CN105043649A - Probe structure of single fiber bundle differential pressure sensor - Google Patents
Probe structure of single fiber bundle differential pressure sensor Download PDFInfo
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- CN105043649A CN105043649A CN201510404083.5A CN201510404083A CN105043649A CN 105043649 A CN105043649 A CN 105043649A CN 201510404083 A CN201510404083 A CN 201510404083A CN 105043649 A CN105043649 A CN 105043649A
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Abstract
The invention provides a probe structure of a single fiber bundle differential pressure sensor. A piston is slidably arranged in a shell. Each of two ends of the piston is provided with a spring. One end of each of the two springs is fixed on the piston. Two ends of the shell are fixed with end covers. The other end of each of the two springs is fixed on the corresponding end cover. Each of the end covers is provided with a through hole in the length direction of the shell. Each of the two ends of the piston is provided with a piston rod. The other end of each of the two piston rods extends in the through hole in the corresponding end cover. A sealing ring is arranged between each piston rod and the corresponding through hole. The end surface of the piston rod in one through hole is provided with a reflective mirror, and a fiber probe extends through the other end of the through hole. A cavity at each of the two ends of the piston is internally provided with a fluid through hole leading to the external of the probe structure. The invention solves problems that the conventional differential pressure sensor cannot be applied to many occasions, is not high in practicality, and cannot meet practical requirements for differential pressure measurement. The invention belongs to the field of differential pressure detection.
Description
Technical field
The present invention relates to a kind of sensor probe configuration, belong to technical field of optical fiber sensing.
Background technology
Differential pressure pick-up is widely used in industry, is mainly used in measuring equipment, parts or the fluid pressure differential at diverse location, and it is widely used in the detection fields such as tail gas pressure reduction, gas flow, height of liquid level, clean room monitoring.Now, there is the differential pressure pick-up adopting different principle, such as resistance-type, condenser type, inductance type, flow controller formula, magnetic liquid formula, MEMS formula etc., wherein resistance-type, condenser type are comparatively common, all the other types are because practicality is not strong, limitation is in the concept phase more greatly or still, be not promoted, but also there is the shortcoming of self in resistance-type, capacitance differential pressure transducer, can not well be competent in a lot of occasion.
Summary of the invention
The object of the invention is to: the sonde configuration providing a kind of single fiber bundle differential pressure pick-up, inapplicable in a lot of occasion to solve existing differential pressure pick-up, practicality is strong, cannot meet actual pressure differential and measure the problem required.
The solution of the present invention is as follows: a kind of sonde configuration of single fiber bundle differential pressure pick-up, comprise housing, housing is tubular construction, slide in housing and be provided with piston, the two ends of piston are respectively arranged with a spring, one end of two springs is all fixed on piston, the two ends of housing seal respectively and are fixed with end cap, the other end of two springs is individually fixed on corresponding end cap, two end caps all offer a through hole along the length direction of housing, the two ends of piston are respectively arranged with a piston rod, one end of two piston rods is corresponding to be respectively fixed on the end face of piston, the other end of two piston rods is stretched in the through hole on corresponding end cap respectively, and be provided with O-ring seal between piston rod and through hole, the end face of the piston rod in one of them through hole is provided with reflective mirror, and in this through hole, fibre-optical probe has been stretched into by the other end of this through hole, the sidewall of the through hole between fibre-optical probe with this piston rod also offers the air hole be connected with sonde configuration outside, a fluid through-hole be connected with sonde configuration outside is offered respectively in the chamber at piston two ends.
In order to avoid the impact that spring detects sensor probe, the structure of two springs and specification are all identical, when piston is positioned at the centre position of two end cap, two springs all in the raw, i.e. spring tensionless winkler foundation and compression set;
For ensureing the sensing effect of fibre-optical probe, ensure that the distance between two ends fibre-optical probe and reflecting piece balances, two through holes are all opened in the center position of place end cap, and two through holes, piston and two piston rods are all coaxially arranged, and reflective mirror is vertical with fibre-optical probe to be arranged;
As preferred structure, described fibre-optical probe is tightened in through hole by screw thread, firm and accurate to ensure that fibre-optical probe is located;
For ensureing the fixing of spring and the dilatation in deflected length direction occurring when preventing spring from using, the middle part of end cap is provided with the lug boss stretched in housing, lug boss is the cylindrical structural coaxial with through hole, and one end of two springs is respectively on the sheathed lug boss being fixed on corresponding end cap;
For ensureing the sealing effectiveness of piston, anti-fluid flows into spring place chamber through piston ridge, is provided with piston packing between piston and the inwall of housing;
For ensureing serviceable life and the result of use of sensor, the material of piston is wimet;
For the impurity in anti-fluid enters sensor probe, described fluid through-hole is provided with filter screen.
