I. Scope of application

The equipment is suitable for bicycle safety performance testing.

II. Reference Standards

GB 3565-2005 "Bicycle Safety Requirements" 9.4 Wheel Clamping Force

III.Test Principle

Used to measure the minimum dismounting torque of the wheel axle nut of the bicycle, apply a certain force symmetrically in the direction of the dismounting force of the front wheel or rear wheel respectively, and check whether there is relative displacement after holding for 30 seconds.

IV. Test Methods

1. Fix the front wheel of the bicycle according to the standard;

2. Turn on the power supply, set the force application value on the touch screen, and set the force application time on the timer;

3, Factory has been set for 30 seconds;

4. Press the execute key to execute the test. The machine will automatically apply force to the test piece. When the set value is reached, the timer will start timing. When the set time is reached, the machine will automatically stop applying force.

5. After the test is completed, remove the test piece to check whether there is relative displacement between the front axle and the front fork, and judge whether it is qualified;

6. Assemble the rear wheel of the bicycle according to the standard and repeat step 2.3.1 to test the clamping force of the rear wheel.

V. Technical parameters

1.Force sensor measuring range: 1000N

2. Resolution of force sensor: 1/10000

3. Force measurement accuracy of the system: ±1%

4. Timer: 0-60S adjustable

5. Time accuracy: ±0.1S

6. Data storage: system memory or U disk

7. Number of tests: 0-999999 set arbitrarily

8. Control mode: computer automatic control

9. Display mode: 19-inch LCD screen

10. Data storage: computer automatic storage

11. Report Generation Method: The computer automatically generates the report in the format required by the customer

12. Auto-stop: Auto-stop if the force cannot reach the set value, and auto-stop if the test piece is damaged

13. Data Acquisition System: 24-bit Precision, National Instruments

14. Lou Data Processing System: LABVIEW, US National Instrument Platform

VI. Working Environment

The temperature is 15℃ ~ 25℃ and the relative humidity is 20% ~ 70% RH. The ground at the test site shall be level and level.

VII. Computers

 The operating system is the latest special testing software for the two-wheel unloading force testing machine under WIN7. The software itself contains detailed operating instructions, and a set of detailed operating instructions are attached at the same time. The computer can be compatible with OS/2.NOVELL.UNIX.WINDOWS NT and other networks and multiple users. The operating system is suitable for various software packages compatible with PC. The execution of the testing software can automatically print various reports.