CN204451862U - The two remaining vehicle tyre pressure monitor and alarm systems of modularization and this commercial vehicle/comm..vehicle - Google Patents
The two remaining vehicle tyre pressure monitor and alarm systems of modularization and this commercial vehicle/comm..vehicle Download PDFInfo
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- CN204451862U CN204451862U CN201520108126.0U CN201520108126U CN204451862U CN 204451862 U CN204451862 U CN 204451862U CN 201520108126 U CN201520108126 U CN 201520108126U CN 204451862 U CN204451862 U CN 204451862U
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Abstract
There is provided the two remaining vehicle tyre pressure monitor and alarm systems of a kind of modularization and this commercial vehicle/comm..vehicle, its collection signal path has two, and one is CAN, and two is directly gather wheel speed sensor pulse signal; It is also two that alerting signal exports, CAN and rigid line; Core controller has CAN information transmit-receive function, receive the speed of a motor vehicle and wheel speed information that send from anti-skid brake system ABS, use diagonal line comparison method independently to carry out tire pressure monitoring, simultaneously the impulse singla of the direct acquisition process wheel speed sensors of microcontroller chip MCU, improve monitoring accuracy.System connects DSP data processing module by stack, realizes high-precision tire pressure early warning and out-of-the way position identification.Hardware modularity design can solve market place differentiation demand, and for concern cost, and the user not high to accuracy requirement only configures core control panel and wheel speed pulse data acquisition processing module; The utility model improves the reliability of tire pressure monitoring system, extensibility and commonality.
Description
Technical field
The utility model belongs to field of vehicle control, is specifically related to a kind of vehicle tyre pressure monitoring system based on wheel speed.
Background technology
Along with the continuous increase of Road Transportation Volume, the particularly serious traffic accident rate that automobile causes is in rising trend, and the accident of 40% is relevant to tire, and tire pressure is the key index evaluating tire working performance.Current domestic automobile industry tire pressure monitoring system application is also in the incipient stage, only a small amount of manned vehicle configuration, and majority is based on pressure sensor, the active tire pressure monitoring system of wireless receiving and dispatching formula, this system is because need setting pressure monitoring transmitter unit on each tire, installation and maintenance cost is very high, commercial vehicle/comm..vehicle application difficult.Based on wheel speed passive type tire pressure monitoring system because of cost lower, expection can be applied extensively more next on commercial vehicle/comm..vehicle, but commercial vehicle/comm..vehicle is of a great variety, vehicle electrical systems configuration, early warning accuracy requirement, cost needs are widely different, need conveniently to carry out function, product that performance changes is with the adaptive character market demand.
Utility model content
For above-mentioned one or more problems, provide the two remaining vehicle tyre pressure monitor and alarm systems of a kind of modularization and this commercial vehicle/comm..vehicle.The utility model relates to the technology such as sensor technology, Eltec, mechanics of communication, embedded system, software, particularly the Hardware Design thought adapts to different user demands, the system architecture adopting modularization and circuit stack to connect formula realizes, ensure that the retractility of systemic-function and performance, and system, by two channel acquisition wheel speed signals, improves reliability.
Know-why of the present utility model is:
1. wheel speed information is the most important original data of native system, and all tire pressure monitoring judgements obtain after all will carrying out processing process according to wheel speed data.The precision of wheel speed data and rate of replacement determine the precision of tire pressure monitoring.The wheel speed information of native system obtains by vehicle-mounted anti-skid brake system ABS, has the data acquiring mode that two kinds different, ensure that the reliability that data source obtains.
A. obtaining each wheel speed value by CAN: this wheel speed value is the secondary wheel speed value through vehicle-mounted ABS process, is the relative velocity of the left and right wheel of each axletree of vehicle.For adopting the tire pressure monitoring of tire radius diagonal line comparison method, the wheel speed information that the method obtains can meet the general early warning accuracy requirement of system.Which hardware implementing is simple, and cost is low.MCU reads wheel speed message data by CAN interface and in addition buffer memory, after digital filter process, carries out tire pressure detection by diagonal line wheel speed comparison algorithm.
