WO2021142862A1

WO2021142862A1 - Liquid testing apparatus, holding tank, device, and testing method

Info

Publication number: WO2021142862A1
Application number: PCT/CN2020/074318
Authority: WO
Inventors: 石雷钧; 郭斌; 沈舟
Original assignee: 上海联芊电子科技有限公司
Priority date: 2020-01-17
Filing date: 2020-02-05
Publication date: 2021-07-22
Also published as: CN111175375A

Abstract

Provided are a liquid testing apparatus, a holding tank, a device, and a testing method. A first acoustic wave testing component (21) of the testing apparatus is used, at a preset distance, to transmit an acoustic wave and receive a test wave corresponding to the acoustic wave in a liquid (11); a temperature measurement component (22) is used to measure the temperature of the liquid (11); a power supply component is electrically connected to the first acoustic wave testing component (21), the temperature measurement component (22) and a controller; and the controller is electrically connected to the first acoustic wave testing component (21) and the temperature measurement component (22), so as to calculate an acoustic wave propagation velocity in the liquid (11) according to the preset distance, the time at which the first acoustic wave testing component (21) transmits a first acoustic wave, and the testing time at which the first acoustic wave testing component receives a test wave corresponding to the first acoustic wave, and to then determine a liquid type or a liquid concentration according to the acoustic wave propagation velocity in the liquid (11) and the temperature of the liquid (11) measured by the temperature measurement component (22). The liquid testing apparatus automatically tests a liquid in real time, and determines a liquid type or a liquid concentration in real time, such that the labor costs used are reduced.

Description

Liquid detection device, containing box, equipment and detection method

Technical field

This application relates to the technical field of liquid detection, and in particular to a liquid detection device, a containment box, equipment, and a detection method.

Background technique

With the development of industrial technology, tanks containing liquids are widely used in various equipment. Tanks containing liquids include fuel tanks, coolant tanks, urea tanks, water tanks, oil tanks, etc. In order to ensure the performance of the equipment operation, it is necessary to detect the liquid type or liquid concentration of the liquid in the tank, and even in many cases it is necessary to detect the liquid type or liquid concentration of the liquid in the tank in use in real time. The inlet of the tank containing the liquid is relatively narrow, and it is difficult to detect the liquid type or liquid concentration of the liquid in the tank; it is even more difficult to detect the liquid type or liquid concentration of the liquid in the tank being used. Therefore, it is particularly important to develop a liquid detection device that can detect the liquid type or liquid concentration of the liquid in the tank in real time.

Application content

Based on this, it is necessary to address the above problems and propose a liquid detection device, containment box, equipment, and detection method to solve the difficulty in detecting the liquid type or liquid concentration of the liquid in the tank in the prior art, and The detection of the liquid type or liquid concentration of the liquid in the tank used is a technical problem that is difficult to achieve.

In the first aspect, this application proposes a liquid detection device, including: a first acoustic wave detection component, a temperature detection component, a power supply component, and a controller;

The first acoustic wave detection component is used for transmitting acoustic waves at a preset distance in the liquid and receiving detection waves corresponding to the acoustic waves;

The temperature detection component is used to detect the temperature of the liquid;

The power supply component is electrically connected to the first acoustic wave detection component, the temperature detection component, and the controller;

The controller is electrically connected to the first acoustic wave detection component and the temperature detection component, and is used for receiving and transmitting the first acoustic wave according to the preset distance and the time of the first acoustic wave detection component. The detection time of the detection wave corresponding to the first sound wave is calculated to obtain the sound wave propagation speed in the liquid, and then the liquid type or liquid concentration is determined according to the sound wave propagation speed in the liquid and the liquid temperature detected by the temperature detection component.

In a second aspect, the present application also proposes a containing box with a liquid detection function, including: at least one liquid detection device according to any one of the first aspects.

In the third aspect, this application also proposes a device with a liquid detection function, comprising: at least one liquid detection device according to any one of the first aspect, or at least one container with a liquid detection function according to the second aspect box.

In the fourth aspect, the present application also proposes a liquid detection method, which is applied to the liquid detection device described in any one of the first aspect, or applied to the containment box with liquid detection function described in the second aspect, or applied to The device with liquid detection function according to any one of the third aspect;

The method includes:

Acquiring the first detection data sent by the first acoustic wave detection component, the emission time of the first acoustic wave, and the detection time of receiving the detection wave corresponding to the first acoustic wave;

Get the preset distance;

Performing propagation velocity calculation according to the first emitted sound wave time, the detection time of the detection wave corresponding to the first sound wave, and the preset distance to obtain the sound wave propagation velocity in the liquid;

Obtain the detection type and liquid temperature sent by the temperature detection component;

When the detection type is liquid type detection, a liquid type correspondence table is obtained, and the liquid type is determined according to the sound wave propagation velocity in the liquid, the liquid temperature, and the liquid type correspondence table. The liquid type correspondence table includes liquid Name, standard temperature, standard sound wave propagation speed;

When the detection type is liquid concentration detection, a liquid concentration correspondence table is obtained, and the liquid concentration is determined according to the sound wave propagation speed in the liquid, the liquid temperature, and the liquid concentration correspondence table. The liquid concentration correspondence table includes liquid Concentration, standard temperature, standard sound wave propagation speed.

In summary, the first acoustic wave detection component of the liquid detection device of the present application is used to transmit and receive sound waves corresponding to the sound waves at a preset distance in the liquid, and the temperature detection component is used to detect the temperature of the liquid, and the controller It is electrically connected to the first sound wave detection component and the temperature detection component, so as to correspond to the first sound wave according to the preset distance, the time when the first sound wave detection component emits the first sound wave, and the reception of the first sound wave The detection time of the detection wave is calculated to obtain the sound wave propagation speed in the liquid, and then the liquid type or liquid concentration is determined according to the sound wave propagation speed in the liquid and the liquid temperature detected by the temperature detection component, so that only the liquid detection device needs to be placed in the liquid , The controller can automatically detect the liquid in real time, determine the liquid type or liquid concentration in real time, and reduce the labor cost. Therefore, the liquid detection device of the present application automatically detects the liquid in real time and determines the liquid type or liquid concentration in real time, which reduces the labor cost of use.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

in:

Figure 1 is a schematic structural diagram of a liquid detection device in an embodiment;

Figure 2 is a schematic structural diagram of a liquid detection device in another embodiment;

Fig. 3 is an electrical schematic diagram of the liquid detection device of Fig. 1;

4 is a schematic diagram of a dielectric constant detection circuit of the liquid detection device of FIG. 1;

FIG. 5 is a schematic diagram of a conductivity detection circuit of the liquid detection device of FIG. 1;

Figure 6 is a schematic flow chart of a liquid detection method in an embodiment;

FIG. 7 is a schematic flowchart of a liquid detection method in another embodiment;

