CN104709009A - Warning method adopting tire pressure sensors and warning system adopting tire pressure sensors - Google Patents
Warning method adopting tire pressure sensors and warning system adopting tire pressure sensors Download PDFInfo
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- CN104709009A CN104709009A CN201510085443.XA CN201510085443A CN104709009A CN 104709009 A CN104709009 A CN 104709009A CN 201510085443 A CN201510085443 A CN 201510085443A CN 104709009 A CN104709009 A CN 104709009A
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Abstract
A warning method adopting tire pressure sensors comprises the following steps: S1, arranging a first tire pressure sensor and a second tire pressure sensor; S2, measuring by using the first tire pressure sensor to obtain a first air pressure value, and measuring by using a second tire pressure sensor to obtain a second air pressure value; S3, monitoring a first air pressure value and a second air pressure value, and warning when a preset condition is reached. In the fault-warning method adopting tire pressure sensors, through the adoption of the double-detection manner, the realness of data detection can be further guaranteed; the possibility of the damage of both the tire pressure sensors is far lower than the possibility of the damage of only one tire pressure sensor; when both the tire pressure sensors normally display, the data of two air pressure sensors has higher credibility than that of only one tire pressure sensor; an alarm is given out in case that data of any one tire pressure sensor is abnormal, so that the incidence of abnormal situations is increased.
Description
Technical field
The present invention relates to tire pressure monitoring technical field, particularly relate to a kind of method for early warning and forewarn system of tyre pressure sensor.
Background technology
Tyre pressure sensor is mainly used in the pressure and temperature induction in automobile tyre pressure check system, after sensing the pressure size of inside tires gas and temperature height, sends data to the receptor on automobile, thus in car gauge panel read-out on show.
But, if tyre pressure sensor lost efficacy, caused abnormal tyre pressure not notify at once, or sent wrong report when tire pressure is normal, and all can affect traffic safety, and at present temporarily without the mount scheme realizing tyre pressure sensor self-discovery fault.
Summary of the invention
Based on this, be necessary that providing a kind of simply can realize the method that tyre pressure sensor finds fault automatically.
A kind of tyre pressure sensor method for early warning, comprising: S1, arranges the first tyre pressure sensor and second fetus pressure sensor; S2, utilizes described first tyre pressure sensor measurement to obtain the first atmospheric pressure value, utilizes the measurement of described second fetus pressure sensor to obtain the second atmospheric pressure value; S3, monitoring described first atmospheric pressure value and described second atmospheric pressure value, giving the alarm when reaching pre-conditioned.
Wherein in an embodiment, pre-conditionedly comprise first pre-conditioned, described step S3 is specially: S3c sets safety value; S3d, compares with safety value with described second atmospheric pressure value respectively by described first atmospheric pressure value, if described first atmospheric pressure value or described second atmospheric pressure value reach described first pre-conditioned time send the first alarm.
Wherein in an embodiment, first is pre-conditionedly: described first atmospheric pressure value or described second atmospheric pressure value are less than 80% of standard tire pressure or are greater than 120% of standard tire pressure.
Wherein in an embodiment, pre-conditionedly also comprise second pre-conditioned, also comprise before described step S3c: S3a, calculate the difference of described first atmospheric pressure value and described second atmospheric pressure value; S3b, detects described difference size, if described difference reach described second pre-conditioned time send the second alarm.
Wherein in an embodiment, second is pre-conditionedly: described difference is greater than 20% of standard tire pressure.
There is a need to provide a kind of and simply can realize the system that tyre pressure sensor finds fault automatically.
A kind of tyre pressure sensor forewarn system, is characterized in that, comprises the first tyre pressure sensor, second fetus pressure sensor, receptor, process module, display module; Described receptor receives the first atmospheric pressure value and the second atmospheric pressure value measured by described first tyre pressure sensor and described second fetus pressure sensor, described process module receives described first atmospheric pressure value and described second atmospheric pressure value, indicates described display module to give the alarm when reaching pre-conditioned.
Above-mentioned tyre pressure sensor fault early warning method, adopt double check, more can ensure the authenticity of Data Detection, the probability that the probability that two tire pressure detectors damage simultaneously damages than only tire pressure detector is far away little, when two tire pressure detectors show normal simultaneously, more have confidence level relative to the data of an only tire pressure detector, any one tire pressure detector data exception all gives the alarm, and increases the discovery probability of abnormal condition.
In addition, the self-fault discovery function that double check mechanism can realize tyre pressure sensor is further set, gives the alarm when the datum error reach of two tyre pressure sensors, and structural development need not be carried out in tyre pressure sensor, simply effectively.
