Intelligent weighing type rainfall titration tester

Abstract

The utility model discloses an intelligent weighing type rainfall titration tester, which belongs to the field of rainfall monitoring equipment calibration, and comprises an instrument box, a water injection unit, a weighing unit and a control unit, the high-precision intelligent lifting electronic scale weighing metering unit is used for collecting the residual water weight of the water storage tank in real time and calculating the amount of the constant-flow measurement water sucked by the water injection unit; and the display control unit is used for controlling operations such as instrument parameter setting, calibration, verification, operation, titration, error evaluation, field titration process data printing and the like, and displaying various data. According to the invention, a high-precision electronic scale and a constant-flow water pumping principle of a filling pump are utilized, so that the uncertainty of field calibration caused by personal errors due to the fact that the water injection speed of manual titration is difficult to control is eliminated; by utilizing the real-time weighing function of the high-precision electronic scale, the tedious operation process that the peristaltic pipe is influenced by temperature and needs to be calibrated on site for multiple times is overcome.

Description

Technical Field

[0001] The utility model relates to the field of rainfall monitoring equipment, in particular to an intelligent weighing type rainfall titration tester. Background Art

[0002] The method of collecting precipitation data using automatic rain gauges has been widely used in the hydrology, water conservancy and other industries. However, for the on-site calibration and testing tools for the accuracy of rainfall collection, the rain gauge titration test is usually performed manually using a special measuring cup. Since the titration water injection speed is difficult to control and there are different understandings of the titration method and error assessment requirements, there are problems such as human operation errors and non-standard error assessment in the titration test, which leads to inaccurate precipitation collection. For the pump tube metering method, since the pump tube is affected by temperature, the on-site calibration takes a long time and is an indirect measurement. This product uses a high-precision intelligent lifting electronic scale for direct measurement to achieve high-precision measurement of the rain sensor, which can realize high-precision calibration of the rain sensor titration error, and can also measure the single measurement error, which is convenient for the sensor to be quickly and accurately adjusted. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the above-mentioned traditional technology and provide a device used in the field of hydrology, water conservancy and flood prevention warning and forecasting systems, and used for on-site detection and calibration of errors of automatic rainfall collection sensors in the field, namely, an intelligent weighing rain titration tester, to improve the accuracy of on-site detection and calibration of measurement of automatic rainfall collection sensors in the field.

[0004] The purpose of this utility model is achieved through the following technical measures:

[0005] An intelligent weighing rain titration tester includes an instrument box, which is composed of an instrument box body and an instrument box cover, and is characterized in that: the instrument box is provided with:

[0006] A water injection unit, used for providing a constant flow of measuring water to the rainfall sensor;

[0007] High-precision intelligent lifting electronic scale weighing and metering unit, used to collect the remaining water weight in the water storage tank in real time and calculate the amount of constant flow measurement water sucked out by the water injection unit;

[0008] Display control unit, used to control instrument parameter setting, calibration, verification, operation, titration, error evaluation, on-site titration process data printing and other operations, and display various data;

[0009] Power supply unit, provides power to the instrument.

[0010] As a preferred solution, the water injection unit includes an injection pump, a peristaltic tube, an inlet silicone water pipe, an outlet silicone water pipe and a water storage tank. The injection pump is installed in the instrument box, and the peristaltic tube is installed on the injection pump and is used to transport water for measurement; the two ends of the peristaltic tube are respectively connected to the inlet silicone water pipe and the outlet silicone water pipe, and the inlet end of the inlet silicone water pipe is placed in the water storage tank, and the water storage tank is used to store water for measurement. The outlet end of the outlet silicone water pipe is hung on the rain receiving port of the rainfall sensor to be measured through a hook, and water is injected into the rainfall sensor at a set speed and constant flow.

[0011] This professional instrument for rain gauge titration testing uses the constant flow pumping principle of the perfusion pump. A high-precision electronic scale collects the remaining water weight in the water tank in real time to calculate the amount of water sucked out, which is converted into titration water volume according to the diameter of the rain sensor. The constant flow injection speed is achieved by controlling the pumping speed of the perfusion pump, thereby automatically evaluating the rain sensor titration error according to relevant requirements.

