CN108873780A - A kind of preceding dress TPMS device for supporting automatic positioning function - Google Patents
A kind of preceding dress TPMS device for supporting automatic positioning function Download PDFInfo
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- CN108873780A CN108873780A CN201810726115.7A CN201810726115A CN108873780A CN 108873780 A CN108873780 A CN 108873780A CN 201810726115 A CN201810726115 A CN 201810726115A CN 108873780 A CN108873780 A CN 108873780A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
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- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Automation & Control Theory (AREA)
- Computer Networks & Wireless Communication (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention discloses a kind of preceding dress TPMS devices for supporting automatic positioning function, the TPMS monitoring modular is used to detect the air pressure of inside tires, the information is simultaneously sent to TPMS controller by temperature and two-axis acceleration information by wireless communication, the TPMS controller includes wireless receiver, single-chip microcontroller, CAN interface and power module, the single-chip microcontroller receives the detection information of TPMS monitoring modular by wireless receiver, and to atmospheric pressure value, temperature value carries out abnormality processing, by processing result and atmospheric pressure value, vehicle navigator is sent to by CAN interface after temperature value and the packing of double-shaft acceleration sensor value, the power module is respectively to wireless receiver, single-chip microcontroller, CAN interface is powered.Occur air pressure it is excessively high, air pressure is too low, temperature excessively high abnormal conditions when and alarm, remind car owner debug in time guarantee traffic safety；When not receiving GPS signal or GPS signal is weak, vehicle navigator is automatically positioned and is navigated according to double-shaft acceleration sensor information.
Description
Technical field
The present invention relates to a kind of automotive electronics active safety control technologies more particularly to a kind of support to be automatically positioned function
The preceding dress TPMS device of energy.
Background technique
Direct-type TPMS (Tire Pressure Monitoring System, TPMS) full name is " radio tire pressure monitoring system
System ", generally includes tyre pressure sensor and tire pressure receiver two parts.Tyre pressure sensor is responsible for monitoring tire internal air pressure, temperature
Real-time status, and tire pressure receiver is sent in the form of wireless signal.Tire pressure receiver is responsible for receiving in display present tire
The pressure value and temperature value in portion.Different according to the allocating method of TPMS, TPMS is divided into preceding dress and rear dress.Preceding dress TPMS is vehicle
With (being commonly called as " standard configuration ") got ready before automobile factory, credit rating meets entire vehicle design requirement for producer, and then filling TPMS is vehicle
Oneself main purchase installation, credit rating is lower than complete vehicle quality requirement.
Vehicle navigator is used to provide cartographic information to car owner, facilitates car owner to search place and identification direction, it has also become house
With the vehicle electronic device of car indispensability.But when automobile enters tunnel, mountainous region, vehicle navigator can be because receive not
It fails to GPS signal.Traveling causes the GPS signal that can be received to die down as high-rise blocks in city,
The position error of vehicle navigator also becomes larger therewith, cannot provide accurate location information to car owner.If can know that the double of vehicle
Axis acceleration information, then can according to the kinematic parameters such as the travel speed of the coordinate of known starting point and vehicle, square driving direction come
Calculate the variation of its position, also referred to as " dead reckoning ".
Summary of the invention
Technical problem to be solved by the present invention lies in：How simultaneously by tire pressure monitoring and navigation information it is accurate with it is continuous
It is combined together, provides a kind of preceding dress TPMS device for supporting automatic positioning function.
The present invention be by the following technical programs solution above-mentioned technical problem, the present invention include TPMS monitoring modular and
TPMS controller；The TPMS monitoring modular is used to detect air pressure, temperature and the two-axis acceleration information of inside tires and should
Information is sent to TPMS controller by wireless communication, and the TPMS controller includes wireless receiver, single-chip microcontroller, CAN interface
And power module, the single-chip microcontroller receive the detection information of TPMS monitoring modular by wireless receiver, and to atmospheric pressure value, temperature
Value carries out abnormality processing, is connect after processing result and atmospheric pressure value, temperature value and double-shaft acceleration sensor value are packaged by CAN
Mouth is sent to vehicle navigator, and the power module is respectively powered wireless receiver, single-chip microcontroller, CAN interface.
The TPMS monitoring modular is powered using 3V battery, and the TPMS monitoring modular has tyre pressure sensor, particular type
Number be FXTH8705116T1 chip.
