Rammed earth water content sensor

Abstract

The utility model discloses a rammed earth moisture content sensor, which belongs to the technical field of geological detection and comprises a conversion component. One end of the detection assembly is connected with the conversion assembly; the detection assembly comprises a sensor detection head and a sensor probe; one end of the sensor detection head is connected with the plurality of sensor probes, and the other end of the sensor detection head is connected with the conversion assembly; when the water content of soil layers with different depths of rammed earth needs to be detected, the plurality of sensor probes can be buried into the soil layers with the corresponding depths, and then corresponding data of the corresponding depths of the rammed earth can be read by sending a query instruction to the electronic bin; the rammed earth moisture content measuring device effectively avoids multiple strong disturbances of soil geology caused by repeated installation of sensors for multiple repeated measurement of rammed earth moisture content data, multiple layers of sensor probes simultaneously measure the rammed earth moisture content data, mutual verification is carried out, the accuracy and credibility of the data are improved, and contingency caused by an installation mode is reduced.

Description

Technical Field

[0001] This utility model relates to the field of geological assessment technology, specifically to a soil moisture content sensor. Background Technology

[0002] A soil moisture sensor is a device used to monitor temperature and humidity in soil. It typically consists of one or more sensors that convert soil temperature and humidity into electrical signals, and then record and analyze the data in real time by connecting to a data acquisition system or monitoring equipment. This type of sensor has wide applications in geological exploration, environmental protection, and cultural relic preservation. Particularly in geological research, environmental protection, and cultural relic preservation, it can help monitor changes in soil temperature and humidity, thus providing a basis for assessing geological conditions such as groundwater levels and soil stability. It analyzes soil moisture status and temperature fluctuations, providing data support for ecological environment monitoring and soil degradation prevention, helping to control the environmental conditions for the preservation of tangible cultural heritage sites, and delaying the aging and damage of cultural relics.

[0003] Current soil moisture sensors generally have certain limitations. Most existing soil moisture sensors are needle-shaped or flat plate structures, which are prone to poor contact in high-pressure and large-particle environments, resulting in unsatisfactory data collection. In addition, most sensors use wired transmission, which makes wiring difficult in complex construction scenarios. Summary of the Invention

[0004] To address the problems of existing technologies, this utility model provides a rammed soil moisture content sensor, comprising: a conversion component for converting the detected soil moisture content signal into data and then outputting it;

[0005] A detection component, one end of which is connected to the conversion component, is used to detect the soil moisture content and send the detected soil moisture content signal to the conversion component;

[0006] The detection component includes: a sensor probe head and a sensor probe;

[0007] One end of the sensor probe is connected to a plurality of sensor probes, and the other end of the sensor probe is connected to the conversion assembly;

[0008] The sensor probe surface is uniformly provided with multiple grooves.

[0009] Furthermore, the conversion component includes: a housing and a control system circuit board;

[0010] The control system circuit board is disposed inside the chamber.

[0011] A data export port is provided on one side of the chamber, and the data export port is connected to the control system circuit board; a cable connection end is provided on the other side of the chamber, and the cable connection end is connected to the control system circuit board, and the cable connection end is also connected to the sensor probe through a signal transmission line.

[0012] Furthermore, the control system circuit board includes: a voltage conversion circuit, a sensor body communication circuit, a data query terminal communication circuit, a main control circuit, a circuit board communication interface, and a power indicator circuit, all connected to the energy storage unit.

[0013] The main control circuit is connected to the power conversion circuit, the sensor body communication circuit, and the data query terminal communication circuit, respectively. The data query terminal communication circuit is connected to the data export port.

[0014] The voltage conversion circuit is connected to the power indicator circuit, and the voltage indicator circuit is also connected to the main control circuit;

[0015] The communication interface is connected to the signal transmission line.

[0016] Furthermore, a data upload end through hole is provided on one side of the sensor probe, and the data upload end through hole is connected to the signal transmission line;

[0017] The other side of the sensor probe head is connected to the sensor probe, and an epoxy resin layer is provided at the contact position between the sensor probe and the sensor probe head.

[0018] Furthermore, the sensor probe has a needle-like structure.

[0019] Furthermore, the signal transmission line includes a waterproof rubber sheath and several PVC multi-strand soft copper core wires, with the waterproof rubber sheath wrapping the PVC multi-strand soft copper core wires to form the signal transmission line.