[0012] As a preferred solution, the display control unit includes an LCD display control unit, a sensor metering pulse signal acquisition interface and a data export interface, the LCD display control unit includes a single-chip microcomputer, a memory, an LCD display screen and a thermal printer, the LCD display screen is integrated on the instrument box cover, and the sensor metering pulse signal acquisition interface, the data export interface and the thermal printer are placed on the instrument box body; the single-chip microcomputer is used to control the pumping speed of the peristaltic pump, the metering of the water output of the high-precision intelligent lifting electronic scale weighing and metering unit, and the storage of various parameters and test data; the LCD display screen controls the instrument's parameter setting, calibration, verification, operation, titration, error assessment, on-site printing of test data and other operations through touch, and displays various types of data.

[0013] The equipment is composed of a single-chip microcomputer and memory to complete the pumping speed of the peristaltic pump, the measurement control of the water sucked out by the electronic scale, and the storage of various parameters and test data. The LCD display screen controls the instrument's parameter setting, calibration, verification, operation, titration, error evaluation and other operations, and displays various data and prints test data on site.

[0014] The instrument box is provided with a thermal printer, which can print the titration test process data of the rainfall sensor in real time on site; the test process data can also be saved after the current or previous titration. The titration test data includes the titration start and end time, titration time, titration water volume, titration absolute error of each pulse signal, total titration absolute error and relative error, etc.

[0015] As a preferred solution, the high-precision intelligent lifting electronic scale weighing and metering unit includes a lift bracket, an intelligent lifting system, a lifting tray, an electronic scale pan and an electronic scale. The lift bracket is placed in an instrument case. The electronic scale pan is used to place a water tank. The upper part of the water tank is provided with a box edge that can be placed on the instrument case. The intelligent lifting system is placed on the lift bracket. The intelligent lifting system is used to switch the electronic scale between weighing and weightless states.

[0016] As a preferred solution, the intelligent lifting system includes a spiral screw, a nut, a motor and a mounting base. The intelligent lifting system is installed on the lifting machine bracket through the mounting base. The motor drives the spiral screw to rotate and causes the nut mounted on the spiral screw to be rotated to achieve lifting. The nut is connected to the lifting tray. When the lifting tray lifts the electronic scale pan and the water tank, the electronic scale is in a weighing state. When the electronic scale pan is lowered to separate the scale pan from the water tank, the electronic scale is in a weightless state. In the weightless state, the edge of the water tank is placed on the instrument case and is out of contact with the electronic scale pan.

[0017] This product adds a high-precision electronic scale real-time measurement and calibration method based on the existing pump tube measurement and calibration method. In order to avoid measurement drift caused by long-term load-bearing of the electronic scale, an intelligent lifting system for the electronic scale is specially developed, so that the electronic scale automatically enters the weighing state when calibration and titration are required, and it will automatically enter the weightless state after completing the calibration and titration detection. This product has a high degree of intelligence. When the pre-stored water volume is insufficient during calibration, it will automatically sound a prompt and suspend the calibration. After water is replenished, the unfinished calibration can be continued, which can avoid unnecessary repeated calibration work. When the titrator is displaced during the titration process and the inclination angle of the equipment changes, the current calibration will be automatically terminated and accompanied by an audio alarm prompt. At this time, it is necessary to re-enter the new calibration process.

[0018] As a preferred solution, the power supply unit includes a built-in lithium battery and a charging adapter, the built-in lithium battery provides power to the device, and the charging adapter charges the built-in lithium battery.

[0019] As a preferred solution, the instrument case is provided with a sensor metering pulse signal acquisition interface and a data export interface, the sensor metering pulse signal acquisition interface is connected to the device to be tested and collects the metering pulse signal of its rainfall sensor; the data export interface is used to export test data.

[0020] After calibration, the titration results of the rain sensor at this station will be automatically sent to the preset central platform through the 4G channel while the titration process data is saved. The titration process data of the rain sensor at each station can be downloaded to the computer through the RS-232 interface for data compilation and work filing.

