1E-grade hygrograph for high-temperature gas cooled reactor and calibration method

Abstract

The invention discloses a 1E-grade hygrograph for a high-temperature gas cooled reactor and a calibration method. The calibration method comprises the steps that one end of a humidity sensor is connected with a glass sealing through joint, and the other end of the humidity sensor is in contact with helium; the transmitting circuit is connected with one end, far away from the humidity sensor, of the glass sealing penetrating joint, and the transmitting circuit is connected with the humidity sensor through a conductor in the glass sealing penetrating joint; one end of the top plate circuit is welded with the transmitting circuit, and the other end of the top plate circuit is welded with the signal connector; the first O-shaped sealing ring is mounted in a sealing groove of the glass sealing penetrating joint; the metal protective cover is installed at one end of the glass sealing penetrating connector. The metal shell is installed at the other end of the glass sealing penetrating connector. The screw rod is fixed on the glass sealing through joint, and the screw rod is matched with the screw to connect and fix the metal shell and the glass sealing through joint. The invention belongs to the field of hygrometers. The hygrometer provided by the invention is compact in overall structure, safe and reliable.

Description

Technical Field

[0001] The present invention relates to the field of hygrometers, and in particular to a 1E-level hygrometer for a high-temperature gas-cooled reactor and a calibration method. Background Art

[0002] Helium is the primary heat transfer medium in high-temperature gas-cooled reactors (HTGRs). The humidity of the primary helium serves as an alarm and protection trigger for steam generator pipe rupture accidents, making it a critical parameter for ensuring reactor safety. A Class 1E hygrometer measures the humidity of the primary helium at the main helium blower outlet and outputs a (4-20) mA signal to the protection system.

[0003] Class 1E hygrometers operate in harsh environments, with operating temperatures up to 60°C, operating pressures up to 7 MPa, and a humidity range of -50°C dp to 60°C dp. Currently, Class 1E hygrometers used in high-temperature gas-cooled reactors are analog hygrometers. These instruments are complex, expensive, have poor reliability, and a short lifespan, making them difficult to meet the long-term operation requirements of high-temperature gas-cooled reactors. Therefore, developing a simple, stable, and reliable Class 1E hygrometer for high-temperature gas-cooled reactors is an urgent challenge. Summary of the Invention

[0004] The present invention solves the technical problems of the complex structure and poor stability of existing 1E-level hygrometers in the prior art by providing a 1E-level hygrometer for a high-temperature gas-cooled reactor and a calibration method, thereby achieving the technical effect of providing a 1E-level hygrometer for a high-temperature gas-cooled reactor with a simple structure, stability and reliability.

[0005] In a first aspect, the present invention provides a 1E-class hygrometer for a high-temperature gas-cooled reactor, comprising: a metal protective cover, a glass-sealed through-connector, a screw, a metal housing, a sealing gasket, a humidity sensor, a transmitter circuit, a top plate circuit, a first sealing O-ring, a second sealing O-ring, a signal connector, and a screw; One end of the humidity sensor is connected to the glass sealed through-connector, and the other end is in contact with the helium gas; The transmitting circuit is connected to an end of the glass-sealed through-connector away from the humidity sensor, and the transmitting circuit is connected to the humidity sensor through a conductor in the glass-sealed through-connector; One end of the top plate circuit is welded to the transmitter circuit, and the other end of the top plate circuit is welded to the signal connector, wherein the signal connector is covered with a sealing gasket; The first sealing O-ring is installed in the sealing groove of the glass sealing through-joint to seal the helium; A metal protective cover is installed at one end of the glass sealed through-connector for nesting the humidity sensor inside; The metal housing is mounted on the other end of the glass-sealed through-connector and is used to embed the transmitter circuit therein, wherein a second sealing O-ring is mounted at the connection between the metal housing and the glass-sealed through-connector; The screw rod is fixed on the glass sealing through-joint, and the screw rod cooperates with the screw to connect and fix the metal shell and the glass sealing through-joint.

