CN101793948B - Low-frequency calibration system and method for passive entry system for vehicles - Google Patents
Low-frequency calibration system and method for passive entry system for vehicles Download PDFInfo
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- CN101793948B CN101793948B CN2010101029865A CN201010102986A CN101793948B CN 101793948 B CN101793948 B CN 101793948B CN 2010101029865 A CN2010101029865 A CN 2010101029865A CN 201010102986 A CN201010102986 A CN 201010102986A CN 101793948 B CN101793948 B CN 101793948B
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Abstract
The invention discloses a low-frequency calibration system and a low-frequency calibration method for a passive entry system for vehicles. A measurement module is manufactured by using a low-frequency receiving antenna at the key end of the passive entry system and an integrated circuit provided with a function of received signal strength indication (RSSI); measurement path planning is realized by using a measurement control module; the automatic continuous positioning of the measurement module is realized and the calibration time is shortened by using a three-dimensional machine positioning instrument; and the storage measuring point coordinates of the measurement control module and the corresponding measuring result are triggered by using a positioning confirmation signal fed back by the three-dimensional machine positioning instrument. In the system and the method, an expensive standard low-frequency receiving antenna and a standard receiver do not need to be bought, so that the cost of the calibration system is reduced; and at the same time, the measuring result does not need to calibrate with the actually used antenna and the receiving condition of the actually used low and medium frequency receiving antenna can be directly indicated, so that the automatic measuring process is realized and the measuring efficiency is high.
Description
Technical field
The present invention relates to a kind of radio field intensity calibration system and method, relate in particular to the automobile-used passive entering field intensity automatic calibration system and the method that need not standard antenna.
Background technology
Passive type is exempted from key and is got into (the PKE of system; Passive Keyless Entry) be to get on the system-based in remote keyless to grow up; Progressively develop as anti-theft technique of new generation, progressively got into field, middle-grade car market at present from luxury car market.PKE is not a traditional key, but an Intelligent key is similar to smart card.When the driver carried Intelligent key and steps into specified scope, this system discerned judgement to Intelligent key, if legal Intelligent key then carries out automatic unlocking.After getting on the bus, the driver only need get final product ignition trigger by a button.
In the disclosed patent of China Patent Office, a kind of non-key system for automobile and communication encrypting method thereof (application number 200910020805.1) and keyless passive entry system (application number 200710145918.5) keyless systems that is designed all belong to the system under test (SUT) of this patent.But do not see that about the demarcation of this type systematic and method of testing any data refers to.
A gordian technique of automobile-used passive entry system just is the accurate identification to the Intelligent key position, realizes and need demarcate through the low frequency field intensity the accurate identification of position.Existing field strength measurement scheme must adopt standard receiving antenna and reference receiver to realize, and is not only with high costs, and test result need just can be used for system calibrating with actual antennas after marking.
Summary of the invention
The technical matters that the present invention will solve provides a kind of low cost, high efficiency automobile passive entry system low frequency automatic calibration system and method.
The following technical scheme of the concrete employing of the present invention:
A kind of low-frequency calibration system of automobile-used passive entry system; Said system comprises: the three-dimensional machinery orientator; Be fixed in the nonmetal nonmagnetic substance extension rod on the three-dimensional machinery orientator Y axle; Be fixed in the measurement module of nonmetal nonmagnetic substance extension rod, the measurement control module that links to each other with the three-dimensional machinery orientator with measurement module away from three-dimensional machinery orientator one end.
Said measurement control module links to each other with the three-dimensional machinery orientator, transmits locating point position coordinate, step-length and speed of travel parameter to the three-dimensional machinery orientator, measures control module and links to each other with measurement module, accomplishes the real-time demonstration and the record of measurement data.Said measurement control module is provided with module, measurement data record module, internal storage and data interface module by the real-time display module of measurement data, measuring route parameter and forms:
Said measuring route parameter is provided with terminal coordinate, motion step-length and the speed of travel that module is used to be provided with the measurement module motion.
The real-time display module of said measurement data receives field intensity data and coordinate from measurement module through the RS232 interface, shows the field intensity that records in real time;
Said measurement data record module writes measurement result in internal storage;
Said data interface module is used to derive measurement result to the outside Flash storer with USB interface.