Fig. 8 is a schematic flow chart of a liquid detection method in another embodiment.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

As shown in Figures 1 to 5, in one embodiment, a liquid detection device is proposed, which includes: a first acoustic wave detection component 21, a temperature detection component 22, a power supply component, and a controller;

The first acoustic wave detecting component 21 is used for transmitting acoustic waves at a preset distance in the liquid 11 and receiving detection waves corresponding to the acoustic waves;

The temperature detection component 22 is used to detect the temperature of the liquid 11;

The power supply component is electrically connected to the first acoustic wave detection component 21, the temperature detection component 22, and the controller;

The controller is electrically connected to the first acoustic wave detecting component 21 and the temperature detecting component 22, so as to be used for transmitting the first acoustic wave according to the preset distance and the first acoustic wave detecting component 21. The time and the detection time of receiving the detection wave corresponding to the first sound wave are calculated to obtain the sound wave propagation speed in the liquid, and then the liquid type or liquid is determined according to the sound wave propagation speed in the liquid and the liquid temperature detected by the temperature detection component 22 concentration.

The first acoustic wave detecting component 21 of the liquid detecting device of this embodiment is used to transmit acoustic waves at a preset distance in the liquid 11 and to receive detection waves corresponding to the acoustic waves, and the temperature detecting component 22 is used to detect the temperature of the liquid 11, and the controller It is electrically connected to the first acoustic wave detection component 21 and the temperature detection component 22 for use in accordance with the preset distance, the time of transmitting the first acoustic wave of the first acoustic wave detection component 21, and receiving and receiving the first acoustic wave according to the preset distance. The detection time of the detection wave corresponding to the sound wave is calculated to obtain the sound wave propagation speed in the liquid, and then the liquid type or liquid concentration is determined according to the sound wave propagation speed in the liquid and the liquid temperature detected by the temperature detection component 22, so that only liquid detection is required. When the device is put into the liquid 11, the controller can automatically detect the liquid 11 in real time and determine the liquid type or liquid concentration in real time, which reduces the labor cost of use.

The first acoustic wave detection component 21 may select an ultrasonic transducer from the prior art, and this example is not specifically limited.

The temperature detection component 22 can select a temperature sensor from the prior art, which is not specifically limited in this example.

The controller can be an industrial computer and/or PLC (Programmable Logic Controller) and/or FPGA (Field Programmable Gate Array) and/or PC (Personal Computer) and/or Or a central processing unit and/or a single-chip microcomputer, which is not specifically limited in this example.

In one embodiment, the device further includes a dielectric constant detection component 23;

The detection end of the dielectric constant detection component 23 is located in the liquid 11 for detecting the dielectric constant of the liquid 11;

The controller is electrically connected to the dielectric constant detection component 23 for use in determining the temperature of the liquid 11 detected by the temperature detection component 22 and the dielectric constant detection component 23 based on the propagation velocity of sound waves in the liquid. The dielectric constant determines the liquid type or liquid concentration. In the liquid 11 where the sound wave propagation speed in the liquid is relatively close, the liquid type or liquid concentration cannot be determined according to the sound wave propagation speed in the liquid and the temperature of the liquid 11 detected by the temperature detection component 22. For example, in the oil, brake fluid , The sound wave propagation speed in pure water is relatively close. By adding the dielectric constant detected by the dielectric constant detection component 23, the dielectric constant can be used to determine whether the liquid 11 is oil-based or water-based, and then the liquid of the liquid 11 can be determined Type or liquid concentration.

As shown in FIG. 4, in one embodiment, the dielectric constant detection component 23 includes a dielectric constant detection circuit;

The dielectric constant detection circuit includes a first capacitor plate 231, a second capacitor plate 232, a first operational amplifier, a first capacitor C1, a second capacitor C2, a third capacitor C3, and a first reference terminal;

The first capacitive electrode plate 231 and the second capacitive electrode plate 232 are arranged without contact, so as to be placed in the liquid 11 as the detection end of the dielectric constant detection component 23;

The output terminal of the first operational amplifier and one end of the first capacitor C1 are electrically connected to the analog-to-digital conversion module of the controller;

The positive pole of the power supply of the first operational amplifier is electrically connected to the power supply component;

The inverting input terminal of the first operational amplifier is electrically connected to one end of the second capacitor C2 and the other end of the first capacitor C1;

The non-inverting input terminal of the first operational amplifier is electrically connected to one end of the first capacitor plate 231 and the third capacitor C3;

The first reference terminal is electrically connected to the negative terminal of the power supply of the first operational amplifier, the second capacitor plate 232, and the other terminal of the second capacitor C2;

The other end of the third capacitor C3 is electrically connected to the digital-to-analog conversion module of the controller.

The first operational amplifier can be an operational amplifier selected from the prior art, which will not be repeated here.

The non-contact configuration includes parallel configuration, facing configuration, angled configuration and non-contact configuration, which is not specifically limited in this example.

In one embodiment, the size of the first capacitor plate 231 and the second capacitor plate 232 are the same.

The calculation formula of the capacitance Cdj formed between the first capacitor plate 231 and the second capacitor plate 232 is as follows:

Among them, ε refers to the dielectric constant between the first capacitor plate 231 and the second capacitor plate 232, Sdj refers to the area facing the first capacitor plate 231 and the second capacitor plate 232, which means that Ddj is Refers to the distance between the first capacitor plate 231 and the second capacitor plate 232.

It is understandable that those skilled in the art can determine the voltage output by the dielectric constant detection circuit and the relevant parameters of the dielectric constant detection circuit to obtain the first capacitor plate 231 and the second capacitor plate 231 from the prior art. The calculation formula of the capacitance Cdj formed between the capacitor plates 232 will not be repeated here.

The first capacitor plate 231 and the second capacitor plate 232 can be made of 316L stainless steel material from the prior art to improve the anti-corrosion ability of the first capacitor plate 231 and the second capacitor plate 232 and prolong the service life of the device. It can be understood that the first capacitor plate 231 and the second capacitor plate 232 can also be made of other materials, which are not specifically limited in this example.

In an embodiment, the capacity of the second capacitor C2 is 0, so that the amplification factor of the first operational amplifier is close to 1.

In an embodiment, the device further includes a conductivity detection component;

The detection end of the conductivity detection component is located in the liquid 11 for detecting the conductivity of the liquid 11;

The controller is electrically connected to the conductivity detection component for use in accordance with the propagation speed of sound waves in the liquid, the temperature of the liquid 11 detected by the temperature detection component 22, and the dielectric constant detected by the dielectric constant detection component 23. The constant, the conductivity detected by the conductivity detection component, determine the type of liquid or the concentration of the liquid. In the liquid 11 where the sound wave propagation velocity in the liquid is relatively close and the liquid 11 is in an electrostatic field, the dielectric constant of the liquid 11 is equivalent to infinity. At this time, the liquid type or liquid concentration of the liquid 11 cannot be determined by the dielectric constant of the liquid 11. By adding the conductivity detected by the conductivity detecting component, it is distinguished whether the liquid 11 is a conductive liquid 11 or a non-conductive liquid 11, and then the liquid type or liquid concentration of the liquid 11 can be determined.

