A fixing device for side-view through-beam optical fiber sensor

Abstract

The utility model relates to the technical field of detection and measurement devices, and specifically to a fixing device for a side-view through-beam optical fiber sensor. A fixing device for a side-view through-beam optical fiber sensor, the fixing device comprising a sensor holder and a sensor protection bar, the sensor holder adopts a transverse fixing hole to solve the problem that the through-beam optical fiber sensor is relatively slender, small in size, and has a smooth tube wall, and is prone to deformation, sliding, and rotation during fixation and use; the sensor protection bar solves the problem that the end of the side-view through-beam optical fiber sensor is prone to contact with the surface of a hard material, causing the through-beam optical fiber sensor to be scratched or even broken.

Description

Technical Field

[0001] The utility model relates to the technical field of detection and measurement devices, in particular to a fixing device for a side-view through-beam optical fiber sensor. Background Art

[0002] Optical fiber sensors are commonly used sensors that adjust the operating status of equipment by the intensity of the incident light. The use of the incident optical fiber sensor is to install two detectors facing each other. Whether the two detectors can accurately form a reflection is one of the important conditions for the accuracy and sensitivity of the sensor. Ordinary incident optical fiber sensors only need to ensure that the sensor receiving and transmitting ends are on the same straight line, which is relatively simple; side-view incident optical fiber sensors have higher requirements for the fixed angles of the sensor receiving and transmitting ends due to the side light emission technology. In order to reduce interference with the monitored object, the commonly used side-view incident optical fiber sensors are mostly slender, small in size, and have smooth tube walls. They are prone to deformation, sliding, and rotation during fixation and use, and the accurate reflection of the sensor receiving and transmitting ends is very difficult; in addition, the sensor is easy to contact the surface of hard materials during use, resulting in scratches or even breakage of the sensor. JP2000131553A provides a fixing device for an optical fiber sensor, which is used to fix the cable end of an optical fiber cable used for an optical fiber sensor to prevent the optical axis from deviating due to the loosening of the side-view lens. The existing patents still make it easy for the side-view through-beam optical fiber sensor to slip and rotate when fixed and used, and the end of the sensor is easily scratched or even broken during use. The inventor believes that there is still much room for improvement. Utility Model Content

[0003] The design purpose of the utility model is to solve the problem that the side-view through-beam optical fiber sensor is relatively slender, small in size, and has a smooth tube wall, which is prone to deformation, sliding, and rotation during fixation and use; the side-view through-beam optical fiber sensor has high requirements for the fixing angle of the sending and receiving ends due to the side light emission technology; and the end of the side-view through-beam optical fiber sensor is easy to contact the surface of hard materials during use, causing the side-view through-beam optical fiber sensor to be scratched or even broken. The utility model provides a fixing device for a side-view through-beam optical fiber sensor, the fixing device includes a sensor holder and a sensor protection bar, the sensor holder is provided with at least two types of through holes, the first type of through holes allows the side-view through-beam optical fiber sensor to pass through, and the second type of through holes allows the sensor protection bar to pass through; each through hole of the first type of through holes is provided with a fixing structure, the fixing structure fixes the side-view through-beam optical fiber sensor, and the first type of through holes are symmetrically arranged in pairs on the sensor holder. The utility model adopts a sensor holder to pre-fix a pair of side-view through-beam fiber optic sensors to the first type of through holes, and sets the sending angle of the sending end and the receiving angle of the receiving end, thereby avoiding the need to adjust the side-view through-beam fiber optic sensors after installation; adopts a sensor holder to fix one or more groups of through-beam fiber optic sensors, thereby solving the problem that it is difficult to fix the side-view through-beam fiber optic sensors individually and they are prone to sliding and rotating during use; adopts a sensor protection bar, the extended length of the sensor protection bar is longer than the extended length of the side-view through-beam fiber optic sensor, and when the fixing device is installed, the sensor protection bar always touches the hard medium surface before the end of the side-view through-beam fiber optic sensor, thereby avoiding the end of the side-view through-beam fiber optic sensor directly touching the hard medium surface and causing friction damage or even breakage.

[0004] Preferably, the sensor holder is provided with a holder center hole, and the first type through holes and the second type through holes are symmetrically arranged on both sides of the holder center hole. The side-view through-beam optical fiber sensors need to be symmetrically arranged in pairs so that the detection areas correspond to each other.

