Airborne radioactive pollution monitoring system and its wireless transmission device

Abstract

This utility model relates to an air radioactive pollution monitoring system and its wireless transmission device. The device includes a conversion interface and a wireless transmission module. The conversion interface includes: an input port for connecting to the communication terminal of an air radioactive pollution monitor; a first communication port for connecting to a local display device of the air radioactive pollution monitor; a second communication port for acquiring the monitoring signal output by the air radioactive pollution monitor; and a power supply port for drawing power from the air radioactive pollution monitor. The wireless transmission module includes: a wireless communication circuit for transmitting monitoring signals; a data storage circuit for storing monitoring signals that were not transmitted or failed to be transmitted; a processing circuit connected to the second communication port, the wireless communication circuit, and the data storage circuit; and a voltage conversion circuit connected to the power supply port, the wireless communication circuit, the data storage circuit, and the processing circuit. This utility model can add wireless communication functionality to an air radioactive pollution monitor.

Description

Technical Field

[0001] This utility model relates to the field of wireless communication technology, and in particular to an air radioactive pollution monitoring system and its wireless transmission device. Background Technology

[0002] To ensure the safety of personnel, nuclear power plants need to monitor airborne radioactive pollution, requiring the installation of multiple airborne radioactive pollution monitors. While existing monitors support local measurement, display, and alarm functions, local alarms are susceptible to failure due to various factors such as equipment component malfunctions, environmental obstructions, noise interference, and personnel conditions. Furthermore, local alarm information requires manual transmission for event reporting, significantly hindering timely intervention. To prevent mass contamination and major internal contamination events, remote real-time data exchange between airborne radioactive pollution monitors is urgently needed. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an air radioactive pollution monitoring system and its wireless transmission device.

[0004] The technical solution adopted by this utility model to solve its technical problem is: to construct a wireless transmission device for an air radioactive pollution monitor, wherein the wireless transmission device includes a conversion interface and a wireless transmission module; The conversion interface includes: an input port for connecting to the communication terminal of the air radioactive pollution monitor; a first communication port connected to the input port for connecting to the local display device of the air radioactive pollution monitor; a second communication port connected to the input port for acquiring the monitoring signal output by the air radioactive pollution monitor; and a power supply port connected to the input port for drawing power from the air radioactive pollution monitor. The wireless transmission module includes: a wireless communication circuit for transmitting the monitoring signal; a data storage circuit for storing the monitoring signals that were not transmitted or failed to be transmitted; a processing circuit connected to the second communication port, the wireless communication circuit, and the data storage circuit; and a voltage conversion circuit connected to the power supply port, the wireless communication circuit, the data storage circuit, and the processing circuit for supplying power to each circuit.

[0005] Preferably, the voltage conversion circuit includes a wide voltage conversion unit and a linear voltage regulation unit; The wide voltage conversion unit is connected to the power supply port and the wireless communication circuit to draw power from the communication terminal of the air radioactive pollution monitor and output a first voltage; and The linear voltage regulator unit is connected to the wide voltage conversion unit, the data storage circuit, and the processing circuit to convert the first voltage into a second voltage.

[0006] Preferably, the wide voltage conversion unit includes a switch control chip U1, a first diode D1, a first resistor R1, a fifth resistor R5, a sixth capacitor C6, a second diode D2, a first inductor L1, a second capacitor C2, a second resistor R2, and a third resistor R3; The power supply terminal of the switch control chip U1 is connected to the cathode of the first diode D1, and the anode of the first diode D1 is connected to the power extraction port. The power supply terminal of the switch control chip U1 is connected to the enable terminal of the switch control chip U1 via the first resistor R1. The enable terminal of the switch control chip U1 is grounded via the fifth resistor R5. The power supply terminal of the switch control chip U1 is also grounded via the sixth capacitor C6. The open-drain output terminal of the switch control chip U1 is connected to the cathode of the second diode D2 and the first terminal of the first inductor L1. The anode of the second diode D2 is grounded. The second terminal of the first inductor L1 is connected to the linear voltage regulator unit and the wireless communication circuit. One path of the second terminal of the first inductor L1 is grounded via the second capacitor C2, and the other path is grounded via the second resistor R2 and the third resistor R3. The node after the second resistor R2 and the third resistor R3 are connected is connected to the feedback terminal of the switch control chip U1.

[0007] Preferably, the linear voltage regulator unit includes a linear voltage regulator U2, a twelfth capacitor C12, and a fourteenth capacitor C14; the power supply terminal of the linear voltage regulator U2 is connected to the wide voltage conversion unit, the power supply terminal of the linear voltage regulator U2 is grounded through the twelfth capacitor C12, the output terminal of the linear voltage regulator U2 is connected to the data storage circuit and the processing circuit, and the output terminal of the linear voltage regulator U2 is grounded through the fourteenth capacitor C14.