[0021] Due to the adoption of the above technical solution, compared with the prior art, the advantages of the utility model are:

[0022] The utility model discloses an intelligent weighing rain gauge titration tester, which utilizes a high-precision electronic scale and a constant-current water pumping principle of an infusion pump to eliminate the uncertainty of on-site calibration caused by human errors due to the difficulty in controlling the manual titration water injection speed. The real-time weighing function of a high-precision electronic scale is utilized to overcome the cumbersome operating process of multiple on-site calibrations required due to the influence of temperature on the peristaltic tube. When an unpredictable special situation causes the electronic scale to malfunction, the existing pump tube metering method can be used to complete the on-site rain gauge titration calibration. This product standardizes and unifies the error assessment standards, thereby improving the accuracy of precipitation collection. It provides a more reliable decision-making basis for improving the accuracy of flood warning forecasts. This product can be used for on-site calibration of pulse and digital output rain gauges of various resolutions, such as tipping bucket type, weighing type, magnetic pole type, etc.

[0023] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Attached Figure 1 The utility model is a schematic diagram of the overall structure of an intelligent weighing rain titration tester.

[0025] Attached Figure 2 The utility model is a schematic diagram of the structure of a high-precision automatic lifting weighing device in an intelligent weighing rain titration tester.

[0026] Attached Figure 3 It is a structural schematic diagram of the high-precision automatic lifting weighing device of the utility model and a water storage tank in a weightless state.

[0027] Attached Figure 4 It is a structural schematic diagram of the high-precision automatic lifting weighing device of the utility model and a water storage tank in a weighing state.

[0028] In the figure: 1. Instrument case; 2. Instrument case cover; 3. Weights; 4. Measuring cup; 5. Level; 6. Thermal printer; 7. Water filling unit; 8. Sensor measurement pulse signal acquisition interface; 9. Data export interface; 10. LCD display screen; 11. Operation status indicator light; 12. Operation status prompt sound; 13. Power switch; 14. Power charging interface; 15. Water tank slot; 16. Water tank; 17. Electronic scale pan; 18. Intelligent lifting system; 19. Electronic scale; 20. Lifting tray; 21. Lifting bracket; 22. Mounting base; 23. Screw rod; 24. Nut; 25. Motor. DETAILED DESCRIPTION

[0029] Example: Figures 1 to 4As shown, an intelligent weighing rain titration tester includes an instrument box, the instrument box is composed of an instrument box body 1 and an instrument box cover 2, and the instrument box is provided with:

[0030] A water injection unit 7, used to provide a constant flow of measurement water to the rainfall sensor;

[0031] A high-precision intelligent lifting electronic scale weighing and metering unit is used to collect the remaining water weight of the water storage tank 16 in real time and calculate the amount of constant flow measurement water sucked out by the water injection unit 7;

[0032] Display control unit, used to control instrument parameter setting, calibration, verification, operation, titration, error evaluation and other operations, and display various data;

[0033] Power supply unit, provides power to the instrument.

[0034] The water injection unit 7 includes an injection pump, a peristaltic tube, an inlet silicone water pipe, an outlet silicone water pipe and a water storage tank 16. The injection pump is installed in the instrument case 1. The peristaltic tube is installed on the injection pump and is used to transport water for measurement. The two ends of the peristaltic tube are respectively connected to the inlet silicone water pipe and the outlet silicone water pipe. The inlet end of the inlet silicone water pipe is placed in the water storage tank 16. The water storage tank 16 is used to store water for measurement. The instrument case 1 is provided with a water storage tank slot 15. The water storage tank 16 is placed in the water storage tank slot 15 on the instrument case 1. The outlet end of the outlet silicone water pipe is hung on the rain receiving port of the rainfall sensor to be measured through a hook, and water is injected into the rainfall sensor at a set speed. The injection pump, peristaltic tube and inlet and outlet pipes are prior art and will not be repeated.