As shown in FIG. 5, in one embodiment, the conductivity detection component includes a conductivity detection circuit 24;

The conductivity detection circuit 24 includes a first detection plate 241, a second detection plate 242, a second operational amplifier, a first resistor R1, a second resistor R2, and a second reference terminal;

The first detection electrode plate 241 and the second detection electrode plate 242 are not in contact with each other, so as to be placed in the liquid 11 as the detection end of the conductivity detection component;

The output terminal of the second operational amplifier and one end of the first resistor R1 are electrically connected to the analog-to-digital conversion module of the controller;

The positive pole of the power supply of the second operational amplifier is electrically connected to the power supply component;

The inverting input end of the second operational amplifier is electrically connected to the other end of the first resistor R1 and the first detection plate 241;

The non-inverting input end of the second operational amplifier is electrically connected to one end of the second resistor R2 and the digital-to-analog conversion module of the controller;

The second reference terminal is electrically connected to the negative terminal of the power supply of the second operational amplifier, the second detection plate 242, and the other end of the second resistor R2.

The second operational amplifier can be an operational amplifier selected from the prior art, which will not be repeated here.

The calculation formula of the output voltage Vout of the second operational amplifier (that is, the voltage of the analog-to-digital conversion module of the controller input from the output terminal of the second operational amplifier) is as follows:

Among them, R1 is the first resistance R1, R3 is the resistance between the first detection plate 241 and the second detection plate 242, and Vref is the non-inverting input of the digital-to-analog conversion module of the controller to the second operational amplifier. Terminal input reference voltage.

The first detection electrode plate 241 and the second detection electrode plate 242 can be made of 316L stainless steel material from the prior art, which improves the anticorrosion ability of the first detection electrode plate 241 and the second detection electrode plate 242 and prolongs the service life of the device. It can be understood that the first detection electrode plate 241 and the second detection electrode plate 242 can also be selected from other materials, which are not specifically limited in this example.

In one embodiment, the analog-to-digital conversion module of the controller adopts at least 10-bit analog-to-digital conversion, thereby helping to improve the accuracy of detection.

In one embodiment, the analog-to-digital conversion module of the controller adopts 12-bit analog-to-digital conversion.

In one embodiment, the digital-to-analog conversion module of the controller adopts at least 5 digital-to-analog conversion, so as to improve the resolution of detection.

In one embodiment, the digital-to-analog conversion module of the controller adopts 10-digit-to-analog conversion.

In an embodiment, the first reference terminal and the second reference terminal share a common ground terminal as a reference terminal.

In one embodiment, the digital-to-analog conversion module of the controller inputs a small high-frequency AC signal to the dielectric constant detection circuit;

The digital-to-analog conversion module of the controller inputs a small high-frequency AC signal to the conductivity detection circuit 24. The high-frequency AC small signal can prevent the first capacitor plate 231, the second capacitor plate 232, the first detection plate 241, and the second detection plate 242 from being polarized and corroded and polluting the liquid 11. Service life.

In one embodiment, the digital-to-analog conversion module of the controller inputs a high frequency AC small signal with a frequency of 100KHZ and a voltage peak of 5V to the dielectric constant detection circuit, which is not specifically limited in this example.

In an embodiment, the digital-to-analog conversion module of the controller inputs a high frequency AC small signal with a frequency of 100 KHZ and a voltage peak value of less than 1V to the conductivity detection circuit 24, which is not specifically limited in this example.

In one embodiment, the detection end of the dielectric constant detection component 23 and the detection end of the conductivity detection component time-division multiplex the same detection end, or the detection end of the dielectric constant detection component 23 and the The detection end of the conductivity detection component adopts an independent detection end. Therefore, the parts are reduced and the manufacturing cost of the device is saved.

It can be understood that the controller controls the detection terminal of the dielectric constant detection component 23 and the detection terminal of the conductivity detection component to time-division multiplex the same detection terminal, which will not be repeated here.

In one embodiment, the device further includes a housing provided with a receiving cavity;

The detection end of the dielectric constant detection component 23 and the detection end of the conductivity detection component are directly placed in the liquid 11;

The first acoustic wave detection component 21, the temperature detection component 22, the power supply component, the controller, other components of the dielectric constant detection component 23, and other components of the conductivity detection component Sealed in the receiving cavity of the shell. By being sealed in the housing cavity of the housing, the corrosion of the components of the device by the liquid 11 is avoided, the detection accuracy of the device is ensured, the service life of the device is prolonged, and the liquid 11 is prevented from being polluted by corrosion of the device.

The shell can be made of corrosion-resistant and oil-resistant materials, and sealed with potting glue, which is not specifically limited in this example.

In one embodiment, a thermally conductive isolation sleeve is provided outside the detection end of the temperature detection component 22, so as to prevent the liquid 11 from corroding the detection end of the temperature detection component 22, and ensure that the temperature detection component 22 measures the liquid 11 The accuracy of temperature.

In one embodiment, the first acoustic wave detecting component 21 includes a first acoustic wave transmitting end and a first acoustic wave receiving end;

The controller is electrically connected to the first acoustic wave transmitting terminal and the first acoustic wave receiving terminal;

Wherein, the first sound wave transmitting end transmits sound waves toward the first sound wave receiving end and the first sound wave receiving end directly receives the sound waves, or the first sound wave transmitting end transmits sound waves toward a fixed object And the first acoustic wave receiving end receives the echo corresponding to the acoustic wave reflected by the fixed object.

In one embodiment, a thermally conductive isolation sleeve is provided outside the first acoustic wave emitting end and the first acoustic wave receiving end, so as to prevent the liquid 11 from causing the first acoustic wave emitting end and the first acoustic wave receiving end to cause damage. Corrosion ensures the accuracy of the detection of the first acoustic wave detection component 21 and prolongs the service life of the device.

In one embodiment, the first acoustic wave detection component 21 further includes an ultrasonic processing circuit and an ultrasonic transducer; the ultrasonic processing circuit is used to receive the ultrasonic driving electric signal sent by the controller, and according to the ultrasonic driving After signal conversion, the electrical signal is sent to the ultrasonic transducer and at the same time an ultrasonic transmission electrical signal is sent to the controller, and the ultrasonic echo electrical signal sent by the ultrasonic transducer is received, according to the ultrasonic echo The electrical signal is converted and sent to the controller; the ultrasonic transducer is used to convert the ultrasonic drive electrical signal to obtain ultrasonic waves, send ultrasonic waves according to a preset direction, receive ultrasonic echoes corresponding to the transmitted ultrasonic waves, and convert The ultrasonic echo corresponding to the transmitted ultrasonic wave is converted into an ultrasonic echo electric signal. It can be understood that the first acoustic wave transmitting end and the first acoustic wave receiving end are electrically connected to the ultrasonic transducer.