[0005] Preferably, the fixing device further comprises a lifting device connecting shaft, a lifting device connecting shaft is provided at the fixing center hole of the sensor fixing device, and the sensor fixing device is fixed on the lifting device connecting shaft. The lifting device connecting shaft facilitates the up and down movement of the detection position and the avoidance position of the side-viewing through-beam optical fiber sensor, avoiding the need to remove and re-fix the side-viewing through-beam optical fiber sensor.

[0006] Preferably, the lifting device connecting shaft is a threaded rod, and the lifting device connecting shaft passes through the sensor holder through the center hole. One end of the lifting device connecting shaft passes through the sensor holder, and a pair of nuts are sleeved on the lifting device connecting shaft to fix the sensor holder on both sides.

[0007] Preferably, the fixing structure includes a transverse fixing hole intersecting with the first type of through hole, one end of the transverse fixing hole is the first type of through hole, and the other end is the outer wall of the sensor holder. The transverse fixing hole intersects with the first type of through hole, and a fixing piece is inserted into the transverse fixing hole to fix the side-viewing through-fiber sensor in the first type of through hole to prevent the side-viewing through-fiber sensor from rotating and sliding.

[0008] Preferably, the fixing structure includes a fixing bolt, and the transverse fixing hole is a threaded hole, and the side-viewing through-beam optical fiber sensor is fixed through the transverse fixing hole. The fixing bolt and the threaded hole cooperate with each other to control the screw-in depth of the fixing bolt, apply a clamping force to the side-viewing through-beam optical fiber sensor, and can be used to fix different models of side-viewing through-beam optical fiber sensors.

[0009] Preferably, the lifting device connecting shaft is provided with a sensor protection sleeve, and the sensor protection sleeve is located above the sensor holder. The side-view through-beam optical fiber sensor has a lead wire, and the sensor protection sleeve provides a lead-out channel for the lead wire of the side-view through-beam optical fiber sensor and protects the lead wire.

[0010] The utility model has the following beneficial effects: a pair of side-view through-beam optical fiber sensors are pre-fixed in the first type of through holes by using a sensor holder, and the sending angle of the sending end and the receiving angle of the receiving end are set, thereby avoiding the need to adjust the side-view through-beam optical fiber sensors after installation; a sensor holder is used to fix one or more groups of through-beam optical fiber sensors, thereby solving the problem that it is difficult to fix the through-beam optical fiber sensors individually and they are prone to sliding and rotating during use; a sensor protection bar is used, and the extended length of the sensor protection bar is longer than that of the through-beam optical fiber sensor, thereby avoiding the through-beam optical fiber sensor from directly touching the surface of a hard medium and being damaged by friction or even broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the fixing device of the side-view through-beam optical fiber sensor of the utility model;

[0012] Figure 2 It is a structural schematic diagram of the sensor holder of the utility model;

[0013] Figure 3 It is a schematic diagram of the internal structure of the utility model.

[0014] Explanation of reference numerals: 1 sensor holder; 2 sensor protection sleeve; 3 side-view optical fiber sensor; 4 sensor protection bar; 101 center hole; 102 first type through hole; 103 transverse fixing hole; 104 second type through hole; 201 lifting device connecting shaft; 202 lead wire; 203 first nut; 204 second nut. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0016] Embodiment 1

[0017] like Figure 1 As shown, in this embodiment, a fixing device for a side-view through-beam optical fiber sensor 3 is provided, the fixing device comprises a sensor holder 1, a sensor protection sleeve 2, a sensor protection bar 4 and a side-view through-beam optical fiber sensor 3, the sensor holder 1 is provided with four through holes, two of which are first-type through holes 102, the first-type through holes 102 allow the side-view through-beam optical fiber sensor 3 to pass through, and the other two through holes are second-type through holes 104, the second-type through holes 104 allow the sensor protection bar 4 to pass through; each of the first-type through holes 102 is provided with a fixing structure, the fixing structure fixes the side-view through-beam optical fiber sensor 3, and the first-type through holes 102 are symmetrically arranged in pairs on the sensor holder 1. In this embodiment, the second-type through holes 104 are provided with the same fixing structure as the first-type through holes 102.

