The remote control is mainly composed of a microprocessor chip that forms the remote control signal, a crystal oscillator, an amplification transistor, an infrared light emitting diode, and a keyboard matrix. Its working principle is as follows: infrared emission diode and emission integrated circuit. When you press the button, the emission integrated circuit will be programmed into instructions according to your requirements and emitted through the diode. When the game console receives the instructions, it will be transmitted to the integrated circuit for decoding, and then control the corresponding devices to execute actions. Thus, the positioning effect is achieved.

　　The locator is the main accessory of the regulating valve, usually used in conjunction with the pneumatic regulating valve. It receives the output signal of the regulator and then controls the pneumatic regulating valve with its output signal. When the regulating valve acts, the displacement of the valve stem is fed back to the locator through a mechanical device, and the valve position status is transmitted to the upper system through an electrical signal.

　　The locator is the main accessory of the control valve. It uses the valve stem displacement signal as the input feedback measurement signal, and the controller output signal as the set signal for comparison. When there is a deviation between the two, the output signal to the actuator is changed to make the actuator act, establishing a one-to-one correspondence between the valve stem displacement multiple and the controller output signal. Therefore, the positioner consists of a feedback control system with the valve stem displacement as the measurement signal and the controller output as the set signal. The operating variable of this control system is the output signal of the positioner to the actuator.

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