Vibrating wire sensor

Abstract

The utility model discloses a vibrating wire sensor, which comprises a sensor shell, a detection head and a sensor base, the detection head and the sensor base are respectively mounted at two ends of the sensor shell, the sensor shell comprises a shell and a vibrating wire shell mounted in the shell, and an adjusting seat is mounted at one end of the vibrating wire shell. The side, located outside the vibrating string shell, of the adjusting base is connected with a connecting plug, the side, located inside the vibrating string shell, of the adjusting base is connected with a first string base, the other end of the vibrating string shell is provided with a fixing base, the side, located inside the vibrating string shell, of the fixing base is connected with a second string base, and a string wire is connected between the first string base and the second string base. The detection head is rotated to enable the connecting plug clamped with the internal connecting plug to drive the adjusting seat to rotate, so that the adjusting seat is located at one end of the vibrating string shell for adjustment, the string wire is pulled out through the first string seat, and the string wire is tensioned after long-time use or loosening between the string wire and the first string seat. And the accuracy of the vibrating wire sensor after long-time use is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a vibrating string sensor. Background Art

[0002] The vibrating string sensor is a resonant sensor that uses a stretched metal string as a sensitive element. Once the length of the string is determined, the change in its natural vibration frequency can represent the magnitude of the tension on the string. Through the corresponding measurement circuit, an electrical signal that is in a certain relationship with the tension can be obtained.

[0003] However, due to process and material reasons, the vibrating string sensor will inevitably produce steel string relaxation, which will cause measurement errors. The relaxation of the steel string is mainly reflected in two aspects: one is the relaxation caused by the anchoring end of the steel string, and the other is the relaxation caused by the material properties of the steel string itself. Utility Model Content

[0004] The utility model aims to solve the problem that the vibrating wire sensor in the prior art will inevitably produce steel wire relaxation, thereby causing measurement errors, and proposes the following technical solutions:

[0005] A vibrating string sensor comprises: a sensor housing, and a detection head and a sensor base respectively mounted at two ends of the sensor housing.

[0006] The sensor housing comprises a housing, and a vibrating string housing installed inside the housing, an adjusting seat installed at one end of the vibrating string housing, a plug connector connected to a side of the adjusting seat located outside the vibrating string housing, a first string seat connected to a side of the adjusting seat located inside the vibrating string housing, a fixing seat installed at the other end of the vibrating string housing, a second string seat connected to a side of the fixing seat located inside the vibrating string housing, and a string wire connected between the first string seat and the second string seat;

[0007] The detection head comprises a mounting shell and a detection seat clamped inside the mounting shell, and one side of the detection seat is connected with a plug socket.

[0008] As an improvement of the above technical solution, the adjustment seat and the vibration string housing are arranged to be threadedly connected, and the plug connector is plugged into the plug socket for clamping.

[0009] As an improvement of the above technical solution, a limiting edge is provided on the surface of one end of the mounting shell, and a limiting groove is provided on the inner wall of one end of the shell. The mounting shell is fixed in the limiting groove at one end of the shell by the limiting edge and can rotate.

[0010] As an improvement of the above technical solution, a magnet is fixedly installed inside the vibrating string shell, and a vibrating string body is installed at a position on the surface of the string corresponding to the magnet.

[0011] As an improvement of the above technical solution, one end of the sensor base is further connected to a cable connector, and a cable is installed inside the cable connector.

[0012] Beneficial effects of the utility model:

[0013] The detection head is rotated to make the plug connector connected to the internal plug seat drive the adjustment seat to rotate, so that the adjustment seat is located at one end of the vibrating string shell for adjustment, so that the string wire is pulled out through the first string seat, and the string wire is tightened after long-term use or the looseness between the string wire and the first string seat, thereby improving the accuracy of the vibrating string sensor after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the main view of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the interior of the vibrating string housing of the utility model.

[0017] Figure numerals: 1. sensor housing; 11. shell; 12. vibrating string housing; 13. adjustment seat; 14. plug connector; 15. first string seat; 16. fixing seat; 17. second string seat; 18. string wire; 19. vibrating string body; 110. magnet; 2. detection head; 21. mounting shell; 22. detection seat; 23. plug connector; 3. sensor base; 4. cable connector; 5. cable. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution of the present utility model will be clearly and completely described below in conjunction with the embodiments.

