A piezoelectric vibration displacement sensor

Abstract

The present invention relates to the technical field of displacement sensors, and discloses a piezoelectric vibration displacement sensor, comprising a two-core connector, the bottom of the two-core connector is fixedly connected to a shell, the inside of the shell is fixedly connected to a signal conditioning circuit, the top of the signal conditioning circuit is electrically connected to the two-core connector through a connecting line, the bottom of the signal conditioning circuit is fixedly connected to an inner shell, the inside of the inner shell is fixedly connected to a mass block, the inner side of the mass block is fixedly connected to a sensitive element, the bottom of the inner shell is fixedly connected to a core body, the bottom of the core body is fixedly connected to an insulating plate, the bottom of the shell is fixedly connected to a base, and the top of the mass block is fixedly connected to a conductive sheet. The piezoelectric vibration displacement sensor is not only easy to disassemble and assemble, but also does not require external tools for auxiliary disassembly and assembly, which saves time and effort, is convenient for repairing the displacement sensor, and is simple to operate and suitable for various situations.

Description

Technical Field

[0001] The invention relates to the technical field of displacement sensors, in particular to a piezoelectric vibration displacement sensor. Background Art

[0002] Displacement sensor, also known as linear sensor, is a linear device that belongs to metal sensing. The function of the sensor is to convert various measured physical quantities into electrical quantities. In the production process, displacement measurement is generally divided into two types: measuring physical size and mechanical displacement. According to the different forms of transformation of the measured variable, displacement sensors can be divided into analog and digital types. Analog types can be divided into physical type and structural type.

[0003] Commonly used displacement sensors are mostly analog structures, including potentiometer displacement sensors, inductive displacement sensors, synchro, capacitive displacement sensors, eddy current displacement sensors and Hall displacement sensors, such as CN105952714 B discloses an external displacement sensor for dynamic testing of hydraulic cylinders. The displacement sensor is installed in the sleeve on the mounting seat by means of a sliding sleeve and a guide sleeve cooperating with each other, and the displacement sensor is vertically limited and slidably mounted in the sleeve. The striker at the upper end of the displacement sensor presses against the bottom surface of the pressure block, and the pressure block is connected to the bottom surface of the hydraulic cylinder through a screw, a pressure plate and a fixing bolt. The hydraulic cylinder piston moves in a small range, and the pressure plate and the pressure block touch the striker, so that the displacement sensor outputs multiple signals. These signals can be stored, analyzed or curve-drawn, etc., so as to achieve the purpose of being easy to carry and disassemble. The small size has low requirements on the environment for on-site use, the test accuracy is high, the pressure plate length is adjustable, and the placement and position of the hydraulic cylinder are flexible. It is suitable for the purpose of testing the dynamic performance of various types of hydraulic cylinders. However, it still has the disadvantage of being inconvenient to disassemble and assemble. It is fixed by bolts. During the disassembly and assembly process, not only external tools are required for auxiliary disassembly and assembly, but also it is time-consuming and labor-intensive, and it is not convenient to repair and replace the displacement sensor, which affects its use efficiency. Therefore, the above piezoelectric vibration displacement sensor is proposed to solve the above problems. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides a piezoelectric vibration displacement sensor, which has the advantages of easy disassembly and assembly, and solves the problem that fixing with bolts not only requires external tools to assist in disassembly and assembly, but also is time-consuming and labor-intensive, making it inconvenient to repair and replace the displacement sensor, thereby affecting its use efficiency.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose of easy disassembly and assembly, the present invention provides the following technical solutions: a piezoelectric vibration displacement sensor, comprising a two-core connector, the bottom of the two-core connector is fixedly connected to an outer shell, the interior of the outer shell is fixedly connected to a signal conditioning circuit, the top of the signal conditioning circuit is electrically connected to the two-core connector through a connecting line, the bottom of the signal conditioning circuit is fixedly connected to an inner shell, the interior of the inner shell is fixedly connected to a mass block, the inner side of the mass block is fixedly connected to a sensitive element, the bottom of the inner shell is fixedly connected to a core body, the bottom of the core body is fixedly connected to an insulating plate, the bottom of the outer shell is fixedly connected to a base, the top of the mass block is fixedly connected to a conductive sheet, the bottom of the base is fixedly connected to a bottom plate, the bottom of the bottom plate is fixedly connected to a plug, and the outer surface of the plug is movably connected to The top of the left side of the fixing groove and the bottom of the right side of the fixing groove are fixedly connected with internal threads, the top of the left side of the fixing groove and the bottom of the right side of the insertion rod are fixedly connected with external threads, and the external threads are meshed with the internal threads, and the left and right ends of the top of the mounting block are meshed with threaded sleeves, the inner side of the threaded sleeve is threadedly connected with a screw, the top of the screw is fixedly connected with an abutment plate, the bottom of the fixing groove is fixedly connected with a sleeve, the bottom of the inner cavity of the sleeve is fixedly connected with a spring, the top of the spring is fixedly connected with a connecting plate, the top of the connecting plate is fixedly connected with a sliding rod, the bottom of the mounting block is fixedly connected with a mounting plate, and the top of the mounting plate is movably connected with mounting bolts all around, abutment holes are provided at the left and right ends of the bottom of the bottom of the base plate, and a positioning groove is provided at the bottom of the insertion rod.