The tyre pressure sensor includes chip D1, battery DC1, filter capacitor C1, crystal oscillator G1, load capacitance C3, load electricity
Hold C4, debugging interface XS1, resistance R1, capacitor C2, low-frequency antenna L1, matching capacitance C5, inductance L3, inductance L2, capacitor C6；Electricity
Anode is connect with the pin 7 of chip D1 and pin 8 after pond DC1 is in parallel with filter capacitor C1, the pin of battery cathode and chip D1
6, pin 9 and pin 10 connect, and crystal oscillator G1 is 26MHz, and the both ends crystal oscillator G1 are connect with the pin 13 of chip D1 and pin 14 respectively,
And be grounded after being connect respectively with load capacitance C3 and C4,1 foot of debugging interface XS1 and the pin 15 of D1 connect, debugging interface XS1
2 feet connect with the pin 5 of chip D1,3 feet of debugging interface XS1 are connect with VDD, and 4 feet of debugging interface XS1 are connected to ground,
It is connected respectively with the pin 17 of chip D1 and pin 16 after resistance R1, capacitor C2, low-frequency antenna L1 three are in parallel, the one end inductance L2
VDD is connected, the other end is connect with the pin 11 of chip D1, and the one end inductance L3 is connected on high frequency antenna, and the other end is connected to core
On the pin 11 of piece D1, one end of matching capacitance C5 is connected to high frequency antenna, other end connection ground connection, the one end capacitor C6 and chip
The pin 12 of D1 connects, other end ground connection.
The single-chip microcontroller is STM8AF5288TC chip, including chip D4, filter capacitor C12, filter capacitor C11, capacitor
C17, resistance R7, capacitor C15, software debugging interface XS4；The operating voltage VCC of chip D4 is+5V, and the pin 8 of chip D4 draws
Foot 32, pin 7, pin 13 are all connected to VCC, and one end connects VCC, other end ground connection, chip after filter capacitor C12, C11 are in parallel
Pin 4, pin 31, pin 5, the pin 14 of D4 is all connected to ground, and the one end capacitor C17 is connect with the pin 6 of chip D4, the other end
Ground connection, resistance R7 and capacitor C15 form reset circuit, provide nRESET signal to the pin 1 of chip D4, software debugging interface
1 foot of XS4 is connect with the pin 42 of chip D4, and 2 feet of software debugging interface XS4 are connect with the pin 1 of chip D4, software debugging
3 feet of interface XS4 are connect with VCC, and 4 feet of software debugging interface XS4 are connected to ground.
The wireless receiver be MAX1471 chip, including chip D3, resistance R6, capacitor C10, capacitor C13, crystal oscillator G2,
Capacitor C16, capacitor C18, wave capacitor C22, filter capacitor C32, receiving antenna XS3, matching capacitance C21, inductance L5, inductance L6,
Inductance L7, capacitor C27, capacitor C23, capacitor C25, capacitor C28, intermediate-frequency filter D7, capacitor C29, resistance R8, capacitor C30, electricity
Hold C26, capacitor C24；The pin 29 of chip D3 is energization pins VCC, and voltage value is+5V, the one end resistance R6 and chip D3 pin 1
Connection, the other end are connect with capacitor C10 and pin 2；Mono- termination pins 3 of capacitor C13, other end ground connection, the termination of capacitor C14 mono- are drawn
Foot 4, the other end are connected with pin 2；Crystal oscillator G2 is connected with pin 5 and pin 6 respectively after connecting with capacitor C16, capacitor C18；Core
The pin 7 of piece D3 exports 3V analog voltage, mono- termination pins 7 of filter capacitor C22, other end ground connection, while the 3V that pin 7 exports
Voltage is connected with pin 24, mono- termination pins 24 of filter capacitor C32, other end ground connection；Receiving antenna XS3 and matching capacitance C21,
It is connected after inductance L5 series connection with pin 8, mono- termination pins 9 of inductance L6, other end ground connection；Inductance L7 is in parallel with capacitor C27 latter
End is connect with capacitor C23 and pin 10, and the other end is connected with capacitor C25 and capacitor C28；Intermediate-frequency filter D7, pin 13 with
1 foot of intermediate-frequency filter D7 is connected, the 2 feet ground connection of intermediate-frequency filter D7, the 3 foot intermediate-frequency filters output of intermediate-frequency filter D7 with
Pin 16 connects, mono- termination pins 15 of capacitor C29, other end ground connection；Resistance R8 and capacitor C30 composition low-pass filter and conduct
The thresholding of data conversion, resistance R8 are serially connected between pin 19 and pin 20, mono- termination pins 19 of capacitor C30, other end ground connection；
Mono- termination pins 21 of capacitor C26, other end ground connection, mono- termination pins 22 of capacitor C24, another termination pins 20；The net of chip D3
Network label nCS, SCLK, DATAOUT, DIO are are connected corresponding with nCS, SCLK, DATAOUT, DIO signal of chip D4.
