CN203274977U - Pressure sensor - Google Patents
Pressure sensor Download PDFInfo
- Publication number
- CN203274977U CN203274977U CN 201320130622 CN201320130622U CN203274977U CN 203274977 U CN203274977 U CN 203274977U CN 201320130622 CN201320130622 CN 201320130622 CN 201320130622 U CN201320130622 U CN 201320130622U CN 203274977 U CN203274977 U CN 203274977U
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- mechanical interface
- shell
- pressure transducer
- fixed
- right cylinder
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Abstract
The utility model discloses a pressure sensor, which comprises a pressure sensing transmission unit, a threaded mechanical interface and a shell, wherein the threaded mechanical interface and the shell are mutually independent and fixed together in a matched manner, and the threaded mechanical interface is connected with the pressure sensing transmission unit. According to the utility model, the pressure sensor is divided into the threaded mechanical interface and the shell through studying the distribution of pressure born by the pressure sensor, thereby being capable of respectively processing and manufacturing the threaded mechanical interface and the shell objectively. As for the threaded mechanical interface which is responsible for pressure bearing and pressure sensing, a qualitative material can be selected in manufacturing, and high requirements can be proposed independently in the aspect of processing technical indicators. As for the shell, an ordinary material can be selected in manufacturing, and requirements can be lowered appropriately in the aspect of the processing technical indicators. Obviously, the pressure sensor disclosed by the utility model is not only simple in structure, but also can obviously reduce the production cost of the pressure sensor greatly.
Description
Technical field
The utility model relates to a kind of industrial sensor parts, particularly relates to a kind of pressure transducer.
Background technology
Pressure transducer is a kind of sensor the most commonly used in industrial practice, and our normally used pressure transducer mainly utilizes the piezoelectric effect manufacturing to form, and such sensor is also referred to as piezoelectric sensor.We know, crystal is anisotropic, and noncrystal is isotropic.Some crystal medium when being subject to mechanical force along certain orientation and deforming, has just produced polarization effect; After mechanical force removes, can come back to uncharged state again, when namely being under pressure, some crystal may produce the effect of electricity, so-called polarization effect that Here it is.Scientist has developed pressure transducer according to this effect exactly.
Certainly, pressure transducer of a great variety is as resistance strain gage pressure transducer, semiconductor gauge pressure transducer, piezoresistive pressure sensor, inductance pressure transducer, capacitance pressure transducer,, resonance type pressure sensor and capacitance acceleration transducer etc.But what be most widely used is piezoresistive pressure sensor, and it has extremely low price and higher precision and linear characteristic preferably.
When understanding piezoresistive force sensor, at first we be familiar with this element of resistance strain gage.Resistance strain gage is a kind of Sensitive Apparatus that strain variation on measured piece is converted into a kind of electric signal.It is one of chief component of pressure resistance type strain transducer.It is two kinds of metal resistance strain gauge and semiconductor gauges that resistance strain gage is used maximum.Metal resistance strain gauge has again two kinds of thread foil gauge and metal forming shape foil gauges.Normally foil gauge is bonded in closely by special bonding agent and produces on mechanics strain matrix, when the stressed generation STRESS VARIATION of matrix, resistance strain gage also produces deformation together, and the resistance of foil gauge is changed, and is added in ohmically voltage and changes thereby make.The change in resistance that this foil gauge produces when stressed is usually less, and general this foil gauge all forms strain bridge, and amplifies by follow-up instrument amplifier, then is transferred to treatment circuit (normally A/D conversion and CPU) and shows or topworks.
From the operating position of present pressure transducer, normally used pressure transducer price comparison is high, and its reason comprises that pressure transducer is higher to the quality requirements of pressure bearing element and inductor.For guaranteeing to use safety and pressure sensing sensitivity, it is that cost accounting must not irrespective major issue that the pressure transducer of industrial use must keep higher quality requirements to the pressure bearing element.
In the situation that keep pressure transducer to using the technology such as safety and pressure sensing sensitivity and safety index substantially constant, how from the structural design of pressure transducer, by technique improvement reduce production costs just become industry the important topic being badly in need of solving.
Summary of the invention
Technical problem to be solved in the utility model is, provides a kind of and can reduce production costs, pressure transducer simple in structure.
For solving above technical matters, the technical solution of the utility model is: a kind of pressure transducer, comprise the pressure sensitive transmission unit, its key is: also comprise separate screw-type mechanical interface and shell, described screw-type mechanical interface is fixed with described shell is in the same place, and described screw-type mechanical interface is connected with described pressure sensitive transmission unit.