Accompanying drawing explanation
Fig. 1 is tyre pressure sensor method for early warning diagram of circuit;
Fig. 2 is warning step figure in the first embodiment;
Fig. 3 is warning step figure in the second embodiment;
Fig. 4 is tyre pressure sensor transmitting data workflow diagram;
Fig. 5 is tyre pressure sensor forewarn system schematic diagram;
Fig. 6 is tyre pressure sensor structural representation in Fig. 5;
Fig. 7 is receiver architecture schematic diagram in Fig. 5.
Detailed description of the invention
For enabling object of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.Set forth a lot of detail in the following description so that fully understand the present invention.But the present invention can be much different from alternate manner described here to implement, those skilled in the art can when without prejudice to doing similar improvement when intension of the present invention, therefore the present invention is by the restriction of following public concrete enforcement.
See Fig. 1.The tyre pressure sensor method for early warning that the present invention proposes, comprises the following steps:
Step S1, arranges the first tyre pressure sensor and second fetus pressure sensor.
Tyre pressure sensor is arranged in tire, usual nation fixes on cranked tire valve, first tyre pressure sensor and second fetus pressure sensor can be fixed on the position of tire valve simultaneously, also can be fixed on other places in tire by the fastener nation added, only need guarantee two tyre pressure sensors can not come off because of centnifugal force when tire high speed rotating.
Step S2, utilizes the first tyre pressure sensor and second fetus pressure sensor to measure respectively and obtains the first atmospheric pressure value and the second atmospheric pressure value.
Tyre pressure sensor can respond to pressure size and the temperature height of tire internal gas, and the analog signal detected is converted to digital signal, useful data are acquired through built-in MCU process, data flow is formed by certain way coding, convert radiofrequency signal to by built-in rf processor again, finally realize wireless transmission in the mode of 314MHz or 434MHz frequency modulation or amplitude modulation by radiofrequency launcher.
Step S3, detects the first atmospheric pressure value and the second atmospheric pressure value, gives the alarm when reaching pre-conditioned.
First set a safety value scope for tire internal gas pressure value, when any one value in the first atmospheric pressure value detected and the second atmospheric pressure value exceeds safety value scope, namely give the alarm, the abnormal inspection that needs repairing of alert state.
Above tyre pressure sensor method for early warning, utilizes the common early warning of multiple tyre pressure sensor, more can do sth. in advance unusual circumstance, ensure driver drives vehicle safety than the single tyre pressure sensor of use.
See Fig. 2.Particularly, step S3 comprises the following steps:
S3c, setting safety value.
Safety value is the safety value of tire internal gas pressure, and safety value can be arranged with reference to tire standards tire pressure, wherein the mark tire pressure value of tire standards tire pressure use to by known appointment vehicle tire.Safety value can arrange and equal standard tire pressure value.
S3d, compares with safety value with the second atmospheric pressure value respectively by the first atmospheric pressure value, if the first atmospheric pressure value or the second atmospheric pressure value reach first pre-conditioned time send the first alarm.
If the air pressure that occurring leaks gas causes reduces, or the excessive air pressure caused of load-carrying is excessive, the atmospheric pressure value in tire all can change.First atmospheric pressure value and the second atmospheric pressure value all characterize the atmospheric pressure value of same tire, when there being the numerical value of one to occur abnormal in two atmospheric pressure values detected, namely send the first alarm, prompting abnormality in tire air-pressure.
Because inside tires actual pressure is subject to the impact of the factor such as surface conditions, actual measurement weight (AMW), therefore set after safety value, safe range should be in the reasonable left and right fluctuation range centered by safety value, such as can be set to: the value of detection tire pressure is less than safety value 15% or is safe range more than safety value 15%, and tire pressure detected value can not alert trigger in this scope.
In this embodiment, first is pre-conditionedly less than 80% of standard tire pressure for detecting atmospheric pressure value numerical value or is greater than 120% of standard tire pressure.First pre-conditionedly can adjust according to actual needs.
In another embodiment, may occur that two tyre pressure sensors there will be the situation of the single normal work of single fault.In this situation, then need to carry out early warning to the fault of tyre pressure sensor.
Particularly, see Fig. 3.Before step S3c, also carry out following steps:
S3a, calculates the difference of the first atmospheric pressure value and the second atmospheric pressure value.
The first atmospheric pressure value detected and the second atmospheric pressure value do difference, and take absolute value, and record this difference.
S3b, detects difference size, if difference reach second pre-conditioned time send the second alarm.
