CN205228700U - A pressure sensor for detecting automobile -used urea solution - Google Patents
A pressure sensor for detecting automobile -used urea solution Download PDFInfo
- Publication number
- CN205228700U CN205228700U CN201521084221.8U CN201521084221U CN205228700U CN 205228700 U CN205228700 U CN 205228700U CN 201521084221 U CN201521084221 U CN 201521084221U CN 205228700 U CN205228700 U CN 205228700U
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- CN
- China
- Prior art keywords
- pressure core
- metallic membrane
- upper cover
- package casing
- protection circuit
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Abstract
The utility model provides a pressure sensor for detecting automobile -used urea solution, includes the electrical connector, the signal line, and the encapsulation shell, the upper cover, metal diaphragm pressure core and protection circuit board, there are two mounting holes encapsulation shell both sides, the top of encapsulation shell is equipped with the upper cover, and the upper cover passes through the colloid with the encapsulation shell and bonds, colloid bonding metal diaphragm pressure core is passed through to the bottom of encapsulation shell, installation protection circuit board in the encapsulation shell, and the protection circuit board is drawn forth the needle with the signal of metal diaphragm pressure core upper surface and is passed through solder connection, on the signal line pad of protection circuit board was received in the upper cover was passed to the one end of signal line signal line eyelet welding, the other end inserted in the mounting hole of electrical connector, metal diaphragm pressure core title page has that skew, the temperature of sensor are floated, non -linear modulate circuit, and radial opening there is the sealing washer mounting groove, and the forced induction off -plate of metal diaphragm pressure core has protection metal platform. The utility model discloses simple structure can deal with various low temperature bad weathers, and the range of application is wide.
Description
Technical field
The utility model belongs to sensor technical field, particularly relates to a kind of pressure transducer for inspection vehicle urea liquid.
Background technology
Sensor is a kind of pick-up unit, measured signal can be experienced, and can the signal experienced be detected, the information being for conversion into electric signal or other desired forms according to certain rules exports, to meet the requirements such as the transmission of information, process, storage, display, record and control.It is the primary link realizing automatically detecting and automatically controlling.
In prior art, it is large to there is volume in traditional pressure unit, cost is high, and urea for vehicle solution belongs to new application, it requires to use automotive grade product, volume is little, cost is low, can realize production in enormous quantities, and harsh cryogenic freezing condition lower sensor can be met do not damage, urea crystals situation lower sensor such as can not to lose efficacy at the condition, and this feature of not possessing of existing product exactly.
Therefore, provide design a kind of pressure transducer for inspection vehicle urea liquid, to solve the problems of the technologies described above, be necessary.
Utility model content
The purpose of this utility model is, for the defect that above-mentioned prior art exists, provide design a kind of pressure transducer for inspection vehicle urea liquid, meet miniaturization, with low cost, be convenient to the requirements such as batch production, to solve the problems of the technologies described above.
For achieving the above object, the utility model provides following technical scheme:
For a pressure transducer for inspection vehicle urea liquid, comprise electric connector, signal wire, package casing, upper cover, metallic membrane pressure core and protection circuit plate, is characterized in that: described package casing both sides have two mounting holes; The top of described package casing is provided with upper cover, and described upper cover is bonding by colloid with package casing; The bottom of described package casing is by colloid bonded metal diaphragm pressure core body, and install protection circuit plate in described package casing, described protection circuit plate is drawn pin with the signal of metallic membrane pressure core upper surface and is connected by soldering; One end of described signal wire is received on the signal wire pad of protection circuit plate through the signal wire eyelet welding of upper cover, and the other end inserts in the mounting hole of electric connector;
Seal the off-centre circuit of sensor in described metallic membrane pressure core up for safekeeping, temperature drift circuit and non-linear modulate circuit, described metallic membrane pressure core also comprises pressure sensitive face, stainless steel diaphragm, the silicon layer of sealing, oil sealing steel ball and sensitive chip; Described metallic membrane pressure core radial direction has O-ring seal mounting groove, has a circle protection metal platform outside the pressure sensitive face of described metallic membrane pressure core.
Preferably, the pressure sensitive face of described metallic membrane pressure core is circular.
Preferably, the width of described O-ring seal mounting groove is 2mm, and the degree of depth is 1mm.
Adopt the mounting means of side seal, use, easy to maintenance, make O-ring seal have the longer life-span.
Preferably, the mounting hole embedded metal circle of described package casing both sides.
By the mode of the mounting hole embedded metal circle on package casing, the firmly excessive package casing that causes is avoided in installation process to be out of shape.
Preferably, described protection metal platform exceeds pressure sensitive face 2mm.
Establish the mode of protection metal platform by the outer, pressure sensitive face of giving in metallic membrane pressure core, prevent the pressure sensitive face of metallic membrane pressure core to collide with distortion, cause the utility model urea pressure transducer output valve inaccurate.
Preferably, the quantity of described signal wire is 3.
