CN221550953U - Regional automatic weather station checking and overhauling instrument - Google Patents

Abstract

An inspection and maintenance instrument for an automatic regional weather station relates to the technical field of detection of regional weather stations, and solves the problems that the existing inspection and maintenance instrument for the weather station cannot judge the accuracy of acquired data, has no functions of line on-off detection, emergency power supply and the like, and cannot meet practical application. The device comprises a singlechip, a temperature sensor, a humidity sensor, a wind direction sensor, a wind speed sensor, a rainfall sensor and a voltage detection circuit which are electrically connected with the singlechip; the air pressure sensor, the buzzer and the power supply module are electrically connected with the singlechip. The overhaul instrument disclosed by the utility model has the advantages that the overhaul functions of other sensors are simultaneously considered, and the overhaul instrument is convenient to carry; meanwhile, the rainfall calibration function can be realized, and the designed emergency power interface can be powered by using an automatic weather station storage battery under the condition of no electricity.

Description

Regional automatic weather station checking and overhauling instrument

Technical Field

The utility model relates to the technical field of regional weather station detection, in particular to a regional automatic weather station checking and overhauling instrument.

Background

At present, a plurality of patent technologies exist in the checking and overhauling technology of the regional automatic weather station, and the existing patents closest to the present application are as follows: the application number is: 201721713288.2. patent name: an instrument with the function of detecting, maintaining and maintaining an automatic weather station. The technology of the patent has the following technical defects:

(1) The current regional automatic weather station mainly comprises six elements: wind direction, wind speed, temperature, humidity, rainfall, barometric pressure, whereas in this solution there is no detection of barometric pressure.

(2) The detection of the equipment is to judge whether the sensor circuit is good or not by reading the numerical value of the sensor, and if the meteorological data deviate from the real meteorological data, the judgment cannot be carried out at all. That is, the set of equipment cannot accurately judge the distorted weather station sensor.

(3) The device can only detect whether the rainfall sensor is good or not, and the rainfall sensor can not be calibrated according to the standard. That is, the tipping bucket type rainfall sensor of the automatic weather station in the current area cannot judge whether the accuracy meets the requirement.

(4) The equipment cannot realize the on-off detection alarm function of the common line.

(5) The device has no emergency power supply function.

Therefore, the utility model provides an area automatic weather station checking and overhauling instrument for solving the technical problems.

Disclosure of utility model

The utility model provides an area automatic weather station checking and overhauling instrument, which aims to solve the problems that the existing weather station checking and overhauling instrument cannot judge the accuracy of acquired data, and cannot meet the actual application due to the fact that the existing weather station checking and overhauling instrument does not have the functions of line on-off detection, emergency power supply and the like.

The overhauling instrument comprises a singlechip, a temperature sensor, a humidity sensor, a wind direction sensor, a wind speed sensor, a rainfall sensor and a voltage detection circuit which are electrically connected with the singlechip; the air pressure sensor and the buzzer are electrically connected with the singlechip;

Two temperature sensor interfaces, two humidity sensor interfaces and two air pressure sensor interfaces are arranged on the overhauling instrument shell; the system is respectively used for being connected with a temperature sensor, a humidity sensor, an air pressure sensor and a standard temperature sensor, a standard humidity sensor and a standard air pressure sensor of an automatic weather station, and the measured sensor and the numerical value of each standard sensor are displayed through a liquid crystal screen of the shell.

Further, a rainfall sensor interface is arranged on the overhauling instrument shell and is connected with a rainfall sensor wiring terminal in the automatic weather station collecting box; or a detection line is adopted, one end of the detection line is connected with the rainfall sensor interface in a plug-in mode, and the other end of the detection line is connected with a wiring terminal of the rainfall sensor in a crocodile clip mode.

Further, the voltage detection circuit comprises a resistor R1 and a resistor R2;

The detected voltage end is connected with one end of a resistor R1, and the other end of the resistor R1 is connected with one end of a resistor R2 and the voltage end after voltage division; the other end of the resistor R2 is grounded;

The voltage detection circuit modulates the detected voltage to be less than or equal to 3.3V through the voltage division circuit, and measures the detected voltage through an ADC chip in the singlechip to obtain the detected voltage value.