[0008] Preferably, the wireless communication circuit includes a wireless communication chip, a SIM card connection unit, a filtering circuit, and an antenna; The SIM card communication port group of the wireless communication chip is connected to the SIM card connection unit, the SIM card connection unit is used to access the SIM card, the radio frequency control terminal of the wireless communication chip is connected to the antenna through the filtering circuit, and the serial communication port group of the wireless communication chip is connected to the processing circuit.

[0009] Preferably, the wireless communication circuit further includes a first bus transceiver U5, a second bus transceiver U6, a power control unit, several instruction receiving units, and several instruction output units; The B power supply terminal of the first bus transceiver U5 and the A power supply terminal of the second bus transceiver U6 are connected to the communication power output terminal of the wireless communication chip. The A power supply terminal of the first bus transceiver U5 and the B power supply terminal of the second bus transceiver U6 are connected to the voltage conversion circuit. The A terminal of the first bus transceiver U5 is connected to the wireless communication control receiving terminal of the processing circuit. The B terminal of the first bus transceiver U5 is connected to the wireless communication control transmitting terminal of the wireless communication chip. The A terminal of the second bus transceiver U6 is connected to the wireless communication control receiving terminal of the wireless communication chip. The B terminal of the second bus transceiver U6 is connected to the wireless communication control transmitting terminal of the processing circuit. The input terminal of the power control unit is connected to the voltage conversion circuit, the output terminal of the power control unit is connected to the power supply terminal of the wireless communication chip, and the control terminal of the power control unit is connected to the processing circuit. The first end of each instruction receiving unit is connected to each instruction receiving end of the wireless communication chip, the second end of each instruction receiving unit is grounded, and the control end of each instruction receiving unit is connected to each preset instruction output end of the processing circuit. The first terminal of each instruction output unit is connected to each preset instruction receiving terminal of the processing circuit, the second terminal of each instruction output unit is grounded, and the control terminal of each instruction output unit is connected to each instruction output terminal of the wireless communication chip.

[0010] Preferably, each instruction receiving unit includes a first NMOS transistor Q1 and a sixteenth resistor R16. The drain of the first NMOS transistor Q1 is connected to the instruction receiving terminal of the wireless communication chip, the source of the first NMOS transistor Q1 is grounded, the gate of the first NMOS transistor Q1 is connected to the preset instruction output terminal of the processing circuit, and the gate of the first NMOS transistor Q1 is also grounded through the sixteenth resistor R16. Each instruction output unit includes a sixth NMOS transistor Q6, a twenty-seventh resistor R27, and a thirty-second resistor R32. The drain of the sixth NMOS transistor Q6 is connected to the preset instruction receiving terminal of the processing circuit. The drain of the sixth NMOS transistor Q6 is connected to the voltage conversion circuit via the twenty-seventh resistor R27. The source of the sixth NMOS transistor Q6 is grounded. The gate of the sixth NMOS transistor Q6 is connected to the instruction output terminal of the wireless communication chip via the thirty-second resistor R32.

[0011] Preferably, the power control unit includes a first PMOS transistor Q4, a forty-second capacitor C42, a forty-fourth capacitor C44, a twenty-sixth resistor R26, a fifth NMOS transistor Q5, and a thirty-fifth resistor R35; The source of the first PMOS transistor Q4 is connected to the voltage conversion circuit, the first terminal of the forty-second capacitor C42, and the first terminal of the twenty-sixth resistor R26. The second terminal of the forty-second capacitor C42 is grounded. The second terminal of the twenty-sixth resistor R26 is connected to the gate of the first PMOS transistor Q4. The gate of the first PMOS transistor Q4 is connected to the drain of the fifth NMOS transistor Q5. The source of the fifth NMOS transistor Q5 is grounded. The gate of the fifth NMOS transistor Q5 is connected to the processing circuit. The gate of the fifth NMOS transistor Q5 is grounded through the thirty-fifth resistor R35. The drain of the first PMOS transistor Q4 is grounded through the forty-fourth capacitor C44. The drain of the first PMOS transistor Q4 is connected to the power supply terminal of the wireless communication chip.

[0012] Preferably, the conversion interface further includes a communication switch, the common terminal of which is connected to the input port, and the first and second output terminals of which are respectively connected to the first and second communication ports. The communication switch is used to control the common terminal to connect to the first output terminal or to connect the common terminal to the second output terminal according to the operation.

[0013] This utility model also constructs an air radioactive pollution monitoring system, including: Multiple air radioactive pollution monitoring instruments; The aforementioned multiple wireless transmission devices, each corresponding to one of the aforementioned air radioactive pollution monitors; and A server that is communicatively connected to each of the aforementioned wireless transmission devices.

