Air tap type pressure sensor and application structure and application method thereof

Abstract

The invention discloses an air tap type pressure sensor and an application structure and an application method thereof, and belongs to the technical field of intelligent irrigation in intelligent agriculture. The air tap type pressure sensor comprises a pressure detection part, an electric connector and a flow guide assembly, the electric connector is connected with one end of the pressure detection part and electrically connected with the pressure detection part, and the flow guide assembly is connected with the end, away from the electric connector, of the pressure detection part. A peasant obtains water pressure information from the cloud server through a PC terminal or a mobile phone terminal, the worries of the peasant on the conditions of uneven water pressure, valve opening and closing faults, pipe burst abnormity of a pipe network and the like after the irrigation terminal is started are effectively eliminated, the peasant can master the water pressure condition of the irrigation terminal without going down to the ground, then remote regulation and control or maintenance are conducted, and the work efficiency is improved. Uniform irrigation and efficient field management are achieved, time and labor are saved, and development of the irrigation technology is promoted.

Description

Technical Field

[0001] The invention relates to a nozzle type pressure sensor and an application structure and an application method thereof, belonging to the technical field of smart agriculture intelligent irrigation. Background Art

[0002] The development and application of water-saving irrigation technology is crucial to improving the efficiency of water resource utilization, increasing farmland output, and reducing water resource waste. Significant progress has been made in my country, and it is developing in the direction of intelligence, precision, and efficiency. The functional requirements for irrigation terminals have also been further increased. At present, although most irrigation terminals can remotely open and close irrigation terminals according to the rotation irrigation plan, uneven water pressure at the end of field irrigation, valve opening and closing failures, pipe bursts, etc. occasionally lead to uneven crop growth and crop yield reduction, which has always been the pain point and difficulty of efficient water-saving irrigation. To solve this problem, the usual method is to go to the field after the irrigation starts to check whether the water pressure is balanced, whether the valve is faulty, and whether the pipe network is normal. Obviously, this method is time-consuming and labor-intensive, inefficient, and has high management intensity. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a nozzle type pressure sensor and its application structure and application method.

[0004] The present invention is achieved through the following technical solutions:

[0005] A valve-type pressure sensor comprises a pressure detection component, an electrical connector and a flow guide assembly, wherein the electrical connector is connected to one end of the pressure detection component and is electrically connected to the pressure detection component, and the flow guide assembly is connected to an end of the pressure detection component away from the electrical connector.

[0006] The pressure detection component comprises a housing and a pressure sensing assembly arranged in the housing.

[0007] The pressure sensor assembly includes a PCB circuit board and a pressure sensor chip. The PCB circuit board and the pressure sensor chip are both fixed in the housing, and the pressure sensor chip is electrically connected to the PCB circuit board.

[0008] The electrical connector comprises a female aviation plug and a male aviation plug, and the male aviation plug is detachably connected to the female aviation plug.

[0009] The aviation plug female head includes a base and a locking nut. One end of the base is fixed in the shell. A plurality of crown spring female pins are arranged on the base. One end of the crown spring female pins is electrically connected to the PCB circuit board. The locking nut is movably sleeved on the base.

[0010] The aviation plug male head includes a screw sleeve, a hexagonal head is provided in the middle of the outer circle of the screw sleeve, and O-rings are mounted on both sides of the hexagonal head on the screw sleeve, and a plurality of crown spring male pins are fixedly provided on the inner side of the screw sleeve.

[0011] The guide assembly includes an air nozzle and an air pipe. One end of the air nozzle is fixed in the shell and is sleeved on the pressure boss of the pressure sensor chip. The other end of the air nozzle extends outside the shell and is provided with barbs on the outer circle of the end. One end of the air pipe is sleeved on the barb of the air nozzle, and the other end is connected to the air pipe quick connector.

[0012] An application structure of an air nozzle type pressure sensor includes an irrigation terminal valve and a control box, wherein the control box is connected to the water outlet pipe wall of the irrigation terminal valve through the air nozzle type pressure sensor, and a controller is arranged in the control box, and the controller is electrically connected to the air nozzle type pressure sensor.

[0013] The control box is provided with a wireless transceiver module, and the wireless transceiver module is electrically connected to the controller;

[0014] The male aviation plug in the air nozzle type pressure sensor is threadedly connected to the threaded hole on the side wall of the control box, or the male aviation plug is locked and fixed on the side wall of the control box with a nut, and the male aviation plug is electrically connected to the controller.