[0020] The beneficial effects of this utility model are:

[0021] When it is necessary to detect the moisture content of rammed soil at different depths, several sensor probes can be buried in the corresponding depths of the soil. Since the surface of the sensor probes is provided with grooves, the contact area between the sensor probes and the soil can be increased in large-particle soil. Then, by sending a query command to the electronic chamber, the corresponding data of the rammed soil at the corresponding depth can be read. This effectively avoids repeated installation of sensors to repeatedly measure the moisture content of rammed soil, which would cause multiple strong disturbances to the soil geology. The simultaneous measurement of the moisture content of rammed soil by multiple sensor probes mutually corroborates each other, improving the accuracy and reliability of the data. Attached Figure Description

[0022] Figure 1A schematic diagram of the voltage conversion circuit provided by this utility model;

[0023] Figure 2 A schematic diagram of the communication circuit at the sensor body end provided by this utility model;

[0024] Figure 3 This is a schematic diagram of the main control circuit provided by this utility model;

[0025] Figure 4 The schematic diagram of the circuit board communication interface circuit and power indicator circuit provided by this utility model is shown.

[0026] Figure 5 A schematic diagram of the connection structure of the detection component provided by this utility model;

[0027] Figure 6 A schematic diagram of the conversion component provided by this utility model.

[0028] Figure label:

[0029] In the diagram: 1 is the voltage conversion circuit, 2 is the sensor body communication circuit, 3 is the data query communication circuit, 4 is the main control circuit, 5 is the circuit board communication interface, 6 is the power indicator circuit, 7 is the signal transmission line, 8 is the compartment cover, 9 is the compartment body, 10 is the cable connection end, 11 is the data export port, 12 is the data upload through hole, 13 is the sensor probe head, 14 is the sensor probe, and 15 is the epoxy resin layer. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-6 This utility model provides a soil moisture content sensor, including: a conversion component for converting the detected soil moisture content signal into data and then outputting it;

[0032] A detection component, one end of which is connected to the conversion component, is used to detect the soil moisture content and send the detected soil moisture content signal to the conversion component;

[0033] The conversion component includes: a chamber 9 and a control system circuit board;

[0034] The control system circuit board is located inside the chamber 9; a chamber cover 8 is provided on the top of the chamber; the chamber and the chamber cover are not completely fixedly connected, and the control system circuit board is located inside the chamber. The control system circuit board reads instructions or automatically monitors and feeds back data information from the detection components. If the equipment malfunctions, the control system circuit board can be evaluated simply by removing the chamber cover if necessary.

[0035] A data export port 11 is provided on one side of the chamber 9, and the data export port 11 is connected to the control system circuit board; a cable connection end 10 is provided on the other side of the chamber 9, and the cable connection end 10 is connected to the control system circuit board. The cable connection end 10 is also connected to the sensor probe 13 through a signal transmission line 7.

[0036] The control system circuit board includes: a voltage conversion circuit 1, a sensor body communication circuit 2, a data query terminal communication circuit 3, a main control circuit 4, a circuit board communication interface 5, and a power indicator circuit 6, all connected to the energy storage unit.

[0037] The main control circuit 4 is an STM32F103C8T6. The main control circuit 4 is connected to the power conversion circuit, the sensor body communication circuit 2 and the data query terminal communication circuit 3 respectively. The data query terminal communication circuit 3 is connected to the data export port 11.

[0038] The voltage conversion circuit 1 is connected to the power indicator circuit 6, and the voltage indicator circuit is also connected to the main control circuit 4;

[0039] The communication interface is connected to the signal transmission line 7;

[0040] The voltage conversion circuit 1 is model RT9013-33GB, the sensor body communication circuit 2 is model MAX3485ESA, and the data query terminal communication circuit 3 is model MAX3491ESD.

[0041] The main control circuit includes a main control chip U2. The power supply pin of the main control chip U2 is connected to a 3.3V circuit. The reset pin of the main control chip is led out through a pin header. The second serial port input / output of the main control chip U2 is connected to the input / output pin of the sensor body communication circuit. The first serial port input / output of the main control chip U2 is connected to the input / output pin of the data query terminal communication circuit. The ground pin of the main control chip U2 is grounded.

