CN103580760B - Tire pressure monitoring system and RF communication efficiency method of testing thereof - Google Patents
Tire pressure monitoring system and RF communication efficiency method of testing thereof Download PDFInfo
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Abstract
The present invention relates to a kind of tire pressure monitoring system and RF communication efficiency method of testing thereof, wherein method comprises: extension set sends RF signal with predetermined transmission time interval to main frame; The frame number of the Frame included by RF signal is continuous successively; Main frame receives the RF signal that described extension set sends, and according to the frame number of Frame in the RF signal received whether continuously and RF signal reception time interval carry out the loss situation of identification data frame.The time interval that the continuity of the frame number of the RF signal that the present invention utilizes extension set to send and main frame receive RF signal has identified whether admission control, and the quantity of obliterated data and the distribution situation of obliterated data can be analyzed, greatly improve the precision of the RF communication efficiency test result of tire pressure monitoring system.<!--1-->
Description
Technical field
The present invention relates to automotive field, particularly relate to a kind of tire pressure monitoring system and RF (RadioFrequency, radio frequency) communication efficiency method of testing thereof.
Background technology
At present, main frame (being arranged on car steering indoor) and extension set (being arranged on inside tires) are mainly comprised to the tire pressure monitoring system of automotive tyre explosion safety monitoring, by the RF communication between main frame and extension set, realize the matching and debugging to main frame and extension set, assist and tire pressure of automobile tire is monitored.When in tire pressure, temperature or extension set, tire pressure monitoring modular voltage is in abnormality, main frame adopts voice and LED warning way prompting driver to take corresponding measure, vehicle is reduced to safe speed, dissolves disaster danger of blowing out, guarantee driving safety.
Along with the application of tire pressure monitoring system is more and more general, the manufacturer of tire pressure monitoring system gets more and more, and good product quality is the key of producer's competition, and the RF communication efficiency of product is one of most important parameters weighing product quality.
At present, general RF communication efficiency method of testing is: at test period, main frame to the actual RF signal-count from extension set received, after test completes, the theoretical interval time sent according to length of testing speech and RF signal calculates receivable number, then calculates RF communication efficiency.
But, due to the interval time of extension set actual transmission RF signal inconsistent (each signal sends needs there is a random time delay to solve signal problem of co-channel interference than standard transmission time interval), cause the efficiency inaccuracy that this method is calculated, and the Data distribution8 that also cannot analyze loss in which time period.
Summary of the invention
Main purpose of the present invention is to provide a kind of tire pressure monitoring system and RF communication efficiency method of testing thereof, is intended to the RF communication efficiency measuring accuracy improving tire pressure monitoring system.
The present invention proposes a kind of RF communication efficiency method of testing of tire pressure monitoring system, comprising:
Extension set sends RF signal with predetermined transmission time interval to main frame; The frame number of the Frame included by described RF signal is continuous successively;
Main frame receives the RF signal that described extension set sends, and according to the frame number of Frame in the RF signal received whether continuously and RF signal reception time interval carry out the loss situation of identification data frame.
Preferably, the predetermined transmission time interval setting described extension set is S, and maximum frame number is F; Described main frame according to the frame number of Frame in the RF signal received whether continuously and the RF signal reception time interval step of carrying out the loss situation of identification data frame comprise:
Described main frame judges that whether the frame number of the Frame of the two frame RF signals received continuously is continuous; If continuously, then
Judge whether the time of reception interval Span of described two frame RF signals is less than a frame number cycle period, and a described frame number cycle period equals S*F; If so, non-lost data frames is then judged as; Otherwise, be judged as admission control, and lost F* (Span/ (S*F)) individual frame.
Preferably, the frame number of the Frame of the two frame RF signals that main frame receives continuously is set as (fn, f (n+1)); Whether the frame number that described main frame judges the Frame of the two frame RF signals received continuously also comprises after continuous print step:
If described main frame judges that the frame number of the Frame of the two frame RF signals received continuously is discontinuous, then judge whether the time of reception interval Span of described two frame RF signals is less than a frame number cycle period, and a described frame number cycle period equals S*F; If so, then
Be judged as admission control, and lose f (n+1)-fn-1 frame; Otherwise
Be judged as admission control, and lose F* (Span/ (S1*F))+f (n+1)-fn-1 frame.
Preferably, the method also comprises:
The maximum frame number F of figure place is specified in described extension set definition.
Preferably, the method also comprises:
Described extension set setting sends the described transmission time interval of RF signal; Described transmission time interval is the Fixed Time Interval of setting, or certain time interval scope for setting.
