CN103754073A - Method and device for testing communication reliability of tire pressure monitoring system - Google Patents
Method and device for testing communication reliability of tire pressure monitoring system Download PDFInfo
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Abstract
The invention relates to a method and a device for testing the communication reliability of a tire pressure monitoring system. The method comprises the following steps: sending testing data through triggering emitters corresponding to all tires; receiving testing data sent by all emitters by a receiver, forwarding the received testing data to a central processing unit; and determining the communication reliability of each emitter and the receiver by the central processing unit according to the received testing data. Compared with the prior art, the method for testing the communication reliability of the tire pressure monitoring system, provided by the invention, is high in testing efficiency, simple in operation and high in automation degree, and can be applied to the standing test of earlier-stage communication reliability of a tire pressure monitoring system product, the test of the communication reliability of the development stage, the detection of the communication reliability of the production stage, and the detection of the communication reliability of the client verification stage.
Description
Technical field
The present invention relates to tire pressure monitoring system technical field, be specifically related to communication reliability test method and the device of tire pressure monitoring system.
Background technology
Tire pressure monitoring system (TPMS, Tyre Pressure Monitoring System) be the system that a kind of pressure to vehicle tyre, temperature, voltage etc. carry out Real-Time Monitoring, facilitate chaufeur to understand in real time the pressure of each tire, temperature etc., at tire, occur when abnormal, can be resolved in time, reduce and cause traffic accident because of blow out, gas leakage etc.
The communication reliability of tire pressure monitoring system is very important performance figure of tire pressure monitoring system.Early stage, development phase, production phase, customer authentication stage at tire pressure monitoring system product all need the communication reliability of tire pressure monitoring system to test.Tire pressure monitoring system communication reliability of the prior art carries out test method and is mainly: by projector, normally send tire pressure, receptor receives tire pressure and adds up the information reception condition in certain hour, by the read-out output display statistics of tire pressure monitoring system.In the test mode of prior art, due to projector, normally to send the tire pressure time cycle long, thus need long period time just can obtain test result, and test result inaccuracy.In addition, each position of wheel projector is when different operating state, test result is inaccurate, if the tire in a certain position of wheel is when the low pressure alarming state, the corresponding projector of this tire sends the frequency of the tire pressure frequency projector transmission tire pressure corresponding far above other normal condition tires, thereby receptor receives the projector corresponding data of alarm condition far more than the projector corresponding data of other normal conditions, projector corresponding to tire in low pressure alarming state causes interference to the projector test that other tires in normal working are corresponding.
Summary of the invention
The object of the invention is to overcome shortcomings and deficiencies of the prior art, a kind of communication reliability test method of tire pressure monitoring system of high efficiency test is provided.
Object of the present invention is achieved through the following technical solutions:
The communication reliability test method of tire pressure monitoring system, comprises the following steps:
Trigger the projector that each tire is corresponding and send test data;
Receptor receives the test data that each projector sends, and received test data is forwarded to central processing unit;
Central processing unit judges the communication reliability of each projector and receptor according to received test data.
As preferably, described central processing unit is specially according to the step of the communication reliability of the each projector of received test data and receptor: central processing unit is calculated the frame loss rate of each projector according to the test data of received test data and projector transmitting.
As preferably, described receptor also detects the signal strength of test data, and being forwarded to central processing unit by detecting signal strength corresponding to data, described central processing unit calculates according to signal strength corresponding to test data magnitude of power corresponding to test data receiving.
As preferably, the projector that each tire is corresponding also sends the id information that projector is corresponding when sending test data, receptor transfers to central processing unit by received test data and id information, and central processing unit is calculated projector that each ID is corresponding and the communication reliability of receptor.
As preferably, also comprise the step that judged result is carried out to the step of output display and judged result is stored respectively answer the step of communication reliability of projector and receptor according to received test data judgement in described central processing unit after.
As preferably, the step that the projector that the each tire of described triggering is corresponding sends test data is specially: central processing unit controls binary pair triggers successively the projector that each tire is corresponding and send respectively test data under different stationary wheel parallactic angle degree, difference are travelled speed state.
As preferably, the described step that judged result is exported is specially: by the position of wheel information of each projector and under different stationary wheel parallactic angle degree, difference are travelled speed state respectively corresponding frame loss rate and magnitude of power carry out output display; The described step that judged result is stored is specially: by the position of wheel information of each projector and under the state of different stationary wheel parallactic angle degree, different moving velocitys, store respectively after the frame loss rate of correspondence, magnitude of power association.
Another object of the present invention is to provide a kind of device of the communication reliability test method that realizes above-mentioned tire pressure monitoring system.