The CAN interface be SN65HVDA541-Q1 chip, including chip D5, filter capacitor C19, filter capacitor C20, altogether
Mould inductance L4, connector XS2, TVS protect chip D6；The network label MCU- of chip D5>CAN,CAN->MCU, CAN-ON with
MCU- in STM8AF5288TC chip>CAN,CAN->MCU, CAN-ON signal are corresponding to be connected, when CAN-ON is high level,
SN65HVDA541-Q1 enters the suspend mode of low-power consumption, when CAN-ON is that low level is then normally received and dispatched；The pin of chip D5
3VCC voltage value is+5V, and mono- termination pins 3 of filter capacitor C19, other end ground connection, pin 5 is connected with pin 3, filter capacitor
Mono- termination pins 5 of C20, other end ground connection；The pin 7 of chip D5 is connect with 1 foot of common mode inductance L4, the pin 6 of chip D5 with
4 feet of common mode inductance L4 connect, and 2 feet of common mode inductance L4 are connect with the 1 of connector XS2,3 feet and connector of common mode inductance L4
2 connections of XS2；TVS protects chip D6, and 1 foot of TVS protection chip D6 is connected with 2 feet of common mode inductance L4, and TVS protects chip
2 feet of D6 are connected with 3 feet of common mode inductance L4.
The present invention has the following advantages that compared with prior art：The gas of the device of the invention one side real-time monitoring inside tires
Pressure value and temperature value, occur air pressure is excessively high, air pressure is too low, temperature excessively high abnormal conditions when and alarm, remind car owner it is timely
Debugging guarantees traffic safety；On the other hand double-shaft acceleration sensor information is provided to vehicle navigator, when not receiving
When GPS signal or weak GPS signal, vehicle navigator is automatically positioned and is led according to double-shaft acceleration sensor information
Boat, to guarantee the accuracy and continuity of navigation information.Sensor chip used by TPMS monitoring modular is small in size, can
With all rim types, FXTH8705116T1 outer dimension only has 7 × 7mm, and weight only has 0.3g, is minimum currently on the market
Most light sensor chip；Sensor used by TPMS monitoring modular provides X-axis and Z axis dual acceleration sensor information, branch
Automatic positioning function is held, solves positioning when vehicle navigator does not receive GPS signal or weak GPS signal and navigation problem；
Compared with tire pressure receiver is integrated into the mode shown in instrument, TPMS controller and vehicle navigator are communicated by CAN bus
Be conducive to auto vendor and flexible configuration is carried out according to car owner's demand.
Detailed description of the invention
Fig. 1 is structural block diagram of the invention；
Fig. 2 is the circuit structure diagram of TPMS monitoring modular；
Fig. 3 is the circuit structure diagram of single-chip microcontroller；
Fig. 4 is the circuit structure diagram of wireless receiver；
Fig. 5 is the circuit structure diagram of CAN interface.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment carries out under the premise of the technical scheme of the present invention
Implement, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following implementation
Example.
As shown in Figure 1, the present embodiment TPMS monitoring modular 1 and TPMS controller 2 form.Wherein, TPMS monitoring modular 1 is pacified
On the wheel rim of each inside tires, it is responsible for air pressure, temperature and the two-axis acceleration information of detection inside tires, and with wireless
Communication mode issues TPMS controller 2.TPMS controller 2 is responsible for receiving tire internal air pressure, temperature and two-axis acceleration information,
And abnormality processing is carried out to atmospheric pressure value, temperature value, processing result and atmospheric pressure value, temperature value and double-shaft acceleration sensor value are beaten
Vehicle navigator 3 is sent to by CAN interface 23 after packet.On the one hand vehicle navigator 3 shows the current atmospheric pressure value of each tire, temperature
Angle value and warning message, on the other hand when GPS signal is weak or does not receive, vehicle navigator 3 is according to two-axis acceleration information
Carry out autonomous positioning navigation.
