Fiber bragg grating demodulator case

Abstract

The utility model relates to the technical field of demodulator equipment, in particular to a fiber bragg grating demodulator case, which comprises a demodulator body and a case body, a channel interface is arranged on the demodulator body, the demodulator body is arranged in the case body, the channel interface is communicated to the outer side wall of the case body, a plugging mechanism corresponding to the channel interface is arranged on the case body, and the fiber bragg grating demodulator case is arranged in the case body. The plugging mechanism comprises Z-shaped pieces, limiting slots and plugging elastic pieces, the two Z-shaped pieces are correspondingly arranged at one channel interface, the two Z-shaped pieces are oppositely arranged at the two sides of the channel interface, each Z-shaped piece is provided with one limiting slot, the Z-shaped pieces are slidably arranged in the limiting slots, the plugging elastic pieces are embedded in the limiting slots, and the plugging elastic pieces are arranged in the limiting slots. The two Z-shaped pieces at the adjacent positions are pressed inwards through the blocking elastic pieces, and the channel connector is blocked through the Z-shaped pieces on the two sides. The structure is simple, the channel connector can be automatically closed through the Z-shaped piece, and the channel connector can be automatically unfolded during butt joint.

Description

Technical Field

[0001] The utility model relates to the technical field of demodulator devices, in particular to a fiber grating demodulator chassis. Background Technique

[0002] Fiber grating sensors are a type of fiber optic sensor and are widely used in fields such as structural health monitoring, temperature monitoring, and railway rockfall monitoring. Since fiber grating sensors rely on the change in the central wavelength of the reflected light to reflect the magnitude of the measured physical quantity, fiber grating sensors need to be combined with fiber grating demodulators to convert optical signals into electrical signals that can be recognized by computer systems before they can be ultimately used by people. They can be widely used in the long-term health monitoring of large structures such as bridges, dams, tunnels, oil tanks, cables, switch cabinets, and long-distance oil pipelines, and can also be used for spectral analysis related to wavelength and power, and testing of optical devices.

[0003] In the prior art, in order to prevent dust from entering the channel interface, a dust-proof sleeve is sleeved on it. However, there is still a certain exposure time during the plugging process of the channel interface, and at this time, dust is likely to enter the channel interface, thereby affecting the accuracy of the device's data analysis. At the same time, the detachable dust-proof sleeve is easily lost and dropped. After the dust-proof sleeve falls off, it will adhere to dust and finally adsorb in the channel interface. Summary of the Invention

[0004] To solve the problem that dust easily enters the channel interface and affects the accuracy of the device's data analysis, the utility model provides a fiber grating demodulator chassis, and the specific technical solution is as follows:

[0005] A fiber grating demodulator chassis includes a demodulator body. A channel interface is provided on the demodulator body. It further includes a box body. The demodulator body is arranged in the box body. The channel interface communicates with the outer side wall of the box body. A plugging mechanism corresponding to the channel interface is provided on the box body. The plugging mechanism includes a Z-shaped member, a limiting slot, and a plugging elastic piece. Two Z-shaped members are correspondingly arranged at one channel interface. The two Z-shaped members are arranged on both sides of the channel interface in an opposite manner. A limiting slot is provided at each Z-shaped member. The Z-shaped member is slidably arranged in the limiting slot. The plugging elastic piece is embedded in the limiting slot. The plugging elastic piece presses the two adjacent Z-shaped members inward, and the two Z-shaped members on both sides plug the channel interface.

[0006] Further, a guiding bevel is provided at the top of the Z-shaped member. Pressing down the guiding bevel can push the two Z-shaped members on both sides outwards.

[0007] Further, a dust removal mechanism is further provided in the box body. The dust removal mechanism includes a dust removal airbag and an air outlet. The air outlet is provided at a position on the box body close to the channel interface. The dust removal airbag communicates with the air outlet. The dust removal airbag blows the airflow through the air port to the channel interface.

[0008] Further, the air outlet is arranged on the box body and is located below the Z-shaped part. When the Z-shaped part moves to the side away from the channel interface, the air outlet is opened.

[0009] Further, an air guide groove is arranged on the side of the Z-shaped part facing the air outlet, and the air guide groove guides the gas in the air outlet to be blown to the channel interface.

[0010] Further, the dust removal mechanism further includes a pressurizing spring, and the pressurizing spring is arranged in the box body to press the dust removal airbag.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] Firstly: In this solution, a blocking mechanism is provided. The blocking mechanism includes a Z-shaped part, a limiting slot, and a blocking elastic sheet. Two Z-shaped parts are correspondingly arranged at one channel interface, and the two Z-shaped parts are arranged on both sides of the channel interface in an opposite manner. A limiting slot is arranged at each Z-shaped part, and the Z-shaped part is slidably arranged in the limiting slot. The blocking elastic sheet is embedded in the limiting slot. One end of the blocking elastic sheet abuts against the inside of the limiting slot, and the other end abuts against the Z-shaped part. The two adjacent Z-shaped parts are pressed inward by the blocking elastic sheet, and then the channel interface is blocked by the Z-shaped parts on both sides. When it is necessary to connect the fiber grating interface with the channel interface, the Z-shaped parts on both sides are separated.

