CN105667228A - Semitrailer TPMS signal control method - Google Patents
Semitrailer TPMS signal control method Download PDFInfo
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- CN105667228A CN105667228A CN201610005798.8A CN201610005798A CN105667228A CN 105667228 A CN105667228 A CN 105667228A CN 201610005798 A CN201610005798 A CN 201610005798A CN 105667228 A CN105667228 A CN 105667228A
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- sensor
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- pressure
- identification code
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/0422—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver characterised by the type of signal transmission means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention belongs to the technical field of automobile safety and particularly relates to a semitrailer TPMS signal control method. The method includes the following steps that a system is initialized, after being connected with sensors on all tires, a controller waits for receiving data sent by all the sensors; the pressure and temperature data of the tires are acquired and stored through the sensors; if the data sent last time are stored in the sensors, the data are compressed and then sent to the controller; and if the data sent last time are not stored in the sensors, the sensors directly send the data to the controller. The pressure difference values and the temperature difference values are calculated, if the difference values are quite small, identifiers are directly transmitted, the values obtained last time are continuously used in the controller, the length of the identifiers is quite smaller than that of the pressure and temperature data, and therefore the amount of the transmitted data can be greatly compressed, and the occupation time of a channel is shortened; and similarly the time spent by the controller in receiving the data sent by all the sensors is shortened.
Description
Technical field
The invention belongs to technical field of vehicle safety, particularly to a kind of semitrailer TPMS system signal control method.
Background technology
Heavy-load automobile is mainly used in haul goods, it is extremely important for the monitoring, alarming of tire pressure, now for the monitoring of tire pressure, adopt TPMS system more, including a controller and the sensor being arranged on each wheel, the Frame that the information such as the ID identification code of product self and the tire pressure collected, temperature are combined as up to 11 bytes is wirelessly transmitted to controller by sensor, by the identification to ID code when monitoring control devices is to tire pressure or temperature anomaly, confirms tire location and carry out reporting to the police or other process. For preventing the issuable information transmission errors of air interference and alarm signal from losing, the Frame of sensor will be repeated quickly and easily as many times as required transmission.
For heavy-load automobile, its tire is a lot, particularly trailer, trailer has at least two axles, many also five axles, every axle has four wheels, the tire number of trailer itself is at 8 to 20, and so many wheels can send substantial amounts of serial data to controller, so will result in following problem: one, the transmission of mass data string very easily produces comparatively serious co-channel interference, causes tire pressure loss of data; Its two, controller received the information that the sensor on all tire sends required for time longer, thus make controller not prompt enough for the monitoring of tire pressure, if not uploading in time when tire pressure or temperature occur abnormal is danger close.
Summary of the invention
It is an object of the invention to provide a kind of semitrailer TPMS system signal control method, it is possible to the data that transmission sensor acquisition promptly and accurately arrives.
For realizing object above, the technical solution used in the present invention is: a kind of semitrailer TPMS system signal control method, comprise the steps: (A) system initialization, the data that send of each sensor to be received such as controller is set up with the sensor on each tire after being connected; (B) pressure of sensor acquisition tire, temperature data store; (C) if storage has the data sent last time in sensor, next step is entered;Otherwise, the pressure collected, temperature data and ID identification code are sent to controller by sensor; (D) pressure collected, temperature data and last time were sent by sensor pressure, temperature data compare calculating pressure difference value and temperature gap, if pressure difference value and temperature gap are all higher than setting threshold value, the pressure collected, temperature data and ID identification code are sent to controller by sensor; If pressure difference value and temperature gap have one or be respectively less than equal to setting threshold value, sensor is resent to controller after being replaced by corresponding data identifier.
Compared with prior art, there is techniques below effect in the present invention: by calculating pressure difference value and temperature gap, if difference is only small, then directly transmitting identifier, continue to use numerical value last time in controller, identifier is compared with pressure, temperature data, length is little a lot, so can greatly reduce the data volume of transmission, reduce Channel holding time, equally also just reduce controller and received all the sensors and send the time of data.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail.
