Radiation monitoring equipment control circuit

Abstract

The utility model relates to the technical field of electronic lines of radiation monitoring equipment, in particular to a control circuit of radiation monitoring equipment, which comprises an infrared detection signal acquisition and processing module, a radiation detection signal acquisition and processing module, a singlechip and a signal output module, the infrared detection signal acquisition and processing module is used for acquiring an infrared detection signal, performing conversion and logic processing on the infrared detection signal and then transmitting the infrared detection signal to the single chip microcomputer; the radiation detection signal acquisition and processing module is used for acquiring radiation detection signals and transmitting the radiation detection signals to the single-chip microcomputer. The single chip microcomputer is used for receiving the radiation detection signal and the infrared detection signal for judgment and transmitting data to the signal output module; and the signal output module comprises an upper computer and an alarm device and is used for transmitting current radiation detection data and an alarm condition in real time. According to the utility model, a high-performance single-chip microcomputer is selected, an electronic circuit is simple and reliable in design, and the maintenance difficulty is effectively reduced by adopting direct insertion type packaging.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits of radiation monitoring equipment, in particular to a control circuit of radiation monitoring equipment. Background Art

[0002] The control module is not domestically produced and independently controllable. Many of its electronic components are foreign brands, making efficient procurement and subsequent maintenance difficult. The technology is outdated, using over ten types of integrated circuits and nearly twenty other electronic components. These chips have simple functions, resulting in an overly complex overall design and a high failure rate during operation. The existing electronic components used in the control module are no longer available for efficient procurement, making repairs difficult. Furthermore, the integrated chips are packaged directly onto the circuit board, making replacement difficult. Utility Model Content

[0003] The purpose of the utility model is to provide a radiation monitoring equipment control circuit to solve the problems in the prior art.

[0004] To achieve the above object, the present utility model provides the following technical solutions: a radiation monitoring equipment control circuit, the circuit comprising an infrared detection signal acquisition and processing module, a radiation detection signal acquisition and processing module, a single chip microcomputer and a signal output module;

[0005] The infrared detection signal acquisition and processing module includes a dual monostable multivibrator, a NOR gate, a NOT gate, and an adjustable resistor; the radiation detection signal acquisition and processing module includes a counter, a memory, a latch, a decoder, and a resistor; the signal output module includes a host computer and an alarm device; the alarm device includes a decoder, a NOT gate, a dual monostable multivibrator, a timer, a relay, and a resistor;

[0006] The infrared detection signal acquisition and processing module completes the acquisition of 8-channel infrared detection signals through the eight-channel infrared signal input port J2 and the 8-channel general VO port in the single-chip microcomputer, converts the acquired infrared detection signal into a square wave signal through the dual monostable multivibrator, and transmits it to the lower board OR gate; the lower board OR gate performs OR and NOT logic processing on the square wave signal transmitted by the dual monostable multivibrator, and then transmits the signal to the NOT gate; the NOT gate converts the signal into a high level and transmits it to the upper board OR and OR gate; the upper board OR gate performs OR and NOT logic processing on the input signal and then transmits the signal to the single-chip microcomputer; at the same time, the OR gate performs OR logic processing on the acquired NOT gate signal and then transmits it to the single-chip microcomputer;

[0007] Using dual monostable multivibrators and logic gates for signal processing can efficiently convert infrared detection signals into digital signals that can be processed by a single-chip microcomputer, thereby improving the reliability and accuracy of the signal.

[0008] The radiation detection signal acquisition and processing module is connected to the five counters in the single-chip microcomputer through the ten-channel counting pulse input port J1, and records the radiation detection signals collected in 10 units of time. Among them, the eight-channel digital signal output end is connected in parallel with the memory and the latch to expand the memory of the single-chip microcomputer. After the decoder input end receives the signal from the single-chip microcomputer, it is connected to the CS port of the counter through the single-chip microcomputer. The decoder output end inputs a chip select signal to the counter, completing the transmission of radiation detection data from the counter to the single-chip microcomputer.

[0009] By using memory, latches and decoders to process radiation detection signals, multiple signals can be processed simultaneously, ensuring the comprehensiveness and accuracy of data collection.

