CN202853838U - Vacuum pressure transducer apparatus for vehicles - Google Patents
Vacuum pressure transducer apparatus for vehicles Download PDFInfo
- Publication number
- CN202853838U CN202853838U CN 201220410081 CN201220410081U CN202853838U CN 202853838 U CN202853838 U CN 202853838U CN 201220410081 CN201220410081 CN 201220410081 CN 201220410081 U CN201220410081 U CN 201220410081U CN 202853838 U CN202853838 U CN 202853838U
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- vacuum pressure
- port
- pressure sensor
- electronic module
- module assembly
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Abstract
Disclosed is a vacuum pressure transducer apparatus, comprising a housing having a cavity, a cover sealing the cavity from the upper surface, and an electronic module assembly located inside the cavity. The vacuum pressure transducer apparatus of the utility model is characterized in that the electronic module assembly comprises a pressure sensing element, an ASIC, and an insulating passive element which are integrated upon a printed circuit board; the housing further comprises an electrical connector port; and the electrical connector port is provided with at least one press fit pin used for fixing the electronic module assembly to the interior of the cavity of the housing and establishing an electrical connection between the electronic module assembly and the electrical connector port. The vacuum pressure transducer apparatus of the utility model features small size, simple and compact structure, practicality, and strong operationality.
Description
Technical field
The utility model relates to the vacuum pressure sensor device, particularly for the vacuum pressure sensor device of motor vehicle.
Background technology
Vacuum pressure sensor is a kind of pressure transducer commonly used in the industrial practice, and it is widely used in various industrial automatic control environment, relates to numerous industries such as communications and transportation, Aero-Space, military project, vacuum equipment.
The general work principle of automobile-use vacuum pressure sensor is: the pressure of automobile vacuum booster acts directly on the sensitive diaphragm that is attached thereto the sensor that connects, make sensitive diaphragm produce the little distortion that is directly proportional with vacuum pressure, thereby the resistance of sensor is changed, by electronic circuit detect this variation and with one of its conversion output corresponding to the standard signal of this pressure to control circuit.
In order to guarantee the precision of diaphragm circuit, reliably analog signal conversion is become digital signal, available most of vacuum pressure sensors need to utilize artificial adjustment or laser resistor trimming circuit to carry out temperature and sensitivity compensation usually in the market, and utilize discharge circuit that the simulating signal that records is processed.This has caused whole size sensor larger, the structure relative complex, and transducer calibration process and technique are loaded down with trivial details.
Summary of the invention
Therefore, in order to solve the problems of the technologies described above, the utility model proposes a kind of vacuum pressure sensor device, this vacuum pressure sensor device comprises the housing with chamber and the electronic module assembly that is positioned at described chamber interior, it is characterized in that, described electronic module assembly comprises the pressure sensor that is integrated on the printed circuit board (PCB), described housing further comprises the electrical cnnector port, and this electrical cnnector port has for the chamber interior that described electronic module assembly is fixed to described housing and set up at least one press fit pin of electrical connection between described electronic module assembly and electrical cnnector port.
Preferably, described press fit pin has and is positioned at head described chamber, that have the elastic region, and described electronic module assembly has groove corresponding with described head, that insert for described head.
Preferably, the size of described groove is less than the full-size of the described elastic region of described head, thereby when described head is inserted through described groove, realize being connected with the solderless press fit of described groove by described elastic region, thereby described electronic module assembly is fixed in the chamber of described housing.
Preferably, the quantity of described press fit pin is three.
Preferably, described press fit pin is made by the aldary sill with tin/nickel coating.
Preferably, described groove is electroplating ventilating hole.
Preferably, described electrical cnnector port is the Client application port of demarcating described sensor under different temperatures, comprise power supply, and output signal end.
Preferably, the electrical cnnector port is connected with ASIC through described press fit pin, to realize the demarcation to sensor.
Preferably, described housing further comprises the pressure survey port, and this pressure survey port is elongated hollow cylindrical shape, is suitable for being connected with vacuum booster by flexible pipe.
Preferably, described housing also comprises the bottom that is positioned at described housing and is close to the water proof and dust proof diaphragm that described pressure port is arranged.
Whole size sensor according to vacuum pressure sensor device of the present utility model is little, simple in structure, compact, flexible; Directly utilize the electrical connection port that sensor is demarcated, and directly utilize the temperature variant characteristic of sensitive element silicon diaphragm resistance to carry out temperature sensing and compensation and not be used in integrated temperature measurement function among the ASIC, can repeatedly demarcate sensor, thereby complicacy and the cost of calibration process have been reduced, so that sensor device production efficiency is high, rejection rate is low, workable.
Description of drawings
Referring now to following instructions and accompanying drawing device of the present utility model is described further, in the accompanying drawings:
Fig. 1 is the perspective schematic view according to automobile-use vacuum pressure sensor device of the present utility model;
Fig. 2 is that the sensor device of Fig. 1 is along the longitudinal sectional view of I-I line;
Fig. 3 is the local enlarged perspective of sensor device when electronic module assembly not being installed of Fig. 1, and wherein shows the press fit pin;
Fig. 4 is from the schematic, bottom view according to automobile-use vacuum pressure sensor device of the present utility model, shows water-proof film.
