CN1262747A - Method and device for testing double sensor system - Google Patents
Method and device for testing double sensor system Download PDFInfo
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- CN1262747A CN1262747A CN98806998A CN98806998A CN1262747A CN 1262747 A CN1262747 A CN 1262747A CN 98806998 A CN98806998 A CN 98806998A CN 98806998 A CN98806998 A CN 98806998A CN 1262747 A CN1262747 A CN 1262747A
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- 238000012360 testing method Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims description 25
- 230000004044 response Effects 0.000 claims abstract description 41
- 230000035945 sensitivity Effects 0.000 claims abstract description 39
- 230000008859 change Effects 0.000 claims abstract description 10
- 239000003550 marker Substances 0.000 claims description 32
- 230000033001 locomotion Effects 0.000 claims description 10
- 230000003137 locomotive effect Effects 0.000 claims description 7
- 230000006698 induction Effects 0.000 description 9
- 239000002184 metal Substances 0.000 description 8
- 238000012545 processing Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 3
- 230000003679 aging effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000004807 localization Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B9/00—Safety arrangements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
- G01D3/08—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for safeguarding the apparatus, e.g. against abnormal operation, against breakdown
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
- B61L25/02—Indicating or recording positions or identities of vehicles or trains
- B61L25/025—Absolute localisation, e.g. providing geodetic coordinates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
- B61L25/02—Indicating or recording positions or identities of vehicles or trains
- B61L25/026—Relative localisation, e.g. using odometer
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
With a double sensor system used for positioning purposes in safety applications, an operating failure, including an inadmissible increase in the sensitivity of one of the sensors (S1, S2), is made known because reference marks (RM1, RM2) each having a response section (AA1, AA2) and a test section (PA11, PA21) are provided for. If operations are proceeding correctly the sensor emits a first output signal (AS1) in the area of the response section and a second output signal (AS1) in the area of the test section. In contrast, when a maximum sensitivity threshold (P) is exceeded the sensor also produces the first output signal (AS1) in the area of the test section. If there is a known change in the signal of the other sensor this is used to test the change in the output signal of the first sensor.
Description
The present invention relates to field of locating technology, especially follow the safe absolute fix technical field of the transportation system of track operation.The present invention relates to a kind of method and device of testing double sensor system.
In the transportation system relevant, in the especially manned transportation system, must satisfy high safety requirements at aspects such as accurate location with track.For example require the safety of passenger getting on/off in the bus stop scope, or require locomotive accurately locating in the lock road up and down, thereby accurately determine the position of the scope of getting on or off the bus (door) in the stop scope.Precondition to this is a kind of safe sensor technology (redundant back-up system or function insurance system) and satisfies high accuracy requirement.
In the sensor that is suitable for locating automatically inductive activity is for example arranged, it is reacted to the sheet metal of stationkeeping.Use double-sensor system at this, its double-channel hardware carries out a kind of in the analysis and the processing of calculating safety aspect the signalling technique to sensor signal, can satisfy relevant safety standard (for example DIN VDE 0801, and DIN 19250, M ü 8004) thus.In general, sensor has an induction range that is called the active sensor lobe, at this scope inner sensor a reference marker is responded.Quote its orientation of living in a definite output signal when for example the induction pick-up that metal is responded is in a sheet metal is in its induction range.The induction range of this sensor and the sensitivity minimization that guarantees aspect manufacturer can obtain from supporting data information or quality verification data usually.
In safety technique is used, computing machine of the assembly of analyzing-for example or relay circuit (" safety connects ")-and sensor function all must be safe and reliable.Therefore require to have a kind of inefficacy to disclose mechanism to sensor itself is same.The complete failure of sensor can be confirmed in the announcement time of allowing by double-channel where necessary.At this, single error must be safe from harm to total system, and should mistake must obtain within a certain period of time disclosing.Determine according to the crash rate of whole sensor system in this longest announcement time of allowing.In double-sensor system (2 systems in so-called 2 (2 von 2System)), according to 8004 these times of railway standard Mu be MTBF/1000 (MTBF is the abbreviation of English mean time between failure, refers to mean time to failure, MTTF).