Binary pair, triggers successively the projector that each tire is corresponding and sends test data;
Projector, sends test data according to the triggering of binary pair;
Receptor, receives the test data that each projector sends, and received test data is forwarded to central processing unit;
Central processing unit, judges the communication reliability of the corresponding projector of each tire and receptor according to received test data.
As preferably, described receptor also detects the signal strength of test data, and being forwarded to central processing unit by detecting signal strength corresponding to data, described central processing unit calculates according to signal strength corresponding to test data magnitude of power corresponding to test data receiving.
As preferably, described projector sends test data and corresponding id information thereof according to the triggering of binary pair, described receptor receives test data and the corresponding id information thereof that each projector sends, and received test data and id information are forwarded to central processing unit, central processing unit is calculated projector that each ID is corresponding and the communication reliability of receptor.
As preferably, the reliable communications system safety testing device of described tire pressure monitoring system also comprises for corresponding each tire projector is carried out to the display unit of output display and the memory cell for the communication reliability of corresponding each tire projector and receptor is stored with the communication reliability of receptor.
As preferably, described binary pair receives the trigger request instruction of central processing unit, and produces triggering command and trigger corresponding projector.
The present invention comprises following advantage and beneficial effect compared to existing technology:
(1) by triggering the projector that each tire is corresponding, send test data; Receptor receives the test data that each projector sends, and received test data is forwarded to central processing unit; Central processing unit judges the communication reliability of each projector and receptor according to received test data, compared with prior art, the communication reliability test method testing efficiency of tire pressure monitoring system provided by the invention is high, simple to operate, degree of automation is high.
(2) projector that each tire is corresponding also sends the id information that projector is corresponding when sending test data, receptor transfers to central processing unit by received test data and id information, central processing unit is calculated projector that each ID is corresponding and the communication reliability of receptor, central processing unit can be calculated according to id information the communication reliability of projector corresponding to each position of wheel, embody the communication reliability of projector and the relation in position of wheel, make test more comprehensive.
(3) the communication reliability test method of tire pressure monitoring system provided by the invention only needs can complete for 3 minutes-5 minutes the test of a communication reliability, can greatly save the human resources that test duration and test drop into while being applied to batch testing, cost-saving.
(4) by test emitter at different stationary wheel parallactic angle degree, the difference communication reliability under speed state that travels, test parameter is comprehensive, test result is accurate.
(5) test of communication reliability assessment test in early stage, the communication reliability of development phase, the communication reliability of production phase that the communication reliability test method of tire pressure monitoring system provided by the invention and device can be applicable to tire pressure monitoring system product detects, the communication reliability detection in customer authentication stage etc., application is wide, has considerable application prospect.
Accompanying drawing explanation
Fig. 1 is the diagram of circuit of the communication reliability test method of tire pressure monitoring system in embodiment;
Fig. 2 is the distribution graph of the reliable communications system safety testing device of tire pressure monitoring system;
Fig. 3 is the reliable communications system safety testing device functional block diagram of tire pressure monitoring system.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, the communication reliability test method of tire pressure monitoring system, comprises the following steps:
S1. binary pair triggers successively the projector that each tire is corresponding and under different stationary wheel parallactic angle degree, difference are travelled speed state, sends respectively test data and corresponding id information thereof.Described test data is predefined fc-specific test FC sequence number, if projector is take 1 second as cycle transmission 1-255 cyclic sequence number.The step of described projector transmission test data is specially after associated id information corresponding with this projector test data and sends.
S2. receptor receives test data and the corresponding id information thereof that each projector sends, and detects the signal strength of test data; Id information corresponding to received test data, the test data that receives and signal strength corresponding to test data receiving are forwarded to central processing unit.
S3. central processing unit is calculated the frame loss rate of the projector that each ID is corresponding one by one according to received test data and corresponding id information thereof, calculates one by one the received power value of the test data that each ID is corresponding according to the id information of the signal strength of received test data and correspondence thereof.The detailed process of calculating the frame loss rate of the transmitting that a certain id information is corresponding is the number of calculating the test data that this id information of receiving in certain hour section is corresponding, and the ratio of the test data sum of the number of calculating the test data that this id information of receiving in this time period the is corresponding projector transmission corresponding with this ID in this time period, obtain the frame loss rate of the projector that this ID is corresponding.Described received power value comprises minimal detectable power value, maximal received power value and mean receiving power value.The received power value of frame losing number that in actual applications can be by projector and corresponding test data thereof is as the reference of communication reliability that judges projector and receptor.
S4. the communication reliability of each projector and receptor is stored.Be specially by the position of wheel information of each projector and under the state of different stationary wheel parallactic angle degree, different moving velocitys and after the frame loss rate of correspondence, received power value association, store respectively.
