CN105092136A - Underground quartz resonant pressure sensor - Google Patents
Underground quartz resonant pressure sensor Download PDFInfo
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- CN105092136A CN105092136A CN201510240230.XA CN201510240230A CN105092136A CN 105092136 A CN105092136 A CN 105092136A CN 201510240230 A CN201510240230 A CN 201510240230A CN 105092136 A CN105092136 A CN 105092136A
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- quartz
- crystal resonator
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- pressure transducer
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Abstract
An underground quartz resonant pressure sensor comprises a cylindrical housing, and a quartz crystal resonator and a support that are arranged in the housing. The quartz crystal resonator is embedded in the support. The support is fixedly disposed in the housing. The center of one end of the housing is equipped with a screw passing hole. A fine tuning screw is inserted into the screw passing hole in a sealed manner. The other end of the housing is provided with a pressure detection window, an elastic metal diaphragm is disposed in the pressure detection window in a sealed manner, and the pressure detection window is provided with a protruding column that corresponds to the center of one side in the housing. The quartz crystal resonator is 4.992MHz quartz crystal resonator which has a fifth-overtone thickness-shear vibration mode and is shaped like an opened circular ring sheet. A pair of sealed electrode guide-out ends passing through the housing is welded to the quartz crystal resonator. One end, facing the protruding column, of the fine tuning screw and one corresponding end, facing the fine tuning screw, of the protruding column are both inserted into the support. Force sensitive points of the quartz crystal resonator are in contact with the corresponding transverse planes of the fine tuning screw and the protruding column.
Description
Technical field
The present invention relates to art of pressure sensors, refer to a kind of down-hole quartz resonance pressure transducer measured for oil well pressure in field of petroleum exploitation especially.
Background technology
Pressure transducer is a kind of sensor the most conventional in industrial practice, it is widely used in various industrial automatic control environment, relates to numerous industries such as water conservancy and hydropower, railway traffic, intelligent building, production automatic control, Aero-Space, military project, petrochemical industry, oil well, electric power, boats and ships, lathe, pipeline.Pressure transducer of a great variety and application is extremely wide, but, the tonometric sensor of oil field well can be used for and can be counted on one's fingers.Because the pressure of oil well is large, temperature is high, well liquid corrodes serious, work condition environment is severe, comparatively harsh to the requirement of load cell.Usually, mostly domesticly be strain pressure transducer, external has condenser type and quartz resonance etc. several.Cheap because of it for strain-type, capacitance pressure transducer, easy to use and be widely adopted, but there is the factors such as creep, delayed, warm drift and circuit complexity in it, make its measuring accuracy generally about 0.1%, the requirement of the high precision measurements such as such as interference test, pulse test and reservoir delineation test can not be met.For this kind of high-precision oil well test, quartz resonance pressure transducer is usually adopted.
Quartz resonance pressure transducer adopts quartz-crystal resonator as force sensing element.When tested parameter changes, its natural vibration frequency changes thereupon, and the excitation based on piezoelectric effect just can obtain with measuring method the frequency signal becoming certain relation with tested parameter.The resonator thickness-shear vibration mode formula BT cut type quartz crystal that this sensor adopts makes.The monolithic construction comprising disc oscillator and force mechanism made by resonator.Oscillator is lenticular, and force mechanism is the cylindrical shape around disk.Oscillator and cylinder are formed by same quartz crystal overall processing, oscillator both sides respectively have the coated electrode covered along barrel (extending to outer wall by inner chamber) for a pair.For reducing hysteresis error, the end cap of cylinder also adopts the continuous same quartz crystal with cylinder lattice to process, and for improving the quality factor of oscillator, cylinder and end cap strictly seal, and its internal cavities is pumped into vacuum.Quartz cylinder can transmit the pressure of surrounding effectively.When on electrode in addition driving voltage time, utilize inverse piezoelectric effect to make oscillator vibration, alternation electric charge appear again in electrode simultaneously, carry out the energy needed for supplementary this electricity and mechanical continuous oscillation by the electrode be connected with external circuit.When quartz vibrator is by static pressure effect, vibration frequency changes, and linear with institute plus-pressure.Thickness shear modulus quartzy in the process plays Main Function with the change of pressure.Its major advantage be precision up to more than 0.025%, and delayed and repeatability is all little, frequency stability is splendid.But its complex structure, processing difficulties, cost are also high.Electrode part due to oscillator is exposed in test environment, when the medium of cylinder confined pressure contains electrolyte ingredient, the output amplitude of sensor can be made to reduce, can cause not working time serious.In order to suppress this situation to occur, usually protected with pressure transmission hole metal cylinder by sensor, adopt the pure silicone oil of capillary filling to carry out barrier wells liquid, this brings inconvenience to onsite application.