TPMS controller 2 includes wireless receiver 21, single-chip microcontroller 22, CAN interface 23 and power module 24, the single-chip microcontroller
22 receive the detection information of TPMS monitoring modular 1 by wireless receiver 21, and carry out abnormality processing to atmospheric pressure value, temperature value,
It is vehicle-mounted by being sent to after processing result and atmospheric pressure value, temperature value and the packing of double-shaft acceleration sensor value by CAN interface 23
Omniselector 3, the power module 24 are respectively powered wireless receiver 21, single-chip microcontroller 22, CAN interface 23.
TPMS monitoring modular 1 is powered using 3V battery, 1 FXTH8705116T1 of used sensor chip model.
FXTH8705116T1 is the high integration TPMS sensor of new generation that NXP company releases.The sensor is encapsulated using QFN, shape
Size only has 7 × 7mm, smaller than the size of 9 × 9mm of previous generation sensor by 40%, and it is smaller lighter to be conducive to TPMS monitoring modular 1
Design, to adapt to various sizes of wheel rim requirement；Chip interior is not only integrated with pressure sensor, temperature sensor, acceleration
Sensor, MCU, radiofrequency launcher, low frequency receiver and exploitation firmware, and acceleration transducer supports X-axis and Z weeks two sides
To acceleration analysis, the ability for the automatic positioning not having with previous generation sensor；The minimum 1.8V of operating voltage, pressure
Test scope be 100~450kPa, temperature measurement range be -40 DEG C~125 DEG C, Z axis acceleration analysis range be -210g~+
240g, X-axis acceleration analysis range are -80g~+90g, and transmitting power consumption is less than 8mA, are conducive to substantially to extend battery and use the longevity
Life；8 22 kernels of S08 single-chip microcontroller are internally integrated, and configure 512 byte RAM and 16K high-capacity flash memories, while outside being supported to deposit
Reservoir extension, greatly facilitates user flexibility application and development；High frequency supports the modulation of ASK and FSK bimodulus, and modulation centre frequency is simultaneously
Support North America TPMS standard 315MHz and Europe TPMS standard 433.93MHz, LF communication frequency is 125KHz, using ASK tune
Molding formula.
The circuit structure of sensor FXTH8705116T1 is as shown in Fig. 2, battery DC1 nominal voltage is 3V, with filtered electrical
Anode is connect with the pin 7 of D1 and pin 8 after holding C1 parallel connection, and pin 6, pin 9 and the pin 10 of battery cathode and D1 connect.It is brilliant
Vibration G1 is 26MHz, and the both ends G1 are connect with the pin of D1 13 and pin 14 respectively, and connect be followed by with load capacitance C3 and C4 respectively
Ground.XS1 is debugging interface, and 1 foot of XS1 and the pin 15 of D1 connect, and 2 feet of XS1 and the pin 5 of D1 connect, 3 feet of XS1 with
4 feet of VDD connection, XS1 are connected to ground.Low frequency reception circuit is used to receive the low frequency control command from handheld configuration terminal,
The test functions such as wake-up, the forced-triggered of TPMS monitoring modular 1 are completed, by resistance R1, capacitor C2 and low-frequency antenna L1 in parallel
Composition is connected with the pin of D1 17 and pin 16 respectively after R1, C2 and L1 three are in parallel, and LF communication frequency is 125KHz.It is high
The transmit-receive radio road that takes place frequently is used for sensing datas such as the air pressure of receiver wireless transmission, temperature, acceleration, by matching capacitance C5, inductance
L3 and inductance L2 composition, valve cock are connect as high frequency antenna with capacitor C5 and inductance L3.High-frequency work center frequency point is to pass through
The carrier frequency register control bit CF realization of chip interior is set, and CF is set as 0 and shows that carrier frequency is 315MHz, and CF is set as 1 table
Bright carrier frequency is 433.92MHz.The one end capacitor C6 is connect with pin 12, other end ground connection.