[0014] The implementation of this utility model has the following beneficial effects: it can add wireless communication function to the air radioactive pollution monitor, so that the air radioactive pollution monitor can transmit the sensed information through wireless communication to realize remote real-time data interaction, thereby improving the timeliness and alarm effect of radioactive pollution alarm, and ensuring the personal safety of staff when working on site. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a circuit structure block diagram of the wireless transmission device in some embodiments of this utility model; Figure 2 This is a circuit diagram of the wide voltage conversion unit in some embodiments of this utility model; Figure 3 This is a circuit diagram of the linear voltage regulator unit in some embodiments of this utility model; Figure 4 This is a circuit diagram of the wireless communication circuit in some embodiments of this utility model; Figure 5 This is a circuit diagram of the SIM card connection unit in some embodiments of this utility model; Figure 6 This is a circuit diagram of the first bus transceiver U5 and the second bus transceiver U6 in some embodiments of this utility model; Figure 7 This is a circuit diagram of the power control unit in some embodiments of this utility model; Figure 8 This is a circuit diagram of the instruction receiving unit in some embodiments of this utility model; Figure 9 This is a circuit diagram of the instruction output unit in some embodiments of this utility model. Detailed Implementation

[0016] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0017] In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "up," "down," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] Figure 1 This is a circuit structure block diagram of the wireless transmission device in some embodiments of this utility model. The wireless transmission device is applied to an airborne radioactive pollution monitor, which can add wireless communication functionality to existing airborne radioactive pollution monitors in nuclear power plants. This allows the airborne radioactive pollution monitor to transmit sensed information wirelessly, enabling remote real-time data interaction, thereby improving the timeliness and effectiveness of radioactive pollution alarms and ensuring the personal safety of personnel working on-site.

[0019] like Figure 1 As shown, the wireless transmission device includes a conversion interface 1 and a wireless transmission module 2.

[0020] The conversion interface 1 may include an input port 11, a first communication port 12, a second communication port 13, and a power supply port 14.

[0021] Input port 11 is used to connect to the communication input port 11 of the air radioactive pollution monitor to obtain the monitoring signal output by the air radioactive pollution monitor, which can represent the air radioactive pollution dose, and to draw power from the communication line of the air radioactive pollution monitor. The interface model of input port 11 is consistent with the interface model of the local display device of the air radioactive pollution monitor, such as DB9 interface.

[0022] The first communication port 12 connects to the input port 11. The first communication port 12 is used to connect to the local display device of the air radioactive pollution monitor to acquire and send monitoring signals to the local display device, enabling the local display device to display the magnitude of the air radioactive pollution dose based on the monitoring signals. It should be noted that the local display device refers to a display installed at the site where the air radioactive pollution monitor is located. The interface of the first communication port 12 only needs to be compatible with the interface of the local display device; for example, if the interface of the local display device is a DB9 female connector, then the first communication port 12 is a DB9 male connector.

[0023] The second communication port 13 is connected to the input port 11. The second communication port 13 is used to acquire the monitoring signal output by the air radioactive pollution monitor and send it to the processing circuit 23.

[0024] Power port 14 is connected to input port 11 and is used to draw power from the air radioactive pollution monitor. Specifically, power port 14 is connected to the power supply line in input port 11, and it is sufficient to obtain a stable DC power supply from the air radioactive pollution monitor.

[0025] Please see Figure 1 The wireless transmission module 2 may include a wireless communication circuit 21, a data storage circuit 22, a processing circuit 23, and a voltage conversion circuit 24.

[0026] The wireless communication circuit 21 is used to emit monitoring signals in the form of electromagnetic waves, enabling the server to obtain the monitoring signals through a preset wireless communication network. The wireless communication network can be constructed using wireless technologies such as 4G, 5G, and WiFi.

[0027] The data storage circuit 22 is used to store monitoring signals that were not transmitted or failed to be transmitted. Since monitoring signals are affected by factors such as wireless network fluctuations, transmission failure is possible. Therefore, the data storage circuit 22 needs to store failed monitoring signals so that the transmission can be retried after network communication is restored. During communication failures, the amount of monitoring signal data accumulates. Therefore, the data storage circuit 22 is also used to store all monitoring signals during the communication failure period to prevent data loss. After network communication is restored, the monitoring signals are transmitted via the wireless communication circuit 21.

[0028] The processing circuit 23 is connected to the second communication port 13, the wireless communication circuit 21 and the data storage circuit 22. The processing circuit 23 is used to obtain monitoring signals from the second communication port 13 and store them in the data storage circuit 22. At the same time, it controls the wireless communication circuit 21 to send monitoring signals wirelessly. After the monitoring signals are successfully sent to the server, it also clears the relevant data in the data storage circuit 22.

[0029] The voltage conversion circuit 24 is connected to the power input port 14, the wireless communication circuit 21, the data storage circuit 22, and the processing circuit 23. The voltage conversion circuit 24 is used to draw power from the air radioactive pollution monitor through the power input port 14 and the input port 11 to power the wireless communication circuit 21, the data storage circuit 22, and the processing circuit 23.

