Ultrasonic sensor for liquid level measurement

Abstract

The utility model discloses an ultrasonic sensor for liquid level measurement, and particularly relates to the technical field of ultrasonic sensors, which comprises a piezoelectric ceramic probe, an ultrasonic generator is fixedly arranged at the top of the piezoelectric ceramic probe, a support plate is fixedly arranged at the top of the ultrasonic generator, and a detachable adjusting component is fixedly arranged at the top of the support plate. The adjusting assembly comprises a long plate, a sliding groove is formed in the bottom of the long plate, a lead screw is rotationally connected into the sliding groove, a nut block is connected to the lead screw in a threaded mode, the nut block is arranged in the sliding groove in a sliding mode, and a connecting plate is fixedly arranged at the bottom end of the nut block. The ultrasonic generator is matched with the piezoelectric ceramic probe, the piezoelectric ceramic probe sends out ultrasonic waves to automatically detect the liquid level of liquid, the adjusting assembly can be used for driving the connecting plate and the ultrasonic generator to move, so that the position of the piezoelectric ceramic probe is changed, and the piezoelectric ceramic probe conducts detection from different positions; and the detection accuracy can be improved.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic sensor technology, and more specifically to an ultrasonic sensor for liquid level measurement. Background Technology

[0002] Liquid level measurement is the process of determining the position of the liquid surface in a container, and it is crucial in many industries and everyday life scenarios. In the chemical industry, accurate liquid level measurement is essential for controlling chemical reactions; in wastewater treatment plants, liquid level measurement in each treatment unit helps control the flow of wastewater and the treatment process. Currently, traditional liquid level measurement methods rely on mechanical measuring devices. These devices cannot respond in real time to situations requiring the measurement of instantaneous dynamic signals and have relatively large measurement errors. With technological advancements, ultrasonic liquid level sensors are now used to detect liquid levels, offering significantly lower measurement errors and much higher accuracy compared to traditional mechanical measuring devices.

[0003] Existing liquid level measurement methods employ ultrasonic level sensors, which typically consist of an ultrasonic generator and an ultrasonic probe. The ultrasonic probe can utilize piezoelectric ceramic elements. For example, a liquid level measurement system with prior art publication number CN218865222U measures the liquid level using an ultrasonic level detection module. The coupling sleeve in the ultrasonic level detection module fits tightly against the bottom of the liquid container's outer wall, reducing energy loss of the ultrasonic signal before it reaches the liquid, thus achieving accurate liquid level measurement.

[0004] However, the above-mentioned prior art still has the following problems when used: because liquids are fluid, they may fluctuate in the container. Fluctuations in the liquid at different positions will affect the reflection and propagation of ultrasonic waves, thus leading to inaccurate detection. Based on this, the present invention provides an ultrasonic sensor with adjustable detection position and high detection accuracy for liquid level measurement. Utility Model Content

[0005] To overcome the aforementioned deficiencies in the prior art, this utility model provides an ultrasonic sensor for liquid level measurement. The sensor works in conjunction with an ultrasonic generator and a piezoelectric ceramic probe, which emits ultrasonic waves to automatically detect the liquid level. Furthermore, an adjustment component can be used to move the connecting plate and the ultrasonic generator, thereby changing the position of the piezoelectric ceramic probe and allowing it to detect from different locations. This improves the accuracy of the detection and solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an ultrasonic sensor for liquid level measurement, comprising a piezoelectric ceramic probe, an ultrasonic generator fixedly mounted on the top of the piezoelectric ceramic probe, a support plate fixedly mounted on the top of the ultrasonic generator, a detachable adjustment assembly fixedly mounted on the top of the support plate, the adjustment assembly comprising a long plate, a groove formed at the bottom of the long plate, a lead screw rotatably connected within the groove, a nut block threadedly connected to the lead screw, the nut block slidably disposed within the groove, a connecting plate fixedly mounted at the bottom end of the nut block, and the connecting plate and the support plate connected by a plug-in assembly, facilitating quick assembly and disassembly of the ultrasonic generator and the piezoelectric ceramic probe by operators.

[0007] In a preferred embodiment, the top of the support plate is fixedly provided with a plurality of positioning blocks, and the bottom of the connecting plate is provided with positioning grooves that are adapted to the positioning blocks. The positioning blocks are inserted into the positioning grooves, which makes it easy for workers to quickly fix the support plate and the connecting plate together.

