CN219284531U - Pressure sensor and vehicle - Google Patents
Pressure sensor and vehicle Download PDFInfo
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- CN219284531U CN219284531U CN202223155319.0U CN202223155319U CN219284531U CN 219284531 U CN219284531 U CN 219284531U CN 202223155319 U CN202223155319 U CN 202223155319U CN 219284531 U CN219284531 U CN 219284531U
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Abstract
The utility model provides a pressure sensor and a vehicle, the pressure sensor includes: the pressure sensing device comprises a pressure sensing element, an interface circuit and a signal processor for converting a pressure analog signal into a digital signal of a preset protocol type, wherein the output end of the pressure sensing element is electrically connected with the input end of the signal processor, and the output end of the signal processor is electrically connected with an electronic control unit of a target vehicle through the interface circuit. The utility model can improve the anti-interference performance of the pressure sensor.
Description
Technical Field
The utility model relates to the technical field of automobile electronics, in particular to a pressure sensor and a vehicle.
Background
Nowadays, with the rapid development of the automobile industry, the automobile electronic technology has greatly advanced in control precision, adaptability, intellectualization and the like, and the overall optimized operation of the automobile is realized. The pressure sensor is used as an information source of an automobile electronic control system, is a key component of the automobile electronic control system, and is one of the cores of modern automobile driving.
Most of output signals of the pressure sensor used at the present stage are analog, however, along with the continuous increase of the number of electronic components in the whole vehicle system, the electromagnetic environment of the whole vehicle is more complex, and the risk that the analog signals output by the pressure sensor are distorted by electromagnetic interference is obviously improved, so that the safe operation of the whole vehicle is influenced.
Disclosure of Invention
The utility model provides a pressure sensor and a vehicle, which are used for solving the problem of poor electromagnetic interference resistance of an output signal of the pressure sensor in the prior art.
In a first aspect, an embodiment of the present utility model provides a pressure sensor, including: the pressure sensing element, the interface circuit and the signal processor are used for converting the analog signal of the pressure quantity into a digital signal of a preset protocol type;
the output end of the pressure sensing element is electrically connected with the input end of the signal processor, and the output end of the signal processor is electrically connected with the electronic control unit of the target vehicle through the interface circuit.
Optionally, the preset protocol types include: the SENT bus protocol, the LIN bus protocol and the CAN bus protocol.
Optionally, the preset protocol type is a SENT bus protocol, and the signal processor is a signal processing chip integrated with the SENT protocol;
the signal processing chip integrated with the SENT protocol comprises a first processing module and a SENT protocol processing module;
the input end of the first processing module is electrically connected with the output end of the pressure sensing element, the output end of the first processing module is electrically connected with the input end of the SENT protocol processing module, and the output end of the SENT protocol processing module is electrically connected with the electronic control unit of the target vehicle through an interface circuit.
Optionally, the preset protocol type is LIN bus protocol, and the signal processor is a signal processing chip integrating LIN protocol;
the signal processing chip integrating the LIN protocol comprises a second processing module and a LIN protocol processing module;
the input end of the second processing module is electrically connected with the output end of the pressure sensing element, the output end of the second processing module is electrically connected with the input end of the LIN protocol processing module, and the output end of the LIN protocol processing module is electrically connected with the electronic control unit of the target vehicle through the interface circuit.
Optionally, the preset protocol type is a CAN bus protocol, and the signal processor is provided with a signal processing unit, a micro processing unit integrated with the CAN protocol and a CAN transceiver;
the output end of the pressure sensing element is electrically connected with the input end of the signal processing unit, and the output end of the signal processing unit is electrically connected with the input end of the micro-processing unit; the output end of the micro-processing unit is electrically connected with the input end of the CAN transceiver, and the output end of the CAN transceiver is electrically connected with the electronic control unit of the target vehicle through the interface circuit.
Optionally, the pressure sensing element is a resistive sensing element or a capacitive sensing element.