Wherein, as optimal technical scheme of the present utility model: described screw-type mechanical interface is made of the bolt, the second cylinder and the first cylinder that connect successively, the diameter of described the second cylinder is less than the diameter of described the first cylinder, described bolt, described the second cylinder and described the first cylinder are structure as a whole, and described bolt is provided with blind hole along central axial direction; Described shell comprises hexagon head hollow structure and sleeve, and described hexagon head hollow structure and described sleeve are fixed with each other or be structure as a whole.Described bolt and described hexagon head hollow structure weld together.
Particularly, the inboard of described hexagon head hollow structure is provided with the projective structure body, the top of described bolt is provided with the nose-circle cylinder, the maximum inscribed circle diameter that described projective structure body inner edge surrounds is more than or equal to the diameter of described the first cylinder, but less than the cylindrical minimum outside diameter in described top, described projective structure body is bulge loop or symmetrically arranged boss.
Embodiment 1: described nose-circle cylinder is made of the three cylindrical body that mutually is structure as a whole and the 4th right cylinder, the diameter of described three cylindrical body is less than the described the 4th cylindrical diameter, the lateral surface of described three cylindrical body matches with the medial surface of described hexagon head hollow structure, and the described the 4th cylindrical upper surface is welded and fixed with the lower surface of described hexagon head hollow structure.
Embodiment 2: the cylindrical lateral surface in described top is welded and fixed with the medial surface of described hexagon head hollow structure.
as the utility model further instruction, described screw-type mechanical interface is provided with inductor, substrate sticking is on described screw-type mechanical interface, the binding wiring board that connects with described inductor sticks on described substrate, middle wiring board is fixed on described binding wiring board by row's pin, output circuit board is connected with described middle wiring board by the first flexible circuit board with the subassembly of shielding copper sheet, one end and the described output circuit board of the second flexible circuit board are welded and fixed, the other end of described the second flexible circuit board is welded and fixed with bonder terminal or output core, described screw-type mechanical interface and described shell are welded and fixed.
Wherein, an end of cable outlet or described bonder terminal is pressed together on by O-ring seal on the interior step of described shell, and the other end of described cable outlet or described bonder terminal is fixed by described shell crimping mode.
By implementing the utility model, desirable following useful technique effect:
The utility model will be divided into screw-type mechanical interface and shell by the pressure distribution of research pressure transducer on pressure transducer, thereby in processing respectively and the making that objectively can realize double thread formula mechanical interface and shell.Can select quality matetrial to make to the screw-type mechanical interface of bearing pressure bearing and presser sensor requirement, can propose separately higher requirement on the process technology index.Can select common material to shell, also can be suitable on the process technology index lower the requirement.This screw-type mechanical interface and shell be the technical scheme of processing and fabricating respectively, and be not only simple in structure, and obviously can greatly reduce the production cost of pressure transducer.
Described bolt is provided with blind hole along central axial direction, be conducive to take full advantage of the liquid of measured medium, make measured medium can act on described the second cylinder and described the first cylinder, and make the upper surface of described the first cylinder produce distortion under the measured medium pressure-acting.Because described the first cylinder is connected with described pressure sensitive transmission unit, thereby the compressive deformation that is conducive to described the first cylinder upper surface that the pressure conduction with measured medium causes is converted to distortion and the resistance variations (the perhaps variation of voltage, electric current etc.) of described inductor, thereby realizes pressure sensitive and transmission.
The diameter of described the second cylinder is conducive to effective conduction of economical with materials and pressure less than the diameter of described the first cylinder.Described screw-type mechanical interface comprises bolt arrangement, and being conducive to pressure transducer described in the utility model can be installed on relevant equipment under test very easily.
The lateral surface of described hexagon head hollow structure is hexagon head structure, its inside is hollow structure, described hexagon head hollow structure and described sleeve are all hidden parts for palpuses such as accommodating described pressure sensitive transmission units, and described hexagon head hollow structure also is used for the part-structure of accommodating described screw-type mechanical interface.Because the lateral surface of described hexagon head hollow structure is hexagon head structure, thereby after described hexagon head hollow structure and described screw-type mechanical interface are welded and fixed, can with instruments such as wrench, pressure transducer described in the utility model be fixed on the pressure Devices to test very easily.