[0008] In a preferred embodiment, the plug-in assembly includes multiple spring pins, which are fixedly inserted through the outer wall of the connecting plate. Each positioning block has a slot that matches the spring pin. The spring pins are plugged into the slots to connect the support plate and the connecting plate, which facilitates quick installation and disassembly of the ultrasonic generator and the piezoelectric ceramic probe, and allows for their maintenance and replacement.

[0009] In a preferred embodiment, the front end of the connecting plate is provided with a mounting groove, and a level is fixedly installed inside the mounting groove, allowing workers to detect the levelness of the support plate through the level.

[0010] In a preferred embodiment, a servo motor is fixedly inserted through one side of the long plate. One end of the output shaft of the servo motor passes through the long plate and is fixed to one end of the lead screw. The servo motor can automatically drive the lead screw to rotate without manual operation, making it very convenient to use.

[0011] In a preferred embodiment, two symmetrically distributed fixing plates are fixed to the outer walls of both the front and rear sides of the long plate, and each fixing plate has a rectangular mounting hole machined on its top to improve the stability of the long plate.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] 1. This utility model uses an ultrasonic generator in conjunction with a piezoelectric ceramic probe. The piezoelectric ceramic probe emits ultrasonic waves to automatically detect the liquid level. Furthermore, the connecting plate and ultrasonic generator can be moved by an adjustment component to change the position of the piezoelectric ceramic probe, allowing it to detect from different positions and thus improving the accuracy of the detection.

[0014] 2. By inserting the pin assembly into the slot, the support plate and the connecting plate can be firmly fixed together. Pulling the spring pin can remove it from the slot, making it easy to quickly disassemble the support plate. This facilitates the maintenance and replacement of the ultrasonic generator and piezoelectric ceramic probe. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a bottom view of the overall structure of this utility model;

[0017] Figure 3 This is a cross-sectional view of the connecting plate of this utility model;

[0018] Figure 4 This is a bottom view of the connecting plate of this utility model;

[0019] Figure 5 This is a schematic diagram of the present invention when detecting liquid level.

[0020] The attached figures are labeled as follows: 1. Piezoelectric ceramic probe; 2. Ultrasonic generator; 3. Support plate; 4. Adjustment assembly; 5. Plug-in assembly; 6. Positioning block; 7. Positioning groove; 8. Mounting groove; 9. Level; 10. Servo motor; 11. Fixing plate; 12. Rectangular mounting hole;

[0021] 401. Long plate; 402. Slide groove; 403. Lead screw; 404. Nut block; 405. Connecting plate;

[0022] 501. Spring pin; 502. Slot. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Refer to the instruction manual appendix Figure 1-5This utility model provides an ultrasonic sensor for liquid level measurement, including a piezoelectric ceramic probe 1. Specifically, when a voltage is applied to the two ends of the piezoelectric ceramic probe 1, it will generate mechanical deformation vibration according to the inverse piezoelectric effect. This vibration can emit ultrasonic waves for detection. The piezoelectric ceramic probe 1 is model TC25-16T. An ultrasonic generator 2 is fixedly installed on the top of the piezoelectric ceramic probe 1. The ultrasonic generator 2 is a device that can generate high-frequency alternating current signals. Its main function is to provide electrical energy of appropriate frequency and power to the piezoelectric ceramic probe 1 to drive the transducer to generate ultrasonic waves. The ultrasonic generator 2 is model KG-X6.

[0025] The ultrasonic generator 2 is fixedly provided with a support plate 3 at the top, and a detachable adjustment component 4 is fixedly provided at the top of the support plate 3. The adjustment component 4 includes a long plate 401, and a sliding groove 402 is provided at the bottom of the long plate 401. A lead screw 403 is rotatably connected in the sliding groove 402. A nut block 404 is threadedly connected to the lead screw 403. The nut block 404 is slidably disposed in the sliding groove 402. A connecting plate 405 is fixedly provided at the bottom end of the nut block 404.

[0026] Furthermore, a servo motor 10 is fixedly inserted through one side of the long plate 401. One end of the output shaft of the servo motor 10 passes through the long plate 401 and is fixed to one end of the lead screw 403. With the help of the servo motor 10, the lead screw 403 can be automatically driven to rotate without manual operation, which is very convenient to use.

[0027] Furthermore, two symmetrically distributed fixing plates 11 are fixed on the outer walls of both the front and rear sides of the long plate 401. Each fixing plate 11 has a rectangular mounting hole 12 machined on its top to improve the stability of the long plate 401.