B. wheel speed pulse is directly obtained from wheel speed sensors: the method can obtain the direct signal characterizing vehicle wheel rotational speed, can obtain the wheel speed information that precision is very high, therefore be suitable for the occasion that early warning accuracy requirement is higher.The method needs to increase wheel speed transducing signal acquisition and conditioning circuit and receives the wheel speed signal coming from wheel speed sensors, by the high precision timing-counting machine in micro control unit MCU sheet, signal is detected, after buffer memory and filtering, wheel speed diagonal line comparison method just can be adopted to monitor tire pressure.Because directly gather wheel speed signal, system accuracy comparatively uses CAN data to have a distinct increment, and real-time also can be stronger.System can be expanded and use DSP data processing module, applies the frequency resonance response algorithm based on torsion spring model, can realize high-precision tire pressure early warning, and accurately identifies the tire location of abnormal tyre pressure.
2. alarm display: native system, according to the different market demands, adopts independently alarm display unit.Before having CAN network, fill market vehicle, the early warning information that system produces is sent by CAN transceiver with the form of CAN message.Receive CAN message information by instrument, and carry out alarm display.For without CAN network vehicle and rear dress market vehicle, devise independently alarm display unit, this display unit has independently CAN interface and MCU, not only can show the early warning information of tire pressure monitoring system, can also receive and other CAN nodes send, need the information of sound and light alarm, display, the reserved road alerting signal rigid line of system exports as backup, even if system still can normally early warning when ensureing CAN network failure.
The technical solution of the utility model is:
The two remaining vehicle tyre pressure monitor and early warning system of a kind of modularization, carries out tire pressure monitoring based on wheel speed, comprises core controller, alarm display unit; Core controller connects alarm display unit, vehicle-mounted anti-skid brake system ABS, particularly:
Core controller comprises CAN transceiver module, microcontroller chip MCU base control module, digital filter circuit, wheel speed pulse data acquisition processing module;
CAN transceiver module comprises CAN transceiver;
Wheel speed pulse data acquisition processing module comprises wheel speed sensors signal collection modulation circuit;
CAN transceiver, is received the speed of a motor vehicle and wheel speed information that send from anti-skid brake system ABS, and tire pressure monitoring result and alarm message is exported by CAN by CAN; CAN transceiver and microcontroller chip MCU are bi-directionally connected;
Microcontroller chip MCU base control module is built-in with diagonal line and compares tie pressure detection module, and diagonal line compares tie pressure detection module and uses diagonal line comparison method carry out tire pressure monitoring and export; Microcontroller chip MCU base control model calling has two paths of signals to gather circuit: the first acquisition of signal circuit, and microcontroller chip MCU connects CAN transceiver by digital filter circuit, receives the wheel speed information that CAN is sent; Secondary signal gathers circuit, and microcontroller chip MCU base control module connects wheel speed sensors by wheel speed sensors signal collection modulation circuit, directly obtains wheel speed information.
Further, described CAN transceiver module, microcontroller chip MCU base control module integration, on one piece of printing board PCB, form core control panel.
Further, described secondary signal Acquisition Circuit is modularized hardware structure, forms wheel speed pulse data acquisition processing module, its selectively modularization be integrated on described core control panel.
Further, core controller also comprises DSP data processing module, and DSP data processing module adopts the frequency resonance response algorithm based on torsion spring model carry out tire pressure monitoring and export monitoring result.
Further, described DSP data processing module is integrated on a printed circuit board PCB, and the mode that this printed circuit board (PCB) is connect by stack is connected with core control panel.
Further, adopt double-circuit connection mode between described alarm display unit and core controller, namely a road adopts CAN to connect, and another road adopts rigid line to connect.
Further, alarm display unit comprises CAN transceiver, instrument, and alerting signal offers instrument by CAN or rigid line, instrument with acoustooptic form early warning to chaufeur.
Further, alarm display unit comprises independently acousto-optic warning module, module comprises CAN interface and independently MCU, alarm display unit receives alerting signal by CAN or rigid line and passes to independently acousto-optic warning module, not only can show the early warning information of tire pressure monitoring system, can also receive and other CAN nodes send, need the information of sound and light alarm, display.
Further, the information that described alarm display unit is sent for receiving core control panel, alarm display unit comprises display abnormal tyre pressure position module, learning state signal module and failure message alarm module.
A kind of commercial vehicle/comm..vehicle, adopts the two remaining vehicle tyre pressure monitor and alarm system of above-mentioned modularization.