Further, by connecting the detection probes TEST1 and TEST2 at two ends of the line, the test_stm32 is connected with a detection I/O port of the singlechip, when the detected line is a path, the test_stm32 is at a high level, if the line is an open circuit, the test_stm32 is at a low level, and the buzzer does not sound; the on-off condition of the circuit is judged by detecting the high and low levels through the singlechip.

Further, the temperature sensor adopts a constant current source circuit, and the circuit comprises a four-wire PT100 platinum resistor temperature measuring circuit and an operational amplifier circuit; the current obtains a voltage value in linear relation with temperature through a four-wire PT100 platinum resistor temperature measuring circuit, the operational amplifier circuit amplifies the voltage value, reads the voltage value after ADC conversion in the singlechip, obtains the resistance value of the four-wire PT100 platinum resistor according to the obtained voltage value and the obtained current value, and finally obtains the temperature value.

Further, the measurement range of the humidity sensor is 0-100% RH, the output voltage is 0-1V, the output voltage of the humidity sensor is measured through an ADC voltage detection function in the singlechip, and the humidity value is converted to realize humidity measurement; and humidity data comparison and acquisition are realized through two humidity sensor interfaces on the overhauling instrument shell, and the humidity data are displayed through a liquid crystal screen.

Further, the air pressure sensor adopts a digital air pressure sensor, the values of the air pressure sensor are respectively read through two air pressure sensor interfaces on the overhauling instrument shell, air pressure data comparison and acquisition are realized, and data are displayed through the liquid crystal screen.

Further, the wind direction sensor outputs seven-bit Gray codes, and whether an output signal of a Gray code disc is normal or not is detected; the wind direction interface on the overhauling instrument shell is connected with the signal of the wind direction sensor, and then connected with the output end of each gray code signal line through a triode, and then drives the LED lamp to display;

When a signal is output, the trigger transistor lights up the LED lamp, and each Gray code output line corresponds to one LED lamp.

Further, the measuring range of the wind speed sensor is 0-60 m/s, the frequency range is 0-1221 Hz, signal acquisition is carried out by adopting interruption of a singlechip or high-low level detection, the wind speed value is detected according to a table look-up method, and whether the wind speed sensor fails or not is judged by observing the output value.

Further, the lithium battery power supply system also comprises a power supply module, wherein the power supply module comprises an external power supply for supplying power and a lithium battery for supplying power;

The lithium battery is powered by a 12V regulated power supply through a charging port on the overhauling instrument shell, or by a 12V storage battery.

The utility model has the beneficial effects that:

1. The overhaul instrument disclosed by the utility model has the advantages that the overhaul functions of other sensors are simultaneously considered, and the overhaul instrument is convenient to carry; simultaneously, the emergency power interface of this novel design can use automatic weather station battery power supply under the circumstances that does not have the electricity.

2. The novel overhaul instrument can judge whether the numerical values of the temperature sensor, the humidity sensor and the air pressure sensor of the automatic weather station in the national area are distorted or not through a data comparison method; when the detected temperature sensor, the humidity sensor, the air pressure sensor and the calibrated temperature sensor, the humidity sensor and the air pressure sensor are simultaneously connected to the interface of the overhauling instrument, the display screen can display the numerical values of the measured sensor and the calibrated sensor. If the temperature of the related numerical deviation is +/-0.2 ℃, the humidity is +/-2%, and the air pressure is +/-1 Pa, the sensor can be considered to be normal, otherwise, the sensor is judged to be abnormal, and the sensor needs to be replaced in time.

3. The maintenance instrument can detect the on-off condition of the circuit and make judgment prompts. Meanwhile, the solar panel voltage detection device has a voltage detection function and can detect storage battery voltage, solar panel output voltage, solar controller output voltage and the like.

4. The maintenance appearance cooperation funnel of draining can realize tipping bucket formula rain gauge and check the calibration function. Replaces the current heavy JJS2 rainfall calibrator.