[0035] This professional instrument for rain gauge titration testing uses the constant flow pumping principle of the perfusion pump. A high-precision electronic scale collects the remaining water weight in the water tank in real time to calculate the amount of water sucked out, which is converted into titration water volume according to the diameter of the rain sensor. The constant flow injection speed is achieved by controlling the pumping speed of the perfusion pump, thereby automatically evaluating the rain sensor titration error according to relevant requirements.

[0036] As attached Figure 1As shown, the display control unit includes an LCD display control unit, a sensor metering pulse signal acquisition interface 8 and a data export interface 9, the LCD display control unit includes a single-chip microcomputer, a memory, an LCD display screen 10 and a thermal printer 6, the LCD display screen 10 is integrated on the instrument box cover 2, and an operating status indicator light 11 and an operating status prompt sound 12 are provided below the LCD display screen 10, the sensor metering pulse signal acquisition interface 8, the data export interface 9 and the thermal printer 6 are placed on the instrument box 1; the single-chip microcomputer is used to control the pumping speed of the peristaltic pump, the metering of the water output of the high-precision intelligent lifting electronic scale weighing and metering unit, and the storage of various parameters and test data; the LCD display screen 10 controls the instrument's parameter setting, calibration, verification, operation, titration, error assessment, on-site printing of test numbers and other operations through touch, and displays various types of data. The single-chip microcomputer and the memory are prior art and will not be repeated.

[0037] The equipment is composed of a single chip microcomputer and a memory to complete the pumping speed of the peristaltic pump, the measurement control of the water sucked out by the electronic scale, and the storage of various parameters and test data. The LCD display screen 10 controls the instrument's parameter setting, calibration, verification, operation, titration, error evaluation and other operations, and displays various data and prints test data on site.

[0038] As attached Figures 2 to 4 As shown, the high-precision intelligent lifting electronic scale weighing and metering unit includes a lift bracket 21, an intelligent lifting system 18, a lifting tray 20, an electronic scale pan 17 and an electronic scale 19. The lift bracket 21 is placed in the instrument case 1, and the intelligent lifting system 18 is placed on the lift bracket 21. The intelligent lifting system 18 is used to switch the electronic scale 19 between weighing and weightlessness states.

[0039] The intelligent lifting system 18 includes a spiral screw 23, a nut 24, a motor 25 and a mounting base 22. The intelligent lifting system 18 is installed on the lifting bracket 21 through the mounting base 22. The motor 25 drives the spiral screw 23 to rotate and causes the nut 24 mounted on the spiral screw 23 to be lifted and lowered. The nut 23 is connected to the lifting tray 20. When the lifting tray 20 lifts the electronic scale pan 17 and the water tank 16, the electronic scale 19 is in a weighing state. At this time, the water tank 16 rises from the water tank slot 15 and breaks away from the contact with the instrument case 1. When the electronic scale pan 17 is lowered to separate it from the water tank 16, the electronic scale 19 is in a weightless state. In the weightless state, the edge of the water tank 16 is placed on the edge of the water tank slot 15 of the instrument case 1 and does not contact the electronic scale pan 17.

[0040] This product adds a high-precision electronic scale real-time measurement and calibration method based on the existing pump tube measurement and calibration method. In order to avoid measurement drift caused by long-term load-bearing of the electronic scale, an intelligent lifting system for the electronic scale is specially developed, so that the electronic scale automatically enters the weighing state when calibration and titration are required, and it will automatically enter the weightless state after completing the calibration and titration detection. This product has a high degree of intelligence. When the pre-stored water volume is insufficient during calibration, an automatic sound prompt will be given and the calibration will be suspended. After water is replenished, the unfinished calibration can be continued, avoiding unnecessary repeated calibration work. When the titrator is displaced during the titration process and the inclination angle of the equipment changes, the current calibration will be automatically terminated and accompanied by an audio alarm prompt. At this time, it is necessary to re-enter the new calibration process.

