CN212098436U - Combined instrument for monitoring vehicle tyre pressure - Google Patents

Abstract

The utility model relates to a combination meter is used in vehicle tire pressure monitoring has solved the not enough of prior art, and its technical scheme main points are: the automobile tire pressure monitoring system comprises a main control chip, an external tire pressure monitoring module, an auxiliary control processing unit, a liquid crystal screen and a voltage conversion module, wherein the auxiliary control processing unit is connected with a CAN (controller area network) bus of a vehicle, the auxiliary control processing unit is also connected with the external tire pressure monitoring module, the auxiliary control processing unit is connected with the main control chip through an SPI (serial peripheral interface) bus, the main control chip is connected with the liquid crystal screen, the voltage conversion module comprises a power supply monitoring circuit, a TPS54228 power supply circuit and an MP201DQ power supply module, the input end of the TPS54228 power supply circuit is electrically connected with a vehicle power supply, 5V direct current is output from the TPS54228 power supply circuit, the input end of the MP201DQ power supply module is connected with the output end of the TPS54228 power supply circuit, the output end of the MP201DQ power supply module is connected with a voltage detection port of the main control.

Description

Combined instrument for monitoring vehicle tyre pressure

Technical Field

The utility model relates to a vehicle instrument, concretely relates to vehicle combination meter for tire pressure monitoring.

Background

At present, a traditional combination meter in the market is generally a stepping motor pointer type or LED lamp display type combination meter, a part of liquid crystal display screen can be inserted into the combination meter, and a part of the liquid crystal display combination meter is also a full liquid crystal display combination meter. Usually, the single chip microcomputer is used as a main control chip to control the logic algorithm of the combination instrument. And carrying out data analysis according to analog signals input by different hard wires or messages received by the CAN module, and further carrying out information display such as vehicle speed, temperature, alarm indication and the like through a stepping motor or LED indication or a liquid crystal display screen.

Chinese patent publication No.: 207097464U, patent publication date: 2018, 3 and 13, discloses an instrument panel structure, which is characterized by comprising a text plate, a light guide strip and a first light source piece, wherein the light guide strip is arranged on the text plate, the first light source piece is arranged on the text plate and is positioned below the light guide strip, a groove is formed in the light guide strip, and the first light source piece is embedded in the groove. However, in the prior art, the power supply of the instrument panel main control MCU chip is easily interfered by other modules, and when the power failure and other problems occur, the driving judgment is seriously influenced by display errors, so that potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The utility model provides a power supply of prior art panel board master control MCU chip is disturbed by other modules easily, shows when the outage scheduling problem that the mistake can seriously influence the driving judgement, has the problem of potential safety hazard, provides a combination meter for vehicle tire pressure monitoring.

This practical technical scheme who adopts of solving its technical problem is: a combined instrument for monitoring the tyre pressure of a vehicle comprises a main control chip, an external tyre pressure monitoring module, an auxiliary control processing unit, a liquid crystal screen and a voltage conversion module, wherein the auxiliary control processing unit is connected with a CAN bus of the vehicle, the auxiliary control processing unit is also connected with the external tyre pressure monitoring module, the auxiliary control processing unit is connected with the main control chip through an SPI bus, the main control chip is connected with the liquid crystal screen, the voltage conversion module comprises a power supply monitoring circuit, a TPS54228 power supply circuit and an MP201DQ power supply module, the input end of the TPS54228 power supply circuit is electrically connected with a vehicle power supply, 5V direct current is output by the TPS54228 power supply circuit, the input end of the MP201DQ power supply module is connected with the output end of the TPS54228 power supply circuit, the output end of the MP201DQ power supply module is connected with a voltage detection port of the main control chip, the output end of the MP201DQ power supply module is electrically connected, the main control chip is electrically connected with an EEPROM for storing power-off instantaneous data. The power supply part adopts a plurality of TPS54228 and MP201DQ voltage conversion modules. The TPS54228 power chip is used for converting a 12V power supply into a 5V direct-current power supply to be used by the 5V power supply module. The MP201DQ power supply module converts 5V voltage into 3.3V power supply for the main control chip to use. The utility model discloses use when using for having the power supply of three routes independent module, MCU main control chip power supply all the way, power detection all the way, in case detect power supply and cut off, then main control chip takes power down protection immediately, utilizes the electrolytic capacitor storage electric quantity of the circuit anterior segment of MCU main control chip power supply, with all kinds of data storage in the EEPROM the inside in the millisecond rank, in case lose. Therefore, the power supply of the main control MCU chip is fully ensured not to be interfered by other modules. The problem of automatic panel board show that the mistake can seriously influence driving judgement, have the potential safety hazard is solved.