TPMS controller 2 is made of wireless receiver 21, single-chip microcontroller 22, CAN interface 23 and power module 24, is responsible for reception
Air pressure, temperature and the two-axis acceleration information of inside tires, and to atmospheric pressure value, temperature value carry out abnormality processing, processing result and
Vehicle navigator 3 is sent to after atmospheric pressure value, temperature value and double-shaft acceleration sensor value are packaged and by CAN interface 23.Its
In, the chip model that wireless receiver 21 uses is 1 MAX1471, and the chip model that single-chip microcontroller 22 uses is 1
STM8AF5288TC, 1 SN65HVDA541-Q1 of chip model that CAN interface 23 uses, power module 24 use chip-shaped
Number be 1 BD3571FP.
STM8AF5288TC is 8 single-chip microcontrollers 22 of high-performance that ST company is specifically applied to automobile electronics, work electricity
Press 2.95V~5.5V, compatible 3.3V and 5V application design；- 40 DEG C of operating temperature range~150 DEG C fill TPMS automobile before meeting
Grade quality requirement；Chip interior integrates 64K byte FLASH, 6K byte RAM and 2K byte EEPROM, it is sufficient to meet TPMS control
The demand of device 2 program development and data processing；Internal CAN controller supports high-speed CAN 2.0B technical standard, internal LIN control
Device supports LIN2.1 technical standard, to provide convenience with interior other electronic equipments interconnection.
The circuit structure of STM8AF5288TC as shown in figure 3, operating voltage VCC is+5V, pin 8, pin 32, pin 7,
Pin 13 is all connected to VCC, and one end connects VCC, other end ground connection after filter capacitor C12, C11 are in parallel.Pin 4, draws pin 31
Foot 5, pin 14 are all connected to ground.The one end capacitor C17 is connect with pin 6, other end ground connection.Resistance R7 and capacitor C15 composition is multiple
Position circuit, provides nRESET signal to pin 1.XS4 is software debugging interface, and 1 foot of XS4 and the pin 42 of D4 connect, XS4's
The connection of the pin 1 of 2 feet and D4,3 feet of XS4 are connect with VCC, and 4 feet of XS4 are connected to ground.Network label nCS, SCLK of D4,
DATAOUT, DIO are the communications control signals between wireless receiver 21MAX1471, and in MAX1471 circuit diagram
NCS, SCLK, DATAOUT, DIO signal are corresponding to be connected.The network label MCU- of D4>CAN,CAN->MCU, CAN-ON are and CAN
Communications control signal between 23 chip SN65HVDA541-Q1 of interface, and with the MCU- in SN65HVDA541-Q1 circuit diagram>
CAN,CAN->MCU, CAN-ON signal are corresponding to be connected.Network label LED1, LED2 of D4 be red light emitting diodes 1 respectively, red
The control signal of color light emitting diode 2, two pole of emitting red light, 1 pipe, which is always on, indicates that 2 wireless receiving function of TPMS controller is abnormal, red
2 pipe of color light-emitting diodes, which is always on, indicates that 23 communication function of TPMS controller 2CAN interface is abnormal.
MAX1471 is the low-power consumption of MAXIM company release, binary channels, CMOS superhet wireless receiver 21, operating temperature
- 40 DEG C of range~125 DEG C meet the requirement of automotive grade credit rating；ASK mode receiving sensitivity is -114dBm, and FSK mode connects
Receipts sensitivity is 108dBm, supports ASK modulating mode data and FSK modulation mode data is non-delay exports simultaneously, carrier frequency
For 300MHz~450MHz；The compatible 3V and 5V operation of operating voltage, continuous reception state power consumption only have 7mA, suspend mode power consumption
Down to 1.1 μ A, it is widely used in the high reliability application fields such as keyless entry (RKE), TPMS, security system, medical treatment.
