CN104908681A - Vehicle speed signal conditioning transition system and control method thereof - Google Patents
Vehicle speed signal conditioning transition system and control method thereof Download PDFInfo
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- CN104908681A CN104908681A CN201510346789.0A CN201510346789A CN104908681A CN 104908681 A CN104908681 A CN 104908681A CN 201510346789 A CN201510346789 A CN 201510346789A CN 104908681 A CN104908681 A CN 104908681A
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- vehicle speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
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- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a vehicle speed signal conditioning transition system and a control method thereof. The control method comprises the steps that firstly, a vehicle speed signal is collected through an odometer sensor; then the collected vehicle speed signal is subjected to hardware filtering processing through a filtering circuit; next, the vehicle speed signal after the hardware filtering processing is subjected to software filtering processing through a single chip microcomputer; finally, the vehicle speed signal after the software filtering processing is converted into multiplexed vehicle speed signals through a multiplexed output circuit to be output. The vehicle speed signal conditioning transition system and the control method thereof can convert the one-path input into multiple stable output signals to allow different components to use, a CAN bus output function is also achieved, and the vehicle speed signal can be input into a whole vehicle CAN network through a CAN bus.
Description
Technical field
The invention belongs to vehicle speed signal conversion art, be specifically related to a kind of vehicle speed signal conditioning converting system and control method thereof.
Background technology
At present, heavily kilometer sensor many employings mechanical type kilometer sensor of card automobile, this sensor construction is simple, cost is low, but transmit speed ratio owing to adopting mechanical gear, vehicle speed signal is of poor quality, there is more burr, the parts for the accurate level and smooth vehicle speed signal of many needs are difficult to reach demand.Modern Heavy truck simultaneously, need the parts of vehicle speed signal to get more and more, single vehicle speed signal source cannot satisfy the demands.
Some employing electronic odometer sensor of the kilometer sensor of domestic heavy truck replaces mechanical type kilometer sensor, can obtain the good impulse singla of quality, but still cannot meet the demand of multichannel vehicle speed signal.On market, the recoverable amount of mechanical type kilometer sensor is still very large.In hydrodynamic retarder extension process, there is a large amount of repacking vehicle needs, now the signal quality of mechanical type kilometer sensor cannot satisfy the demands, on the other hand because mechanical sensor is with secondary gear transmission device, often turn pulse count after changing electronic sensor into change, cause mileage meter to show the speed of a motor vehicle and accelerate; Meanwhile, need kilometer sensor to provide vehicle speed signal to instrument and retarder when installing retarder additional, existing sensor cannot meet repacking demand simultaneously.
Summary of the invention
A kind of vehicle speed signal is the object of the present invention is to provide to nurse one's health converting system and control method thereof, to overcome the defect that above-mentioned prior art exists, Neng Jiang mono-tunnel of the present invention input changes into multiple stable output signal, for different parts, also there is CAN output function, vehicle speed signal can be outputted to car load CAN network by CAN.
For achieving the above object, the present invention adopts following technical scheme:
A kind of vehicle speed signal conditioning converting system, comprises filter circuit, carries out hardware filtering process for the vehicle speed signal collected kilometer sensor; Micro controller system, for carrying out software filtering process to the vehicle speed signal after hardware filtering process; Power module, for providing working power for micro controller system; Multiplex output circuit, exports for the vehicle speed signal after software filtering process being converted into multichannel vehicle speed signal.
Further, also CAN transceiver is comprised: for the vehicle speed signal after software filtering process is outputted to car load CAN network by CAN.
Further, kilometer sensor is mechanical type kilometer sensor or electronic odometer sensor.