Preferably, the main control chip is an MCIMX6D6AVT10AD chip, and the auxiliary control processing unit is an FS32K144UAT0ULHT chip. MCIMX6D6AVT10AD was chosen as the master control processing unit for the cluster. The control processor is a vehicle-scale central processing chip. The processor architecture adopting ARM Cortex-A91.2GHZ has excellent expansion capability and meets different requirements and applications of low-end and high-end functions. The method also has strong graphic processing capability, and meets the requirements of full liquid crystal instrument high-definition display, 2D/3D graphic rendering and video access. The auxiliary control processing unit selects an FS32K144UAT0ULHT chip. After the FS32K144UAT0ULHT control chip receives the switch analog signal and the can bus signal, it interprets the corresponding can information. While communicating with IMX6 via SPI data transfer. And finally displaying the required data on the liquid crystal screen. It should be understood by those skilled in the art that peripheral circuits need to be configured in the operating process of both the mcmix 6D6AVT10AD chip and the FS32K144UAT0ULHT chip, and the peripheral circuits can be obtained by querying a product manual thereof, which is not described in detail herein.

Preferably, the liquid crystal screen is a TFT liquid crystal screen, and the liquid crystal screen is connected with the vehicle-mounted large screen in a mapping mode through an LVDS interface. The TFT LCD screen is selected as the LCD screen, the resolution is 1024 x 600, the working temperature is-30 ℃ -85 ℃, a dual-channel 8bit LVDS interface is provided, and the mapping screen projection function of a mobile phone and a multimedia large screen is met. The utility model discloses an in, combination meter receives the LVDS information that comes from the big screen of well accuse, transmits the CSI module of IMX6 after decoding through DS90UB914Q, finally presents at the display screen at the image.

Preferably, the external tire pressure monitoring module comprises an SP12 temperature pressure sensor, a TDA5210 receiving module and a TDK5100F transmitting module, the SP12 temperature pressure sensor is in communication connection with the TDA5210 receiving module through the TDK5100F transmitting module, and the TDA5210 receiving module is connected with the auxiliary control processing unit.

Preferably, the auxiliary control processing unit is further electrically connected with an X3P016B voice alarm processing chip.

Preferably, the power supply monitoring circuit comprises a voltage-dividing resistor circuit and an electrolytic capacitor, an input end of the voltage-dividing resistor circuit is connected with an output end of the MP201DQ power supply module, a ground end of the voltage-dividing resistor circuit is grounded, an output end of the voltage-dividing resistor circuit is grounded through the electrolytic capacitor, and an output end of the voltage-dividing resistor circuit is electrically connected with a power supply end of the main control chip. The power supply monitoring circuit mainly utilizes the teasel root capability of the electrolytic capacitor to supply power for the main control chip, and actually, a circuit connected with a voltage detection port of the main control chip is similar to the power supply monitoring circuit, and only the electrolytic capacitor is not needed.

The practical substantive effect is: the power supply part adopts a plurality of TPS54228 and MP201DQ voltage conversion modules. The TPS54228 power chip is used for converting a 12V power supply into a 5V direct-current power supply to be used by the 5V power supply module. The MP201DQ power supply module converts 5V voltage into 3.3V power supply for the main control chip to use. The system comprises three independent modules for supplying power, one MCU main control chip for supplying power and one power supply for detecting. Therefore, the power supply of the main control MCU chip is fully ensured not to be interfered by other modules. The problem of automatic panel board show that the mistake can seriously influence driving judgement, have the potential safety hazard is solved.