In one embodiment, the fixed object includes any one of the tank 10 containing the liquid 11 and the acoustic wave reflecting plate 211.

The acoustic wave reflecting plate 211 can be made of 316L stainless steel material selected from the prior art, which is not specifically limited in this example.

In an embodiment, the device further includes a second acoustic wave detecting component 25;

The second acoustic wave detecting component 25 includes a second acoustic wave transmitting end and at least one second acoustic wave receiving end;

The second sound wave emitting end is installed in the liquid 11 and located in the liquid 11, and is used to emit sound waves to the liquid surface 111 of the liquid 11;

All the second acoustic wave receiving ends are located in the liquid 11, and are used to receive echoes reflected by the liquid surface 111 of the liquid 11;

The controller is electrically connected to the second acoustic wave transmitting terminal and the second acoustic wave receiving terminal, and is used for transmitting the second acoustic wave according to the propagation velocity of the acoustic wave in the liquid and the time when the second acoustic wave detecting component 25 emits the second acoustic wave. And the detection time of receiving the detection wave corresponding to the second sound wave determines the height of the liquid.

The second acoustic wave detecting component 25 can select an ultrasonic transducer from the prior art, and this example is not specifically limited.

In one embodiment, a thermally conductive isolation sleeve is provided outside the second acoustic wave emitting end and the second acoustic wave receiving end, so as to prevent the liquid 11 from corroding the second acoustic wave emitting end and the second acoustic wave receiving end, and ensure The detection accuracy of the second acoustic wave detection component 25 prolongs the service life of the device.

In an embodiment, the device further includes a filter tube 251 for isolating the fluctuation of the liquid level 111;

One end of the filter tube 251 is installed in the liquid 11, and is sleeved on the outer periphery of the second sound wave emitting end and at least one of the second sound wave receiving ends;

Wherein, the side wall of the filter tube 251 close to the second acoustic wave emitting end is provided with at least one through hole 252, and the end of the filter tube 251 far away from the second acoustic wave emitting end is provided with at least one through hole 252. By providing the through hole 252, when the liquid level 111 of the liquid 11 fluctuates greatly, the liquid level 111 in the filter tube 251 is affected by the wall of the filter tube 251 to reduce the fluctuation of the liquid level 111 in the filter tube 251, thereby The detection accuracy of the second acoustic wave detection component 25 is ensured; and the tube wall of the filter tube 251 can reduce bubbles on the liquid surface 111 in the filter tube 251, thereby avoiding the direction of the echo reflected on the liquid surface 111 of the liquid 11 Therefore, the accuracy of detection by the second acoustic wave detection component 25 is further ensured.

In one embodiment, the first acoustic wave detecting component 21 and the second acoustic wave detecting component 25 may adopt independent ultrasonic processing circuits; the first acoustic wave detecting component 21 and the second acoustic wave detecting component 25 may also share the same An ultrasonic processing circuit is not specifically limited in this example.

In an embodiment, the height of the filter tube is equal to the highest height of the liquid 11.

In an embodiment, the number of the second acoustic wave receiving ends is multiple;

All the second acoustic wave receiving ends are located on the same plane, and are symmetrically arranged with the central axis of the second acoustic wave emitting end emitting the acoustic waves as the center. By providing multiple second acoustic wave receiving ends, when the liquid level 111 is fluctuated, it can be ensured that the echo reflected by the liquid level 111 of the liquid 11 can be received by one of the second acoustic wave receiving ends, thereby ensuring The stability of the operation of the second acoustic wave detection component 25 is improved.

In an embodiment, the device further includes a body sensing measuring component for measuring the posture of the tank 10 containing the liquid 11;

The controller is electrically connected with the somatosensory measurement component. The posture of the tank 10 containing the liquid 11 is measured by the somatosensory measurement component, thereby avoiding false alarms of the liquid detection device, and further improving the accuracy of the liquid detection device.

The somatosensory measuring component can select a somatosensory measuring sensor from the prior art, which is not specifically limited in this example.

As shown in Figure 3, the power supply component includes a power supply protection circuit and a power supply voltage stabilizing circuit, and the power supply protection circuit is electrically connected to the input end of the power supply voltage stabilizing circuit. The liquid detection device supplies power to the power supply part through a battery or an AC power source. The circuit protection circuit is used to protect at least one of overvoltage, reverse connection, overcurrent, lightning strike, surge, and static electricity input to the power supply component. Therefore, it is avoided that some unstable factors in the circuit of the power input to the power supply component cause unstable operation or even damage of the liquid detection device. The circuit protection circuit can select an integrated circuit capable of realizing corresponding functions from the prior art, which will not be repeated here.

The power supply voltage stabilizing circuit is used to perform voltage reduction and voltage stabilization processing according to the AC power supply to enable the power supply component to output a stable working voltage. The voltage is reduced and stabilized by the power supply voltage stabilizer circuit before supplying power to other parts of the liquid detection device to avoid excessive voltage of the AC power supply from damaging the circuit of the liquid detection device, and to avoid unstable operation of the liquid detection device due to unstable AC power supply Even damaged. The power supply voltage stabilizing circuit can select an integrated circuit capable of realizing corresponding functions from the prior art, which will not be repeated here.

In one embodiment, the number of the temperature detection component 22 is multiple, and it can be located at at least one of the bottom, middle, side walls, and top of the tank 10 containing the liquid 11, so that when the liquid detection device is turned over , The temperature detecting component 22 is always located in the liquid 11, so that the temperature of the liquid 11 can be accurately detected.

In one embodiment, the number of the first acoustic wave detection component 21 is multiple, which can be located at least one of the bottom, middle, side walls, and top of the tank 10 containing the liquid 11, so that the liquid detection device When being turned over, the first acoustic wave detecting component 21 is always located in the liquid 11, so that the height of the liquid 11 can be accurately detected.

In one embodiment, the number of the second acoustic wave detection component 25 is multiple, which can be located at least one of the bottom, middle, side walls, and top of the tank 10 containing the liquid 11, so that the liquid detection device is When turning over, the second acoustic wave detecting component 25 is always located in the liquid 11, so that the acoustic wave can be emitted in the liquid 11 at a preset distance and the detection wave corresponding to the acoustic wave can be received.

In one embodiment, the number of the dielectric constant detection components 23 is multiple, which can be located at at least one of the bottom, middle, side walls, and top of the tank 10 containing the liquid 11, so that the liquid detection device is When turning over, the dielectric constant detection component 23 is always located in the liquid 11, so that the dielectric constant of the liquid 11 can be accurately detected.

