CN221007884U

CN221007884U - Isolation controllable type water inlet detection sensor

Info

Publication number: CN221007884U
Application number: CN202322277352.9U
Authority: CN
Inventors: 谢业海
Original assignee: Yunnan Shuangzhou Technology Co ltd
Current assignee: Yunnan Shuangzhou Technology Co ltd
Priority date: 2023-08-24
Filing date: 2023-08-24
Publication date: 2024-05-24
Anticipated expiration: 2033-08-24

Abstract

The utility model provides an isolation controllable water inlet detection sensor which is used for water inlet detection and identification, and comprises a secondary power supply circuit, a CPU circuit, an isolation control circuit, a detection circuit, a feedback isolation circuit and a sensor probe; the secondary power supply circuit mainly provides power supply required by a CPU circuit, an isolation control circuit, a detection circuit and a feedback isolation circuit; after receiving the detection instruction, the CPU circuit controls the sensor probe to be connected through the isolation expansion circuit, then the detection circuit judges the water inlet detection result according to the collected voltages at two ends of the sensor probe and the set voltage threshold value, the feedback isolation circuit feeds the detection result back to the CPU circuit, and the CPU circuit transmits the detection result outwards through the communication interface. The utility model realizes the controllable detection of the water inlet detection sensor in the instruction state, and solves the problem that the sensor probe is easy to leak electricity through isolation measures.

Description

Isolation controllable type water inlet detection sensor

Technical Field

The utility model relates to a water inlet detection sensor, in particular to an isolation controllable water inlet detection sensor.

Background

The underwater detection is widely applied to the underwater unmanned underwater vehicle, and when the unmanned underwater vehicle is identified to be in the underwater state, the detection signal of the sensor is used as the basis for starting the unmanned underwater vehicle to navigate. In the prior art, most probes of the water-entering detection sensor are resistors and are arranged on the outer side of a shell of the unmanned submersible vehicle, and due to the conductivity of seawater, the probe power supply of the sensor probe and the submersible vehicle shell are easy to have electricity leakage; in addition, in the actual situation, the water inlet detection sensor does not need to work for a long time, and if the working state of the water inlet detection sensor can be controlled, the energy consumption can be saved, and the leakage fault can be reduced.

Disclosure of utility model

Aiming at the problems of electric leakage and energy saving of the water inlet detection sensor, the utility model provides an isolation controllable water inlet detection sensor which is used for detecting the water inlet state and controlling the working start-stop state of the sensor.

An isolation controllable water inlet detection sensor is used for water inlet detection and identification and is characterized by comprising a secondary power supply circuit, a CPU circuit, an isolation control circuit, a detection circuit, a feedback isolation circuit and a sensor probe; the secondary power supply circuit provides power supply required by the CPU circuit, the isolation control circuit, the detection circuit and the feedback isolation circuit; the CPU circuit sends out a detection control signal to drive the isolation control circuit to connect the sensor probe; the detection circuit collects voltages at two ends of the sensor probe, compares the voltages with a set voltage threshold value, and outputs a detection result; and the feedback isolation circuit is used for driving and isolating the output result of the detection circuit and feeding back the output result to the CPU circuit.

Preferably, the secondary power supply circuit further comprises a DCDC module and a voltage stabilizing circuit, wherein the DCDC module provides an isolation power supply for detection for the isolation control circuit, the detection comparison circuit and the feedback isolation circuit; the voltage stabilizing circuit provides normal voltage power for the CPU circuit, the isolation control circuit and the feedback isolation circuit.

Preferably, the CPU circuit further comprises a communication interface, and the communication interface is used for information interaction between the sensor and the outside.

Preferably, the isolation control circuit further comprises a control signal amplifying circuit and an isolation circuit, wherein the control signal amplifying circuit amplifies a control signal output by the CPU circuit, and then the amplified control signal drives the isolation circuit to control the on state of the probe.

Preferably, the detection circuit further comprises a threshold setting circuit and a comparison circuit; the threshold setting circuit is used for setting the lowest detection voltage threshold; the comparison circuit compares the lowest detection voltage threshold value with the detection voltage of the sensor probe, so that the water-in detection result is identified.

Preferably, the feedback isolation circuit further comprises a driving circuit, and the driving circuit is used for amplifying the output signal of the comparator in the detection circuit and driving the isolation device.

Drawings

FIG. 1 is a block diagram of the structure of the present utility model;

FIG. 2 is a diagram of a secondary power source configuration of the present utility model;

FIG. 3 is a block diagram of the CPU circuit of the present utility model;

FIG. 4 is a schematic diagram of an isolation control circuit of the present utility model;

FIG. 5 is a sensor probe circuit of the present utility model;

FIG. 6 is a schematic diagram of a detection circuit of the present utility model;

fig. 7 is a schematic diagram of a feedback isolation circuit according to the present utility model.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present utility model more clear, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

Referring to fig. 1, the steering engine controller of the underwater brushless motor comprises a secondary power supply circuit 1, a CPU circuit 2, an isolation control circuit 3, a sensor probe 4, a detection circuit 5 and a feedback isolation circuit 6.

