CN207147690U - Optical fiber pressure measurement sensor - Google Patents

Abstract

It the utility model is related to sensor technical field, it is a kind of optical fiber pressure measurement sensor, it includes body and housing, expansion link is set with hole, the ball that diameter is less than groove diameter is installed with the bottom of expansion link, ball base is on shell fragment, the top of expansion link is located in housing, diaphragm support is installed with the top of expansion link, back-up ring is installed with the top of expansion link, at least two sleeves are circumferentially installed with back-up ring upper surface, spring is set with sleeve, hole is provided with the case top opening position corresponding with sleeve, the briquetting that can be touched when pressing is provided with hole with spring interface.The utility model reasonable and compact in structure, realize that different pressures detect the regulation of range by briquetting, solve the existing measurement journey of traditional fiber pressure sensor to fix, cause to detect the problem of inaccurate when pressure is higher or lower, the accuracy of pressure detecting is ensure that, improves the stability of whole measurement apparatus.

Description

Fiber Optic Pressure Measurement Sensor

technical field

The utility model relates to the technical field of sensors, which is an optical fiber pressure measurement sensor.

Background technique

Fiber Bragg grating sensor is a kind of fiber optic sensor. It obtains sensing information by modulating the fiber Bragg wavelength with external physical parameters. It is a wavelength modulation fiber sensor with good reliability, high measurement accuracy, real-time monitoring and Electromagnetic interference and other advantages, mainly including fiber grating strain sensors, temperature sensors, acceleration sensors, displacement sensors, pressure sensors, flow sensors, liquid level sensors, etc. Optical fiber pressure sensors can monitor pressure or tension. Traditional optical fiber pressure sensors are mostly electronic sensors with short transmission distances, no resistance to lightning strikes, and no resistance to electromagnetic interference. The detection range of traditional optical fiber pressure sensors is fixed, resulting in high pressure or less accurate detection.

Contents of the invention

The utility model provides an optical fiber pressure measurement sensor, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of inaccurate detection when the pressure is high or low due to the fixed measurement range of the existing optical fiber pressure sensor. question.

The technical solution of the utility model is realized by the following measures: an optical fiber pressure measurement sensor, comprising a pipe body with openings at both ends and a shell with an inverted barrel structure, the shell is fixedly installed in the middle of the top end of the pipe body, and The inner side of the middle part of the upper pipe wall of the pipe body is fixed with a downwardly bent shrapnel, and a groove is arranged on the pipe wall inside the shrapnel, and a hole is arranged on the pipe wall in the groove, and a telescopic rod is set in the hole, and the telescopic The lower part of the rod is located in the groove, and a ball with a diameter smaller than the diameter of the groove and larger than the diameter of the telescopic rod is fixedly installed at the bottom of the telescopic rod. A diaphragm bracket is installed, a diaphragm is installed on the diaphragm bracket, and an optical fiber sensitive element is fixedly installed on the inner side of the top of the housing at a position corresponding to the diaphragm bracket. There is a distance between the diaphragm and the optical fiber sensitive element. A retaining ring is fixedly installed on the upper part of the rod, and at least two sleeves are fixedly installed along the circumference on the upper surface of the retaining ring, and a spring is set in the sleeve, and a hole is provided at the position corresponding to the sleeve on the top of the shell. A pressing block capable of being in contact with the spring when pressed is installed in the hole.

Below is the further optimization or/and improvement to above-mentioned utility model technical scheme:

The above can also include a controller installed inside the housing and a display screen installed on the housing, a switching button is fixedly installed on the top of each of the pressing blocks, and the optical fiber sensitive element, the switching button and the display screen are all connected with the control electrical connection.

The above may also include a storage battery installed inside the casing and a power interface and a data interface installed on the casing, and the storage battery, the power interface and the data interface are all electrically connected to the controller.

The above-mentioned two sides of the housing can be hinged with handles, and anti-skid sleeves are fixedly installed on the handles; or/and, a handle can be fixedly installed on the top of the housing.

Both ends of the pipe body may be provided with internal threads, and both ends of the pipe body may be provided with engaging grooves of a regular polygonal structure.

The above-mentioned elastic pieces can be curved downward curved elastic pieces.

The utility model has a reasonable and compact structure and is easy to use. It is connected to the pipeline to be tested through the tube body, and a certain number of briquetting blocks are pressed according to the required range. The liquid or gas inside the pipeline to be tested flows through the tube body to compress the shrapnel, so that the shrapnel Moving up forces the telescopic rod to move up, so that the diaphragm moves up, and then the pressure is detected by the optical fiber sensor. Therefore, the utility model realizes the adjustment of different pressure detection ranges through the pressing block, which solves the problem that the traditional optical fiber pressure sensor has a fixed measurement range, which leads to inaccurate detection when the pressure is high or low, and ensures the accuracy of pressure detection. The degree improves the stability of the whole measuring device.