Yet, when being used for the location of safety technique application, double-sensor system can produce a specific question, that is and, the sensitivity of a sensor in the two sensors significantly raises in operational process.This sensitivity for example raises can be owing to from due to the aging effect of the aging effect of analysis circuit, sensor signal collator or sensor itself.In framework of the present invention, sensor also comprises the interface (Schnittstelle) of the double-channel signal transmission line of the equipment that is used for sensor signal analysis and processing that joins with it and this double-sensor system except referring to real main sensors element.Under the conventional applicable cases of sensor, note focusing on guaranteeing that this sensor has a minimum sensitivity and keeps this minimum sensitivity, and the rising of this sensitivity often is not crucial.Therefore in a kind of double-sensor system that is applied in the safety technique field, the rising of the sensitivity of a sensor can cause this sensor to confirm that not only those set have telltale mark to be detected under the failure-free operation condition, and for example also will be in object around this mark and survey mistakenly and be mark.When adopting a kind of induction pick-up, the locating information that just may lead to errors for example along the hardware of route.
Therefore the object of the present invention is to provide a kind of method and apparatus that is used for testing double sensor system, this system still can position in the safety technique field when sensor has a sensitivity of not allowing to raise therein.
The objective of the invention is that method by a kind of testing double sensor system realizes, this double-sensor system has two sensors and is used on the locomotive, and whether this method is used to test one of them sensor has a sensitivity of not allowing to raise.In the method, described two sensors cross stationkeeping respectively and have a reference marker that responds section and at least one test section along a direction of motion; And when learning that reference marker under in the of one is crossed, by detecting through its sensor when another sensor on the reference marker limit that belongs to it through out-of-date, and whether this sensor produces an output signal and changes during from scope that the scope of its test section enters the response section or during reverse motions.Wherein, the reference marker of each stationkeeping and each sensor are corresponding mutually; Under the condition of the sensitivity field of considering sensor, select sensor and affiliated reference marker and they are mated mutually, make and in response section scope, provide first output signal at the sensor of working within the sensitivity tolerance of allowing, and in the test section scope, provide another, i.e. second output signal; Even if in the test section scope, also provide first output signal but a sensitivity surpasses a sensor of allowing the threshold of sensitivity.
Claim 6 has provided a kind of device of realizing above-mentioned purpose.
A major advantage of the present invention is, adopt simple means also can disclose a sensor owing to its rising of not allowing the inefficacy that causes of sensitivity.For this reason, according to the present invention, reference marker and sensor are mated mutually, make for the sensor of within sensitivity tolerance given in advance, working, they only respond in the scope of response section, then not response of these sensors in the scope of test section (it has the predetermined relative location with respect to this response section).Owing to can infer reliably from the signal of sensor of a correct job: another sensor or its induction (sensitivity) field or when double-sensor system continuation motion estimate soon to carry out the transition to the response section from test section, or carry out the transition to test section from the response section on the contrary, therefore can be automatically and preferred cycle ground realize a kind of not only reliable but also satisfy the sensor test of safety specifications.The frequency of test is preferably determined according to the fiduciary level data and the service condition of sensor.
Aspect signal processing technology, this test is preferably carried out after definitely leaving described reference marker.
Consider sensor each other or and reference marker between may the location tolerance, and the induction field of each sensor has different bulk, according to a preferred design of the present invention, whether a kind of output signal variation of two sensors of test is created within the transit time or within a definite track section.Change except monitoring this output signal in time, especially in the transportation system relevant, provide a kind of test relevant, because the transportation system relevant with track has for example increment road test device usually with track section with track.
According to a favourable design of the inventive method, increase the number of the section variation of the reference marker relevant with test, that is, before the response section, a test section is set respectively, a test section is set thereafter.
Basically can between test section and response section, a known sept (Beabstandung) be set.By the p-wire section is directly adjoined with the response section, can aspect signal processing technology, particularly advantageously analyze output signal and change.
By an accompanying drawing method of the present invention is described in further detail below, in the accompanying drawing:
Fig. 1 illustrates the application of the inventive method aspect railway technology;
Fig. 2 illustrates the sensitivity field of a sensor;
Fig. 3 illustrates sensor output signal.
As shown in Figure 1, a manned locomotive F who travels on direction of motion B comprises a double-channel safety connection that connects the output signal of two induction pick-up S1, S2.At this, with security-related conventional system in fail-safe computer R of configuration, it to the output signal of sensor side do a kind of safety connect (under simple scenario for a kind of " with " be connected), definite locomotive F of final generation is with respect to a section, especially the positioning signal OS of the position of a railway station BHF from this connection.This positioning signal OS or localization criteria for example are used for the safe opening of car door so that the passenger at the train station on the platform the predetermined zone of getting on or off the bus get on or off the bus.Only when localization criteria OS occurs, just open over against the corresponding car door of platform.
Each sensor S1, S2 have the fixed reference mark RM1, the RM2 that are arranged on railway station BHF.When adopting a kind of induction pick-up, this reference marker can be designed to simple sheet metal.Yet can have multiple other sensor and the combination of affiliated reference marker, the equipment based on the optical scanning principle is for example arranged.Each reference marker RM1, RM2 comprise response section (sheet metal) AA1, an AA2, and the length of sheet metal is L.B looks from direction of motion, response section AA1, and the both sides of AA2 one in front and one in back are right after test section PA11, PA12 or PA21, PA22 respectively.
The schematically illustrated sensor that is equivalent to sensor S1 and S2 of Fig. 2, it sends the lobe of a three-dimensional, and promptly so-called active lobe is referred to as sensitivity field EF below.In the height H of this preferred sensitivity field EF greater than its width B.
Refer again to Fig. 1 as can be known, under the condition of the sensitivity field EF (Fig. 2) that considers each sensor S1, S2, to the size of each sensor S1, S2 and affiliated reference marker RM1 or RM2 determine, the location and mutually configuration should make sensor S1, S2 in the scope of response section AA1, AA2, provide first output signal AS1, AS2.Therefore, each sensor S1, S2 have a sensitivity tolerance scope TB, its magnitude range should make a correct sensor of working when leaving a detectable reference marker district, on a response lag interval S, disconnected reliably, that is, send second sensor signal AS1, AS2.This signal AS1, AS2 are different with first sensor signal AS1, AS2, it in the sensor of correct work and its sensitivity field in case no longer be in response section AA1 separately or just just be issued immediately during AA2.Select sensors configured and reference marker in addition, make reference marker and its a response section and sensor workplace distance and arranging at interval, thereby make the sensitivity field of sensor touch this response section, and this sensor provide sensor signal AS1 or AS2 thus at shown position.To (being in non-failure state) sensor of correct work, the response lag interval S is in described workplace apart between A and the test threshold spacing P.As long as sensor works within described margin tolerance TB, when metal parts was in distance greater than the place of response lag interval S, each sensor promptly sent another output signal AS1 or AS2.
Yet should suppose in order to further specify the inventive method: sensor S1 exceeded a predetermined peak response threshold value (response lag interval S) owing to lose efficacy, and made it also can survey metal parts in test threshold spacing P.In this case, when sensor S1 for example faced preposition test section PA11, it also provided output signal AS1.Although therefore sensor S1 reality does not detect response section AA1, it phonily sends the signal that has arrived bit position undetermined (for example stop scope of car door) owing to the high sensitivity of not allowing.In this case, because the safety by computing machine R connects, (it does not arrive response section AA2 in fact equally, but is correctly working to lack sensor S2, therefore because high sensitivity and do not send an output signal AS2 equally) output signal AS2, open car door and be obstructed.
Adopt method of the present invention, can disclose this supersensitive a kind of inefficacy of sensor S1 by the mode of following detailed description.For this reason, when the reference marker RM2 with sensor S2 phase configuration is crossed, and in another sensor S1 motion during through the response section AA1 of the reference marker RM1 of configuration with it, the output signal characteristics of testing sensor S1.Can determine in the example of hypothesis like this: sensor S1 can not produce signal and change (changing to output signal AS1 from output signal AS1) through a definite distance or when being transformed into definite transit time the response section AA1 from test section PA11.Can confirm equally: when locomotive continued to move to sensor S2 and leaves the moment of response section AA2 from position shown in Figure 1, the output signal of sensor S1 can not change.Because sensor S1 still sends output signal AS1 because of its high sensitivity of not allowing in the scope of test section PA12 at this moment.In contrast, the sensor of a correct job changes to output signal AS1 with signal from output signal AS1 in this case.
For above-described process is described, Fig. 3 is shown specifically sensor S1, S2 and is in diverse location with respect to its corresponding reference mark RM1, RM2.Row among Fig. 3 (1) illustrates a kind of situation, and at this moment, sensor S1, S2 still are in and respond section AA1, AA2 preceding test section PA11, PA21 separately.Sensor S1, the S2 of correct work do not send response signal, but send second signal AS1 or AS2 (consulting the column under the S1 and S2 among Fig. 3).Row among Fig. 3 (2) illustrates a transition period just, and at this moment, sensor is in test section and the zone of transition of response between the section.Because inside configuration tolerance and/or position of related features, sensor S2 does not also change its output signal, and sensor S1 responds.But after through a predetermined transit time and/or highway section, sensor S2 also changes its output signal, this in table with transit time Δ t represent.In the time of in two sensors all are in response section AA1, AA2, they keep its output signal AS1, AS2 (referring to the 3rd sensing station of Fig. 3 capable (3)).Row (4) illustrates sensor with the sensing station shown in the row (5) and leaves response section and relevant therewith conversion of signals among Fig. 3.At this interval of delta t transit time of a permission is arranged also, change to second output signal AS1 with signal from first output signal AS1 as the sensor S1 of first sensor this moment in the present embodiment.