A kind of semitrailer TPMS system signal control method, comprises the steps: (A) system initialization, the data that each sensor to be received sends after being connected with the sensor foundation on each tire by controller etc.; (B) pressure of sensor acquisition tire, temperature data store; (C) if storage has the data sent last time in sensor, next step is entered; Otherwise, the pressure collected, temperature data and ID identification code are sent to controller by sensor; (D) pressure collected, temperature data and last time were sent by sensor pressure, temperature data compare calculating pressure difference value and temperature gap, if pressure difference value and temperature gap are all higher than setting threshold value, the pressure collected, temperature data and ID identification code are sent to controller by sensor; If pressure difference value and temperature gap have one or be respectively less than equal to setting threshold value, sensor is resent to controller after being replaced by corresponding data identifier. Sensor is compressed after the data collected are compared processing, when data difference is less of time, only transmitting identifier, controller continues after receiving identifier to continue to use the data received last time over there, in this manner it is possible to greatly reduce the data length of transmission. Controller be received entirely the data that all the sensors sends needed for time be greatly reduced, also ensure that the data that sensor sends again can be sent to controller in time.
Specifically, in described step D, if pressure difference value is less than or equal to setting threshold value and temperature gap more than setting threshold value, identifier, the temperature data collected and ID identification code are sent to controller by sensor; If pressure difference value is more than setting threshold value and temperature gap less than or equal to setting threshold value, the pressure data collected, identifier and ID identification code are sent to controller by sensor; If pressure difference value, temperature gap are respectively less than equal to setting threshold value, identifier, identifier and ID identification code are sent to controller by sensor. Here, by each transmission data are compared, by that bigger for wherein difference data transmission, the data identifier that difference is little replaces, both ensure that and can transmit timely time data change, and ensured again time data variation is little, to reduce transmission data length.
Each wheel detector generally has an independent ID identification code, the ID identification code of each wheel is different, exactly because also the ID identification code of sensor is different on each wheel, causes that ID identification code is general all long, such as commonly 32bit, this adds the conveying length of data undoubtedly.In the present embodiment preferably, in described each sensor, storage has position of wheel code, and on same vehicle, the position of wheel code of all tire is different; In controller, storage has the position of wheel code that each sensor is corresponding, and in described step C and step D, the ID identification code position of wheel code that sensor sends replaces; The data length of described position of wheel code is less than ID identification code data length. The length of position of wheel code is only small, as long as distinguishing each tire on vehicle, equally, in order to avoid two cars produces interference when too near because position of wheel code is identical, position of wheel code again can not be too short, and in the present embodiment, the data length of position of wheel code is 5bit.
Preferably due to working sensor uses battery, its information about power is also critically important, in each step, sensor acquisition, transmission data also include electric quantity data. The data of monitoring required for it according to the needs of user, can be acquired, only list tire pressure, temperature, electric quantity data in the present invention by this, other data it is also possible that.
Specifically, in described step A, system initializes in accordance with the following steps: (A1) reads ID identification code and the installation site thereof of each tire by matching tool; (A2) it is each tire one position of wheel code of distribution on matching tool, and position of wheel code is written in the memory space of respective sensor; (A3) installation site of sensor, ID identification code and position of wheel code are written in the memory space of controller by matching tool. Owing to being employed herein position of wheel code, general sensor is not there is position of wheel code, thus require over matching tool to read, matching tool is exactly one and is specifically designed to acquisition tire sensor ID identification code or to a kind of instrument of write information in sensor, prior art has a lot, here its structure is just no longer described in detail.
Illustrate with common data length below: described pressure, temperature, electric quantity data length be 5bit, the length of identifier is 1bit. The data length of described ID identification code is 32bit, and position of wheel code only has 5bit. A usual data bag comprises 4 frame × 11 bytes and amounts to 352bit, and 4 frame × 3 bytes after compression amount to 96bit, and Channel holding time is reduced to ten Milliseconds by hundred original Milliseconds, and the raising of transmission promptness is very significant by it.
Claims (7)
1. a semitrailer TPMS system signal control method, comprises the steps:
(A) system initialization, the data that send of each sensor to be received such as sets up after being connected by controller with the sensor on each tire;
(B) pressure of sensor acquisition tire, temperature data store;
(C) if storage has the data sent last time in sensor, next step is entered; Otherwise, the pressure collected, temperature data and ID identification code are sent to controller by sensor;
(D) pressure collected, temperature data and last time were sent by sensor pressure, temperature data compare calculating pressure difference value and temperature gap, if pressure difference value and temperature gap are all higher than setting threshold value, the pressure collected, temperature data and ID identification code are sent to controller by sensor; If pressure difference value and temperature gap have one or be respectively less than equal to setting threshold value, sensor is resent to controller after being replaced by corresponding data identifier.
