CN106919191B - Water leakage drip metering control device of lysimeter - Google Patents

Abstract

The invention discloses a water leakage drip metering control device of a lysimeter, which comprises a waterproof box, a drip, an infrared ray correlation device and a metering control system; the drip device is positioned in a U-shaped groove at the left end of the waterproof box, an infrared ray correlation device is arranged on the drip device, the infrared ray correlation device is fixed on a U-shaped groove card of the waterproof box through a U-shaped clamping ring, and the metering control system is arranged in a waterproof shell at the right end of the waterproof box; the metering control system is electrically connected with the infrared opposite-shooting device and receives the metering water drop pulse signals, and the metering control system is electrically connected with an electromagnetic clamp arranged on the dropper and used for controlling the flow rate of metering water of the dropper. The invention ensures accurate metering and stable discharge of the percolating water of the steamer, and has high metering accuracy, timeliness and stability. Meanwhile, the working condition can be monitored, the working parameters can be set and modified, the monitoring data can be stored and displayed, abnormal conditions can be monitored, and the alarm can be given in time, so that the automatic monitoring of the percolating water of the percolating steamer can be realized, and the automation degree of equipment is high.

Description

A kind of lysimeter leakage water drip metering control device

Technical field

The invention belongs to the technical field of lysimeters and relates to a drip metering control device for leakage water from a lysimeter.

Background technique

At present, when measuring leakage water in lysimeters at home and abroad, manual methods are often used to divert the leakage water into a receiving container for weighing. Some lysimeters with a higher degree of automation are equipped with a tipping bucket rain gauge for measurement. Although the equipment It is simple, low-cost, and the measurement method is simple. However, it is limited by the conditions of the lysimeter itself. For example, the constant-level groundwater lysimeter will only produce deep infiltration to form leakage water during heavy rainfall, or when the soil thaws in spring. Leakage water is generated. The amount of water leakage from the lysimeter is very small and has strong timeliness. It is necessary to accurately measure trace amounts of leakage water at different time points. Although the tipping bucket rain gauge can accurately measure and realize automated observation, it cannot It is also impossible to measure trace amounts of water and its timeliness, nor to measure flow rate.

Contents of the invention

In order to solve the above-mentioned problems existing in the existing technology and actual situations, the present invention provides a drip metering control device for lysimeter leakage water, which includes a waterproof box, a dripper, an infrared emitter and a metering control system; the drip metering control device The device is located in the U-shaped groove at the left end of the waterproof box. The drip device is equipped with an infrared emitter. The metering control system is installed in the waterproof housing at the right end of the waterproof box. The metering control system is electrically connected to the infrared emitter to accept measurement. Water droplet pulse signal, the metering control system is electrically connected to the electromagnetic clip provided on the dripper, and is used to control the flow rate of water measured by the dripper.

Preferably, the waterproof box includes a waterproof panel and a waterproof casing. The left end of the waterproof casing has a U-shaped groove for installing the drip device, which is secured by upper and lower fixing cards provided in the U-shaped groove. Fixed, the waterproof panel on the front of the waterproof box is fixed on the waterproof shell, and there are holes for input and output equipment of the metering control system on the waterproof panel.

Preferably, the dripper includes a water inlet pipe, a drip kettle, a dripper, a drainage pipe and an electromagnetic clamp; the water inlet pipe extends into the drip kettle from above, and the dripper is located at the lower end of the water inlet pipe to measure moisture. Entering the water inlet pipe, water droplets form through the dripper, collect in the water at the bottom of the drip pot, and are discharged through the drain pipe, which is equipped with an electromagnetic clamp.

Preferably, the infrared emitter is composed of a U-shaped snap ring, an infrared transmitting tube, an infrared receiving tube and a drip pulse circuit; the U-shaped snap ring is located on the drip pot of the drip device, surrounding the outside of the drip pot, and is at a height above the drip device Between the dripper and the water surface, it is fixed on the U-shaped groove of the waterproof box. The U-shaped snap ring is equipped with an infrared transmitting tube and an infrared receiving tube on the opposite sides of the drip pot. The drip pulse circuit is installed on the U-shaped card. It is inside the waterproof shell on the back of the ring and is electrically connected to the infrared transmitting tube and the infrared receiving tube.