Drawings

Fig. 1 is an overall schematic view of the present invention;

FIG. 2 is a schematic circuit diagram of the TPS54228 power circuit of the present invention;

fig. 3 is a schematic circuit diagram of the MP201DQ power supply module of the present invention;

Detailed Description

The technical solution of the present invention will be further specifically described below by way of specific examples.

Example (b):

a combined instrument for monitoring the tyre pressure of a vehicle comprises a main control chip, an external tyre pressure monitoring module, an auxiliary control processing unit, a liquid crystal screen and a voltage conversion module, wherein the auxiliary control processing unit is connected with a CAN bus of the vehicle, the auxiliary control processing unit is also connected with the external tyre pressure monitoring module, the auxiliary control processing unit is connected with the main control chip through an SPI bus, the main control chip is connected with the liquid crystal screen, the voltage conversion module comprises a power supply monitoring circuit, a TPS54228 power supply circuit and an MP201DQ power supply module, the input end of the TPS54228 power supply circuit is electrically connected with a vehicle power supply, 5V direct current is output by the TPS54228 power supply circuit, the input end of the MP201DQ power supply module is connected with the output end of the TPS54228 power supply circuit, the output end of the MP201DQ power supply module is connected with a voltage detection port of the main control chip, the output end of the MP201DQ power supply module is also electrically, the main control chip is electrically connected with an EEPROM for storing power-off instantaneous data. The main control chip is an MCIMX6D6AVT10AD chip, and the auxiliary control processing unit is an FS32K144UAT0ULHT chip. The power supply part of the embodiment adopts a plurality of TPS54228 and MP201DQ voltage conversion modules. The TPS54228 power chip is used for converting a 12V power supply into a 5V direct-current power supply to be used by the 5V power supply module. The MP201DQ power supply module converts 5V voltage into 3.3V power supply for the main control chip to use. The power supply protection circuit is characterized in that three independent modules are used for supplying power, one MCU main control chip supplies power, the other power supply is used for detecting, once the power supply is detected to be cut off, the main control chip immediately adopts power down protection, the electrolytic capacitor at the front section of the circuit for supplying power by the MCU main control chip stores electric quantity, and various data are stored in the EEPROM within millisecond level to prevent loss. Therefore, the power supply of the main control MCU chip is fully ensured not to be interfered by other modules. The problem of automatic panel board show that the mistake can seriously influence driving judgement, have the potential safety hazard is solved. The liquid crystal screen is a TFT liquid crystal screen, and the liquid crystal screen is connected with the vehicle-mounted large screen in a mapping mode through an LVDS interface. The external tire pressure monitoring module comprises an SP12 temperature pressure sensor, a TDA5210 receiving module and a TDK5100F transmitting module, the SP12 temperature pressure sensor is in communication connection with the TDA5210 receiving module through the TDK5100F transmitting module, and the TDA5210 receiving module is connected with the auxiliary control processing unit. The power monitoring circuit comprises a divider resistance circuit and an electrolytic capacitor, wherein the input end of the divider resistance circuit is connected with the output end of the MP201DQ power supply module, the grounding end of the divider resistance circuit is grounded, the output end of the divider resistance circuit is grounded through the electrolytic capacitor, and the output end of the divider resistance circuit is electrically connected with the power supply end of the main control chip. The power supply monitoring circuit mainly utilizes the teasel root capability of the electrolytic capacitor to supply power for the main control chip, and actually, a circuit connected with a voltage detection port of the main control chip is similar to the power supply monitoring circuit, and only the electrolytic capacitor is not needed.

