A non-contact liquid concentration detection device and method

Abstract

This invention relates to a non-contact liquid concentration detection device and method. The device includes a liquid container, a pulse compression system for compressing transmitted and received pulses, a transmitting sensor, a receiving sensor, and a display module for displaying measurement results. The output of the pulse compression system is connected to the transmitting sensor, the receiving sensor is connected to the receiving end of the pulse compression system, and the display module is connected to the pulse compression system. The transmitting and receiving sensors are symmetrically fixed on both sides of the liquid container, with their front faces facing the liquid container. Compared with existing technologies, this invention has advantages such as high measurement accuracy, low environmental requirements, and ease of use.

Description

Technical Field

[0001] This invention relates to the field of liquid concentration detection devices, and in particular to a non-contact liquid concentration detection device and method. Background Technology

[0002] Currently, liquid concentration measurement technology is widely used in industrial and scientific research fields. Traditional concentration measurement methods, such as refractive index, conductivity, and density methods, have poor sensitivity for measuring liquids with low concentrations. Optical sensing technologies, such as infrared spectroscopy, Raman spectroscopy, and fluorescence spectroscopy, are widely used in liquid concentration measurement. These methods determine the liquid concentration by measuring the absorption, scattering, or emission characteristics of light. However, these methods are overly complex, difficult to implement, and have high environmental requirements.

[0003] Other technologies, such as X-ray detection, which utilize the differences in the penetrability and attenuation of various rays, suffer from high costs, unsatisfactory monitoring efficiency, and certain safety risks. With the development of the Internet of Things and artificial intelligence, the demand for liquid concentration measurement technologies is also increasing, and they are trending towards intelligence and automation. Sensors and measuring devices can be connected to computer systems to achieve real-time monitoring, data analysis, and automatic control.

[0004] For comparison with on-site measured concentration data, the traditional chemical weighing calculation method is generally used, which is cumbersome and requires a certain level of chemical knowledge.

[0005] In summary, existing non-contact measurement methods for liquids suffer from high environmental requirements, cumbersome operation, and high costs. Therefore, there is an urgent need to provide a non-contact liquid concentration detection device that is simple to operate, low in cost, and has low requirements. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art, such as high environmental requirements, cumbersome operation, and high cost, and to provide a non-contact liquid concentration detection device and method.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] This solution provides a non-contact liquid concentration detection device, including a liquid container, a pulse compression system for compressing the transmitted and received pulses, a transmitting sensor, a receiving sensor, and a display module for displaying the measurement results;

[0009] The output end of the pulse compression system is connected to the transmitting end sensor, the receiving end sensor is connected to the receiving end of the pulse compression system, the display module is connected to the pulse compression system, and the transmitting end sensor and the receiving end sensor are symmetrically fixed on both sides of the liquid container, with the front of the transmitting end sensor and the receiving end sensor facing the liquid container.

[0010] Furthermore, the lower end face of the transmitting sensor is tilted upward along the horizontal plane at a first angle, and the lower end face of the receiving sensor is tilted upward along the horizontal plane at a second angle, wherein the range of the first tilt angle and the second tilt angle is 10-15°.

[0011] Furthermore, the first angle is equal to the second angle.

[0012] Furthermore, the width of the liquid container is 60-80% of the distance between the transmitting sensor and the receiving sensor.

[0013] Furthermore, the distance between the transmitting end sensor and the receiving end sensor is 160-180mm, the liquid container is a cylindrical body with an outer diameter of 110-120mm and a wall thickness of 0.4-0.8mm.

[0014] Furthermore, the transmitting end of the transmitting sensor is provided with a first coating, and the receiving end of the receiving sensor is provided with a second coating, wherein the thickness of the first coating is 1.5-2.5 times the thickness of the second coating.

[0015] Furthermore, the thickness of the first coating ranges from 4 to 6 μm, and the thickness of the second coating ranges from 2 to 3 μm.