For the circuit structure of MAX1471 as shown in figure 4, pin 29 is energization pins VCC, voltage value is+5V.The one end resistance R6
It is connect with D3 pin 1, the other end is connect with capacitor C10 and pin 2；Mono- termination pins 3 of capacitor C13, other end ground connection, capacitor
Mono- termination pins 4 of C14, the other end are connected with pin 2；When communicating carrier frequency is 433.92MHz, crystal oscillator G2 be should be
13.2256MHz, when communicating carrier frequency is 315MHz, crystal oscillator G2 should be 9.509MHz, after crystal oscillator G2 connects with capacitor C16, C18
It is connected respectively with pin 5 and pin 6；Pin 7 exports 3V analog voltage, mono- termination pins 7 of filter capacitor C22, and the other end is grounded,
The 3V voltage that pin 7 exports simultaneously is connected with pin 24, mono- termination pins 24 of filter capacitor C32, other end ground connection；Receiving antenna
XS3 is connected with after matching capacitance C21, matching L5 series connection with pin 8, mono- termination pins 9 of inductance L6, other end ground connection；Inductance L7
One end is connect with capacitor C23 and pin 10 after in parallel with capacitor C27, and the other end is connected with capacitor C25 and capacitor C28；D7 is
10.7MHz intermediate-frequency filter, pin 13 are connected with 1 foot of D7, the 2 feet ground connection of D7, the 3 foot intermediate-frequency filters output of D7 and pin
16 connections, mono- termination pins 15 of capacitor C29, other end ground connection；Resistance R8 and capacitor C30 forms low-pass filter and as data
The thresholding of conversion, resistance R8 are serially connected between pin 19 and pin 20, mono- termination pins 19 of capacitor C30, other end ground connection；Capacitor
Mono- termination pins 21 of C26, other end ground connection, mono- termination pins 22 of capacitor C24, another termination pins 20；The network label of D3
NCS, SCLK, DATAOUT, DIO are phases corresponding with nCS, SCLK, DATAOUT, DIO signal in STM8AF5288TC circuit diagram
Even.
SN65HVDA541-Q1 is the high-speed CAN transponder chip that TI company aims at that automotive electronics application is released, not only just
Normal operating temperature range (- 40 DEG C~125 DEG C) meets the requirement of automotive grade credit rating, and takes overvoltage protection, bus
Error protection, Thermal shutdown protection, ESD protection etc. multiple interfaces safeguard procedures, with the interface of single-chip microcontroller 22 adapt to automatically 3V~
5.33V logic level is supported low-power consumption mode and is received to wake up, meets ISO 11898-2 and ISO 11898-5 code requirement,
Suitable for SAE J2284 high-speed CAN, SAE J1939 standard data bus interface, 11783 standard data bus interface of ISO etc.
A variety of applications.
The circuit structure of SN65HVDA541-Q1 as shown in figure 5, D5 network label MCU->CAN,CAN->MCU,CAN-
MCU- in ON and STM8AF5288TC circuit diagram>CAN,CAN->MCU, CAN-ON signal are corresponding to be connected, when CAN-ON is high electricity
Flat, SN65HVDA541-Q1 enters the suspend mode of low-power consumption, when CAN-ON is that low level is then normally received and dispatched；Pin 3VCC voltage
Being worth is+5V, mono- termination pins 3 of filter capacitor C19, and other end ground connection, pin 5 is connected with pin 3, and filter capacitor C20 mono- is terminated
Pin 5, other end ground connection；The pin 7 of D5 is connect with 1 foot of common mode inductance L4, and the pin 6 of D5 and 4 feet of common mode inductance L4 connect
It connects, 2 feet of L4 are connect with the 1 of connector XS2, and 3 feet of L4 are connect with the 2 of connector XS2, and L4 plays the work for inhibiting common-mode noise
With；D6 is that TVS protects chip PESD1CAN, protects the not breakdown loss of D5,1 foot and L4 of D6 for transient suppression overvoltage pulse
2 feet be connected, 2 feet of D6 are connected with 3 feet of L4.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (6)
1. a kind of preceding dress TPMS device for supporting automatic positioning function, which is characterized in that controlled including TPMS monitoring modular and TPMS
Device processed；The TPMS monitoring modular is used to detect air pressure, temperature and the two-axis acceleration information of inside tires and leads to the information
It crosses wireless communication and is sent to TPMS controller, the TPMS controller includes wireless receiver, single-chip microcontroller, CAN interface and power supply
Module, the single-chip microcontroller receives the detection information of TPMS monitoring modular by wireless receiver, and carries out to atmospheric pressure value, temperature value
Abnormality processing is sent after being packaged processing result and atmospheric pressure value, temperature value and double-shaft acceleration sensor value by CAN interface
To vehicle navigator, the power module is respectively powered wireless receiver, single-chip microcontroller, CAN interface.