Further, filter circuit comprises the first diode D1, the negative pole of the first diode D1 receives the vehicle speed signal of kilometer sensor, positive pole connects one end of the first resistance R1, the other end of the first resistance R1 connects one end of the first electric capacity C1 and the second resistance R2 respectively, the other end of the second resistance R2 connects one end of the second electric capacity C2 and the base stage of the first aerotron Q1, the other end of the first electric capacity C1 connects the other end of the second electric capacity C2 and ground connection, the collecting electrode of the first aerotron Q1 is connected to one end of the 3rd resistance R3 and one end of Schmidt trigger, the grounded emitter of the first aerotron Q1, the other end of the 3rd resistance R3 connects power supply, the other end of Schmidt trigger connects one end of the 3rd electric capacity C3 and the input end of micro controller system, the other end of the 3rd electric capacity C3 connects the other end of the second electric capacity C2 and ground connection.
Further, multiplex output circuit comprises the second diode D2, vehicle speed signal after the positive pole reception software filtering process of the second diode D2, negative pole connects one end of the 4th resistance R4, the other end of the 4th resistance R4 connects the second aerotron Q2 respectively, the base stage of the 3rd aerotron Q3 and the 4th aerotron Q4 ground connection, second aerotron Q2 collecting electrode connects one end of the 5th resistance R5 respectively and exports, the collecting electrode of the 3rd aerotron Q3 connects one end of the 6th resistance R6 respectively and exports, the collecting electrode of the 4th aerotron Q4 connects one end of the 7th resistance R7 respectively and exports, 5th resistance R5, the other end of the 6th resistance R6 and the 7th resistance R7 all connects power supply, second aerotron Q2, the equal ground connection of emitter of the 3rd aerotron Q3 and the 4th aerotron Q4.
A control method for vehicle speed signal conditioning converting system, comprises the following steps:
Step one: gather vehicle speed signal by kilometer sensor;
Step 2: hardware filtering process is carried out to the vehicle speed signal collected;
Step 3: software filtering process is carried out to the vehicle speed signal after hardware filtering process;
Step 4: the vehicle speed signal after software filtering process is converted into multichannel vehicle speed signal and exports.
Compared with prior art, the present invention has following useful technique effect:
The vehicle speed signal that present system is sent by filter circuit reception kilometer sensor, through hardware integer (namely adopting the waveform of filter circuit to vehicle speed signal to process), then by software filtering, the vehicle speed signal with clutter can be converted to level and smooth, stable impulse singla and be supplied to associated components use.A feature of present system has multiple output function, and the input of Neng Jiang mono-tunnel changes into multiple stable output signal, for different parts.
Further, the present invention also has CAN output function, vehicle speed signal can be outputted to car load CAN network by CAN.
Further, the present invention is all applicable for the vehicle transformation of installing mechanical type kilometer sensor or electronic odometer sensor.
Further, filter circuit adopts RC filtering and Schmidt's integer, better can carry out filtering process to the vehicle speed signal collected.
The inventive method processes the vehicle speed signal that kilometer sensor sends through hardware filtering and software filtering, the vehicle speed signal with clutter can be converted to level and smooth, stable impulse singla and be supplied to associated components use.The inventive method the input of Neng Jiang mono-tunnel can change into multiple stable output signal, for different parts.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present invention;
Fig. 2 is filter circuit figure of the present invention;
Fig. 3 is multiplex output circuit figure of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail:
See Fig. 1 to Fig. 3, a kind of vehicle speed signal conditioning converting system, comprises filter circuit, carries out hardware filtering process for the vehicle speed signal collected kilometer sensor (mechanical type kilometer sensor or electronic odometer sensor); Micro controller system, for carrying out software filtering process to the vehicle speed signal after hardware filtering process, comprise A/D, D/A translation function, for catching vehicle speed pulse and the impulse singla after conditioning being converted into analog output, and vehicle speed signal pulse count is converted to the quantity of mating with former car instrument; Power module, for providing working power for micro controller system; Multiplex output circuit, exporting for the vehicle speed signal after software filtering process being converted into multichannel vehicle speed signal, also comprising CAN transceiver: for the vehicle speed signal after software filtering process is outputted to car load CAN network by CAN.