[0030] In some embodiments, the voltage conversion circuit 24 may include a wide voltage conversion unit and a linear voltage regulator unit.

[0031] The wide voltage conversion unit is connected to the power input port 14 and the wireless communication circuit 21. The wide voltage conversion unit is used to draw power from the communication terminal of the air radioactive pollution monitor and output a first voltage to power the wireless communication circuit 21.

[0032] In some embodiments, such as Figure 2 As shown, the wide voltage conversion unit may include a switch control chip U1, a first diode D1, a first resistor R1, a fifth resistor R5, a sixth capacitor C6, a second diode D2, a first inductor L1, a second capacitor C2, a second resistor R2, and a third resistor R3. The power supply terminal of the switch control chip U1 is connected to the cathode of the first diode D1, and the anode of the first diode D1 is connected to the power supply port 14. The power supply terminal of the switch control chip U1 is connected to the enable terminal of the switch control chip U1 through the first resistor R1. The enable terminal of the switch control chip U1 is grounded through the fifth resistor R5. The power supply terminal of the switch control chip U1 is also grounded through the sixth capacitor C6. The open-drain output terminal of the switch control chip U1 is connected to the cathode of the second diode D2 and the first terminal of the first inductor L1. The anode of the second diode D2 is grounded. The second terminal of the first inductor L1 is connected to the linear voltage regulator unit and the wireless communication circuit 21. One path of the second terminal of the first inductor L1 is grounded through the second capacitor C2, and the other path is grounded through the second resistor R2 and the third resistor R3. The node after the second resistor R2 and the third resistor R3 are connected is connected to the feedback terminal of the switch control chip U1.

[0033] In this embodiment, the switch control chip U1, the first diode D1, the first resistor R1, the fifth resistor R5, the sixth capacitor C6, the second diode D2, the first inductor L1, the second capacitor C2, the second resistor R2, and the third resistor R3 constitute a switching power supply circuit. The magnitude of the first voltage can be adjusted by adjusting the resistance values ​​of the second resistor R2 and the third resistor R3. Furthermore, the first diode D1 prevents negative voltage signals from being input to the switch control chip U1. The switch control chip U1 can be a TPS54332DDA. Since the voltage output of the communication terminal of different models of air radioactive pollution monitors in nuclear power plants may vary, the input voltage of the wide voltage conversion unit can be from 4.2V to 36V, capable of converting the input voltage obtained from the air radioactive pollution monitor into a stable first voltage VCC_4V2.

[0034] Furthermore, such as Figure 2 As shown, the wide voltage conversion unit may further include a second inductor L2, a first capacitor C1, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a sixth resistor R6, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a fourth resistor R4, and a first protection diode ED1. The second inductor L2 is connected in series between the cathode of the first diode D1 and the power supply terminal of the switch control chip U1, serving as a filter. The seventh capacitor C7 and the eighth capacitor C8 are connected in parallel with the sixth capacitor C6, forming a filter circuit 212 with better filtering effect, retaining the filtering of low-frequency and high-frequency noise. The ninth capacitor C9 is connected between the soft-start terminal of the switch control chip U1 and ground, serving as a filter. The capacitor pump connection terminal of the switch control chip U1 is connected to the open-drain output terminal of the switch control chip U1 via the first capacitor C1. The error amplifier compensation terminal of the switch control chip U1 is grounded via the eleventh capacitor C11 and via the tenth capacitor C10 and the sixth resistor R6. The third capacitor C3, the fourth capacitor C4, and the fifth capacitor C5 are connected in parallel with the second capacitor C2, forming a filter circuit 212 with better filtering effect. The first terminal of the first inductor L1 is also grounded through the fourth resistor R4, which can act as a dummy load to prevent the wide voltage conversion unit from being unloaded. The first terminal of the first inductor L1 is also grounded through the first protection tube ED1, which can be an ESD tube to prevent static electricity.

[0035] The linear voltage regulator unit is connected to the wide voltage conversion unit, the data storage circuit 22, and the processing circuit 23. The linear voltage regulator unit converts the first voltage into a second voltage, which then powers the data storage circuit 22 and the processing circuit 23. On the one hand, the linear voltage regulator unit converts the voltage value of the first voltage; on the other hand, it utilizes the characteristics of low ripple and high precision of linear voltage regulators to provide a more accurate and stable power supply to the data storage circuit 22 and the processing circuit 23.

[0036] In some embodiments, such as Figure 3 As shown, the linear regulator unit includes a linear regulator U2, a twelfth capacitor C12, and a fourteenth capacitor C14. The power supply terminal of the linear regulator U2 is connected to the wide voltage conversion unit, and the power supply terminal of the linear regulator U2 is grounded through the twelfth capacitor C12. The output terminal of the linear regulator U2 is connected to the data storage circuit 22 and the processing circuit 23, and the output terminal of the linear regulator U2 is grounded through the fourteenth capacitor C14.