Optionally, the pressure measuring modes of the capacitive sensing element include absolute pressure type, surface pressure type and differential pressure type.
In a second aspect, an embodiment of the utility model provides a vehicle comprising a pressure sensor according to the first aspect.
The embodiment of the utility model provides a pressure sensor and a vehicle, wherein the pressure sensor comprises a pressure sensing element, a signal processor and an interface circuit, the output end of the pressure sensing element is electrically connected with the input end of the signal processor, and the output end of the signal processor is electrically connected with an electronic control unit of a target vehicle through the interface circuit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a pressure sensor according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a pressure sensor using the SENT bus protocol according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a pressure sensor using LIN bus protocol according to an embodiment of the present utility model;
fig. 4 is a schematic structural diagram of a pressure sensor using a CAN bus protocol according to an embodiment of the present utility model.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present utility model. It will be apparent, however, to one skilled in the art that the present utility model may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present utility model with unnecessary detail.
In order to illustrate the technical scheme of the utility model, the following description is made by specific examples.
Under the promotion of the trend of electric, intelligent and networking of automobiles, the position of automobile electronics plays a role in the automobile industry. As intelligent networking automobiles are listed as one of the important strategic directions of the country, the growing potential of the automotive electronics industry is expected to be further released. Most critical systems of automobiles rely on pressure sensors to measure and monitor critical parameters to obtain the running state of the automobile, so that the automobile is safer to run. Therefore, the performance and stability of the pressure sensor are very important.
The output signal of the traditional pressure sensor is an analog quantity, and along with the increase of electronic equipment on a vehicle and the increasing complexity of an external electromagnetic environment, the analog quantity signal is easy to interfere in the transmission process, so that the signal is abnormal, and the safe operation of a target vehicle is further influenced.
In order to solve the problems in the prior art, the embodiment of the utility model provides a pressure sensor and a vehicle. The pressure sensor provided by the embodiment of the present utility model will be described first.
Fig. 1 is a schematic structural diagram of a pressure sensor according to an embodiment of the present utility model, where the pressure sensor 10 includes a pressure sensing element 11, an interface circuit 13, and a signal processor 12 for converting a pressure analog signal into a digital signal of a preset protocol type, where an output end of the pressure sensing element 11 is electrically connected to an input end of the signal processor 12, and an output end of the signal processor 12 is electrically connected to an electronic control unit of a target vehicle through the interface circuit 13.
In some embodiments, the electrical connection may be a cable connection or a wireless connection.
In some embodiments, the interface circuit may be a logic circuit that is used for connection between computers, between a computer and a peripheral device, and between internal components of the computer, and is a bridge for information interaction between the CPU and the peripheral device, and may be parallel communication or serial communication.
In some embodiments, the pressure sensing element 11 is used to detect a pressure signal of the measured medium, and may be a resistive sensing element or a capacitive sensing element.
Specifically, the resistive pressure sensing element may convert the measured pressure signal into a change value of a resistance value, and then convert the change value of the resistance into an electrical signal by using a measurement circuit, so as to achieve the purpose of detecting the measured pressure signal. For example, resistive sensing elements include resistive strain elements, thermal resistors, humidity resistors, gas resistors, and the like. The capacitive sensing element can convert the pressure signal into a capacitance change value, and then utilize a measuring circuit to detect the pressure signal.
In the embodiment of the present utility model, the preset protocol type may be a send (Single Edge Nibble Transmission, single-sided half word transfer) bus protocol, a LIN (Local Interconnect Network ) bus protocol, or a CAN (Controller Area Network, controller area network) bus protocol.
Specifically, the send bus protocol is a unidirectional communication scheme that encodes sensor data into a series of pulse signals for data transmission from the sensor to an engine control unit (Engine Control Unit, ECU), and is mainly applied to point-to-point, sensor and electronic control units in automotive electronics. The sensor signal transmitted by the protocol has the characteristics of high signal frequency, high transmission speed, unidirectional continuous data transmission and the like.
Specifically, the LIN bus protocol is a low-cost serial communication network, is used for realizing control of a distributed electronic system in an automobile, is a supplement to other automobile multipath networks such as a Controller Area Network (CAN), and is suitable for applications without excessively high requirements on bandwidth, performance or fault tolerance functions of the network. The LIN bus is based on SCI (UART) data format, with a single master/multiple slave mode, a special case in UART.
Specifically, the CAN bus is a serial communication protocol bus for real-time application, which CAN use twisted pair wires to transmit signals, and is one of the most widely used fieldbuses in the world. The CAN bus protocol is used for communication between various components in an automobile to replace expensive and heavy wiring harnesses. The robustness of this protocol extends its use to other automation and industrial applications. The features of the CAN bus protocol include serial data communication of integrity, providing real-time support, transmission rates up to 1Mb/s, and 11-bit addressing and error detection capabilities.
In order to more clearly describe the technical solutions of the present utility model, various pressure sensor solutions are provided below.
As shown in fig. 2, a pressure sensor employing the send bus protocol is provided that is capable of converting a pressure quantity analog signal to a digital signal of the send bus protocol. Specifically, the signal processor 22 may be a signal processing chip integrated with the SENT protocol, and the signal processing chip integrated with the SENT protocol may include a first processing module 221 and a SENT protocol processing module 222.
The input end of the first processing module 221 is electrically connected with the output end of the sensing element 21, the output end of the first processing module 221 is electrically connected with the input end of the send protocol processing module 222, and the output end of the send protocol processing module 222 is electrically connected with the electronic control unit of the target vehicle through the interface circuit 23.
As shown in fig. 3, a pressure sensor employing a LIN bus protocol is provided that is capable of converting a pressure quantity analog signal into a digital signal of the LIN bus protocol. Specifically, the signal processor 32 may include a second processing module 321 and a LIN protocol processing module 322.
The input end of the second processing module 321 is electrically connected to the output end of the sensing element 31, the output end of the second processing module 321 is electrically connected to the input end of the LIN protocol processing module 322, and the output end of the LIN protocol processing module 322 is electrically connected to the electronic control unit of the target vehicle through the interface circuit 33.
Alternatively, the first processing module 221 and the second processing module 321 may be the same.
Optionally, the first processing module at least includes a first signal acquisition unit, a first filtering unit, a first isolation unit, and a first analog/digital conversion unit.
The input end of the first signal acquisition unit is electrically connected with the output end of the pressure sensing element, the output end of the first signal acquisition unit is electrically connected with the input end of the first filtering unit, the output end of the first filtering unit is electrically connected with the input end of the first isolation unit, the output end of the first isolation unit is electrically connected with the input end of the analog-to-digital conversion unit, and the output end of the first analog-to-digital conversion unit is electrically connected with the input end of the SENT protocol processing module.
Optionally, the second processing module at least includes a second signal acquisition unit, a second filtering unit, a second isolation unit, and a second analog/digital conversion unit.
The input end of the second signal acquisition unit is electrically connected with the output end of the pressure sensing element, the output end of the second signal acquisition unit is electrically connected with the input end of the second filtering unit, the output end of the second filtering unit is electrically connected with the input end of the second isolation unit, the output end of the second isolation unit is electrically connected with the input end of the second analog/digital conversion unit, and the output end of the second analog/digital conversion unit is electrically connected with the input end of the LIN protocol processing module.
As shown in fig. 4, a pressure sensor employing a CAN bus protocol is provided that is capable of converting a pressure amount analog signal into a digital signal of the CAN bus protocol. In particular, the signal processor 42 may include a signal processing unit 421, a micro processing unit 422 integrating the CAN protocol, and a CAN transceiver 423.
The output end of the pressure sensing element 41 is electrically connected with the input end of the signal processing unit 421, and the output end of the signal processing unit 421 is electrically connected with the input end of the micro-processing unit 422; an output end of the microprocessor 422 is electrically connected to an input end of the CAN transceiver 423, and an output end of the CAN transceiver 423 is electrically connected to an electronic control unit of the target vehicle through the interface circuit 13.
In some embodiments, the pressure measurement of the pressure sensing element may be absolute, gauge, or differential.
A second aspect of an embodiment of the present utility model provides a vehicle including the pressure sensor provided in any of the above embodiments of the present utility model, and having the advantageous effects provided by the pressure sensor provided in any of the above embodiments.
The embodiment of the utility model provides a pressure sensor and a vehicle, wherein the pressure sensor comprises a pressure sensing element, a signal processor and an interface circuit, the output end of the pressure sensing element is electrically connected with the input end of the signal processor, and the output end of the signal processor is electrically connected with an electronic control unit of a target vehicle through the interface circuit.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present utility model.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model, and are intended to be included in the scope of the present utility model.
Claims (6)
1. The pressure sensor is characterized by comprising a pressure sensing element, an interface circuit and a signal processor, wherein the signal processor is used for converting a pressure analog signal into a digital signal of a preset protocol type;
the output end of the pressure sensing element is electrically connected with the input end of the signal processor, and the output end of the signal processor is electrically connected with the electronic control unit of the target vehicle through the interface circuit;
wherein, the preset protocol type includes: SENT bus protocol, LIN bus protocol and CAN bus protocol;
the preset protocol type is SENT bus protocol, and the signal processor is a signal processing chip integrating SENT protocol;
the signal processing chip of the integrated SENT protocol comprises a first processing module and a SENT protocol processing module;
the input end of the first processing module is electrically connected with the output end of the pressure sensing element, the output end of the first processing module is electrically connected with the input end of the SENT protocol processing module, and the output end of the SENT protocol processing module is electrically connected with the electronic control unit through the interface circuit.
2. The pressure sensor of claim 1, wherein the predetermined protocol type is LIN bus protocol, and the signal processor is a signal processing chip integrated with LIN protocol;
the signal processing chip of the integrated LIN protocol comprises a second processing module and an LIN protocol processing module;
the input end of the second processing module is electrically connected with the output end of the pressure sensing element, the output end of the second processing module is electrically connected with the input end of the LIN protocol processing module, and the output end of the LIN protocol processing module is electrically connected with the electronic control unit through the interface circuit.
3. The pressure sensor of claim 1, wherein the predetermined protocol type is CAN bus protocol, and the signal processor comprises a signal processing unit, a micro-processing unit integrated with CAN protocol, and a CAN transceiver;
the output end of the pressure sensing element is electrically connected with the input end of the signal processing unit, and the output end of the signal processing unit is electrically connected with the input end of the micro-processing unit; the output end of the micro-processing unit is electrically connected with the input end of the CAN transceiver, and the output end of the CAN transceiver is electrically connected with the electronic control unit through the interface circuit.
4. The pressure sensor of claim 1, wherein the pressure sensing element is a resistive sensing element or a capacitive sensing element.
5. The pressure sensor of claim 4, wherein the pressure measurement of the capacitive sensing element includes absolute pressure, gauge pressure, and differential pressure.
6. A vehicle comprising a pressure sensor according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223155319.0U CN219284531U (en) | 2022-11-24 | 2022-11-24 | Pressure sensor and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223155319.0U CN219284531U (en) | 2022-11-24 | 2022-11-24 | Pressure sensor and vehicle |
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| Publication Number | Publication Date |
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| CN219284531U true CN219284531U (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223155319.0U Active CN219284531U (en) | 2022-11-24 | 2022-11-24 | Pressure sensor and vehicle |
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| CN (1) | CN219284531U (en) |
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- 2022-11-24 CN CN202223155319.0U patent/CN219284531U/en active Active
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