Filter circuit comprises the first diode D1, the negative pole of the first diode D1 receives the vehicle speed signal of kilometer sensor, positive pole connects one end of the first resistance R1, the other end of the first resistance R1 connects one end of the first electric capacity C1 and the second resistance R2 respectively, the other end of the second resistance R2 connects one end of the second electric capacity C2 and the base stage of the first aerotron Q1, the other end of the first electric capacity C1 connects the other end of the second electric capacity C2 and ground connection, the collecting electrode of the first aerotron Q1 is connected to one end of the 3rd resistance R3 and one end of Schmidt trigger 1, the grounded emitter of the first aerotron Q1, the other end of the 3rd resistance R3 connects power supply, the other end of Schmidt trigger 1 connects one end of the 3rd electric capacity C3 and the input end of micro controller system, the other end of the 3rd electric capacity C3 connects the other end of the second electric capacity C2 and ground connection.
Multiplex output circuit comprises the second diode D2, vehicle speed signal after the positive pole reception software filtering process of the second diode D2, negative pole connects one end of the 4th resistance R4, the other end of the 4th resistance R4 connects the second aerotron Q2 respectively, the base stage of the 3rd aerotron Q3 and the 4th aerotron Q4 ground connection, second aerotron Q2 collecting electrode connects one end of the 5th resistance R5 respectively and exports, the collecting electrode of the 3rd aerotron Q3 connects one end of the 6th resistance R6 respectively and exports, the collecting electrode of the 4th aerotron Q4 connects one end of the 7th resistance R7 respectively and exports, 5th resistance R5, the other end of the 6th resistance R6 and the 7th resistance R7 all connects power supply, second aerotron Q2, the equal ground connection of emitter of the 3rd aerotron Q3 and the 4th aerotron Q4.
A control method for vehicle speed signal conditioning converting system, comprises the following steps:
Step one: gather vehicle speed signal by kilometer sensor;
Step 2: hardware filtering process is carried out to the vehicle speed signal collected;
Step 3: software filtering process is carried out to the vehicle speed signal after hardware filtering process;
Step 4: the vehicle speed signal after software filtering process is converted into multichannel vehicle speed signal and exports.
Below implementation process of the present invention is described in further detail:
For hydrodynamic retarder retrofit process, if former car is mechanical type kilometer sensor, the impulse singla that it sends is unstable, the demand of retarder fixed speed control can not be met, electronic odometer sensor is adopted to replace mechanical type kilometer sensor can obtain the good impulse singla of quality, but still cannot meet the demand of multichannel vehicle speed signal, on the other hand because mechanical sensor is with secondary gear transmission device, often turn pulse count after changing electronic sensor into change, cause mileage meter to show the speed of a motor vehicle to accelerate, micro controller system of the present invention can change output pulse count, to adapt to the mileage meter display of former car.Application the present invention, by the input end of the vehicle speed signal mouth of kilometer sensor access present system, through this system hardware integer (being processed signal waveform by hardware circuit), after software filtering (signal waveform being processed by software), the impulse singla of instability is converted into stable impulse singla exported by an output port, then through multiplex output circuit, output multi-channel vehicle speed signal, wherein retarder MCU just can obtain smoothly, stable vehicle speed signal is to meet the demand of fixed speed control, other output ports are supplied to instrument etc. impulse singla, meet the demand of multiple parts to vehicle speed signal.
Claims (6)
1. a vehicle speed signal conditioning converting system, is characterized in that, comprise filter circuit, carry out hardware filtering process for the vehicle speed signal collected kilometer sensor; Micro controller system, for carrying out software filtering process to the vehicle speed signal after hardware filtering process; Power module, for providing working power for micro controller system; Multiplex output circuit, exports for the vehicle speed signal after software filtering process being converted into multichannel vehicle speed signal.
2. a kind of vehicle speed signal conditioning converting system according to claim 1, is characterized in that, also comprise CAN transceiver: for the vehicle speed signal after software filtering process is outputted to car load CAN network by CAN.
3. a kind of vehicle speed signal conditioning converting system according to claim 1, it is characterized in that, kilometer sensor is mechanical type kilometer sensor or electronic odometer sensor.