The beneficial effects of the utility model are, a kind of pressure transducer for inspection vehicle urea liquid, has without the need to tracting pressuring hole, and structure is simple, and long service life, can tackle various low temperature inclement weather, the advantage that range of application is wide.The utility model have employed metallic membrane pressure core, and metallic membrane pressure core is all sealed the skew of sensor, temperature drift, irrational modulate circuit up for safekeeping, and can not be disassembled, and prevents external environmental factor from damaging it, protects the stability of its index; Impressed pressure is delivered on sensitive chip by the silicone oil of stainless steel diaphragm, inner sealing, and sensitive chip does not directly contact measured medium, the structure of whole solid state that mineralization pressure is measured; Package casing inside is provided with protection circuit plate, be connected with metallic membrane pressure core, protection circuit plate there are filtering, anti-jamming circuit, be welded with TVS pipe simultaneously, there is the effect of anti surge voltage electric current, metallic membrane pressure core can be protected, avoid external voltage, current interference, or high-voltage pulse signal causes damage to sensor; The internal signal of metallic membrane pressure core leads to electric connector by signal wire.
In addition, the utility model design concept is reliable, and structure is simple, has application prospect widely.
As can be seen here, the utility model compared with prior art, has substantive distinguishing features and progress, and its beneficial effect implemented also is apparent.
Accompanying drawing explanation
Fig. 1 is the diagrammatic cross-section of a kind of pressure transducer for inspection vehicle urea liquid that the utility model provides.
Wherein, 1-electric connector, 2-signal wire, 3-upper cover, 4-protection circuit plate, 5-metallic membrane pressure core, 6-mounting hole, 7-package casing, 8-O-ring seal mounting groove, 9-protects metal platform, 10-pressure sensitive face, 11-oil sealing steel ball.
Embodiment
Below in conjunction with accompanying drawing, also by specific embodiment, the utility model is elaborated, and following examples are to explanation of the present utility model, and the utility model is not limited to following embodiment.
As shown in Figure 1, a kind of pressure transducer for inspection vehicle urea liquid that the utility model provides, comprises electric connector 1, signal wire 2, package casing 7, upper cover 3, metallic membrane pressure core 5 and protection circuit plate 9, described package casing 7 both sides have two mounting holes 6; The top of described package casing 7 is provided with upper cover 3, and described upper cover 3 is bonding by colloid with package casing 7; The bottom of described package casing 7 is by colloid bonded metal diaphragm pressure core body 5, and install protection circuit plate 4 in described package casing 7, described protection circuit plate 4 is drawn pin with the signal of metallic membrane pressure core 5 upper surface and is connected by soldering; One end of described signal wire 2 is received on the signal wire pad of protection circuit plate 4 through the signal wire eyelet welding of upper cover 3, and the other end inserts in the mounting hole of electric connector 1;
Seal the off-centre circuit of sensor in described metallic membrane pressure core 5 up for safekeeping, temperature drift circuit and non-linear modulate circuit, described metallic membrane pressure core 5 also comprises pressure sensitive face 10, stainless steel diaphragm, the silicon layer of sealing, oil sealing steel ball and sensitive chip; Described metallic membrane pressure core 5 radial direction has O-ring seal mounting groove 8, has a circle protection metal platform 9 outside the pressure sensitive face 10 of described metallic membrane pressure core 5.
In the present embodiment, the pressure sensitive face 10 of described metallic membrane pressure core 5 is circular.
In the present embodiment, the width of described O-ring seal mounting groove 8 is 2mm, and the degree of depth is 1mm.
Adopt the mounting means of side seal, use, easy to maintenance, make O-ring seal have the longer life-span.
In the present embodiment, the mounting hole 6 embedded metal circle of described package casing 7 both sides.
Package casing 7 of the present utility model adopts PA66-GF30 nylon material, by the mode of the mounting hole 6 embedded metal circle on package casing 7, to avoid in installation process the firmly excessive package casing 7 that causes to be out of shape.
In the present embodiment, described protection metal platform 9 exceeds pressure sensitive face 2mm.
Establish the mode of protection metal platform 9 by the outer, pressure sensitive face 10 of giving in metallic membrane pressure core 5, prevent the pressure sensitive face 10 of metallic membrane pressure core 5 to collide with distortion, cause the utility model urea pressure transducer output valve inaccurate.
In the present embodiment, the quantity of described signal wire 2 is 3.