The fibre bundle of fibre-optical probe is formed by incident optical and reception optical fiber set armouring, and the incident optical other end docks with light source, in order to the incident light that is coupled, receives fiber exit end and is connected with light activated element, output light intensity signal.
The principle of work of sensor probe part is: pass into two kinds respectively by two fluid through-holes and treat fluid measured, when the hydrodynamic pressure in the test chamber of the left and right sides is equal, piston is in equilibrium position, middle part, and the axis on piston makes a concerted effort to be zero, and piston does not produce axial displacement; When there is pressure differential in the fluid in the test chamber of the piston left and right sides, piston out of trim, to the lower Slideslip of pressure, thus compress this side damping spring, opposite side damping spring is stretched, piston movement make a concerted effort to a new axis be zero equilibrium position.When piston is in equilibrium position, middle part, distance between the fibre-optical probe of sensor side and piston rod end face reflective mirror is initial distance, being considered as identical and storing their data in computing machine of this initial distance same model, test out reflected light initial beam intensity, now after opto-electronic conversion and signal transacting calculate, output valve is 0 simultaneously; When the fluid in the test chamber of the piston left and right sides exists pressure differential, now both sides damping spring is different by the length compressed, and piston produces axial displacement.Therefore, sensor fiber probe changes with the distance of reflective mirror, thus the output optical signal intensity that fibre-optical probe receives optical fiber is different from initial beam intensity, the output valve size after opto-electronic conversion and signal transacting calculate can reflect the pressure differential size of both sides test chamber inner fluid.
The present invention compared with prior art, major advantage is as follows: known through structural design, theoretical research and experimental analysis, this sensor has less structure, higher degree of accuracy and reliability, the preferably advantage such as adaptability and interchangeability, practicality is extremely strong, output signal output valve after opto-electronic conversion and signal transacting calculate will change at double, thus improve detection sensitivity, this sensor can be applicable to numerous pressure differential detection occasion.
Meanwhile, this sensor probe adopts piston cylinder operator as pressure detector part, when running into hydrodynamic pressure, piston is translation motion, only need can calculate fluid pressure differential according to the translational movement of piston, the requirement for Fibre Optical Sensor is lower, calculates and measures more simple, and piston structure is more stable, be not subject to external interference, not fragile, serviceable life is more permanent, the reliability of sensor, adaptability and interchangeability are had comparatively much progress, is suitable for the measurement being used as fluid differential pressure; The intensity compensation principle of sensor is more simple, and practicality is stronger.
Accompanying drawing explanation
Fig. 1 is cross-sectional view of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, the present invention is described in further detail below with reference to accompanying drawings,
Embodiment:
With reference to Fig. 1, the present embodiment provides a kind of sonde configuration of single fiber bundle differential pressure pick-up, comprise housing 1, housing 1 is tubular construction, slide in housing 1 and be provided with piston 2, the material of piston 2 is hard aluminium alloy, piston packing 11 is provided with between the inwall of piston 2 and housing 1, the two ends of piston 2 are respectively arranged with a spring 4, the structure of two springs 4 and specification are all identical, when piston 2 is positioned at the centre position of two end cap 2, two springs 4 all in the raw, one end of two springs 4 is all fixed on piston 2, the two ends of housing 1 seal respectively and are fixed with end cap 3, the middle part of end cap 3 is provided with the lug boss 32 stretched in housing 1, lug boss 32 is cylindrical structurals coaxial with through hole 31, the other end of two springs 4 is respectively on the sheathed lug boss 32 being fixed on corresponding end cap 3, two end caps 3 all offer a through hole 31 along the length direction of housing 1, the two ends of piston 2 are respectively arranged with a piston rod 5, one end of two piston rods 5 is corresponding to be respectively fixed on the end face of piston 2, two through holes 31 are all opened in the center position of place end cap 3, two through holes 31, piston 2 and two piston rods 5 are all coaxially arranged, the other end of two piston rods 5 is stretched in the through hole 31 on corresponding end cap 3 respectively, and be provided with O-ring seal 6 between piston rod 5 and through hole 31, the end face of the piston rod 5 in one of them through hole 31 is provided with reflective mirror 7, and in this through hole 31, fibre-optical probe 8 has been stretched into by the other end of this through hole 31, fibre-optical probe 8 is tightened in through hole 31 by screw thread, reflective mirror 7 is vertical with fibre-optical probe 8 to be arranged, the sidewall of the through hole 31 between fibre-optical probe 8 with this piston rod 5 also offers the air hole 9 be connected with sonde configuration outside, a fluid through-hole 10 be connected with sonde configuration outside is offered respectively in the chamber at piston 2 two ends, fluid through-hole 10 is provided with filter screen 12.
