CN209803362U - Base measuring box of electronic sonde - Google Patents

Abstract

The utility model discloses an electronic sonde basic survey case, including quick-witted case, insert quick-witted incasement humiture detection room, insert quick-witted incasement humidity zero point detection room, baroceptor, data processor board, display, power and place the sonde support of waiting to examine the sonde. The advantages are that: the electronic sonde base measuring box provides reference standard values of temperature, humidity and air pressure of an L-waveband frequency modulation and amplitude modulation system electronic sonde, a GPS type electronic sonde and a Beidou type electronic sonde, and ensures the accuracy of the sonde in measuring meteorological information.

Description

Base measuring box of electronic sonde

Technical Field

The utility model relates to a high altitude meteorological detection field, concretely relates to electron sonde basic survey case.

background

The conventional high-altitude meteorological detection at home and abroad mainly adopts a secondary wind measuring radar and an electronic sonde system, the sonde balloon carries the electronic sonde to ascend to the air, and the meteorological information such as temperature, humidity, pressure and the like from the ground to the high altitude of 30 kilometers and 200 kilometers of a square circle is detected.

Before the electronic sonde is released, a sonde base measuring box is adopted to carry out ground base measurement, the temperature, the humidity and the pressure of the ground at normal temperature measured by the base measuring box are input into a meteorological radar data processing terminal, and are compared with the ground temperature, the humidity and the pressure data measured by the electronic sonde, the base value measurement qualified standard of the sonde is placed in radar software, and whether the ground is qualified or not can be automatically judged and corrected as long as the base measurement value is input into a computer. The qualified product is obtained within the error range, and the electronic sonde can be normally released.

At present, domestic electronic sonde base measuring boxes are not universal to various electronic sonde base measuring boxes, radars can be universal only by modifying and replacing computer software, and the humidity environment of the base measuring boxes is only in a normal temperature state.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an electronic sonde basic survey case, XED type electronic sonde basic survey case can provide five kinds of humidity environment of 0% RH, 13% RH, 33% RH, 75% RH and 95% RH, can be used to the improved generation sonde of L wave band sonde system, and satellite navigation sonde system electronic sonde ground basic value is surveyed.

The utility model adopts the technical proposal that: an electronic sonde base measuring box comprises a machine case, a temperature and humidity detecting chamber inserted into the machine case, a humidity zero point detecting chamber inserted into the machine case, an air pressure sensor, a data processor board, a display, a power supply and a sonde bracket for placing a sonde to be detected,

The sonde bracket is horizontally arranged on the outer side wall of one side of the case, the air pressure sensor is arranged in the case and communicated with the external atmosphere to measure the atmospheric pressure, the power supplies are all arranged in the case to supply power, the data processor board is arranged in the case, the display is arranged on the side wall of one side of the case, and the power supplies, the air pressure sensor and the display are respectively and electrically connected with the data processor board;

The temperature and humidity detection chamber comprises a temperature and humidity detection box, a water storage device, a first fan, a saturated salt tray and a wet-dry bulb thermometer for measuring humidity, the temperature and humidity detection box is arranged in the case, and a first test notch for inserting a temperature sensor and a humidity sensor on the sonde to be detected is formed in the temperature and humidity detection box; the water storage device is vertically inserted into the temperature and humidity detection box and locked on a box body of the temperature and humidity detection box through a first cap at the upper end, the first fan is arranged in the case, an air outlet of the first fan is opposite to the water storage device, a horizontal partition plate is arranged in the temperature and humidity detection box, a space is formed between the horizontal partition plate and the bottom of the temperature and humidity detection box and serves as a saturated salt tray chamber, two sides of the horizontal partition plate are supported on the inner side wall of the temperature and humidity detection box, one end of the horizontal partition plate is fixedly connected with the lower edge of a casing of the first fan, a space is reserved between the other end of the horizontal partition plate and;

the dry-wet bulb thermometer comprises two thermometers which are electrically connected with the data processor board; a thermometer for measuring temperature, defined as a dry bulb thermometer; another thermometer is wrapped by gauze soaked by distilled water in the ball part, and the lower end of the gauze is soaked in the distilled water to be defined as a wet ball thermometer; the dry bulb thermometer is inserted from a first test point arranged on the first cap, the wet bulb thermometer is inserted from a second test point arranged on the first cap, and the lower end of the gauze on the wet bulb thermometer is immersed in the distilled water in the water receiver;