Embodiment
Referring to Fig. 1, the figure shows automobile-use vacuum pressure sensor device 1 of the present utility model first.In order clearly to describe according to automobile-use vacuum pressure sensor of the present utility model, adopted such as " on ", the direction term such as D score, " left side ", " right side ".But what be obvious, however, to one skilled in the art, that is, more than the orientation that provides by reference to the accompanying drawings should be as to restriction of the present utility model.
As illustrated in fig. 1, housing 2 further comprises chamber 11.During assembling, this chamber 11 inside are placed and be fixed on to electronic module assembly 3.Electronic module assembly 3 comprises pressure sensor 9, the ASIC(special IC that is integrated on the printed circuit board (PCB) (PCB), and English full name is " Application-specific integrated circuit ") 8 and the insulation passive element 14.In the present embodiment, the pressure sensor 9 that is used for the vacuum pressure of explorer motor-car vacuum booster is made by MEMS technique.ASIC is used for receiving the also detection signal of processing pressure sensing element 9, also is used for sensor is demarcated.ASIC has EEPROM(electricity erasable type programmable read only memory, English full name is " electrically erasable programmable read-only memory "), can demarcate sensor by the I/O interface end of electrical cnnector port 5.
Be arranged in housing 2 one sides along horizontal direction on the relative opposite side (downside shown in Figure 1) of housing connecting portion 4 on, housing 2 is provided with pressure port 6.Pressure port 6 is elongated hollow cylinder shape substantially, is communicated with pressure sensor 9 fluids of ASIC, so that sensor device utilizes pressure sensor 9 to measure vacuum pressure by pressure port 6.Compare with traditional sensor device pressure port that is designed to barb-shaped, pressure port 6 sizes of the present utility model are little, its design is suitable for being connected to automobile vacuum booster by sebific duct, makes the installation of sensors position more flexible, can be arranged in the limited nacelle of narrow space.
Now referring to Fig. 2, show the cut-open view according to sensor device 1 of the present utility model that obtains along the I-I line of Fig. 1.Be arranged in along the longitudinal direction housing 2 one ends on the relative other end (right-hand member shown in Figure 2) of housing connecting portion 4 on, housing 2 is provided with the electrical cnnector port 5 of the shape of the oval cylinder that is substantially hollow.In the present embodiment, electrical cnnector port 5 is the Client application port, comprise as power supply, with the I/O interface end of output signal end.As ground will be described in further detail hereinafter, electrical cnnector port 5 comprises crooked press fit pin 7.
The press fit pin 7 of electrical cnnector port 5 is used for described electronic module assembly being fixed to the chamber interior of described housing and setting up electrical connection between described electronic module assembly and electrical cnnector port.Press fit pin 7 in the present embodiment is three, but the quantity of press fit pin of the present utility model is not limited to this.Extend with the longitudinal direction almost parallel ground of housing in the oval cylinder of this hollow an end of press fit pin 7, and correspond respectively to electrical cnnector port 5 power supply, and output signal end.In addition, the bend that is " U " shape of press fit pin 7 is fixed in the housing 2, and stretches out from chamber 11.As shown in Fig. 3, in this embodiment, three press fit pins 7 are positioned in parallel within chamber 11 near on the ends of electrical cnnector port 5 along horizontal direction as further.Yet the utility model is not limited to this.The layout of press fit pin 7 in the chamber 11 of housing 2 can be looked actual needs and be changed, and for example, press fit pin 7 is arranged in each corner of chamber 11 with can becoming diagonal line.The degree of depth that vertically highly do not exceed chamber 11 of press fit pin 7 in chamber 11.
Press fit pin 7 has and is positioned at head 15 chamber 11, that comprise the elastic region, and the grooves that electronic module assembly 3 has and head 15 is corresponding, insert for described head.The size of groove is less than the full-size of the elastic region of head 15.When head 15 was inserted through described groove, elastic deformation occured in the elastic region of head 15, thereby had realized connecting in head 15 and the solderless press fit between the described groove of press fit pin 7.This solderless press fit connection has not only realized setting up between electronic module assembly 5 and the electrical cnnector port 5 and has been electrically connected, and also helps electronic module assembly 5 is fixed in the chamber 11 of housing 2.
In the present embodiment, press fit pin 7 is made by the aldary sill with tin/nickel coating, and described groove is electroplating ventilating hole.
According to the utility model, the press fit pin technology that adopts can be removed the needs that carry out again welding operation at printed circuit board (PCB) from, thereby eliminated the thermal stress of electronic module assembly and cleaning afterwards, avoided the welding operation error such as weldering bridge, space, welding slag and crack etc.In addition, adopt the press fit pin also to realize connecting highly reliably effect, the long service life in automotive industry in the application scenario.Adopt the sensor device of this technology can adopt the higher pin arrangement of density, and be easy to customization to satisfy packing and manufacturability target.