The present invention also proposes a kind of tire pressure monitoring system testing RF communication efficiency, comprising: main frame and extension set, wherein
Described extension set, for sending RF signal with predetermined transmission time interval to described main frame; The frame number of the Frame included by described RF signal is continuous successively;
Described main frame, for receiving the RF signal that described extension set sends, and according to the frame number of Frame in the RF signal received whether continuously and RF signal reception time interval carry out the loss situation of identification data frame.
Preferably, the predetermined transmission time interval setting described extension set is S, and maximum frame number is F; Whether the frame number of described main frame also for the Frame judging the two frame RF signals received continuously be continuous; If continuously, then judge whether the time of reception interval Span of described two frame RF signals is less than a frame number cycle period, and a described frame number cycle period equals S*F; If so, non-lost data frames is then judged as; Otherwise, be judged as admission control, and lost F* (Span/ (S*F)) individual frame.
Preferably, the frame number of the Frame of the two frame RF signals that main frame receives continuously is set as (fn, f (n+1)); Described main frame also for when the frame number of the Frame judging the two frame RF signals received continuously is discontinuous, judges whether the time of reception interval Span of described two frame RF signals is less than a frame number cycle period, and a described frame number cycle period equals S*F; If so, be then judged as admission control, and lose f (n+1)-fn-1 frame; Otherwise be judged as admission control, and lose F* (Span/ (S1*F))+f (n+1)-fn-1 frame.
Preferably, described extension set is also for defining the described transmission time interval of maximum frame number F and the setting transmission RF signal of specifying figure place; Described transmission time interval is the Fixed Time Interval of setting, or certain time interval scope for setting.
A kind of tire pressure monitoring system that the present invention proposes and RF communication efficiency method of testing thereof, the time interval that the continuity of the frame number of the RF signal utilizing extension set to send and main frame receive RF signal has identified whether admission control, and the quantity of obliterated data and the distribution situation of obliterated data can be analyzed, greatly improve the precision of the RF communication efficiency test result of tire pressure monitoring system.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the RF communication efficiency method of testing preferred embodiment of tire pressure monitoring system of the present invention;
Fig. 2 be in the RF communication efficiency method of testing preferred embodiment of tire pressure monitoring system of the present invention main frame according to the frame number of Frame in the RF signal received whether continuously and RF signal reception time interval carry out the schematic flow sheet of the loss situation of identification data frame;
Fig. 3 is the structural representation that the present invention tests the tire pressure monitoring system preferred embodiment of RF communication efficiency.
In order to make technical scheme of the present invention clearly, understand, be described in further detail below in conjunction with accompanying drawing.
Embodiment
As shown in Figure 1, present pre-ferred embodiments proposes a kind of RF communication efficiency method of testing of tire pressure monitoring system, comprising:
Step S101, extension set sends RF signal with predetermined transmission time interval to main frame; The frame number of the Frame included by described RF signal is continuous successively;
In the present embodiment, extension set sends RF signal with predetermined transmission time interval to main frame, one is comprised with the Frame of frame number in each RF signal, pre-defined on extension set have a maximum frame number of specifying figure place, the frame number of Frame is numbered to maximum frame number successively by 0, extension set according to setting transmission time interval, with the order of frame number, successively by the dataframe of each frame number to main frame.Wherein, predetermined transmission time interval can be the Fixed Time Interval of setting, also can be certain time interval scope of setting.
Specifically when often sending a RF signal, the value of frame number being added 1 and being included in the Frame of transmission be sent to main frame.
Certainly, extension set, when the difference of the frame number of setting two continuous data frame, also in units of 1, but can not be numbered in units of predetermined difference.The present embodiment is 1 to be illustrated with the difference of the frame number of two continuous data frames.
Step S102, main frame receives the RF signal that described extension set sends, and according to the frame number of Frame in the RF signal received whether continuously and RF signal reception time interval carry out the loss situation of identification data frame.
After main frame receives the RF signal of extension set transmission, calculate and the interval time receiving RF signal last time, and the frame number frame number of Frame in current RF signal and last time being received data compares, if the former is larger than the latter 1 years old, then show that the frame number of the two frame RF signal data frames that main frame receives is continuous, otherwise, discontinuous.
The present embodiment main frame according to the frame number of Frame in the RF signal received whether continuously and RF signal reception time interval carry out the loss situation of identification data frame.