Preferably, the measurement control system consists of a microprocessor, a real-time clock, a buzzer, a working indicator light, a display, a keyboard, a data communication port and a battery box; the microprocessor is electrically connected to the drip pulse circuit of the infrared emitter. , used to receive the drip pulse signal, and is electrically connected to the electromagnetic clip on the drip pipe of the drip pipe, used to control the drip meter to measure the water flow rate; the output end of the microprocessor is connected to a work indicator light, a display, and a buzzer; the microprocessor The input end is connected with a real-time clock and a keyboard. The real-time clock provides time information to the system. Through keyboard input, system parameters can be set, modified, and instructions issued. The microprocessor has a data communication port for data communication with the outside world. The battery box passes 1.5V The dry battery directly supplies power to the infrared emitter and microprocessor respectively, and indirectly supplies power to the real-time clock, buzzer, work indicator light, display, keyboard and electromagnetic clip through the microprocessor.

The leakage water drop metering and control device of the lysimeter of the present invention is equipped with a waterproof box, a dropper, an infrared ray emitter and a metering control system, which can convert the leaked water into water droplets for infrared ray counting, and automatically calculate the accumulated water volume and drip speed during a period. , and compare it with the settable parameter value, adjust and control the dripping speed in time, ensuring accurate measurement and stable discharge of leakage water from the lysimeter, and high water measurement accuracy, timeliness and stability. At the same time, it can monitor working conditions, set and modify working parameters, store and display monitoring data, monitor abnormal conditions and alarm in time, realizing automatic monitoring of leakage water from the lysimeter, and the equipment has a high degree of automation.

Description of the drawings

Figure 1 is a schematic structural diagram of a drip metering control device for leakage water in a lysimeter according to an embodiment of the present invention.

Figure 2 is a working principle diagram of the leakage water drop metering control device of the lysimeter according to the embodiment of the present invention.

Detailed ways

The technical solution of the present invention will be introduced in detail below with reference to the accompanying drawings.

As shown in Figure 1-2, this embodiment discloses a drip metering control device for lysimeter leakage water, including a waterproof box 1, a dripper 2, an infrared emitter 3 and a metering control system 4; the dripper 2 is installed In the U-shaped groove 13 on the left end of the waterproof box 1, the drip device 2 is provided with an infrared emitter 3. The infrared emitter 3 is fixed on the U-shaped groove 13 of the waterproof box 1 through a U-shaped snap ring 31. Measurement The control system 4 is installed in the waterproof housing 12 at the right end of the waterproof box 1; the metering control system 4 is electrically connected to the infrared counter 3 and receives metering water droplet pulse signals. At the same time, the metering control system 4 is connected to the electromagnetic clip 27 provided on the dripper 2. Electrical connection for controlling the flow rate of dripper 2 metered water.

The waterproof box 1 includes a waterproof panel 11 and a waterproof shell 12. The waterproof shell 12 has a U-shaped groove 13 at the left end for installing the drip device 2, and the upper fixing card 14 and the lower fixed card 14 are provided in the U-shaped groove 13. The fixing card 15 is fixed, and the waterproof panel 11 on the front of the waterproof box 1 is fixed on the waterproof housing 12 through waterproof rubber pads 16 and fixing screws 17. The waterproof panel 11 has input and output device holes for the metering control system 4.

The dripper 2 includes a water inlet pipe 21, a drip pot 22, a dripper 23, a drainage pipe 26 and an electromagnetic clamp 27; measured water enters the water inlet pipe 21, forms water droplets 24 through the dripper 23, and collects in the water liquid 25 at the bottom of the drip pot 22. Discharged through drain pipe 26. The drain pipe 26 is provided with an electromagnetic clamp 27 for controlling the metering water flow rate.