[0041] As attached Figure 1 As shown, the power supply unit includes a built-in lithium battery, a charging adapter, a power switch 13 and a power charging interface 14. The power switch 13 and the power charging interface 14 are both arranged on the instrument box 1. The built-in lithium battery provides power to the device, and the charging adapter charges the built-in lithium battery. The built-in lithium battery and the charging adapter are not shown in the drawings.

[0042] As attached Figure 1 As shown, the instrument case 1 is provided with a sensor metering pulse signal acquisition interface 8 and a data export interface 9. The sensor metering pulse signal acquisition interface 8 is connected to the device to be tested and collects the metering pulse signal of its rainfall sensor; the data export interface 9 is used to export test data; the thermal printer 6 is used to print on-site titration test data, which is used as a basis for targeted adjustment of on-site sensors.

[0043] After calibration, the titration process data will be saved and the titration results of the rain sensor at this station will be automatically sent to the preset central platform through the 4G channel. The rain sensor titration test process data can also be printed on site. The titration process data of the rain sensor at each station can be downloaded to the computer through the RS-232 interface for data compilation and work filing.

[0044] As attached Figure 1 As shown, the instrument case is provided with a weight hole for placing a weight 3, a measuring cup hole for placing a measuring cup 4, and a level ruler 5 for monitoring the horizontality of the instrument case.

[0045] How to use this application product: When entering the rainfall sensor calibration site,

[0046] 1. Posture adjustment: Place the product in a basically horizontal state, connect the water inlet and outlet pipes and the sensor signal line, prepare sufficient clean water (tap water or purified water), and then power on the device. Adjust the device placement state according to the X\Y value of the device inclination, that is, when X=180\Y=0, it is horizontal. When adjusting, the two numbers can be basically close to make the device in a horizontal state.

[0047] 2. Measurement and calibration: When using the sensor for the first time or when the type of calibration sensor changes, its parameters should be set according to the specific conditions of the calibration site. After the parameter setting is completed, enter the equipment verification (calibration) page. If the rainfall sensor is calibrated by weighing measurement, the electronic scale is first peeled and zeroed. At this time, the electronic scale will automatically lift the empty water tank away from the titrator panel to ensure that the empty water tank has no contact with the panel, so that the electronic scale is in a weighing state. The control unit will automatically tare and reset the electronic scale to zero. When the data in the "Water Storage Weight" column on the display screen shows a range of 0.00 to 0.05g, the tare is successful. Otherwise, perform the tare operation again. After the tare operation is completed, the weights can be placed in the empty water tank. If the data displayed in the "Water Storage Weight" column is inconsistent with the mass of the placed weights, click the blank space in the "Weight Mass" column, enter the total mass of the weights on the scale and confirm, read the "Water Storage Weight" again, if it is consistent with the total mass of the weights, you can take out the weights, fill the water tank with water to be titrated, and place the water inlet end of the peristaltic pump inlet pipe into the bottom of the water tank, and then click "Exhaust" to wait for the water to enter and exit. When there is no air in the water pipe, click the "Pause" button, hang the water outlet pipe hook on the mouth of the special measuring cup and click the "Start" button. At this time, the equipment will perform water injection verification at the preset titration speed. When the water injection measurement reaches 10mm, the equipment will automatically stop injecting water and sound a prompt. Under normal circumstances, the amount of water in the measuring cup and the amount of water injection displayed on the screen are both 10mm. If they are inconsistent, check whether the inclination angle of the equipment is too large, re-level the equipment and perform peeling and weight calibration again (if multiple calibrations are unsuccessful, it is estimated that the electronic scale is faulty. At this time, select the titration method as pump tube metering in the parameter setting, and use the pump tube metering method for titration test).

[0048] 3. Titration test: After calibration, pour the water in the measuring cup into the water tank, and then go to the titration test page to enter the rain gauge titration test process. During the titration process, the equipment will record and display the absolute error and cumulative relative error of each pulse measurement in real time until the titration is completed. If the titration results are required, press the "Print" button to print the titration process data. If printing is not required, press the "Save" button to save all the titration data of the titration station. If a 4G communication card is pre-inserted in the DTU, the titration results will be automatically sent to the pre-set central platform. After an inspection process is completed, all titration data can be downloaded to the computer for record keeping through the RS-232 interface and the serial port assistant to send a special command.