Description of drawings

Accompanying drawing 1 is the front view sectional structural schematic diagram of the preferred embodiment of the present invention.

Accompanying drawing 2 is the circuit connection diagram of the preferred embodiment of the utility model.

The codes in the drawings are: 1 is the tube body, 2 is the shell, 3 is the shrapnel, 4 is the groove, 5 is the telescopic rod, 6 is the ball, 7 is the diaphragm bracket, 8 is the optical fiber sensitive element, 9 is the Stop ring, 10 is a sleeve, 11 is a spring, 12 is a pressing block, and 13 is a handle.

Detailed ways

The utility model is not limited by the following examples, and the specific implementation manner can be determined according to the technical scheme of the utility model and actual conditions.

In this utility model, for the convenience of description, the description of the relative positional relationship of each component is described according to the layout method of Fig. The relationship is determined according to the layout direction of Figure 1 of the specification.

Below in conjunction with embodiment and accompanying drawing, the utility model is further described:

As shown in Figures 1 and 2, the optical fiber pressure measurement sensor includes a tube body 1 with openings at both ends and a housing 2 with an inverted barrel-shaped structure. The housing 2 is fixedly installed in the middle of the top of the tube body 1, The inner side of the middle part of the upper tube wall of the tube body 1 is fixed with a downwardly bent shrapnel 3, and a groove 4 is arranged on the inner side of the shrapnel 3, and a hole is arranged on the tube wall inside the groove 4, and the sleeve is set in the hole. There is telescopic rod 5, the bottom of telescopic rod 5 is located in groove 4, and the bottom end of telescopic rod 5 is fixedly installed with the ball 6 that diameter is less than groove 4 diameter and larger than telescopic rod 5 diameters, and ball 6 is seated on shrapnel 3, The top of the telescopic rod 5 is located in the housing 2, the top of the telescopic rod 5 is fixedly installed with a diaphragm support 7, the diaphragm is installed on the diaphragm support 7, and the inner side of the top of the housing 2 corresponds to the diaphragm support 7. An optical fiber sensitive element 8 is fixedly installed at the position, there is a distance between the diaphragm and the optical fiber sensitive element 8, a retaining ring 9 is fixedly installed on the top of the telescopic rod 5, and at least two sleeves are fixedly installed on the upper surface of the retaining ring 9 along the circumference. The sleeve 10 is fitted with a spring 11 inside the sleeve 10, and a hole is provided at the position corresponding to the sleeve 10 on the top of the housing 2, and a pressure block 12 that can be in contact with the spring 11 when pressed is installed in the hole.

Here, the casing 2 and the pipe body 1 can be integrally formed. The pipe body 1 can be made of metal material to ensure the strength of the pipe body 1 . The downwardly bent elastic piece 3 can be in the shape of an arc, and an accommodation groove can be arranged inside the middle part of the upper tube wall of the pipe body 1, and the elastic piece 3 can be fixedly installed in the accommodation groove. The bottom end of telescopic rod 5 is fixedly installed with ball 6, and the diameter of ball 6 is smaller than groove 4 diameters and is greater than telescopic rod 5 diameters, and there is spacing between the upper end surface of ball 6 and groove 4 tops, guarantees telescopic rod 5 and ball 6 has space to move up and down in the groove 4 and the ball 6 will not be taken out of the groove 4 by the telescopic rod 5 . The number of the sleeves 10 fixedly installed along the circumference on the upper surface of the retaining ring 9 can be set according to the actual situation, and the briquetting block 12 can be installed in the hole by threads or the like, and the quantity of the briquetting block 12 needs to be the same as that of the sleeve 10. The bottom end of the briquetting block 12 can be an inverted conical shape. When the briquetting block 12 is pressed or screwed, the bottom end of the briquetting block 12 needs to be able to contact the spring 11 in the sleeve 10 and not be lifted up by the spring 11. Here, Different numbers of pressure blocks 12 are pressed or screwed down to make contact with the spring 11 in the corresponding sleeve 10 to realize the adjustment of different pressure detection ranges and ensure the detection accuracy when the pressure is high or low. Block 12 is pressed or screwed down to represent the range to be set according to the actual situation. The pressure change value detected by the optical fiber sensitive element 8 is output in the form of an optical signal, and the pressure change value is obtained after signal demodulation.

When in use, connect the pipe body 1 of the present utility model to the pipeline to be tested, press a certain number of briquetting blocks 12 according to the required range, and the liquid or gas inside the pipeline to be tested flows through the pipe body 1 to compress the shrapnel 3, so that the shrapnel 3 Moving up forces the telescopic rod 5 to move up, so that the diaphragm moves up, and then the pressure situation is detected by the optical fiber sensitive element 8 . Therefore, the utility model realizes the adjustment of different pressure detection ranges through the pressing block 12, which solves the problem that the traditional optical fiber pressure sensor has a fixed measurement range, which leads to inaccurate detection when the pressure is high or low, and ensures the accuracy of pressure detection. Accuracy improves the stability of the entire measuring device.

