Motor home water level detection device with water quality TDS (total dissolved solids) testing function
By introducing a combination of reed switches and platinum electrodes into the RV water level detection device, along with an MCU unit and operational amplifier, the problem of the inability to detect TDS in water quality in existing technologies has been solved, enabling accurate monitoring of water level and water quality.
Patent Information
- Application Number
- CN202520371415.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-03-05
AI Technical Summary
Existing RV water level detection devices cannot detect water quality, especially TDS values, and are easily contaminated due to limited installation space, affecting water safety.
The system uses a combination of reed switches and platinum electrodes distributed on the cylinder rod, along with an MCU unit and operational amplifier. It determines water level and water quality through magnetic floats and electrical signals, and uses platinum electrodes to detect the conductivity of the water to determine the TDS value.
It enables accurate detection of water level and TDS in RV water tanks, improving the accuracy and safety of water quality monitoring.
Smart Images
Figure CN223756126U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a house car water level detection device, especially a house car water level detection device with water quality TDS testing function. BACKGROUND
[0002] The existing house car water level detection device can only test the water level height in the water tank of the house car, and does not have the detection function for the water quality in the water tank of the house car. In practical application, the total dissolved solids (TDS) of water quality refers to the total amount of dissolved solids in water, including inorganic salts, organic matter and part of microorganisms, and the TDS value is usually expressed in milligrams per liter (mg / L) or parts per million (ppm). For the fresh water tank of the house car, it is usually installed at the lower part of the house car. Due to the narrow installation space, the use environment is relatively poor, so that the water quality of the water tank is easily polluted by the external environment. In addition, the water source added to the water tank is diverse, which is more likely to threaten the cleanliness and safety of drinking water. SUMMARY
[0003] The technical problem to be solved by the utility model is to provide a house car water level detection device which can accurately detect the water level of the house car and has the water quality TDS testing function.
[0004] To solve the above technical problems, the utility model adopts the following technical scheme.
[0005] A house car water level detection device with water quality TDS testing function comprises a cylinder rod and a detection mainboard, the detection mainboard comprises an MCU unit U1, an operational amplifier U2 and a plurality of sampling resistors, the plurality of sampling resistors are connected between a power supply end VCC and the ground in sequence after being connected in series, the connection points of two adjacent sampling resistors are connected with the MCU unit U1, one dry reed is connected in parallel with each sampling resistor, the plurality of dry reeds are distributed along the vertical direction of the cylinder rod in sequence, a magnetic float that can slide up and down is arranged on the cylinder rod, the dry reed is used for being closed under the magnetic force of the magnetic float, a first platinum electrode and a second platinum electrode are arranged on the cylinder rod, the electrical signal ends of the first platinum electrode and the second platinum electrode are connected to the two input ends of the operational amplifier U2 respectively, the output end of the operational amplifier U2 is connected to the MCU unit U1, and the MCU unit U1 is used for judging the conductivity of water body according to the electrical signals collected by the first platinum electrode and the second platinum electrode.
[0006] Preferably, a temperature sensor R7 is arranged on the cylinder rod, one end of the temperature sensor R7 is connected to the power supply end VCC through a resistor R5, the other end of the temperature sensor R7 is grounded, and the connection point of the temperature sensor R7 and the resistor R5 is connected with the MCU unit U1.
[0007] Preferably, the first platinum electrode, the second platinum electrode and the temperature sensor R7 are all arranged at the lower end of the barrel rod.
[0008] Preferably, the temperature sensor R7 is arranged at the center of the lower end of the barrel rod.
[0009] Preferably, the top end of the barrel rod is provided with a mounting flange.
[0010] Preferably, the detection mainboard is arranged on the top of the mounting flange.