Particularly, as shown in Figure 2, if the predetermined transmission time interval setting described extension set is S, maximum frame number is F; Setting main frame receives the interval time of two frame RF signals continuously is simultaneously Span, the frame number of the Frame of the two frame RF signals that main frame receives continuously is (fn, f (n+1)), wherein, S, F and Span are the natural number being greater than 1, n is natural number, then above-mentioned steps S102 comprises:
Step S1021, main frame receives the RF signal that described extension set sends;
Step S1022, judges that whether the frame number of the Frame of the two frame RF signals received continuously is continuous; If so, then step S1023 is entered; Otherwise, enter step S1026;
Step S1023, judges whether the time of reception interval Span of described two frame RF signals is less than a frame number cycle period, and a described frame number cycle period equals S*F; If so, then step S1024 is entered; Otherwise, enter step S1025;
Step S1024, is judged as non-lost data frames;
Step S1025, has been judged as admission control, and loses F* (Span/ (S*F)) individual frame.
Step S1026, judges whether the time of reception interval Span of described two frame RF signals is less than a frame number cycle period, and a described frame number cycle period equals S*F; If so, then step S1027 is entered; Otherwise, enter step S1028;
Step S1027, has been judged as admission control, and loses f (n+1)-fn-1 frame;
Step S1028, has been judged as admission control, and loses F* (Span/ (S1*F))+f (n+1)-fn-1 frame.
That is, if the frame number of two frame RF signals that receives continuously of main frame continuously and time of reception interval is less than a frame number cycle period (Span<S*F), is then judged as that data receiver is continuous, non-lost data frames.
If the frame number of the two frame RF signals that main frame receives continuously is continuous, but time of reception interval is more than or equal to a frame number cycle period (Span >=S*F), then be judged as admission control, and lose F* (Span/ (S*F)) individual frame.
If the frame number (fn of the two frame RF signals that main frame receives continuously, f (n+1)) discontinuous and time of reception interval is less than a frame number cycle period (Span<S*F), then be judged as admission control, and lose f (n+1)-fn-1 frame.
If the frame number (fn of the two frame RF signals that main frame receives continuously, f (n+1)) discontinuous, but time of reception interval is more than or equal to a frame number cycle period (Span >=S*F), then be judged as admission control, and lose F* (Span/ (S1*F))+f (n+1)-fn-1 frame.
By such scheme, not only can identify in the RF communication between extension set and main frame whether have admission control, and can analyze the quantity of obliterated data and the distribution situation of obliterated data, the Data distribution8 that such as can analyze loss in which time period.
In addition, in actual application, the interval time of extension set signal not necessarily can remain S completely, suppose actual transmission time interval (S1≤S≤S2) between S1 to S2, then when this method is applied, for ensureing the accuracy judged, need guaranteed conditions (m+1) * S1*F>m*S2*F (wherein m is the frame number circulating cycle issue lost), i.e. m<S1/ (S2-S1) and S1>m*S2/ (m+1), can analyze following several situation:
As S1=S2, this method application is unrestricted, and to the no requirement (NR) of F value;
As S1≤S2/2, this method cannot be applied;
As S1>S2/2 and main frame receives time interval Span >=S1*F/ (S2-S1) of two frame RF signals continuously time there will be misjudgment, in such cases, range of application can be increased by arranging larger F value.
The time interval that the continuity of the frame number of the RF signal that the present embodiment utilizes extension set to send and main frame receive RF signal has identified whether admission control, and the quantity of obliterated data and the distribution situation of obliterated data can be analyzed, greatly improve the precision of the RF communication efficiency test result of tire pressure monitoring system.
As shown in Figure 3, present pre-ferred embodiments proposes a kind of tire pressure monitoring system testing RF communication efficiency, comprising: main frame 301 and extension set 302, wherein
Described extension set 302, for sending RF signal with predetermined transmission time interval to described main frame 301; The frame number of the Frame included by described RF signal is continuous successively;
Described main frame 301, for receiving the RF signal that described extension set 302 sends, and according to the frame number of Frame in the RF signal received whether continuously and RF signal reception time interval carry out the loss situation of identification data frame.
In the present embodiment, extension set 302 sends RF signal with predetermined transmission time interval to main frame 301, one is comprised with the Frame of frame number in each RF signal, pre-defined on extension set 302 have a maximum frame number of specifying figure place, the frame number of Frame is numbered to maximum frame number successively by 0, extension set 302 according to setting transmission time interval, with the order of frame number, successively by the dataframe of each frame number to main frame 301.Wherein, predetermined transmission time interval can be the Fixed Time Interval of setting, also can be certain time interval scope of setting.
Specifically when often sending a RF signal, the value of frame number being added 1 and being included in the Frame of transmission be sent to main frame 301.