Transform very difficult to existing quartz resonance pressure transducer, for solving the problem, necessaryly to look for another way, designing a novel down-hole quartz resonance pressure transducer, to overcome the technological deficiency that it exists.
Summary of the invention
The invention provides a kind of down-hole quartz resonance pressure transducer, its technical problem underlying to be solved is: traditional quartz resonance pressure sensor structure complexity, processing difficulties, cost are high, and the electrode part of oscillator is exposed in test environment, when the medium of cylinder confined pressure contains electrolyte ingredient, the output amplitude of sensor can be made to reduce, can cause time serious not working; And by sensor with protecting with pressure transmission hole metal cylinder, and the mode adopting the pure silicone oil of capillary filling to carry out barrier wells liquid suppresses sensor output amplitude to reduce, and can bring inconvenience again to onsite application.
For the deficiencies in the prior art, the invention provides a kind of down-hole quartz resonance pressure transducer, it comprise tubular housing, be arranged on quartz-crystal resonator in described housing and support, described quartz-crystal resonator is embedded in described support, and described support is fixedly mounted in described housing;
The centre, one end of described housing is preset with screw perforation, what be threaded in described screw perforation is inserted with one for regulating the micrometer adjusting screw of pretightning force, be tightly connected between described micrometer adjusting screw and described screw perforation, the other end of described housing offers pressure detection window, what seal in described pressure detection window is provided with elastic metallic diaphragm, and the centre described elastic metallic diaphragm corresponding to side in described housing is provided with a projection;
Described quartz-crystal resonator be have fifth overtone thickness-shear vibration mode formula in open circles ring plate shape 4.992MHz quartz-crystal resonator, the cut type of described quartz-crystal resonator is AT cut type, described quartz-crystal resonator is welded with pair of electrodes exit, what described pair of electrodes exit sealed passes the sidewall described housing being offered described screw perforation one end;
On described support, the both sides of corresponding described micrometer adjusting screw and projection all offer jack respectively, described micrometer adjusting screw inserts in described support through described jack with one end mutually corresponding on projection respectively, the quick point of power of the described quartz-crystal resonator in open circles ring plate shape is positioned on cylindrical anchor ring, and the quick point of the power of described quartz-crystal resonator respectively with end contact mutually corresponding on described micrometer adjusting screw and projection.
Be preferable over: described housing is offered seal in the sidewall of described screw perforation one end be inserted with a vacuum pipeline, the corresponding one end sealing outside described housing of described vacuum pipeline, the vacuum tightness in described housing is 6 × 10
-1pa.
Be preferable over: in described support, axial one end of the corresponding described quartz-crystal resonator in open circles ring plate shape is convexly equipped with two card keys, described two card keys are respectively to the end face both sides of axial one end being stuck in the described quartz-crystal resonator in open circles ring plate shape, and the radial direction of the corresponding described housing of described two card keys difference, in described support, the axial other end of the corresponding described quartz-crystal resonator in open circles ring plate shape is provided with an annular gasket, and described quartz-crystal resonator is embedded between described two card keys and described annular gasket.
Be preferable over: the position that the described quartz-crystal resonator in open circles ring plate shape contacts with described micrometer adjusting screw and projection is respectively provided with plane of constraint.
Be preferable over: the outside surface of the described quartz-crystal resonator in open circles ring plate shape is coated with gold film.