[0008] Preferably, the fixing groove is elliptical and inclined, and the inclination direction is from bottom to top and to the right side based on the vertical line.

[0009] Preferably, a thread groove is provided on the inner side of the threaded sleeve, and the thread groove is matched with the thread on the outer surface of the screw.

[0010] Preferably, the abutment plate is located inside the abutment hole, and the abutment plate and the abutment hole abut against each other.

[0011] Preferably, the outer side of the connecting plate is slidably connected to the inner wall of the sleeve, and the top of the sliding rod penetrates and extends to the outside of the sleeve and is slidably connected to the sleeve.

[0012] Preferably, the positioning groove is a semicircular positioning groove, and the mounting block is a cylindrical shape with an internal groove.

[0013] Preferably, a roller is fixedly connected to the top of the sliding rod, and the upper part of the roller is located inside the positioning groove and is slidably connected to the positioning groove.

[0014] Preferably, a rotating disk is fixedly connected to the outer surface of the screw rod, and the two threaded sleeves are respectively located at the left and right ends of the top of the fixing groove.

[0015] Preferably, the top of the conductive sheet is fixedly connected to the bottom of the signal conditioning circuit, and the bottom of the insulating plate is fixedly connected to the top of the inner side of the base.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the present invention provides a piezoelectric vibration displacement sensor, which has the following beneficial effects:

[0018] 1. The piezoelectric vibration displacement sensor achieves the limit of the upper and lower positions of the plug rod by meshing the external thread with the internal thread. At the same time, the abutment plate and the abutment hole abut against each other and apply an abutment force upward, and the spring applies an elastic force upward and abuts the plug rod to achieve the limit of the left and right positions of the plug rod. When disassembly is required, the rotating disk is twisted and the screw rod is driven to move downward until the bottom of the rotating disk fits with the top of the threaded sleeve, reducing the height of the screw rod, and then the plug rod is tilted to the right so that the external thread and the internal thread are no longer meshed, and the plug rod is moved upward. The rod and the mounting block can be separated. When installation is required, the rod is inserted into the fixing groove in an inclined state, the bottom of the rod contacts the roller, and then the rod is gradually pushed into a vertical state, so that the roller moves into the positioning groove, and the external thread engages with the internal thread. Then the rotating disk is rotated to make the abutment plate in the abutment hole, and the entire installation process is completed. The device is not only easy to disassemble and assemble, but also does not require external tools for auxiliary disassembly and assembly, which saves time and effort, is convenient for repairing the displacement sensor, and is simple to operate and suitable for various situations.

[0019] 2. The piezoelectric vibration displacement sensor fixes the sensitive element on the core body through the mass block by an external compression screw and a compression nut. The mass block and the sensitive element are connected by a conductive sheet and a pre-tightening force of 150 kg is applied to form a sensitive component assembly. The sensitive component assembly and the inner shell are tightened with epoxy glue and isolated from the base by an insulating plate and bonded with high-temperature glue. The signal conditioning circuit is fixed on the inner shell and connected to the sensitive component assembly with enameled wire. The two-core connector is connected to the signal conditioning circuit through a connecting wire and fixed to the base by laser welding, thereby realizing the assembly of the displacement sensor. The displacement sensor is easy and fast to assemble, the components are reasonably distributed, and the structure is simple, the cost is low, and it is easy for users to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a piezoelectric vibration displacement sensor proposed by the present invention;

[0021] Figure 2 A piezoelectric vibration displacement sensor proposed by the present invention Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 This is a top view of the connection between the mounting hole, the fixing groove and the insertion rod of a piezoelectric vibration displacement sensor proposed by the present invention.