5. The maintenance appearance set up two air pressure sensor interfaces, two temperature sensor interfaces and two humidity transducer interfaces, through the regional automatic weather station sensor of contrast and laboratory standard sensor that have checked in the same environment, the data of same time judge equipment good or bad.

Drawings

FIG. 1 is a schematic block diagram of an area automatic weather station inspection and maintenance instrument according to the present utility model;

FIG. 2 is a schematic view of the appearance of an area automatic weather station inspection and maintenance instrument according to the present utility model;

FIG. 3 is a circuit diagram of voltage detection;

FIG. 4 is a circuit diagram of a circuit on-off detection;

FIG. 5 is a schematic view of a water container for use with an area automatic weather station inspection and maintenance instrument of the present utility model.

In the figure: 1. wind direction sensor interface, 2, temperature sensor interface, 3, humidity transducer interface, 4, menu operation button, 5, emergent interface that charges, 6, switch, 7, wind speed sensor interface, 8, rainfall sensor interface, 9, air pressure sensor interface, 10, liquid crystal display, 11, function button, 12, voltage detection pen interface, 13, on-off detection pen interface, 14, drain funnel cavity, 15, drain tap.

Detailed Description

Referring to fig. 1 to 5, the present embodiment describes an area automatic weather station checking and repairing instrument, and the present embodiment adopts a mainstream STM32 singlechip as a core singlechip to realize a series of functions such as data reading, processing, control, output, communication, display, etc. Meeting the project requirements. And has a further space for upgrading. The overhauling instrument can basically solve the detection requirement of the electronic circuit required in overhauling, maintaining and checking of the regional automatic weather station. Has the characteristics of convenient carrying, complete functions and the like. The main object of the overhauling instrument according to the embodiment is an automatic weather station of DZZ model DZZ of aerospace new weather company.

The inspection and repair instrument according to the present embodiment has the following functions as shown in table 1.

TABLE 1

Specific hardware circuits of the overhauling instrument are designed aiming at the functions of the table 1;

in the embodiment, the overhauling instrument adopts an STM32 singlechip as a control core, wherein the STM32 is a 32-bit micro singlechip developed by ST company based on an ARMCortex-M kernel. STM32 is commonly used in the embedded arts. Such as intelligent vehicles, unmanned aerial vehicles, robots, wireless communications, and internet of things entertainment electronics. STM32 is powerful, excellent in performance, rich in on-chip resources, low in power consumption and is a classical embedded micro-singlechip. In this embodiment, an STM32F103V series chip is specifically used. The chip characteristics are as in table 2:

TABLE 2

As shown in fig. 1, the regional automatic weather station checking and overhauling instrument according to the embodiment comprises an overhauling instrument shell, a singlechip arranged in the shell, a constant current source circuit, a humidity sensor, an air pressure sensor, a wind direction sensor, a wind speed sensor, a rainfall sensor, a voltage detection circuit and a buzzer, wherein the constant current source circuit, the humidity sensor, the air pressure sensor, the wind direction sensor, the wind speed sensor, the rainfall sensor, the voltage detection circuit and the buzzer are electrically connected with the singlechip;

As shown in fig. 2, a functional ammonium key 11 and a liquid crystal display screen 10 are arranged on the shell, and the functional ammonium key 11 and the liquid crystal display screen 10 are electrically connected with the single chip; the shell is also provided with two temperature sensor interfaces 2, two humidity sensor interfaces 3, two air pressure sensor interfaces 9, a rainfall sensor interface 8, a wind direction sensor interface 1 and a wind speed sensor interface 7;

The liquid crystal screen can be connected with the singlechip in a parallel port or serial port mode, and is responsible for displaying related data through control of the singlechip.

The buzzer controls a triode to drive through the singlechip, and mainly plays a role in key prompt, on-off prompt and power supply voltage alarm functions in the system.

In the embodiment, the shell of the overhauling instrument is made of a shockproof, waterproof and low-temperature and high-temperature resistant (-10 ℃ to 85 ℃) silica gel material. Two temperature sensor interfaces 2, two humidity sensor interfaces 3 and two air pressure sensor interfaces 9 are arranged on the shell, and data comparison can be carried out on an automatic weather station sensor and a portable 'standard device'.