The inboard of described hexagon head hollow structure is provided with the projective structure body, the top of described bolt is provided with the nose-circle cylinder, the maximum inscribed circle diameter that described projective structure body inner edge surrounds is more than or equal to the diameter of described the first cylinder, but less than the cylindrical minimum outside diameter in described top, described projective structure body is bulge loop or symmetrically arranged boss.Obviously, by implementing this organization plan, described projective structure body can effectively prop up described screw-type mechanical interface, thereby the location is convenient, reliable in the weld job process of described screw-type mechanical interface and described shell; In the time of can preventing from welding in addition, the foreign material such as liquid scolding tin flow in described hexagon head hollow structure, thereby avoid the second cylinder and/or described the first cylinder are produced harmful effect.
About the welding of described nose-circle cylinder and described hexagon head hollow structure, can adopt dual mode: the first is that the 4th cylindrical upper surface of described nose-circle cylinder is welded and fixed with the lower surface of described hexagon head hollow structure; The second is that the cylindrical lateral surface in described top is welded and fixed with the medial surface of described hexagon head hollow structure.
Describe from structure, these two kinds of welding manners can realize that all described screw-type mechanical interface and shell fix.Its difference is that the weld job mode is different, and is different to the processing request of described bolt.
Pressure sensitive transmission unit described in the utility model specifically can comprise following interconnective parts: inductor, the binding wiring board that connects with described inductor, by row's pin be fixed on middle wiring board on described binding wiring board, by the first flexible circuit board with described in the middle of the output circuit board that is connected of wiring board and the subassembly that shields copper sheet, the bonder terminal that is connected with described output circuit board by described the second flexible circuit board or export core.
Wherein, substrate sticking is on described screw-type mechanical interface, described binding wiring board sticks on described substrate, one end of cable outlet or described bonder terminal is pressed together on by O-ring seal on the interior step of described shell, and the other end of described cable outlet or described bonder terminal is fixed by described shell crimping mode.
Obviously, by the above-mentioned concrete scheme of described pressure sensitive transmission unit, can transmit the change in voltage that inductor produces because of compressive deformation rapidly feeding back on relevant pressure detection output device, realize induction and the output of pressure.
Description of drawings
The utility model is described in more detail below in conjunction with Figure of description, wherein:
Fig. 1 is the enforcement structural drawing that the utility model is installed the Packard connector;
Fig. 2 is the enforcement structural drawing that the utility model is installed the DIN43650 connector;
Fig. 3 is the enforcement structural drawing that the utility model is installed core;
Fig. 4 is the enforcement structural drawing that the utility model is installed the BOSCH connector;
Fig. 5 is that the utility model screw-type mechanical interface and shell fit structure partly cut open schematic diagram one;
Fig. 6 is that the utility model screw-type mechanical interface and shell fit structure partly cut open schematic diagram two.
Embodiment
As shown in any figure in Fig. 1 to 4, a kind of pressure transducer, comprise pressure sensitive transmission unit, separate screw-type mechanical interface 101 and shell 110, described shell 110 comprises hexagon head hollow structure 1101 and sleeve 1102, and described hexagon head hollow structure 1101 and described sleeve 1102 are fixed with each other or be structure as a whole.Described screw-type mechanical interface 101 is fixed with described shell 110 is in the same place, and described screw-type mechanical interface 101 is connected with described pressure sensitive transmission unit.
pressure sensitive transmission unit described in the utility model can specifically comprise following interconnective parts: inductor 102, binding wiring board 104 with described inductor 102 connections, be fixed on middle wiring board 106 on described binding wiring board 104 by row's pin 105, by the first flexible circuit board 107 and described middle wiring board 106 output circuit board 108 that is connected and the subassembly that shields copper sheet 109, the bonder terminal that is connected with described output circuit board 108 by described the second flexible circuit board 111 or output core.
Wherein, described inductor 102 can or be crystal etc. for resistance strain gage, induction chip, and the element that other industries are generally acknowledged can be converted to mechanically deform resistance variations or voltage, current signal changes or other can identify change in electric etc. also can be suitable in the utility model.
In addition, need to prove at this, pressure sensitive transmission unit described in the utility model is not limited only to electronics link as above and syndeton, and is that any industry is generally acknowledged, mechanically deform can be converted to resistance variations or voltage, current signal changes or other discernible signals change and this variation is transferred to electronic circuit, electronic installation or circuit board on output device, electronic component etc. all applicable to the utility model.In other words, any change (distortion or replace) pressure sensitive transmission unit but utilize his technical characterictic of the utility model and the technical scheme that forms all belongs to the row of protection of the present utility model.