As shown in Figure 4, the utility model also preferably is provided with water-proof film 16, and this water-proof film preferably has the shape of rectangle, is arranged in the bottom of the housing 2 of sensor device 1.The contiguous pressure port 6 of water-proof film 15 arrange, and can introduce atmospheric pressure to the front of reaction diaphragm, can also prevent entering of outside contamination (such as dust etc.) and water.Water-proof film is preferably the polytetrafluoroethylene diaphragm with polyester layer, and the breeder tube size that has is 0.1 μ m.
Now, the calibration process according to sensor device 1 of the present utility model is described.
At first, will be added to greater than the voltage of 12V the power end in the electrical cnnector port, the ASIC pin that this connector port is connected is converted to numeral and writes inbound port.
Then, apply low pressure and two force value of high pressure for the cell pressure port, and under different temperatures, temperature compensation is carried out in transducer calibration.
The coefficient that calibrated and calculated is gone out is stored among the EEPROM, carries out in actual applications calculating and the correction of sensor output by these coefficients, makes sensor satisfy accuracy requirement in total pressure and temperature range.
With respect to directly circuit manually being adjusted or laser resistor trimming is demarcated, above-mentioned to the process of demarcating according to sensor device of the present utility model so that production efficiency is high, rejection rate is low, and can realize the repeatedly demarcation to sensor.Secondly, above-mentioned calibration process has directly utilized the temperature variant characteristic of sensitive element silicon diaphragm resistance to carry out temperature sensing and compensation, not be used in integrated temperature measurement function among the ASIC, thereby has reduced design complexity and the cost of ASIC.
Claims (9)
1. automobile-use vacuum pressure sensor, this vacuum pressure sensor device comprises the housing with chamber and the electronic module assembly that is positioned at described chamber interior, it is characterized in that, described electronic module assembly comprises the pressure sensor that is integrated on the printed circuit board (PCB), described housing further comprises the electrical cnnector port, and this electrical cnnector port has for the chamber interior that described electronic module assembly is fixed to described housing and set up at least one press fit pin of electrical connection between described electronic module assembly and electrical cnnector port.
2. vacuum pressure sensor according to claim 1, it is characterized in that, described press fit pin has and is positioned at head described chamber, that comprise the elastic region, and described electronic module assembly have corresponding with described head, be inserted through the groove of realizing that the solderless press fit connects for described head.
3. vacuum pressure sensor according to claim 2 is characterized in that, the size of described groove is less than the full-size of the described elastic region of described head.
4. the described vacuum pressure sensor of arbitrary claim in 3 according to claim 1 is characterized in that the quantity of described press fit pin is three.
5. vacuum pressure sensor according to claim 3 is characterized in that, described groove is electroplating ventilating hole.
6. the described vacuum pressure sensor of arbitrary claim in 3 according to claim 1 is characterized in that described electrical cnnector port is the Client application port of demarcating described sensor under different temperatures, comprise power supply, and output signal end.
7. vacuum pressure sensor according to claim 5 is characterized in that, the electrical cnnector port is connected with special IC in the described electronic module assembly through described press fit pin.
8. the described vacuum pressure sensor of arbitrary claim in 3 according to claim 1, it is characterized in that, described housing further comprises the pressure survey port, and this pressure survey port is elongated hollow cylindrical shape, is suitable for being connected with vacuum booster by flexible pipe.
9. vacuum pressure sensor according to claim 8 is characterized in that, described housing also comprises the water proof and dust proof diaphragm of the also contiguous described pressure survey port arrangements in bottom that is positioned at described housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220410081 CN202853838U (en) | 2012-08-17 | 2012-08-17 | Vacuum pressure transducer apparatus for vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220410081 CN202853838U (en) | 2012-08-17 | 2012-08-17 | Vacuum pressure transducer apparatus for vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202853838U true CN202853838U (en) | 2013-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220410081 Expired - Lifetime CN202853838U (en) | 2012-08-17 | 2012-08-17 | Vacuum pressure transducer apparatus for vehicles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202853838U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398819A (en) * | 2013-08-26 | 2013-11-20 | 昆山市兴利车辆科技配套有限公司 | Novel vehicle vacuum pressure sensor |
| CN105157910A (en) * | 2015-09-22 | 2015-12-16 | 苏州普京真空技术有限公司 | Vacuum pressure sensor |
| CN105509954A (en) * | 2015-11-26 | 2016-04-20 | 宁波新思创机电科技股份有限公司 | Vacuum pressure sensor |
-
2012
- 2012-08-17 CN CN 201220410081 patent/CN202853838U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398819A (en) * | 2013-08-26 | 2013-11-20 | 昆山市兴利车辆科技配套有限公司 | Novel vehicle vacuum pressure sensor |
| CN105157910A (en) * | 2015-09-22 | 2015-12-16 | 苏州普京真空技术有限公司 | Vacuum pressure sensor |
| CN105509954A (en) * | 2015-11-26 | 2016-04-20 | 宁波新思创机电科技股份有限公司 | Vacuum pressure sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130403 |