A kind of pressure transducer for inspection vehicle urea liquid that the utility model provides, has without the need to tracting pressuring hole, and structure is simple, and long service life, can tackle various low temperature inclement weather, the advantage that range of application is wide.The utility model have employed metallic membrane pressure core 5 and the skew of sensor, temperature drift, irrational modulate circuit is all sealed up for safekeeping, and can not be disassembled, and prevents external environmental factor from damaging it, protects the stability of its index; Impressed pressure is delivered on sensitive chip by the silicone oil of stainless steel diaphragm, inner sealing, and sensitive chip does not directly contact measured medium, the structure of whole solid state that mineralization pressure is measured; Package casing 7 inside is provided with protection circuit plate 4, be connected with metallic membrane pressure core 5, protection circuit plate 4 there are filtering, anti-jamming circuit, be welded with TVS pipe simultaneously, there is the effect of anti surge voltage electric current, metallic membrane pressure core 5 can be protected, avoid external voltage, current interference, or high-voltage pulse signal causes damage to sensor; Protection circuit plate 7 there is via pad; signal via pad being inserted in metallic membrane pressure core 8 upper surface is drawn on pin; by soldering connection metal diaphragm pressure core body 8 and protection circuit plate 7, the internal signal of metallic membrane pressure core 5 leads to electric connector 1 by signal wire 2.Be provided with bonding groove bottom package casing 7, metallic membrane pressure core 5 top surface edge bonded to bottom package casing 7 in bonding groove by epoxy resin bonding glue; Package casing 7 upper surface is provided with mounting groove, is used by upper cover 3 in the gluing mounting groove receiving package casing 7 of epoxy resin bonding.
Preferred implementation of the present utility model is only above; but the utility model is not limited thereto; any those skilled in the art can think there is no creationary change; and do not departing from the some improvements and modifications done under the utility model principle prerequisite, all should drop in protection domain of the present utility model.
Claims (6)
1. for a pressure transducer for inspection vehicle urea liquid, comprise electric connector, signal wire, package casing, upper cover, metallic membrane pressure core and protection circuit plate, is characterized in that: described package casing both sides have two mounting holes; The top of described package casing is provided with upper cover, and described upper cover is bonding by colloid with package casing; The bottom of described package casing is by colloid bonded metal diaphragm pressure core body, and install protection circuit plate in described package casing, described protection circuit plate is drawn pin with the signal of metallic membrane pressure core upper surface and is connected by soldering; One end of described signal wire is received on the signal wire pad of protection circuit plate through the signal wire eyelet welding of upper cover, and the other end inserts in the mounting hole of electric connector;
Seal the off-centre circuit of sensor in described metallic membrane pressure core up for safekeeping, temperature drift circuit and non-linear modulate circuit, described metallic membrane pressure core also comprises pressure sensitive face, stainless steel diaphragm, the silicon layer of sealing, oil sealing steel ball and sensitive chip; Described metallic membrane pressure core radial direction has O-ring seal mounting groove, has a circle protection metal platform outside the pressure sensitive face of described metallic membrane pressure core.
2. a kind of pressure transducer for inspection vehicle urea liquid as claimed in claim 1, is characterized in that: the pressure sensitive face of described metallic membrane pressure core is for circular.
3. a kind of pressure transducer for inspection vehicle urea liquid as claimed in claim 1 or 2, is characterized in that: the width of described O-ring seal mounting groove is 2mm, and the degree of depth is 1mm.
4. a kind of pressure transducer for inspection vehicle urea liquid as claimed in claim 3, is characterized in that: the mounting hole embedded metal circle of described package casing both sides.
5. a kind of pressure transducer for inspection vehicle urea liquid as claimed in claim 4, is characterized in that: described protection metal platform exceeds pressure sensitive face 2mm.
6. a kind of pressure transducer for inspection vehicle urea liquid as claimed in claim 5, is characterized in that: the quantity of described signal wire is 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521084221.8U CN205228700U (en) | 2015-12-23 | 2015-12-23 | A pressure sensor for detecting automobile -used urea solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521084221.8U CN205228700U (en) | 2015-12-23 | 2015-12-23 | A pressure sensor for detecting automobile -used urea solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205228700U true CN205228700U (en) | 2016-05-11 |
Family
ID=55903757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521084221.8U Expired - Fee Related CN205228700U (en) | 2015-12-23 | 2015-12-23 | A pressure sensor for detecting automobile -used urea solution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205228700U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107543644A (en) * | 2017-10-17 | 2018-01-05 | 雷念程 | Quick response diaphragm pressure sensor and its manufacture method |
| CN107655620A (en) * | 2016-07-26 | 2018-02-02 | 盾安传感有限公司 | Packaging part and the method for encapsulating sensor |
| CN111307365A (en) * | 2020-03-24 | 2020-06-19 | 东莞市迈沃科技发展有限公司 | Pressure sensor |
-
2015
- 2015-12-23 CN CN201521084221.8U patent/CN205228700U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655620A (en) * | 2016-07-26 | 2018-02-02 | 盾安传感有限公司 | Packaging part and the method for encapsulating sensor |
| CN107543644A (en) * | 2017-10-17 | 2018-01-05 | 雷念程 | Quick response diaphragm pressure sensor and its manufacture method |
| CN111307365A (en) * | 2020-03-24 | 2020-06-19 | 东莞市迈沃科技发展有限公司 | Pressure sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160511 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |