CN201740620U - Modulated electronic oil pressure sensor adopting hardware PWM - Google Patents
Modulated electronic oil pressure sensor adopting hardware PWM Download PDFInfo
- Publication number
- CN201740620U CN201740620U CN2010202595057U CN201020259505U CN201740620U CN 201740620 U CN201740620 U CN 201740620U CN 2010202595057 U CN2010202595057 U CN 2010202595057U CN 201020259505 U CN201020259505 U CN 201020259505U CN 201740620 U CN201740620 U CN 201740620U
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- China
- Prior art keywords
- oil pressure
- circuit board
- socket
- engine oil
- type engine
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model is a modulated electronic oil pressure sensor adopting hardware PWM, comprising a screwed joint base (5) connected to the bottom of a housing (2). In a cavity formed by the top of the screwed joint base (5) and the internal part of the housing (2), a filtering wire netting (8), a MEMS pressure-sensitive chip (4), a circuit board (7) and a socket plate (1) are disposed in order from bottom to top, wherein a through hole (6) is disposed at the middle of the screwed joint base (5), and is communicated with the internal part of the housing (2); the MEMS pressure-sensitive chip (4) is disposed on the circuit board (7); the socket plate (1) is connected to the circuit board (7) through a lead. The utility model has advantages of direct moving of an instrument; stable and reliable performance; high precision; long service life; simple circuit structure; low cost and compact structure.
Description
Technical field
The utility model relates to automotive electronics detection technique field, particularly a kind of electronic type engine oil pressure pickup that adopts hardware PWM modulation.
Background technology
At present, use has mechanical type engine oil pressure pickup and electronic type engine oil pressure pickup.
The mechanical type engine oil pressure pickup is the sensor that generally uses on automobile and diesel vehicle.Its product design principle is to utilize the metallic membrane compressive deformation, promotes cursor slide by a cover complicated mechanical devices and slides on slide wire resistance, and the slide wire resistance value is changed, and the electric current that changes the tensimeter coil is with detected pressures.Influence of various factors such as engine manufacture level of the defective in the design and China and road conditions, caused mechanical type engine oil pressure pickup mechanical fault many (as brush, slide wire resistance wearing and tearing and ablation, alarm actuating contact wearing and tearing, the anti-vibration performance is poor), defectives such as standardization level is low, and the life-span is limited.
And existing electronic type engine oil pressure pickup need to adopt the application-specific integrated circuit compensating circuit, caused cost height, circuit structure complexity, with defective such as conventional instrument coupling difficulty.
Summary of the invention
Technical problem to be solved in the utility model is: provide a kind of electronic type engine oil pressure pickup that adopts hardware PWM modulation, with the existing defective of the engine oil pressure pickup that overcomes present use.
The technical scheme that its technical matters that solves the utility model adopts is: be provided with the threaded connector pedestal that links to each other with outer casing bottom, in the top and the formed cavity of enclosure of threaded connector pedestal, be furnished with filtering metal net, MEMS presser sensor chip, circuit board and socket from bottom to top successively.Wherein: there is through hole at threaded connector pedestal middle part, and this through hole is connected with the inside of shell; The MEMS presser sensor chip is installed on the circuit board; Socket is by lead connecting circuit plate.
The utility model is compared with existing electronic type engine oil pressure pickup has following major advantage:
1. owing to adopted the MEMS presser sensor chip, make circuit structure simple, reduced the cost of product as sensor.
2. owing to having adopted the MEMS presser sensor chip, higher more than 10 times than foil gauge to the pressure change sensitivity, improved precision.
3. owing to used carrier communication that the engine oil pressure signal is handled, can directly drive conventional instrument, stepper motor instrument or virtual instrument, it is stable and reliable for performance, long service life.
4. compact conformation is reasonable.
Description of drawings
Fig. 1 is a front view of the present utility model.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the block scheme of signal processing circuit.
Among the figure: 1. socket; 2. shell; 3. pad; 4.MEMS presser sensor chip; 5. threaded connector pedestal; 6. through hole; 7. circuit board; 8. filtering metal net.
Embodiment
The electronic type engine oil pressure pickup of the employing hardware PWM modulation that the utility model provides, it by directly connecing instrument output after the carrier communication processing, has the function of automatic compensation by MEMS presser sensor chip harvester oil pressure signal.
Below in conjunction with accompanying drawing and example the utility model is described in further details.