[0010] The program download circuit is composed of a single-chip computer downloader CH340G, a USB interface J4, a connector J5, a resistor R1, a resistor R2, a transistor Q1, a transistor Q2, a steady-state diode D5, a diode D6, a capacitor C5, a capacitor C6, a capacitor C7 and a capacitor C8.

[0011] The MCU downloader CH340G includes 16 pins, namely GND pin No. 1, TxD pin No. 2, RxD pin No. 3, V3 pin No. 4, D+ pin No. 5, D- pin No. 6, XI pin No. 7, XO pin No. 8, CTS# pin No. 9, DSR# pin No. 10, RI# pin No. 11, DCD# pin No. 12, DTR# pin No. 13, RTS# pin No. 14, R232 pin No. 15 and VCC pin No. 16; the USB interface J4 includes 4 pins, namely VCC pin No. 1, D- pin No. 2, D+ pin No. 3 and GND pin No. 4; the connector J5 includes four connection ports, namely U-V5 connection port No. 1, RxA / B connection port No. 2, TxA / B connection port No. 3 and connection port No. 4;

[0012] The transistor Q1 is B772M, Q2 is SS8050; the steady-state diode D5 is SMB5817; the diode D6 is 1N40067;

[0013] The No. 1 GND pin and No. 4 V3 pin of the single-chip computer downloader CH340G are connected in parallel with capacitor C6 and then grounded. The No. 1 GND pin and No. 16 VCC pin of the single-chip computer downloader CH340G are connected in parallel with capacitor C5, and then connected in parallel with resistor R2 and capacitor C7 with No. 14 RTS# pin, and then connected in parallel with transistor Q1, resistor R1 and transistor Q2 in series, and then connected in parallel with diode D6 and capacitor C8 in sequence, and then one end is connected to the power supply and the other end is grounded; Connect the No. 2 TxD pin of the CH340G microcontroller to the No. 2 RxA / B connector of the J5 connector in series with the steady-state diode D5; connect the No. 3 RxD pin of the CH340G microcontroller to the No. 3 TxA / B connector of the J5 connector; connect the No. 5 D+ pin of the CH340G microcontroller to the No. 3 D+ pin of the USB interface J4; connect the No. 6 D- pin of the CH340G microcontroller to the No. 2 D- pin of the USB interface;

[0014] The VCC pin 1 of the USB interface J4 is connected to the power supply, and the GND pin 4 is grounded;

[0015] The No. 2 RxA / B connector and No. 3 TxA / B connector of the connector J5 are connected to the microcontroller STC15W4K32S4, the No. 1 U-V5 connector is connected to the power supply, and the No. 4 connector is connected to the ground;

[0016] Using the CH340G MCU downloader simplifies the program download process, making the entire development and debugging process more efficient and convenient; the USB interface J4 has a fast transmission speed, which can quickly upload and download MCU programs and data, improving development and debugging efficiency.

[0017] The circuit for communicating with the host computer is composed of a transceiver MAX232, a port P1 for communicating with the host computer, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4 and a capacitor C9.

[0018] The host computer communication port P1 includes 8 pins, namely, No. 1 DCD pin, No. 2 RXD pin, No. 3 TXD pin, No. 4 DTR pin, No. 6 DSR pin, No. 7 RTS pin, No. 8 CTS pin and No. 9 RI pin; the transceiver MAX232 includes 14 pins, namely, No. 1 C1+ pin, No. 2 VS+ pin, No. 3 C1- pin, No. 4 C2+ pin, No. 5 C2- pin, No. 6 VS- pin, No. 7 T2OUT pin, No. 8 R2IN pin, No. 9 R2OUT pin, No. 10 T2IN pin, No. 11 T1IN pin, No. 12 R1OUT pin, No. 13 R1IN pin and No. 14 T1OUT pin;

[0019] The No. 1 C1+ pin and the No. 3 C1- pin of the transceiver MAX232 are connected in parallel with a capacitor C1, the No. 4 C2+ pin and the No. 5 C2- pin of the transceiver MAX232 are connected in parallel with a capacitor C2, the No. 2 VS+ pin of the transceiver MAX232 and the capacitor C4 are connected in series with the No. 6 VS- pin and the capacitor C3, and a capacitor C9 is connected in parallel, one end of the capacitor C9 and the capacitor C4 is connected to a power supply, and the other end is grounded; the No. 11 T1IN pin and the No. 12 R1OUT pin of the transceiver MAX232 are connected to the single-chip microcomputer STC15W4K32S4; the No. 13 R1IN pin of the transceiver MAX232 is connected to the No. 7 RTS pin of the host computer communication port; the No. 14 T1OUT pin of the transceiver MAX232 is connected to the No. 3 TXD pin of the host computer communication port;

[0020] The use of transceiver MAX232 ensures a stable communication connection with the host computer, can reliably transmit data, and reduces communication error and loss rates.