In the embodiment, the rainfall sensor interface 8 is used for connecting a rainfall line connector in the collecting box, and when the rainfall sensor of the regional automatic weather station turns over once, the instrument can record 0.1mm rainfall. When 10mm of water (314.16 ml) is poured into the gauge, it is necessary to calibrate the rain sensor if the counter is 10mm and not within + -3% error.

The rainfall signal is the on-off detection of a circuit, the detected rainfall value of the primary signal is 0.1mm, and the on-off accumulated number of the rainfall sensor can be calculated through interruption detection or switch signal detection.

The rainfall count adopts switch detection to break, is similar to the on-off detection, and only when the high level is detected, the singlechip accumulates +1, and a signal is sent to the sensor for representing 0.1 millimeter.

The wind direction sensor interface 1 is used for detecting a wind direction sensor, firstly, the data are cleared, and when the wind direction sensor rotates for one circle (360 degrees), if a certain line indication bit or 0 is found to indicate that no signal is received, the sensor can be judged to be damaged.

The wind speed sensor interface 7 is used for detecting a wind speed sensor, and if the rotating wind speed sensor does not find the frequency signal or the frequency signal is abnormal, the wind speed sensor can be judged to be damaged.

The voltage detection meter pen interface 12 and the on-off detection meter pen interface 13 are used for connecting meter pens and detecting the voltage of equipment of an automatic weather station and the on-off state of a circuit, if the circuit is on, a buzzer can send a prompt signal, and if the circuit is off, the buzzer can not send a signal.

In the embodiment, 7 function keys read key values through an I/O port of the singlechip, and identify corresponding functions to operate a maintenance instrument menu.

The home page key enters a checking mode, two comparison values of temperature, humidity and air pressure can appear, the wind direction and the wind speed enter a detection mode, and the detection condition is displayed in real time;

the return is to return to the homepage interface in any mode;

Detecting a reset key: resetting according to detection in any mode, detecting again by the overhauling instrument, namely resetting the rainfall detection data to restart counting, and detecting the data again by the temperature and the humidity;

The on-off detection button enters the circuit on-off detection, if the circuit is a through buzzer, the buzzer alarms, and the display screen has a text prompt;

The voltage detection key enters a voltage detection mode, can measure voltage and is displayed on the liquid crystal screen;

And the collector mode key is used for entering the collector mode to read the 6 element sensor data and displaying the 6 element sensor data on the liquid crystal screen. One data refresh is achieved for 5 seconds.

Backlight key: backlight for turning on or off the display screen;

The emergency charging interface 5 is consistent with the type of the storage battery socket of the regional automatic weather station, and the 12V storage battery of the automatic weather station can be used for supplying power to the detector in an emergency state. A direction button for instrument menu operation.

In this embodiment, temperature data is acquired by comparing two temperature sensor interfaces 2, and the temperature sensor adopts a TL431 chip for the constant current source circuit, and the current is modulated to 1mA. The current can obtain a voltage value with a certain linear relation with temperature after passing through a four-wire PT100 platinum resistor temperature measuring circuit, the voltage fed back by the PT100 platinum resistor is amplified by an operational amplifier circuit of an integrated instrument amplifier ADC623 chip, then the voltage value is read by an ADC function of an STM32 singlechip, the actual resistance value of the PT100 can be calculated according to the measured voltage value and current value, and the actual temperature value can be obtained by using a table look-up method after the voltage value is fed back to the singlechip and the temperature value corresponding to the actual voltage is found out. The temperature value of the second temperature sensor can be acquired in the same way and displayed on the liquid crystal screen.

In this embodiment, the measurement range of the humidity sensor is 0-100% rh, the corresponding sensor output voltage is 0-1V, the sensor output voltage is measured by using the ADC voltage detection function of the STM32 singlechip, and the humidity value is calculated according to the linear relationship between the detected voltage value and the actual humidity value, so as to realize humidity measurement. And humidity data comparison and acquisition are realized through two humidity sensor interfaces arranged on the shell, and the humidity data are converted into humidity values to be displayed on a screen.