Certainly, extension set 302, when the difference of the frame number of setting two continuous data frame, also in units of 1, but can not be numbered in units of predetermined difference.The present embodiment is 1 to be illustrated with the difference of the frame number of two continuous data frames.
After main frame 301 receives the RF signal of extension set 302 transmission, calculate and the interval time receiving RF signal last time, and the frame number frame number of Frame in current RF signal and last time being received data compares, if the former is larger than the latter 1 years old, then show that the frame number of the two frame RF signal data frames that main frame 301 receives is continuous, otherwise, discontinuous.
The present embodiment main frame 301 according to the frame number of Frame in the RF signal received whether continuously and RF signal reception time interval carry out the loss situation of identification data frame.
Particularly, the predetermined transmission time interval setting described extension set 302 is S, and maximum frame number is F; The interval time simultaneously setting the continuous reception of main frame 301 two frame RF signals is Span, the frame number of the Frame of the two frame RF signals that main frame 301 receives continuously is (fn, f (n+1)), wherein, S, F and Span are the natural number being greater than 1, n is natural number, then main frame 301 according to the frame number of Frame in the RF signal received whether continuously and the RF signal reception time interval process of carrying out the loss situation of identification data frame be:
First main frame 301 judges that whether the frame number of the Frame of the two frame RF signals received continuously is continuous; If continuously, then judge whether the time of reception interval Span of described two frame RF signals is less than a frame number cycle period, and a described frame number cycle period equals S*F; If so, non-lost data frames is then judged as; Otherwise, be judged as admission control, and lost F* (Span/ (S*F)) individual frame.
If when described main frame 301 judges that the frame number of the Frame of the two frame RF signals received continuously is discontinuous, then judge whether the time of reception interval Span of described two frame RF signals is less than a frame number cycle period, and a described frame number cycle period equals S*F; If so, be then judged as admission control, and lose f (n+1)-fn-1 frame; Otherwise be judged as admission control, and lose F* (Span/ (S1*F))+f (n+1)-fn-1 frame.
It should be noted that, in the present embodiment, tire pressure monitoring system can be BMBS (blow out monitoring and safety control system, Blow-outMonitoringandBrakeSystem), also can be TPMS (tire pressure monitoring system).
By such scheme, not only can identify in the RF communication between extension set and main frame whether have admission control, and can analyze the quantity of obliterated data and the distribution situation of obliterated data, the Data distribution8 that such as can analyze loss in which time period.
In addition, in actual application, the interval time of extension set signal not necessarily can remain S completely, suppose actual transmission time interval (S1≤S≤S2) between S1 to S2, then when this method is applied, for ensureing the accuracy judged, need guaranteed conditions (m+1) * S1*F>m*S2*F (wherein m is the frame number circulating cycle issue lost), i.e. m<S1/ (S2-S1) and S1>m*S2/ (m+1), can analyze following several situation:
As S1=S2, this method application is unrestricted, and to the no requirement (NR) of F value;
As S1≤S2/2, this method cannot be applied;
As S1>S2/2 and main frame receives time interval Span >=S1*F/ (S2-S1) of two frame RF signals continuously time there will be misjudgment, in such cases, range of application can be increased by arranging larger F value.
Embodiment of the present invention tire pressure monitoring system and RF communication efficiency method of testing thereof, the time interval that the continuity of the frame number of the RF signal utilizing extension set to send and main frame receive RF signal has identified whether admission control, and the quantity of obliterated data and the distribution situation of obliterated data can be analyzed, greatly improve the precision of the RF communication efficiency test result of tire pressure monitoring system.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or flow process conversion; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (5)
1. a radio frequency communication efficiency method of testing for tire pressure monitoring system, is characterized in that, comprising:
Extension set sends RF signal with predetermined transmission time interval to main frame; The frame number of the Frame included by described RF signal is continuous successively;
Main frame receives the RF signal that described extension set sends, and according to the frame number of Frame in the RF signal received whether continuously and RF signal reception time interval carry out the loss situation of identification data frame;
The predetermined transmission time interval setting described extension set is S, and maximum frame number is F, sets the frame number of the Frame of the two frame RF signals that main frame receives continuously as (fn, f (n+1));
Described main frame according to the frame number of Frame in the RF signal received whether continuously and the RF signal reception time interval step of carrying out the loss situation of identification data frame comprise: described main frame judges that whether the frame number of the Frame of the two frame RF signals received continuously continuous; If continuously, then judge whether the time of reception interval Span of described two frame RF signals is less than a frame number cycle period, and a described frame number cycle period equals S*F; If so, non-lost data frames is then judged as; Otherwise, be judged as admission control, and lost F* (Span/ (S*F)) individual frame;
If described main frame judges that the frame number of the Frame of the two frame RF signals received continuously is discontinuous, then judge whether the time of reception interval Span of described two frame RF signals is less than a frame number cycle period, and a described frame number cycle period equals S*F; If so, be then judged as admission control, and lose f (n+1)-fn-1 frame; Otherwise be judged as admission control, and lose F* (Span/ (S*F))+f (n+1)-fn-1 frame.