2. semitrailer TPMS system signal control method as claimed in claim 1, it is characterised in that: in described step D,
If pressure difference value is less than or equal to setting threshold value and temperature gap more than setting threshold value, identifier, the temperature data collected and ID identification code are sent to controller by sensor;
If pressure difference value is more than setting threshold value and temperature gap less than or equal to setting threshold value, the pressure data collected, identifier and ID identification code are sent to controller by sensor;
If pressure difference value, temperature gap are respectively less than equal to setting threshold value, identifier, identifier and ID identification code are sent to controller by sensor.
3. semitrailer TPMS system signal control method as claimed in claim 1 or 2, it is characterised in that: in described each sensor, storage has position of wheel code, and on same vehicle, the position of wheel code of all tire is different; In controller, storage has the position of wheel code that each sensor is corresponding, and in described step C and step D, the ID identification code position of wheel code that sensor sends replaces; The data length of described position of wheel code is less than ID identification code data length.
4. semitrailer TPMS system signal control method as claimed in claim 3, it is characterised in that: in each step, sensor acquisition, transmission data also include electric quantity data.
5. semitrailer TPMS system signal control method as claimed in claim 4, it is characterised in that: in described step A, system initializes in accordance with the following steps:
(A1) ID identification code and the installation site thereof of each tire is read by matching tool;
(A2) it is each tire one position of wheel code of distribution on matching tool, and position of wheel code is written in the memory space of respective sensor;
(A3) installation site of sensor, ID identification code and position of wheel code are written in the memory space of controller by matching tool.
6. the semitrailer TPMS system signal control method as described in claim 4 or 5, it is characterised in that: described pressure, temperature, electric quantity data length be 5bit, the length of identifier is 1bit.
7. semitrailer TPMS system signal control method as claimed in claim 5, it is characterised in that: the data length of described ID identification code is 32bit, and the data length of position of wheel code is 5bit.
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| CN201610005798.8A CN105667228B (en) | 2016-01-04 | 2016-01-04 | Semitrailer TPMS system signal control method |
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| CN201610005798.8A CN105667228B (en) | 2016-01-04 | 2016-01-04 | Semitrailer TPMS system signal control method |
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| CN105667228A true CN105667228A (en) | 2016-06-15 |
| CN105667228B CN105667228B (en) | 2019-11-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107539041A (en) * | 2016-06-29 | 2018-01-05 | 长城汽车股份有限公司 | The data transmission method and system of tyre pressure sensor |
| CN107825922A (en) * | 2017-12-07 | 2018-03-23 | 深圳市道通科技股份有限公司 | Acquisition methods, information receiving device and the tyre monitoring apparatus of tire-state information |
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| EP1285786A2 (en) * | 2001-08-22 | 2003-02-26 | Sumitomo Rubber Industries Limited | Method and apparatus for detecting abnormalities of tire, and program for detecting abnormalities of tire |
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| US5886624A (en) * | 1991-08-08 | 1999-03-23 | Compagnie General Des Etablissements Michelin-Michelin & Cie | Method for processing pressure and temperature measurements in a tire monitoring system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107539041A (en) * | 2016-06-29 | 2018-01-05 | 长城汽车股份有限公司 | The data transmission method and system of tyre pressure sensor |
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| CN107825922A (en) * | 2017-12-07 | 2018-03-23 | 深圳市道通科技股份有限公司 | Acquisition methods, information receiving device and the tyre monitoring apparatus of tire-state information |
| CN107825922B (en) * | 2017-12-07 | 2020-04-28 | 深圳市道通科技股份有限公司 | Method for acquiring tire condition information, information receiving apparatus, and tire monitoring apparatus |
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| CN105667228B (en) | 2019-11-08 |
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Address after: 230601 No. 27, Taoyuan Road, Hefei economic and Technological Development Zone, Anhui, China Applicant after: Hefei hi tech automotive electronic Limited by Share Ltd Address before: 230601 No. 27, Taoyuan Road, Hefei economic and Technological Development Zone, Anhui, China Applicant before: Hefei Softec Auto-Electronic Co., Ltd. |
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