[0006] Further, including: Based on the I2C interface of the transmitter circuit, the transmitter circuit is connected to the humidity sensor for communication. The transmitter circuit is used to control the working mode of the humidity sensor and collect humidity data from the humidity sensor. Based on the DC power output interface of the transmitter circuit, the transmitter circuit supplies power to the humidity sensor; The transmission circuit includes a main controller, which is used to process humidity data and output the processed humidity data.

[0007] Furthermore, it also includes: The transmitter circuit contains a hardware watchdog circuit, which is used to monitor the operating status of the main controller, humidity sensor or software, and control the humidity meter to output a 20.5mA alarm signal; Based on the RS485 interface of the transmitter circuit, the transmitter circuit is connected to the host computer for communication, and the host computer is used to debug and calibrate the humidity meter.

[0008] Further, including: The top plate circuit is used to lead out the current signal and RS485 signal of the transmitter circuit.

[0009] Further, including: The number of conductors in the glass sealed through-joint is four.

[0010] In a second aspect, the present invention provides a calibration method, comprising: After the hygrometer is assembled, the calibration data to be input for the hygrometer at different dew point values ​​is determined based on the standard dew point meter, wherein the calibration data includes the dew point value and the calibration value corresponding to the dew point value; Get the stored calibration data in the humidity meter; After the calibration data to be input is input into the hygrometer, the stored calibration data is calibrated according to the calibration data to be input.

[0011] One or more technical solutions provided in the present invention have at least the following technical effects or advantages: The 1E-level hygrometer for high-temperature gas-cooled reactors provided by the present invention has high reliability, high protection level and excellent environmental adaptability, and is suitable for complex and harsh working conditions such as high temperature, high humidity, and radiation in nuclear power plants. The present invention ensures signal transmission stability and airtightness by adopting a glass-sealed through-joint 2 and a four-core conductor connection structure; the hardware watchdog circuit improves the system's self-test and fault alarm capabilities, and outputs a 20.5mA abnormal signal to achieve timely warning; the IP65 protection level design is effectively dustproof and waterproof, ensuring the safe operation of the internal circuit; it also supports I2C communication and RS485 interfaces, which facilitate remote monitoring, debugging and calibration, and enhances the intelligence level and maintainability of the equipment. The overall structure is compact, safe and reliable, meeting the high standards of accuracy, stability and safety required of nuclear-grade instruments.

[0012] The present invention uses an integrated humidity sensor 6 to measure temperature and humidity. The sensor is calibrated at the factory, ensuring good consistency and reducing the calibration workload during hygrometer manufacturing. The transmitter circuit 7 has a hardware watchdog that can alarm for hardware circuit damage and software errors. The use of a fully digital circuit reduces circuit complexity compared to traditional analog circuits, reduces the impact of drift and component precision drift, and improves measurement accuracy and reliability. It has an external communication interface, allowing for on-site debugging and calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 A schematic structural diagram of a 1E-class hygrometer for a high-temperature gas-cooled reactor provided by the present invention; Figure 2 A schematic flow chart of a calibration method provided by the present invention; Figure 3 This is a schematic diagram of the circuit principle of the transmission circuit provided by the present invention.

[0015] Reference numerals 1-Metal protective cover, 2-Glass sealed through-connector, 3-Screw, 4-Metal housing, 5-Sealing gasket, 6-Humidity sensor, 7-Transmitter circuit, 8-Top plate circuit, 101-First sealing O-ring, 102-Second sealing O-ring 2, 103-Signal connector, 201-Screw. DETAILED DESCRIPTION

[0016] The embodiment of the present invention solves the technical problems of the existing 1E-level hygrometers in the prior art, such as complex structure and poor stability, by providing a 1E-level hygrometer for a high-temperature gas-cooled reactor.