[0023] In the figure: 1 two-core connector, 2 connecting wire, 3 outer shell, 4 signal conditioning circuit, 5 mass block, 6 inner shell, 7 sensitive element, 8 core body, 9 insulating plate, 10 base, 11 conductive sheet, 12 bottom plate, 13 plug rod, 14 mounting block, 15 fixing groove, 16 internal thread, 17 external thread, 18 threaded sleeve, 19 screw rod, 20 abutment plate, 21 sleeve, 22 spring, 23 connecting plate, 24 slide rod, 25 mounting plate, 26 mounting bolt, 27 abutment hole, 28 positioning groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-3A piezoelectric vibration displacement sensor, a piezoelectric vibration displacement sensor, comprises a two-core connector 1, the bottom of the two-core connector 1 is fixedly connected with a shell 3, the inside of the shell 3 is fixedly connected with a signal conditioning circuit 4, the top of the signal conditioning circuit 4 is electrically connected to the two-core connector 1 through a connecting line 2, the bottom of the signal conditioning circuit 4 is fixedly connected with an inner shell 6, the inside of the inner shell 6 is fixedly connected with a mass block 5, the inner side of the mass block 5 is fixedly connected with a sensitive element 7, the bottom of the inner shell 6 is fixedly connected with a core 8, the bottom of the core 8 is fixedly connected with an insulating plate 9, the bottom of the shell 3 is fixedly connected with a base 10, the top of the mass block 5 is fixedly connected with a conductive sheet 11, the top of the conductive sheet 11 is fixedly connected to the bottom of the signal conditioning circuit 4, the insulating The bottom of the plate 9 is fixedly connected to the top of the inner side of the base 10, the bottom of the base 10 is fixedly connected to the bottom of the base 10, the bottom of the bottom plate 12 is fixedly connected to the plug rod 13, the outer surface of the plug rod 13 is movably connected to the mounting block 14, and a fixing groove 15 is provided inside the mounting block 14. The fixing groove 15 is elliptical, and the fixing groove 15 is inclined, and the inclination direction is inclined from bottom to top to the right side based on the vertical line. The top on the left side of the fixing groove 15 and the bottom on the right side are fixedly connected with an internal thread 16, and the top on the left side of the plug rod 13 and the bottom on the right side are fixedly connected with an external thread 17, and the external thread 17 is meshed with the internal thread 16. The left and right ends of the top of the mounting block 14 are meshed with a threaded sleeve 18, and the inner side of the threaded sleeve 18 is threadedly connected with a screw 19, and the outer surface of the screw 19 A rotating disk is fixedly connected, and two threaded sleeves 18 are respectively located at the left and right ends of the top of the fixed groove 15. A threaded groove is opened on the inner side of the threaded sleeve 18, and the threaded groove is adapted to the thread on the outer surface of the screw 19. An abutment plate 20 is fixedly connected to the top of the screw 19, and a sleeve 21 is fixedly connected to the bottom of the fixed groove 15. A spring 22 is fixedly connected to the bottom of the inner cavity of the sleeve 21. A connecting plate 23 is fixedly connected to the top of the spring 22. A sliding rod 24 is fixedly connected to the top of the connecting plate 23. The outer side of the connecting plate 23 is slidably connected to the inner wall of the sleeve 21. The top of the sliding rod 24 penetrates and extends to the outside of the sleeve 21 and is slidably connected to the sleeve 21. A mounting plate 25 is fixedly connected to the bottom of the mounting block 14, and mounting bolts 2 are movably connected to the top of the mounting plate 25. 6. Abutment holes 27 are provided at both left and right ends of the bottom of the bottom plate 12. The abutment plate 20 is located inside the abutment hole 27, and the abutment plate 20 and the abutment hole 27 abut against each other. A positioning groove 28 is provided at the bottom of the insertion rod 13. The positioning groove 28 is a semicircular positioning groove. The mounting block 14 is a cylindrical shape with an internal groove. A roller is fixedly connected to the top of the sliding rod 24. The upper part of the roller is located inside the positioning groove 28 and is slidably connected to the positioning groove 28. The external thread 17 is engaged with the internal thread 16 to limit the upper and lower positions of the insertion rod 13. At the same time, the abutment plate 20 abuts against the abutment hole 27 and applies an abutment force upward. The spring 22 applies an elastic force upward and abuts the insertion rod 13 to limit the left and right positions of the insertion rod 13. When disassembly is required, the rotating disk is twisted.The screw rod 19 is driven to move downward until the bottom of the rotating disk fits with the top of the threaded sleeve 18, reducing the height of the screw rod 19, and then the insertion rod 13 is tilted to the right, so that the external thread 17 and the internal thread 16 are no longer meshed, and the insertion rod 13 is moved upward to achieve the separation between the insertion rod 13 and the mounting block 14. When it needs to be installed, the insertion rod 13 is inserted into the fixing groove 15 in an inclined state, and the bottom of the insertion rod 13 contacts the roller, and then the insertion rod 13 is gradually pushed into a vertical state, so that the roller moves into the positioning groove 28, and the external thread 17 is meshed with the internal thread 16, and then the rotating disk is rotated so that the abutment plate 20 is in the abutment hole 27, and the entire installation process is completed. The device is not only easy to disassemble and assemble, but also does not require external tools for auxiliary disassembly and assembly, which saves time and effort and is convenient for positioning. The displacement sensor can be repaired and the operation is simple, which is suitable for various situations. The sensitive element 7 is fixed on the core 8 by the mass block 5 through the external compression screw and the compression nut. The mass block 5 and the sensitive element 7 are connected by the conductive sheet 11, and a pre-tightening force of 150Kg is applied to form a sensitive component assembly. The sensitive component assembly and the inner shell 6 are tightened with epoxy glue and isolated from the base 10 by an insulating plate 9, and bonded with high-temperature glue. The signal conditioning circuit 4 is fixed on the inner shell 6 and connected to the sensitive component assembly with enameled wire. The two-core connector 1 is connected to the signal conditioning circuit 4 through the connecting wire 2 and fixed to the base 10 by laser welding, thereby realizing the assembly of the displacement sensor. The displacement sensor is simple and fast to assemble, the components are reasonably distributed, and the structure is simple, the cost is low, and it is easy for users to use.