[0037] In some embodiments, the linear regulator U2 may be a linear regulator of model ME6118A33.

[0038] Furthermore, such as Figure 3 As shown, the linear regulator unit also includes a thirteenth capacitor C13 connected in parallel with the twelfth capacitor C12 to improve the filtering effect, and a fifteenth capacitor C15 connected in parallel with the fourteenth capacitor C14 to improve the filtering effect.

[0039] In some embodiments, such as Figure 4 As shown, the wireless communication circuit 21 includes a wireless communication chip 211, a SIM card connection unit (not shown), a filtering circuit 212, and an antenna 213. The SIM card communication port group of the wireless communication chip 211 is connected to the SIM card connection unit, which is used to access a SIM card, enabling the wireless communication chip 211 to communicate using 4G or 5G networks. The radio frequency control terminal of the wireless communication chip 211 is connected to the antenna 213 via the filtering circuit 212. The serial communication port group of the wireless communication chip 211 is connected to the processing circuit 23 to output monitoring signals according to the control of the processing circuit 23.

[0040] In some embodiments, the wireless communication chip 211 may be a 4G wireless communication chip of model EC800N.

[0041] like Figure 4 As shown, the filter circuit 212 may include a first filter capacitor, a filter inductor, and a second filter capacitor. The first filter capacitor, the filter inductor, and the second filter capacitor constitute a π-type filter circuit, which can effectively filter out noise in the high-frequency signal output from the wireless communication circuit 21 to the antenna 213, thereby improving the stability of the electromagnetic wave signal generated by the antenna 213.

[0042] Antenna 213 can be an existing 4G RF antenna.

[0043] In some embodiments, such as Figure 5As shown, the SIM card connection unit may include a SIM card interface, a second protection diode U9, four third filter capacitors (including C33, C34, C35, C36, and C37), and four matching resistors (including R17, R18, R19, R20, and R21). Please refer to the documentation for the specific connection structure of the SIM card connection unit. Figure 5 The SIM card interface is used to connect the SIM card, while the second protection diode U9 can be an ESD protection diode. The third filter capacitor plays a filtering role on the corresponding line, and the matching resistor plays a role in matching impedance.

[0044] Since the operating voltages of the wireless communication circuit 21 and the processing circuit 23 are different in some embodiments, for example, the operating voltage of the wireless communication circuit 21 is 4V-5V, while the operating voltage of the processing circuit 23 is 3.3V, in order to avoid damage to the processing circuit 23 due to overvoltage, which would prevent the wireless communication circuit 21 and the processing circuit 23 from being directly connected, the wireless communication circuit 21 may also include a first bus transceiver U5, a second bus transceiver U6, a power control unit, several instruction receiving units, and several instruction output units.

[0045] like Figure 6 As shown, the B power supply terminal of the first bus transceiver U5 and the A power supply terminal of the second bus transceiver U6 are connected to the communication power output terminal of the wireless communication chip 211. The A power supply terminal of the first bus transceiver U5 and the B power supply terminal of the second bus transceiver U6 are connected to the voltage conversion circuit 24. The A terminal of the first bus transceiver U5 is connected to the wireless communication control receiver of the processing circuit 23, and the B terminal of the first bus transceiver U5 is connected to the wireless communication control transmitter of the wireless communication chip 211. The A terminal of the second bus transceiver U6 is connected to the wireless communication control receiver of the wireless communication chip 211, and the B terminal of the second bus transceiver U6 is connected to the wireless communication control transmitter of the processing circuit 23. The first bus transceiver U5 and the second bus transceiver U6 are used to realize the communication level conversion between the wireless communication chip 211 and the processing circuit 23, so that the two can communicate and interact normally.

[0046] The input terminal of the power control unit is connected to the voltage conversion circuit 24, the output terminal of the power control unit is connected to the power supply terminal of the wireless communication chip 211, and the control terminal of the power control unit is connected to the processing circuit 23.

[0047] In some embodiments, such as Figure 7As shown, the power control unit may include a first PMOS transistor Q4, a forty-second capacitor C42, a forty-fourth capacitor C44, a twenty-sixth resistor R26, a fifth NMOS transistor Q5, and a thirty-fifth resistor R35. The source of the first PMOS transistor Q4 is connected to the second terminal of the first inductor L1 in the voltage conversion circuit 24, the first terminal of the forty-second capacitor C42, and the first terminal of the twenty-sixth resistor R26. The second terminal of the forty-second capacitor C42 is grounded. The second terminal of the twenty-sixth resistor R26 is connected to the gate of the first PMOS transistor Q4. The gate of the first PMOS transistor Q4 is connected to the drain of the fifth NMOS transistor Q5. The source of the fifth NMOS transistor Q5 is grounded. The gate of the fifth NMOS transistor Q5 is connected to the processing circuit 23. The gate of the fifth NMOS transistor Q5 is grounded through the thirty-fifth resistor R35. The drain of the first PMOS transistor Q4 is grounded through the forty-fourth capacitor C44. The drain of the first PMOS transistor Q4 is connected to the power supply terminal of the wireless communication chip 211.

