CN220542143U - SENT output type temperature pressure sensor - Google Patents
SENT output type temperature pressure sensor Download PDFInfo
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- CN220542143U CN220542143U CN202322266150.4U CN202322266150U CN220542143U CN 220542143 U CN220542143 U CN 220542143U CN 202322266150 U CN202322266150 U CN 202322266150U CN 220542143 U CN220542143 U CN 220542143U
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- pressure sensor
- contact pin
- shell
- temperature
- thermistor
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- 238000001746 injection moulding Methods 0.000 claims abstract description 11
- 238000003466 welding Methods 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims abstract description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000741 silica gel Substances 0.000 claims abstract description 6
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 6
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000009434 installation Methods 0.000 claims abstract 2
- 238000007789 sealing Methods 0.000 claims description 5
- 239000000523 sample Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 14
- 238000001514 detection method Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000008646 thermal stress Effects 0.000 abstract description 4
- 238000005538 encapsulation Methods 0.000 abstract description 3
- 238000005476 soldering Methods 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract 2
- 229920003023 plastic Polymers 0.000 abstract 2
- 239000004033 plastic Substances 0.000 abstract 2
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000499 gel Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model provides a SENT output type temperature pressure sensor, wherein a shell and a contact pin are finished through injection molding, and a steel ball is arranged on a top cover to balance internal and external pressure, so that the output stability of a full temperature area is ensured; the contact pin is used for fixing the NTC thermistor and the capacitor through welding, so that the production efficiency is improved, a pressure chip is arranged in the pressure sensor module, the NTC thermistor is fixed with the contact pin through welding by adopting silica gel encapsulation and quick installation through a buckle, and a traditional lead wire passing through a PCB re-soldering process is replaced; the pressure sensor module provides a pressure detection signal, the NTC thermistor provides a temperature detection signal, and the traditional PCB bearing SMT process is replaced, so that poor product output precision caused by PCB thermal stress deformation is reduced; the shell bottom is equipped with mould contact pin locating hole and inside pre-buried location thimble with contact pin in-process of moulding plastics, prevents that the contact pin from moulding plastics in-process and pinpoints poorly.
Description
Technical Field
The utility model belongs to the technical field of sensors, and particularly relates to a SENT output type temperature and pressure sensor.
Background
Automotive temperature and pressure sensors (TMAP) are an important engine control system sensor for measuring engine intake pressure and temperature. TMAP is known collectively as "Throttle Manifold Absolute Pressure," a throttle inlet manifold absolute pressure sensor. The intake manifold temperature/absolute pressure sensor (TMAP) adopts a mode of integrating a temperature sensor (NTC) and an absolute pressure sensor (MAP), saves space and cost, and has the function of simultaneously detecting the change of the temperature and the absolute pressure of gas in a pipe and providing a reference signal for calculating the fuel duration to an ECU (engine electronic control unit). It may signal information about the engine air intake status to an Engine Control Module (ECM) so that the ECM may adjust engine fuel delivery and timing based on the information. TMAP sensors are generally composed of two parts: an intake air pressure sensor and an intake air temperature sensor. An intake pressure sensor measures absolute pressure in an engine intake manifold,
the conventional temperature and pressure sensor has the following disadvantages: the intake pressure sensor is an important signal feedback of the combustion control system, and can generate errors due to power supply voltage VDD fluctuation, which is difficult to completely eliminate in an automobile electronic system; the CAN or LIN interface of the traditional temperature and pressure sensor has higher cost, needs a special transceiver and has low transmission speed; the traditional analog voltage output sensor does not have more fault diagnosis and data transmission capabilities; the traditional temperature and pressure sensor has low automatic production efficiency, poor corrosion resistance, and low precision performance and reliability in a full temperature area and a full pressure range. Therefore, the utility model provides a SENT output type temperature and pressure sensor to solve the problems.
Disclosure of Invention
The utility model provides a SENT output type temperature and pressure sensor, and aims to solve the problems set forth in the background technology.