Difference represents the detection data phase margin of two tyre pressure sensors, and because installation site is different in reality, or the air pressure acquisition time is different, and the actual pressure value that two tyre pressure sensors can be caused to detect can difference to some extent.When undulating quantity is greater than some scopes, then may there is another situation about still normally working of one of them tyre pressure sensor et out of order.In the process owing to cannot know which tyre pressure sensor produces fault, therefore also cannot know the actual pressure value in tire, also need thus to overhaul.Therefore, when the difference of two tyre pressure sensors reaches default second condition, namely sending the second alarm sounds tyre pressure sensor may et out of order.
In the present embodiment, second is pre-conditionedly: difference is greater than 20% of standard tire pressure.In addition, second pre-conditionedly also can to adjust according to actual conditions.
The self-fault discovery function of tyre pressure sensor can be realized by arranging double check mechanism further, giving the alarm when the datum error reach of two tyre pressure sensors, and structural development need not be carried out in tyre pressure sensor, simply effectively
See Fig. 4.In one embodiment, the wireless transmission mode of tyre pressure sensor is that interval is launched, and its workflow is as follows:
S2a, detects temperature value and atmospheric pressure value in tire;
S2b, judges temperature value and atmospheric pressure value whether within the scope of safety value; In this way, then next step is performed; As no, then send data immediately;
S3c, judges whether to reach time gap, in this way, then sends data immediately; As no, then wait for.
The MCU of tyre pressure sensor possesses data analysis function, sets tire pressure temperature and air pressure safe range value in advance in MCU, and MCU can judge that the data measured are whether in safety value.Tyre pressure sensor not timing detects data in tire, and under tire safety travels, tire pressure data are within the scope of safety value, and tyre pressure sensor is wireless transmission data regularly; And when tire occurs abnormal, tire pressure data exceed safety value scope, and tyre pressure sensor also outwards sends data immediately.
This kind of emission mode effectively can save the work electricity of tyre pressure sensor, increases flying power, take into account fault and alarm simultaneously.
When data transmission is to driving system, first system judges received Data Source.Each tyre pressure sensor is equipped with an exclusive ID, and supporting all tyre pressure sensor ID are all recorded in system, if the signal received is non-from recorded ID, system does not then analyze data; After resolution data, judge that whether data are abnormal, then start corresponding alerting signal if abnormal.
Fixing ID is arranged, and can avoid the data interference being subject to the transmission of other tyre pressure sensors, increase antijamming capability.
See Fig. 5.The present invention also proposes the tyre pressure sensor forewarn system implementing above method for early warning, comprising:
First tyre pressure sensor 100, second fetus pressure sensor 200, receptor 300, process module 400 and display module 500.
First tyre pressure sensor 100 and second fetus pressure sensor 200 are installed in motor tire, are arranged on valve simultaneously.First tyre pressure sensor 100 and second fetus pressure sensor 200 all have the functions such as temperature, pressure data process and wireless transmission.Because the first tyre pressure sensor 100 is identical with second fetus pressure sensor 200 structure, therefore the structure of the first tyre pressure sensor 100 is only described at this, the architectural feature of two tyre pressure sensors can be described simultaneously.
Particularly, see Fig. 6.Radio transmitter, MCU (miniature control processor) and pressure-temperature sensor is provided with in first tyre pressure sensor 100, wherein pressure-temperature sensor responds to pressure size and the temperature height of tire internal gas, and be converted to digital signal detecting the analog signal obtained, useful data are acquired through built-in MCU process, data flow is formed by certain way coding, convert radiofrequency signal to by built-in radio transmitter again, finally realize wireless transmission in the mode of 314MHz or 434MHz frequency modulation or amplitude modulation by radiofrequency launcher.
See Fig. 7.Whole receiving end comprises receptor 300, process module 400 and display module 500.Wherein receptor 300 is for receiving the data of the first tyre pressure sensor 100 and second fetus pressure sensor 200 wireless transmission.Receptor 300 is connected with process module 400, and process module 400 is connected with read-out.
Process module 400 performs data processing to two groups of detected values, specifically comprises data transformations, numeric ratio to process such as, quantity difference calculating.Process module 400 connects module 500, and display module 500 is for showing data, and when process module 400 finds data exception, instruction display module 500 shows warning information.
