Osmotic pressure detection sensor

Abstract

The utility model relates to the technical field of detection sensors, in particular to an osmotic pressure detection sensor, which comprises a shell main body, a connector, a filter component and a detection component, the filter component comprises a filter ring, a mounting ring, a lower shell and a sealing member, and the filter ring is made by sintering polymer copper particles, so that impurities such as suspended matters and particles can be effectively removed; the lower shell body is installed below the shell body, liquid enters the lower shell body through the through hole and is detected by the detection assembly, the core function of pressure monitoring is achieved, acceleration data of equipment can be monitored at the same time, the sealing component prevents the liquid from affecting electronic components, and the connector is used for being connected with an upper device. The high-precision sensor is used for monitoring and collecting pressure data and acceleration data, the accuracy and precision are high, meanwhile, the excellent waterproof, dustproof and pressure-resistant capabilities are achieved, and the device can normally work in the severe environment.

Description

Technical Field

[0001] The utility model relates to the technical field of detection sensors, in particular to an osmotic pressure detection sensor. Background Art

[0002] Osmotic pressure detection sensors have a wide range of applications in the fields of water conservancy, environmental monitoring, ocean engineering, etc. For example, water level monitoring, water pressure monitoring, monitoring of underground water levels, etc. Existing underground water level monitoring devices have small monitoring probes and are easily affected by water flow and debris. Most of them are installed above the ground surface, occupying ground resources.

[0003] The existing patent publication number CN210922759U discloses a detector for water conservancy project management for detecting underground water levels, including a pressure type water level gauge and an installation box. The pressure type water level gauge includes a housing. An outer shell is provided on the outer side of the housing. Through holes are provided on both the upper and lower sides of the outer shell. A diffusion membrane is provided in the through holes. An osmotic membrane is provided inside the diffusion membrane. Macromolecular particles are filled inside the osmotic membrane. After the external water penetrates into the osmotic membrane, the macromolecular particles dissolve in the water, increasing the concentration of the liquid inside the osmotic membrane. Under the action of osmotic pressure, the diffusion membrane extends out of the outer shell through the through holes, increasing the volume of the pressure type water level gauge and improving the stability of the pressure type water level gauge in water. A protective shell is installed at the lower end of the outer shell, which is convenient to use. By setting the diffusion membrane and heavy objects, the position of the pressure type water level gauge is stabilized. The installation box can save ground resources and protect the surrounding environment.

[0004] However, the housing structure of the above-mentioned pressure type water level gauge is simple. Only a protective shell is installed at the lower end of the outer shell, and the protective shell is composed of a filter screen to prevent large particles of sediment from affecting the detection results. The filtering accuracy of the filter screen is usually between 5 and 100 microns, which can filter out larger particles of impurities, but the filtering effect on tiny particles may be limited, affecting the detection accuracy. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an osmotic pressure detection sensor, which solves the problem that the filtering effect of the existing detector for water conservancy project management for detecting underground water levels is limited and affects the detection accuracy.

[0006] To achieve the above purpose, the utility model provides an osmotic pressure detection sensor, including a housing main body and a connection head. The connection head is detachably connected to the housing main body and is located at the top of the housing main body. It also includes a filtering component and a detection component;

[0007] The filtering component includes a filtering ring, a mounting ring, a lower housing, and a sealing member. The filtering ring is connected to the housing body and is located on the side of the housing body away from the connector. The mounting ring is located inside the filtering ring. The mounting ring has a plurality of through holes that penetrate the mounting ring. The lower housing is connected to the mounting ring and is located below the filtering ring. The sealing member is located inside the housing body, and the detection component is located inside the housing body.

[0008] Wherein, the sealing member includes a first isolation gasket and a second isolation gasket. The first isolation gasket is located between the housing body and the connector, and the second isolation gasket is located below the first isolation gasket.

[0009] Wherein, the sealing member further includes a waterproof ring, and the waterproof ring is located between the housing body and the detection component.

[0010] Wherein, the detection component includes a sensing unit, a main control MCU, and a communication module. The sensing unit is connected to the main control MCU, and the communication module is connected to the main control MCU.

[0011] Wherein, the sensing unit includes a ceramic osmotic pressure sensor and an AD chip. The ceramic osmotic pressure sensor is connected to the AD chip; the AD chip is connected to the main control MCU.

[0012] Wherein, the sensing unit further includes a three-axis acceleration sensor, and the three-axis acceleration sensor is connected to the main control MCU.

[0013] Wherein, the osmotic pressure detection sensor further includes a power supply, and the power supply is respectively connected to the AD chip, the three-axis acceleration sensor, the main control MCU, and the communication module.