[0017] The technical solution of the present invention is to solve the above technical problems, and the overall idea is as follows: A 1E-class hygrometer for a high-temperature gas-cooled reactor comprises: a metal protective cover, a glass-sealed through-joint, a screw, a metal housing, a sealing gasket, a humidity sensor, a transmitter circuit, a top plate circuit, a first sealing O-ring, a second sealing O-ring, a signal connector, and a screw; one end of the humidity sensor is connected to the glass-sealed through-joint, and the other end is in contact with helium; the transmitter circuit is connected to an end of the glass-sealed through-joint remote from the humidity sensor, and the transmitter circuit and the humidity sensor are connected via a conductor in the glass-sealed through-joint; one end of the top plate circuit is welded to the transmitter circuit, and the other end of the top plate circuit is welded to the signal connector, wherein the signal connector is covered with a sealing gasket; the first sealing O-ring is installed in a sealing groove of the glass-sealed through-joint for sealing helium; the metal protective cover is installed at one end of the glass-sealed through-joint for nesting the humidity sensor therein; the metal housing is installed at the other end of the glass-sealed through-joint for nesting the transmitter circuit therein, wherein a second sealing O-ring is installed at the connection between the metal housing and the glass-sealed through-joint; the screw is fixed to the glass-sealed through-joint, and the screw cooperates with the screw to connect and fix the metal housing to the glass-sealed through-joint.

[0018] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0019] First, the term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. Furthermore, the character " / " in this document generally indicates an "or" relationship between the associated objects.

[0020] The present invention provides Figure 1 A 1E-class hygrometer for a high-temperature gas-cooled reactor includes: a metal protective cover 1, a glass-sealed through-connector 2, a screw 3, a metal housing 4, a sealing gasket 5, a humidity sensor 6, a transmitter circuit 7, a top plate circuit 8, a first sealing O-ring 101, a second sealing O-ring, a signal connector 103, and a screw 201.

[0021] One end of the humidity sensor 6 is connected to the glass sealed through-connector 2 , and the other end of the humidity sensor 6 is in contact with the helium gas, namely, the contact end, which is used to measure the humidity of the helium gas.

[0022] The transmitting circuit 7 is connected to the end of the glass-sealed through-joint 2 away from the humidity sensor 6. The transmitting circuit 7 and the humidity sensor 6 are connected through the conductors in the glass-sealed through-joint 2. Specifically, the number of conductors in the glass-sealed through-joint 2 is 4.

[0023] The use of four conductors can realize multi-channel transmission such as power supply and signal input and output, ensuring the accuracy and real-time performance of data collected by the humidity sensor 6. It is also easy to integrate and debug, and is suitable for harsh working environments such as high temperature, high humidity or corrosion.

[0024] in: The transmitting circuit 7 has an I2C interface. Based on the I2C interface of the transmitting circuit 7, the transmitting circuit 7 is connected to the humidity sensor 6 for communication. The transmitting circuit 7 is used to control the working mode of the humidity sensor 6 and collect and read humidity data from the humidity sensor 6.

[0025] The transmission circuit 7 has a low-voltage DC power output interface. Based on the DC power output interface of the transmission circuit 7 , the transmission circuit 7 supplies power to the humidity sensor 6 .

[0026] The transmission circuit 7 includes a main controller, which is used to process humidity data and output the processed humidity data.

[0027] The main controller is the core component in an electronic device or system that is responsible for processing and managing various tasks. In the present invention, the main controller is responsible for processing the data obtained from the humidity sensor 6 and outputting the processed humidity data. The main controller can be a microcontroller (MCU), a digital signal processor (DSP), or other types of processors.

[0028] Also includes: The transmitting circuit 7 contains a hardware watchdog circuit, which is used to monitor the operating status of the main controller, the humidity sensor 6 or the software, and control the humidity meter to output a 20.5mA alarm signal.

[0029] Hardware watchdog circuits are a mechanism used to improve system stability and reliability, and are particularly common in embedded systems.

[0030] The hardware watchdog circuit operates based on a timer that resets periodically at set intervals. When the software is operating normally, it periodically sends a signal to the watchdog circuit (i.e., "feeds the watchdog") to prevent the watchdog timer from timing out. If, for some reason (such as a program crash or deadlock), the software fails to "feed the watchdog" on time, the watchdog timer will time out and the hygrometer will output a 20.5mA alarm signal.