[0021] The alarm device includes: the single chip microcomputer completes 8-way signal output through a decoder, one of the 8-way signal is connected to the input of a NOT gate, the corresponding output signal of the NOT gate is converted into a square wave signal by a dual monostable multivibrator, transmitted to the timer for widening, and then transmitted to the relay for controlling the connection and blocking of the relay, thereby completing the alarm triggering function of the alarm device;

[0022] Through the combination of the NOT gate, the astable multivibrator and the relay, the detected abnormal signal can be responded to quickly, thereby improving the timeliness and reliability of the alarm device.

[0023] The alarm device consists of an alarm relay RL1 and a connector J3; one end of the alarm relay RL1 is connected to the two connection ports of the connector J3, and one end is grounded and connected to the microcontroller; the alarm relay usually has good electrical isolation capability, which can effectively isolate the electrical interference between the alarm signal and the receiving device, ensuring the stability and reliability of the signal.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. This utility model uses domestic high-performance single-chip microcomputer STC15W4K32S4, which has high speed, low power consumption and does not require an external crystal oscillator;

[0026] 2. The components used in this utility model are all domestically produced and independently controlled, which makes it easy to purchase and replenish, and can effectively reduce the difficulty of maintenance and shorten the maintenance cycle;

[0027] 3. The utility model adopts 3-type 4-chip integrated chips, which are significantly fewer in number and type than the original circuit with 12-type 28 chips. Other peripheral components are also significantly fewer than the original circuit. The electronic circuit is clear and concise, effectively reducing the links where possible failures may occur.

[0028] 4. The utility model uses a small number of chips, which greatly reduces the heat dissipation of the control module, slows down the aging of components, and saves resources and costs;

[0029] 5. The utility model adopts direct plug-in packaging, which allows direct plug-in and replacement of chips, reducing the difficulty of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a program download circuit for a radiation monitoring device control circuit of the utility model;

[0031] Figure 2 This is a host computer communication circuit for a radiation monitoring device control circuit of the utility model;

[0032] Figure 3 This is an alarm signal output circuit for a radiation monitoring device control circuit of the utility model;

[0033] Figure 4 This is a single chip microcomputer circuit for a radiation monitoring device control circuit of the utility model;

[0034] Figure 5 This is an 8-way infrared signal input port for the control circuit of a radiation monitoring device of the utility model;

[0035] Figure 6 This is a 10-channel counting pulse input port of a radiation monitoring device control circuit of the utility model;

[0036] Figure 7 This is a flow chart of a control circuit of a radiation monitoring device according to the present invention. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] See also Figures 1 to 7 ,In an embodiment of the utility model, a radiation monitoring equipment control circuit includes an infrared detection signal acquisition and processing module, a radiation detection signal acquisition and processing module, a single-chip microcontroller, and a signal output module;

[0039] The infrared detection signal acquisition and processing module includes a dual monostable multivibrator, a NOR gate, a NOT gate, and an adjustable resistor; the radiation detection signal acquisition and processing module includes a counter, a memory, a latch, a decoder, and a resistor; the signal output module includes a host computer and an alarm device; the alarm device includes a decoder, a NOT gate, a dual monostable multivibrator, a timer, a relay, and a resistor;

[0040] The infrared detection signal acquisition and processing module completes the acquisition of 8-channel infrared detection signals through the eight-channel infrared signal input port J2 and the 8-channel general VO port in the single-chip microcomputer, converts the acquired infrared detection signal into a square wave signal through the dual monostable multivibrator, and transmits it to the lower board OR gate; the lower board OR gate performs OR and NOT logic processing on the square wave signal transmitted by the dual monostable multivibrator, and then transmits the signal to the NOT gate; the NOT gate converts the signal into a high level and transmits it to the upper board OR and OR gate; the upper board OR gate performs OR and NOT logic processing on the input signal and then transmits the signal to the single-chip microcomputer; at the same time, the OR gate performs OR logic processing on the acquired NOT gate signal and then transmits it to the single-chip microcomputer;

[0041] Using dual monostable multivibrators and logic gates for signal processing can efficiently convert infrared detection signals into digital signals that can be processed by a single-chip microcomputer, thereby improving the reliability and accuracy of the signal.