[0015] An application method of an application structure of a gas nozzle type pressure sensor comprises the following steps:

[0016] Step 1: After the irrigation terminal valve is opened, water enters the air pipe and compresses the air in the air pipe, thereby transmitting the water pressure information to the pressure sensor chip;

[0017] Step 2: The pressure sensor chip converts the analog signal of the water pressure information into a digital signal and transmits it to the controller through the PCB circuit board and the electrical connector;

[0018] Step 3: The controller adjusts the valve opening of the irrigation terminal valve in real time according to the received water pressure information to adjust the water pressure at its outlet, thereby achieving balanced irrigation water pressure control;

[0019] Step 4: The controller uploads the received water pressure information to the cloud server through the wireless transceiver module, and the cloud server pushes the water pressure information to the PC or mobile phone in real time.

[0020] The beneficial effects of the present invention are:

[0021] 1. The electrical connector, force detection component and guide component are integrated together, and the male aviation plug in the electrical connector is directly sealed and connected to the control box. On the one hand, there is no need to design a waterproof connector to introduce the cable into the control box. On the other hand, the distance between the air nozzle pressure sensor and the controller is significantly shortened, achieving the purpose of greatly shortening the length of the cable between the air nozzle pressure sensor and the controller, which not only improves the installation convenience of the air nozzle pressure sensor connected to the irrigation terminal, but also reduces the installation cost of the air nozzle pressure sensor.

[0022] 2. After the irrigation terminal valve is opened, the irrigation water at its outlet enters the trachea through the trachea quick connector. The irrigation water flows from bottom to top in the trachea, compressing the air in the trachea. Finally, the water pressure information is transmitted to the air nozzle and the pressure sensor chip through the compressed air gathered at the upper end of the trachea. Since the irrigation water in the trachea does not contact the air nozzle and the pressure sensor chip, the lower port of the air nozzle (i.e., the collection hole) can be avoided from being blocked, and the pressure sensor chip can avoid malfunctions such as distortion of the collected data.

[0023] 3. Farmers can obtain water pressure information from the cloud server through PC or mobile phone, which effectively eliminates their concerns about uneven water pressure, valve opening and closing failures, and pipe bursts after the irrigation terminal is turned on. Farmers can understand the water pressure at the end of the irrigation without going to the field, and then conduct remote control or maintenance to achieve uniform irrigation and efficient management of the field, saving time and effort, and contributing to the development of irrigation technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 An exploded view of the air nozzle type pressure sensor of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the air nozzle type pressure sensor of the present invention after the aviation plug male head is removed;

[0026] Figure 3 for Figure 2 Section view along AA;

[0027] Figure 4 It is an assembly diagram of the aviation plug female head, the pressure detection component and the air nozzle of the present invention;

[0028] Figure 5 for Figure 4 Sectional view along BB;

[0029] Figure 6 It is a structural schematic diagram of the application structure of the air nozzle type pressure sensor of the present invention;

[0030] Figure 7 It is an assembly diagram of the aviation plug male head and the control box of the present invention.

[0031] In the figure: 1-electric connector, 10-male aviation plug, 100-O-ring, 101-male crown spring pin, 102-screw sleeve, 11-female aviation plug, 110-base, 111-female crown spring pin, 112-locking nut, 2-pressure detection component, 20-pressure sensor component, 21-housing, 3-flow guide component, 30-air nozzle, 31-air pipe, 32-air pipe quick connector, 4-control box, 5-wireless transceiver module, 6-irrigation terminal valve, 200-PCB circuit board, 201-pressure sensor chip, 202-pressure boss. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0033] like Figures 1 to 7 As shown, the air nozzle type pressure sensor of the present invention comprises a pressure detection component 2, an electrical connector 1 and a flow guide component 3, wherein the electrical connector 1 is connected to one end of the pressure detection component 2 and is electrically connected to the pressure detection component 2, and the flow guide component 3 is connected to an end of the pressure detection component 2 away from the electrical connector 1. When in use, the water at the water outlet of the irrigation terminal valve 6 is guided to the pressure detection component 2 through the flow guide component 3, the water pressure is detected by the pressure detection component 2, and the water pressure information detected by the pressure detection component 2 is transmitted through the electrical connector 1.