[0048] In this embodiment, when the processing circuit 23 outputs a high level to the gate of the fifth NMOS transistor Q5, Q5 turns on, causing the first PMOS transistor Q4 to turn on. This results in a first voltage input to the power supply terminal of the wireless communication chip 211, enabling the wireless communication chip 211 to operate. When the processing circuit 23 outputs a low level to the gate of the fifth NMOS transistor Q5, both Q5 and Q4 turn off, and the wireless communication chip 211 loses power and stops operating.

[0049] Each instruction receiving unit has its first terminal connected to a corresponding instruction receiving terminal of the wireless communication chip 211, its second terminal grounded, and its control terminal connected to a corresponding preset instruction output terminal of the processing circuit 23. The instruction receiving unit is used to perform level conversion on the instruction signals output by the processing circuit 23, ensuring that the converted instruction signals can be correctly recognized by the wireless communication chip 211.

[0050] In some embodiments, such as Figure 8 As shown, each instruction receiving unit may include a first NMOS transistor Q1, a fifteenth resistor R15, and a sixteenth resistor R16. The drain of the first NMOS transistor Q1 is connected to the instruction receiving terminal of the wireless communication chip 211, the source of the first NMOS transistor Q1 is grounded, the gate of the first NMOS transistor Q1 is connected to the preset instruction output terminal of the processing circuit 23 via the fifteenth resistor R15, and the gate of the first NMOS transistor Q1 is also grounded via the sixteenth resistor R16.

[0051] In some embodiments, the number of instruction receiving units can be three. Correspondingly, the instruction receiving end of the wireless communication chip 211 includes a PWRKEY pin, a RESET_N pin, and a MANIN_DTR pin. The processing circuit 23 can then set the levels of the PWRKEY pin, RESET_N pin, and MANIN_DTR pin of the wireless communication chip 211 respectively, thereby inputting relevant instructions to the wireless communication chip 211. The preset instruction output end of the processing circuit 23 can be an I / O port of the processing circuit 23.

[0052] Each instruction output unit has its first terminal connected to a preset instruction receiving terminal of the processing circuit 23, its second terminal grounded, and its control terminal connected to an instruction output terminal of the wireless communication chip 211. The instruction output units are used to perform level conversion on the instruction signals output by the wireless communication chip 211, ensuring that the converted instruction signals can be correctly recognized by the processing circuit 23.

[0053] In some embodiments, such as Figure 9 As shown, each instruction output unit may include a sixth NMOS transistor Q6, a twenty-seventh resistor R27, and a thirty-second resistor R32. The drain of the sixth NMOS transistor Q6 is connected to the preset instruction receiving terminal of the processing circuit 23. The drain of the sixth NMOS transistor Q6 is connected to the voltage conversion circuit 24 via the twenty-seventh resistor R27 to obtain the DC voltage VDD_3V3. The source of the sixth NMOS transistor Q6 is grounded. The gate of the sixth NMOS transistor Q6 is connected to the instruction output terminal of the wireless communication chip 211 via the thirty-second resistor R32.

[0054] In some embodiments, the number of instruction output units can be three. Correspondingly, the instruction output terminal of the wireless communication chip 211 includes a STATUS pin, a MAIN_RI pin, and a NET_STATUS pin. The instruction output terminal can control the on / off state of the sixth NMOS transistor Q6, thereby controlling the preset instruction receiving terminal level of the corresponding processing circuit 23 to achieve the purpose of outputting instructions. The preset instruction receiving terminal of the processing circuit 23 can be an I / O port.

[0055] In some embodiments, such as Figure 1 As shown, the conversion interface 1 may also include a communication switch 15. The common terminal of the communication switch 15 is connected to the input port 11. The first output terminal and the second output terminal of the communication switch 15 are respectively connected to the first communication port 12 and the second communication port 13. The communication switch 15 is used to control the common terminal to connect with the first output terminal or to connect the common terminal with the second output terminal according to the operation.

[0056] In some embodiments, the processing circuit 23 may include a serial communication unit. The processing circuit 23 may include an STM32F030CC microprocessor and related peripheral circuits (including a crystal oscillator circuit, a reset circuit, etc.). The microprocessor is connected to a second communication port 13 via the serial communication unit. The microprocessor is also connected to a wireless communication circuit 21, a data storage circuit 22, and a voltage conversion circuit 24. The serial communication unit may include an SP232A serial communication chip and peripheral electronic components required for the normal operation of the serial communication chip (including multiple capacitors for connecting the charge pump of the serial communication chip, etc.).