This programme principal feature is:
1. hardware modularity.System hardware is divided into three main portions: core controller, DSP data processing module, alarm display unit.Core controller is the underlying hardware of system, there is CAN receives information, sending function, the speed of a motor vehicle and wheel speed information that send from anti-skid brake system ABS can be received, use diagonal line comparison method independently can carry out tire pressure monitoring, monitoring result is exported by CAN.The direct acquisition process of microcontroller chip MCU is from the impulse singla of wheel speed sensors simultaneously, and the same diagonal line comparison method that uses carries out tire pressure monitoring, improves monitoring accuracy.System also can carry out secondary expansion, the mode connect by stack adds the stronger DSP data processing module of arithmetic capability, apply the frequency resonance response algorithm based on torsion spring model, high-precision tire pressure early warning can be realized, and accurately identify the tire location of abnormal tyre pressure, reach higher systemic-function, performance requriements.The relevant information that alarm display unit is sent for receiving core control panel, shows abnormal tyre pressure position, whether is in learning state, and failure message.Hardware modularity design can solve market place differentiation demand, for concern cost, and to tire pressure monitoring accuracy requirement not high client only configure core control panel and wheel speed pulse data acquisition processing module assembly; The client high for tire pressure monitoring accuracy requirement then configures DSP data processing module in addition; Alarm display unit is then according to vehicle assembling demand flexible configuration.
2. the two remaining of signal path.The collection signal path of this product has two, and one is by CAN, and one is by directly gathering wheel speed sensor pulse signal.Alerting signal output channel is also two, CAN and rigid line.This adds reliability to the use of product, and not only data message can compare checking, and one of them path fault, does not affect the basic function of whole system.
3. Universal joint.Microcontroller chip MCU base control module in core control panel is connected with DSP data processing module and adopts stack to connect formula structure, and the input and output of DSP data processing module connect microcontroller chip MCU base control module, the external interface form of such product just can be fixed up, realize universalization, effectively can reduce costs, and facilitate car load to install and past-sale service.
The beneficial effects of the utility model are: adopt modular dual-redundancy structure to design, can reduce cost of product, improve product reliability, greatly facilitate car load factory to configure and install tire pressure monitoring system.
Accompanying drawing explanation
Fig. 1 is the outside connection diagram of the two remaining vehicle tyre pressure monitor and early warning system of modularization of the present utility model;
Fig. 2 is portion's constructional drawing of the two remaining vehicle tyre pressure monitor and early warning system of modularization of the present utility model.
Detailed description of the invention
Now the utility model is further described in conjunction with the drawings and the specific embodiments:
With reference in its exterior connection diagram of Fig. 1, the number of axle of wheel speed sensors is equipped with in two remaining vehicle tyre pressure monitor and early warning system: the N representative of modularization, carries out sampling analysis: by the direct signal collection of wheel speed sensors from two paths to wheel speed signal; Received from ABS ECU (Electrical Control Unit) wheel speed message information by CAN.Through system identification abnormal tyre pressure and after judging position, have two kinds of warning approach according to assembling vehicle, issue instrument or alarm display unit by CAN and alerting signal rigid line, by its with acoustooptic form early warning to chaufeur.
Fig. 2 is system architecture diagram.In figure, 1. part can be found out, wheel speed signal obtains (CAN and wheel speed sensors) and realizes as autonomous system core controller one piece of pcb board with MCU micro control unit, this structural system can realize the repertoire based on wheel speed diagonal line comparison method TPMS, and cost is lower.In addition, this module is also the necessary component of the resonance frequency analysis method based on tire torsion spring model, needs to be present in whole system as wheel speed data acquisition and pre-processing module.
Instantaneous wheel speed data not only may be used for diagonal line wheel speed comparison method but also may be used for resonance frequency analysis method.When adopting diagonal line comparison method, data just can complete process in MCU, namely only need the 1. part of the in Fig. 2.And when adopting frequency analysis method, because algorithm complexity is higher, carry out spectral analysis process, related data needs to send in DSP data processing module and just can complete required Treatment Analysis task, namely to adopt in Fig. 2 the 1. part+the 2. structure of merging of part.
The DSP data processing module that arithmetic capability is stronger realizes as performance and Function Extension circuit one piece of pcb board, as in Fig. 2 2. shown in part, this part needs and MCU module exchanges wheel speed data and testing result quantity of state, connects formula terminal between the two reliably connect by PCB stack.
Alarm display part, system early warning both can offer instrument by CAN, and instrument is with acoustooptic form early warning to the function of chaufeur, and as shown in Fig. 2 1., this part has CAN transceiver, can receive and send relevant information in CAN; Also can offer independently alarm display, this module has CAN interface and independently MCU, as shown in Fig. 2 3..This display module has independently CAN interface and MCU, not only can show the early warning information of tire pressure monitoring system, can also receive other CAN nodes send, and needs the information of sound and light alarm, display.The reserved road alerting signal rigid line of system exports as backup, even if system still can normally early warning when ensureing CAN network failure.