Said three-dimensional machinery orientator is used to carry out automatically three-dimensional localization continuously, accomplishes positioning action.Be fixed with nonmetal nonmagnetic substance extension rod on the three-dimensional machinery orientator Y axle, with the influence that the three-dimensional machinery orientator that reduces metal or magnetic material distributes to electromagnetic field, measurement module is fixed in the end of extension rod away from the three-dimensional machinery orientator.
Said low-frequency calibration system realizes automatically multipoint positioning continuously through measuring control module control three-dimensional machinery orientator; Make the field intensity in the automobile-used passive entry system low frequencies of the measurement module continuous coverage antenna surrounding space; Show the field intensity of measurement module position in real time through measuring control module, and utilize the positioning confirmation signal triggering of three-dimensional machinery orientator output measure control module in order with the field intensity data of measurement point and coordinate record to internal storage areas.
The invention also discloses a kind of low-frequency calibration method of automobile-used passive entry system, it is characterized in that, said scaling method may further comprise the steps:
(1) lays and fixing calibration system: in open space, the three-dimensional machinery orientator is fixed; Vehicle axis to be calibrated is parked in three-dimensional machinery orientator X axle; Measurement module is fixed on the three-dimensional machinery orientator Y shaft mechanical arm extension rod near an end of vehicle, and making between side to be calibrated and the measurement module of vehicle does not have other restraining mass;
(2) power on for the system of compiling and edit, the walking path and the density measurement of three-dimensional machinery orientator are set, and start measurement through the measurement control module;
(3) the three-dimensional machinery orientator is positioned to first test point with measurement module, and output positioning confirmation signal and current coordinate:
(4) measurement module is measured field strength, and output field intensity data are given and measured control module;
(5) measure control module and under from the positioning confirmation signal triggering of three-dimensional machinery orientator, the coordinate and the test result of current test point are recorded in the internal storage areas, so far accomplish the measurement of a point;
(6) then the three-dimensional machinery orientator according to measuring walking path and the density measurement that control module is provided with; Automatically measurement module is positioned to next test point; Begin to export positioning confirmation signal and current coordinate from step (3) again, so circulation is until the measurement of accomplishing all tested points; Then, the measurement data in the internal storage areas is exported to external memory storage, measure and finish.
The present invention utilizes employed low frequency receiving antenna of Intelligent key and the production of integrated circuits measurement module that possesses reception signal intensity indication (RSSI) function in the PEPS system; Utilize and measure the planning of control module realization measuring route; Utilize the three-dimensional machinery orientator to realize locating continuously automatically of measurement module; Shorten the nominal time, utilize the positioning confirmation signal triggering of three-dimensional machinery orientator feedback to measure control module storage measurement point coordinate and corresponding measurement result to internal storage.
The low frequencies antenna that the present invention can help the product designer of passive entry system to understand its product is installed on after the car load, the size of the zone of action and the field strength distribution in the zone of action; When possessing a plurality of low frequencies antenna in the passive entry system, can help to investigate the border of a plurality of antennas zone of action or the distribution situation of intersection field intensity; Can help the designer to understand vehicle window etc. does not have near signal strength distribution situation the special area that metal intercepts, for " in the car " in the system design, " car is outer " differentiated that reference frame is provided.And this present invention's measurement module has used and has been demarcated the used antenna of key in the gate control system, but not standard antenna; Measurement module utilizes is demarcated reception of the magnetic field in the used integrated circuit of key and signal condition function in the gate control system, but not uses standard LF receiver or frequency spectrograph, i.e. the present invention need not to buy expensive standard low frequency receiving antenna and reference receiver; Reduced the cost of calibration system; Simultaneously, the antenna that measurement result need not to use with reality can directly characterize the reception condition of actual use medium and low frequency receiving antenna to mark; And measuring process has realized robotization, and efficiency of measurement is high.
Description of drawings
Accompanying drawing 1 is the measurement module synoptic diagram.
Accompanying drawing 2 is to measure the control module synoptic diagram.
Accompanying drawing 3 is three-dimensional machinery orientator and nonmetal nonmagnetic substance extension rod putting position synoptic diagram.
Accompanying drawing 4 is connection synoptic diagram of calibration system each several part.
Accompanying drawing 5 is calibration system workflow diagrams.
Embodiment
Below in conjunction with Figure of description technical scheme of the present invention is done further explain.
Be illustrated in figure 1 as measurement module synoptic diagram of the present invention.Measurement module is made up of the chip and data interface circuit three parts of low-frequency antenna, band RSSI function, and it can utilize, and the employed low frequency receiving antenna of Intelligent key receives the production of integrated circuits measurement module (the for example PCF7952 of NXP semiconductor company) that signal intensity is indicated (RSSI) function with possessing in the PEPS system.The low frequency magnetic field signal that the low frequency receiving antenna receives converts digital signal to through the integrated circuit of band RSSI function, is transferred to the measurement control module through data interface circuit.
Be depicted as measurement control module synoptic diagram like accompanying drawing 2.Measure control module and receive field intensity data, show the field intensity that records in real time, and in internal storage, write measurement result through the measurement data record module through the real-time display module of measurement data from measurement module through the RS232 interface.Measurement result can export to the outside Flash storer of band USB interface through data interface module.Measure control module and link to each other with the three-dimensional machinery orientator, and transmit parameters such as locating point position coordinate, step-length and the speed of travel to it, the three-dimensional machinery orientator is accomplished positioning action.
Be depicted as three-dimensional machinery orientator and nonmetal nonmagnetic substance extension rod A putting position synoptic diagram like accompanying drawing 3, three-dimensional machinery orientator base major axis is the X axle, is the Z axle perpendicular to the mechanical arm major axis on ground, with the mechanical arm major axis of X axle and Z axle quadrature be the Y axle.In open space, the three-dimensional machinery orientator is fixed, vehicle axis to be calibrated is parked in three-dimensional machinery orientator X axle, and making the side to be calibrated of vehicle and being fixed between the measurement module on the mechanical arm extension rod A does not have other restraining mass.Should guarantee during installation that firmly in measuring process, moving can not appear in the base of three-dimensional machinery orientator.Extension rod A divides two kinds on linear pattern and L type, and L type extension rod can be used for measuring the zone that the inner linear pattern extension rod of car body can't be surveyed.Measurement module is fixed in the end of extension rod near car body.
Accompanying drawing 4 is depicted as the connection synoptic diagram of this calibration system each several part.Control module is measured through cable by measuring control module control by system, and control signal is sent to the three-dimensional machinery orientator, receives the positioning confirmation signal of three-dimensional machinery orientator feedback and the coordinate of current point simultaneously; Measurement module is sent to the measurement control module through the RS232 interface with measurement result continuously, measures control module and under from the positioning confirmation signal triggering of three-dimensional machinery orientator, the coordinate and the test result of current test point is recorded to and can exports in the storage area of outside Flash storer through USB interface.
Be depicted as the calibration system workflow like accompanying drawing 5.After system powers on, the walking path and the density measurement of three-dimensional machinery orientator are set, and start measurement through the measurement control module; The three-dimensional machinery orientator is positioned to first test point with measurement module; And output positioning confirmation signal and current coordinate; Measurement module is measured field strength; Output field intensity data are given and are measured control module, measure control module and under from the positioning confirmation signal triggering of three-dimensional machinery orientator, the coordinate and the test result of current test point are recorded to and can export to through USB interface in the storage area of outside Flash storer, so far accomplish the measurement of a point.The three-dimensional machinery orientator is positioned to next test point with measurement module automatically according to measuring walking path and the density measurement that control module is provided with then, begins to measure, and so circulation is until the measurement of accomplishing all tested points.
Claims (2)
1. the low-frequency calibration system of an automobile-used passive entry system; Said system comprises the three-dimensional machinery orientator; Be fixed in the nonmetal nonmagnetic substance extension rod on the three-dimensional machinery orientator Y axle, be fixed in nonmetal nonmagnetic substance extension rod away from three-dimensional machinery orientator one end and the measurement control module that links to each other with the three-dimensional machinery orientator near the measurement module of vehicle one end to be measured, with measurement module; It is characterized in that:
Said measurement module is made up of the chip and data interface circuit three parts of low frequency receiving antenna, band RSSI function; The low frequency receiving antenna is connected through the chip of signal wire with band RSSI function; Convert the low frequency magnetic field signal that receives to digital signal through the chip of being with the RSSI function; The chip of band RSSI function connects through data interface circuit again measures control module, digital data transmission is given measure control module, accomplishes the real-time demonstration and the record of measurement data by measuring control module;
Said measurement control module links to each other with the three-dimensional machinery orientator through cable, transmits locating point position coordinate, step-length and speed of travel parameter to the three-dimensional machinery orientator; Said measurement control module is provided with module, measurement data record module, internal storage and data interface module by the real-time display module of measurement data, measuring route parameter and forms:
Said measuring route parameter is provided with terminal coordinate, motion step-length and the speed of travel that module is used to be provided with the measurement module motion;
The real-time display module of said measurement data receives field intensity data and coordinate from measurement module through the RS232 interface, shows the field intensity that records in real time;
Said measurement data record module writes measurement result in internal storage;
Said data interface module is used to derive measurement result to the outside Flash storer with USB interface;
Said three-dimensional machinery orientator is used to carry out automatically three-dimensional localization continuously, accomplishes positioning action;
Said low-frequency calibration system realizes automatically multipoint positioning continuously through measuring control module control three-dimensional machinery orientator; Make the field intensity in the automobile-used passive entry system low frequencies of the measurement module continuous coverage antenna surrounding space; Show the field intensity of measurement module position in real time through measuring control module, and utilize the positioning confirmation signal triggering of three-dimensional machinery orientator output measure control module in order with the field intensity data of measurement point and coordinate record to internal storage areas.