[0034] The pressure detection component 2 includes a housing 21 and a pressure sensing assembly 20 disposed in the housing 21 .

[0035] The pressure sensor assembly 20 includes a PCB circuit board 200 and a pressure sensor chip 201. The PCB circuit board 200 and the pressure sensor chip 201 are both fixedly arranged in the housing 21, and the pressure sensor chip 201 is electrically connected to the PCB circuit board 200. When in use, the model of the pressure sensor chip 201 is SOP8.

[0036] The electrical connector 1 comprises an aviation plug female head 11 and an aviation plug male head 10 , and the aviation plug male head 10 is detachably connected to the aviation plug female head 11 .

[0037] The female aviation plug 11 includes a base 110 and a locking nut 112. One end of the base 110 is fixed in the housing 21. Three or four crown spring female pins 111 are arranged on the base 110. One end of the crown spring female pin 111 is electrically connected to the PCB circuit board 200. The locking nut 112 is movably mounted on the base 110. When in use, the lower end of the crown spring female pin 111 is directly welded to the corresponding solder joint of the PCB circuit board 200. The PCB circuit board 200 serves as a bridge for transition connection between the crown spring female pin 111 and the pressure sensor chip 201. The locking nut 112 is used to be threadedly connected with the screw sleeve 102 of the male aviation plug 10 to ensure that the crown spring male pin 101 and the crown spring female pin 111 remain in the plugged state after being plugged in, so as to achieve reliable electrical connection.

[0038] The aviation plug male head 10 includes a screw sleeve 102, a hexagonal head is provided in the middle of the outer circle of the screw sleeve 102, and O-rings 100 are mounted on both sides of the hexagonal head on the screw sleeve 102, and three or four crown spring male pins 101 are fixedly provided on the inner side of the screw sleeve 102. When in use, the number of crown spring male pins 101 on the inner side of the screw sleeve 102 is consistent with the number of crown spring female pins 111 on the base 110, and the crown spring male pins 101 can be plugged with the crown spring female pins 111 to achieve electrical connection. One of the O-rings 100 is used to seal the connection between the aviation plug male head 10 and the aviation plug female head 11, and the other O-ring 100 is used to seal the connection between the aviation plug male head 10 and the control box 4.

[0039] The flow guide assembly 3 includes an air nozzle 30 and an air pipe 31. One end of the air nozzle 30 is fixed in the housing 21 and is mounted on the pressure boss 202 of the pressure sensor chip 201. The other end of the air nozzle 30 extends outside the housing 21, and a barb is provided on the outer circle of the end. One end of the air pipe 31 is mounted on the barb of the air nozzle 30, and the other end is connected to the air pipe quick connector 32. When in use, the end of the air pipe 31 away from the air nozzle 30 is inserted and fixed on the air pipe quick connector 32. When the air pipe 31 needs to be replaced, it is only necessary to press the circular release cap of the air pipe quick connector 32 to release the retaining spring, and then take out the end of the air pipe 31. The air pipe quick connector 32 is a commonly used standard part and will not be described here. When the upper end of the air pipe 31 is mounted on the barb of the air nozzle 30, it will be slightly deformed to ensure the sealing of the connection between the air pipe 31 and the air nozzle 30.

[0040] Specifically, the locking nut 112 and the base 110 with the crown spring female pin 111 installed are first produced by the injection molding process, and then the locking nut 112 is movably mounted on the base 110, and then the PCB circuit board 200 is welded to the pressure sensor chip 201 and the crown spring female pin 111 of the female aviation plug 11, and then one end of the air nozzle 30 is mounted on the pressure boss 202 of the pressure sensor chip 201, and finally all the above-assembled accessories are put into the mold of the housing 21 as an insert for secondary injection molding to obtain the following. Figure 4 and Figure 5 The integral structure shown.

[0041] An application structure of an air nozzle type pressure sensor includes an irrigation terminal valve 6 and a control box 4. The control box 4 is connected to the water outlet pipe wall of the irrigation terminal valve 6 through the air nozzle type pressure sensor. A controller is provided in the control box 4, and the controller is electrically connected to the air nozzle type pressure sensor. When in use, the air pipe quick connector 32 in the air nozzle type pressure sensor is threadedly connected to the water outlet pipe wall of the irrigation terminal valve 6 and communicated with the interior of the irrigation terminal valve 6. Figure 6 As shown, in the irrigation system, the irrigation terminal valve 6 is usually installed at the outlet of the irrigation pipe network. Water flows from bottom to top, entering from one water inlet and exiting from multiple water outlets. The controller has the function of controlling the opening of the water outlet of the irrigation terminal valve 6.