[0026] In summary, the piezoelectric vibration displacement sensor achieves the limitation of the upper and lower positions of the insertion rod 13 by meshing the external thread 17 with the internal thread 16. At the same time, the abutment plate 20 and the abutment hole 27 abut against each other and apply an abutment force upward, and the spring 22 applies an elastic force upward and abuts the insertion rod 13 to achieve the limitation of the left and right positions of the insertion rod 13. When disassembly is required, the rotating disk is twisted and the screw rod 19 is driven to move downward until the bottom of the rotating disk fits with the top of the threaded sleeve 18, thereby lowering the height of the screw rod 19, and then the insertion rod 13 is tilted to the right, so that the external thread 17 and the internal thread 16 are no longer meshed, and move upward. The insertion rod 13 can realize the separation between the insertion rod 13 and the mounting block 14. When installation is required, the insertion rod 13 is inserted into the fixing groove 15 in an inclined state, and the bottom of the insertion rod 13 contacts the roller. Then the insertion rod 13 is gradually pushed into a vertical state, so that the roller moves into the positioning groove 28, and the external thread 17 is engaged with the internal thread 16. Then the rotating disk is rotated so that the abutment plate 20 is in the abutment hole 27, and the whole installation process is completed. The device is not only easy to disassemble and assemble, but also does not require external tools for auxiliary disassembly and assembly, which saves time and effort, is convenient for repairing the displacement sensor, and is simple to operate and suitable for various situations.

[0027] In addition, the sensitive element 7 is fixed on the core 8 through the mass block 5 by an external compression screw and a compression nut. The mass block 5 and the sensitive element 7 are connected by a conductive sheet 11, and a pre-tightening force of 150 kg is applied to form a sensitive component assembly. The sensitive component assembly and the inner shell 6 are tightened with epoxy glue and isolated from the base 10 by an insulating plate 9, and bonded with high-temperature glue. The signal conditioning circuit 4 is fixed on the inner shell 6 and connected to the sensitive component assembly with enameled wire. The two-core connector 1 is connected to the signal conditioning circuit 4 through the connecting wire 2 and fixed to the base 10 by laser welding, thereby realizing the assembly of the displacement sensor. The displacement sensor is simple and fast to assemble, the components are reasonably distributed, and the structure is simple, the cost is low, and it is easy for users to use. It solves the problem that fixing by bolts not only requires external tools for auxiliary disassembly and assembly during disassembly and assembly, but also is time-consuming and labor-intensive, and is not convenient for repairing and replacing the displacement sensor, affecting its use efficiency.