Claims (8)
1. the sonde configuration of a single fiber bundle differential pressure pick-up, it is characterized in that: comprise housing (1), housing (1) is tubular construction, slide in housing (1) and be provided with piston (2), the two ends of piston (2) are respectively arranged with a spring (4), one end of two springs (4) is all fixed on piston (2), the two ends of housing (1) seal respectively and are fixed with end cap (3), the other end of two springs (4) is individually fixed on corresponding end cap (3), two end caps (3) all offer a through hole (31) along the length direction of housing (1), the two ends of piston (2) are respectively arranged with a piston rod (5), one end of two piston rods (5) respectively correspondence is fixed on the end face of piston (2), the other end of two piston rods (5) is stretched in the through hole (31) on corresponding end cap (3) respectively, and be provided with O-ring seal (6) between piston rod (5) and through hole (31), the end face of the piston rod (5) in one of them through hole (31) is provided with reflective mirror (7), and in this through hole (31), fibre-optical probe (8) has been stretched into by the other end of this through hole (31), the sidewall of the through hole (31) between fibre-optical probe (8) with this piston rod (5) also offers the air hole (9) be connected with sonde configuration outside, a fluid through-hole (10) be connected with sonde configuration outside is offered respectively in the chamber at piston (2) two ends.
2. the sonde configuration of a kind of single fiber bundle differential pressure pick-up according to claim 1, it is characterized in that: structure and the specification of two springs (4) are all identical, when piston (2) is positioned at the centre position of two end cap (2), two springs (4) all in the raw.
3. the sonde configuration of a kind of single fiber bundle differential pressure pick-up according to claim 1, it is characterized in that: two through holes (31) are all opened in the center position of place end cap (3), two through holes (31), piston (2) and two piston rods (5) are all coaxially arranged, and reflective mirror (7) is vertical with fibre-optical probe (8) to be arranged.
4. the sonde configuration of a kind of single fiber bundle differential pressure pick-up according to claim 1, is characterized in that: described fibre-optical probe (8) is tightened in through hole (31) by screw thread.
5. the sonde configuration of a kind of single fiber bundle differential pressure pick-up according to claim 1, it is characterized in that: the middle part of end cap (3) is provided with the lug boss (32) stretched in housing (1), lug boss (32) is the cylindrical structural coaxial with through hole (31), and one end of two springs (4) is sheathed to be respectively fixed on the lug boss (32) of corresponding end cap (3).
6. the sonde configuration of a kind of single fiber bundle differential pressure pick-up according to claim 1, is characterized in that: be provided with piston packing (11) between the inwall of piston (2) and housing (1).
7. the sonde configuration of a kind of single fiber bundle differential pressure pick-up according to claim 1, is characterized in that: the material of piston (2) is wimet.