[0042] The control box 4 is provided with a wireless transceiver module 5, and the wireless transceiver module 5 is electrically connected to the controller;

[0043] The male aviation plug 10 in the air nozzle pressure sensor is threadedly connected to the threaded hole on the side wall of the control box 4, or the male aviation plug 10 is locked and fixed on the side wall of the control box 4 by a nut, and the male aviation plug 10 is electrically connected to the controller. The existing pressure sensor often uses a long cable to be electrically connected to the controller, and a special waterproof connector needs to be designed to introduce the cable into the control box 4, which makes the pressure sensor inconvenient to install and the installation cost is too high. The present invention integrates the electrical connector 1, the force detection component 2 and the guide component 3 together, and directly seals the male aviation plug 10 in the electrical connector 1 with the control box 4. On the one hand, there is no need to design a waterproof connector to introduce the cable into the control box 4. On the other hand, the distance between the air nozzle pressure sensor and the controller is significantly shortened, achieving the purpose of greatly shortening the length of the cable between the air nozzle pressure sensor and the controller, which not only improves the installation convenience of the air nozzle pressure sensor connected to the irrigation terminal, but also reduces the installation cost of the air nozzle pressure sensor.

[0044] An application method of an application structure of a gas nozzle type pressure sensor comprises the following steps:

[0045] Step 1: After the irrigation terminal valve 6 is opened, water enters the air pipe 31 and compresses the air in the air pipe 31, thereby transmitting the water pressure information to the pressure sensor chip 201. When detecting water pressure, the existing pressure sensor generally directly contacts the pressure sensor chip 201 with the measured medium. In the agricultural irrigation application scenario, the direct contact between the pressure sensor chip 201 and the irrigation water can easily lead to blockage of the collection hole, and then cause the pressure sensor to collect data distortion and other faults. Figure 6 As shown, after the irrigation terminal valve 6 is opened, the irrigation water at its outlet enters the air pipe 31 through the air pipe quick connector 32, and the irrigation water flows from bottom to top in the air pipe 31, compressing the air in the air pipe 31, and finally transmitting the water pressure information to the air nozzle 30 and the pressure sensor chip 201 through the compressed air gathered at the upper end of the air pipe 31. Since the irrigation water in the air pipe 31 does not contact the air nozzle 30 and the pressure sensor chip 201, the lower port (i.e., the collection hole) of the air nozzle 30 can be prevented from being blocked, and the pressure sensor chip 201 can be prevented from having malfunctions such as distortion of the collected data.

[0046] Step 2: The pressure sensor chip 201 converts the analog signal of the water pressure information into a digital signal, and transmits it to the controller through the PCB circuit board 200 and the electrical connector 1.

[0047] Step 3: The controller controls the valve opening of the irrigation terminal valve 6 in real time according to the received water pressure information to adjust the water pressure at its outlet, thereby achieving balanced control of the irrigation water pressure. When the water pressure at a certain outlet is too high, the controller controls the irrigation terminal valve 6 to reduce the valve opening at the outlet; when the water pressure at a certain outlet is too low, the controller controls the irrigation terminal valve 6 to increase the valve opening at the outlet, thereby achieving balanced control of the irrigation water pressure.

[0048] Step 4: The controller uploads the received water pressure information to the cloud server through the wireless transceiver module 5, and the cloud server pushes the water pressure information to the PC or mobile phone in real time. Farmers obtain water pressure information from the cloud server through the PC or mobile phone, which effectively eliminates their concerns about uneven water pressure, valve opening and closing failures, and pipe network bursts after the irrigation terminal is turned on. Farmers can grasp the water pressure at the end of the irrigation without going to the field, and then conduct remote control or maintenance to achieve uniform irrigation and efficient management of the field, saving time and effort, and helping the development of irrigation technology. Because when abnormal conditions such as valve opening and closing failures and pipe network bursts occur, the pressure at the outlet of the irrigation terminal valve 6 will be significantly different from the normal pressure. Therefore, through the application structure and application method of the above-mentioned air nozzle pressure sensor, it is possible to grasp whether abnormal conditions such as valve opening and closing failures and pipe network bursts occur.