[0031] If the main controller or humidity sensor 6 fails or the software runs wild, it will cause the watchdog timer to overflow, causing the humidity meter to output a 20.5mA alarm signal.

[0032] The transmitter circuit 7 is provided with an RS485 interface. Based on the RS485 interface of the transmitter circuit 7, the transmitter circuit 7 is connected to a host computer for communication. The host computer is used to debug and calibrate the humidity meter.

[0033] One end of the top plate circuit 8 (the function of the top plate circuit 8 is electrical connection. A Hirschmann connector is welded on the top plate to lead the electrical signal to the outside world through the connector) is welded to the transmitter circuit 7, and the other end of the top plate circuit is welded to the signal connector 103, which is used to lead out the (4~20)mA signal and RS485 signal of the transmitter circuit 7. The signal connector 103 is covered with a sealing gasket 5, which is used to prevent dust and water vapor from entering the casing to achieve the IP65 protection level.

[0034] The first sealing O-ring 101 is installed in the sealing groove of the glass sealing through-joint 2 for sealing helium.

[0035] The metal protective cover 1 is installed at one end of the glass sealed through-joint 2 and is used to nest the humidity sensor 6 therein to prevent the humidity sensor 6 from being damaged by collisions during transportation, storage, installation and use.

[0036] The metal housing 4 is installed at the other end of the glass-sealed through-joint 2 and is used to nest the transmitter circuit 7 therein. A second sealing O-ring is installed at the connection between the metal housing 4 and the glass-sealed through-joint 2. The second sealing O-ring is used to prevent dust and water vapor from entering the housing to achieve an IP65 protection level.

[0037] The screw rod 3 is fixed on the glass-sealed through-joint 2 , and the screw rod 3 cooperates with the screw 201 to connect and fix the metal housing 4 to the glass-sealed through-joint 2 .

[0038] In this embodiment of the present invention, humidity sensor 6 can be the Texas Instruments HDC3020-Q1 sensor. The HDC3020-Q1 sensor measures humidity using capacitance, offering extremely fast response speed and high stability. Humidity sensor 6 is soldered onto a small PCB to facilitate sensor signal extraction. The PCB provides four interfaces: the positive and negative terminals for sensor power supply, and the I2C SDA and SCL signal interfaces.

[0039] Glass-sealed through-connector 2 has four conductors that electrically connect the positive and negative sensor power supply terminals, the I2C SDA and SCL signal terminals, and the transmitter circuit 7. The glass seal of the glass-sealed connector has a pressure resistance of 8.1 MPa. A groove is defined at the bottom of the connector, containing an O-ring that seals the helium gas after the hygrometer is installed.

[0040] The main controller can be an STMicroelectronics STM32L151 microcontroller. The 4-20 mA output can be achieved using a current loop control chip, the XTR117. The main controller's DAC outputs a voltage, which is converted through a resistor into a 0.04-0.2 mA current. This current is amplified by the XTR117 and converted into a 4-20 mA signal output.

[0041] The hardware watchdog on transmitter circuit 7 consists of a D-type flip-flop, a timer, and an inverter. The output of the D-type flip-flop is connected to the switching pin of an analog switch. The normally closed contact of the analog switch is connected to the humidity signal output terminal of the main controller, and the normally open contact is connected to the alarm signal output terminal. The output of the analog switch is connected to the current loop control chip. A signal can be used to control the analog switch to select either the humidity signal or the alarm signal output to the current loop control chip.

[0042] When the hygrometer is operating normally, the main controller will periodically output a pulse to the timer, the output of the D trigger is low, and the normally closed contact signal of the analog switch is controlled to output, thereby outputting the normal humidity signal measured by the hygrometer. When the hygrometer fails, the output of the D trigger is high, and the normally open contact signal of the analog switch is controlled to output an alarm signal.