In an embodiment, the number of the conductivity detection components is multiple, which may be located at at least one of the bottom, middle, side walls, and top of the tank 10 containing the liquid 11, so that when the liquid detection device is turned over , The conductivity detection component is always located in the liquid 11, so that the conductivity of the liquid 11 can be accurately detected.

In one embodiment, a containment box with a liquid 11 detection function is proposed, which includes: at least one liquid detection device as described in any one of the above, and the liquid detection device includes: a first acoustic wave detection component 21, a temperature A detection component 22, a power supply component, and a controller. The first acoustic wave detection component 21 is used to transmit and receive a detection wave corresponding to the sound wave at a preset distance in the liquid 11, and the temperature detection component 22 is used to To detect the temperature of the liquid 11, the power supply component is electrically connected to the first acoustic wave detecting component 21, the temperature detecting component 22, and the controller, and the controller is electrically connected to the first acoustic wave detecting component 21. The temperature detection component 22 is electrically connected for use in accordance with the preset distance, the time when the first sound wave detection component 21 emits the first sound wave, and receives detection corresponding to the first sound wave The wave detection time is calculated to obtain the sound wave propagation speed in the liquid, and then the liquid type or liquid concentration is determined according to the sound wave propagation speed in the liquid and the liquid temperature detected by the temperature detection component 22.

The containment tank with the liquid 11 detection function includes a fuel tank, a coolant tank, a urea tank, a water tank, and an oil tank, which are not specifically limited in this example.

In one embodiment, a device with a liquid 11 detection function is proposed, which includes: at least one of the liquid detection devices described in any one of the above, or at least one of the above-mentioned containment boxes with a liquid 11 detection function;

The liquid detection device includes: a first sound wave detection component 21, a temperature detection component 22, a power supply component, and a controller. The first sound wave detection component 21 is used to transmit sound waves at a preset distance in the liquid 11 and receive and The detection wave corresponding to the sound wave, the temperature detection component 22 is used to detect the temperature of the liquid 11, the power supply component is related to the first sound wave detection component 21, the temperature detection component 22, and the controller The controller is electrically connected to the first acoustic wave detecting component 21 and the temperature detecting component 22 for the first acoustic wave detecting component 21 according to the preset distance. The sound wave time and the detection time of receiving the detection wave corresponding to the first sound wave are calculated to obtain the sound wave propagation speed in the liquid, and then the liquid is determined based on the sound wave propagation speed in the liquid and the liquid temperature detected by the temperature detection component 22 Type or liquid concentration.

The first acoustic wave detecting component 21 of the liquid detecting device of the device with the liquid 11 detecting function of this embodiment is used for transmitting acoustic waves at a preset distance in the liquid 11 and receiving detection waves corresponding to the acoustic waves, and the temperature detecting component 22 is used for The temperature of the liquid 11 is detected, and the controller is electrically connected to the first acoustic wave detecting component 21 and the temperature detecting component 22, so as to be used for transmitting the first acoustic wave according to the preset distance and the first acoustic wave detecting component 21. The time and the detection time of receiving the detection wave corresponding to the first sound wave are calculated to obtain the sound wave propagation speed in the liquid, and then the liquid type or liquid is determined according to the sound wave propagation speed in the liquid and the liquid temperature detected by the temperature detection component 22 Therefore, it is only necessary to put the liquid detection device into the liquid 11, and the controller can automatically detect the liquid 11 in real time, determine the liquid type or liquid concentration in real time, and reduce the labor cost.

The equipment with the liquid 11 detection function includes automobiles, ships, trucks, trains, and airplanes, which are not specifically limited in this example.

In an embodiment, the device further includes a tank body 10;

The tank body 10 is provided with a containing cavity for containing a liquid 11;

There are multiple liquid detection devices, and all the liquid detection devices are located at the bottom of the tank body 10;

Wherein, all the liquid detection devices are symmetrically arranged with the central axis of the containing cavity as the center. With the liquid detection device, it can be ensured that the liquid detection device can always accurately detect the liquid 11 when the device is shaken.

It is understandable that the liquid detection device can also be installed in other positions of the tank body 10, such as the side wall of the tank body 10 and a bracket placed in the tank body 10, which is not specifically limited in this example.

As shown in FIG. 6, in one embodiment, a liquid detection method is proposed, which is applied to any of the above-mentioned liquid detection devices, or applied to the above-mentioned containing box with liquid detection function, or application Any of the above-mentioned equipment with liquid detection function;

The liquid detection device includes: a first sound wave detection component, a temperature detection component, a power supply component, and a controller. The first sound wave detection component is used to transmit sound waves at a preset distance in the liquid and receive sound waves corresponding to the sound waves. The temperature detection component is used to detect the temperature of the liquid, the power supply component is electrically connected to the first acoustic wave detection component, the temperature detection component, and the controller, and the controller is electrically connected to the The first acoustic wave detection component and the temperature detection component are electrically connected for use in accordance with the preset distance, the time of transmitting the first acoustic wave of the first acoustic wave detection component, and the receiving and the first acoustic wave. The detection time of the detection wave corresponding to the sound wave is calculated to obtain the sound wave propagation speed in the liquid, and then the liquid type or liquid concentration is determined according to the sound wave propagation speed in the liquid and the liquid temperature detected by the temperature detection component;

The method includes:

S602. Acquire the first detection data sent by the first acoustic wave detection component, the transmission time of the first acoustic wave, and the detection time of receiving the detection wave corresponding to the first acoustic wave.

Specifically, the controller acquires the first detection data sent by the first acoustic wave detection component.

Wherein, the first sound wave detection component may send sound waves at a preset time interval, or may send sound waves according to a signal from the controller.

Optionally, the first acoustic wave detection component emits ultrasonic waves at a preset distance in the liquid.

S604: Obtain a preset distance;

The first acoustic wave detecting component includes a first acoustic wave emitting end and a first acoustic wave receiving end. When the first acoustic wave emitting end emits an acoustic wave toward the first acoustic wave receiving end and the first acoustic wave When the receiving end directly receives the sound wave, the preset distance is the distance from the first sound wave emitting end to the first sound wave receiving end; when the first sound wave emitting end emits sound waves toward a fixed object and the first sound wave When the acoustic wave receiving end receives the echo corresponding to the acoustic wave reflected by the fixed object, the distance from the first acoustic wave transmitting end to the fixed object is added to the distance from the fixed object to the first acoustic wave receiving end to obtain Preset distance.

S606. Perform propagation velocity calculation according to the first emitted acoustic wave time, the detection time of the detection wave corresponding to the first acoustic wave, and the preset distance to obtain the acoustic wave propagation velocity in the liquid;

The formula for calculating the propagation velocity C of sound waves in liquid is:

Among them, d refers to the preset distance, h is the first sound wave emission time, and t is the first detection wave time corresponding to the first sound wave emission time.