2. a kind of preceding dress TPMS device for supporting automatic positioning function according to claim 1, which is characterized in that described
TPMS monitoring modular is powered using 3V battery, and the TPMS monitoring modular has tyre pressure sensor, and concrete model is
FXTH8705116T1 chip.
3. a kind of preceding dress TPMS device for supporting automatic positioning function according to claim 2, which is characterized in that the tire
Pressure sensor includes chip D1, battery DC1, filter capacitor C1, crystal oscillator G1, load capacitance C3, load capacitance C4, debugging interface
XS1, resistance R1, capacitor C2, low-frequency antenna L1, matching capacitance C5, inductance L3, inductance L2, capacitor C6；Battery DC1 and filtered electrical
Anode is connect with the pin 7 of chip D1 and pin 8 after holding C1 parallel connection, pin 6, pin 9 and the pin of battery cathode and chip D1
10 connections, crystal oscillator G1 are 26MHz, and the both ends crystal oscillator G1 connect with the pin 13 of chip D1 and pin 14 respectively, and respectively with load
Capacitor C3 is grounded after connecting with C4, and 1 foot of debugging interface XS1 and the pin 15 of D1 connect, 2 feet and chip of debugging interface XS1
The pin 5 of D1 connects, and 3 feet of debugging interface XS1 are connect with VDD, and 4 feet of debugging interface XS1 are connected to ground, resistance R1, capacitor
It is connected respectively with the pin 17 of chip D1 and pin 16 after C2, low-frequency antenna L1 three are in parallel, the one end inductance L2 connects VDD, separately
One end is connect with the pin 11 of chip D1, and the one end inductance L3 is connected on high frequency antenna, and the other end is connected to the pin of chip D1
On 11, one end of matching capacitance C5 is connected to high frequency antenna, other end connection ground connection, the pin 12 of the one end capacitor C6 and chip D1
Connection, other end ground connection.
4. a kind of preceding dress TPMS device for supporting automatic positioning function according to claim 2, which is characterized in that the list
Piece machine is STM8AF5288TC chip, including chip D4, filter capacitor C12, filter capacitor C11, capacitor C17, resistance R7, capacitor
C15, software debugging interface XS4；The operating voltage VCC of chip D4 is+5V, pin 8, pin 32, the pin 7, pin of chip D4
13 are all connected to VCC, and one end connects VCC, other end ground connection, pin 4, the pin of chip D4 after filter capacitor C12, C11 are in parallel
31, pin 5, pin 14 are all connected to ground, and the one end capacitor C17 connect with the pin 6 of chip D4, and the other end is grounded, resistance R7 with
Capacitor C15 forms reset circuit, provides nRESET signal to the pin 1 of chip D4,1 foot and chip of software debugging interface XS4
The pin 42 of D4 connects, and 2 feet of software debugging interface XS4 are connect with the pin 1 of chip D4,3 feet of software debugging interface XS4 and
4 feet of VCC connection, software debugging interface XS4 are connected to ground.