[0042] The radiation detection signal acquisition and processing module is connected to the five counters in the single-chip microcomputer through the ten-channel counting pulse input port J1, and records the radiation detection signals collected in 10 units of time. Among them, the eight-channel digital signal output end is connected in parallel with the memory and the latch to expand the memory of the single-chip microcomputer. After the decoder input end receives the signal from the single-chip microcomputer, it is connected to the CS port of the counter through the single-chip microcomputer. The decoder output end inputs a chip select signal to the counter, completing the transmission of radiation detection data from the counter to the single-chip microcomputer.

[0043] By using memory, latches and decoders to process radiation detection signals, multiple signals can be processed simultaneously, ensuring the comprehensiveness and accuracy of data collection.

[0044] The single-chip microcomputer is written with a single-chip microcomputer program through a program download circuit, and the single-chip microcomputer program is used to receive radiation detection signals and infrared detection signals for judgment, and transmit the data to the signal output module through a communication circuit with a host computer;

[0045] The program download circuit is composed of a single-chip computer downloader CH340G, a USB interface J4, a connector J5, a resistor R1, a resistor R2, a transistor Q1, a transistor Q2, a steady-state diode D5, a diode D6, a capacitor C5, a capacitor C6, a capacitor C7 and a capacitor C8.

[0046] The MCU downloader CH340G includes 16 pins, namely GND pin No. 1, TxD pin No. 2, RxD pin No. 3, V3 pin No. 4, D+ pin No. 5, D- pin No. 6, XI pin No. 7, XO pin No. 8, CTS# pin No. 9, DSR# pin No. 10, RI# pin No. 11, DCD# pin No. 12, DTR# pin No. 13, RTS# pin No. 14, R232 pin No. 15 and VCC pin No. 16; the USB interface J4 includes 4 pins, namely VCC pin No. 1, D- pin No. 2, D+ pin No. 3 and GND pin No. 4; the connector J5 includes four connection ports, namely U-V5 connection port No. 1, RxA / B connection port No. 2, TxA / B connection port No. 3 and connection port No. 4;

[0047] The transistor Q1 is B772M, Q2 is SS8050; the steady-state diode D5 is SMB5817; the diode D6 is 1N40067;

[0048] The No. 1 GND pin and No. 4 V3 pin of the single-chip computer downloader CH340G are connected in parallel with capacitor C6 and then grounded. The No. 1 GND pin and No. 16 VCC pin of the single-chip computer downloader CH340G are connected in parallel with capacitor C5, and then connected in parallel with resistor R2 and capacitor C7 with No. 14 RTS# pin, and then connected in parallel with transistor Q1, resistor R1 and transistor Q2 in series, and then connected in parallel with diode D6 and capacitor C8 in sequence, and then one end is connected to the power supply and the other end is grounded; Connect the No. 2 TxD pin of the CH340G microcontroller to the No. 2 RxA / B connector of the J5 connector in series with the steady-state diode D5; connect the No. 3 RxD pin of the CH340G microcontroller to the No. 3 TxA / B connector of the J5 connector; connect the No. 5 D+ pin of the CH340G microcontroller to the No. 3 D+ pin of the USB interface J4; connect the No. 6 D- pin of the CH340G microcontroller to the No. 2 D- pin of the USB interface;

[0049] Using the MCU downloader CH340G simplifies the program download process, making the entire development and debugging process more efficient and convenient;

[0050] The VCC pin 1 of the USB interface J4 is connected to the power supply, and the GND pin 4 is grounded;

[0051] The No. 2 RxA / B connector and No. 3 TxA / B connector of the connector J5 are connected to the microcontroller STC15W4K32S4, the No. 1 U-V5 connector is connected to the power supply, and the No. 4 connector is grounded.