[0014] An osmotic pressure detection sensor of the present utility model uses polymer copper particles sintered to form the filter ring. The filtration accuracy can reach 5 - 50 μm, or even finer, which can effectively remove impurities such as suspended solids and microparticles, with good purification effect. It has characteristics such as good rigidity, good plasticity, oxidation resistance, and corrosion resistance, can maintain stable performance at higher working temperatures and pressures, has a long service life, is installed below the housing main body to filter tiny particles in water, and the liquid enters the lower housing through the through hole and is detected by the detection component. It has the core function of pressure monitoring, can also simultaneously monitor the acceleration data of the device for functions such as calculating the inclination of the current device. The sealing member avoids the influence of liquid on electronic components, and the connector is used to connect to the upper device. Thus, using a high-precision sensor to monitor and collect pressure data and acceleration data has high accuracy and precision, and at the same time has excellent waterproof, dustproof, and pressure resistance capabilities, and can work normally in a harsh environment. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art.

[0016] Figure 1 It is a cross-sectional view of the osmotic pressure detection sensor according to the first embodiment of the present utility model.

[0017] Figure 2 It is a structural block diagram of the detection component according to the first embodiment of the present utility model.

[0018] Figure 3 It is a step diagram of the osmotic pressure detection method according to the second embodiment of the present utility model.

[0019] Figure 4 It is a flowchart of the osmotic pressure detection method according to the second embodiment of the present utility model.

[0020] In the figure: 101 - housing main body, 102 - connector, 103 - filter ring, 104 - mounting ring, 105 - lower housing, 106 - first isolation gasket, 107 - second isolation gasket, 108 - waterproof ring, 109 - main control MCU, 110 - communication module, 111 - ceramic osmotic pressure sensor, 112 - AD chip, 113 - three-axis acceleration sensor, 114 - power supply, 115 - through hole. Detailed Embodiments

[0021] The following will describe in detail the embodiments of the present utility model. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model and should not be construed as a limitation to the present utility model.

[0022] The first embodiment of the present application is as follows:

[0023] Please refer to Figure 1 and Figure 2 , wherein, Figure 1 is a cross-sectional view of the osmotic pressure detection sensor according to the first embodiment of the present utility model. Figure 2 is a structural block diagram of the detection component according to the first embodiment of the present utility model. The present utility model provides an osmotic pressure detection sensor, which includes a housing main body 101, a connection head 102, a filter ring 103, a mounting ring 104, a lower housing 105, a sealing member and a power supply 114. The sealing member includes a first isolation gasket 106, a second isolation gasket 107 and a waterproof ring 108. The detection component includes a sensing unit, a main control MCU 109 and a communication module 110. The sensing unit includes a ceramic osmotic pressure sensor 111, an AD chip 112 and a three-axis acceleration sensor 113.

[0024] For this specific embodiment, the connection head 102 is detachably connected to the housing main body 101 and is located at the top of the housing main body 101. The housing main body 101 functions for installation and protection, and the connection head 102 is used to connect to upper-level devices. The housing main body 101 and the connection head 102, etc. are manufactured using customized molds, ensuring the accuracy and durability of the structure.

[0025] Among them, the filter ring 103 is connected to the housing main body 101 and is located on the side of the housing main body 101 away from the connection head 102. The mounting ring 104 is located inside the filter ring 103. The mounting ring 104 has a plurality of through holes 115, and the plurality of through holes 115 penetrate through the mounting ring 104. The lower housing 105 is connected to the mounting ring 104 and is located below the filter ring 103. The sealing member is located inside the housing main body 101, and the detection component is located inside the housing main body 101.

[0026] The filter ring 103 is made of sintered polymer copper particles, and the filtration accuracy can reach 5 - 50 μm, or even finer, which can effectively remove impurities such as suspended solids and microparticles, with good purification effect. It has characteristics such as good rigidity, good plasticity, oxidation resistance, and corrosion resistance. It does not require an external skeleton for support and protection, is simple to install and use, and is convenient to maintain. It belongs to a high-temperature and high-pressure resistant filter element, can maintain stable performance at relatively high working temperatures and pressures, has a long service life, is installed below the housing main body 101, and has the installation ring 104 on the inner side. The filtered liquid enters the lower housing 105 through the through hole 115, and then is detected by the detection component. It not only has the core function of pressure monitoring, but also can simultaneously monitor the acceleration data of the device for functions such as calculating the inclination of the current device. The sealing member plays a sealing role for the detection component, with capabilities such as waterproof, dustproof, and pressure resistance.