S608: Obtain the detection type and the liquid temperature sent by the temperature detection component;

Specifically, the controller obtains the detection type; the controller obtains the liquid temperature sent by the temperature detection component. It is understandable that the acquisition of the detection type and the acquisition of the liquid temperature sent by the temperature detection component can be acquired at the same time or at different times, and there is no specific limitation here.

The detection types include liquid type detection and liquid concentration detection.

S610. When the detection type is liquid type detection, obtain a liquid type correspondence table, and determine the liquid type according to the sound wave propagation velocity in the liquid, the liquid temperature, and the liquid type correspondence table, and the liquid type correspondence table Including liquid name, standard temperature, standard sound wave propagation speed;

Specifically, when the detection type is liquid type detection, the controller obtains the liquid type correspondence table, and searches the liquid type correspondence table according to the sound wave propagation velocity in the liquid and the liquid temperature, and the matching is obtained Liquid type.

S612. When the detection type is liquid concentration detection, obtain a liquid concentration correspondence table, and determine the liquid concentration according to the sound wave propagation velocity in the liquid, the liquid temperature, and the liquid concentration correspondence table, and the liquid concentration correspondence table Including liquid concentration, standard temperature, standard sound wave propagation speed.

Specifically, when the detection type is liquid type detection, the controller obtains the liquid concentration correspondence table, searches in the liquid concentration correspondence table according to the sound wave propagation velocity in the liquid and the liquid temperature, and obtains the matching Liquid concentration.

The first sound wave detection component of the liquid detection device applied by the method of this embodiment is used to transmit sound waves and receive detection waves corresponding to the sound waves at a preset distance in the liquid. The temperature detection component is used to detect the temperature of the liquid, and the controller and The first acoustic wave detection component and the temperature detection component are electrically connected for use in accordance with the preset distance, the time when the first acoustic wave detection component emits the first acoustic wave, and the receiving of the first acoustic wave corresponding to the first acoustic wave. The detection time of the detection wave is calculated to obtain the sound wave propagation speed in the liquid, and then the liquid type or liquid concentration is determined according to the sound wave propagation speed in the liquid and the liquid temperature detected by the temperature detection component, so that only the liquid detection device needs to be placed in the liquid , The controller can automatically detect the liquid in real time and determine the liquid type or liquid concentration in real time, which reduces the labor cost.

As shown in FIG. 7, in one embodiment, a liquid detection method is also proposed, which is applied to the liquid detection device described in any one of the above, or applied to the device with liquid detection function described in any one of the above ；

The method includes:

S702. Acquire first detection data sent by the first sound wave detection component, the first sound wave emission time, and the detection time when the detection wave corresponding to the first sound wave is received.

S704: Obtain a preset distance;

S706: Perform a propagation velocity calculation according to the first emitted acoustic wave time, the detection time of the detection wave corresponding to the first acoustic wave, and the preset distance to obtain the acoustic wave propagation velocity in the liquid;

S708: Obtain the detection type and the liquid temperature sent by the temperature detection component;

S710. Acquire second detection data sent by the dielectric constant detection component;

The second detection data includes the output voltage of the dielectric constant detection part.

S712: Perform dielectric constant calculation according to the second detection data to obtain the dielectric constant of the liquid;

Wherein, the controller obtains the dielectric constant correspondence table, searches the dielectric constant correspondence table according to the second detection data, and obtains the liquid dielectric constant through matching. In another embodiment, the controller calculates the dielectric constant of the relevant parameters of the dielectric constant detection component based on the second detection data to obtain the dielectric constant of the liquid.

The dielectric constant correspondence table includes the output voltage of the registered dielectric constant detection component and the standard dielectric constant, which can be measured and calculated according to the relevant parameters of the dielectric constant detection component.

The relevant parameters of the dielectric constant detection component include the facing area of the first capacitor plate and the second capacitor plate, the distance between the first capacitor plate and the second capacitor plate, the specifications of the first operational amplifier, The capacity of the first capacitor, the capacity of the second capacitor, and the capacity of the third capacitor are not specifically limited in this example.

S714. When the detection type is liquid type detection, obtain a liquid type correspondence table, and determine the liquid type according to the sound wave propagation velocity in the liquid, the liquid temperature, the dielectric constant of the liquid, and the liquid type correspondence table. ；

Specifically, the controller searches the liquid type correspondence table according to the sound wave propagation velocity in the liquid, the liquid temperature, and the liquid dielectric constant to obtain the liquid type by matching, and the liquid type correspondence table includes the liquid name , Standard temperature, standard sound wave propagation speed, standard dielectric constant.

S716. When the detection type is liquid concentration detection, obtain a liquid concentration correspondence table, and determine the liquid concentration according to the sound wave propagation velocity in the liquid, the liquid temperature, the liquid dielectric constant, and the liquid concentration correspondence table. .

Specifically, the controller searches the liquid concentration correspondence table according to the sound wave propagation speed in the liquid, the liquid temperature, and the liquid dielectric constant, and matches to obtain the liquid concentration. The liquid concentration correspondence table includes the liquid concentration. , Standard temperature, standard sound wave propagation speed, standard dielectric constant.

In this embodiment, in a liquid with a relatively close sound wave propagation speed in the liquid, the liquid type or liquid concentration cannot be determined according to the sound wave propagation speed in the liquid and the liquid temperature detected by the temperature detection component, for example, in oil, brake fluid , The sound wave propagation speed in pure water is relatively close. By adding the dielectric constant detected by the dielectric constant detection component, the dielectric constant can be used to determine whether the liquid is oil-based or water-based, and then the liquid type or liquid of the liquid can be determined concentration.

As shown in FIG. 8, in an embodiment, a liquid detection method is also proposed, which is applied to the liquid detection device described in any one of the above, or applied to the device with a liquid detection function described in any one of the above ；

The method includes:

S802. Acquire the first detection data sent by the first acoustic wave detection component, the transmission time of the first acoustic wave, and the detection time of receiving the detection wave corresponding to the first acoustic wave.

S804: Obtain a preset distance;

S806: Perform a propagation velocity calculation according to the first emitted acoustic wave time, the detection time of the detection wave corresponding to the first acoustic wave, and the preset distance to obtain the acoustic wave propagation velocity in the liquid;

S808: Obtain the detection type and the liquid temperature sent by the temperature detection component;

S810: Acquire second detection data sent by the dielectric constant detection component;

S812: Perform dielectric constant calculation according to the second detection data to obtain the dielectric constant of the liquid;

S814. Obtain third detection data sent by the conductivity detection component.

The third detection data includes the output voltage of the conductivity detection component.

S816: Perform conductivity calculation according to the third detection data to obtain the conductivity of the liquid.