[0013] Secondly: In this solution, the fiber grating interface is pressed down to the guiding bevel edge, so that the Z-shaped parts on both sides can be pushed outwards, thereby exposing the channel interface for docking with the fiber grating interface.

[0014] Thirdly: In order to prevent dust from adhering to the channel interface in this solution, a dust removal mechanism is further arranged in the box body. The dust removal mechanism includes a dust removal airbag and an air outlet. The air outlet is arranged on the box body at a position close to the channel interface. The dust removal airbag is communicated with the air outlet, and the dust removal airbag blows the air flow through the air port to the channel interface, and blows away the dust that may adhere to the channel interface through the air flow generated by the dust removal airbag. Description of the Drawings

[0015] Figure 1 is the structural schematic diagram of the present application;

[0016] Figure 2 is the cross-section Figure 1 ;

[0017] Figure 3 is the internal structural schematic diagram of the present application;

[0018] Figure 4 is the cross-section Figure 2 ;

[0019] Figure 5 isFigure 4 Schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 6 Schematic diagram of the structure of the Z-shaped part;

[0021] Figure 7 Schematic diagram of the structure of the plugging elastic piece part.

[0022] Reference numerals: demodulator body 1, channel interface 2, box body 3, plugging mechanism 4, Z-shaped part 41, air guide groove 411, limit slot 42, plugging elastic piece 43, dust removal mechanism 5, dust removal airbag 51, air outlet 52, boosting spring 53. Specific implementation mode

[0023] The present utility model will be further described below in conjunction with the accompanying drawings.

[0024] As Figures 1 to 7 shown, an optical fiber grating demodulator chassis includes a demodulator body 1. A channel interface 2 is provided on the demodulator body 1. The demodulator is used for data acquisition and analysis of the optical fiber grating sensor, and the channel interface 2 is used for data signal transmission. It further includes a box body 3. The demodulator body 1 is arranged in the box body 3. The channel interface 2 communicates with the outer side wall of the box body 3. A plugging mechanism 4 corresponding to the channel interface 2 is provided on the box body 3. The plugging mechanism 4 can plug the channel interface 2 under normal conditions to prevent dust from accumulating in the channel interface 2 and affecting the data acquisition of the demodulator body 1. The plugging mechanism 4 includes a Z-shaped part 41, a limit slot 42 and a plugging elastic piece 43. Two Z-shaped parts 41 are correspondingly arranged at one channel interface 2. The two Z-shaped parts 41 are arranged on both sides of the channel interface 2 in a facing manner. A limit slot 42 is provided at each Z-shaped part 41. The Z-shaped part 41 is slidably arranged in the limit slot 42. The plugging elastic piece 43 is embedded in the limit slot 42. One end of the plugging elastic piece 43 abuts against the inside of the limit slot 42, and the other end abuts against the Z-shaped part 41. The adjacent two Z-shaped parts 41 are pressed inward by the plugging elastic piece 43, and then the channel interface 2 is plugged by the two Z-shaped parts 41 on both sides. When the optical fiber grating interface needs to be connected to the channel interface 2, the two Z-shaped parts 41 on both sides are separated.

[0025] Furthermore, a guiding bevel is provided at the top of the Z-shaped part 41. During use, the optical fiber grating interface is directly pressed down to the guiding bevel, so that the two Z-shaped parts 41 on both sides can be pushed outwards, thereby exposing the channel interface 2 for docking with the optical fiber grating interface.

[0026] To further prevent dust from adhering to the channel interface 2, a dust removal mechanism 5 is also provided inside the box body 3. The dust removal mechanism 5 includes a dust removal airbag 51 and an air outlet 52. The air outlet 52 is arranged on the box body 3 at a position close to the channel interface 2. The dust removal airbag 51 is communicated with the air outlet 52. The dust removal airbag 51 blows the air flow through the air port to the channel interface 2, and blows away the dust that may adhere to the channel interface 2 through the air flow generated by the dust removal airbag 51.

[0027] To further control the conveying state of the dust removal airbag 51, the air outlet 52 is arranged on the box body 3 and is located below the Z-shaped part 41. When the Z-shaped part 41 moves to the side away from the channel interface 2, the air outlet 52 is opened. When the channel interface 2 is not in the connected state, the two Z-shaped parts 41 are in the position close to each other. At this time, the Z-shaped part 41 blocks the air outlet 52. When the fiber Bragg grating interface is inserted into the channel interface 2, the two Z-shaped parts 41 move outward. At this time, the Z-shaped part 41 loses the block of the air outlet 52, and the dust removal airbag 51 outputs air flow to disperse the dust at the channel interface 2, thereby preventing dust adsorption during the insertion and removal of the channel interface 2.