[0016] Furthermore, a coupler and a bias power supply are provided between the pulse compression system and the transmitting sensor. The output of the pulse compression system is connected to the input of the coupler, the bias power supply is connected to the input of the coupler, and the output of the coupler is connected to the transmitting sensor.

[0017] Furthermore, the pulse compression system and the receiving sensor are equipped with a charge amplifier, the input of which is connected to the receiving sensor, and the output of which is connected to the receiving end of the pulse compression system.

[0018] This solution also provides a method for a non-contact liquid concentration detection device, including the following steps:

[0019] The transmitting and receiving sensors are symmetrically fixed on both sides of the liquid container, with the transmitting and receiving sensors tilted upwards and their front faces facing the liquid container.

[0020] The pulse voltage generated by the pulse compression system is transmitted to the transmitting sensor via a coupler. The transmitting sensor generates a pulse signal, and the receiving sensor receives the pulse signal reflected by the liquid.

[0021] The receiving sensor amplifies the received signal through a charge amplifier and then sends the amplified signal to a pulse compression system. The result of the received pulse signal is displayed through a display module.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] (1) This scheme transmits a pulse voltage to the transmitting sensor via the output of the pulse compression system. The transmitting sensor then generates a pulse signal, and the receiving sensor receives the pulse signal projected onto the liquid container and transmits the received signal to the receiving end of the pulse compression system. The pulse compression system displays the received pulse compression data through the display module. There is a corresponding relationship between the received pulse and the liquid, meaning the displayed data represents the concentration of the liquid in the container. No special environmental requirements are needed; the transmitting and receiving sensors can be placed on either side of the liquid to be tested for concentration detection. The measurement results are directly displayed through the display module, making operation convenient and quick. Furthermore, the device has a simple structure and low cost.

[0024] (2) In this scheme, the transmitting end sensor and the receiving end sensor are tilted and kept at the horizontal plane, and both the transmitting end sensor and the receiving end sensor are tilted upwards, so that the receiving end sensor can receive the reflected signal from below the liquid surface, which improves the reliability of the measurement data. Attached Figure Description

[0025] Figure 1 A schematic diagram of the non-contact liquid concentration detection device provided by the present invention;

[0026] In the diagram: 1. Liquid container, 2. Transmitter sensor, 3. Bias power supply, 4. Coupler, 5. Pulse generator, 6. Display module, 7. Pulse receiver, 8. Charge amplifier, 9. Receiver sensor. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0031] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0032] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] Example 1

[0034] This embodiment provides a non-contact liquid concentration detection device, such as... Figure 1 As shown, it includes a liquid container 1, a pulse compression system for compressing the transmitted and received pulses, a transmitter sensor 2, a receiver sensor 9, and a display module for displaying measurement results.

[0035] The output end of the pulse compression system is connected to the transmitter sensor 2, the receiver sensor 9 is connected to the receiver of the pulse compression system, and the display module is connected to the pulse compression system. The transmitter sensor 2 and the receiver sensor 9 are symmetrically fixed on both sides of the liquid container 1, and the front of the transmitter sensor 2 and the receiver sensor 9 both face the liquid container 1.

[0036] Working principle: The output end of the pulse compression system sends a pulse voltage to the transmitting end sensor 2. Then, the transmitting end sensor 2 generates a pulse signal. The receiving end sensor 9 receives the pulse signal projected through the liquid container 1 and transmits the received signal to the receiving end of the pulse compression system. The pulse compression system displays the received pulse compression data through the display module. The displayed data is the concentration of the liquid in the container.

[0037] This scheme transmits a pulse voltage to the transmitting sensor 2 via the output of the pulse compression system. The transmitting sensor 2 then generates a pulse signal, which is received by the receiving sensor 9 after passing through the liquid container 1. The received signal is then transmitted to the receiving end of the pulse compression system, which displays the received pulse compression data through a display module. There is a correspondence between the received pulse and the liquid concentration; the displayed data represents the concentration of the liquid in the container. No special environmental requirements are needed. Concentration detection can be performed simply by placing the transmitting sensor 2 and the receiving sensor 9 on either side of the liquid to be tested. The measurement results are directly displayed through the display module, making operation convenient and quick, and the device has a simple structure and low cost.