The infrared ray transmitter 3 is composed of a U-shaped snap ring 31, an infrared transmitting tube 32, an infrared receiving tube 33 and a drip pulse circuit 34; the U-shaped snap ring is set on the drip pot of the drip device, surrounding the outside of the drip pot, and the height is located on the drip pot. between the drip tip and the water surface, and is fixed on the U-shaped groove of the waterproof box. During production, the U-shaped snap ring is placed around the outside of the drip pot, and then the drip pot is installed in the groove and fixed. The U-shaped snap ring 31 is provided with an infrared transmitting tube 32 and an infrared receiving tube 33 on opposite sides of the drip pot 22 respectively. The drip pulse circuit 34 is installed in the waterproof shell 12 on the back of the U-shaped snap ring 31 and is connected with the infrared transmitter. The tube 32 and the infrared receiving tube 33 are electrically connected.

The measurement control system 4 is composed of a microprocessor 41, a real-time clock 42, a buzzer 43, a work indicator light 44, a display 45, a keyboard 46, a data communication port 47 and a battery box 48; the microprocessor 41 and the infrared emitter 3 The drip pulse circuit is electrically connected to receive the drip pulse signal, and is electrically connected to the electromagnetic clip 27 on the drain pipe 26 of the dripper 2 for controlling the metering water flow rate of the dripper 2; the output end of the microprocessor 41 is connected with a work instruction. The lamp 44, the display 45, and the buzzer 43 can display working status, data and parameter operation information, and abnormal status alarms; the input end of the microprocessor 41 is connected to a real-time clock 42 and a keyboard 46, and the real-time clock 42 provides time for the system Information can be set and modified through the input of the keyboard 46, and system parameters can be modified, instructions issued, etc.; the microprocessor 41 has a data communication port 47, which can perform data communication with the outside world; the battery box 48 supplies the infrared emitter 3 and micro The processor 41 directly supplies power, and indirectly supplies power to the real-time clock 42, buzzer 43, work indicator light 44, display 45, keyboard 46 and electromagnetic clip 27 through the microprocessor 41.

The invention provides a lysimeter leakage water measurement and control device with accurate counting, strong timeliness, strong stability and high degree of automation.

The working principle of the leakage water drop metering control device of the lysimeter of the present invention:

The leakage water of the lysimeter flows in from the water inlet pipe 21, and the liquid is converted into water droplets 24 through the dripper 23, and is collected in the water liquid 25 at the bottom of the drip pot 22; the water droplets are monitored by the infrared emitter 3 during the falling process, and the infrared rays are emitted. The infrared rays emitted by the tube 32 are blocked by falling water droplets. After being received by the infrared ray receiving tube 33, the light signal is transmitted to the pulse circuit 34 to generate a pulse signal; the pulse circuit 34 transmits the collected pulse signal to the microprocessor 41, which 41 uses the time provided by the real-time clock 42 to record the number of pulses per unit time, that is, the drip rate, compares it with the measurement parameters set by the keyboard 46 input or the data communication port 47 external device, and outputs the signal to the electromagnetic clamp 27 to control the switching value to achieve The purpose of controlling the drip speed.

The microprocessor 41 can set or modify the measurement parameters through keyboard 46 input or data communication port 47 external equipment, and at the same time, the collected and processed data and the set and modified parameters are stored and displayed through the display 45; the microprocessor 41 has Automatic monitoring function, and displays the power supply, drip metering, and drip control status through the work indicator light 44. If the working status is abnormal, the corresponding indicator light starts to flash and an alarm signal is sent through the buzzer 43. At this time, the microprocessor 41 directly outputs a shutdown command to forcefully close the electromagnetic clamp 27 to terminate drip measurement of leaking water and wait for the on-duty personnel to troubleshoot.