[0028] Preferably, a gas guiding groove 411 is arranged on the side of the Z-shaped part 41 facing the air outlet 52. The gas guiding groove 411 guides the gas in the air outlet 52 to the channel interface 2. By arranging the gas guiding groove 411, the gas output by the dust removal airbag 51 can be further guided, so that the air flow is evenly blown to the channel interface 2, so as to improve the dust removal coverage area and efficiency.

[0029] When the air pressure in the dust removal airbag 51 decreases, it will cause insufficient air supply, thus affecting the dust removal efficiency of the dust removal mechanism 5. A pressure increasing spring 53 is also arranged in the dust removal mechanism 5. The pressure increasing spring 53 is arranged inside the box body 3 to press the dust removal airbag 51, and the air pressure in the dust removal airbag 51 can be balanced through the pressure increasing spring 53.

[0030] In another embodiment, the pressure increasing spring 53 is replaced by a pressure increasing electric cylinder, so that the pressure generated by the pressure increasing cylinder can be controlled according to the current air pressure in the dust removal airbag 51, thereby further balancing the gas delivery balance of the pressure increasing airbag.

[0031] In another embodiment, the dust removal airbag 51 in this solution can adopt an air tank, and high-pressure compressed gas is filled in the air tank, so as to provide a longer dust removal time limit.

[0032] Optionally, the dust removal airbag 51 in this solution adopts a replaceable structure. When the gas in a single dust removal airbag 51 is exhausted, a new dust removal airbag 51 can be replaced, or the dust removal airbag 51 can be inflated through an inflation device.

[0033] It is conceivable that, in this solution, an air outlet valve may be provided between the air bag and the air outlet 52, so as to control the air outlet time and air flow size of the air bag.

[0034] When in use in this solution, the staff inserts the fiber grating interface into the corresponding channel interface 2 according to needs, and the fiber grating interface contacts the Z-shaped parts 41 on both sides to make them open to both sides. At the same time, the air outlet 52 is unfolded when the Z-shaped part 41 is moved away, and the air flow generated by the dust removal airbag 51 is blown to the channel interface 2 through the air outlet 52 to prevent dust from entering the channel interface 2 when the channel interface 2 is exposed. After completing data collection and analysis, the fiber grating interface is pulled out, and at this time, the Z-shaped parts 41 on both sides are pushed onto the channel interface 2 through the sealing spring piece 43 to seal it again, and the air outlet 52 is blocked at the same time.

[0035] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the claims of the present invention.

Claims

1. A fiber Bragg grating demodulator chassis, comprising a demodulator body (1), the demodulator body (1) being provided with a channel interface (2), characterized in that: The invention also comprises a box body (3), wherein the demodulator body (1) is arranged in the box body (3), the channel interface (2) is connected to the outer wall of the box body (3), and a blocking mechanism (4) corresponding to the channel interface (2) is arranged on the box body (3), wherein the blocking mechanism (4) comprises a Z-shaped piece (41), a limiting slot (42) and a blocking spring piece (43), wherein two Z-shaped pieces (41) are correspondingly arranged at one channel interface (2), the two Z-shaped pieces (41) are arranged on opposite sides of the channel interface (2), and each Z-shaped piece (41) is provided with a limiting slot (42), the Z-shaped piece (41) is slidably arranged in the limiting slot (42), and the blocking spring piece (43) is embedded in the limiting slot (42), and the blocking spring piece (43) presses two Z-shaped pieces (41) at adjacent positions inwardly, so that the Z-shaped pieces (41) on both sides block the channel interface (2).

2. The fiber Bragg grating demodulator chassis according to claim 1, characterized in that: A guiding bevel is provided on the top of the Z-shaped piece (41), and pressing down the guiding bevel can push the Z-shaped pieces (41) on both sides outwards.

3. The fiber Bragg grating demodulator chassis according to claim 1, characterized in that: A dust removal mechanism (5) is also provided in the box body (3), the dust removal mechanism (5) comprising a dust removal airbag (51) and an air outlet (52), the air outlet (52) being provided on the box body (3) at a position close to the channel interface (2), the dust removal airbag (51) being connected to the air outlet (52), and the dust removal airbag (51) blowing airflow to the channel interface (2) through the air outlet.

4. The fiber Bragg grating demodulator chassis according to claim 3, characterized in that: The air outlet (52) is arranged on the box body (3) and is located below the Z-shaped member (41). The Z-shaped member (41) moves to a side of the air outlet (52) away from the channel interface (2) and opens.

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