[0038] In a preferred embodiment, the lower end face of the transmitting sensor 2 is tilted upward along the horizontal plane at a first angle, and the lower end face of the receiving sensor 9 is tilted upward along the horizontal plane at a second angle. The range of the first tilt angle and the second tilt angle is 10-15°. In this embodiment, the first angle is equal to the second angle and both are 12°.

[0039] By tilting the transmitter and receiver sensors to maintain their horizontal position and tilting them upwards, the receiver sensor can receive reflected signals from below the liquid surface, thus improving the reliability of the measurement data.

[0040] Specifically, the width of the liquid container 1 is 60-80% of the distance between the transmitting sensor 2 and the receiving sensor 9. The distance between the transmitting sensor 2 and the receiving sensor 9 is 160-180mm. The liquid container 1 is a cylindrical body with an outer diameter of 110-120mm and a wall thickness of 0.4-0.8mm. In this embodiment, the distance between the transmitting sensor 2 and the receiving sensor 9 is 170mm, the outer diameter of the liquid container 1 is 116mm, and the wall thickness of the liquid container 1 is 0.6mm. This ensures that the distance between the transmitting sensor 2 and the receiving sensor 9, as well as the wall thickness of the liquid container 1, will not affect signal transmission and reception.

[0041] In a preferred embodiment, the transmitting end of the transmitting sensor 2 has a first coating, and the receiving end of the receiving sensor 9 has a second coating. The thickness of the first coating is 1.5-2.5 times the thickness of the second coating. The thickness of the first coating ranges from 4-6 μm, and the thickness of the second coating ranges from 2-3 μm. In this embodiment, the thickness of the first coating is 5 μm. The first coating uses a back film to withstand the pulses generated by the high-voltage source, preventing the film from rupturing. The thickness of the second coating is 2.5 μm. The second coating uses a thin film to receive pulse signals, effectively improving the sensitivity of signal acquisition.

[0042] Specifically, a coupler 4 and a bias power supply 3 are provided between the pulse compression system and the transmitting sensor 2. The output of the pulse compression system is connected to the input of the coupler 4, the bias power supply 3 is connected to the input of the coupler 4, and the output of the coupler 4 is connected to the transmitting sensor 2. The bias power supply 3 is a DC power supply with a voltage of 180-220V. In this embodiment, the voltage of the bias power supply 3 is 200V.

[0043] The pulse compression system and the receiving sensor 9 are equipped with a charge amplifier 8. The input of the charge amplifier 8 is connected to the receiving sensor 9, and the output of the charge amplifier 8 is connected to the receiving end of the pulse compression system.

[0044] The pulse compression system includes a pulse generator 5 and a pulse receiver 7. The voltage generated by the pulse generator 5 is superimposed with the voltage generated by the bias power supply through a coupler 4 to provide a 1.5MHz bandwidth capacitive source for the transmitting sensor 2 to generate pulse signals. In this embodiment, both the transmitting sensor 2 and the receiving sensor 9 are capacitive sensors. The receiving sensor 9 transmits the received signal to the charge amplifier 8, which amplifies the signal before transmitting it to the pulse receiver 7. The obtained pulse data is displayed through a display module, resulting in faster response times and allowing for direct observation of measurement results, making it more intuitive.

[0045] This embodiment also provides a method based on a non-contact liquid concentration detection device, including the following steps:

[0046] The transmitting and receiving sensors are symmetrically fixed on both sides of the liquid container, with the transmitting and receiving sensors tilted upwards and their front faces facing the liquid container.

[0047] The pulse voltage generated by the pulse compression system is transmitted to the transmitting sensor via a coupler. The transmitting sensor generates a pulse signal, and the receiving sensor receives the pulse signal reflected by the liquid.

[0048] The receiving sensor amplifies the received signal through a charge amplifier and then sends the amplified signal to a pulse compression system. The result of the received pulse signal is displayed through a display module.