8. the sonde configuration of a kind of single fiber bundle differential pressure pick-up according to claim 1, is characterized in that: fluid through-hole (10) is provided with filter screen (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510404083.5A CN105043649A (en) | 2015-07-10 | 2015-07-10 | Probe structure of single fiber bundle differential pressure sensor |
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| CN201510404083.5A CN105043649A (en) | 2015-07-10 | 2015-07-10 | Probe structure of single fiber bundle differential pressure sensor |
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| CN105043649A true CN105043649A (en) | 2015-11-11 |
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| CN201510404083.5A Pending CN105043649A (en) | 2015-07-10 | 2015-07-10 | Probe structure of single fiber bundle differential pressure sensor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806422A (en) * | 2016-05-30 | 2016-07-27 | 贵州大学 | Flow sensor probe with single optical fiber bundle and detection method implemented by flow sensor probe |
| CN105890678A (en) * | 2016-05-30 | 2016-08-24 | 贵州大学 | Momentum type flow sensor probe structure and detection method thereof |
| CN105910660A (en) * | 2016-05-30 | 2016-08-31 | 贵州大学 | Dynamic-measurement type flow sensor and detection method thereof |
| CN106052781A (en) * | 2016-05-30 | 2016-10-26 | 贵州大学 | Single-piston fiber flow sensor probe and detection method thereof |
| CN106092222A (en) * | 2016-05-30 | 2016-11-09 | 贵州大学 | A kind of single-piston optic flow sensor and detection method thereof |
| CN106092217A (en) * | 2016-05-30 | 2016-11-09 | 贵州大学 | A kind of single fiber line quantity sensor and detection method thereof |
| CN106338425A (en) * | 2016-10-21 | 2017-01-18 | 贵州大学 | Mounting mechanism making two metal mounting ends conductive and mounting method thereof |
| CN109459165A (en) * | 2018-12-26 | 2019-03-12 | 中国石油集团川庆钻探工程有限公司 | High-static-pressure differential pressure optical fiber sensor, differential pressure monitoring method and application |
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| CN204758201U (en) * | 2015-07-10 | 2015-11-11 | 贵州大学 | Differential pressure sensor's probes structure is restrainted to single fiber |
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2015
- 2015-07-10 CN CN201510404083.5A patent/CN105043649A/en active Pending
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806422B (en) * | 2016-05-30 | 2019-08-09 | 贵州大学 | A kind of single fiber line quantity sensor probe and its detection method |
| CN105890678A (en) * | 2016-05-30 | 2016-08-24 | 贵州大学 | Momentum type flow sensor probe structure and detection method thereof |
| CN105910660A (en) * | 2016-05-30 | 2016-08-31 | 贵州大学 | Dynamic-measurement type flow sensor and detection method thereof |
| CN106052781A (en) * | 2016-05-30 | 2016-10-26 | 贵州大学 | Single-piston fiber flow sensor probe and detection method thereof |
| CN106092222A (en) * | 2016-05-30 | 2016-11-09 | 贵州大学 | A kind of single-piston optic flow sensor and detection method thereof |
| CN106092217A (en) * | 2016-05-30 | 2016-11-09 | 贵州大学 | A kind of single fiber line quantity sensor and detection method thereof |
| CN105806422A (en) * | 2016-05-30 | 2016-07-27 | 贵州大学 | Flow sensor probe with single optical fiber bundle and detection method implemented by flow sensor probe |
| CN106092217B (en) * | 2016-05-30 | 2019-02-19 | 贵州大学 | A kind of single fiber line quantity sensor and its detection method |
| CN106052781B (en) * | 2016-05-30 | 2019-03-08 | 贵州大学 | A kind of single-piston optic flow sensor probe and its detection method |
| CN105910660B (en) * | 2016-05-30 | 2020-03-24 | 贵州大学 | Momentum type flow sensor and detection method thereof |
| CN106092222B (en) * | 2016-05-30 | 2019-03-12 | 贵州大学 | A kind of single-piston optic flow sensor and its detection method |
| CN106338425A (en) * | 2016-10-21 | 2017-01-18 | 贵州大学 | Mounting mechanism making two metal mounting ends conductive and mounting method thereof |
| CN106338425B (en) * | 2016-10-21 | 2023-08-08 | 贵州大学 | Mounting mechanism for conducting two ends of metal mounting and mounting method thereof |
| CN109459165A (en) * | 2018-12-26 | 2019-03-12 | 中国石油集团川庆钻探工程有限公司 | High-static-pressure differential pressure optical fiber sensor, differential pressure monitoring method and application |
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