[0043] After the main controller is powered on, it will output a high-level signal, which will be converted into a low-level signal through the inverter. The low-level signal is connected to the clear bit of the D-type flip-flop to clear the D-type flip-flop so that the D-type flip-flop always outputs a low-level signal after power-on.

[0044] If the main controller or humidity sensor 6 circuit is damaged or the software runs wild, the main controller will not output pulses to the timer. After the timer overflows, it will output a reset signal of a low-level pulse. The reset signal is connected to the clock signal interface of the D-type flip-flop. At the rising edge of the reset signal, the D-type flip-flop outputs a high-level signal prefabricated at the input end, controls the normally open contact signal output of the analog switch, and continuously outputs the alarm signal until power is restored.

[0045] The level conversion chip converts the signal output by the STM32 serial port into the RS485 level format so that it can communicate with the host computer.

[0046] Figure 3 This is a schematic diagram of the transmission circuit 7 provided by the present invention.

[0047] The 1E-level hygrometer for high-temperature gas-cooled reactors provided by the present invention has high reliability, high protection level and excellent environmental adaptability, and is suitable for complex and harsh working conditions such as high temperature, high humidity, and radiation in nuclear power plants. The present invention ensures signal transmission stability and airtightness by adopting a glass-sealed through-joint 2 and a four-core conductor connection structure; the hardware watchdog circuit improves the system's self-test and fault alarm capabilities, and outputs a 20.5mA abnormal signal to achieve timely warning; the IP65 protection level design is effectively dustproof and waterproof, ensuring the safe operation of the internal circuit; it also supports I2C communication and RS485 interfaces, which facilitate remote monitoring, debugging and calibration, and enhances the intelligence level and maintainability of the equipment. The overall structure is compact, safe and reliable, meeting the high standards of accuracy, stability and safety required of nuclear-grade instruments.

[0048] The present invention uses an integrated humidity sensor 6 to measure temperature and humidity. The sensor is calibrated at the factory, ensuring good consistency and reducing the calibration workload during hygrometer manufacturing. The transmitter circuit 7 has a hardware watchdog that can alarm for hardware circuit damage and software errors. The use of a fully digital circuit reduces circuit complexity compared to traditional analog circuits, reduces the impact of drift and component precision drift, and improves measurement accuracy and reliability. It has an external communication interface, allowing for on-site debugging and calibration.

[0049] Based on the same inventive concept, the present invention provides Figure 2 A calibration method is shown, based on, comprising steps S21-S23: Step S21 : After the hygrometer is assembled, based on a standard dew point meter, determining the calibration data to be input for the hygrometer at different dew point values, wherein the calibration data includes the dew point value and the calibration value corresponding to the dew point value.

[0050] The calibration of the hygrometer can be implemented through software. After the hygrometer is manufactured, its accuracy is poor, and the hygrometer needs to be debugged at the factory to improve its accuracy.

[0051] In addition, the humidity meter will also produce accuracy drift after long-term use, resulting in a decrease in accuracy, and it needs to be calibrated.

[0052] The accuracy of the hygrometer can be tested and compared with a standard dew point meter to obtain the calibration data to be input at different dew point values.

[0053] The calibration data to be input is a two-dimensional array. The first column is the dew point value output by the hygrometer, and the second column is the calibration value corresponding to the dew point value.

[0054] Step S22: obtaining the stored calibration data in the hygrometer.

[0055] The stored calibration data may be calibration data already stored in the FLASH memory of the hygrometer; the stored calibration data is also a two-dimensional array, the first column being the dew point value output by the hygrometer, and the second column being the calibration value corresponding to the dew point value.

[0056] Step S23: After the calibration data to be input is input into the hygrometer, the stored calibration data is calibrated according to the calibration data to be input.

[0057] Specifically include: If there is no calibration data to be input on the left side of the stored calibration data, calibrating the stored calibration data according to the calibration data to be input on the right side of the stored calibration data; If there is no calibration data to be input on the right side of the stored calibration data, calibrating the stored calibration data according to the calibration data to be input on the left side of the stored calibration data; If there is calibration data to be input on both sides of the stored calibration data, the stored calibration data is updated according to the calibration data to be input on both sides of the stored calibration data. For example: The calibration data to be input is [[10, 5], [20, 9]], where 10 and 20 are dew point values, and 5 and 9 are corresponding calibration values.