[0052] The signal output module, after receiving the data through the upper-machine position communication circuit, transmits the current radiation detection data to the upper-machine position in real time and transmits the alarm information to the alarm device;

[0053] The circuit for communicating with the host computer is composed of a transceiver MAX232, a port P1 for communicating with the host computer, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4 and a capacitor C9.

[0054] The host computer communication port P1 includes 8 pins, namely, No. 1 DCD pin, No. 2 RXD pin, No. 3 TXD pin, No. 4 DTR pin, No. 6 DSR pin, No. 7 RTS pin, No. 8 CTS pin and No. 9 RI pin; the transceiver MAX232 includes 14 pins, namely, No. 1 C1+ pin, No. 2 VS+ pin, No. 3 C1- pin, No. 4 C2+ pin, No. 5 C2- pin, No. 6 VS- pin, No. 7 T2OUT pin, No. 8 R2IN pin, No. 9 R2OUT pin, No. 10 T2IN pin, No. 11 T1IN pin, No. 12 R1OUT pin, No. 13 R1IN pin and No. 14 T1OUT pin;

[0055] The No. 1 C1+ pin and the No. 3 C1- pin of the transceiver MAX232 are connected in parallel with a capacitor C1, the No. 4 C2+ pin and the No. 5 C2- pin of the transceiver MAX232 are connected in parallel with a capacitor C2, the No. 2 VS+ pin of the transceiver MAX232 and the capacitor C4 are connected in series with the No. 6 VS- pin and the capacitor C3, and a capacitor C9 is connected in parallel, one end of the capacitor C9 and the capacitor C4 is connected to a power supply, and the other end is grounded; the No. 11 T1IN pin and the No. 12 R1OUT pin of the transceiver MAX232 are connected to the single-chip microcomputer STC15W4K32S4; the No. 13 R1IN pin of the transceiver MAX232 is connected to the No. 7 RTS pin of the host computer communication port P1; the No. 14 T1OUT pin of the transceiver MAX232 is connected to the No. 3 TXD pin of the host computer communication port;

[0056] The use of transceiver MAX232 ensures a stable communication connection with the host computer, can reliably transmit data, and reduces communication error and loss rates.

[0057] The alarm device includes: the single chip microcomputer completes 8-way signal output through a decoder, one of the 8-way signal is connected to the input of a NOT gate, the corresponding output signal of the NOT gate is converted into a square wave signal by a dual monostable multivibrator, transmitted to the timer for widening, and then transmitted to the relay for controlling the connection and blocking of the relay, thereby completing the alarm triggering function of the alarm device;

[0058] Through the combination of the NOT gate, the astable multivibrator and the relay, the detected abnormal signal can be responded to quickly, thereby improving the timeliness and reliability of the alarm device.

[0059] The alarm device is composed of an alarm relay RL1 and a connector J3; one end of the alarm relay RL1 is connected to two connection ports of the connector J3, and one end is grounded and connected to the single chip microcomputer.

[0060] The working principle of this utility model is:

[0061] The eight-channel infrared detection signal is collected through the eight-channel infrared signal input port J2 and the eight-channel general VO port in the single-chip microcomputer STC15W4K32S4. The dual monostable multivibrator uses a bistable circuit to generate a periodic square wave signal. The converted square wave signal is transmitted to the lower board OR gate for logic processing. The NOT gate converts the signal into a high-level signal and transmits it to the upper board OR gate and OR gate.

[0062] The ten-channel counting pulse input port J1 is connected to the five counters in the microcontroller STC15W4K32S4 to record the radiation detection signals collected in 10 units of time. After the collected signals are processed, they receive the microcontroller signal through the decoder input end to control the chip select signal of the counter, thereby completing the transmission of radiation detection data and expanding the microcontroller memory through the memory and latch.

[0063] Using the microcontroller downloader CH340G and connecting it to the computer through the USB interface simplifies the downloading and updating process of the microcontroller program; the microcontroller is responsible for receiving and processing infrared detection signals and radiation detection signals, and transmitting the processed data through the communication circuit with the host computer. Capacitors, resistors, diodes and transistors ensure the stability and reliability of signal transmission and processing.

[0064] The MAX232 transceiver is used to communicate radiation monitoring data and alarm information with the host computer. Capacitors are connected to the pins to stabilize the operating voltage and signal transmission. The communication is stable and reliable, and it is easy to set up and debug.