In this embodiment, the air pressure sensor adopts a digital air pressure sensor which is used more at present, and is connected to a communication interface of the digital air pressure sensor through an RS232 serial port of the singlechip to directly read the air pressure value. Namely: the air pressure sensor is serial communication, two serial ports are arranged on the singlechip, the values of the air pressure sensor are respectively read through the two air pressure sensor interfaces on the shell, and data are displayed through the liquid crystal screen. And the air pressure data is acquired in a comparing way.

In this embodiment, the wind direction sensor mainly outputs 7-bit gray codes, and whether the sensor is normal is determined by detecting a gray code disc output signal. The wind direction data output end is connected to the signal interface of the wind direction sensor of the overhauling instrument and then directly connected to the high-impedance I/O port of the singlechip. When a signal is output, the signal is immediately detected by the singlechip, then the value on the corresponding data channel is displayed through the liquid crystal display, the high-level display of 1 and the low-level display of 0 are detected, and the gray code detection function is realized.

The wind direction detection is actually high-low level detection of a 7-bit circuit, a detected port is directly connected to 7 high-impedance I/O ports of the singlechip, and the level of 7-bit data on the corresponding I/O ports is directly read through the singlechip. After the wind direction sensor rotates for one circle, if a certain data bit is found that the high level output is not detected or the signal is not changed, the abnormal occurrence of circuit faults of a certain Gray code circuit signal can be judged.

In the embodiment, the measuring range of the wind speed sensor is 0-60 m/s, the frequency range of the output of the sensor is 0-1221 Hz, signal acquisition is performed by using interruption of a singlechip or high-low level detection, and the wind speed value is converted according to a table look-up method or a formula method. And judging whether the equipment is good or not by observing the output value.

Namely: the frequency of detecting the high level in one second is counted by using interruption of the singlechip, and the wind speed can be calculated according to the linear relation between the frequency and the wind speed value. And judging whether the sensor is good or not by detecting whether the wind speed value exists or not.

As shown in fig. 3, in this embodiment, the voltage detection circuit is mainly used for detecting a regional station circuit, generally, the maximum voltage is not more than 25V, the detected voltage is modulated to be less than or equal to 3.3V by the voltage division circuit, the detected voltage is measured by using a high-precision ADC or other ADC chips of the single chip microcomputer, the actual voltage value is 8 times of the detected voltage value according to the circuit design, and the actual voltage value can be displayed on the liquid crystal screen by counting. As shown in fig. 3, detection is a detected voltage, and stm32_adc1 is a voltage value after modulation voltage division. The actual detected voltage is 8 times the voltage value after modulation voltage division.

In this embodiment, the on-off detection of the line is similar to the detection of the switch, providing a high signal to the circuit, and the detected terminal is a pass if high and is an open if no high is detected. And the buzzer is driven by the singlechip to alarm and display related detection results. As shown in fig. 4, TEST1 and TEST2 are TEST-end pens, and are directly connected to two ends of the tested line, for example: and the input end and the output end of the rainfall data line of the automatic weather station are connected to the area, if the alarm of the buzzer indicates that the device is on, and if the buzzer does not sound the indication that the device is off. The detection end TEST_STM32 is directly connected with the TEST2 and is connected with a detection I/O port of the master control singlechip, when a detected circuit is on (the resistance value of the detected circuit can be considered to be approximately 0 ohm), the TEST_STM32 is at a high level, meanwhile, the master control singlechip can drive a buzzer to give an alarm to prompt, and if the circuit is off (the resistance value of the detected circuit can be considered to be infinite), the TEST_STM32 is at a low level, and the buzzer does not sound. The on-off condition of the circuit can be judged by detecting the high and low levels through the master control singlechip.

In the embodiment, the power supply device further comprises a power supply module, wherein the power supply module comprises external power supply of a storage battery and power supply of a lithium battery;

The storage battery is externally connected with power supply: according to the model of the storage battery interface, a corresponding interface is configured on the port of the overhauling instrument, so that the storage battery of the regional automatic weather station can be used as a power supply of the overhauling instrument. Meanwhile, a proper power supply conversion chip is used, so that the power supply voltage is ensured to be matched with the overhauling instrument.