[0049] The non-contact concentration measuring device provided in this embodiment can not only measure the concentration of liquids, but also be used to measure and record physical and chemical quantities of concentration waveform tubes, such as temperature, pressure, density and acidity / alkalinity.

[0050] This invention employs ultrasonic technology to measure liquid concentration. Besides measuring liquid concentration, ultrasonic technology can also be used to measure parameters such as liquid temperature, viscosity, and flow rate. Overall, this device using ultrasonic liquid concentration measurement technology has the following advantages: It can perform measurements without contact with the liquid, preventing contamination or interference; it is suitable for measuring the concentration of various liquids, covering a wide concentration range; it has high measurement accuracy with minimal measurement error; it has a fast response speed, allowing real-time monitoring of changes in liquid concentration; and it has low environmental requirements, making it suitable for complex industrial environments.

[0051] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A non-contact liquid concentration detection device, characterized in that, It includes a liquid container (1), a pulse compression system for compressing the transmitted and received pulses, a transmitter sensor (2), a receiver sensor (9), and a display module for displaying the measurement results; The output end of the pulse compression system is connected to the transmitter sensor (2), the receiver sensor (9) is connected to the receiver of the pulse compression system, the display module is connected to the pulse compression system, the transmitter sensor (2) and the receiver sensor (9) are symmetrically fixed on both sides of the liquid container (1), and the front of the transmitter sensor (2) and the receiver sensor (9) both face the liquid container (1). The transmitting end of the transmitting end sensor (2) is provided with a first coating, and the receiving end of the receiving end sensor (9) is provided with a second coating. The thickness of the first coating is 1.5-2.5 times the thickness of the second coating. The thickness of the first coating ranges from 4 to 6 μm, and the thickness of the second coating ranges from 2 to 3 μm.

2. The non-contact liquid concentration detection device according to claim 1, characterized in that, The lower end face of the transmitting end sensor (2) is tilted upward along the horizontal plane at a first angle, and the lower end face of the receiving end sensor (9) is tilted upward along the horizontal plane at a second angle. The range of the first angle and the second angle is 10-15°.

3. The non-contact liquid concentration detection device according to claim 2, characterized in that, The first angle is equal to the second angle.

4. The non-contact liquid concentration detection device according to claim 1, characterized in that, The width of the liquid container (1) is 60-80% of the distance between the transmitting sensor (2) and the receiving sensor (9).

5. A non-contact liquid concentration detection device according to claim 4, characterized in that, The distance between the transmitting end sensor (2) and the receiving end sensor (9) is 160-180mm. The liquid container (1) is a cylindrical body with an outer diameter of 110-120mm and a wall thickness of 0.4-0.8mm.

6. The non-contact liquid concentration detection device according to claim 1, characterized in that, A coupler (4) and a bias power supply (3) are provided between the pulse compression system and the transmitter sensor (2). The output end of the pulse compression system is connected to the input end of the coupler (4), the bias power supply (3) is connected to the input end of the coupler (4), and the output end of the coupler (4) is connected to the transmitter sensor (2).

7. The non-contact liquid concentration detection device according to claim 1, characterized in that, The pulse compression system and the receiving sensor (9) are equipped with a charge amplifier (8). The input of the charge amplifier (8) is connected to the receiving sensor (9), and the output of the charge amplifier (8) is connected to the receiving end of the pulse compression system.

8. A method for a non-contact liquid concentration detection device according to any one of claims 1-7, characterized in that, Includes the following steps: The transmitting and receiving sensors are symmetrically fixed on both sides of the liquid container, with the transmitting and receiving sensors tilted upwards and their front faces facing the liquid container. The pulse voltage generated by the pulse compression system is transmitted to the transmitting sensor via a coupler. The transmitting sensor generates a pulse signal, and the receiving sensor receives the pulse signal reflected by the liquid. The receiving sensor amplifies the received signal through a charge amplifier and then sends the amplified signal to a pulse compression system. The result of the received pulse signal is displayed through a display module.

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