[0065] The alarm system is controlled by a single-chip microcomputer, which monitors and responds to abnormal signals through a decoder and a NOT gate. The microcontroller controls eight signal outputs, one of which is connected to the NOT gate input. The NOT gate output signal is converted to a square wave signal by an astable multivibrator. This square wave signal is then stretched by a timer and drives a relay, controlling its on / off state and completing the alarm function.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A radiation monitoring device control circuit, characterized in that: The circuit includes an infrared detection signal acquisition and processing module, a radiation detection signal acquisition and processing module, a single chip microcomputer and a signal output module; The infrared detection signal acquisition and processing module includes a dual monostable multivibrator, a NOR gate, a NOT gate and an adjustable resistor; The radiation detection signal acquisition and processing module includes a counter, a memory, a latch, a decoder and a resistor; The signal output module includes a host computer and an alarm device; The alarm device includes a decoder, a NOT gate, a dual monostable multivibrator, a timer, a relay and a resistor; The infrared detection signal acquisition and processing module completes the acquisition of 8-channel infrared detection signals through the 8-channel general VO ports in the single-chip microcomputer, and converts the infrared detection signals into square wave signals in the single-chip microcomputer, and performs NOR gate and OR gate logic processing; the radiation detection signal acquisition and processing module completes the acquisition of 10-channel radiation detection signals through 5 counters in the single-chip microcomputer; the single-chip microcomputer program is written into the single-chip microcomputer through the program download circuit, and the single-chip microcomputer program is used to receive radiation detection signals and infrared detection signals for judgment, and transmit the data to the signal output module through the communication circuit with the host computer; the signal output module includes a host position and an alarm device, which is used to transmit current radiation detection data and alarm conditions in real time.

2. A radiation monitoring equipment control circuit according to claim 1, characterized in that: The infrared detection signal acquisition and processing module completes the acquisition of 8-channel infrared detection signals through the eight-channel infrared signal input port J2 and the 8-channel general VO ports in the single-chip microcomputer, converts the acquired infrared detection signals into square wave signals through the dual monostable multivibrator, and transmits them to the OR gate of the lower board; the OR gate of the lower board performs OR and NOT logic processing on the square wave signals transmitted by the dual monostable multivibrator, and then transmits the signals to the NOT gate; the NOT gate converts the signals into a high level and then transmits them to the OR and OR gate of the upper board; the OR gate of the upper board performs OR and NOT logic processing on the input signals and then transmits the signals to the single-chip microcomputer; at the same time, the OR gate performs OR logic processing on the acquired NOT gate signals and then transmits them to the single-chip microcomputer.

3. The radiation monitoring device control circuit according to claim 1, characterized in that: The radiation detection signal acquisition and processing module is connected to the five counters in the single-chip microcomputer through the ten-channel counting pulse input port J1, and records the 10-channel radiation detection signals collected within a unit time. Among them, the 8-channel digital signal output end is connected in parallel with the memory and the latch to expand the single-chip microcomputer memory. After the decoder input end receives the single-chip microcomputer signal, it is connected to the CS port of the counter through the single-chip microcomputer. The decoder output end inputs a chip select signal to the counter to complete the transmission of radiation detection data from the counter to the single-chip microcomputer.

4. A radiation monitoring equipment control circuit according to claim 1, characterized in that: The program download circuit is composed of a single-chip computer downloader CH340G, a USB interface J4, a connector J5, a resistor R1, a resistor R2, a transistor Q1, a transistor Q2, a steady-state diode D5, a diode D6, a capacitor C5, a capacitor C6, a capacitor C7 and a capacitor C8.