The lithium battery is adopted for power supply: the maintenance instrument is mainly powered by a lithium battery, is charged by a 12V regulated power supply, and can be charged by a 12V storage battery. A suitable volume of polymer lithium battery is used to power the device according to its size.

In this embodiment, the lithium battery is a 3S lithium battery, the power supply voltage is greater than 12V, and the voltage is converted by using a 12V and 3.3V voltage stabilizing chip to supply power to the singlechip (main control chip) and the detected sensor, and meanwhile, an external balance charger is used for supplying power. The lithium battery can be directly connected with a charging interface on the overhauling instrument shell, the charging interface is a 12V charging interface, and the battery of the automatic weather station can be used for emergency power supply in an emergency state.

In the embodiment, the device also comprises a detection line and a water discharge funnel which are matched with the overhauling instrument;

The rainfall detection circuit is connected with the overhauling instrument in a plug-in mode. The detection line detection end adopts the crocodile clamp mode, can directly clamp the wiring terminal of the rainfall sensor, does not need to detach the rainfall sensor from a line, and ensures the stability of equipment.

As shown in fig. 5, the drain funnel is designed separately from the service instrument. After the use is finished, the overhauling instrument can be installed in the water discharging funnel cavity 14. The drain funnel can change the drain flow by replacing the drain nipple 15. Under the condition of taking water from a standard 10mm rain gauge measuring cup, a large-hole water outlet nozzle of a water outlet funnel corresponds to a large rainfall level (4 mm/min), a small-hole water outlet nozzle corresponds to a small rainfall level (1 mm/min) so as to ensure that water flow is released according to two modes of large rainfall and small rainfall in standard requirements, the water flow is matched with a tipping bucket rain gauge water outlet funnel interface, the tipping bucket rain gauge water outlet funnel is directly arranged on a tipping bucket rain gauge sensor, the water outlet funnel mainly aims at stably discharging water which is arranged on the rain gauge sensor, and the minimum volume is more than 314.16ml. Meanwhile, the space of the water discharging funnel can be filled into the overhauling instrument, so that the volume of carrying objects can be reduced.

The maintenance instrument according to the present embodiment can realize the functions of checking 6 weather sensors (DZZ, a wind direction sensor, a wind speed sensor, a rainfall sensor, a humidity sensor, a temperature sensor, and an air pressure sensor of a six-element area automatic weather station) of an area automatic station and maintaining an area automatic weather station circuit.

The overhauling instrument of the embodiment can adopt other chips with the same function to replace STM32 chips, and can also adopt batteries of other types to replace lithium batteries. For the setting of the function keys on the shell, keys can be added and reduced, and the positions of the wiring ports or the keys can be adjusted to realize the control of the device in the embodiment. The related wiring terminals such as temperature, humidity, air pressure, rainfall, wind direction, wind speed and the like can be arranged at any position of the overhauling instrument such as the front surface, the back surface and the side surface. Related keys such as a home page, a return key and a voltage detection key are timely canceled, and the control of the equipment can be realized by selecting the left direction key. Meanwhile, the equipment can be operated through the touch screen under the condition that no key is provided. The positions of the keys and the interfaces can be adjusted according to the needs, and the positions can be increased or decreased according to the needs.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. The regional automatic weather station checking and overhauling instrument comprises a singlechip, a temperature sensor, a humidity sensor, a wind direction sensor, a wind speed sensor, a rainfall sensor and a voltage detection circuit which are electrically connected with the singlechip; the method is characterized in that: the air pressure sensor and the buzzer are electrically connected with the singlechip;

Two temperature sensor interfaces, two humidity sensor interfaces and two air pressure sensor interfaces are arranged on the overhauling instrument shell; the system is respectively used for being connected with a temperature sensor, a humidity sensor, an air pressure sensor and a standard temperature sensor, a standard humidity sensor and a standard air pressure sensor of an automatic weather station, and the measured sensor and the numerical value of each standard sensor are displayed through a liquid crystal screen of the shell.