Wherein, the controller obtains the conductivity correspondence table, searches the conductivity correspondence table according to the third detection data, and obtains the liquid conductivity by matching. In another embodiment, the controller calculates the conductivity of the relevant parameters of the conductivity detection component based on the third detection data to obtain the conductivity of the liquid.

The conductivity correspondence table includes the output voltage of the registered conductivity detection component and the standard conductivity, which can be obtained by measurement and calculation according to the relevant parameters of the conductivity detection component.

The relevant parameters of the conductivity detection component include the reference voltage input by the digital-to-analog conversion module of the controller to the non-inverting input terminal of the second operational amplifier, the resistance value of the first resistor, the specifications of the second operational amplifier, and the second operational amplifier. The resistance value of the second resistor is not specifically limited in this example.

S818. When the detection type is liquid type detection, obtain a liquid type correspondence table, according to the sound wave propagation velocity in the liquid, the liquid temperature, the dielectric constant of the liquid, the conductivity of the liquid, and the liquid Type correspondence table to determine the type of liquid;

Specifically, the controller searches the liquid type correspondence table according to the sound wave propagation velocity in the liquid, the liquid temperature, the dielectric constant of the liquid, and the liquid conductivity to obtain the liquid type by matching. The type correspondence table includes liquid name, standard temperature, standard sound wave propagation speed, standard dielectric constant, and conductivity of the liquid.

S820. When the detection type is liquid concentration detection, obtain a liquid concentration correspondence table based on the propagation velocity of sound waves in the liquid, the liquid temperature, the dielectric constant of the liquid, the conductivity of the liquid, and the liquid The concentration correspondence table determines the liquid concentration.

Specifically, the controller searches the liquid concentration correspondence table according to the sound wave propagation velocity in the liquid, the liquid temperature, the dielectric constant of the liquid, and the liquid conductivity to obtain the liquid concentration by matching. The concentration correspondence table includes liquid concentration, standard temperature, standard acoustic wave propagation speed, standard dielectric constant, and conductivity of the liquid.

In this embodiment, when the sound wave propagation velocity in the liquid is relatively close and the liquid is in an electrostatic field, the dielectric constant of the liquid is equivalent to infinity. At this time, the liquid type or liquid concentration of the liquid cannot be determined by the dielectric constant of the liquid. The conductivity detected by the conductivity detection component can distinguish whether the liquid is a conductive liquid or a non-conductive liquid, and then the liquid type or liquid concentration of the liquid can be determined.

It should be noted that the above-mentioned liquid detection device, a containing box with a liquid detection function, a device with a liquid detection function, and a liquid detection method belong to a general inventive concept. The contents in the embodiments of a device with a liquid detection function and a liquid detection method are mutually applicable.

The above-disclosed are only preferred embodiments of this application, and of course the scope of rights of this application cannot be limited by this. Therefore, equivalent changes made according to the claims of this application still fall within the scope of this application.

Claims

A liquid detection device, characterized by comprising: a first acoustic wave detection component, a temperature detection component, a power supply component, and a controller;

The first acoustic wave detection component is used for transmitting acoustic waves at a preset distance in the liquid and receiving detection waves corresponding to the acoustic waves;

The temperature detection component is used to detect the temperature of the liquid;

The power supply component is electrically connected to the first acoustic wave detection component, the temperature detection component, and the controller;

The controller is electrically connected to the first acoustic wave detection component and the temperature detection component, and is used for receiving and transmitting the first acoustic wave according to the preset distance and the time of the first acoustic wave detection component. The detection time of the detection wave corresponding to the first sound wave is calculated to obtain the sound wave propagation speed in the liquid, and then the liquid type or liquid concentration is determined according to the sound wave propagation speed in the liquid and the liquid temperature detected by the temperature detection component.
3. The liquid detection device according to claim 1, wherein the device further comprises a dielectric constant detection component;

The detection end of the dielectric constant detection component is located in the liquid for detecting the dielectric constant of the liquid;

The controller is electrically connected to the dielectric constant detection component, for determining according to the sound wave propagation velocity in the liquid, the liquid temperature detected by the temperature detection component, and the dielectric constant detected by the dielectric constant detection component Liquid type or liquid concentration.
3. The liquid detection device according to claim 2, wherein the dielectric constant detection component comprises a dielectric constant detection circuit;

The dielectric constant detection circuit includes a first capacitor plate, a second capacitor plate, a first operational amplifier, a first capacitor, a second capacitor, a third capacitor, and a first reference terminal;

The first capacitor plate and the second capacitor plate are arranged in a non-contact manner, so as to be placed in a liquid as the detection end of the dielectric constant detection component;

The output terminal of the first operational amplifier and one end of the first capacitor are electrically connected to the analog-to-digital conversion module of the controller;

The positive pole of the power supply of the first operational amplifier is electrically connected to the power supply component;

The inverting input terminal of the first operational amplifier is electrically connected to one end of the second capacitor and the other end of the first capacitor;

The non-inverting input end of the first operational amplifier is electrically connected to one end of the first capacitor plate and the third capacitor;

The first reference terminal is electrically connected to the negative terminal of the power supply of the first operational amplifier, the second capacitor plate, and the other terminal of the second capacitor;

The other end of the third capacitor is electrically connected to the digital-to-analog conversion module of the controller.
3. The liquid detection device according to claim 2, wherein the device further comprises a conductivity detection component;

The detection end of the conductivity detection component is located in the liquid for detecting the conductivity of the liquid;

The controller is electrically connected to the conductivity detection component for use in accordance with the propagation velocity of sound waves in the liquid, the liquid temperature detected by the temperature detection component, the dielectric constant detected by the dielectric constant detection component, and the The conductivity detected by the conductivity detection component determines the type of liquid or the concentration of the liquid.
5. The liquid detection device according to claim 4, wherein the conductivity detection component comprises a conductivity detection circuit;

The conductivity detection circuit includes a first detection plate, a second detection plate, a second operational amplifier, a first resistor, a second resistor, and a second reference terminal;

The first detection electrode plate and the second detection electrode plate are arranged in a non-contact manner, so as to be placed in a liquid as the detection end of the conductivity detection component;

The output terminal of the second operational amplifier and one end of the first resistor are electrically connected to the analog-to-digital conversion module of the controller;

The positive pole of the power supply of the second operational amplifier is electrically connected to the power supply component;

The inverting input end of the second operational amplifier is electrically connected to the other end of the first resistor and the first detection plate;

The non-inverting input end of the second operational amplifier is electrically connected to one end of the second resistor and the digital-to-analog conversion module of the controller;

The second reference terminal is electrically connected to the negative terminal of the power supply of the second operational amplifier, the second detection plate, and the other end of the second resistor.
5. The liquid detection device according to claim 4, wherein the digital-to-analog conversion module of the controller inputs a small high-frequency alternating current signal to the dielectric constant detection circuit;