[0057] In some embodiments, the data storage circuit 22 includes a flash memory of model W25Q128FVSIG.

[0058] In some embodiments, the communication switch 15 can be an existing double-pole four-throw switch. The two common contacts of the double-pole four-throw switch are connected to the input port 11, the two moving contacts corresponding to the first knife switch of the double-pole four-throw switch are respectively connected to the first communication port 12, and the two moving contacts corresponding to the second knife switch of the double-pole four-throw switch are respectively connected to the second communication port 13.

[0059] This utility model also provides an air radioactive pollution monitoring system, including multiple air radioactive pollution monitors, multiple wireless transmission devices provided in this embodiment corresponding to each air radioactive pollution monitor, and a server communicatively connected to each wireless transmission device. The server is used to uniformly manage the monitoring signals output by each air radioactive pollution monitor.

[0060] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A wireless transmission device for use in an air radioactive pollution monitor, characterized in that, The wireless transmission device includes a conversion interface (1) and a wireless transmission module (2). The conversion interface (1) includes: an input port (11) for connecting to the communication terminal of the air radioactive pollution monitor; a first communication port (12) for connecting the input port (11) to the local display device of the air radioactive pollution monitor; a second communication port (13) for acquiring the monitoring signal output by the air radioactive pollution monitor; and a power supply port (14) for drawing power from the air radioactive pollution monitor. The wireless transmission module (2) includes: a wireless communication circuit (21) for transmitting the monitoring signal; a data storage circuit (22) for storing the monitoring signal that was not transmitted or failed to be transmitted; a processing circuit (23) connected to the second communication port (13), the wireless communication circuit (21) and the data storage circuit (22); and a voltage conversion circuit (24) connected to the power supply port (14), the wireless communication circuit (21), the data storage circuit (22) and the processing circuit (23) for supplying power to each circuit.

2. The wireless transmission device of claim 1, wherein, The voltage conversion circuit (24) includes a wide voltage conversion unit and a linear voltage regulation unit; The wide voltage conversion unit is connected to the power supply port (14) and the wireless communication circuit (21) to draw power from the communication terminal of the air radioactive pollution monitor and output the first voltage; as well as The linear voltage regulator unit is connected to the wide voltage conversion unit, the data storage circuit (22) and the processing circuit (23) to convert the first voltage into a second voltage.

3. The wireless transmission device according to claim 2, characterized in that, The wide voltage conversion unit includes a switch control chip U1, a first diode D1, a first resistor R1, a fifth resistor R5, a sixth capacitor C6, a second diode D2, a first inductor L1, a second capacitor C2, a second resistor R2, and a third resistor R3. The power supply terminal of the switch control chip U1 is connected to the cathode of the first diode D1, and the anode of the first diode D1 is connected to the power supply port (14). The power supply terminal of the switch control chip U1 is connected to the enable terminal of the switch control chip U1 via the first resistor R1. The enable terminal of the switch control chip U1 is grounded via the fifth resistor R5. The power supply terminal of the switch control chip U1 is also grounded via the sixth capacitor C6. The open-drain output terminal of the switch control chip U1 is connected to the cathode of the second diode D2 and the first terminal of the first inductor L1. The anode of the second diode D2 is grounded. The second terminal of the first inductor L1 is connected to the linear voltage regulator unit and the wireless communication circuit (21). One path of the second terminal of the first inductor L1 is grounded via the second capacitor C2, and the other path is grounded via the second resistor R2 and the third resistor R3. The node after the second resistor R2 and the third resistor R3 are connected is connected to the feedback terminal of the switch control chip U1.

4. The wireless transmission device of claim 2, wherein, The linear voltage regulator unit includes a linear voltage regulator U2, a twelfth capacitor C12, and a fourteenth capacitor C14; the power supply terminal of the linear voltage regulator U2 is connected to the wide voltage conversion unit, the power supply terminal of the linear voltage regulator U2 is grounded through the twelfth capacitor C12, the output terminal of the linear voltage regulator U2 is connected to the data storage circuit (22) and the processing circuit (23), and the output terminal of the linear voltage regulator U2 is grounded through the fourteenth capacitor C14.

5. The wireless transmission device of claim 1, wherein, The wireless communication circuit (21) includes a wireless communication chip (211), a SIM card connection unit, a filtering circuit (212), and an antenna (213). The SIM card communication port group of the wireless communication chip (211) is connected to the SIM card connection unit, the SIM card connection unit is used to access the SIM card, the radio frequency control terminal of the wireless communication chip (211) is connected to the antenna (213) through the filter circuit (212), and the serial port communication port group of the wireless communication chip (211) is connected to the processing circuit (23).