The humidity zero detection chamber comprises a humidity zero detection box, a molecular sieve chamber box, a second fan and a clamping cup with a molecular sieve drying agent inside, the humidity zero detection box and the molecular sieve chamber box are fixed through a connecting channel and are arranged in the machine case, and a circulating air flow channel is formed between the humidity zero detection box and the molecular sieve chamber box through the connecting channel; the clamping cup is vertically inserted into the molecular sieve chamber box, the upper end of the clamping cup is locked on the molecular sieve chamber box through a second cap, the second fan is arranged in the molecular sieve chamber box and fixed on the inner side wall of the molecular sieve chamber box, the second fan is positioned under the clamping cup, and an air outlet of the second fan is opposite to the clamping cup;

and a second test notch for inserting the temperature sensor and the humidity sensor on the sonde to be detected is arranged on the humidity zero detection box.

To the preferred of the technical proposal of the utility model, a clapboard which divides the connecting channel into two parallel channels is arranged between the connecting channels.

It is right to the utility model discloses technical scheme's preferred, baroceptor is silicon resonance pressure sensor.

to the utility model discloses technical scheme's preferred, the thermometer adopts platinum resistance PT100 to measure, and platinum resistance PT100 adopts four-wire system to connect the method.

to the utility model discloses technical scheme's preferred, the output signal of thermometer all passes through differential amplifier and AD converting circuit and inserts the data processor board.

To the utility model discloses technical scheme's preferred, the power adopts LM2596 step-down switch type integrated voltage regulation chip.

The utility model has the advantages that:

the utility model discloses electron sonde basic survey case provides the temperature of L wave band frequency modulation amplitude modulation system electron sonde, GPS type and big dipper type electron sonde, humidity, the reference standard value of atmospheric pressure, guarantees the accuracy that the meteorological information was measured to the sonde.

Drawings

Fig. 1 is a perspective view of an electronic sonde base measuring box according to the embodiment.

Fig. 2 is a front view of the electronic sonde base-measuring box according to the embodiment.

Fig. 3 is a top view of the electronic sonde base-measuring box according to the present embodiment (a part of the upper case of the chassis is hidden in the figure).

Fig. 4 is a structural view of the temperature/humidity detection chamber.

Fig. 5 is a sectional view of a structure of the temperature/humidity detection chamber.

fig. 6 is a sectional view a-a of fig. 5.

Fig. 7 is a schematic block diagram of temperature measurement.

FIG. 8 is a circuit diagram of a platinum thermistor PT100 four wire connection.

fig. 9 is a schematic view showing the flow direction of the air in the temperature/humidity detection chamber.

Fig. 10 is a structural view of the humidity zero point detecting chamber.

Fig. 11 is a sectional view of the humidity zero point detecting chamber.

fig. 12 is a schematic flow diagram of the air flow of the humidity zero point detection chamber.

Fig. 13 is a circuit diagram of a power supply.

FIG. 14 is a block diagram of the components of an embodiment basebox.

FIG. 15 is a functional block diagram of an exemplary baseline box.

Detailed Description

The technical solution of the present invention is explained in detail below, but the scope of protection of the present invention is not limited to the embodiments.

In order to make the disclosure of the present invention more comprehensible, the following description is further made in conjunction with the accompanying drawings 1 to 15 and the detailed description.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

The test environment of the sonde sensor is divided into a test chamber and a humidity zero test chamber, and the humidity environment of the test chamber can be measured by placing different saturated salt solutions; and a drying agent is placed in the humidity zero test chamber to provide a humidity zero environment.