Be preferable over: the hole shoulder of described screw perforation offers counterbore, the ailhead of described micrometer adjusting screw sinks in described counterbore, the outer axial face of described ailhead offers ring-shaped insert groove, be embedded with O RunddichtringO in described ring-shaped insert groove, described O RunddichtringO sealing gasket is located between the outer axial face of described ailhead and the inner hole wall of described counterbore.
Be preferable over: the sealing of the outward flange of described elastic metallic diaphragm be welded in the pressure detection window of described housing, the side on described elastic metallic diaphragm outside corresponding described housing offers annular ditch groove.
Be preferable over: described housing cylindrically, the outer axial face described housing being positioned at two ends is respectively arranged with external thread section.
Compared with prior art, the invention has the beneficial effects as follows:
1, the present invention adopts monolithic quartz-crystal resonator and elastic metallic diaphragm to be as pressure-sensing device, compared with integrally-built quartz crystal pressure transducer, its structure is simple, cost and cheap, frequency stabilization is high, and maintains higher pressure measurement precision (0.05%);
2, with elastic metallic diaphragm for pressure-sensing device, when ambient pressure acts on elastic metallic diaphragm, the center converting elastic metallic diaphragm to is along the direction of power to side displacement, the axially-movable of elastic metallic diaphragm interlock projection, be applied on the quick point of power of resonator, the frequency of resonator changes with acting force change, utilize the frequency change of resonator to detect by the size of measuring pressure, elastic metallic diaphragm is adopted to realize the conversion of pressure to power, there is the effect of isolation different medium simultaneously, effectively can isolate the erosion of well liquid to sensor, onsite application and convenience thereof,
3, enclosure interior is vacuum tightness is 6 × 10
-1the vacuum state of Pa, and then the vibration damping that can reduce quartz-crystal resonator, make the easier starting of oscillation of quartz-crystal resonator, can effectively guarantee pressure measurement precision.
Accompanying drawing explanation
Fig. 1 is the end view being provided with micrometer adjusting screw one end of the present invention.
Fig. 2 is the sectional structure schematic diagram along A-A in Fig. 1.
Fig. 3 is the sectional structure schematic diagram along B-B in Fig. 1.
Embodiment
Below with reference to accompanying drawing 1 to 3 and preferred embodiment, a kind of down-hole quartz resonance pressure transducer that the present invention proposes specifically is illustrated.
Embodiment one:
The invention provides a kind of down-hole quartz resonance pressure transducer, it comprise tubular housing 1, be arranged on quartz-crystal resonator 2 in described housing 1 and support 3, described quartz-crystal resonator 2 is embedded in described support 3, and described support 3 is fixedly mounted in described housing 1; The centre, one end of described housing 1 is preset with screw perforation, what be threaded in described screw perforation is inserted with one for regulating the micrometer adjusting screw 11 of pretightning force, be tightly connected between described micrometer adjusting screw 11 and described screw perforation, the other end of described housing 1 offers pressure detection window, what seal in described pressure detection window is provided with elastic metallic diaphragm 4, and the centre described elastic metallic diaphragm 4 corresponding to side in described housing 1 is provided with a projection 41; Described quartz-crystal resonator 2 is open circles ring plate shape 4.992MHz quartz-crystal resonator for what have fifth overtone thickness-shear vibration mode formula, the cut type of described quartz-crystal resonator 2 is AT cut type, namely cut type is the thickness-shear vibration mode formula of (YXL) 35 °, described quartz-crystal resonator 2 is welded with pair of electrodes exit 21, and what described pair of electrodes exit 21 sealed passes the sidewall described housing 1 being offered described screw perforation one end; On described support 3, the both sides of corresponding described micrometer adjusting screw 11 and projection 41 all offer jack respectively, described micrometer adjusting screw 11 inserts in described support 3 through described jack with one end mutually corresponding on projection 41 respectively, the quick point of power of the described quartz-crystal resonator 2 in open circles ring plate shape is positioned on cylindrical anchor ring, and the quick point of the power of described quartz-crystal resonator 2 respectively with end contact mutually corresponding on described micrometer adjusting screw 11 and projection 41.