[0018] Through the above arrangement, a pair of side-view through-beam optical fiber sensors 3 are pre-fixed in the first type of through holes 102 by using a sensor holder 1, and the sending angle of the sending end and the receiving angle of the receiving end are set, so as to avoid the need to adjust the side-view through-beam optical fiber sensors 3 after installation; the sensor holder 1 is used to fix one or more groups of through-beam optical fiber sensors, so as to solve the problem that it is difficult to fix the side-view through-beam optical fiber sensors 3 individually, and they are prone to sliding and rotating during use; a sensor protection bar 4 is used, and the extended length of the sensor protection bar 4 is 3 mm longer than the extended length of the side-view through-beam optical fiber sensor 3. When the fixing device is installed, the sensor protection bar 4 always touches the hard medium surface before the end of the side-view through-beam optical fiber sensor 3, so as to avoid the end of the side-view through-beam optical fiber sensor 3 directly touching the hard medium surface and causing friction damage or even breakage.

[0019] Combination Figure 1 and Figure 2As shown, the sensor holder 1 is provided with a holder center hole 101 and four through holes arranged at equal angles in a circle. The center hole 101 has a diameter of 3.6 mm and vertically penetrates the sensor holder. The through holes include two first-type through holes 102 and two second-type through holes 104. The first-type through holes 102 and the second-type through holes 104 are symmetrically arranged on both sides of the holder center hole 101. The diameter of the first-type through holes 102 is 1 mm, and the diameter of the second-type through holes 104 is 2 mm. With the above arrangement, the symmetrical arrangement of the first-type through holes 102 enables the side-viewing through-beam optical fiber sensor 3 to be symmetrically arranged. After the side-viewing through-beam optical fiber sensor 3 is inserted into the sensor holder 1, the side-viewing through-beam optical fiber sensor 3 is adjusted so that the detection areas of the side-viewing through-beam optical fiber sensor 3 correspond to each other. Sensor protection bars 4 are provided on both sides of the sensor holder 1, which are conducive to preventing the end of the side-viewing through-beam optical fiber sensor 3 on one side from contacting the hard medium below due to the tilt of the fixing device during the lowering process of the fixing device.

[0020] Combination Figure 1 and Figure 2 As shown, the fixing device further includes a lifting device connecting shaft 201, and the lifting device connecting shaft 201 is provided at the fixing center hole 101 of the sensor fixing device 1, and the sensor fixing device 1 is fixed on the lifting device connecting shaft 201. The lifting device connecting shaft 201 controls the overall upward and downward movement of the fixing device. The lifting device connecting shaft 201 facilitates the upward and downward movement of the detection position and the avoidance position of the side-viewing through-beam optical fiber sensor 3, avoiding the need to remove and re-fix the side-viewing through-beam optical fiber sensor 3.

[0021] Combination Figure 1 and Figure 3 As shown, the lifting device connecting shaft 201 is a threaded rod, and the lifting device connecting shaft 201 passes through the sensor holder 1 through the center hole 101. One end of the lifting device connecting shaft 201 passes through the sensor holder 1, and the first nut 203 and the second nut 204 are sleeved on the lifting device connecting shaft 201 to fix the sensor holder 1 on both sides.

[0022] like Figure 2As shown, the fixing structure includes a transverse fixing hole 103 intersecting with the first type through hole 102, one end of the transverse fixing hole 103 is the first type through hole 102, and the other end is the outer wall of the sensor holder 1. The transverse fixing hole 103 intersects with the first type through hole 102, and the transverse fixing hole 103 is used to insert a fixing member to fix the side-viewing optical fiber sensor 3 in the first type through hole 102 to prevent the side-viewing optical fiber sensor 3 from rotating and sliding. The fixing member can be a bolt, a pin or other fastener that prevents the side-viewing optical fiber sensor 3 from sliding and rotating. Similarly, the second type through hole 104 is provided with the same fixing structure as the first type through hole 102, and a transverse fixing hole intersecting with the second type through hole 104 is used, and a fixing member is inserted into the transverse fixing hole. When the extended length of the sensor protection bar 4 is greater than the extended length of the side-viewing optical fiber sensor 3 by 3 mm, the sensor protection bar 4 is fixed.

