Testing method and testing device of cooling assembly with jump testing function and rotating-speed testing function
A technology for testing functions and testing devices, which is applied to devices using optical methods, measuring devices, and optical devices, etc. It can solve the problems that it is difficult to obtain the displacement information of the narrow side of the "point" and the measurement accuracy is not enough, and achieve The effect of low cost, high precision and high efficiency
Active Publication Date: 2014-04-09
SHANGHAI BROSE ELECTRIC MOTORS
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Problems solved by technology
The traditional laser speed sensor irradiates a point and captures the displacement through this point, but the problem is that the "point" is difficult to obtain the displacement information of the narrow side, so the measurement accuracy is not enough
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[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0037] Cooperate with reference figure 1 As shown, the cooling assembly testing device 1 with beating and rotating speed testing functions of the present invention includes:
[0038] A frock fixing unit 10 is fixed on a frame 11. The frame 11 is stable and firm as the base of the whole testing device. An up and down moving track 20 is respectively arranged on the left and right sides of the frock fixing unit 10. The up and down A moving block 21 is slid on the moving guide rail 20, a fixed block 22 is arranged on the bottom of the tooling fixing unit 10, and a horizontal moving guide rail 23 is re...
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The invention discloses a testing method of a cooling assembly with a jitter testing function and a rotating-speed testing function. The testing method comprises the following steps of installing the cooling assembly on a tool fixing unit; transmitting laser by a laser transmitter to irradiate a narrow edge of a fan of the cooling assembly; driving the fan to rotate, acquiring distance change information of all points on the narrow edge relative to the laser transmitter by laser reflection signals so as to finish jitter test; further simulating the distance change information of all the points on the narrow edge relative to the laser transmitter to form an oscillogram, and calculating the rotating speed of the fan on the basis of the period of the oscillogram. The testing method disclosed by the invention has the advantages that the laser transmitted by the laser transmitter is a bundle of straight line, so that global displacement information of the narrow edge of the fan is easily captured; the jitter of the fan is calculated by the measured distance change waveform, and the rotating speed of the fan can be directly calculated by utilizing the distance change waveform, so that the function of testing the rotating speed and the jitter simultaneously is realized, and the trouble of multiple measurement is avoided.
Description
technical field [0001] The invention relates to a testing method and device for testing axial runout and rotating speed of a fan, in particular to a cooling assembly testing method and device capable of testing runout and rotating speed. Background technique [0002] After the fan assembly is assembled, a comprehensive test is required, including current, rotational speed and axial runout tests. Among them, the current and speed are online automatic tests, and the axial runout test is an off-line sampling test. [0003] The traditional axial runout measurement method is to place the fan assembly flat on a marble platform after the on-line performance test is completed, place the dial gauge head on the edge of the fan, and manually rotate the fan to calculate the outside of the fan from the dial gauge. The difference between the highest point and the lowest point of the fan is used as the axial runout value of the fan. Since the maximum diameter of the fan reaches 450mm, th...
Claims
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IPC IPC(8): G01B11/00G01P3/36
Inventor 吴振西方勇黄杰李声义阮洋屠欣栋
Owner SHANGHAI BROSE ELECTRIC MOTORS