5. A radiation monitoring equipment control circuit according to claim 4, characterized in that: The MCU downloader CH340G includes 16 pins, namely GND pin No. 1, TxD pin No. 2, RxD pin No. 3, V3 pin No. 4, D+ pin No. 5, D- pin No. 6, XI pin No. 7, XO pin No. 8, CTS# pin No. 9, DSR# pin No. 10, RI# pin No. 11, DCD# pin No. 12, DTR# pin No. 13, RTS# pin No. 14, R232 pin No. 15 and VCC pin No. 16; the USB interface J4 includes 4 pins, namely VCC pin No. 1, D- pin No. 2, D+ pin No. 3 and GND pin No. 4; the connector J5 includes four connection ports, namely U-V5 connection port No. 1, RxA / B connection port No. 2, TxA / B connection port No. 3 and connection port No. 4; The No. 1 GND pin and No. 4 V3 pin of the single-chip computer downloader CH340G are connected in parallel with capacitor C6 and then grounded. The No. 1 GND pin and No. 16 VCC pin of the single-chip computer downloader CH340G are connected in parallel with capacitor C5, and then connected in parallel with resistor R2 and capacitor C7 with No. 14 RTS# pin, and then connected in parallel with transistor Q1, resistor R1 and transistor Q2 in series, and then connected in parallel with diode D6 and capacitor C8 in sequence, and then one end is connected to the power supply and the other end is grounded; Connect the TxD pin 2 of the CH340G MCU downloader in series with the steady-state diode D5 and then connect it to the RxA / B connector 2 of the J5 connector. Connect the RxD pin 3 of the CH340G MCU downloader to the TxA / B connector 3 of the J5 connector. Connect the D+ pin 5 of the CH340G MCU downloader to the D+ pin 3 of the USB interface. Connect the D- pin 6 of the CH340G MCU downloader to the D- pin 2 of the USB interface. The VCC pin 1 of the USB interface J4 is connected to the power supply, and the GND pin 4 is grounded; The No. 2 RxA / B connector and No. 3 TxA / B connector of the connector J5 are connected to the microcontroller STC15W4K32S4, the No. 1 U-V5 connector is connected to the power supply, and the No. 4 connector is grounded.

6. The radiation monitoring equipment control circuit according to claim 1, characterized in that: The circuit for communicating with the host computer is composed of a transceiver MAX232, a port P1 for communicating with the host computer, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4 and a capacitor C9.

7. A radiation monitoring equipment control circuit according to claim 6, characterized in that: The host computer communication port P1 includes 8 pins, namely, No. 1 DCD pin, No. 2 RXD pin, No. 3 TXD pin, No. 4 DTR pin, No. 6 DSR pin, No. 7 RTS pin, No. 8 CTS pin and No. 9 RI pin; the transceiver MAX232 includes 14 pins, namely, No. 1 C1+ pin, No. 2 VS+ pin, No. 3 C1- pin, No. 4 C2+ pin, No. 5 C2- pin, No. 6 VS- pin, No. 7 T2OUT pin, No. 8 R2IN pin, No. 9 R2OUT pin, No. 10 T2IN pin, No. 11 T1IN pin, No. 12 R1OUT pin, No. 13 R1IN pin and No. 14 T1OUT pin; The No. 1 C1+ pin and No. 3 C1- pin of the transceiver MAX232 are connected in parallel with capacitor C1, the No. 4 C2+ pin and No. 5 C2- pin of the transceiver MAX232 are connected in parallel with capacitor C2, the No. 2 VS+ pin of the transceiver MAX232 and capacitor C4 are connected in series with the No. 6 VS- pin and capacitor C3, and capacitor C9 is connected in parallel, one end of capacitor C9 connected to capacitor C4 is connected to a power supply, and the other end is grounded; the No. 11 T1IN pin and No. 12 R1OUT pin of the transceiver MAX232 are connected to the microcontroller STC15W4K32S4; the No. 13 R1IN pin of the transceiver MAX232 is connected to the No. 7 RTS pin of the host computer communication port P1; the No. 14 T1OUT pin of the transceiver MAX232 is connected to the No. 3 TXD pin of the host computer communication port.

8. The radiation monitoring equipment control circuit according to claim 1, characterized in that: The alarm device includes: the single chip microcomputer completes 8-way signal output through a decoder, one of the 8-way signals is connected to the NOT gate input, the corresponding output signal of the NOT gate is converted into a square wave signal by a dual monostable multivibrator, transmitted to the timer for widening, and then transmitted to the relay for controlling the connection and blocking of the relay, thereby completing the alarm triggering function of the alarm device.

9. The radiation monitoring equipment control circuit according to claim 8, characterized in that: The alarm device is composed of an alarm relay RL1 and a connector J3; one end of the alarm relay RL1 is connected to two connection ports of the connector J3, and one end is grounded and connected to the single chip microcomputer.

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