S5. the communication reliability of each projector and receptor is carried out to output display.Be specially by the position of wheel information of each projector and under different stationary wheel parallactic angle degree, difference are travelled speed state respectively corresponding frame loss rate and magnitude of power carry out output display.The corresponding parameter of output display according to actual needs when practical application.
The communication reliability test method of above-mentioned tire pressure monitoring system can test out the communication reliability of projector and receptor in system for detecting tire pressure fast, effectively, all sidedly.The sights such as communication reliability assessment test in early stage, the test of the communication reliability of development phase, the communication reliability of production phase that this method can be applicable to tire pressure monitoring system product detects, the communication reliability detection in customer authentication stage.
As shown in Figure 2,3, a kind of system of the communication reliability test method that realizes above-mentioned tire pressure monitoring system, comprising: binary pair, projector, receptor, conv, central processing unit, memory cell and display unit.Described projector and receptor are respectively projector and the receptor of tire pressure monitoring system.
Described binary pair carries out signal with central processing unit by serial mode and is connected, described binary pair triggers projector by low frequency triggering mode, described projector is connected with receptor by RF-wise, and described receptor is connected with central processing unit by conv.
Described binary pair is for receiving the trigger request instruction of central processing unit, and produces triggering command and trigger corresponding projector.
Described projector sends test data and corresponding id information thereof according to the triggering command of binary pair.
Described receptor receives test data and the corresponding id information thereof that each projector sends, and detects the signal strength of test data; Id information corresponding to received test data, the test data that receives and signal strength corresponding to test data receiving are forwarded to central processing unit.
Described central processing unit is used for sending trigger request instruction to binary pair; According to the id information of received test data and correspondence thereof, calculate one by one the frame loss rate of the projector that each ID is corresponding; According to the id information of the signal strength of received test data and correspondence thereof, calculate one by one the received power value of the test data that each ID is corresponding.The detailed process of calculating the frame loss rate of the transmitting that a certain id information is corresponding is: the number of calculating the test data that in certain hour section, this id information is corresponding, and the ratio of the number of the test data of the number of calculating the test data that this id information is corresponding in this time period projector transmission corresponding with this ID in this time period, obtain the frame loss rate of the projector that this ID is corresponding.Described received power value comprises minimal detectable power value, maximal received power value and mean receiving power value.The received power value of frame losing number that in actual applications can be by projector and corresponding test data thereof is as the reference of communication reliability that judges projector and receptor.
Described memory cell is for storing the communication reliability of corresponding each tire projector and receptor.
Described display unit is for carrying out output display by the communication reliability of corresponding each tire projector and receptor.
Described conv is for being converted to the RS232 interface unified with central processing unit by the CAN bus output of receptor.
Above-mentioned binary pair is low-frequency trigger, and central processing unit is PC.
The working process of the reliable communications system safety testing device of above-mentioned tire pressure monitoring system is as follows:
In central processing unit, order, trigger rate and the test data that binary pair triggers each projector is set in advance, the information such as stationary wheel parallactic angle degree (being the angle of projector), moving velocity are set simultaneously.For same projector, multiple stationary wheel parallactic angle degree and multiple moving velocity can be set in central processing unit, realize the communication reliability under the multimode of testing same projector.As binary pair is set, and to trigger the order of projector be the near front wheel → off front wheel → left rear wheel → off hind wheel, the triggering cycle is 1 second, the cyclic sequence number that test data is 1-255.Described central processing unit is connected with flop signal, described central processing unit is connected by serial ports with binary pair in the present embodiment, when described central processing unit sends trigger request instruction successively to binary pair, binary pair produces corresponding triggering command according to received trigger request instruction and triggers corresponding projector.The projector being triggered sends default test data and corresponding id information thereof.Receptor receives test data and the corresponding id information thereof that each projector sends, and detects the signal strength of test data; Id information corresponding to received test data, the test data that receives and signal strength corresponding to test data receiving are forwarded to central processing unit.Projector emissive power corresponding to each position of wheel is identical, but the signal transmission path between each projector and receptor is different, therefore signal is in the decay difference of each transmission path, signal strength corresponding to test data that each projector that receptor receives sends is also different.The step of the signal strength of described detection test data is specially receptor by magnitude of voltage corresponding to signal strength acquisition interface collecting test data.Central processing unit is calculated the frame loss rate of the projector that each ID is corresponding one by one according to received test data and corresponding id information thereof; According to the id information of the signal strength of received test data (the corresponding magnitude of voltage of test data) and correspondence thereof, calculate one by one the received power value of the test data that each ID is corresponding.Described received power value comprises minimal detectable power value, maximal received power value and mean receiving power value.Wherein, frame loss rate, minimal detectable power value, maximal received power value and mean receiving power value are the direct embodiment of the communication reliability of the corresponding projector of each tire and receptor, can pass through frame loss rate, minimal detectable power value, maximal received power value and mean receiving power value and judge the communication reliability of tire pressure monitoring system.Described central processing unit is stored after frame loss rate, minimal detectable power value, maximal received power value and the association of mean receiving power value of correspondence respectively by the position of wheel information of each projector and under the state of different stationary wheel parallactic angle degree, different moving velocitys, and minimal detectable power value, maximal received power value and the mean receiving power value of correspondence are carried out output display respectively by the position of wheel information of each projector and under different stationary wheel parallactic angle degree, difference are travelled speed state.