[0027] Secondly, the first isolation gasket 106 is located between the housing main body 101 and the connector 102, and the second isolation gasket 107 is located below the first isolation gasket 106. The waterproof ring 108 is located between the housing main body 101 and the detection component.

[0028] Both the first isolation gasket 106 and the second isolation gasket 107 are made of high-density nylon, are set on the housing main body 101, fill the gaps, keep the interior of the housing main body 101 airtight, and have waterproof, dustproof, and pressure resistance functions. The waterproof ring 108 is a high-density silicone rubber waterproof O-ring, which plays an airtight role at the detection component. The interior between the first isolation gasket 106 and the second isolation gasket 107 is fully filled with a high-performance waterproof filling material, further playing the roles of waterproof and dustproof.

[0029] At the same time, the sensing unit is connected to the main control MCU 109, and the communication module 110 is connected to the main control MCU 109. The ceramic osmotic pressure sensor 111 is connected to the AD chip 112; the AD chip 112 is connected to the main control MCU 109. The three-axis acceleration sensor 113 is connected to the main control MCU 109.

[0030] The main control MCU 109 selects a domestic chip with ultra-low power consumption, adopts a Cortex-M0+ 32-bit CPU platform, has a maximum working clock of 48MHZ, and a deep sleep working mode with a minimum of 0.6Ua@3V. It has product advantages such as low cost, low power consumption, and high performance, and is suitable for the design scheme of this product. It has peripherals such as serial ports, IIC, SPI, and timers, and the peripheral resources also meet the requirements of this utility model. The pressure acquisition scheme uses the ceramic osmotic pressure sensor 111 and the high-precision AD chip 112 for AD acquisition. The AD chip 112 has a 24-bit analog-to-digital conversion ability, includes an amplifier with a low-noise 128-fold gain, and can suppress the power supply 114 interference of 50Hz and 60Hz.

[0031] The acceleration sensor uses the high-performance three-axis acceleration sensor 113, which has a variety of acceleration acquisition ranges and can be configured according to requirements for different scenario usage schemes. For the detection scheme with small acceleration, a high-precision 2g scheme is used. For the usage scenario with large acceleration, a larger measurement range can also be used. The communication module 110 uses a 485 interface to communicate with the outside. The 485 chip is an ultra-low power consumption chip powered by 3.3V, with a minimum power consumption of 1.6uA, which can meet the power consumption requirements of this utility model and the power supply 114 design, etc. The water depth or water level height can be deduced by measuring the pressure of the water body on the sensor and converted into an electrical signal for output. This utility model not only has the core function of pressure monitoring, but also can simultaneously monitor the acceleration data of the device for functions such as calculating the tilt of the current device. The working principle of this utility model is to use a pressure sensor to measure the pressure in water. When the water body exerts pressure, the pressure sensor will generate a corresponding electrical signal, which is collected and processed by the AD chip 112, and finally an electrical signal proportional to the water pressure or water level height is output. In terms of data acquisition, this utility model performs excellently. It can accurately acquire the pressure and tilt of the current device's underwater position, providing accurate pressure information for engineers. This utility model has a wide range of applications in the fields of water conservancy, environmental monitoring, ocean engineering, etc. The following are some specific application scenarios: Water level monitoring: used to monitor the water level height of water bodies such as reservoirs, rivers, and wells. Water pressure monitoring: used to monitor the water pressure changes in hydraulic systems such as water pumps, water pipes, and water tanks. Ocean engineering: used to measure the water depth and seabed topography in the ocean, etc. Environmental monitoring: used to monitor the groundwater level, etc.

[0032] In addition, the power supply 114 is respectively connected to the AD chip 112, the three-axis acceleration sensor 113, the main control MCU 109, and the communication module 110.

[0033] The power supply 114 uses an ultra-low power consumption power supply 114 for voltage regulation. The external input voltage is 12V DC, and the acceptable input voltage range is 4.5V to 40V. It is converted to 4V through DCDC and then converted to 3.3V through LDO to supply power to the MCU and sensors. The input part of the power supply 114 uses MOS tubes to implement an anti-reverse connection function, which can prevent users from connecting the positive and negative poles of the power supply 114 incorrectly and causing hardware damage.