2. method according to claim 1, is characterized in that, also comprises:
The maximum frame number F of figure place is specified in described extension set definition.
3. method according to claim 2, is characterized in that, also comprises:
Described extension set setting sends the described transmission time interval of RF signal; Described transmission time interval is the Fixed Time Interval of setting, or certain time interval scope for setting.
4. test a tire pressure monitoring system for RF communication efficiency, it is characterized in that, comprising: main frame and extension set, wherein:
Described extension set, for sending RF signal with predetermined transmission time interval to described main frame; The frame number of the Frame included by described RF signal is continuous successively;
Described main frame, for receiving the RF signal that described extension set sends, and according to the frame number of Frame in the RF signal received whether continuously and RF signal reception time interval carry out the loss situation of identification data frame;
The predetermined transmission time interval setting described extension set is S, and maximum frame number is F; Set the frame number of the Frame of the two frame RF signals that described main frame receives continuously as (fn, f (n+1));
Whether the frame number of described main frame also for the Frame judging the two frame RF signals received continuously be continuous; If continuously, then judge whether the time of reception interval Span of described two frame RF signals is less than a frame number cycle period, and a described frame number cycle period equals S*F; If so, non-lost data frames is then judged as; Otherwise, be judged as admission control, and lost F* (Span/ (S*F)) individual frame;
If when described main frame judges that the frame number of the Frame of the two frame RF signals received continuously is discontinuous, then judge whether the time of reception interval Span of described two frame RF signals is less than a frame number cycle period, and a described frame number cycle period equals S*F; If so, be then judged as admission control, and lose f (n+1)-fn-1 frame; Otherwise be judged as admission control, and lose F* (Span/ (S*F))+f (n+1)-fn-1 frame.
5. system according to claim 4, is characterized in that, described extension set is also for defining the described transmission time interval of maximum frame number F and the setting transmission RF signal of specifying figure place; Described transmission time interval is the Fixed Time Interval of setting, or certain time interval scope for setting.
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| JP6956624B2 (en) * | 2017-03-13 | 2021-11-02 | パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカＰａｎａｓｏｎｉｃ Ｉｎｔｅｌｌｅｃｔｕａｌ Ｐｒｏｐｅｒｔｙ Ｃｏｒｐｏｒａｔｉｏｎ ｏｆ Ａｍｅｒｉｃａ | Information processing methods, information processing systems, and programs |
| CN111830913A (en) * | 2019-04-22 | 2020-10-27 | 北京国电智深控制技术有限公司 | Data acquisition method and device |
| CN112838892B (en) * | 2019-11-25 | 2022-07-15 | 北京天诚同创电气有限公司 | Testing device and method for Ethernet MAC data communication optical module |
| CN113858895B (en) * | 2021-11-24 | 2023-03-24 | 保隆霍富(上海)电子有限公司 | Method for preventing signal loss of tire pressure detection system |
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| CN101277260A (en) * | 2007-03-27 | 2008-10-01 | 中兴通讯股份有限公司 | Data transmission method for high speed packet service |
| CN102299767A (en) * | 2011-08-31 | 2011-12-28 | 深圳市元征软件开发有限公司 | Wireless communication quality monitoring method for tire pressure monitoring system (TPMS) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101277260A (en) * | 2007-03-27 | 2008-10-01 | 中兴通讯股份有限公司 | Data transmission method for high speed packet service |
| CN102299767A (en) * | 2011-08-31 | 2011-12-28 | 深圳市元征软件开发有限公司 | Wireless communication quality monitoring method for tire pressure monitoring system (TPMS) |
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Effective date of registration: 20200304 Address after: 214500 Jiangping Road, Jingjiang City, Taizhou, Jiangsu Province, No. 51 Patentee after: Huada Automotive Technology Co., Ltd. Address before: 2 building, No. 23, No. two, LIAN Science Park, South Bay Street, Longgang District, Shenzhen District, Guangdong, 518114 Patentee before: CLOUD-ATLAS CONTROL SYSTEM CO., LTD. |