The two remaining vehicle tyre pressure monitor and early warning system of modularization comprises core controller, alarm display unit; Core controller connects alarm display unit, vehicle-mounted anti-skid brake system ABS, particularly: core controller comprises CAN transceiver module, microcontroller chip MCU base control module, digital filter circuit, wheel speed pulse data acquisition processing module; CAN transceiver module comprises CAN transceiver; Wheel speed pulse data acquisition processing module comprises wheel speed sensors signal collection modulation circuit; CAN transceiver, is received the speed of a motor vehicle and wheel speed information that send from anti-skid brake system ABS, and tire pressure monitoring result and alarm message is exported by CAN by CAN; CAN transceiver and microcontroller chip MCU are bi-directionally connected; Microcontroller chip MCU base control module is built-in with diagonal line and compares tie pressure detection module, and diagonal line compares tie pressure detection module and uses diagonal line comparison method carry out tire pressure monitoring and export; Microcontroller chip MCU base control model calling has two paths of signals to gather circuit: the first acquisition of signal circuit, and microcontroller chip MCU connects CAN transceiver by digital filter circuit, receives the wheel speed information that CAN is sent; Secondary signal gathers circuit, and microcontroller chip MCU base control module connects wheel speed sensors by wheel speed sensors signal collection modulation circuit, directly obtains wheel speed information.
CAN transceiver module, microcontroller chip MCU base control module integration, on one piece of printing board PCB, form core control panel.Secondary signal Acquisition Circuit is modularized hardware structure, forms wheel speed pulse data acquisition processing module, its selectively modularization be integrated on described core control panel.
Core controller also comprises DSP data processing module, and DSP data processing module adopts the frequency resonance response algorithm based on torsion spring model carry out tire pressure monitoring and export monitoring result.DSP data processing module is integrated on a printed circuit board PCB, and the mode that this printed circuit board (PCB) is connect by stack is connected with core control panel.
Adopt double-circuit connection mode between alarm display unit and core controller, namely a road adopts CAN to connect, and another road adopts rigid line to connect.The information that alarm display unit is sent for receiving core control panel, alarm display unit preferably includes display abnormal tyre pressure position module, learning state signal module and failure message alarm module.
In one embodiment, alarm display unit comprises CAN transceiver, instrument, and alerting signal offers instrument by CAN or rigid line, instrument with acoustooptic form early warning to chaufeur.
In another embodiment, alarm display unit comprises independently acousto-optic warning module, module comprises CAN interface and independently MCU, alarm display unit receives alerting signal by CAN or rigid line and passes to independently acousto-optic warning module, not only can show the early warning information of tire pressure monitoring system, can also receive and other CAN nodes send, need the information of sound and light alarm, display.
A kind of commercial vehicle/comm..vehicle, adopts the two remaining vehicle tyre pressure monitor and alarm system of above-mentioned modularization.
Finally should be noted that: above embodiment is only in order to illustrate that the technical scheme of this case is not intended to limit; Although be described in detail this case with reference to preferred embodiment, those of ordinary skill in the field have been to be understood that: still can modify to the detailed description of the invention of this case or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of this case technical scheme, it all should be encompassed in the middle of the technical scheme scope of this case request protection.
Claims (10)
1. the two remaining vehicle tyre pressure monitor and alarm system of modularization, carries out tire pressure monitoring based on wheel speed, it is characterized in that, comprise core controller, alarm display unit; Core controller connects alarm display unit, vehicle-mounted anti-skid brake system ABS, particularly:
Core controller comprises CAN transceiver module, microcontroller chip MCU base control module, digital filter circuit, wheel speed pulse data acquisition processing module;
CAN transceiver module comprises CAN transceiver;
Wheel speed pulse data acquisition processing module comprises wheel speed sensors signal collection modulation circuit;
CAN transceiver, is received the speed of a motor vehicle and wheel speed information that send from anti-skid brake system ABS, and tire pressure monitoring result and alarm message is exported by CAN by CAN; CAN transceiver and microcontroller chip MCU are bi-directionally connected;
Microcontroller chip MCU base control module is built-in with diagonal line and compares tie pressure detection module, and diagonal line compares tie pressure detection module and uses diagonal line comparison method carry out tire pressure monitoring and export; Microcontroller chip MCU base control model calling has two paths of signals to gather circuit: the first acquisition of signal circuit, and microcontroller chip MCU connects CAN transceiver by digital filter circuit, receives the wheel speed information that CAN is sent; Secondary signal gathers circuit, and microcontroller chip MCU base control module connects wheel speed sensors by wheel speed sensors signal collection modulation circuit, directly obtains wheel speed information.