Above-described embodiment is preferably embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (10)
1. the communication reliability test method of tire pressure monitoring system, is characterized in that, comprises the following steps:
Trigger the projector that each tire is corresponding and send test data;
Receptor receives the test data that each projector sends, and received test data is forwarded to central processing unit;
Central processing unit judges the communication reliability of each projector and receptor according to received test data.
2. the communication reliability test method of tire pressure monitoring system according to claim 1, it is characterized in that, described central processing unit is specially according to the step of the communication reliability of the each projector of received test data and receptor: central processing unit is calculated the frame loss rate of each projector according to the test data of received test data and projector transmitting.
3. the communication reliability test method of tire pressure monitoring system according to claim 1, it is characterized in that, described receptor also detects the signal strength of test data, and being forwarded to central processing unit by detecting signal strength corresponding to data, described central processing unit calculates according to signal strength corresponding to test data magnitude of power corresponding to test data receiving.
4. the communication reliability test method of tire pressure monitoring system according to claim 1, it is characterized in that: the projector that each tire is corresponding also sends the id information that projector is corresponding when sending test data, receptor transfers to central processing unit by received test data and id information, and central processing unit is calculated projector that each ID is corresponding and the communication reliability of receptor.
5. the communication reliability test method of tire pressure monitoring system according to claim 1, it is characterized in that, in described central processing unit, according to received test data, judgement also comprises the step that judged result is carried out to the step of output display and judged result is stored after respectively answering the step of communication reliability of projector and receptor.
6. according to the communication reliability test method of the tire pressure monitoring system described in claim 1 to 5 any one, it is characterized in that, the step that the projector that the each tire of described triggering is corresponding sends test data is specially: central processing unit controls binary pair triggers successively the projector that each tire is corresponding and send respectively test data under different stationary wheel parallactic angle degree, difference are travelled speed state.
7. the communication reliability test method of tire pressure monitoring system according to claim 6, it is characterized in that, the described step that judged result is exported is specially: by the position of wheel information of each projector and under different stationary wheel parallactic angle degree, difference are travelled speed state, frame loss rate and the magnitude of power of correspondence are carried out output display respectively; The described step that judged result is stored is specially: by the position of wheel information of each projector and under the state of different stationary wheel parallactic angle degree, different moving velocitys, store respectively after the frame loss rate of correspondence, magnitude of power association.
8. the reliable communications system safety testing device of tire pressure monitoring system, is characterized in that, comprising:
Binary pair, triggers successively the projector that each tire is corresponding and sends test data;
Projector, sends test data according to the triggering of binary pair;
Receptor, receives the test data that each projector sends, and received test data is forwarded to central processing unit;
Central processing unit, judges the communication reliability of the corresponding projector of each tire and receptor according to received test data.
9. the reliable communications system safety testing device of tire pressure monitoring system according to claim 8, is characterized in that: also comprise for corresponding each tire projector is carried out to the display unit of output display and the memory cell for the communication reliability of corresponding each tire projector and receptor is stored with the communication reliability of receptor.
10. the reliable communications system safety testing device of tire pressure monitoring system according to claim 9, is characterized in that: described binary pair receives the trigger request instruction of central processing unit, and produces triggering command and trigger corresponding projector.
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| CN106444698A (en) * | 2016-08-31 | 2017-02-22 | 东风汽车公司 | Integrated testing device and method for tire pressure monitoring system |
| CN107891711A (en) * | 2017-09-30 | 2018-04-10 | 简式国际汽车设计（北京）有限公司 | A kind of optimal installation site of tire pressure receiver determines method |
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| CN114801603A (en) * | 2022-04-26 | 2022-07-29 | 一汽奔腾轿车有限公司 | Automobile tire pressure signal loss fault simulation test method |
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Application publication date: 20140430 |