During real work, first tyre pressure sensor 100 is measured respectively with second fetus pressure sensor 200 and is obtained the first atmospheric pressure value and the second atmospheric pressure value, be wirelessly transmitted on receptor 300, receptor 300 transfers in process module 400, two groups of early-warning conditions are preset in process module 400, first pre-conditioned and second pre-conditioned respectively, first is pre-conditioned for judging that whether tire pressure is abnormal, safety value scope is inputted in advance in processing module 400, when the data that the first tyre pressure sensor 100 or second fetus pressure sensor 200 detect exceed safety value scope, process module 400 indicates display module 500 to send the first early warning signal, second is pre-conditioned for judging tyre pressure sensor whether fault, and the data difference detected when two tyre pressure sensors is comparatively large, and namely instruction display module 500 sends the second early warning signal, and instruction tyre pressure sensor breaks down.Pre-conditioned value can be changed as required to adapt to varying environment in practical application.
The data of tyre pressure sensor are emitted as interval and launch, and workflow is set as follows:
Record the time gap that data are launched in the MCU of sensor, and pressure, temperature sensor continue to detect data, not dig is transported in MCU.MCU tentatively judge normal after, rerun time interval judges, only has the time gap reaching setting apart from last wireless transmission just to send this group data to receptor 300; If tentatively judge data exception, then send these group data directly to receptor 300 and without the need to etc. time gap to be achieved.
When receiving, the first tyre pressure sensor 100 all has fixing ID with second fetus pressure sensor 200, and receptor 300 only processes the data of these two tyre pressure sensor transmission, shields the data that other receive.Process module 400 judges whether the two groups of data received reach default early-warning conditions, reach, send corresponding alarm, otherwise normal display data.
In the present embodiment, display module 500 on only show one group of data, chaufeur can manual switching display data group; In other embodiments, also can show two groups of data simultaneously.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (6)
1. a tyre pressure sensor method for early warning, comprising:
S1, arranges the first tyre pressure sensor and second fetus pressure sensor;
S2, utilizes described first tyre pressure sensor measurement to obtain the first atmospheric pressure value, utilizes the measurement of described second fetus pressure sensor to obtain the second atmospheric pressure value;
S3, monitoring described first atmospheric pressure value and described second atmospheric pressure value, giving the alarm when reaching pre-conditioned.
2. tyre pressure sensor method for early warning according to claim 1, is characterized in that, describedly pre-conditionedly comprises first pre-conditioned, and described step S3 is specially:
S3c sets safety value;
S3d, compares with safety value with described second atmospheric pressure value respectively by described first atmospheric pressure value, if described first atmospheric pressure value or described second atmospheric pressure value reach described first pre-conditioned time send the first alarm.
3. according to the tyre pressure sensor method for early warning where required described in 2, it is characterized in that, described first is pre-conditionedly:
Described first atmospheric pressure value or described second atmospheric pressure value are less than 80% of standard tire pressure or are greater than 120% of standard tire pressure.
4. the tyre pressure sensor method for early warning according to Claims 2 or 3, is characterized in that, describedly pre-conditionedly also comprises second pre-conditioned, also comprises before described step S3c:
S3a, calculates the difference of described first atmospheric pressure value and described second atmospheric pressure value;
S3b, detects described difference size, if described difference reach described second pre-conditioned time send the second alarm.
5. tyre pressure sensor method for early warning according to claim 4, is characterized in that, described second is pre-conditionedly: described difference is greater than 20% of standard tire pressure.
6. a tyre pressure sensor forewarn system, is characterized in that, comprises the first tyre pressure sensor, second fetus pressure sensor, receptor, process module, display module;
Described receptor receives the first atmospheric pressure value and the second atmospheric pressure value measured by described first tyre pressure sensor and described second fetus pressure sensor, described process module receives described first atmospheric pressure value and described second atmospheric pressure value, indicates described display module to give the alarm when reaching pre-conditioned.
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| CN201510085443.XA CN104709009B (en) | 2015-02-15 | 2015-02-15 | Tyre pressure sensor method for early warning and system |
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| CN114475103A (en) * | 2022-03-28 | 2022-05-13 | 深圳富士伟业科技有限公司 | Tire pressure monitoring system fault judgment method |
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Effective date of registration: 20230918 Address after: 510000 Guangdong city of Guangzhou province Luogang District Science City Nanxiang Road No. 10 two Patentee after: GUANGDONG FENGHUA SEMICONDUCTOR TECHNOLOGY Co.,Ltd. Address before: 510000 Guangdong city of Guangzhou province Luogang District Science City Nanxiang Road No. 10 two Patentee before: GUANGDONG FENGHUA SEMICONDUCTOR TECHNOLOGY Co.,Ltd. Patentee before: Guangdong Fenghua Advanced Technology Holding Co.,Ltd. |