The utility model is realized in such a way that the SENT output type temperature and pressure sensor comprises a shell;
the top of the shell is sealed through a top cover, the shell comprises an electric connector end and a thermosensitive end, the electric connector end is used for being externally connected with an electric connector terminal, and the thermosensitive end is used for accommodating a thermistor lead;
the pressure sensor module is fixedly arranged in the shell through a buckle and is electrically connected with the contact pin, the NTC thermistor comprises two thermistor leads, one ends of the two thermistor leads are fixed on the contact pin, and the other ends of the two thermistor leads extend to the thermosensitive end;
the top cover is provided with steel balls which are used for balancing the internal pressure and the external pressure of the temperature pressure sensor so as to ensure the output stability of the temperature pressure sensor in a full temperature area.
Preferably, the integral output signal of the electric connector end is output by adopting a send protocol.
Preferably, an O-ring is arranged on the outer side of the thermosensitive end, and the O-ring is used for sealing the thermosensitive end mounting interface.
Preferably, a signal pressure chip is integrated in the pressure sensor module, and silica gel encapsulation is adopted for measuring absolute pressure in an intake manifold of the engine.
Preferably, the tail end of the thermistor lead is provided with a temperature sensing probe for measuring the air temperature in an engine intake manifold.
Preferably, the pins fix the NTC thermistor and the capacitor by welding.
Preferably, a mold pin positioning hole is formed in the bottom of the shell, and a positioning thimble is embedded in the mold pin positioning hole and is used for avoiding poor positioning in the injection molding process of the pin.
Compared with the prior art, the utility model has the beneficial effects that:
1. the output of the air inlet pressure sensor adopts the proportion output form of 0-5V analog voltage, so that when the ADC in the ECU and the pressure sensor use the same VDD as the reference voltage, the error generated by the fluctuation of the power supply voltage VDD can be eliminated;
2. the electrical connector end adopts the SENT output type temperature pressure sensor, the whole output signal adopts the SENT protocol to output, the traditional analog output type is replaced, the NTC thermistor, the pressure chip and the capacitor are quickly welded in the sensor through the pin design, the product quality is ensured, the efficiency and the automatic production are greatly improved, the MEMS sensitive film of the pressure sensor module is coated with the silicone gel protective medium, the back compression type is adopted, the corrosion resistance of the sensor is improved, and meanwhile, the good precision performance and the long-term reliability in the full temperature area and the full pressure range are ensured;
3. the NTC thermistor is fixed on the contact pin through a resistance welding process, replaces the traditional process that the lead passes through the PCB and is soldered again, the pressure sensor module provides pressure detection signal output, the NTC thermistor provides temperature detection signal, the traditional PCB bearing SMT process is replaced by the integral structural design, and poor product output precision caused by PCB thermal stress deformation is reduced;
4. in the injection molding process of the shell and the contact pin, the bottom of the shell is provided with the positioning hole of the mold contact pin, and the positioning thimble is embedded in the positioning hole of the mold contact pin, so that the phenomenon of different lengths caused by poor positioning in the injection molding process of the contact pin is prevented.
Drawings
FIG. 1 is a perspective view of the overall structure of the present utility model;
FIG. 2 is a perspective exploded view of the overall structure of the present utility model;
FIG. 3 is a perspective view of an NTC thermistor according to the present utility model;
FIG. 4 is a perspective view of a pin according to the present utility model;
FIG. 5 is a bottom view of the overall structure of the present utility model;
fig. 6 is a front cross-sectional view of the overall structure of the present utility model.
In the figure:
1. a housing; 11. an electrical connector end; 12. a thermosensitive end;
2. a top cover; 3. an O-ring; 4. a pressure sensor module;
5. an NTC thermistor; 51. a thermistor lead;
6. a contact pin; 7. steel balls; 8. and a mold pin positioning hole.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown.
The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model.
All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1 to 6, the present utility model provides a technical solution: a SENT output type temperature and pressure sensor comprises a shell 1; the top of the shell 1 is sealed by a top cover 2, the shell 1 comprises an electric connector end 11 and a thermosensitive end 12, the electric connector end 11 is used for externally connecting with an electric connector terminal, and the thermosensitive end 12 is used for accommodating a thermistor lead 51; the pressure sensor module 4, the NTC thermistor 5 and the contact pin 6 are arranged in the shell 1, the shell 1 and the contact pin 6 are integrally injection molded, the pressure sensor module 4 is fixedly arranged in the shell 1 through a buckle and is electrically connected with the contact pin 6, the NTC thermistor 5 comprises two thermistor leads 51, one ends of the two thermistor leads 51 are fixed on the contact pin 6, and the other ends extend to the thermosensitive end 12; the steel ball 7 is arranged on the top cover 2, and the steel ball 7 is used for balancing the internal pressure and the external pressure of the temperature and pressure sensor so as to ensure the output stability of the temperature and pressure sensor in the whole temperature area.