The embodiment selects MCIMX6D6AVT10AD as the main control processing unit of the combination meter. The control processor is a vehicle-scale central processing chip. The processor architecture adopting ARM Cortex-A91.2GHZ has excellent expansion capability and meets different requirements and applications of low-end and high-end functions. The method also has strong graphic processing capability, and meets the requirements of full liquid crystal instrument high-definition display, 2D/3D graphic rendering and video access. The auxiliary control processing unit selects an FS32K144UAT0ULHT chip. After the FS32K144UAT0ULHT control chip receives the switch analog signal and the can bus signal, it interprets the corresponding can information. While communicating with IMX6 via SPI data transfer. And finally displaying the required data on the liquid crystal screen. It should be understood by those skilled in the art that peripheral circuits need to be configured in the operating process of both the mcmix 6D6AVT10AD chip and the FS32K144UAT0ULHT chip, and the peripheral circuits can be obtained by querying a product manual thereof, which is not described in detail herein. The TFT LCD screen is selected as the LCD screen, the resolution is 1024 x 600, the working temperature is-30 ℃ -85 ℃, a dual-channel 8bit LVDS interface is provided, and the mapping screen projection function of a mobile phone and a multimedia large screen is met. The utility model discloses an in, combination meter receives the LVDS information that comes from the big screen of well accuse, transmits the CSI module of IMX6 after decoding through DS90UB914Q, finally presents at the display screen at the image. The external tire pressure monitoring hardware module is an SP12 temperature and pressure sensor. The transmitting end module is TDK 5100F. In view of this, the combo meter receive end module is selected as TDA 5210. The receiving module demodulates and decodes the information sent by the TPMS transmitting module, transmits the received data to the combination instrument MCU for data analysis, and finally displays the data through the TFT liquid crystal screen. The auxiliary control processing unit is also electrically connected with an X3P016B voice alarm processing chip.

The chips, elements and module units selected by the applicant are all the prior art, and the technical manuals thereof all have practical applications of the connection thereof, and those skilled in the art should understand the technical contents, so that the applicant does not give details about the specific line connection known in the prior art.

The above-described embodiment is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the invention as set forth in the claims.

Claims (6)

1. A combination instrument for monitoring vehicle tire pressure is characterized by comprising a main control chip, an external tire pressure monitoring module, an auxiliary control processing unit, a liquid crystal screen and a voltage conversion module, wherein the auxiliary control processing unit is connected with a CAN (controller area network) bus of a vehicle, the auxiliary control processing unit is also connected with the external tire pressure monitoring module, the auxiliary control processing unit is connected with the main control chip through an SPI (serial peripheral interface) bus, the main control chip is connected with the liquid crystal screen, the voltage conversion module comprises a power supply monitoring circuit, a TPS54228 power supply circuit and an MP201DQ power supply module, the input end of the TPS54228 power supply circuit is electrically connected with a vehicle power supply, 5V direct current is output by the TPS54228 power supply circuit, the input end of the MP201DQ power supply module is connected with the output end of the TPS54228 power supply circuit, the output end of the MP201DQ power supply module is connected with a voltage detection port of the main control chip, the output end of the MP201DQ, the main control chip is electrically connected with an EEPROM for storing power-off instantaneous data.

2. The vehicle combination meter for tire pressure monitoring of claim 1, wherein the main control chip is a mcmix 6D6AVT10AD chip, and the auxiliary control processing unit is a FS32K144UAT0ULHT chip.

3. The combination meter for monitoring the tire pressure of the vehicle according to claim 2, wherein the liquid crystal screen is a TFT liquid crystal screen, and the liquid crystal screen is connected to the large vehicular screen through an LVDS interface in a mapping manner.

4. The combination meter for monitoring tire pressure of vehicle according to claim 2, wherein the external tire pressure monitoring module comprises an SP12 temperature pressure sensor, a TDA5210 receiving module and a TDK5100F transmitting module, the SP12 temperature pressure sensor is connected with the TDA5210 receiving module through the TDK5100F transmitting module, and the TDA5210 receiving module is connected with the auxiliary control processing unit.

5. The combination meter for monitoring the tire pressure of the vehicle as claimed in claim 2, wherein the auxiliary control processing unit is further electrically connected with an X3P016B voice alarm processing chip.

6. The combination meter for monitoring the tire pressure of the vehicle as claimed in claim 1, wherein the power monitoring circuit comprises a voltage-dividing resistor circuit and an electrolytic capacitor, the input end of the voltage-dividing resistor circuit is connected with the output end of the MP201DQ power supply module, the ground end of the voltage-dividing resistor circuit is grounded, the output end of the voltage-dividing resistor circuit is grounded through the electrolytic capacitor, and the output end of the voltage-dividing resistor circuit is electrically connected with the power supply end of the main control chip.

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