The digital-to-analog conversion module of the controller inputs a small high-frequency alternating current signal to the conductivity detection circuit.
The liquid detection device according to claim 4, wherein the detection end of the dielectric constant detection component and the detection end of the conductivity detection component time-division multiplex the same detection end, or the dielectric constant detection The detection end of the component and the detection end of the conductivity detection component adopt independent detection ends.
5. The liquid detection device according to claim 4, wherein the device further comprises a housing provided with a receiving cavity;

The detection end of the dielectric constant detection component and the detection end of the conductivity detection component are directly placed in the liquid;

The first acoustic wave detection component, the temperature detection component, the power supply component, the controller, other components of the dielectric constant detection component, and other components of the conductivity detection component are sealed in all The housing cavity of the housing.
3. The liquid detection device according to claim 1, wherein the first acoustic wave detection component comprises a first acoustic wave transmitting end and a first acoustic wave receiving end;

The controller is electrically connected to the first acoustic wave transmitting terminal and the first acoustic wave receiving terminal;

Wherein, the first sound wave transmitting end transmits sound waves toward the first sound wave receiving end and the first sound wave receiving end directly receives the sound waves, or the first sound wave transmitting end transmits sound waves toward a fixed object And the first acoustic wave receiving end receives the echo corresponding to the acoustic wave reflected by the fixed object.
9. The liquid detection device according to claim 9, wherein the fixed object includes any one of a tank containing a liquid and an acoustic wave reflector.
The liquid detection device according to any one of claims 1 to 10, wherein the device further comprises a second acoustic wave detection component;

The second acoustic wave detecting component includes a second acoustic wave transmitting end and at least one second acoustic wave receiving end;

The second sound wave emitting end is installed in the liquid and located in the liquid, and is used to emit sound waves to the liquid surface of the liquid;

All the second acoustic wave receiving ends are located in the liquid, and are used to receive echoes reflected by the liquid surface of the liquid;

The controller is electrically connected to the second acoustic wave transmitting end and the second acoustic wave receiving end, and is used for transmitting the second acoustic wave according to the propagation velocity of the acoustic wave in the liquid, the time and time when the second acoustic wave detecting component emits the second acoustic wave The detection time of receiving the detection wave corresponding to the second sound wave determines the height of the liquid.
11. The liquid detection device according to claim 11, wherein the device further comprises a filter tube for isolating liquid level fluctuations;

One end of the filter tube is installed in the liquid, and is sleeved on the outer periphery of the second acoustic wave transmitting end and at least one of the second acoustic wave receiving ends;

Wherein, the side wall of the end of the filter tube close to the second acoustic wave emitting end is provided with at least one through hole, and the end of the filter tube away from the second acoustic wave emitting end is provided with at least one through hole.
The liquid detection device according to claim 11, wherein the number of the second acoustic wave receiving ends is multiple;

All the second acoustic wave receiving ends are located on the same plane, and are symmetrically arranged with the central axis of the second acoustic wave emitting end emitting the acoustic waves as the center.
8. The liquid detection device according to any one of claims 1 to 10, wherein the device further comprises a somatosensory measuring component for measuring the posture of the tank containing the liquid;

The controller is electrically connected with the somatosensory measurement component.
A containing box with liquid detection function, characterized by comprising: at least one liquid detection device according to any one of claims 1 to 14.
A device with liquid detection function, characterized by comprising: at least one liquid detection device according to any one of claims 1 to 14, or at least one containing box with liquid detection function according to claim 15 .
The device with a liquid detection function according to claim 16, wherein the device further comprises a tank;

The tank body is provided with a containing cavity for containing liquid;

There are multiple liquid detection devices, and all the liquid detection devices are located at the bottom of the tank;

Wherein, all the liquid detection devices are symmetrically arranged with the central axis of the containing cavity as the center.
A liquid detection method, characterized in that it is applied to the liquid detection device according to any one of claims 1 to 14, or applied to the containment box with liquid detection function according to claim 15, or applied to the right The equipment with liquid detection function described in claim 16 or 17;

The method includes:

Acquiring the first detection data sent by the first acoustic wave detection component, the emission time of the first acoustic wave, and the detection time of receiving the detection wave corresponding to the first acoustic wave;

Get the preset distance;

Performing propagation velocity calculation according to the first emitted sound wave time, the detection time of the detection wave corresponding to the first sound wave, and the preset distance to obtain the sound wave propagation velocity in the liquid;

Obtain the detection type and liquid temperature sent by the temperature detection component;

When the detection type is liquid type detection, a liquid type correspondence table is obtained, and the liquid type is determined according to the sound wave propagation velocity in the liquid, the liquid temperature, and the liquid type correspondence table. The liquid type correspondence table includes liquid Name, standard temperature, standard sound wave propagation speed;

When the detection type is liquid concentration detection, a liquid concentration correspondence table is obtained, and the liquid concentration is determined according to the sound wave propagation speed in the liquid, the liquid temperature, and the liquid concentration correspondence table. The liquid concentration correspondence table includes liquid Concentration, standard temperature, standard sound wave propagation speed.
The liquid detection method according to claim 18, wherein after said obtaining the detection type and the liquid temperature sent by the temperature detection component, the method further comprises:

Acquiring the second detection data sent by the dielectric constant detection component;

Calculating the dielectric constant according to the second detection data to obtain the dielectric constant of the liquid;

The determining the liquid type according to the sound wave propagation speed in the liquid, the liquid temperature, and the liquid type correspondence table specifically includes: according to the sound wave propagation speed in the liquid, the liquid temperature, the liquid dielectric constant, The liquid type correspondence table determines the liquid type;

The determining the liquid concentration according to the sound wave propagation speed in the liquid, the liquid temperature, and the liquid concentration correspondence table specifically includes: according to the sound wave propagation speed in the liquid, the liquid temperature, the liquid dielectric constant, The liquid concentration correspondence table determines the liquid concentration.
19. The liquid detection method according to claim 19, wherein after said obtaining the second detection data sent by the dielectric constant detection component, the method further comprises:

Acquiring the third detection data sent by the conductivity detection component;

Calculating the conductivity according to the third detection data to obtain the conductivity of the liquid;

The determining the liquid type according to the sound wave propagation speed in the liquid, the liquid temperature, the liquid dielectric constant, and the liquid type correspondence table specifically further includes: according to the sound wave propagation speed in the liquid, the liquid temperature , The liquid dielectric constant, the liquid conductivity, and the liquid type correspondence table determine the liquid type;

The determining the liquid concentration according to the sound wave propagation speed in the liquid, the liquid temperature, the liquid dielectric constant, and the liquid concentration correspondence table specifically further includes: according to the sound wave propagation speed in the liquid, the liquid temperature , The liquid dielectric constant, the liquid conductivity, and the liquid concentration correspondence table determine the liquid concentration.