Current detection and plug-in assembly method of light touch switch
来源:Dongguan Yanghan Industrial Co., Ltd. 时间:2020-11-27
Assembly method of touch switch
The biggest advantage of using plug-in method to assemble circuit is that there is no need to weld or make printed circuit board, the circuit and components can be changed simply, and it can be used many times. It is convenient to use and the cost is low.
Therefore, touch the key switch in product development, development process and curriculum design has been widely used. However, the biggest disadvantage of the insertion method is that the spring of the jack will become loose and the elasticity will be poor after being used for many times, which will simply constitute poor contact. It can only be used for experiment, and can not enter the market as a product.
Therefore, the breadboard that has been used many times should be opened from the opposite side, and the reed with poor elasticity should be taken out, and the tweezers should be used to adjust it so as to enhance the elasticity and prolong the service life of the bread plate.
Current detection of light touch switch
The waterproof lighttouch switch is a switch that can be washed in water or rain without failure. Generally, the waterproof switch is IP67, which means that it can completely protect the dust in the air. At the same time, it can be about 1m underwater, and it will not be damaged in 30 minutes at normal temperature; The water-proof light touch switch is the moving contact speed before closing and after opening, which has a vital impact on the breaking function of the switch.
Therefore, the travel time characteristic detection of high-voltage switch is an important content of high-voltage switch detection. Because the moving contact of the switch moves in a straight line, an additional part which moves with the moving contact can be installed. When the moving contact does the opening and closing operation, the additional part will move in a straight line with the connecting rod. After passing through the photoelectric sensor, the continuously changing displacement will be changed into a series of electric pulse signals.
It is also the basis for calculating the opening and closing speed of high voltage switch. In the control circuit of the current loop, the current amplifier generally chooses a larger gain. Its advantage is that a smaller resistance can be selected to obtain a satisfactory detection voltage, and the detection resistance is small and the loss is small.
The opening and closing speed of high-voltage switch, especially recording the number of the pulses, can complete the measurement of the whole stroke parameters of the moving contact; together, recording the time value of each electric pulse, dividing the displacement together, the maximum speed and average speed of the moving contact can be calculated.