As shown in fig. 1 to 3, the electronic sonde-based measurement box in this embodiment includes a case 10, a temperature and humidity detection chamber 5 inserted into the case 10, a humidity zero point detection chamber 7 inserted into the case 10, an air pressure sensor 3, a data processor board 4, a display 6, a power supply 9, and a sonde holder 14 for holding a sonde 13 to be detected, where the sonde holder 14 is horizontally disposed on an outer sidewall of one side of the case 10, the air pressure sensor 3 is disposed in the case 10 and is communicated with the outside atmosphere to measure the atmospheric pressure, the power supply 9 is disposed in the case 10 to supply power, the data processor board 4 is disposed in the case 10, the display 6 is disposed on a sidewall of one side of the case 10, and the power supply 9, the air pressure sensor 3, and the display 6 are respectively electrically connected to the data processor board 4.

The air pressure sensor 3 is a silicon resonant pressure sensor. The silicon resonance pressure sensor has high precision, and the full compensation temperature range can reach +/-0.02 percent FS; high stability, which can reach +/-100 ppm FS/year; the temperature range is wide, and the measurement in the full temperature range of-40 ℃ to 85 ℃ can be realized.

As shown in fig. 4-6, in the electronic sonde-based test chamber of this embodiment, the temperature of the test chamber is measured using a platinum thermistor PT100, and the humidity is measured by the wet-dry-bulb method.

The temperature and humidity detection chamber 5 comprises a temperature and humidity detection box 5-1, a water storage device 5-2, a first fan 5-3, a saturated salt tray 5-4 and a wet-dry bulb thermometer for measuring humidity, the temperature and humidity detection box 5-1 is arranged in the case 10, and a first test gap 6-11 for inserting a temperature sensor and a humidity sensor on the sonde 13 to be detected is arranged on the temperature and humidity detection box 5-1; the water storage device 5-2 is vertically inserted into the temperature and humidity detection box 5-1 and is locked on the box body of the temperature and humidity detection box 5-1 through a first cap 6-10 at the upper end, the first fan 5-3 is arranged in the machine box, the air outlet of the first fan 5-3 is over against the water storage device 5-2, a horizontal partition plate 5-5 is arranged in a temperature and humidity detection box 5-1, a space is arranged between the horizontal partition plate 5-5 and the bottom of the temperature and humidity detection box 5-1 to serve as a saturated salt tray chamber, two sides of the horizontal partition plate 5-5 are supported on the inner side wall of the temperature and humidity detection box 5-1, one end of the horizontal partition plate 5-5 is fixedly connected with the lower edge of a casing of a first fan 5-3, a space is reserved between the other end of the horizontal partition plate 5-5 and the inner side wall of the temperature and humidity detection box 5-1, and a saturated salt tray 5-4 is arranged in the saturated salt. The wet and dry bulb thermometer comprises two thermometers which are both electrically connected with the data processor board 4; a thermometer for measuring temperature, defined as a dry bulb thermometer 6-8; another thermometer is wrapped by gauze soaked by distilled water in the ball part, and the lower end of the gauze is soaked in the distilled water, which is defined as a wet ball thermometer 6-9; the dry bulb thermometer is inserted from a first test point 5-6 provided on a first cap 6-10, the wet bulb thermometer is inserted from a second test point 5-7 provided on the first cap 6-10 and the lower end of the gauze on the wet bulb thermometer is immersed in distilled water in a water reservoir 5-2.

in the electronic sonde base test box of this embodiment, the temperature of the test chamber in the electronic sonde base test box is measured by a platinum thermal resistor PT100, and the humidity is measured by a dry-wet ball method. The humidity of the test chamber is measured by adopting a dry-wet ball method, and the humidity measurement principle is that under a certain wind speed, the moisture of wet gauze outside a wet ball is evaporated to take away the heat on a probe of a wet ball thermometer, so that the temperature of the probe is lower than that of ambient air; the actual temperature of the ambient air is measured by the dry bulb thermometer, and at the moment, the temperature difference between the wet bulb and the dry bulb has a corresponding relation with the relative humidity of the environment, and the relative humidity can be calculated, but the relation is nonlinear.

The electronic sonde base measuring box of the embodiment measures temperature by adopting a platinum thermal resistance PT100 thermometer, the platinum thermal resistance PT100 thermometer adopts a constant current source as an excitation source, the constant current source passes through the platinum thermal resistance thermometer, voltage drop is generated at two ends of a platinum resistor, the voltage is sent to an A/D converter after passing through a differential amplifier and converted into a digital signal, the digital signal is sent to a processor, and the temperature is calculated according to a platinum resistor calculation formula and displayed on a display 6 as shown in figure 7.