Last hurdle among Fig. 3 is S1 ', and the situation of foregoing description complementally is shown therein: the sensitivity of sensor S1 exceeds test threshold spacing P (Fig. 1), so sensor S1 ' has sent first output signal AS1 in test section PA11.Even if this output signal also exists when sensor S1 arrives the response section AA1 of the reference marker RM1 that disposes with it.According to the inventive method, can determine the test duration section of sensor S1 by the output signal variation of sensor S2, and confirm that simultaneously changing can not appear in the output signal of sensor S1.(stage relevant with test represented by the horizontal arrow in the table).
Claims (6)
1. a locomotive of test (F) a kind of comprises the method that two sensors (S1, S2) and one of them sensor have the double-sensor system that a sensitivity of not allowing raises, wherein,
-described two sensor (S1, S2) cross stationkeeping respectively and have a response section (AA1 along a direction of motion (B), AA2) and at least one test section (PA11, PA21) reference marker (RM1, RM2), and when learning that reference marker (RM2) under in the of one is when being crossed, belonging to its reference marker (RM1) limit through out-of-date by detecting through its this sensor (S2) when another sensor (S1), and this sensor (S1) is during from scope that the scope of its test section (PA11) enters response section (AA1) or during reverse motions, whether can produce an output signal changes, wherein
The reference marker of-each stationkeeping and each sensor (S1, S2) corresponding mutually respectively, under the condition of the sensitivity field (EF) of considering sensor, select sensor and affiliated reference marker and they are mated mutually, make the sensor (S1 that within a sensitivity tolerance of allowing (TB), works, S2) at response section (AA1, AA2) provide first output signal (AS1 in the scope, AS2), at test section (PA12, PA21) provide second output signal (AS1 in the scope, and sensitivity surpasses one and allows that the sensor (S1) of the threshold of sensitivity (P) is even if also provide described first output signal (AS1) in the scope of described test section (PA11) AS2).
2. method according to claim 1,
-wherein, described test is carried out after definitely leaving described reference marker (RM1).
3. method according to claim 1 and 2,
-wherein, carry out following a kind of test, that is, whether the output signal of testing two sensors (S1, S2) can or change within a definite track section within a transit time (Δ t).
4. according to the described method of above-mentioned each claim,
-wherein,, a test section (PA12) is set thereafter at the preceding test section (PA11) that is provided with of described response section (AA1).
5. according to the described method of above-mentioned each claim,
-wherein, described test section (PA11) directly adjoins with response section (AA1).
6. one kind has a device that is contained in the reference marker of the double-sensor system that comprises two sensors (S1, S2) on the locomotive (F) and two stationkeeping, it tests this double-sensor system when a sensor has a sensitivity of not allowing to raise therein, wherein
-each sensor is with each stationkeeping and have a response section (AA1, AA2) and at least one test section (PA11, PA21) reference marker (RM1, RM2) corresponding mutually, under the condition of the sensitivity field (EF) of considering sensor, select sensor and affiliated reference marker and they are mated mutually, make the sensor (S1 that within a sensitivity tolerance of allowing (TB), works, S2) at response section (AA1, AA2) provide first output signal (AS1 in the scope, AS2), at test section (PA12, PA21) provide second output signal (AS1 in the scope, AS2), and a sensitivity is allowed the sensor (S1) of the threshold of sensitivity even if also provide described first output signal (AS1) in the scope of described test section (PA11) above one, in addition
-computing machine that links to each other with described sensor of configuration in double-sensor system, it at described sensor along a direction of motion (B) when crossing reference marker, and when learning that reference marker (RM2) under in the of one is when being crossed, belonging to its reference marker (RM1) limit through out-of-date by detecting through its this sensor (S2) when another sensor (S1), and whether this sensor (S1) can produce an output signal and change during from scope that the scope of described test section (PA11) enters response section (AA1) or during reverse motions.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19730259A DE19730259C1 (en) | 1997-07-09 | 1997-07-09 | Method and arrangement for testing a double sensor system |