2. An area automatic weather station inspection and maintenance instrument according to claim 1, wherein: the rain sensor interface is arranged on the overhauling instrument shell and is connected with a rain sensor wiring terminal in the automatic weather station collecting box; or a detection line is adopted, one end of the detection line is connected with the rain sensor interface of the overhauling instrument in a plug-in mode, and the other end of the detection line is connected with the wiring terminal of the rain sensor in a crocodile clip mode.

3. An area automatic weather station inspection and maintenance instrument according to claim 1, wherein: the voltage detection circuit comprises a resistor R1 and a resistor R2;

The detected voltage end is connected with one end of a resistor R1, and the other end of the resistor R1 is connected with one end of a resistor R2 and the voltage end after voltage division; the other end of the resistor R2 is grounded;

The voltage detection circuit modulates the detected voltage to be less than or equal to 3.3V through the voltage division circuit, and measures the detected voltage through an ADC chip in the singlechip to obtain the detected voltage value.

4. An area automatic weather station inspection and maintenance instrument according to claim 1, wherein: the test_ST32 is connected with a detection I/O port of the singlechip by connecting the TEST pens TEST1 and TEST2 at two ends of the circuit, and when the detected circuit is a passage, the test_ST32 is at a high level; if the circuit is open, the TEST_STM32 is at a low level, and the buzzer does not sound; the on-off condition of the circuit is judged by detecting the high and low levels through the singlechip.

5. An area automatic weather station inspection and maintenance instrument according to claim 1, wherein: the temperature sensor adopts a constant current source circuit, and the circuit comprises a four-wire PT100 platinum resistor temperature measuring circuit and an operational amplifier circuit; the current obtains a voltage value in linear relation with temperature through a four-wire PT100 platinum resistor temperature measuring circuit, the operational amplifier circuit amplifies the voltage value, reads the voltage value after ADC conversion in the singlechip, obtains the resistance value of the four-wire PT100 platinum resistor according to the obtained voltage value and the obtained current value, and finally obtains the temperature value.

6. An area automatic weather station inspection and maintenance instrument according to claim 1, wherein: the measurement range of the humidity sensor is 0-100% RH, the output voltage is 0-1V, the output voltage of the humidity sensor is measured through an ADC voltage detection function in the singlechip, and the humidity value is converted to realize humidity measurement; and humidity data comparison and acquisition are realized through two humidity sensor interfaces on the overhauling instrument shell, and the humidity data are displayed through a liquid crystal screen.

7. An area automatic weather station inspection and maintenance instrument according to claim 1, wherein: the air pressure sensor adopts a digital air pressure sensor, the values of the air pressure sensor are respectively read through two air pressure sensor interfaces on the overhauling instrument shell, air pressure data comparison and acquisition are realized, and data are displayed through the liquid crystal screen.

8. An area automatic weather station inspection and maintenance instrument according to claim 1, wherein: the wind direction sensor outputs seven-bit Gray codes and detects whether the output signals of the Gray code disc are normal or not; the wind direction interface on the overhauling instrument shell is connected with the signal of the wind direction sensor, and then connected with the output end of each gray code signal line through a triode, and then drives the LED lamp to display;

When a signal is output, the trigger transistor lights up the LED lamp, and each Gray code output line corresponds to one LED lamp.

9. An area automatic weather station inspection and maintenance instrument according to claim 1, wherein: the measuring range of the wind speed sensor is 0-60 m/s, the frequency range is 0-1221 Hz, signal acquisition is carried out by adopting interruption of a singlechip or high-low level detection, the wind speed value is detected according to a table lookup method, and whether the wind speed sensor fails or not is judged by observing the output value.

10. An area automatic weather station inspection and maintenance instrument according to claim 1, wherein: also comprises a power supply module, wherein the power supply module is connected with the power supply module, the power supply module comprises an external power supply and a lithium battery;

The lithium battery is powered by a 12V regulated power supply through a charging port on the overhauling instrument shell, or by a 12V storage battery.