLC is electrically connected with a rear wheel servo. The computer is automatically controlled in the whole process, and automatically loaded according to a set program. The control system has the power failure recovery function, the external power fails, the system automatically stops to protect and automatically stores the test result of the last time, the system automatically stops, the automatic stop exceeds the required precision, the automatic stop is realized when the force value disappears, the sample is damaged and automatically stops, the test curve can be tracked and displayed at any time, any section on the curve can be subjected to amplification analysis, the sample is broken and overloaded, and the overcurrent automatic protection function is realized.

Description

Electric motor car braking capability test appearance system

Technical Field

The invention relates to the technical field of electric vehicle testing, in particular to an electric vehicle brake performance tester system.

Background

An electric bicycle is a mechatronic personal transportation tool which takes a storage battery as auxiliary energy and is provided with an electric motor, a controller, the storage battery, a rotating handle brake handle and other operating components and a display instrument system on the basis of a common bicycle.

Because electric bicycle uses comparatively extensively in china, and audience foundation is big, so electric bicycle's detection is just especially necessary, guarantees its braking performance's safety, but the detection among the prior art still has following problem: 1. the operation is troublesome in the aspect of mechanically mounting the sample, and the reliability is not high; 2. aspects of software measurement capture and measurement data are unreliable.

Disclosure of Invention

In order to solve the defects of the prior art, the invention provides a comprehensive tester for an electric bicycle, which solves the problems in the background art.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides an electric motor car braking performance tester system, includes the PLC controller, PLC controller electric connection microcomputer, PLC controller electric connection high-speed AD collector, brake handle sensor before the high-speed AD collector electric connection, preceding brake handle sensor is equipped with threely, PLC controller electric connection is pneumatic servo, PLC controller electric connection front wheel is servo, PLC controller electric connection rear wheel is servo.

The invention is further described to be provided with a movable bracket, a front fork bracket and a function control box, wherein the movable bracket is also provided with a spraying device for wet braking, and the movable bracket is also provided with a loading weight.

The invention is further described in that the front wheel servo is provided with a front wheel fixing device, the front wheel fixing device comprises a height adjusting hand wheel and a front wheel rolling wheel, and the height adjusting hand wheel is also provided with a clamp hand wheel for clamping the front wheel of the bicycle.

The invention is further described in that the rear wheel servo is provided with a rear wheel fixing device, the rear wheel fixing device comprises a locking nut and a hand wheel for locking the rear wheel of the bicycle, and the locking nut is provided with a clamp for clamping the wheel.

The invention is further described by a saddle pressurizing device which comprises a boosting cylinder, a rotary locking handle and a pressure sensor, wherein a saddle pressing plate is arranged at the bottom end of the pressure sensor, and a telescopic locking handle is arranged on one side of the rotary locking handle.

Compared with the prior art, the invention has the advantages that:

the whole process of the computer is automatically controlled, and the computer automatically loads according to a set program. The control system has a power failure recovery function, the external power is cut off, the system automatically stops to protect and automatically stores the test result of the last time, the system automatically stops when the accuracy exceeds the required accuracy, the system automatically stops when the force value disappears, the test sample is automatically stopped when damaged, the test curve can be tracked and displayed at any time, any section on the curve can be subjected to amplification analysis, the test sample is broken and overloaded, the overcurrent automatic protection is realized, all tests can be freely stored, and the table format is automatically set;

the aluminum alloy metal structure and the movable door assembled mechanical structure are adopted, so that the maintenance and regular maintenance work is facilitated, meanwhile, the transportation, transition and debugging of the equipment are facilitated, the work of a transport vehicle and the trouble of hoisting a crane installed on the equipment upstairs can be facilitated, and the whole machine is designed to occupy a small area and is convenient to use;

the convenience of the computer for man-machine operation and the huge data image and graphic processing capacity of the computer are utilized, so that the instrument is convenient to use for man-machine operation, and meanwhile, the high-speed and real-time capacity of the PLC is utilized to carry out high-speed control and data acquisition on equipment.

Reference numerals

Fig. 1 is a schematic diagram of the principle of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1, as shown in figure 1:

According to the preferable technical scheme, the brake system is further provided with a movable support, a front fork support and a function control box, the movable support is further provided with a spraying device for wet braking, and the movable support is further provided with loading weights.

The preferred technical scheme of this embodiment, the front wheel servo is equipped with front wheel fixing device, front wheel fixing device includes altitude mixture control hand wheel and front wheel roll wheel, altitude mixture control hand wheel still is equipped with the anchor clamps hand wheel that is used for cliping the bicycle front wheel.