Claims

1. A nozzle type pressure sensor, characterized in that: The invention comprises a pressure detection component (2), an electrical connector (1) and a flow guide component (3), wherein the electrical connector (1) is connected to one end of the pressure detection component (2) and is electrically connected to the pressure detection component (2), and the flow guide component (3) is connected to an end of the pressure detection component (2) away from the electrical connector (1).

2. The valve-type pressure sensor according to claim 1, characterized in that: The pressure detection component (2) comprises a housing (21) and a pressure sensing assembly (20) arranged in the housing (21).

3. The valve-type pressure sensor according to claim 2, characterized in that: The pressure sensor assembly (20) comprises a PCB circuit board (200) and a pressure sensor chip (201); the PCB circuit board (200) and the pressure sensor chip (201) are both fixedly arranged in a housing (21), and the pressure sensor chip (201) is electrically connected to the PCB circuit board (200).

4. The valve-type pressure sensor according to claim 3, characterized in that: The electrical connector (1) comprises an aviation plug female head (11) and an aviation plug male head (10), and the aviation plug male head (10) and the aviation plug female head (11) are detachably connected.

5. The valve-type pressure sensor according to claim 4, characterized in that: The aviation plug female head (11) comprises a base (110) and a locking nut (112); one end of the base (110) is fixedly arranged in the housing (21); a plurality of crown spring female pins (111) are arranged on the base (110); one end of the crown spring female pins (111) is electrically connected to the PCB circuit board (200); and the locking nut (112) is movably sleeved on the base (110).

6. The valve-type pressure sensor according to claim 4, characterized in that: The aviation plug male head (10) comprises a screw sleeve (102), a hexagonal head is provided in the middle of the outer circle of the screw sleeve (102), and O-type sealing rings (100) are mounted on both sides of the hexagonal head on the screw sleeve (102), and a plurality of crown spring male pins (101) are fixedly provided on the inner side of the screw sleeve (102).

7. The valve-type pressure sensor according to claim 3, characterized in that: The flow guide assembly (3) comprises an air nozzle (30) and an air pipe (31); one end of the air nozzle (30) is fixedly arranged in the housing (21) and is sleeved on the pressure boss (202) of the pressure sensor chip (201); the other end of the air nozzle (30) extends outside the housing (21), and a barb is provided on the outer circle of the end; one end of the air pipe (31) is sleeved on the barb of the air nozzle (30), and the other end is connected to the air pipe quick connector (32).

8. An application structure of the air nozzle type pressure sensor according to any one of claims 1 to 7, characterized in that: It comprises an irrigation terminal valve (6) and a control box (4), wherein the control box (4) is connected to the water outlet pipe wall of the irrigation terminal valve (6) via an air nozzle type pressure sensor, and a controller is arranged in the control box (4), and the controller is electrically connected to the air nozzle type pressure sensor.

9. The application structure of the air nozzle type pressure sensor according to claim 8, characterized in that: The control box (4) is provided with a wireless transceiver module (5), and the wireless transceiver module (5) is electrically connected to the controller; The male aviation plug (10) in the air nozzle type pressure sensor is threadedly connected to the threaded hole on the side wall of the control box (4), or the male aviation plug (10) is locked and fixed to the side wall of the control box (4) using a nut, and the male aviation plug (10) is electrically connected to the controller.

10. An application method of the application structure of the air nozzle type pressure sensor according to claim 9, characterized in that: The following steps are involved: Step 1: After the irrigation terminal valve (6) is opened, water enters the air pipe (31) and compresses the air in the air pipe (31), thereby transmitting water pressure information to the pressure sensor chip (201); Step 2: The pressure sensor chip (201) converts the analog signal of the water pressure information into a digital signal, and transmits the digital signal to the controller through the PCB circuit board (200) and the electrical connector (1); Step 3: The controller controls the valve opening of the irrigation terminal valve (6) in real time according to the received water pressure information to adjust the water pressure at its outlet, thereby achieving balanced irrigation water pressure control; Step 4: The controller uploads the received water pressure information to the cloud server via the wireless transceiver module (5), and the cloud server pushes the water pressure information to the PC or mobile phone in real time.

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