The electronic type engine oil pressure pickup of employing hardware PWM that the utility model provides modulation, its structure be as depicted in figs. 1 and 2: be provided with threaded connector pedestal 5, its upper end links to each other with the bottom thread of hollow shell 2.In the top and shell 2 inner formed cavitys of threaded connector pedestal 5, be furnished with filtering metal net 8, MEMS presser sensor chip 4, circuit board 7 and socket 1 from bottom to top successively, wherein: there is through hole 6 at threaded connector pedestal 5 middle parts, and this through hole is connected with the inside of shell 2; Circuit board 7 is placed on the groove the inside of socket 1, adjusts socket 1 position with pad 3; MEMS presser sensor chip 4 is installed on the circuit board 7; Socket 1 is by lead connecting circuit plate 7.
Described circuit board 7 is except being equipped with the MEMS chip, also be provided with the signal processing circuit of routine shown in Figure 3, this circuit is formed and is comprised PWM modulator and the temperature sensing circuit that links to each other with the PWM modulator, amplifying circuit, triangular wave transtation mission circuit, warning circuit and instrument.
Described filtering metal net 8 can adopt the metal filter screen of one deck, two-layer or multilayer.
Assembling process of the present utility model is: filtering metal net 8 is placed on the threaded connector pedestal 5, up again circuit board 7 and the MEMS presser sensor chip 4 that is attached thereto are placed on the groove the inside of socket 1, adjust socket 1 position with pad 3, then shell 2 is threaded with threaded connector pedestal 5 upper ends, and fixes by bayonet lock.Socket 1 usefulness lead connecting circuit plate 7.
When the utility model uses, earlier threaded connector pedestal 5 is installed on the machine oil base by screw thread, machine oil is entered in the MEMS presser sensor chip 4 by through hole 6 then, after 8 filterings of filtering metal net, MEMS presser sensor chip 4 can the machines oil pressure, thereby is transferred on the circuit board 7.By various modules on the circuit board 7, after amplifying, carry out the carrier communication modulation, the signal after the modulation directly drives instrument output correspondent voltage value.
When the engine oil pressure signal of MEMS presser sensor chip 4 collections was lower than a thresholding, alarm sound was sent in the pressure alarm functional circuit work that sets on the circuit board 7, reminded the driver in time to replenish machine oil, guaranteed the motor car engine operate as normal.
The utility model functional reliability height, the moment can both be reflected the force value of machine oil truly, prevents that motor car engine from causing fault because of lacking machine oil.
Claims (4)
1. electronic type engine oil pressure pickup that adopts hardware PWM modulation, it is characterized in that being provided with the threaded connector pedestal (5) that links to each other with shell (2) bottom, in the top and the inner formed cavity of shell (2) of threaded connector pedestal (5), be furnished with filtering metal net (8), MEMS presser sensor chip (4), circuit board (7) and socket (1) from bottom to top successively, wherein: there is through hole (6) at threaded connector pedestal (5) middle part, and this through hole is connected with the inside of shell (2); MEMS presser sensor chip (4) is installed on the circuit board (7); Socket (1) is by lead connecting circuit plate (7).
2. electronic type engine oil pressure pickup according to claim 1 is characterized in that: circuit board (7) is placed on the groove the inside of socket (1), adjusts socket (1) position with pad (3).
3. electronic type engine oil pressure pickup according to claim 1 is characterized in that: filtering metal net (8) is the metal filter screen of one deck, two-layer or multilayer.
4. electronic type engine oil pressure pickup according to claim 1 is characterized in that: shell (2) fixes by bayonet lock with after threaded connector pedestal (5) links to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202595057U CN201740620U (en) | 2010-07-15 | 2010-07-15 | Modulated electronic oil pressure sensor adopting hardware PWM |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202595057U CN201740620U (en) | 2010-07-15 | 2010-07-15 | Modulated electronic oil pressure sensor adopting hardware PWM |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201740620U true CN201740620U (en) | 2011-02-09 |
Family
ID=43555896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202595057U Expired - Fee Related CN201740620U (en) | 2010-07-15 | 2010-07-15 | Modulated electronic oil pressure sensor adopting hardware PWM |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201740620U (en) |
-
2010
- 2010-07-15 CN CN2010202595057U patent/CN201740620U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Peng Qize Inventor after: Meng Liming Inventor after: Yang Bo Inventor after: Yang Shengbing Inventor before: Yang Shengbing Inventor before: Meng Liming Inventor before: Yang Bo Inventor before: Yang Shengbing |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: YANG SHENGBING MENG LIMING YANG BO YANG SHENGBING TO: PENG QIZE MENG LIMING YANG BO YANG SHENGBING |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20120715 |