5. a kind of preceding dress TPMS device for supporting automatic positioning function according to claim 4, which is characterized in that the nothing
Line receiver is MAX1471 chip, including chip D3, resistance R6, capacitor C10, capacitor C13, crystal oscillator G2, capacitor C16, capacitor
C18, wave capacitor C22, filter capacitor C32, receiving antenna XS3, matching capacitance C21, inductance L5, inductance L6, inductance L7, capacitor
C27, capacitor C23, capacitor C25, capacitor C28, intermediate-frequency filter D7, capacitor C29, resistance R8, capacitor C30, capacitor C26, capacitor
C24；The pin 29 of chip D3 is energization pins VCC, and voltage value is+5V, and the one end resistance R6 is connect with chip D3 pin 1, another
End is connect with capacitor C10 and pin 2；Mono- termination pins 3 of capacitor C13, other end ground connection, mono- termination pins 4 of capacitor C14 are another
End is connected with pin 2；Crystal oscillator G2 is connected with pin 5 and pin 6 respectively after connecting with capacitor C16, capacitor C18；Chip D3's draws
Foot 7 exports 3V analog voltage, mono- termination pins 7 of filter capacitor C22, other end ground connection, while the 3V voltage of the output of pin 7 and draws
Foot 24 is connected, mono- termination pins 24 of filter capacitor C32, other end ground connection；Receiving antenna XS3 and matching capacitance C21, inductance L5 go here and there
It is connected after connection with pin 8, mono- termination pins 9 of inductance L6, other end ground connection；One end and capacitor after inductance L7 is in parallel with capacitor C27
C23 and pin 10 connect, and the other end is connected with capacitor C25 and capacitor C28；Intermediate-frequency filter D7, pin 13 and intermediate frequency filtering
1 foot of device D7 is connected, and the 2 feet ground connection of intermediate-frequency filter D7, the output of 3 foot intermediate-frequency filters and the pin 16 of intermediate-frequency filter D7 connects
It connects, mono- termination pins 15 of capacitor C29, other end ground connection；Resistance R8 and capacitor C30 forms low-pass filter and as data conversion
Thresholding, resistance R8 is serially connected between pin 19 and pin 20, mono- termination pins 19 of capacitor C30, other end ground connection；Capacitor C26
One termination pins 21, other end ground connection, mono- termination pins 22 of capacitor C24, another termination pins 20；The network label of chip D3
NCS, SCLK, DATAOUT, DIO are are connected corresponding with nCS, SCLK, DATAOUT, DIO signal of chip D4.
6. a kind of preceding dress TPMS device for supporting automatic positioning function according to claim 4, which is characterized in that described
CAN interface is SN65HVDA541-Q1 chip, including chip D5, filter capacitor C19, filter capacitor C20, common mode inductance L4, company
Meet device XS2, TVS protection chip D6；The network label MCU- of chip D5>CAN,CAN->MCU, CAN-ON and STM8AF5288TC
MCU- in chip>CAN,CAN->MCU, CAN-ON signal are corresponding to be connected, when CAN-ON is high level, SN65HVDA541-Q1
Into the suspend mode of low-power consumption, when CAN-ON is that low level is then normally received and dispatched；The pin 3VCC voltage value of chip D5 is+5V,
Mono- termination pins 3 of filter capacitor C19, other end ground connection, pin 5 are connected with pin 3, mono- termination pins 5 of filter capacitor C20, separately
One end ground connection；The pin 7 of chip D5 is connect with 1 foot of common mode inductance L4, and the pin 6 of chip D5 and 4 feet of common mode inductance L4 connect
It connects, 2 feet of common mode inductance L4 are connect with the 1 of connector XS2, and 3 feet of common mode inductance L4 are connect with the 2 of connector XS2；TVS is protected
Chip D6 is protected, 1 foot of TVS protection chip D6 is connected with 2 feet of common mode inductance L4, and TVS protects 2 feet and common mode inductance of chip D6
3 feet of L4 are connected.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810726115.7A CN108873780A (en) | 2018-07-04 | 2018-07-04 | A kind of preceding dress TPMS device for supporting automatic positioning function |
| CN201920792087.9U CN209858980U (en) | 2018-07-04 | 2019-05-29 | Front-mounted TPMS device supporting automatic positioning function |
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| CN201810726115.7A CN108873780A (en) | 2018-07-04 | 2018-07-04 | A kind of preceding dress TPMS device for supporting automatic positioning function |
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| CN201810726115.7A Withdrawn CN108873780A (en) | 2018-07-04 | 2018-07-04 | A kind of preceding dress TPMS device for supporting automatic positioning function |
| CN201920792087.9U Expired - Fee Related CN209858980U (en) | 2018-07-04 | 2019-05-29 | Front-mounted TPMS device supporting automatic positioning function |
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| CN112504548A (en) * | 2019-08-23 | 2021-03-16 | 武汉杰开科技有限公司 | Composite sensor, processing method thereof and TPMS chip |
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|---|---|
| CN209858980U (en) | 2019-12-27 |
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Inventor after: Li Yanhua Inventor after: Xiao Wenguang Inventor after: Yao Qingfeng Inventor after: Yang Lijuan Inventor after: Wang Hairong Inventor before: Li Yanhua Inventor before: Yao Qingfeng Inventor before: Yang Lijuan Inventor before: Xiao Wenguang Inventor before: Wang Hairong |
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Application publication date: 20181123 |