Claims

1. An intelligent weighing rain titration tester, comprising an instrument box, wherein the instrument box is composed of an instrument box body and an instrument box cover, and is characterized in that: The instrument box is provided with: A water injection unit, used for providing a constant flow of measuring water to the rainfall sensor; High-precision intelligent lifting electronic scale weighing and metering unit, used to collect the remaining water weight in the water storage tank in real time and calculate the amount of constant flow measurement water sucked out by the water injection unit; Display control unit, used to control instrument parameter setting, calibration, verification, operation, titration, error evaluation, on-site titration data printing operations and display various data; Power supply unit, provides power to the instrument.

2. The intelligent weighing rain titration tester according to claim 1 is characterized in that: The water injection unit includes an injection pump, a peristaltic tube, an inlet silicone water pipe, an outlet silicone water pipe and a water storage tank. The injection pump is installed in the instrument case, and the peristaltic tube is installed on the injection pump and is used to transport water for measurement; the two ends of the peristaltic tube are respectively connected to the inlet silicone water pipe and the outlet silicone water pipe, and the water inlet end of the inlet silicone water pipe is placed in the water storage tank, and the water storage tank is used to store water for measurement; the outlet end of the outlet silicone water pipe is hung on the rain receiving port of the rainfall sensor to be measured through a hook, and water is injected into the rainfall sensor at a constant flow rate at a set speed.

3. The intelligent weighing rain titration tester according to claim 1 is characterized in that: The display control unit includes an LCD display control unit, a sensor metering pulse signal acquisition interface and a data export interface. The LCD display control unit includes a single-chip microcomputer, a memory, an LCD display screen, and a thermal printer. The LCD display screen is integrated on the instrument box cover. The single-chip microcomputer is used to control the pumping speed of the peristaltic pump, the metering of the water output of the high-precision intelligent lifting electronic scale weighing and metering unit, and the storage of various parameters and test data; the LCD display screen controls the instrument's parameter setting, calibration, verification, operation, titration, error assessment, titration data printing operations and the display of various data through touch.

4. An intelligent weighing rain titration tester according to any one of claims 1 to 3, characterized in that: The high-precision intelligent lifting electronic scale weighing and metering unit includes a lift bracket, an intelligent lifting system, a lifting tray, an electronic scale pan and an electronic scale. The lift bracket is placed in an instrument case. The electronic scale pan is used to place a water tank. The upper part of the water tank is provided with a box edge that can be placed on the instrument case. The intelligent lifting system is placed on the lift bracket. The intelligent lifting system is used to switch the electronic scale between weighing and weightless states.

5. The intelligent weighing rain titration tester according to claim 4 is characterized by: The intelligent lifting system includes a spiral screw, a nut, a motor and a mounting base. The intelligent lifting system is installed on the lifting bracket through the mounting base. The motor drives the spiral screw to rotate and causes the nut mounted on the spiral screw to be rotated to achieve lifting. The nut is connected to the lifting tray. When the lifting tray lifts the electronic scale pan and the water tank, the electronic scale is in a weighing state. When the lifting tray puts down the electronic scale pan to separate it from the water tank, the electronic scale is in a weightless state. In the weightless state, the edge of the water tank is placed on the instrument box and is out of contact with the electronic scale pan.

6. The intelligent weighing rain titration tester according to claim 1 is characterized by: The power supply unit includes a built-in lithium battery and a charging adapter, the built-in lithium battery provides power to the device, and the charging adapter charges the built-in lithium battery.

7. The intelligent weighing rain titration tester according to claim 3 is characterized by: The sensor metering pulse signal acquisition interface, data export interface and thermal printer are placed on the instrument box; the sensor metering pulse signal acquisition interface is connected to the device to be tested and collects the metering pulse signal of its rainfall sensor; the data export interface is used to export test data; and the thermal printer is used for on-site printing of test data.

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