[0058] Assume that the calibration data originally stored in FLASH is [-10, 1], [15, 5], [30, 2]].

[0059] For the stored calibration data [-10, 1], there is no dew point value adjacent to it on the left, and the dew point value adjacent to it on the right is 10 in [10, 5]. Therefore, the updated calibration value of [10, 5] is: [10, 5+1]=[10, 6].

[0060] For [15, 5], the left side is [10, 5] and the right side is [20, 9]. The updated calibration value of [15, 5] is [15, 5+(9+5) / 2]=[15, 12].

[0061] For the stored calibration data [30, 2], there is no calibration data to be input on the right side, and the left side is [20, 9]. Then the updated calibration value of [30, 2] is: [30, 2+9]=[30, 11].

[0062] In addition, it also includes: The calibrated humidity sensor 6 and the hygrometer are placed in a humidity calibration box, and first humidity data of the humidity sensor 6 and second humidity data of the hygrometer are obtained; determining a humidity repetition rate and a humidity difference rate according to the first humidity data and the second humidity data; Determine whether the humidity meter needs calibration based on the humidity repetition rate and humidity difference rate; If it exists, the humidity meter will be calibrated according to the calibration data to be entered.

[0063] A humidity calibration chamber is an enclosed device designed to provide a stable, controlled humidity environment. It is primarily used for testing, calibrating, and comparing humidity sensors or humidity measuring instruments (such as hygrometers). The chamber precisely regulates and maintains the humidity level within the chamber, ensuring measurements are performed under standard conditions, thereby improving the accuracy and consistency of humidity measurement equipment.

[0064] Determining whether the hygrometer needs to be calibrated based on the humidity repetition rate and the humidity difference rate includes: determining a humidity deviation of the hygrometer based on the humidity repetition rate and the humidity difference rate; if the humidity deviation is greater than a preset deviation threshold, the hygrometer needs to be calibrated.

[0065] If the humidity deviation is less than or equal to the preset deviation threshold, it means that the humidity meter is highly accurate and no correction is required.

[0066] The humidity deviation of the hygrometer is determined based on the humidity repetition rate and humidity difference rate, including:

[0067]

[0068]

[0069] in, is the humidity deviation of the hygrometer, is the number of samples of the second humidity data, is the humidity repetition rate, is the humidity difference rate, and All are preset weights. is the number of repeated samples in the first humidity data and the second humidity data, For the The first humidity data, For the Second humidity data.

[0070] The humidity repeatability of the present invention reflects the measurement consistency of the hygrometer under the same environmental conditions, while the humidity difference rate reflects the degree of deviation from the known accurate value. The combination of the two can comprehensively evaluate the stability and accuracy of the hygrometer. The humidity deviation provided by the present invention can be pre-calibrated before implementation, avoiding the waste of resources caused by direct calibration.

[0071] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0072] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A 1E-level hygrometer for high-temperature gas-cooled reactor, characterized in that: include: Metal protective cover, glass sealed through-connector, screw, metal housing, sealing gasket, humidity sensor, transmitter circuit, top plate circuit, first sealing O-ring, second sealing O-ring, signal connector and screws; One end of the humidity sensor is connected to the glass sealed through-connector, and the other end is in contact with helium; The transmission circuit is connected to an end of the glass-sealed through-connector away from the humidity sensor, and the transmission circuit is connected to the humidity sensor via a conductor in the glass-sealed through-connector; One end of the top plate circuit is welded to the transmitter circuit, and the other end of the top plate circuit is welded to the signal connector, wherein the signal connector is covered with a sealing gasket; The first sealing O-ring is installed in the sealing groove of the glass sealing through-joint to seal the helium; The metal protective cover is installed at one end of the glass sealed through-connector and is used to nest the humidity sensor therein; The metal shell is installed at the other end of the glass-sealed through-connector and is used to embed the transmitter circuit therein, wherein a second sealing O-ring is installed at the connection between the metal shell and the glass-sealed through-connector; The screw is fixed on the glass sealing through-joint, and the screw cooperates with the screw to connect and fix the metal shell and the glass sealing through-joint.