[0028] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A piezoelectric vibration displacement sensor, comprising a two-core connector (1), characterized in that: The bottom of the two-core connector (1) is fixedly connected to a shell (3), the interior of the shell (3) is fixedly connected to a signal conditioning circuit (4), the top of the signal conditioning circuit (4) is electrically connected to the two-core connector (1) via a connecting line (2), the bottom of the signal conditioning circuit (4) is fixedly connected to an inner shell (6), the interior of the inner shell (6) is fixedly connected to a mass block (5), the inner side of the mass block (5) is fixedly connected to a sensitive element (7), the bottom of the inner shell (6) is fixedly connected to a core (8), the bottom of the core (8) is fixedly connected to an insulating plate (9), and the bottom of the shell (3) is fixedly connected to a base. (10), the top of the mass block (5) is fixedly connected with a conductive sheet (11), the bottom of the base (10) is fixedly connected with a bottom plate (12), the bottom of the bottom plate (12) is fixedly connected with an insertion rod (13), the outer surface of the insertion rod (13) is movably connected with a mounting block (14), a fixing groove (15) is provided inside the mounting block (14), the top of the left side and the bottom of the right side of the fixing groove (15) are fixedly connected with an internal thread (16), the top of the left side and the bottom of the right side of the insertion rod (13) are fixedly connected with an external thread (17), the external thread (17) is meshed with the internal thread (16), and the mounting block The left and right ends of the top of the (14) are meshed with threaded sleeves (18), the inner side of the threaded sleeve (18) is threadedly connected with a screw rod (19), the top of the screw rod (19) is fixedly connected with an abutment plate (20), the bottom of the fixing groove (15) is fixedly connected with a sleeve (21), the bottom of the inner cavity of the sleeve (21) is fixedly connected with a spring (22), the top of the spring (22) is fixedly connected with a connecting plate (23), the top of the connecting plate (23) is fixedly connected with a slide rod (24), the bottom of the mounting block (14) is fixedly connected with a mounting plate (25), and the top of the mounting plate (25) is movably connected with mounting screws. The bottom of the bottom plate (12) is provided with abutment holes (27) at both left and right ends, the bottom of the insertion rod (13) is provided with a positioning groove (28), the top of the sliding rod (24) is fixedly connected with a roller, the upper part of the roller is located inside the positioning groove (28) and is slidably connected with the positioning groove (28), the outer surface of the screw rod (19) is fixedly connected with a rotating disk, the two threaded sleeves (18) are respectively located at the left and right ends of the top of the fixing groove (15), the top of the conductive sheet (11) is fixedly connected with the bottom of the signal conditioning circuit (4), and the bottom of the insulating plate (9) is fixedly connected with the top of the inner side of the base (10).

2. The piezoelectric vibration displacement sensor according to claim 1, characterized in that: The fixing groove (15) is elliptical and inclined, with the inclination direction being from bottom to top and toward the right side based on the vertical line.

3. The piezoelectric vibration displacement sensor according to claim 1, characterized in that: The inner side of the threaded sleeve (18) is provided with a thread groove, and the thread groove is matched with the thread on the outer surface of the screw rod (19).

4. The piezoelectric vibration displacement sensor according to claim 1, characterized in that: The abutment plate (20) is located inside the abutment hole (27), and the abutment plate (20) and the abutment hole (27) abut against each other.

5. The piezoelectric vibration displacement sensor according to claim 1, characterized in that: The outer side of the connecting plate (23) is slidably connected to the inner wall of the sleeve (21), and the top of the sliding rod (24) penetrates and extends to the outside of the sleeve (21) and is slidably connected to the sleeve (21).

6. The piezoelectric vibration displacement sensor according to claim 1, characterized in that: The positioning groove (28) is a semicircular positioning groove, and the mounting block (14) is a cylindrical shape with a groove inside.

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