In the present embodiment, the intake pressure sensor output takes the form of a proportional output of 0 to 5V analog voltage, so that when the ADC in the ECU and the pressure sensor use the same VDD as the reference voltage, an error due to fluctuation of the power supply voltage VDD can be eliminated; the electrical connector end 11 adopts a SENT output type temperature pressure sensor, the whole output signal adopts a SENT protocol to output, the traditional analog output type is replaced, the inside of the sensor is designed through a contact pin 6, the NTC thermistor 5, a pressure chip and a capacitor are quickly welded, the product quality is ensured, meanwhile, the efficiency and the automatic production are greatly improved, a silicone gel protective medium is coated on a MEMS sensitive film of the pressure sensor module 4, and the back compression type is adopted, so that the corrosion resistance of the sensor is improved, and meanwhile, the good precision performance and the long-term reliability in a full temperature area and a full pressure range are ensured; the NTC thermistor 5 is fixed on the contact pin 6 through a resistance welding process, replaces the traditional lead wire to pass through a PCB (printed Circuit Board) soldering process, the pressure sensor module provides pressure detection signal output, the NTC thermistor 5 provides temperature detection signals, the traditional PCB bearing SMT process is replaced by the integral structural design, and poor product output precision caused by PCB thermal stress deformation is reduced.
Further, the integral output signal of the electrical connector terminal 11 is output by adopting the send protocol.
In this embodiment, the electrical connector 11 adopts a SENT output type temperature and pressure sensor, and the whole output signal adopts SENT protocol output instead of the traditional analog output type.
Further, referring to fig. 1 and 2, an O-ring 3 is disposed on the outer side of the thermo-sensitive end 12, and the O-ring 3 is used for sealing the mounting interface of the thermo-sensitive end 12.
In the present embodiment, the thermistor end 12 accommodates two thermistor leads 51 of the NTC thermistor 5 inside for an intake air temperature sensor to measure the air temperature in the engine intake manifold and convert it into an electrical signal output; the O-ring 3 is used for sealing the mounting interface of the thermo-sensitive end 12.
Furthermore, a signal pressure chip is integrated in the pressure sensor module 4, and silica gel encapsulation is adopted for measuring absolute pressure in an intake manifold of the engine.
In the embodiment, the pressure chip is used for measuring absolute pressure in an engine intake manifold, the MEMS sensitive film of the pressure sensor module 4 is coated with a silica gel protective medium, and the back compression mode is adopted, so that the corrosion resistance of the sensor is improved.
Further, the end of the thermistor lead 51 is provided with a temperature sensing probe for measuring the air temperature in the engine intake manifold.
In this embodiment, the temperature sensing probe is used to measure the air temperature in the engine intake manifold, facilitating the combined use of the ECM to control the fuel supply and ignition timing of the engine.
Further, the pins 6 fix the NTC thermistor 5 and the capacitor by welding.
In the present embodiment, the pins 6 fix the NTC thermistor 5 and the capacitor directly by a welding process, thereby improving the production efficiency.
Further, referring to fig. 6, a mold pin positioning hole 8 is provided at the bottom of the housing 1, and a positioning thimble is embedded in the mold pin positioning hole 8 to avoid poor positioning of the pin 6 during injection molding.
In this embodiment, in the injection molding process of the housing 1 and the contact pin 6, the bottom of the housing 1 is provided with a mold contact pin positioning hole 8, and a positioning thimble is embedded in the mold contact pin positioning hole 8, so as to prevent the phenomenon of uneven length caused by poor positioning in the injection molding process of the contact pin 6.
