Durability test system and high-efficiency consistency test method for electrical appliance sockets

Abstract

The invention discloses a durability test system and a high-efficiency consistency test method for electrical appliance sockets used for household and similar purposes. The system consists of an upper computer control device, a lower computer control device and a stepping motor execution operating device, wherein a stepping motor actuator replaces the conventional pneumatic rod actuator, and the disadvantages that the pneumatic rod actuator has heavy operation and maintenance workload and high cost are eliminated. Three-dimensional clamp numerical control positioning has the advantages of continuous testing without interruption, precise positioning and high test result consistency. The test under the control of a corrected elevator speed analogue quantity is implemented referring to an elevator speed curve, wherein the test comprises speed open-loop control of a non-plug sub-stroke and displacement closed-loop control of a plug sub-stroke; the whole process of the corrected elevator speed test does not have acceleration transilience, so that both the test efficiency and the test precision are taken into consideration; in addition, the probability that test equipment is damaged by a rigid mechanical transmission pair of a stepping motor is stopped by the displacement closed-loop control of the plug sub-stroke.

Description

technical field [0001] The invention relates to the technical field of durability testing of household and similar electrical appliances, in particular to a durability testing system and a high-efficiency consistency testing method for household and similar electrical sockets. Background technique [0002] As a basic circuit connection device, household and similar electrical sockets are an indispensable electrical accessory product in work and life. An effective test system and test method is one of the key supporting technologies to ensure the quality of the socket. The quality of the socket is directly related to the reliable use of the connected electrical appliances and the personal safety of the user. The durability index of electrical sockets is the product technical index specified in the national mandatory standards; the connotation of durability refers to the working period of the product without failure (or without maintenance), which is used to characterize the u...

AI Technical Summary

Problems solved by technology

[0003] 1. During the statutory durability index period, it is impossible to ensure that electrical appliances can be reliably connected to the circuit through the socket, or to prevent the disconnection caused by socket defects after the circuit is connected; this will affect people's normal work and life

[0004] 2. Short circuits caused by socket defects cannot be ruled out within the statutory durability index period; this will damage electrical appliances and even endanger personal safety

[0005] 3. It is impossible to eliminate the virtual connection phenomenon of the mating surface of the socket and plug within the statutory durability index period, that is, the circuit is in a state of being on and off or about to be broken; this will lead to local high heat on the mating surface and circuit aging, And then cause a fire, causing great loss of life and property

[0010] 1. The operation and maintenance workload and cost of the test system are too large

Under the current technical conditions, the average life of the pneumatic rod is about 100,000 times, and a socket durability test requires 10,000 plugging and unplugging; the loss rate of the pneumatic rod is too high, resulting in a sharp increase in test costs and operation and maintenance workload

[0011] 2. Complicated operation, low efficiency and precision

First of all, when fixing the socket, the test system adopts two-dimensional fixtures and manual visual clamping methods. Before the test, the clamping and positioning of the socket needs to be adjusted repeatedly, which is cumbersome and time-consuming. Second, the socket has undergone a certain number of durable insertions and removals Finally, due to the impact force when inserting and the friction force when pulling out, the fixture that fixes the socket is often shifted. Therefore, it is not uncommon to be forced to stop and re-clamp and position during the test, and the test efficiency is reduced. Finally, manual visual inspection Clamp positioning has high requirements for testers, and the test results vary considerably from person to person (accuracy of clamping and positioning of the socket), and the test accuracy is low

[0012] 3. The consistency of test results needs to be improved

Under the control of the opening / closing switch of the pneumatic valve, the pneumatic rod completes the plugging and unplugging operations required for the durability test of the socket; based on the consideration of test efficiency, the test stroke speed of the pneumatic rod cannot be too low, but the plug and socket will be connected at high speed. There will be more or less impact, even sparking and arcing, which will not only damage the socket of the test piece, but also make the consistency of the test results worse

Although the national standard does not strictly limit the plug-in speed and clamping positioning accuracy of the socket, theoretical analysis and experimental tests have shown that: the durability test value is related to the plug-in speed and the clamping positioning accuracy of the socket-because of the plug-in speed and positioning accuracy different, A laboratory judged qualified socket may be rejected in B laboratory, and vice versa

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