[0011] In the house car water level detection device with water quality TDS testing function disclosed by the utility model, the barrel rod is vertically installed in the house car water tank, the reed tube and the sampling resistor are one-to-one corresponding and are parallel to each other, the magnetic float floats on the water surface in the house car water tank, when the magnetic float approaches a certain reed tube, the reed tube is closed under the magnetic force of the magnetic float, thereby short-circuiting the sampling resistor parallel to the reed tube, the voltage of the connecting point of two adjacent sampling resistors changes, the MCU unit U1 judges the house car water tank according to the voltage value fed back by two adjacent sampling resistors, because a plurality of reed tubes are arranged in the vertical direction of the barrel rod in sequence, the house car water level detection is more accurate, meanwhile, the electric signal collected by the first platinum electrode and the second platinum electrode is transmitted to the two input ends of the operational amplifier U2, is fed back to the MCU unit U1 after amplification processing of the operational amplifier U2, the MCU unit U1 judges the conductivity of water body according to the electric signal collected by the first platinum electrode and the second platinum electrode, and then judges the water quality condition according to the size of the conductivity of water body, the information representing the water quality condition can be transmitted to the house car control system through the communication interface, so that the user can master the water quality condition of the house car water tank, and the water quality TDS testing function is better realized. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 It is a structural schematic view of the house car water level detection device.
[0013] Figure 2 It is a circuit principle view of the house car water level detection device. DETAILED DESCRIPTION
[0014] The utility model will be described in more detail in combination with the drawings and examples.
[0015] The utility model discloses a house car water level detection device with water quality TDS testing function, combines Figure 1 and Figure 2As shown, it includes a cylinder rod 1 and a detection mainboard 2, the detection mainboard 2 includes an MCU unit U1, an operational amplifier U2 and a plurality of sampling resistors, the plurality of sampling resistors are connected between a power supply end VCC and ground in series, the connection points of two adjacent sampling resistors are connected with the MCU unit U1, each sampling resistor is connected with a reed switch 3 in parallel, the plurality of reed switches 3 are distributed along the vertical direction of the cylinder rod 1, the cylinder rod 1 is provided with a magnetic float 4 which can slide up and down, the reed switch 3 is used for closing under the magnetic force of the magnetic float 4, the cylinder rod 1 is provided with a first platinum electrode 5 and a second platinum electrode 6, the electrical signal ends of the first platinum electrode 5 and the second platinum electrode 6 are connected with two input ends of the operational amplifier U2 respectively, the output end of the operational amplifier U2 is connected with the MCU unit U1, and the MCU unit U1 is used for judging the conductivity of water according to the electrical signals collected by the first platinum electrode 5 and the second platinum electrode 6.
[0016] In the above structure, the cylinder rod 1 is vertically installed in a motor home water tank, the reed switch 3 corresponds to the sampling resistor one by one and is connected in parallel with each other, the magnetic float 4 floats on the water surface in the motor home water tank, when the magnetic float 4 approaches a certain reed switch 3, the reed switch 3 is closed under the magnetic force of the magnetic float 4, thereby short-circuiting the sampling resistor connected in parallel with the reed switch 3, the voltage of the connection points of two adjacent sampling resistors changes, the MCU unit U1 judges the motor home water tank according to the voltage value fed back by the two adjacent sampling resistors, because the plurality of reed switches 3 are arranged along the vertical direction of the cylinder rod 1, the motor home water level detection is more accurate, meanwhile, the electrical signals collected by the first platinum electrode 5 and the second platinum electrode 6 are transmitted to the two input ends of the operational amplifier U2, and are fed back to the MCU unit U1 after amplification processing of the operational amplifier U2, the MCU unit U1 judges the conductivity of water according to the electrical signals collected by the first platinum electrode 5 and the second platinum electrode 6, and judges the water quality condition according to the size of the conductivity of water, the information representing the water quality condition can be transmitted to the motor home control system through a communication interface, so that the user can master the water quality condition of the motor home water tank, and the water quality TDS test function is realized better.
[0017] In the embodiment, the reed switch is arranged in the insulating cylinder rod, the magnetic float rises or falls along with the change of the water level, the corresponding reed switch is attracted or disconnected, the MCU detects the corresponding level change, and then calculates the corresponding water level.