The working principle and the using flow of the utility model are as follows: the product structure mainly comprises a shell 1, a top cover 2, a pressure sensor module 4, an NTC thermistor 5, a contact pin 6 and steel balls 7, wherein the shell 1 and the contact pin 6 are finished through an injection molding process, the top cover 2 is provided with the steel balls 7, the internal and external pressure is mainly balanced, the output stability of a full temperature area of the product is ensured, and the product is used as a test interface for detecting the air tightness. The contact pin 6 is used for fixing the NTC thermistor 4 and the capacitor directly through a welding process, so that the production efficiency is improved, a signal pressure chip is integrated inside the pressure sensor module 4, a silica gel encapsulating is adopted, the pressure sensor module is directly and quickly installed in a buckling mode and is contacted with the contact pin 6, the NTC thermistor 5 is fixed to the contact pin 6 through a resistance welding process, and a traditional lead wire penetrating through a PCB soldering process is replaced. The pressure sensor module 4 provides pressure detection signal output, the NTC thermistor 5 provides temperature detection signals, the whole structural design replaces the traditional PCB bearing SMT technology, and poor product output precision caused by PCB thermal stress deformation is reduced. In addition, in the injection molding process of the shell 1 and the contact pin 6, a mold contact pin positioning hole 8 is formed in the bottom of the shell 1, and a positioning thimble is embedded in the mold contact pin positioning hole 8, so that the phenomenon of poor positioning and different lengths of the contact pin 6 in the injection molding process is prevented.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (7)
1. A SENT output form temperature pressure sensor, its characterized in that: comprises a housing (1);
the top of the shell (1) is sealed through a top cover (2), the shell (1) comprises an electrical connector end (11) and a thermosensitive end (12), the electrical connector end (11) is used for externally connecting an electrical connector terminal, and the thermosensitive end (12) is used for accommodating a thermistor lead wire (51);
the novel temperature sensor is characterized in that a pressure sensor module (4), an NTC thermistor (5) and a contact pin (6) are arranged in the shell (1), the shell (1) and the contact pin (6) are integrally injection molded, the pressure sensor module (4) is fixedly installed in the shell (1) through a buckle and is electrically connected with the contact pin (6), the NTC thermistor (5) comprises two thermistor leads (51), one ends of the two thermistor leads (51) are fixed on the contact pin (6), and the other ends extend to the thermosensitive end (12);
the top cover (2) is provided with steel balls (7), and the steel balls (7) are used for balancing the internal pressure and the external pressure of the temperature pressure sensor so as to ensure the output stability of the temperature pressure sensor in a full temperature zone.
2. A send output form temperature pressure sensor as claimed in claim 1, wherein: the integral output signal of the electric connector end (11) is output by adopting a send protocol.
3. A send output form temperature pressure sensor as claimed in claim 1, wherein: an O-shaped ring (3) is arranged on the outer side of the thermosensitive end (12), and the O-shaped ring (3) is used for sealing an installation interface of the thermosensitive end (12).
4. A send output form temperature pressure sensor as claimed in claim 1, wherein: and a signal pressure chip is integrated in the pressure sensor module (4), and silica gel filling and sealing is adopted for measuring absolute pressure in an intake manifold of the engine.
5. A send output form temperature pressure sensor as claimed in claim 1, wherein: the tail end of the thermistor lead (51) is provided with a temperature sensing probe which is used for measuring the air temperature in an engine intake manifold.
6. A send output form temperature pressure sensor as claimed in claim 1, wherein: the pins (6) fix the NTC thermistor (5) and the capacitor by welding.
7. A send output form temperature pressure sensor as claimed in claim 1, wherein: the bottom of the shell (1) is provided with a mold contact pin positioning hole (8), and a positioning thimble is embedded in the mold contact pin positioning hole (8) and used for avoiding poor positioning in the injection molding process of the contact pin (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322266150.4U CN220542143U (en) | 2023-08-22 | 2023-08-22 | SENT output type temperature pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322266150.4U CN220542143U (en) | 2023-08-22 | 2023-08-22 | SENT output type temperature pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220542143U true CN220542143U (en) | 2024-02-27 |
Family
ID=89975933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322266150.4U Active CN220542143U (en) | 2023-08-22 | 2023-08-22 | SENT output type temperature pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220542143U (en) |
-
2023
- 2023-08-22 CN CN202322266150.4U patent/CN220542143U/en active Active
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