The TGQH9203 obstructive pulmonary rehabilitation device is an electronic device for the treatment of obstructive pneumonia. The device can generate electrical pulses with a wave width of 0.3ms and a continuously adjustable amplitude of 10 to 150V, which has a certain effect on the rehabilitation of obstructive pneumonia.
Working principle: IC1, IC2, IC3 and related components in the figure constitute the working timing control circuit of the device. Among them, IC1, R1 ~ R3, C1, C2 form a multivibrator, and its output provides a clock signal for IC2. IC3 is a bistable flip-flop composed of 1/2 double D flip-flop CD4013. After the circuit is powered on, the power supply causes the bistable flip-flop to enter the stable state of Q = 0 and Q = 1 via C3 and R5. Among them, Q = 0 is directly added to the {11} pin of IC2, so that IC2 starts counting; and Q = 1 makes the LED-D emit light through the resistor RD and switch KD, indicating that the circuit enters the timing state, and Q = 1 is added to the IC9 { 1) The foot makes the AND door open. IC2 is a fourteen-bit serial counter, and its Q13 and Q14 correspond to frequency division of 2 (13th power) and 2 (14th power), respectively. According to the parameters shown in the figure and the position of switch K1-2, when the circuit works for 60 minutes, Q14 will output a high level, this level step is added to the CP end of IC3, making IC3 flip to Q = 1, Q = 0 Steady state. Among them, Q = 1 is added to the {11} pin of IC2 to stop IC2 from counting and return to the initial state, and Q = 0 makes the LED-D turn off and the AND door closes.
The operation of the device can be summarized as: the timing control circuit limits the time of the device's external output, the input conversion circuit provides the trigger condition for IC6, and the high level of IC6 during the temporary stability period, IC5 enters the temporary through the AND gate and Q1 The steady state allows IC7 and IC8 to oscillate during this period and output therapeutic electric pulses outward (click to enlarge).
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