As shown in Figure 1, described bonder terminal is Packard connector 113; As shown in Figure 2, described bonder terminal is DIN43650 connector 213; As shown in Figure 3, described output circuit board 108 is connected with output core 315 by flexible circuit board 111, adopts heat-shrink tube 314 that cable outlet 313 and described output core 315 is fastening; As shown in Figure 4, described bonder terminal is BOSCH connector 413.
Wherein, as shown in arbitrary figure in Fig. 1 to 4, substrate 103 sticks on described screw-type mechanical interface 101, described binding wiring board 104 sticks on described substrate 103, one end of cable outlet 313 or described bonder terminal is pressed together on by two O-ring seals 112 on the interior step (not shown) of described shell 110, and the other end of described cable outlet 313 or described bonder terminal is fixed by described shell 110 crimping modes.Crimping herein refers to fixture shell 110 crimpings and fixing described cable outlet 313 or described connector 113,213 or 413.
As shown in Fig. 5 or 6, described screw-type mechanical interface 101 is made of the bolt 1011, the second right cylinder 1013 and the first right cylinder 1012 that connect successively, the diameter of described the second right cylinder 1013 is less than the diameter of described the first right cylinder 1012, described bolt 1011, described the second right cylinder 1013 and described the first right cylinder 1012 are structure as a whole, described bolt 1011 is provided with blind hole 1015 along central axial direction, and described the first right cylinder 1012 is connected with described pressure sensitive transmission unit.
The inboard of described hexagon head hollow structure 1101 is provided with projective structure body 1103, the top of described bolt 1011 is provided with nose-circle cylinder 1014, the maximum inscribed circle diameter that described projective structure body 1103 inner edges surround is more than or equal to the diameter of described the first right cylinder 1012, but less than the minimum outside diameter of described nose-circle cylinder 1014, described projective structure body 1103 is bulge loop or symmetrically arranged boss.
As shown in Figure 5, the lateral surface of described nose-circle cylinder 1014 is welded and fixed with the medial surface of described hexagon head hollow structure 1101, and forms welded structure 1016.
As shown in Figure 6, described nose-circle cylinder 1014 is made of the three cylindrical body 10141 that mutually is structure as a whole and the 4th right cylinder 10142, the diameter of described three cylindrical body 10141 is less than the diameter of described the 4th right cylinder 10142, the lateral surface of described three cylindrical body 10141 matches with the medial surface of described hexagon head hollow structure 1101, the upper surface of described the 4th right cylinder 10142 is welded and fixed with the lower surface of described hexagon head hollow structure 1101, and forms welded structure 1017.
Must be pointed out, some indefinitenesses that above-described embodiment is just made the utility model illustrate.But person of skill in the art will appreciate that, do not departing under aim of the present utility model and scope, can make modification to the utility model, replace and change, these modifications, replacement and change still belong to protection domain of the present utility model.
Claims (10)
1. pressure transducer, comprise the pressure sensitive transmission unit, it is characterized in that: also comprise separate screw-type mechanical interface (101) and shell (110), described screw-type mechanical interface (101) and described shell (110) are fixed together, and described screw-type mechanical interface (101) is connected with described pressure sensitive transmission unit.
2. a kind of pressure transducer according to claim 1, it is characterized in that: described screw-type mechanical interface (101) is by the bolt (1011) that connects successively, the second right cylinder (1013) and the first right cylinder (1012) consist of, the diameter of described the second right cylinder (1013) is less than the diameter of described the first right cylinder (1012), described bolt (1011), described the second right cylinder (1013) and described the first right cylinder (1012) are structure as a whole, described bolt (1011) is provided with blind hole (1015) along central axial direction, described the first right cylinder (1012) is connected with described pressure sensitive transmission unit.
3. a kind of pressure transducer according to claim 2, it is characterized in that: described shell (110) comprises hexagon head hollow structure (1101) and sleeve (1102), and described hexagon head hollow structure (1101) and described sleeve (1102) are fixed with each other or be structure as a whole.
4. a kind of pressure transducer according to claim 3 is characterized in that: described bolt (1011) welds together with described hexagon head hollow structure (1101).