In the embodiment, the platinum thermistor PT100 adopts a four-wire connection method, which is a conventional connection method of the platinum thermistor PT 100. As shown in FIG. 8, the four-wire connection method not only adds an A/D sampling compensation line, but also adds an A/D ground compensation line, so that the measurement error can be further reduced, and the method can be used in occasions with longer temperature measurement distance.

The electronic sonde base measuring box of the embodiment is used for measuring humidity, and the humidity of the base measuring box is measured by a wet and dry bulb thermometer. A wet-dry bulb thermometer is an instrument for measuring air temp. and air humidity. The thermometer is composed of two identical thermometers, one thermometer is used for measuring the air temperature and is called a dry bulb thermometer; the other one is wrapped in gauze soaked in distilled water, and the lower end of the gauze is soaked in distilled water, which is called a wet bulb thermometer. According to the measured dry bulb temperature and wet bulb temperature, the 'wet air line graph' is checked, and the data of the temperature, humidity, specific heat, specific enthalpy, specific volume, water vapor partial pressure, heat, sensible heat, latent heat and the like of the air in the state can be obtained. From the measured values, the state changes of air heating, cooling, humidification and dehumidification can be calculated by referring to the psychrometric chart.

the saturated water vapor pressure and relative humidity are calculated by a wet-dry bulb hygrometer according to the following formula:

Calculation of saturated vapor pressure

According to the air temperature, calculating the saturated vapor pressure corresponding to the air temperature according to the formula 1:

In the formula: e (t) is the saturated vapor pressure (hPa) of the pure water level at the air temperature t; t1 ═ 273.16K (triple point temperature of water); t is 273.15+ T, and T is air temperature (deg.c).

Calculation of water vapour pressure

Calculating the water vapor pressure according to the saturated water vapor pressure and the relative humidity according to the formula 2:

In the formula: e is the water vapour pressure (hPa); u is relative humidity (%).

This embodiment further illustrates signal filtering

Due to external interference or some unpredictable factors, after the analog quantity is interfered, the result after A/D conversion deviates from the true value, some random errors may occur, and if the result is sampled only once, whether the result is credible or not cannot be determined. A data sequence of A/D conversion is obtained through multiple sampling, and a result with high reliability can be obtained after the data sequence is processed through a software algorithm. This method is digital filtering.

The selection of the data filtering method depends on the field environment and the object to be measured, the system adopts the filtering of the mean value of the elimination, and the arithmetic mean filtering can not eliminate the obvious pulse interference or larger error and can only weaken the influence. The sampling value is far away from the actual value due to obvious interference or larger error, the sampling value can be easily eliminated, and the sampling value does not participate in average value calculation, so that the output value of average filtering is closer to the actual value. The algorithm principle is as follows: and continuously sampling the voltage sampling values corresponding to the temperature signals for n times, accumulating and summing the voltage sampling values, simultaneously finding out the maximum value and the minimum value, subtracting the maximum value and the minimum value from the accumulated sum, and averaging according to n-2 sampling values to obtain the effective sampling value.

as shown in fig. 9, in the electronic sonde base measuring box, the stability and uniformity of the temperature and humidity in the measuring chamber in the temperature and humidity measuring chamber 5 are realized, the measuring area of the base measuring box adopts a double-layer structure, and the air is stirred by the first fan 5-3 in the cavity.