2. the two remaining vehicle tyre pressure monitor and alarm system of a kind of modularization according to claim 1, is characterized in that, described CAN transceiver module, microcontroller chip MCU base control module integration, on one piece of printing board PCB, form core control panel.
3. the two remaining vehicle tyre pressure monitor and alarm system of a kind of modularization according to claim 2, it is characterized in that, described secondary signal Acquisition Circuit is modularized hardware structure, forms wheel speed pulse data acquisition processing module, its selectively modularization be integrated on described core control panel.
4. the two remaining vehicle tyre pressure monitor and alarm system of a kind of modularization according to claim 3, it is characterized in that, core controller also comprises DSP data processing module, and DSP data processing module adopts the frequency resonance response algorithm based on torsion spring model carry out tire pressure monitoring and export monitoring result.
5. the two remaining vehicle tyre pressure monitor and alarm system of a kind of modularization according to claim 4, it is characterized in that, described DSP data processing module is integrated on a printed circuit board PCB, and the mode that this printed circuit board (PCB) is connect by stack is connected with core control panel.
6. according to the two remaining vehicle tyre pressure monitor and alarm system of the arbitrary described a kind of modularization of claim 1 to 5, it is characterized in that, adopt double-circuit connection mode between described alarm display unit and core controller, namely a road adopts CAN to connect, and another road adopts rigid line to connect.
7. the two remaining vehicle tyre pressure monitor and alarm system of a kind of modularization according to claim 6, it is characterized in that, alarm display unit comprises CAN transceiver, instrument, and alerting signal offers instrument by CAN or rigid line, instrument with acoustooptic form early warning to chaufeur.
8. the two remaining vehicle tyre pressure monitor and alarm system of a kind of modularization according to claim 6, it is characterized in that, alarm display unit comprises independently acousto-optic warning module, module comprises CAN interface and independently MCU, alarm display unit receives alerting signal by CAN or rigid line and passes to independently acousto-optic warning module, not only can show the early warning information of tire pressure monitoring system, can also receive and other CAN nodes send, need the information of sound and light alarm, display.
9. the two remaining vehicle tyre pressure monitor and alarm system of a kind of modularization according to claim 8, it is characterized in that, the information that described alarm display unit is sent for receiving core control panel, alarm display unit comprises display abnormal tyre pressure position module, learning state signal module and failure message alarm module.
10. a commercial vehicle/comm..vehicle, is characterized in that, adopts the two remaining vehicle tyre pressure monitor and alarm system of the arbitrary described modularization of the claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520108126.0U CN204451862U (en) | 2015-02-13 | 2015-02-13 | The two remaining vehicle tyre pressure monitor and alarm systems of modularization and this commercial vehicle/comm..vehicle |
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| CN201520108126.0U CN204451862U (en) | 2015-02-13 | 2015-02-13 | The two remaining vehicle tyre pressure monitor and alarm systems of modularization and this commercial vehicle/comm..vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105946473A (en) * | 2016-05-05 | 2016-09-21 | 郑州宇通客车股份有限公司 | Indirect type tire pressure monitoring method and device |
| CN109017800A (en) * | 2018-08-27 | 2018-12-18 | 汽解放汽车有限公司 | A kind of commercial vehicle vehicle speed processing device based on entire car controller |
-
2015
- 2015-02-13 CN CN201520108126.0U patent/CN204451862U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105946473A (en) * | 2016-05-05 | 2016-09-21 | 郑州宇通客车股份有限公司 | Indirect type tire pressure monitoring method and device |
| CN105946473B (en) * | 2016-05-05 | 2018-04-20 | 郑州宇通客车股份有限公司 | A kind of indirect type tire pressure monitoring method and apparatus |
| CN109017800A (en) * | 2018-08-27 | 2018-12-18 | 汽解放汽车有限公司 | A kind of commercial vehicle vehicle speed processing device based on entire car controller |
| CN109017800B (en) * | 2018-08-27 | 2024-03-19 | 一汽解放汽车有限公司 | Commercial vehicle speed processing device based on whole vehicle controller |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20180213 |