[0018] The utility model discloses a temperature detection function, specifically point to, the cylinder rod 1 is equipped with temperature sensor R7, one end of temperature sensor R7 is connected to power supply end VCC through resistance R5, the other end of temperature sensor R7 is grounded, and the connection point of temperature sensor R7 and resistance R5 is connected with MCU unit U1.
[0019] In the embodiment, the first platinum electrode 5, the second platinum electrode 6 and the temperature sensor R7 are arranged at the lower end of the barrel rod 1. Further, the temperature sensor R7 is arranged at the center of the lower end of the barrel rod 1.
[0020] In practical application, the first platinum electrode 5 and the second platinum electrode 6 are arranged at the two sides of the bottom of the barrel rod, and the signal is amplified through the operational amplifier circuit on the PCB. The MCU detects the corresponding level change, and calculates the TDS value of the water quality through the conductivity of the water temperature and water quality and the preset algorithm.
[0021] Meanwhile, the temperature sensor is arranged at the middle of the bottom of the insulating barrel rod, and is used for sensing the change of the water temperature. The MCU detects the corresponding level change, and further calculates the corresponding water temperature.
[0022] In the embodiment, the top end of the barrel rod 1 is provided with a mounting flange 7. Further, the detection mainboard 2 is arranged at the top of the mounting flange 7.
[0023] Further, the inside of the barrel rod is filled with sealing glue, which has the effect of insulation and waterproof. In practical application, the information representing the water quality condition can be transmitted to the recreational vehicle control system through the RS485 communication interface.
[0024] The above is only the preferred embodiment of the present application, and is not used for limiting the present application. Any modification, equivalent replacement or improvement within the technical scope of the present application shall be included in the scope of protection of the present application.
Claims
1. A house car water level detection device with water quality TDS test function, characterized in that, The application relates to a water conductivity detector, which comprises a cylinder rod (1) and a detection main plate (2), wherein the detection main plate (2) comprises an MCU unit U1, an operational amplifier U2 and a plurality of sampling resistors; the plurality of sampling resistors are connected in series between a power supply end VCC and the ground; the connection points of two adjacent sampling resistors are connected with the MCU unit U1; each sampling resistor is connected with a dry reed (3) in parallel; the plurality of dry reeds (3) are distributed along the vertical direction of the cylinder rod (1) in sequence; a magnetic float (4) is arranged on the cylinder rod (1) and can slide up and down; the dry reed (3) is used for being closed under the magnetic force of the magnetic float (4); a first platinum electrode (5) and a second platinum electrode (6) are arranged on the cylinder rod (1); the electric signal ends of the first platinum electrode (5) and the second platinum electrode (6) are respectively connected with two input ends of the operational amplifier U2; the output end of the operational amplifier U2 is connected with the MCU unit U1; the MCU unit U1 is used for judging the conductivity of a water body according to the electric signals collected by the first platinum electrode (5) and the second platinum electrode (6).
2. The RV water level detection device with water quality TDS testing function of claim 1, wherein, A temperature sensor R7 is arranged on the cylinder rod (1); one end of the temperature sensor R7 is connected with the power supply end VCC through a resistor R5; the other end of the temperature sensor R7 is grounded; the connection point of the temperature sensor R7 and the resistor R5 is connected with the MCU unit U1.
3. The RV water level detection device with water quality TDS testing function of claim 2, wherein, The first platinum electrode (5), the second platinum electrode (6) and the temperature sensor R7 are all arranged at the lower end of the cylinder rod (1).
4. The RV water level detection device with water quality TDS testing function of claim 3, wherein, The temperature sensor R7 is arranged at the center of the lower end of the cylinder rod (1).
5. The RV water level detection device with water quality TDS testing function of claim 1, wherein, A mounting flange (7) is arranged at the top end of the cylinder rod (1).
6. The RV water level detection device with water quality TDS testing function of claim 5, wherein, The detection main plate (2) is arranged at the top of the mounting flange (7).