as shown in fig. 10 and 11, the humidity zero point detection chamber 7 includes a humidity zero point detection box 7-1, a molecular sieve chamber box 7-2, a second fan 7-7 and a card cup 7-5 with a molecular sieve desiccant inside, the humidity zero point detection box 7-1 and the molecular sieve chamber box 7-2 are fixed and placed in the machine case 10 through a connecting channel 7-3, and a circulating air flow channel is formed between the humidity zero point detection box 7-1 and the molecular sieve chamber box 7-2 through the connecting channel 7-3; a partition 7-9 dividing the connecting channel 7-3 into two parallel channels 7-8 is provided between the connecting channels 7-3. The clamping cup 7-5 is vertically inserted into the molecular sieve chamber box 7-2, the upper end of the clamping cup 7-5 is locked on the molecular sieve chamber box 7-2 through a second cap 7-4, the second fan 7-7 is arranged in the molecular sieve chamber box 7-2 and fixed on the inner side wall of the molecular sieve chamber box 7-2, the second fan 7-7 is positioned under the clamping cup 7-5, and an air outlet of the second fan 7-7 is opposite to the clamping cup 7-5; and a second test gap 7-6 for inserting a temperature sensor and a humidity sensor on the sonde 13 to be detected is arranged on the humidity zero point detection box 7-1.

As shown in fig. 11, in the electronic sonde-based box, the humidity zero point detection chamber 7, the second fan 7-7 agitates air and the desiccant to ensure the humidity zero degree stability of the humidity zero point detection chamber. And the humidity standard devices are respectively inserted into the second testing gaps 7-6, 10 groups of standard humidity values are recorded, and the standard deviation is counted to be the humidity uniformity error.

As shown in fig. 13, the power supply uses an LM2596 buck switching type integrated regulator chip. The LM2596 series is a 3A current output step-down switch type integrated voltage stabilizing chip produced by Texas Instruments (TI), which comprises a fixed frequency oscillator (150KHZ) and a reference voltage stabilizer (1.23v) and has perfect protection circuits, current limitation, thermal cut-off circuits and the like. The device can form the high-efficiency voltage stabilizing circuit by only needing few peripheral devices.

As shown in fig. 13, the output voltage can be adjusted by adjusting the voltage at the end of the LM2596 adjusting pin 4, the data processing board of the baseline measurement box outputs a voltage through the D/a, and the voltage is amplified and driven by the amplifier and then loaded to the end of the LM2596 adjusting pin 4, so that the digital adjustment of the power supply is realized.

The steps of the electronic sonde base survey box detection are as follows:

Temperature of

The temperature on the electronic sonde is a standard: an SWJ digital thermometer; the test equipment is a JHC-ZHF 70 type precision constant temperature tank or a constant temperature tank with the same specification.

testing points: 40 ℃, 20 ℃ and 0 ℃.

And placing the temperature measuring elements in a temperature standard test box, and sequentially setting the temperature of the temperature standard test box as the value of the temperature test point. After the numerical values of the temperature test points are stable, 10 groups of standard temperature values and the temperature values of the base test box are simultaneously recorded, the standard deviation is counted to be the temperature measurement error, the error value is input into the base test box through an operation interface of the base test box, and the software corrects the temperature data according to the error value.

Humidity

Saturated salt solution: lithium chloride, magnesium chloride, sodium chloride and potassium sulfate, wherein saturated salt solutions of the lithium chloride, the magnesium chloride, the sodium chloride and the potassium sulfate are used for generating several humidity environments of 13% RH, 34% RH, 75% RH and 98% RH respectively.

Respectively dissolving lithium chloride, magnesium chloride, sodium chloride and potassium sulfate saturated salt into a saturated salt tray in the saturated salt tray, recording 15 groups of humidity display values of the base measuring box after the humidity environment is stable, and counting standard deviation to obtain humidity measuring error.

Air pressure

the air pressure test point is as follows: 1050hPa, 1000hPa, 900hPa, 800hPa, 700hPa, 600hPa, 500 hPa.

And (3) placing the air pressure sensor of the base measuring box in a pressure temperature test box at room temperature, and sequentially controlling the pressure in the box to the numerical value of each air pressure test point. And after the numerical values of the test points are stable, 10 groups of standard air pressure values and the air pressure value of the tested object are recorded at the same time, and the standard deviation is counted to be the air pressure measurement error.

Temperature stability

Under the indoor normal temperature condition, after the starting is stable, the temperature data displayed by the base measuring box of the XED type electronic sonde is recorded every 1min, the data is collected five times, and the data fluctuation of two adjacent times meets the technical condition requirement.