The present embodiment one in the specific implementation, the Thickness Ratio fundamental crystal of overtone crystal wants large, be beneficial to the power that carrying is larger, and be convenient to processing, reduce difficulty of processing, with described elastic metallic diaphragm 4 for pressure-sensing device, by testing environment that is corresponding for one end of upward pressure detection window of the present invention, when the pressure in testing environment acts on described elastic metallic diaphragm 4, the center converting elastic metallic diaphragm 4 to is along the direction of power to side displacement, link in the center displacement process of elastic metallic diaphragm 4 projection 41 axially-movable, on the quick point of power that described axial one end of projection 41 is applied to described quartz-crystal resonator 2, the frequency of described quartz-crystal resonator 2 changes with acting force change, the frequency change of described quartz-crystal resonator 2 is utilized to detect by the size of measuring pressure, described pair of electrodes exit 21 is connected with outside oscillatory circuit by high temperature wire, and exported to oscillatory circuit by the piezoelectric effect signal of described pair of electrodes exit 21 by described quartz-crystal resonator 2, described elastic metallic diaphragm 4 is adopted to realize the conversion of pressure to power, also isolate different medium by described elastic metallic diaphragm 4 simultaneously, can effectively barrier wells liquid to the erosion of the humorous whole device 2 of quartz crystal, onsite application and convenience thereof, in concrete assembling process, also realizing adjusting the pretightning force of the quick point of the power of described quartz-crystal resonator 2 by adjusting described micrometer adjusting screw 11 axially-movable, reaching the frequency of operation under the original state regulating sensor.
Embodiment two: as mentioned above, described housing 1 is offered seal in the sidewall of described screw perforation one end be inserted with a vacuum pipeline 5, one end sealing of described vacuum pipeline 5 correspondence outside described housing 1, the vacuum tightness in described housing 1 is 6 × 10
-1pa, the present embodiment in the specific implementation, the present invention, after assembling, connects outside vaccum-pumping equipment, after the vacuum tightness in described housing 1 arrives 6 × 10-1Pa in the corresponding outside one end of described vacuum pipeline 5, press from both sides flat described vacuum pipeline 5, and cut off described vacuum pipeline 5 in distance folder outer end, flat 3 ~ 5mm place, thoroughly seal at section high temperature scolding tin, this structure can be convenient to vacuumize, structure is simple, and assembling ending is relatively easy.
Embodiment three: further, in described support 3, axial one end of the corresponding described quartz-crystal resonator 2 in open circles ring plate shape is convexly equipped with two card keys 31, described two card keys 31 are respectively to the end face both sides of axial one end being stuck in the described quartz-crystal resonator 2 in open circles ring plate shape, and the radial direction of the corresponding described housing 1 of described two card keys 31 difference, this arrangement is conducive to the fine position of described quartz-crystal resonator 2 in assembling process and finds accurately, in described support 1, the axial other end of the corresponding described quartz-crystal resonator 2 in open circles ring plate shape is provided with an annular gasket 32, described quartz-crystal resonator 2 is embedded between described two card keys 31 and described annular gasket 32, described quartz-crystal resonator 2 suspension frame can effectively be located in described housing 1 by the structure of this support 3, prevent described quartz-crystal resonator 2 and other feature contacts Interference Detection.
Embodiment four: further, the position that the described quartz-crystal resonator 2 in open circles ring plate shape contacts with described micrometer adjusting screw 11 and projection 41 is respectively provided with plane of constraint, and then effectively raise contact area and the contact stabilization of the end face of described micrometer adjusting screw 11 and projection 41 and the quick point of power of described quartz-crystal resonator 2, guarantee pressure measurement precision further.
Embodiment five: further, the outside surface of the described quartz-crystal resonator 2 in open circles ring plate shape is coated with gold film by the mode of vacuum coating, utilizes gold film to collect surface charge, promotes charge detection stability.