6. The wireless transmission device of claim 5, wherein, The wireless communication circuit (21) also includes a first bus transceiver U5, a second bus transceiver U6, a power control unit, several instruction receiving units and several instruction output units. The B power supply terminal of the first bus transceiver U5 and the A power supply terminal of the second bus transceiver U6 are connected to the communication power output terminal of the wireless communication chip (211). The A power supply terminal of the first bus transceiver U5 and the B power supply terminal of the second bus transceiver U6 are connected to the voltage conversion circuit (24). The A terminal of the first bus transceiver U5 is connected to the wireless communication control receiving terminal of the processing circuit (23). The B terminal of the first bus transceiver U5 is connected to the wireless communication control transmitting terminal of the wireless communication chip (211). The A terminal of the second bus transceiver U6 is connected to the wireless communication control receiving terminal of the wireless communication chip (211). The B terminal of the second bus transceiver U6 is connected to the wireless communication control transmitting terminal of the processing circuit (23). The input terminal of the power control unit is connected to the voltage conversion circuit (24), the output terminal of the power control unit is connected to the power supply terminal of the wireless communication chip (211), and the control terminal of the power control unit is connected to the processing circuit (23). The first end of each instruction receiving unit is connected to the instruction receiving end of the wireless communication chip (211) in a one-to-one correspondence. The second end of each instruction receiving unit is grounded. The control end of each instruction receiving unit is connected to the preset instruction output end of the processing circuit (23) in a one-to-one correspondence. The first end of each instruction output unit is connected to the preset instruction receiving end of the processing circuit (23) in a one-to-one correspondence. The second end of each instruction output unit is grounded. The control end of each instruction output unit is connected to the instruction output end of the wireless communication chip (211) in a one-to-one correspondence.

7. The wireless transmission device of claim 6, wherein, Each instruction receiving unit includes a first NMOS transistor Q1 and a sixteenth resistor R16. The drain of the first NMOS transistor Q1 is connected to the instruction receiving terminal of the wireless communication chip (211). The source of the first NMOS transistor Q1 is grounded. The gate of the first NMOS transistor Q1 is connected to the preset instruction output terminal of the processing circuit (23). The gate of the first NMOS transistor Q1 is also grounded through the sixteenth resistor R16. Each instruction output unit includes a sixth NMOS transistor Q6, a twenty-seventh resistor R27, and a thirty-second resistor R32. The drain of the sixth NMOS transistor Q6 is connected to the preset instruction receiving terminal of the processing circuit (23). The drain of the sixth NMOS transistor Q6 is connected to the voltage conversion circuit (24) via the twenty-seventh resistor R27. The source of the sixth NMOS transistor Q6 is grounded. The gate of the sixth NMOS transistor Q6 is connected to the instruction output terminal of the wireless communication chip (211) via the thirty-second resistor R32.

8. The wireless transmission apparatus of claim 6, wherein, The power control unit includes a first PMOS transistor Q4, a forty-second capacitor C42, a forty-fourth capacitor C44, a twenty-sixth resistor R26, a fifth NMOS transistor Q5, and a thirty-fifth resistor R35; The source of the first PMOS transistor Q4 is connected to the voltage conversion circuit (24), the first terminal of the forty-second capacitor C42 and the first terminal of the twenty-sixth resistor R26. The second terminal of the forty-second capacitor C42 is grounded. The second terminal of the twenty-sixth resistor R26 is connected to the gate of the first PMOS transistor Q4. The gate of the first PMOS transistor Q4 is connected to the drain of the fifth NMOS transistor Q5. The source of the fifth NMOS transistor Q5 is grounded. The gate of the fifth NMOS transistor Q5 is connected to the processing circuit (23). The gate of the fifth NMOS transistor Q5 is grounded through the thirty-fifth resistor R35. The drain of the first PMOS transistor Q4 is grounded through the forty-fourth capacitor C44. The drain of the first PMOS transistor Q4 is connected to the power supply terminal of the wireless communication chip (211).

9. The wireless transmission device according to any one of claims 1 to 8, characterized in that, The conversion interface (1) further includes a communication switch (15). The common terminal of the communication switch (15) is connected to the input port (11). The first output terminal and the second output terminal of the communication switch (15) are respectively connected to the first communication port (12) and the second communication port (13). The communication switch (15) is used to control the common terminal to connect with the first output terminal or control the common terminal to connect with the second output terminal according to the operation.

10. An airborne radioactivity monitoring system, characterised in that, include: Multiple air radioactive pollution monitoring instruments; A plurality of wireless transmission devices as described in any one of claims 1 to 9, corresponding one-to-one with each of the aforementioned air radioactive pollution monitors; as well as A server that is communicatively connected to each of the aforementioned wireless transmission devices.

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