Temperature uniformity

The method comprises the steps that 3 test points are arranged in a measurement area of a test chamber of an XED type electronic sonde base test box, after the XED type electronic sonde base test box is started stably, a temperature standard is inserted into the 3 test points respectively, temperature values of 3 positions are measured, 10 groups of standard temperature values are recorded after the numerical values of the test points are stable, and the standard deviation is counted to be a temperature uniformity error and to meet the technical condition requirement.

Stability to humidity

Under the indoor normal temperature condition, after the starting is stable, humidity data displayed by a base measuring box of the XED type electronic sonde is recorded every 1min, the data is collected five times, and the data fluctuation of two adjacent times meets the technical condition requirement.

Uniformity of humidity

After the electronic sonde base test box is started stably, the humidity standard device is inserted into 3 test points respectively, the humidity values of 3 positions are measured, after the numerical values of the test points are stable, 10 groups of standard humidity values are recorded, the standard difference is counted to be the humidity uniformity error, and the requirement of technical conditions is met.

voltage measurement

The measuring voltage is provided by a direct current stabilized power supply, the set voltage is 22V, the input voltage is measured by a digital three-purpose meter, and the output representation value of the three-purpose meter is 22V by adjusting a voltage output potentiometer.

Low temperature

and under the working condition, placing the XED type electronic sonde base measuring box in a temperature environment test box, switching on a power supply of the XED type electronic sonde base measuring box, controlling the temperature to be 5 ℃, working for 30min after the low-temperature test box is stable, and checking whether the XED type electronic sonde base measuring box can normally work.

And (4) storage conditions are carried out on the basis of working condition tests, the power supply of the base measuring box of the XED type electronic sonde is turned off, the temperature is reduced to-40 ℃, the temperature is kept for 8 hours, recovery is carried out, and whether the base measuring box of the XED type electronic sonde can normally work is checked after the temperature of the base measuring box of the XED type electronic sonde is balanced with the temperature in a laboratory.

High temperature

And under the working condition, placing the XED type electronic sonde base measuring box in a temperature environment test box, switching on a power supply of the XED type electronic sonde base measuring box, controlling the temperature to be 40 ℃, working for 30min after the high-temperature test box is stable, and checking whether the XED type electronic sonde base measuring box can normally work.

And (4) storage conditions are carried out on the basis of working condition tests, the power supply of the base measuring box of the XED type electronic sonde is turned off, the temperature is raised to 50 ℃, the temperature is kept for 8 hours, the recovery is carried out, and whether the base measuring box of the XED type electronic sonde can normally work is checked after the temperature of the base measuring box of the XED type electronic sonde is balanced with the temperature in a laboratory.

Damp-heat

And under the working condition, placing the XED type electronic sonde base measuring box in a temperature environment test box, switching on a power supply of the XED type electronic sonde base measuring box, firstly increasing the temperature to 30 ℃, then humidifying to 95% RH, working for 30min after the damp-heat test box is stable, and checking whether the XED type electronic sonde base measuring box can normally work.

And (4) storage conditions are carried out on the basis of working condition tests, the power supply of the base measuring box of the XED type electronic sonde is turned off, the humidity is kept unchanged, the temperature is raised to 40 ℃ and kept for 8 hours for recovery, and whether the base measuring box of the XED type electronic sonde can normally work is checked after the temperature and the humidity of the base measuring box of the XED type electronic sonde are balanced with the temperature and the humidity in a laboratory.

as shown in fig. 14, the electronic sonde base-side measuring box of the present embodiment is composed of: the device consists of a dry bulb thermometer, a wet bulb thermometer, an air pressure sensor, a data processing board, a display, a detection chamber, a humidity zero detection chamber, a power supply, a case, a saturated salt tray, a cable and accessories.

As shown in fig. 15, in the basic test box of the electronic sonde of the present embodiment, a test environment of a sensor of the sonde is divided into a test chamber and a humidity zero test chamber, and a humidity environment of the test chamber can be measured by placing different saturated salt solutions; and a drying agent is placed in the humidity zero test chamber to provide a humidity zero environment.

the functions and technical parameters of the electronic sonde base measuring box of the embodiment are as follows:

Function(s)

a) the relative humidity, temperature and atmospheric pressure values can be directly displayed, and the dew point temperature can be displayed through switching.

b) The base test box has the function of reading and writing the correction value of the standard device and has the function of setting the writing authority.

c) The output value (including temperature, air pressure and relative humidity value) of the base measuring box standard device can be transmitted to a computer of the ground signal receiving and processing system, the continuous change (the display resolution can be adjusted) of the output value can be displayed on the computer, and the frequency of the electronic sonde of the satellite navigation sonde system can be adjusted through the computer.

d) The state information (code, production date, verification date and the like) of the base measuring box can be automatically uploaded.

e) The basic test box is provided with a fault checking function, and can perform self-checking and fault alarming.