According to the preferable technical scheme, the rear wheel is provided with a rear wheel fixing device in a servo mode, the rear wheel fixing device comprises a locking nut and a hand wheel, the locking nut is used for locking a rear wheel of the bicycle, and the locking nut is provided with a clamp used for clamping the wheel.

According to the preferable technical scheme, the saddle pressurizing device comprises a boosting cylinder, a rotary locking handle and a pressure sensor, a saddle pressing plate is arranged at the bottom end of the pressure sensor, and a telescopic locking handle is arranged on one side of the rotary locking handle.

In the present embodiment, all the components are general standard components or components known to those skilled in the art, and the structure and principle thereof can be known to those skilled in the art through technical manuals or through routine experiments.

The experimental mode is as follows:

1. testing the load of the braking system;

I. testing a hand brake: the bicycle is mounted and fixed on a testing machine, and a brake handle of the brake is stressed to a transverse handle pipe to be connected if a dry brake handle is used. The wheel is rotated and repeated five times, and each time is not less than 75 mm.

2. Testing the performance of the hand brake;

I. and (3) mounting the finished vehicle on a testing machine, setting brake handle force, such as (250N) testing times, automatically applying the brake handle force to a set value by the machine after the test is started, driving the wheel to rotate for a circle by the machine at a constant speed, and repeating the test until the testing times are finished.

3. Carrying out a whole vehicle dynamic test;

I. after the parameters are set, the computer can automatically control the riding speed, the test times and the test time of the brake lever force, the riding distance and the automatic stop recording data after the test is finished.

And II, measuring the braking force of the independent front brake or rear brake, a braking force/time curve and a braking force/speed curve.

And III, performing dry-wet braking comparison measurement on the bicycle.

4. Testing heat resistance;

1. the braking power of bicycle can be input and set, and the number of times and interval time of the power can be set.

5. Fatigue testing;

1. the braking time, the gap time and the braking times can be set.

The experimental data are as follows:

in summary, the optimal diameter is therefore: y is 30.8+0.606. x.

And ± 20% of the heel limit line is:

YL＝80％(30.8+0.606X)

＝24.64+0.485X

YH＝120％(30.8+0.606X)

＝36.94+0.727

the curve of-20% position plus or minus 20% is obtained as the above table, and the limit line of plus or minus 20% of 1.2.3.4 test points is qualified (note: the braking force is above 80N).

Hand valve testing

Dry test:

the application force was increased continuously by 20,40,60, …,180N (juvenile car 120N) at 20N or the braking force was greater than 700N three times, 3 times in 1 minute, and each test allowed to cool for 1 minute.

Wet test:

the test method was similar to the dry state, and the brakes were sprayed 5 seconds before the start of the test.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature. Also, a first feature "above," "over," and "on" a second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature, and a first feature "below," "under," and "under" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the first feature is at a lower level than the first feature.

In the description of the present specification, reference to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention, and schematic representations of the terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the principles and spirit of the present invention.

Claims

1. The utility model provides an electric motor car braking performance tester system, includes the PLC controller, PLC controller electric connection microcomputer, its characterized in that, PLC controller electric connection high-speed AD collector, brake lever sensor before the high-speed AD collector electric connection, preceding brake lever sensor is equipped with threely, PLC controller electric connection pneumatic servo, PLC controller electric connection front wheel is servo, PLC controller electric connection rear wheel is servo.

2. The electric vehicle brake performance tester system according to claim 1, further comprising a movable bracket, a front fork bracket and a function control box, wherein the movable bracket is further provided with a spraying device for wet braking, and the movable bracket is further provided with a loading weight.

3. The electric vehicle brake performance tester system according to claim 1, wherein the front wheel servo is provided with a front wheel fixing device, the front wheel fixing device comprises a height adjusting hand wheel and a front wheel rolling wheel, and the height adjusting hand wheel is further provided with a clamp hand wheel for clamping the front wheel of the bicycle.

4. The electric vehicle brake performance tester system according to claim 1, wherein the rear wheel servo is provided with a rear wheel fixing device, the rear wheel fixing device comprises a locking nut and a hand wheel for locking a rear wheel of a bicycle, and the locking nut is provided with a clamp for clamping a wheel.

5. The electric vehicle brake performance tester system according to claim 1, characterized in that it further comprises a saddle pressurizing device, the saddle pressurizing device comprises a boosting cylinder, a rotary locking handle and a pressure sensor, a saddle pressing plate is arranged at the bottom end of the pressure sensor, and a telescopic locking handle is arranged at one side of the rotary locking handle.