4. a kind of vehicle speed signal conditioning converting system according to claim 1, it is characterized in that, filter circuit comprises the first diode (D1), the negative pole of the first diode (D1) receives the vehicle speed signal of kilometer sensor, positive pole connects one end of the first resistance (R1), the other end of the first resistance (R1) connects one end of the first electric capacity (C1) and the second resistance (R2) respectively, the other end of the second resistance (R2) connects one end of the second electric capacity (C2) and the base stage of the first aerotron (Q1), the other end of the first electric capacity (C1) connects the other end of the second electric capacity (C2) and ground connection, the collecting electrode of the first aerotron (Q1) is connected to one end of the 3rd resistance (R3) and one end of Schmidt trigger (1), the grounded emitter of the first aerotron (Q1), the other end of the 3rd resistance (R3) connects power supply, the other end of Schmidt trigger (1) connects one end of the 3rd electric capacity (C3) and the input end of micro controller system, the other end of the 3rd electric capacity (C3) connects the other end of the second electric capacity (C2) and ground connection.
5. a kind of vehicle speed signal conditioning converting system according to claim 4, it is characterized in that, multiplex output circuit comprises the second diode (D2), vehicle speed signal after the positive pole reception software filtering process of the second diode (D2), negative pole connects one end of the 4th resistance (R4), the other end of the 4th resistance (R4) connects the second aerotron (Q2) respectively, the base stage of the 3rd aerotron (Q3) and the 4th aerotron (Q4) ground connection, second aerotron (Q2) collecting electrode connects one end of the 5th resistance (R5) respectively and exports, the collecting electrode of the 3rd aerotron (Q3) connects one end of the 6th resistance (R6) respectively and exports, the collecting electrode of the 4th aerotron (Q4) connects one end of the 7th resistance (R7) respectively and exports, 5th resistance (R5), the other end of the 6th resistance (R6) and the 7th resistance (R7) all connects power supply, second aerotron (Q2), the equal ground connection of emitter of the 3rd aerotron (Q3) and the 4th aerotron (Q4).
6. a control method for vehicle speed signal conditioning converting system, adopts the vehicle speed signal conditioning converting system described in any one of Claims 1 to 5, it is characterized in that, comprise the following steps:
Step one: gather vehicle speed signal by kilometer sensor;
Step 2: hardware filtering process is carried out to the vehicle speed signal collected;
Step 3: software filtering process is carried out to the vehicle speed signal after hardware filtering process;
Step 4: the vehicle speed signal after software filtering process is converted into multichannel vehicle speed signal and exports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510346789.0A CN104908681A (en) | 2015-06-19 | 2015-06-19 | Vehicle speed signal conditioning transition system and control method thereof |
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| CN201510346789.0A CN104908681A (en) | 2015-06-19 | 2015-06-19 | Vehicle speed signal conditioning transition system and control method thereof |
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| CN201510346789.0A Pending CN104908681A (en) | 2015-06-19 | 2015-06-19 | Vehicle speed signal conditioning transition system and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111130847A (en) * | 2019-11-28 | 2020-05-08 | 深圳市元征科技股份有限公司 | Data configuration method and data filtering method of hardware filter and related products |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07271408A (en) * | 1994-03-30 | 1995-10-20 | Hitachi Ltd | Processor for control |
| EP1325821A1 (en) * | 2000-10-13 | 2003-07-09 | Toyota Jidosha Kabushiki Kaisha | Tire burst prediction device |
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| CN101917178A (en) * | 2010-07-29 | 2010-12-15 | 北京交通大学 | Velocity transducer output signal analog device and method |
| CN204331374U (en) * | 2014-12-29 | 2015-05-13 | 上海新华控制技术(集团)有限公司 | A kind of multichannel analog amount output module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111130847A (en) * | 2019-11-28 | 2020-05-08 | 深圳市元征科技股份有限公司 | Data configuration method and data filtering method of hardware filter and related products |
| CN111130847B (en) * | 2019-11-28 | 2022-06-17 | 深圳市元征科技股份有限公司 | Data configuration method and data filtering method of hardware filter and related products |
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Application publication date: 20150916 |