[0042] The main control chip U2 is a microcontroller, model STM32F103C8T6. The VBAT, VDDA, VDD_1, VDD_2, and VDD_3 pins of the main control chip U2 are all connected to a 3.3V voltage source. One end of capacitor C5 is grounded, and the other end is connected to the VDD_3 pin of the microcontroller chip U2, which is connected to the 3.3V voltage source. Capacitor C6 is connected in parallel with capacitor C5, and capacitors C10 and C11 are connected in parallel. One end of capacitors C10 and C11 is connected to the VSSA pin of the microcontroller chip U2, which is connected to ground. The other ends of capacitors C10 and C11 are connected to the microcontroller's VDDA pin and then to a 3.3V voltage source. One end of capacitor C12 is connected to the microcontroller chip U2's VSS_1 pin and then to ground. The other end of capacitor C12 is connected to the microcontroller chip U2's VDD_1 pin and then to a 3.3V voltage source. One end of capacitor C18 is connected to the microcontroller chip U2's VSS_2 pin and then to ground. The other end of capacitor C12 is connected to the microcontroller chip U2's VDD_2 pin and then to a 3.3V voltage source. The main control chip U2's BOOT0 pin is grounded through resistor R20.

[0043] The sensor's on-device communication circuit includes an RS485 transceiver chip U4. The power pin of the half-duplex RS485 transceiver chip U4 is connected to a 3.3V internal voltage source, and the power pin is connected to one end of capacitor C13. The ground pin of the half-duplex RS485 transceiver chip U4 is connected to the other end of capacitor C13. Pins A and B of the half-duplex RS485 transceiver chip U4 are connected in parallel through resistor R23. Pins A and B of the half-duplex RS485 transceiver chip U4 are pulled up and pulled down respectively through resistors R16 and R28 to output a high signal. The RS485 signal with low noise is provided. The RO pin of the half-duplex RS485 transceiver chip U4 is pulled up through resistor R17 to enable normal communication with the microcontroller's serial port 2. The RE pin and DE pin of the half-duplex RS485 transceiver chip U4 are connected as a common control terminal. The TTL level data input / output pins of the half-duplex RS485 transceiver chip U4 are connected to the second serial port input / output port of the main control chip. The 485 protocol level data input / output pins of U4 are led out to the crimp terminal, which is fixedly connected to the control system circuit board by soldering.

[0044] In one implementation example, the data query terminal communication circuit includes an RS485 transceiver chip U3. The power supply pin of the full-duplex RS485 transceiver chip U3 is connected to a 3.3V internal voltage source. The power supply pin is also connected to one end of capacitors C7 and C9. Capacitors C7 and C9 are connected in parallel, one end of which is connected to the power supply pin of the full-duplex RS485 transceiver chip U3, and the other end is connected to ground, thus providing a stable voltage source for the full-duplex RS485 transceiver chip U3. The ground pin of the full-duplex RS485 transceiver chip U3 is grounded. The Y and Z pins of transceiver chip U3 are connected in parallel through resistor R15; the Z and Y pins of full-duplex RS485 transceiver chip U3 are pulled up and pulled down through resistors R14 and R16 respectively to output a high signal-to-noise ratio RS485 signal; the TTL level data input / output pins of full-duplex RS485 transceiver chip U4 are connected to the first serial port input / output serial port of the main control chip U2; the 485 protocol level data input / output pins of U3 are led out to the crimp terminal, and the crimp terminal is fixedly connected to the control system circuit board by soldering.

[0045] In one implementation example, the voltage conversion circuit includes a voltage conversion chip U1, which converts an external 5V voltage source into a 3.3V internal voltage source and outputs it. The EN pin of the voltage conversion chip U1 is connected to one end of a resistor R8, and the other end of the resistor R8 is connected to the 3.3V voltage source. The voltage input terminal of the voltage conversion chip U1 is connected to a 5V external power supply. The ground pin of the voltage conversion chip U1 is grounded. Capacitors C3 and C4 are connected in parallel. One end of capacitors C3 and C4 is connected to the voltage input terminal of the voltage conversion chip U1 to filter out high-frequency components from the external voltage source input and improve the voltage source quality. The other end of capacitors C3 and C4 is connected to ground. The voltage output terminal and ground terminal of the voltage conversion chip U1 are connected in parallel with capacitors C1 and C2. The ground terminal of the voltage conversion chip U1 is grounded to filter out high-frequency components from the 3.3V internal voltage source and improve the internal voltage source quality.