Embodiment six: further, the hole shoulder of described screw perforation offers counterbore, the ailhead 111 of described micrometer adjusting screw 11 sinks in described counterbore, the outer axial face of described ailhead 111 offers ring-shaped insert groove, O RunddichtringO 6 is embedded with in described ring-shaped insert groove, described O RunddichtringO sealing 6 pad be located at described ailhead 111 between outer axial face and the inner hole wall of described counterbore, a kind of mode sealed described screw perforation is provided whereby, this mode structure is simple, and does not affect the degree of freedom of described micrometer adjusting screw 11.
Embodiment seven: further, the outward flange of described elastic metallic diaphragm 4 is welded in the pressure detection window of described housing 1 by the welding manner sealing of micro beam plasma welding or Laser Welding (LBW), side on described elastic metallic diaphragm 4 outside corresponding described housing 1 offers annular ditch groove 42, improve its elastic deformation limit, reduce elastically-deformable minimum dynamics, and then the power susceptibility of described elastic metallic diaphragm 4 can be promoted.
Embodiment eight: further, described housing 1 cylindrically, the outer axial face described housing 1 being positioned at two ends is respectively arranged with external thread section 12, and that lodges that the external thread section 12 be arranged in the outer axial face of described housing 1 two ends can be easy is arranged on down-hole of the present invention quartz resonance pressure transducer in downhole detection environment.
In sum, technical scheme of the present invention can fully effectively complete foregoing invention object, and structural principle of the present invention and the principle of work and power are all verified in an embodiment fully, and effect and the object of expection can be reached, and embodiments of the invention also can convert according to these principles, therefore, the present invention includes all in claim mention all replacement contents in scope.Any equivalence change done in the present patent application the scope of the claims, within the scope of the claims of all genus this case applications.
Claims (8)
1. a down-hole quartz resonance pressure transducer, it is characterized in that: comprise the housing of tubular, be arranged on quartz-crystal resonator in described housing and support, described quartz-crystal resonator is embedded in described support, and described support is fixedly mounted in described housing;
The centre, one end of described housing is preset with screw perforation, what be threaded in described screw perforation is inserted with one for regulating the micrometer adjusting screw of pretightning force, be tightly connected between described micrometer adjusting screw and described screw perforation, the other end of described housing offers pressure detection window, what seal in described pressure detection window is provided with elastic metallic diaphragm, and the centre described elastic metallic diaphragm corresponding to side in described housing is provided with a projection;
Described quartz-crystal resonator be have fifth overtone thickness-shear vibration mode formula in open circles ring plate shape 4.992MHz quartz-crystal resonator, the cut type of described quartz-crystal resonator is AT cut type, described quartz-crystal resonator is welded with pair of electrodes exit, what described pair of electrodes exit sealed passes the sidewall described housing being offered described screw perforation one end;
On described support, the both sides of corresponding described micrometer adjusting screw and projection all offer jack respectively, described micrometer adjusting screw inserts in described support through described jack with one end mutually corresponding on projection respectively, the quick point of power of the described quartz-crystal resonator in open circles ring plate shape is positioned on cylindrical anchor ring, and the quick point of the power of described quartz-crystal resonator respectively with end contact mutually corresponding on described micrometer adjusting screw and projection.
2. a kind of down-hole according to claim 1 quartz resonance pressure transducer, it is characterized in that: described housing is offered seal in the sidewall of described screw perforation one end be inserted with a vacuum pipeline, the corresponding one end sealing outside described housing of described vacuum pipeline, the vacuum tightness in described housing is 6 × 10
-1pa.
3. a kind of down-hole according to claim 2 quartz resonance pressure transducer, it is characterized in that: in described support, axial one end of the corresponding described quartz-crystal resonator in open circles ring plate shape is convexly equipped with two card keys, described two card keys are respectively to the end face both sides of axial one end being stuck in the described quartz-crystal resonator in open circles ring plate shape, and the radial direction of the corresponding described housing of described two card keys difference, in described support, the axial other end of the corresponding described quartz-crystal resonator in open circles ring plate shape is provided with an annular gasket, described quartz-crystal resonator is embedded between described two card keys and described annular gasket.
4. a kind of down-hole according to claim 3 quartz resonance pressure transducer, is characterized in that: the position that the described quartz-crystal resonator in open circles ring plate shape contacts with described micrometer adjusting screw and projection is respectively provided with plane of constraint.