Technical parameters of base measuring box of electronic sonde

Temperature standard device

Measurement range: 0-40 ℃;

resolution: 0.01 ℃;

Maximum allowable error: plus or minus 0.1 ℃;

Temperature calibrator annual shift amount: less than or equal to 0.1 ℃.

Humidity standard device

The measuring range is 0 percent RH-95 percent RH;

Resolution: 0.1% RH;

Maximum allowable error: ± 2% RH, humidity standard annual drift: RH is less than or equal to 2 percent.

Air pressure standard device

measurement range: 450hPa to 1060 hPa;

Resolution: 0.1 hPa;

Maximum allowable error: 0.3 hPa;

Annual drift amount of air pressure standard: less than or equal to 0.3 hPa.

Test zone temperature field stability

≤0.1℃/min。

Temperature field uniformity in test area

≤0.1℃。

Test area humidity field stability

≤±2％RH/min。

uniformity of humidity field in test area

≤1％RH。

Output voltage

The base-measuring box must be able to provide the voltage values required by the sonde.

Voltage range: 15V to 15V, and the adjustment resolution is 0.5V.

Data output standard format

Network interface

The base detection box is connected and communicated with a computer or a sounding networking system through a network port, and the communication format is as follows: the base test box automatically sends 16-system data at 1 second intervals, command interaction can be carried out, relevant parameter setting is carried out, and the data format is as follows:

Table 1: network port transmission data format

table 2: network port transmission command and data

RS232 interface

The base measuring box is provided with an RS-232 interface which can be connected and communicated with an upper computer, and the communication format is as follows: 9600,8, n, 1. The detection box automatically sends 16-system data at 1-second intervals, and the data format is as follows:

TABLE 3 RS-232 interface data transmission format

Detection method for base detection of electronic sonde by using base detection box

The electronic sonde is subjected to base measurement by a sonde base measuring box before being released, a temperature and humidity pressure sensor and a measuring box in the electronic sonde are used for collecting meteorological temperature and humidity pressure data, a transmitting plate transmits the data, and when the humidity of the base measuring box reaches 70-85% RH and the temperature and humidity pressure data are stable, the ground temperature and humidity pressure data of the base measuring box are read and provided for meteorological radar base measurement, a radar receiving program is opened, and the frequency of a radar receiver is adjusted. The radar receiver can display the serial number of the sonde and carry out base measurement consistent with the serial number of the sonde, when the temperature and humidity pressure data measured by the sonde sensor in the base measurement box and the data measured by the base measurement box accord with an error range, the base measurement is qualified, and the ground meteorological parameter values are input to the meteorological radar data processing terminal to release the ball.

The standard for determining the qualification of the base value of the sonde is already put in software, and the base test data can be input into a computer to automatically judge whether the sonde is qualified or not, and if the sonde is qualified, the ball can be played.

Where not otherwise indicated herein, it will be appreciated that the invention is not limited to or by the prior art, but is capable of modifications and variations as will be apparent to those skilled in the art, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims (6)

1. The utility model provides an electronic sonde base survey case which characterized in that: comprises a case (10), a temperature and humidity detection chamber (5) inserted into the case (10), a humidity zero point detection chamber (7) inserted into the case (10), an air pressure sensor (3), a data processor board (4), a display (6), a power supply (9) and a sonde bracket (14) for placing a sonde (13) to be detected,

The sonde support (14) is horizontally arranged on the outer side wall of one side of the case (10), the air pressure sensor (3) is arranged in the case (10) and communicated with the outside atmosphere to measure the atmospheric pressure, the power supplies (9) are all arranged in the case (10) to supply power, the data processor board (4) is arranged in the case (10), the display (6) is arranged on the side wall of one side of the case (10), and the power supplies (9), the air pressure sensor (3) and the display (6) are respectively and electrically connected with the data processor board (4);