2. the method for utilizing the low-frequency calibration system of the described automobile-used passive entry system of claim 1 to demarcate is characterized in that said scaling method may further comprise the steps:
(1) lays and fixing calibration system: in open space, the three-dimensional machinery orientator is fixed; Vehicle axis to be calibrated is parked in three-dimensional machinery orientator X axle; Measurement module is fixed on the three-dimensional machinery orientator Y shaft mechanical arm extension rod near an end of vehicle, and making between side to be calibrated and the measurement module of vehicle does not have other restraining mass;
(2) power on to calibration system, the walking path and the density measurement of three-dimensional machinery orientator are set, and start measurement through the measurement control module;
(3) the three-dimensional machinery orientator is positioned to first test point with measurement module, and output positioning confirmation signal and current coordinate:
(4) measurement module is measured field strength, and output field intensity data are given and measured control module;
(5) measure control module and under from the positioning confirmation signal triggering of three-dimensional machinery orientator, the coordinate and the test result of current test point are recorded in the internal storage areas, so far accomplish the measurement of a tested point;
(6) then the three-dimensional machinery orientator according to measuring walking path and the density measurement that control module is provided with; Automatically measurement module is positioned to next test point; Begin to export positioning confirmation signal and current coordinate from step (3) again, so circulation is until the measurement of accomplishing all tested points; Then, the measurement data in the internal storage areas is exported to external memory storage, measure and finish.
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102044101B (en) * | 2010-11-30 | 2012-07-25 | 深圳市航盛电子股份有限公司 | Smart card positioning method for automobile wireless access control system |
| CN104506260B (en) * | 2014-12-23 | 2017-10-03 | 北京万集科技股份有限公司 | ETC roadside devices field strength measurement and communication zone caliberating device, system and method |
| CN108226837A (en) * | 2016-12-22 | 2018-06-29 | 广州周立功单片机科技有限公司 | Keyless entry key automatic calibration system |
| GB2567138B (en) * | 2017-09-06 | 2020-04-01 | Continental Automotive Romania Srl | Method of automatic calibration |
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|---|---|---|---|---|
| JP2005163453A (en) * | 2003-12-04 | 2005-06-23 | Alps Electric Co Ltd | Passive keyless entry device |
| CN101343961A (en) * | 2008-07-29 | 2009-01-14 | 上海世科嘉车辆技术研发有限公司 | Non-key gate control system |
| CN101457610A (en) * | 2009-01-05 | 2009-06-17 | 许李纳 | Non-key system for automobile and communication encrypting method thereof |
| KR20090062174A (en) * | 2007-12-12 | 2009-06-17 | 현대자동차주식회사 | Smart key system using the lf antenna in tpms |
| CN201372630Y (en) * | 2009-01-20 | 2009-12-30 | 东风电子科技股份有限公司 | Automotive keyless entering system |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005163453A (en) * | 2003-12-04 | 2005-06-23 | Alps Electric Co Ltd | Passive keyless entry device |
| KR20090062174A (en) * | 2007-12-12 | 2009-06-17 | 현대자동차주식회사 | Smart key system using the lf antenna in tpms |
| CN101343961A (en) * | 2008-07-29 | 2009-01-14 | 上海世科嘉车辆技术研发有限公司 | Non-key gate control system |
| CN101457610A (en) * | 2009-01-05 | 2009-06-17 | 许李纳 | Non-key system for automobile and communication encrypting method thereof |
| CN201372630Y (en) * | 2009-01-20 | 2009-12-30 | 东风电子科技股份有限公司 | Automotive keyless entering system |
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