2. A 1E-level hygrometer for a high-temperature gas-cooled reactor according to claim 1, characterized in that: include: Based on the I2C interface of the transmission circuit, the transmission circuit is connected to the humidity sensor for communication, and the transmission circuit is used to control the working mode of the humidity sensor and collect humidity data from the humidity sensor; A DC power output interface based on a transmitter circuit, wherein the transmitter circuit supplies power to the humidity sensor; The transmission circuit includes a main controller, which is used to process humidity data and output the processed humidity data.

3. A 1E-level hygrometer for a high-temperature gas-cooled reactor according to claim 2, characterized in that: Also includes: The transmitting circuit contains a hardware watchdog circuit, which is used to monitor the operating status of the main controller, humidity sensor or software, and control the humidity meter to output a 20.5mA alarm signal; Based on the RS485 interface of the transmitter circuit, the transmitter circuit is communicatively connected with a host computer, and the host computer is used to debug and calibrate the hygrometer.

4. A 1E-level hygrometer for a high-temperature gas-cooled reactor according to claim 1, characterized in that: include: The top plate circuit is used to lead out the current signal and RS485 signal of the transmission circuit.

5. The 1E-level hygrometer for a high-temperature gas-cooled reactor according to claim 1, characterized in that: include: The number of conductors in the glass sealed through-joint is four.

6. A calibration method, characterized in that: A 1E-level hygrometer for a high-temperature gas-cooled reactor according to any one of claims 1 to 5, comprising: After the hygrometer is assembled, the calibration data to be input for the hygrometer at different dew point values ​​is determined based on a standard dew point meter, wherein the calibration data includes the dew point value and the calibration value corresponding to the dew point value; Get the stored calibration data in the humidity meter; After the calibration data to be input is input into the hygrometer, the stored calibration data is calibrated according to the calibration data to be input.

7. A calibration method according to claim 6, characterized in that: Calibrate the stored calibration data according to the calibration data to be input, including: If there is no calibration data to be input on the left side of the stored calibration data, calibrating the stored calibration data according to the calibration data to be input on the right side of the stored calibration data; If there is no calibration data to be input on the right side of the stored calibration data, calibrating the stored calibration data according to the calibration data to be input on the left side of the stored calibration data; If there is calibration data to be input on both sides of the stored calibration data, the stored calibration data is updated according to the calibration data to be input on both sides of the stored calibration data.

8. A calibration method according to claim 6, characterized in that: include: Placing a calibrated humidity sensor and a hygrometer in a humidity calibration box, and obtaining first humidity data from the humidity sensor and second humidity data from the hygrometer; determining a humidity repetition rate and a humidity difference rate according to the first humidity data and the second humidity data; Determine whether the humidity meter needs calibration based on the humidity repetition rate and humidity difference rate; If it exists, the humidity meter will be calibrated according to the calibration data to be entered.

9. A calibration method according to claim 8, characterized in that: Based on the humidity repetition rate and humidity difference rate, determine whether the humidity meter needs calibration, including: Determining the humidity deviation of the hygrometer according to the humidity repetition rate and the humidity difference rate; If the humidity deviation is greater than a preset deviation threshold, the humidity meter needs to be calibrated.

10. A calibration method according to claim 9, characterized in that: Determining the humidity deviation of the hygrometer according to the humidity repetition rate and the humidity difference rate includes: in, is the humidity deviation of the hygrometer, is the number of samples of the second humidity data, is the humidity repetition rate, is the humidity difference rate, and All are preset weights. is the number of repeated samples in the first humidity data and the second humidity data, For the The first humidity data, For the Second humidity data.

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