The temperature and humidity detection chamber (5) comprises a temperature and humidity detection box (5-1), a water storage device (5-2), a first fan (5-3), a saturated salt tray (5-4) and a wet and dry bulb thermometer for measuring humidity, the temperature and humidity detection box (5-1) is arranged in the case (10), and a first test gap (5-11) for inserting a temperature sensor and a humidity sensor on the sonde (13) to be detected is formed in the temperature and humidity detection box (5-1); the water storage device (5-2) is vertically inserted into the temperature and humidity detection box (5-1) and locked on the box body of the temperature and humidity detection box (5-1) through a first cap (5-10) at the upper end, the first fan (5-3) is arranged in the box body, the air outlet of the first fan (5-3) is right opposite to the water storage device (5-2), a horizontal partition plate (5-5) is arranged in the temperature and humidity detection box (5-1), a distance is reserved between the horizontal partition plate (5-5) and the bottom of the temperature and humidity detection box (5-1) to serve as a saturated salt tray chamber, two sides of the horizontal partition plate (5-5) are supported on the inner side wall of the temperature and humidity detection box (5-1), one end of the horizontal partition plate (5-5) is fixedly connected with the lower edge of the shell of the first fan (5-3), a distance is reserved between the other end of the horizontal partition plate (5, the saturated salt tray (5-4) is arranged in the saturated salt tray chamber;

the wet and dry bulb thermometer comprises two thermometers which are electrically connected with the data processor board (4); a thermometer for measuring temperature, defined as a dry bulb thermometer; another thermometer is wrapped by gauze soaked by distilled water in the ball part, and the lower end of the gauze is soaked in the distilled water to be defined as a wet ball thermometer; the dry bulb thermometer is inserted from a first test point (5-6) arranged on a first cap (5-10), the wet bulb thermometer is inserted from a second test point (5-7) arranged on the first cap (5-10), and the lower end of the gauze on the wet bulb thermometer is immersed in the distilled water in the water storage device (5-2);

The humidity zero detection chamber (7) comprises a humidity zero detection box (7-1), a molecular sieve chamber box (7-2), a second fan (7-7) and a clamping cup (7-5) with a molecular sieve drying agent inside, the humidity zero detection box (7-1) and the molecular sieve chamber box (7-2) are fixed through a connecting channel (7-3) and are placed in the machine case (10), and a circulating air flow channel is formed between the humidity zero detection box (7-1) and the molecular sieve chamber box (7-2) through the connecting channel (7-3); the clamping cup (7-5) is vertically inserted into the molecular sieve chamber box (7-2), the upper end of the clamping cup (7-5) is locked on the molecular sieve chamber box (7-2) through a second cap (7-4), the second fan (7-7) is arranged in the molecular sieve chamber box (7-2) and fixed on the inner side wall of the molecular sieve chamber box (7-2), the second fan (7-7) is positioned under the clamping cup (7-5), and the air outlet of the second fan (7-7) is opposite to the clamping cup (7-5);

And a second test gap (7-6) for inserting a temperature sensor and a humidity sensor on the sonde (13) to be detected is arranged on the humidity zero point detection box (7-1).

2. electronic sonde-based cabinet according to claim 1, characterized in that between the joining channels (7-3) there are provided partitions (7-9) which divide the joining channel (7-3) into two parallel channels (7-8).

3. Electronic sonde-based cabinet according to claim 1, characterized in that the barometric sensor (3) is a silicon resonant pressure sensor.

4. The electronic sonde-based measuring box of claim 1, wherein the thermometer is a platinum thermistor PT100, and the platinum thermistor PT100 is a four-wire connection.

5. Electronic sonde-based cabinet according to claim 4, characterized in that the output signals of the thermometers are each connected to the data processor board (4) via a differential amplifier and an A/D converter circuit.

6. The electronic sonde-based sonde of claim 1, wherein the power supply is an LM2596 buck switch type integrated voltage regulator chip.