[0028] In use, the operator first fixes the long plate 401 above the liquid to be tested. Then, the ultrasonic generator 2 and the piezoelectric ceramic probe 1 are used together. The piezoelectric ceramic probe 1 emits ultrasonic waves to automatically detect the liquid level. The servo motor 10 can also be used to drive the lead screw 403 to rotate. The nut block 404 on the lead screw 403 drives the connecting plate 405 and the ultrasonic generator 2 to move, thereby changing the position of the piezoelectric ceramic probe 1. This allows the piezoelectric ceramic probe 1 to perform detection at different positions, which can improve the detection range and the detection accuracy, making the detection results more convincing.

[0029] Refer to the instruction manual appendix Figure 1-5 The connecting plate 405 and the support plate 3 are connected by a plug-in assembly 5. The top of the support plate 3 is fixedly provided with a plurality of positioning blocks 6, and the bottom of the connecting plate 405 is provided with a positioning groove 7 that matches the positioning blocks 6. The positioning blocks 6 are inserted into the positioning groove 7, which makes it easy for workers to quickly fix the support plate 3 and the connecting plate 405 together.

[0030] Specifically, the plug-in assembly 5 includes multiple spring pins 501, which are fixedly inserted through the outer wall of the connecting plate 405. Each positioning block 6 has a slot 502 that matches the spring pin 501, and the spring pin 501 is plugged into the slot 502.

[0031] By setting multiple spring pins 501 on the connecting plate 405, and using the spring pins 501 to insert into the slots 502 on the positioning block 6, the support plate 3 can be firmly fixed together with the connecting plate 405. Furthermore, by pulling the spring pins 501 out of the slots 502, the support plate 3 can be directly removed from the connecting plate 405. This facilitates the quick installation and disassembly of the ultrasonic generator 2 and the piezoelectric ceramic probe 1, and allows for their inspection and replacement.

[0032] The front end of the connecting plate 405 is provided with an installation groove 8, and a level 9 is fixedly installed inside the installation groove 8. The operator can use the level 9 to detect the levelness of the support plate 3.

[0033] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An ultrasonic sensor for liquid level measurement, characterized in that: Includes a piezoelectric ceramic probe (1), an ultrasonic generator (2) is fixedly mounted on the top of the piezoelectric ceramic probe (1), a support plate (3) is fixedly mounted on the top of the ultrasonic generator (2), and a detachable adjustment component (4) is fixedly mounted on the top of the support plate (3). The adjustment component (4) includes a long plate (401), a groove (402) is provided at the bottom of the long plate (401), a lead screw (403) is rotatably connected in the groove (402), a nut block (404) is threaded on the lead screw (403), the nut block (404) is slidably disposed in the groove (402), and a connecting plate (405) is fixedly provided at the bottom end of the nut block (404); The connecting plate (405) is connected to the ultrasonic generator (2) via a plug-in assembly (5).

2. The ultrasonic sensor for liquid level measurement according to claim 1, characterized in that: The support plate (3) has multiple positioning blocks (6) fixedly installed on its top, and the connecting plate (405) has a positioning groove (7) adapted to the positioning blocks (6) at its bottom, and the positioning blocks (6) are inserted into the positioning groove (7).

3. The ultrasonic sensor for liquid level measurement according to claim 2, characterized in that: The plug-in assembly (5) includes multiple spring pins (501), which are fixedly inserted through the outer wall of the connecting plate (405). Each positioning block (6) has a slot (502) that is compatible with the spring pin (501), and the spring pin (501) is plugged into the slot (502).

4. The ultrasonic sensor for liquid level measurement according to claim 1, characterized in that: The front end of the connecting plate (405) is provided with an installation groove (8), and a level (9) is fixedly installed inside the installation groove (8).

5. The ultrasonic sensor for liquid level measurement according to claim 1, characterized in that: A servo motor (10) is fixedly inserted through one side of the long plate (401). One end of the output shaft of the servo motor (10) passes through the long plate (401) and is fixed to one end of the lead screw (403).

6. The ultrasonic sensor for liquid level measurement according to claim 1, characterized in that: The long plate (401) has two symmetrically distributed fixing plates (11) fixed on the outer walls of both the front and rear sides. Each fixing plate (11) has a rectangular mounting hole (12) machined on its top.

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