5. a kind of down-hole according to claim 4 quartz resonance pressure transducer, is characterized in that: the outside surface of the described quartz-crystal resonator in open circles ring plate shape is coated with gold film.
6. a kind of down-hole according to claim 5 quartz resonance pressure transducer, it is characterized in that: the hole shoulder of described screw perforation offers counterbore, the ailhead of described micrometer adjusting screw sinks in described counterbore, the outer axial face of described ailhead offers ring-shaped insert groove, be embedded with O RunddichtringO in described ring-shaped insert groove, described O RunddichtringO sealing gasket is located between the outer axial face of described ailhead and the inner hole wall of described counterbore.
7. a kind of down-hole according to claim 6 quartz resonance pressure transducer, it is characterized in that: the sealing of the outward flange of described elastic metallic diaphragm be welded in the pressure detection window of described housing, the side on described elastic metallic diaphragm outside corresponding described housing offers annular ditch groove.
8. a kind of down-hole according to claim 7 quartz resonance pressure transducer, is characterized in that: described housing cylindrically, the outer axial face described housing being positioned at two ends is respectively arranged with external thread section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510240230.XA CN105092136B (en) | 2015-05-13 | 2015-05-13 | underground quartz resonance pressure sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510240230.XA CN105092136B (en) | 2015-05-13 | 2015-05-13 | underground quartz resonance pressure sensor |
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|---|---|
| CN105092136A true CN105092136A (en) | 2015-11-25 |
| CN105092136B CN105092136B (en) | 2017-11-03 |
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| CN201510240230.XA Expired - Fee Related CN105092136B (en) | 2015-05-13 | 2015-05-13 | underground quartz resonance pressure sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107588884A (en) * | 2017-08-08 | 2018-01-16 | 中国石油天然气集团公司 | One kind is with brill down-hole pressure measuring circuit and pressure measurement method |
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| CN103133530A (en) * | 2011-11-30 | 2013-06-05 | 上海宇航***工程研究所 | Adjustable pressing force pressing sliding mechanism and adjustment method of adjustable pressing force pressing sliding mechanism |
| CN103149002A (en) * | 2013-02-05 | 2013-06-12 | 山东大学 | Testing device and method of normal dynamic characteristic parameter of combination face |
-
2015
- 2015-05-13 CN CN201510240230.XA patent/CN105092136B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5557971A (en) * | 1993-12-17 | 1996-09-24 | Mitsubishi Denki Kabushiki Kaisha | Pressure sensor |
| CN1175685A (en) * | 1997-09-19 | 1998-03-11 | 清华大学 | High-stability quartz resonance type force sensor |
| CN1204051A (en) * | 1998-07-17 | 1999-01-06 | 清华大学 | Quartz resonance force/weighing sensor |
| US20060090566A1 (en) * | 2004-10-28 | 2006-05-04 | Denso Corporation | Pressure detection device |
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| CN1900724A (en) * | 2006-07-06 | 2007-01-24 | 重庆大学 | Differential piesoelectric two dimension acceleration sensor |
| CN101419101A (en) * | 2008-11-26 | 2009-04-29 | 大连理工大学 | Multi-point partial pre-fastening method with adjustable load sharing mechanism |
| CN101961702A (en) * | 2010-09-07 | 2011-02-02 | 天津理工大学 | Spin coating device used for quartz crystal |
| CN103133530A (en) * | 2011-11-30 | 2013-06-05 | 上海宇航***工程研究所 | Adjustable pressing force pressing sliding mechanism and adjustment method of adjustable pressing force pressing sliding mechanism |
| CN103149002A (en) * | 2013-02-05 | 2013-06-12 | 山东大学 | Testing device and method of normal dynamic characteristic parameter of combination face |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107588884A (en) * | 2017-08-08 | 2018-01-16 | 中国石油天然气集团公司 | One kind is with brill down-hole pressure measuring circuit and pressure measurement method |
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| CN105092136B (en) | 2017-11-03 |
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Granted publication date: 20171103 Termination date: 20190513 |