[0023] In this embodiment, the fastener is a fixing bolt, and the transverse fixing hole 103 is a threaded hole, and the side-viewing through-beam optical fiber sensor 3 is fixed through the transverse fixing hole 103. The fixing bolt and the threaded hole cooperate with each other to apply a clamping force to the side-viewing through-beam optical fiber sensor 3, and control the screw-in depth of the fixing bolt, so as to fix different types of side-viewing through-beam optical fiber sensors 3.

[0024] like Figure 3 As shown, the lifting device connecting shaft 201 is covered with a sensor protection sleeve 2, and the sensor protection sleeve 2 is located above the sensor holder 1. The side-view through-beam optical fiber sensor 3 has a lead wire 202, and the sensor protection sleeve 2 provides a lead-out channel for the lead wire 202 of the side-view through-beam optical fiber sensor 3 and protects the lead wire 202.

[0025] Embodiment 2

[0026] Different from the first embodiment, in this embodiment, the sensor protection bar 4 is a threaded bar, and the second type of through hole 104 is a threaded hole. The sensor protection bar 4 is screwed into the second type of through hole until the sensor protection bar 4 extends out of the other end of the sensor holder 1 to a length greater than the extension length of the side-viewing optical fiber sensor 3 by 2 mm. The bottom of the sensor protection bar 4 is wrapped with elastic material, which is rubber in this embodiment, which is beneficial to prevent the end of the side-viewing optical fiber sensor 3 from contacting the hard medium below due to the tilt of the fixing device during the lowering process of the fixing device. Compared with the fixing method of the sensor protection bar 4 in the first embodiment, the second embodiment is beneficial to adjust the extension length of the sensor protection bar 4 and can better adapt to the detection environment. Rubber is provided at the bottom of the sensor protection bar 4 to prevent the sensor protection bar 4 from colliding with the hard medium below, causing damage to the hard medium below, and to absorb the vibration of the fixing device caused by the impact, so as to prevent the side-viewing optical fiber sensor 3 from shifting due to the impact vibration.

[0027] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A fixing device for a side-view through-beam optical fiber sensor, characterized in that: The fixing device comprises a sensor fixing device (1) and a sensor protection bar (4); the sensor fixing device (1) comprises a first type through hole (102) and a second type through hole (104); the first type through hole (102) allows the side-viewing optical fiber sensor (3) to pass through, and the second type through hole (104) allows the sensor protection bar (4) to pass through.

2. A fixing device for a side-view through-beam optical fiber sensor according to claim 1, characterized in that: The first type of through holes (102) are symmetrically arranged in pairs on the sensor holder (1), and each of the first type of through holes (102) is provided with a fixing structure, and the fixing structure fixes the side-view through-beam optical fiber sensor (3).

3. A fixing device for a side-view through-beam optical fiber sensor according to claim 2, characterized in that: The sensor holder (1) is provided with a holder central hole (101), and the first type of through holes (102) and the second type of through holes (104) are symmetrically arranged on both sides of the holder central hole (101).

4. A fixing device for a side-view through-beam optical fiber sensor according to claim 3, characterized in that: The fixing device further comprises a lifting device connecting shaft (201), a lifting device connecting shaft (201) is provided at a fixing center hole (101) of the sensor fixing device (1), and the sensor fixing device (1) is fixed on the lifting device connecting shaft (201).

5. A fixing device for a side-view through-beam optical fiber sensor according to claim 4, characterized in that: The lifting device connecting shaft (201) is a threaded rod, and the lifting device connecting shaft (201) passes through the sensor holder (1) via a central hole (101).

6. A fixing device for a side-view through-beam optical fiber sensor according to claim 4 or 5, characterized in that: The fixing structure comprises a transverse fixing hole (103) intersecting with the first type of through hole (102), one end of the transverse fixing hole (103) being the first type of through hole (102) and the other end being the outer wall of the sensor holder (1).

7. A fixing device for a side-view through-beam optical fiber sensor according to claim 6, characterized in that: The fixing structure comprises a fixing bolt, the transverse fixing hole (103) is a threaded hole, and the fixing bolt fixes the side-viewing optical fiber sensor (3) through the transverse fixing hole (103).

8. A fixing device for a side-view through-beam optical fiber sensor (3) according to claim 6, characterized in that: The lifting device connecting shaft (201) is covered with a sensor protection sleeve (2), and the sensor protection sleeve (2) is located above the sensor holder (1).

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