In fig. 1, a secondary power supply 1 provides respective required direct current power supplies for a CPU circuit 2, an isolation control circuit 3, a sensor probe 4, a detection circuit 5 and a feedback isolation circuit 6; the CPU circuit 2 sends out detection control signals and is connected with the sensor probe 4 through the isolation control circuit 3; the detection circuit 5 collects the voltages at two ends of the sensor probe 4, compares the voltages with a set voltage threshold of the detection circuit 5, and outputs an input water detection result; the feedback isolation circuit 6 performs driving isolation on the output result of the detection circuit 5, and feeds back the result to the CPU circuit 2.

Referring to fig. 2, the secondary power supply circuit comprises a 3.3V voltage stabilizing circuit and an isolated DCDC circuit, wherein the voltage stabilizing circuit provides 3.3V power for the CPU circuit of fig. 3, the isolation control circuit of fig. 4 and the feedback isolation circuit of fig. 6; the isolated DCDC circuit provides a 5V isolated power supply for the isolated control circuit of fig. 4, the sensor probe of fig. 5, the detection circuit of fig. 6, and the feedback isolation circuit of fig. 7.

Referring to fig. 3, a CPU in the CPU circuit is a single-chip microcomputer, wherein a control output signal output by an IO port of the single-chip microcomputer controls the power on of the sensor probe of fig. 5 through the isolation control circuit of fig. 4; the singlechip IO input port is used for receiving a feedback input signal from the feedback isolation circuit of FIG. 7; the communication interface in fig. 3 is used for communication between the water inlet detection sensor and the outside, and includes an external instruction receiving interface and an external feedback detection interface.

In the isolation control circuit of fig. 4, the triode Q6 and the resistors R69 to R71 form an amplifying circuit for improving the driving capability of the CPU circuit of fig. 3 to control the output signal; u21 is an optical coupling isolation device, two ends of U21 are powered by different power supplies, wherein the output end is a 5V isolation power supply; when the control output signal of the CPU circuit of FIG. 3 is valid, the U21 optocoupler is in a conducting state, i.e. the probe+pin of FIG. 4 is connected with a 5V power supply.

In the practice of the present utility model, the sensor probe of FIG. 5 is comprised of two resistors in parallel, with probe+ and probe-being interchangeable.

U8 in the detection circuit of FIG. 6 is a voltage comparator chip, pin 2 is a non-inverting input terminal, pin 3 is an inverting input terminal, and pin 7 is an output terminal; the resistor R72 and the sensor probe of FIG. 5 are connected in series to form a voltage division network, when water is introduced, the resistance of the sensor probe of FIG. 5 is reduced, the voltage value on the resistor R72 is increased, and the voltage value of the R72 is measured by the U8 non-inverting input end; the voltage division network formed by the resistors R75 and R76 is used for setting the minimum threshold value of the detection voltage, and the threshold value is provided for the inverting input end of U8; when water in occurs, the voltage of the non-inverting input end of the U8 is higher than the voltage of the inverting input end, namely the pin 7 of the U8 outputs a high level.

In the feedback isolation circuit of fig. 7, U23 is a two-channel and gate, pins 1 and 2 of U23 are input ends, pin 4 of U23 is an output end, in this embodiment, pins 1 and 2 are short-circuited for improving signal driving capability, and pins 1 and 2 are connected with the output signal of the comparator of fig. 6; u24 in fig. 7 is an optocoupler isolation device for isolating and converting the detection result signal into a level signal usable by the CPU circuit of fig. 3.

Claims

1. An isolation controllable water inlet detection sensor is used for water inlet detection and identification and is characterized by comprising a secondary power supply circuit, a CPU circuit, an isolation control circuit, a detection circuit, a feedback isolation circuit and a sensor probe; the secondary power supply circuit provides power supply required by the CPU circuit, the isolation control circuit, the detection circuit and the feedback isolation circuit; the CPU circuit sends out a detection control signal to drive the isolation control circuit to connect the sensor probe; the detection circuit collects voltages at two ends of the sensor probe, compares the voltages with a set voltage threshold value, and outputs a detection result; and the feedback isolation circuit is used for driving and isolating the output result of the detection circuit and feeding back the output result to the CPU circuit.

2. The isolated controllable water inlet detection sensor according to claim 1, wherein the secondary power supply circuit further comprises a DCDC module and a voltage stabilizing circuit, and the DCDC module provides an isolated power supply for detection for the isolated control circuit, the detection comparison circuit and the feedback isolation circuit; the voltage stabilizing circuit provides normal voltage power for the CPU circuit, the isolation control circuit and the feedback isolation circuit.

3. The sensor of claim 1, wherein the CPU circuit further comprises a communication interface for interaction of the sensor with external information.

4. The sensor of claim 1, wherein the isolation control circuit further comprises a control signal amplifying circuit and an isolation circuit, the control signal amplifying circuit amplifies the control signal output by the CPU circuit, and the amplified control signal drives the isolation circuit to control the on state of the probe.

5. The isolated controllable water inlet detection sensor according to claim 1, wherein the detection circuit further comprises a threshold setting circuit and a comparison circuit; the threshold setting circuit is used for setting the lowest detection voltage threshold; the comparison circuit compares the lowest detection voltage threshold value with the detection voltage of the sensor probe, so that the water-in detection result is identified.

6. The sensor of claim 1, wherein the feedback isolation circuit further comprises a driver circuit for amplifying the comparator output signal of the sensor circuit and driving the isolation device.