According to actual needs, the above optical fiber pressure measurement sensor can be further optimized or/and improved:

As shown in Figures 1 and 2, it also includes a controller installed inside the housing 2 and a display screen installed on the housing 2, and a switch button is fixedly installed on the top of each of the pressing blocks 12, and the optical fiber sensitive The element 8, the switching button and the display screen are all electrically connected with the controller. Here, the number of switching buttons is the same as that of pressing blocks 12; the controller can process the data detected by the optical fiber sensitive element 8, and send it to the display screen for display by the staff, and at the same time, the controller can control the switching button to automatically press pressing blocks 12, The practicability and operability of the utility model are increased; the display screen can be an LED display screen.

As shown in Figures 1 and 2, it also includes a battery installed inside the housing 2 and a power interface and a data interface installed on the housing 2, and the battery, power interface and data interface are all electrically connected to the controller. Here both the battery and the power interface are electrically connected to the controller, including two power supply methods, one is that the battery supplies power to the controller, and the other is that the controller is powered through the power interface; the data interface is used to centrally export the data in the controller. measurement data, or import related data.

As shown in accompanying drawings 1 and 2, handles are hinged on both sides of the housing 2, and anti-skid sleeves are fixedly mounted on the handles. The use of the utility model is more convenient through the handle.

As shown in accompanying drawings 1 and 2, a handle 13 is fixedly installed on the top of the housing 2 . The use of the utility model is more convenient by the handle 13.

As shown in Figures 1 and 2, internal threads are provided on both ends of the pipe body 1, and regular polygonal slots are provided on both ends of the pipe body 1 outside. Here, both ends of the pipe body 1 are provided with internal threads, and both ends of the pipe body 1 are provided with regular polygonal card slots, which facilitates the stable connection between the utility model and the pipeline to be tested, and increases the stability of pressure detection. .

As shown in Figures 1 and 2, the elastic piece 3 is an arc-shaped elastic piece bent downward.

The above technical features constitute the best embodiment of the utility model, which has strong adaptability and best implementation effect, and non-essential technical features can be increased or decreased according to actual needs to meet the needs of different situations.

Claims (9)

1. a kind of optical fiber pressure measurement sensor, it is characterised in that the body including both ends open and the shell in inversion barrel-like structure Body, the housing are fixedly mounted on the top middle portion of body, are installed with and are bent downwardly in the upper tube wall inside middle portion of body Shell fragment, groove is provided with the tube wall on the inside of shell fragment, hole is provided with the tube wall in groove, is set with hole flexible Bar, the bottom of expansion link in the grooves, diameter are installed with the bottom of expansion link less than groove diameter and more than flexible The ball of shank diameter, on shell fragment, the top of expansion link is located in housing ball base, and film is installed with the top of expansion link Plate rack, diaphragm is installed on diaphragm support, the opening position corresponding with diaphragm support is fixedly mounted on the inside of case top There is optical fiber sensing element, have spacing between diaphragm and optical fiber sensing element, be installed with back-up ring on the top of expansion link, keeping off Circle upper surface is circumferentially installed with least two sleeves, and spring is set with sleeve, relative with sleeve in case top The opening position answered is provided with hole, the briquetting that can be touched when pressing is provided with hole with spring interface.

2. optical fiber pressure measurement sensor according to claim 1, it is characterised in that also include installed in enclosure interior Controller and the display screen on housing, switching push button is installed with the top of each briquetting, optical fiber is quick Sensing unit, switching push button and display screen are electrically connected with the controller.

3. optical fiber pressure measurement sensor according to claim 2, it is characterised in that also include installed in enclosure interior Battery and power interface and data-interface on housing, the battery, power interface and data-interface with control Device electrical connection processed.

4. according to the optical fiber pressure measurement sensor described in claim 1 or 2 or 3, it is characterised in that in the both sides of the housing Handle is hinged with, anti-skidding sleeve pipe is installed with handle；Or/and it is installed with handle in case top.

5. according to the optical fiber pressure measurement sensor described in claim 1 or 2 or 3, it is characterised in that at the both ends of the body Inner side is equipped with internal thread, and the neck of regular polygon structure is equipped with the outside of the both ends of body.

6. optical fiber pressure measurement sensor according to claim 4, it is characterised in that on the inside of the both ends of the body Provided with internal thread, the neck of regular polygon structure is equipped with the outside of the both ends of body.

7. according to the optical fiber pressure measurement sensor described in claim 1 or 2 or 3 or 6, it is characterised in that the shell fragment is downward The arc spring lamination of bending.

8. optical fiber pressure measurement sensor according to claim 4, it is characterised in that the shell fragment is reclinate arc Shape shell fragment.

9. optical fiber pressure measurement sensor according to claim 5, it is characterised in that the shell fragment is reclinate arc Shape shell fragment.