[0019] Example

[0020] A vibrating wire sensor comprises: a sensor housing 1, and a detection head 2 and a sensor base 3 respectively mounted at two ends of the sensor housing 1, one end of the sensor base 3 is also connected to a cable connector 4, and a cable 5 is installed inside the cable connector 4;

[0021] The sensor housing 1 comprises a housing 11, and a vibrating string housing 12 installed inside the housing 11, an adjusting seat 13 installed at one end of the vibrating string housing 12, a plug connector 14 connected to a side of the adjusting seat 13 located outside the vibrating string housing 12, a first string seat 15 connected to a side of the adjusting seat 13 located inside the vibrating string housing 12, a fixing seat 16 installed at the other end of the vibrating string housing 12, a second string seat 17 connected to a side of the fixing seat 16 located inside the vibrating string housing 12, and a string wire 18 connected between the first string seat 15 and the second string seat 17;

[0022] The shell 11 can be used to install the whole body and protect it at the same time to ensure stability during use. The vibrating shell 12 installed inside can be used to install and protect the string 18 to ensure accuracy during use. The adjusting seat 13 installed inside the vibrating shell 12 can adjust the string 18 when it is loose. The fixing seat 16 can fix it and can also be removed during installation to facilitate installation of the string 18. The first string seat 15 and the second string seat 17 can tighten and fix the string 18 to improve the tension of the string 18 during operation to facilitate accuracy during detection. The plug connector 14 is connected to the side of the adjusting seat 13 located outside the vibrating shell 12 to fix it during installation and facilitate adjustment of the string 18 when it is loose.

[0023] The detection head 2 includes a mounting shell 21 and a detection seat 22 that is clamped inside the mounting shell 21, and a plug socket 23 is connected to one side of the detection seat 22;

[0024] By providing a mounting shell 21, the internally installed detection seat 22 can be installed and fixed at one end of the shell body 11, so as to facilitate detection work during use. At the same time, by connecting a plug socket 23 to one side of the detection seat 22, the plug connector 14 can be plugged and fixed, so as to facilitate installation and use. At the same time, when the string 18 is loose, it can be tightened when the detection head 2 is rotated to improve the accuracy of the detection.

[0025] In order to more conveniently adjust the tension of the string 18 during use, a threaded connection is provided between the adjustment seat 13 and the vibration string shell 12, and the plug connector 14 is plugged into the inside of the plug connector 23 for clamping. When adjusting, the plug connector 14 can be rotated to drive the adjustment seat 13 to rotate as a whole, so that the string 18 can be adjusted inward or outward, and the threaded connection can be adjusted more accurately and stably, and will not move after adjustment.

[0026] At the same time, a limiting edge is provided on the surface of one end of the mounting shell 21, and a limiting groove is provided on the inner wall of one end of the shell 11. The mounting shell 21 is fixed in the limiting groove at one end of the shell 11 by the limiting edge, and can be rotated. It can be driven during the adjustment process, and is more stable during the driving adjustment, and the mounting shell 21 will not fall off due to rotation.

[0027] In order to make the detection more accurate, a magnet 110 is fixedly installed inside the vibrating string shell 12, and a vibrating string body 19 is installed on the surface of the string 18 at a position corresponding to the magnet 110. By installing the vibrating string body 19 on the surface of the string 18, and the vibrating string body 19 is made of metal, it can be attracted by the magnet 110 after vibration during detection, so as to increase the vibration amplitude and improve the efficiency and accuracy of detection.

[0028] The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it.

Claims

1. A vibrating wire sensor, comprising: A sensor housing (1), and a detection head (2) and a sensor base (3) respectively mounted at two ends of the sensor housing (1), characterized in that: The sensor housing (1) comprises a housing (11), and a vibrating string housing (12) installed inside the housing (11); an adjusting seat (13) is installed at one end of the vibrating string housing (12); a plug connector (14) is connected to the side of the adjusting seat (13) located outside the vibrating string housing (12); a first string seat (15) is connected to the side of the adjusting seat (13) located inside the vibrating string housing (12); a fixing seat (16) is installed at the other end of the vibrating string housing (12); a second string seat (17) is connected to the side of the fixing seat (16) located inside the vibrating string housing (12); a string wire (18) is connected between the first string seat (15) and the second string seat (17); The detection head (2) comprises a mounting shell (21) and a detection seat (22) clamped inside the mounting shell (21), and a plug socket (23) is connected to one side of the detection seat (22).

2. A vibrating wire sensor according to claim 1, characterized in that: The adjustment seat (13) and the vibrating string housing (12) are arranged to be threadedly connected, and the plug connector (14) is plugged into the plug connector (23) for clamping.

3. A vibrating wire sensor according to claim 1, characterized in that: A limiting edge is provided on the surface of one end of the mounting shell (21), and a limiting groove is provided on the inner wall of one end of the shell (11). The mounting shell (21) is fixed inside the limiting groove at one end of the shell (11) by means of the limiting edge and can rotate.

4. A vibrating wire sensor according to claim 1, characterized in that: A magnet (110) is also fixedly mounted inside the vibrating string housing (12), and a vibrating string body (19) is mounted on the surface of the string (18) at a position corresponding to the magnet (110).

5. A vibrating wire sensor according to claim 1, characterized in that: One end of the sensor base (3) is also connected to a cable connector (4), and a cable (5) is installed inside the cable connector (4).

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