[0034] Using the osmotic pressure detection sensor of this embodiment, the ceramic osmotic pressure sensor 111 is used to measure the pressure in water. When water pressure is applied, the sensor will generate corresponding electrical signals, which are collected and processed by the AD chip 112, and finally an electrical signal proportional to the water pressure or water level height is output; in terms of data collection, the present utility model performs excellently. It can accurately collect the pressure and inclination at the underwater position of the current device, providing accurate pressure information for engineers. The present utility model has wide applications in the fields of water conservancy, environmental monitoring, ocean engineering, etc. The following are some specific application scenarios: Water level monitoring: used to monitor the water level height of water bodies such as reservoirs, rivers, and wells. Water pressure monitoring: used to monitor the water pressure changes in hydraulic systems such as water pumps, water pipes, and water tanks. Ocean engineering: used to measure the water depth and seabed topography in the ocean, etc. Environmental monitoring: used to monitor the groundwater level, etc. The present utility model supports using the host computer software to issue collection instructions to realize real-time collection of sensor data upload and reporting, ensuring the real-time nature of the data. It adopts advanced sensor devices and excellent filtering algorithms, etc. High-precision sensors are used to monitor and collect pressure data and acceleration data, with high accuracy and precision. It can adjust the power consumption ability and collection ability according to different application scenarios, and at the same time can meet the stress collection requirements in different scenarios. It has good environmental adaptability and stability, can work normally between -40 degrees Celsius and 80 degrees Celsius, and at the same time this device has excellent waterproof, dustproof, and pressure-resistant capabilities, and can work normally in harsh environments.

[0035] The second embodiment of this application is:

[0036] Based on the first embodiment, please refer to Figure 2 and Figure 3 , where Figure 3 is the step diagram of the osmotic pressure detection method of the second embodiment of the present utility model. Figure 4 is the flowchart of the osmotic pressure detection method of the second embodiment of the present utility model. An osmotic pressure detection method of this embodiment includes the following steps:

[0037] S201: Initialize the device;

[0038] S202: Determine whether the collection time has been reached;

[0039] S203: If the acquisition time is reached, collect the data and package it, and send the data to the upper device through the serial port. If the acquisition time is not reached, continue to determine whether the acquisition time is reached;

[0040] S204: Determine whether the transmission is successful. If the transmission is successful, continue to determine whether the acquisition is successful. If the transmission is not successful, continue to collect and send the data.

[0041] Specifically, initialize the device; determine whether the acquisition time is reached; if the acquisition time is reached, collect the data and package it, and send the data to the upper device through the serial port. If the acquisition time is not reached, continue to determine whether the acquisition time is reached; determine whether the transmission is successful. If the transmission is successful, continue to determine whether the acquisition is successful. If the transmission is not successful, continue to collect and send the data. Operate in a low-power mode. When there is no acquisition task and no external active query instruction is issued, the system is in a sleep state. Only when it is configured for high-speed acquisition or the host computer actively queries the sensor data, the hardware will wake up from the sleep state.

[0042] The utility model can effectively save energy consumption and extend the battery usage time.

[0043] What is disclosed above is only one or more preferred embodiments of the present application, and the scope of rights of the present application cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. An osmotic pressure detection sensor, comprising a shell body and a connector, wherein the connector is detachably connected to the shell body and is located at the top of the shell body, characterized in that: It also includes a filtering component and a detection component; The filter assembly includes a filter ring, a mounting ring, a lower shell and a sealing component. The filter ring is connected to the shell body and is located on a side of the shell body away from the connecting head. The mounting ring is located inside the filter ring. The mounting ring has a plurality of through holes, and the plurality of through holes penetrate the mounting ring. The lower shell is connected to the mounting ring and is located below the filter ring. The sealing component is located inside the shell body. The detection assembly is located inside the shell body.

2. The osmotic pressure detection sensor according to claim 1, characterized in that: The sealing component includes a first isolation gasket and a second isolation gasket, wherein the first isolation gasket is located between the housing body and the connector, and the second isolation gasket is located below the first isolation gasket.

3. The osmotic pressure detection sensor according to claim 2, characterized in that: The sealing component further comprises a waterproof ring, and the waterproof ring is located between the housing body and the detection component.

4. The osmotic pressure detection sensor according to claim 1, characterized in that: The detection component includes a sensor unit, a main control MCU and a communication module. The sensor unit is connected to the main control MCU, and the communication module is connected to the main control MCU.

5. The osmotic pressure detection sensor according to claim 4, characterized in that: The sensing unit includes a ceramic osmotic pressure sensor and an AD chip, wherein the ceramic osmotic pressure sensor is connected to the AD chip; and the AD chip is connected to the main control MCU.

6. The osmotic pressure detection sensor according to claim 5, characterized in that: The sensing unit also includes a three-axis acceleration sensor, and the three-axis acceleration sensor is connected to the main control MCU.

7. The osmotic pressure detection sensor according to claim 6, characterized in that: The osmotic pressure detection sensor also includes a power supply, which is respectively connected to the AD chip, the three-axis acceleration sensor, the main control MCU and the communication module.

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