[0046] In one implementation example, the power indicator circuit includes a current-limiting resistor R22 and a light-emitting diode D1. One end of the current-limiting resistor R22 is connected to an internal 3.3V voltage source, and the other end of the current-limiting resistor R22 is connected to the positive terminal of the light-emitting diode D1. The negative terminal of the light-emitting diode D1 is grounded. When the voltage conversion circuit outputs a 3.3V voltage source, the light-emitting diode D1 of the power indicator circuit lights up to indicate the power supply.

[0047] In one implementation example, the detection component is connected to the sensor probe end through-hole of the integrated control electronic compartment via a waterproof rubber signal transmission line. This allows the internal multi-strand soft copper wire signal lines to be connected to the sensor probe end communication circuit via terminals, thus connecting to the main control circuit. To query data, the waterproof rubber signal line is connected to the data query end through-hole of the integrated control electronic compartment, allowing the internal multi-strand soft copper wire signal lines to be connected to the data query end communication circuit via terminals. A command is then sent to query the detector data.

[0048] The detection assembly includes: a sensor detection head 13 and a sensor probe 14;

[0049] One end of the sensor probe 13 is connected to a plurality of sensor probes 14, and the other end of the sensor probe 13 is connected to the conversion assembly; a plurality of grooves are uniformly provided on the surface of the sensor probes;

[0050] The sensor probe head and sensor probe are fixedly connected by welding, which increases stability during use and thus provides accurate raw measurement data.

[0051] A data upload through-hole 12 is provided on one side of the sensor probe 13, and the data upload through-hole 12 is connected to the signal transmission line 7; the signal transmission line 7 includes a waterproof rubber sheath and several PVC multi-strand soft copper core wires, and the waterproof rubber sheath wraps the PVC multi-strand soft copper core wires to form the signal transmission line 7.

[0052] The other side of the sensor probe 13 is connected to the sensor probe 14, and an epoxy resin layer 15 is provided at the contact position between the sensor probe 14 and the sensor probe 13. Injecting a high-density epoxy resin layer at the welding point between the sensor probe and the sensor probe ensures the waterproofness and sealing of the sensor probe body (detection component).

[0053] The sensor probe 14 has a needle-like structure.

[0054] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rammed earth moisture content sensor, characterised in that, include: The conversion component is used to convert the detected soil moisture content signal into data and output it. A detection component, one end of which is connected to the conversion component, is used to detect the soil moisture content and send the detected soil moisture content signal to the conversion component; The detection component includes: a sensor probe head and a sensor probe; One end of the sensor probe is connected to a plurality of sensor probes, and the other end of the sensor probe is connected to the conversion assembly; The sensor probe surface is uniformly provided with multiple grooves.

2. The soil moisture sensor of claim 1, wherein, The conversion components include: a chamber and a control system circuit board; The control system circuit board is disposed inside the chamber. A data export port is provided on one side of the chamber, and the data export port is connected to the control system circuit board; a cable connection end is provided on the other side of the chamber, and the cable connection end is connected to the control system circuit board, and the cable connection end is also connected to the sensor probe through a signal transmission line.

3. The soil moisture sensor of claim 2, wherein, The control system circuit board includes: a voltage conversion circuit, a sensor body communication circuit, a data query terminal communication circuit, a main control circuit, a circuit board communication interface, and a power indicator circuit, all connected to the energy storage unit. The main control circuit is connected to the voltage conversion circuit, the sensor body communication circuit, and the data query terminal communication circuit, respectively. The data query terminal communication circuit is connected to the data export port. The voltage conversion circuit is connected to the power indicator circuit, and the power indicator circuit is also connected to the main control circuit; The communication interface is connected to the signal transmission line.

4. The soil moisture sensor of claim 2, wherein, A data upload end through hole is provided on one side of the sensor probe, and the data upload end through hole is connected to the signal transmission line; The other side of the sensor probe head is connected to the sensor probe, and an epoxy resin layer is provided at the contact position between the sensor probe and the sensor probe head.

5. The soil moisture sensor of claim 4, wherein, The sensor probe has a needle-like structure.

6. The soil moisture sensor of claim 2, wherein, The signal transmission line includes a waterproof rubber sheath and several PVC multi-strand soft copper core wires, with the waterproof rubber sheath wrapping the PVC multi-strand soft copper core wires to form the signal transmission line.

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