According to the above working principle, the amount of leaking water is equal to the number of pulses recorded by the microprocessor 41 multiplied by the volume of a drop of water. In order to overcome the error of water drop measurement, drip cumulative counting can be used to accurately measure the amount of leaking water and reduce system errors; recording per unit time The number of pulses is the dripping rate. If the recorded actual value is greater than the original set value, the microprocessor 41 will add a corresponding forward voltage to the electromagnetic clamp 27 according to the difference between the actual value and the set value, so that the electromagnetic clamp 27 The switching value becomes smaller to reduce the dripping rate. If the recorded actual value is less than the original set value, the microprocessor 41 adds a corresponding reverse voltage to the electromagnetic clamp 27, making the switching value of the electromagnetic clamp 27 larger to increase the dripping rate. This way Intelligent control of the number of drops of metered liquid.

Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still The technical solutions described in the foregoing embodiments may be modified, or some of the technical features may be equivalently replaced. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (1)

1. A drip metering control device for leakage water from a lysimeter, which is characterized in that it includes a waterproof box, a dripper, an infrared emitter and a metering control system; the dripper is located in the U-shaped groove at the left end of the waterproof box, The drip device is equipped with an infrared emitter, and the metering control system is installed in the waterproof casing at the right end of the waterproof box; the metering control system is electrically connected to the infrared emitter and receives metering water droplet pulse signals. The metering control system is connected to the drip device. The electromagnetic clip provided on the upper body is electrically connected to control the dripper to measure the flow rate of water; the waterproof box includes a waterproof panel and a waterproof shell. There is a U-shaped groove on the left end of the waterproof shell for installing the dripper, and through the U The upper fixing card and the lower fixing card provided in the groove are fixed, and the waterproof panel on the front of the waterproof box is fixed on the waterproof shell. The waterproof panel has holes for input and output equipment of the metering control system; the dripper includes an inlet Water pipe, drip kettle, dripper, drainage pipe and electromagnetic clamp; the water inlet pipe extends into the drip kettle from above, the dripper is located at the lower end of the water inlet pipe, and the lower part of the drip kettle is provided with a drainage pipe to drain water. The tube is equipped with an electromagnetic clamp; the infrared emitter is composed of a U-shaped snap ring, an infrared transmitting tube, an infrared receiving tube and a drip pulse circuit; the U-shaped snap ring is set on the drip pot of the drip device and surrounds the outside of the drip pot. The height is between the drip tip of the dripper and the water surface, and is fixed on the U-shaped groove of the waterproof box. The U-shaped snap ring is equipped with an infrared transmitter tube and an infrared receiver tube on the opposite sides of the drip pot. The drip pulse circuit is installed It is placed in the waterproof shell on the back of the U-shaped snap ring and is electrically connected to the infrared transmitting tube and the infrared receiving tube; the measurement control system consists of a microprocessor, a real-time clock, a buzzer, a working indicator light, a display, a keyboard, and data communication It consists of a port and a battery box; the microprocessor is electrically connected to the drip pulse circuit of the infrared emitter for receiving the drip pulse signal, and is also electrically connected to the electromagnetic clip on the drain pipe of the drip device for controlling the metering water flow rate of the drip device; The output end of the microprocessor is connected to a work indicator light, a display, and a buzzer; the input end of the microprocessor is connected to a real-time clock and a keyboard. The real-time clock provides time information to the system. Through keyboard input, system parameters can be set, modified, and instructions issued; The processor has a data communication port that can communicate with the outside world, and the battery box is equipped with a battery to power the device; The pulse circuit transmits the collected pulse signals to the microprocessor. The microprocessor uses the time provided by the real-time clock to record the number of pulses per unit time, that is, the drip rate, and compares it with the measurement parameters set by the keyboard input or the external device of the data communication port. And output the signal to the electromagnetic clamp to control the switching volume to achieve the purpose of controlling the drip speed; If the recorded actual value is greater than the original set value, the microprocessor will add a corresponding forward voltage to the electromagnetic clamp based on the difference between the actual value and the set value, making the electromagnetic clamp switch smaller to reduce the drip rate. If it is recorded The actual value is less than the original set value, the microprocessor adds a corresponding reverse voltage to the electromagnetic clamp, making the electromagnetic clamp switch larger to increase the drip rate.