| DE19730259.9 | 1997-07-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1262747A true CN1262747A (en) | 2000-08-09 |
Family
ID=7835746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98806998A Pending CN1262747A (en) | 1997-07-09 | 1998-07-09 | Method and device for testing double sensor system |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0996874A2 (en) |
| KR (1) | KR20010021584A (en) |
| CN (1) | CN1262747A (en) |
| DE (1) | DE19730259C1 (en) |
| WO (1) | WO1999003023A2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644349A (en) * | 2009-03-12 | 2014-03-19 | 艾默生过程管理电力和水力解决方案有限公司 | Methods and apparatus to arbitrate valve position sensor redundancy |
| CN108732920A (en) * | 2017-04-19 | 2018-11-02 | 英飞凌科技股份有限公司 | Test collisions sensor device during vehicle operation |
| CN109416545A (en) * | 2016-07-11 | 2019-03-01 | 爱知制钢株式会社 | Magnetic mark detection system and magnetic mark detection method |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1078729A1 (en) * | 1999-08-25 | 2001-02-28 | Engel Maschinenbau Gesellschaft Mbh | Injection moulding machine with means to detect a sensor failure |
| JP2001264128A (en) * | 2000-03-22 | 2001-09-26 | Mitsubishi Electric Corp | Abnormality detector for sensor and controller for vehicle |
| DE102005046456B4 (en) * | 2005-09-20 | 2007-06-06 | Siemens Ag | Method for determining the location and / or a movement quantity of moving objects, in particular of moving track-bound vehicles |
| DE102006049684A1 (en) * | 2006-10-13 | 2008-04-17 | Siemens Ag | System and method for determining the path and / or speed of vehicles, in particular for train control |
| JP6234497B2 (en) | 2016-03-15 | 2017-11-22 | Thk株式会社 | Encoder device and motion guide device with encoder device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2034990B (en) * | 1978-10-23 | 1983-06-15 | American Standard Inc | Phase sensitive product detector |
| DE2952106C2 (en) * | 1979-12-22 | 1982-11-04 | Dr. Johannes Heidenhain Gmbh, 8225 Traunreut | Photoelectric incremental length or angle measuring device |
| FR2573377B1 (en) * | 1984-11-16 | 1987-02-13 | Sncf | CONTROL SYSTEM FOR TRAIN SENSORS PLACED ALONG A RAILWAY |
| DE4132393C2 (en) * | 1991-09-26 | 1998-07-09 | Siemens Ag | Sensor device for a rail contact |
| DE4421327C2 (en) * | 1993-07-21 | 2002-11-14 | Tiefenbach Gmbh | warning system |
| JP3221184B2 (en) * | 1993-10-13 | 2001-10-22 | 株式会社日立製作所 | Failure diagnosis apparatus and method |
-
1997
- 1997-07-09 DE DE19730259A patent/DE19730259C1/en not_active Expired - Fee Related
-
1998
- 1998-07-09 KR KR1020007000142A patent/KR20010021584A/en not_active Application Discontinuation
- 1998-07-09 WO PCT/DE1998/002007 patent/WO1999003023A2/en not_active Application Discontinuation
- 1998-07-09 CN CN98806998A patent/CN1262747A/en active Pending
- 1998-07-09 EP EP98945009A patent/EP0996874A2/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644349A (en) * | 2009-03-12 | 2014-03-19 | 艾默生过程管理电力和水力解决方案有限公司 | Methods and apparatus to arbitrate valve position sensor redundancy |
| CN103644349B (en) * | 2009-03-12 | 2016-04-06 | 艾默生过程管理电力和水力解决方案有限公司 | The method of arbitrate valve position sensor redundancy and device |
| CN109416545A (en) * | 2016-07-11 | 2019-03-01 | 爱知制钢株式会社 | Magnetic mark detection system and magnetic mark detection method |
| US11119500B1 (en) | 2016-07-11 | 2021-09-14 | Aichi Steel Corporation | Magnetic marker detection system and magnetic marker detection method |
| CN109416545B (en) * | 2016-07-11 | 2022-02-22 | 爱知制钢株式会社 | Magnetic mark detection system and magnetic mark detection method |
| CN108732920A (en) * | 2017-04-19 | 2018-11-02 | 英飞凌科技股份有限公司 | Test collisions sensor device during vehicle operation |
| US11698631B2 (en) | 2017-04-19 | 2023-07-11 | Infineon Technologies Ag | Testing a crash sensor device during vehicle operation |
| CN108732920B (en) * | 2017-04-19 | 2023-11-21 | 英飞凌科技股份有限公司 | Testing crash sensor devices during vehicle operation |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1999003023A2 (en) | 1999-01-21 |
| WO1999003023A3 (en) | 1999-04-01 |
| EP0996874A2 (en) | 2000-05-03 |
| KR20010021584A (en) | 2001-03-15 |
| DE19730259C1 (en) | 1999-02-04 |
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