5. a kind of pressure transducer according to claim 4, it is characterized in that: the inboard of described hexagon head hollow structure (1101) is provided with projective structure body (1103), the top of described bolt (1011) is provided with nose-circle cylinder (1014), the maximum inscribed circle diameter that described projective structure body (1103) inner edge surrounds is more than or equal to the diameter of described the first right cylinder (1012), but less than the minimum outside diameter of described nose-circle cylinder (1014), described projective structure body (1103) is bulge loop or symmetrically arranged boss.
6. a kind of pressure transducer according to claim 5, it is characterized in that: described nose-circle cylinder (1014) is made of the three cylindrical body (10141) that mutually is structure as a whole and the 4th right cylinder (10142), the diameter of described three cylindrical body (10141) is less than the diameter of described the 4th right cylinder (10142), the lateral surface of described three cylindrical body (10141) matches with the medial surface of described hexagon head hollow structure (1101), the upper surface of described the 4th right cylinder (10142) is welded and fixed with the lower surface of described hexagon head hollow structure (1101).
7. a kind of pressure transducer according to claim 5, it is characterized in that: the lateral surface of described nose-circle cylinder (1014) is welded and fixed with the medial surface of described hexagon head hollow structure (1101).
8. a kind of pressure transducer according to claim 1, it is characterized in that: described shell (110) comprises hexagon head hollow structure (1101) and sleeve (1102), and described hexagon head hollow structure (1101) and described sleeve (1102) are fixed with each other or be structure as a whole.
9. the described a kind of pressure transducer of any one claim according to claim 1 to 8, it is characterized in that: described pressure sensitive transmission unit comprises inductor (102), described inductor (102) is located on described screw-type mechanical interface (101), substrate (103) sticks on described screw-type mechanical interface (101), the binding wiring board (104) that connects with described inductor (102) sticks on described substrate (103), middle wiring board (106) is fixed on described binding wiring board (104) by row's pin (105), output circuit board (108) is connected with described middle wiring board (106) by the first flexible circuit board (107) with the subassembly of shielding copper sheet (109), one end of the second flexible circuit board (111) and described output circuit board (108) are welded and fixed, the other end of described the second flexible circuit board (111) is welded and fixed with bonder terminal or output core, described screw-type mechanical interface (101) is welded and fixed with described shell (110).
10. a kind of pressure transducer according to claim 9, it is characterized in that: an end of cable outlet (313) or described bonder terminal is pressed together on by O-ring seal (112) on the interior step of described shell (110), and the other end of described cable outlet (313) or described bonder terminal is fixed by described shell (110) crimping mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320130622 CN203274977U (en) | 2013-03-21 | 2013-03-21 | Pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320130622 CN203274977U (en) | 2013-03-21 | 2013-03-21 | Pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203274977U true CN203274977U (en) | 2013-11-06 |
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ID=49505361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320130622 Withdrawn - After Issue CN203274977U (en) | 2013-03-21 | 2013-03-21 | Pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203274977U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062046A (en) * | 2013-03-21 | 2014-09-24 | 精亮科技（深圳）有限公司 | Pressure sensor |
| CN105782193A (en) * | 2016-04-27 | 2016-07-20 | 中国兵器装备集团摩托车检测技术研究所 | Self-tapping-type adapter used for assembling rod-type sensor on pressure vessel |
| CN108463704A (en) * | 2016-01-14 | 2018-08-28 | 阿自倍尔株式会社 | Pressure sensor |
-
2013
- 2013-03-21 CN CN 201320130622 patent/CN203274977U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062046A (en) * | 2013-03-21 | 2014-09-24 | 精亮科技（深圳）有限公司 | Pressure sensor |
| CN104062046B (en) * | 2013-03-21 | 2016-06-22 | 精亮科技（深圳）有限公司 | A kind of pressure transducer |
| CN108463704A (en) * | 2016-01-14 | 2018-08-28 | 阿自倍尔株式会社 | Pressure sensor |
| CN108463704B (en) * | 2016-01-14 | 2020-02-07 | 阿自倍尔株式会社 | Pressure sensor |
| CN105782193A (en) * | 2016-04-27 | 2016-07-20 | 中国兵器装备集团摩托车检测技术研究所 | Self-tapping-type adapter used for assembling rod-type sensor on pressure vessel |
| CN105782193B (en) * | 2016-04-27 | 2018-06-29 | 中检西部检测有限公司 | For rod-type sensor to be mounted on to the self-tapping type crossover sub on pressure vessel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131106 Effective date of abandoning: 20160622 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |