EP1842031A1 - Abtastverfahren für einen asynchronen sensor und zugehöriger asynchroner sensor - Google Patents
Abtastverfahren für einen asynchronen sensor und zugehöriger asynchroner sensorInfo
- Publication number
- EP1842031A1 EP1842031A1 EP05819152A EP05819152A EP1842031A1 EP 1842031 A1 EP1842031 A1 EP 1842031A1 EP 05819152 A EP05819152 A EP 05819152A EP 05819152 A EP05819152 A EP 05819152A EP 1842031 A1 EP1842031 A1 EP 1842031A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- output
- sensor
- rate
- output register
- parameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005070 sampling Methods 0.000 claims description 18
- 238000011156 evaluation Methods 0.000 description 5
- 230000002123 temporal effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
-
- 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
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
- G01D5/24414—Encoders having selectable interpolation factors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
Definitions
- the invention is based on a scanning method for an asynchronous sensor according to the preamble of independent claim 1 and of an associated asynchronous sensor according to the preamble of independent claim 6.
- Sensors for detecting and / or measuring physical quantities transmit them to a central computing or control unit.
- the digitization usually takes place synchronously by a sampling rate of the analog-to-digital converter of a central computing or control unit specified by the operating software.
- Digital sensors perform a digital transmission of the detected and / or measured physical quantities.
- the updating of the sensor data occurs in a different time range than the retrieval of the data from the system via a digital interface. Through this asynchronous sampling, a temporal blur (jitter) occurs, which reduces the signal quality.
- the sampling method according to the invention for an asynchronous sensor with the features of independent claim 1 and the associated asynchronous sensor having the features of independent claim 7 have the advantage that increases by programmable interpolation an output rate of sensor data and thus the jitter, ie the temporal blur , is reduced.
- the signal quality can advantageously be improved, thereby increasing the performance with respect to reducing the tripping times and improving accident detection, for example for personal protective equipment such as airbags, belt tensioners or roll bars.
- the programmable interpolation is implemented as a linear interpolation.
- linear interpolation for example, a difference of two samples is multiplied by the ratio of output rate to sampling rate, and the result of the multiplication is added to the old sample and stored in an output register.
- the linear interpolation enables a simple implementation of the teaching according to the invention.
- a required parameter is transmitted during an initialization phase, for example via a digital interface from a control unit to the output register.
- the required parameter can be advantageously changed as needed and is available at the beginning of a measurement.
- At least one value for the parameter for increasing the output rate may be stored in a memory in the output register, wherein the value of the parameter is set during the initialization phase by switching commands, which are transmitted by the control unit, for example via the digital interface to the output register.
- the scanning method then advantageously starts without transmitting a parameter value or a switching command directly in the mode "linear interpolation.” By transmitting a corresponding command, this mode can be switched off or changed as needed, for example to perform a characterization or analysis Applications that do not want linear interpolation.
- the set parameter can be locked in an advantageous manner during normal operation against programming. This will be a Programming or switching of the parameter between the output rates is prevented and the set parameter remains locked until the next initialization phase of the sensor.
- Figure 1 is a schematic block diagram of a sensor for a vehicle CRT
- Figure 2 is a schematic representation of a temporal blur in an asynchronous
- the updating of the sensor data occurs in a different time range than the retrieval of the data from the system via a digital interface. Due to this asynchronous sampling, a temporal blur (jitter) occurs which, depending on the algorithm used, can reduce the signal quality and thus the performance with regard to triggering times and crash discrimination.
- jitter a temporal blur
- the update of the sensor data by an applied clock signal or by an internal clock signal is set to a fixed value, which can not be changed in the rule.
- the improvement is limited by the selected measuring principle and / or by the process technology and by the hardware structure of the system.
- a central acceleration sensor has a sampling rate of 128us.
- a central evaluation unit retrieves the data at a rate of 500us.
- the maximum jitter of the signal data is therefore here 128us.
- a schematic representation of the jitter, i. the temporal blur, in an asynchronous sensor signal sampling is shown in Fig. 2.
- an output rate of an output register by a programmable interpolation of at least two samples.
- a programmable interpolation of at least two samples For implementation is in an initialization phase of the asynchronous sensor, for example, at a system start, - A -
- a real physical sampling rate of e.g. 128us is set, i. in a digital output register of the sensor, the data is updated every 128us.
- the sensor is placed in a mode by a corresponding command or default value in which the provision of the sensor signals in the digital output register is performed by interpolating two or more real samples, e.g. increased to lus or 0.5 ⁇ s.
- the performance in terms of tripping times and crash discrimination increases.
- FIG. 1 shows a schematic block diagram of an asynchronous sensor 1 for carrying out the scanning method according to the invention for a vehicle crash detection system.
- the sensor 1 comprises a sensor element 2 for detecting and / or measuring a physical quantity, which is read out at a sampling rate t 1, an analog / digital converter 3 and a digital low-pass filter 4. After the low-pass filter 4, the digital signal is converted into an output register 5 read digital interface.
- the output register 5 outputs the sensor data from the sensor element 2 to a control unit 6 at an output rate t2.
- the control unit 6 sends a parameter n for increasing the rate in the output register 5 by linear interpolation.
- the result of this calculation is calculated at the increased rate, e.g. l ⁇ s or 0.5 ⁇ s, added to the old sample and made available in the output register 5.
- the output register comprises a memory, not shown, in which at least one value for the parameter n for increasing the output rate t2 is stored.
- one of the stored values for the parameter n is activated by a switching command transmitted from the control unit 6 to the output register 5, i. by appropriate commands, a switching of the output rates can be performed.
- At least one parameter n is stored in the memory, not shown, of the output register 5 for increasing the output rate t2 as a default setting, which is loaded during the initialization phase.
- the sampling process starts, for example, directly in the mode "linear interpolation.”
- this mode can then be changed as needed or be turned off, for example, to perform a characterization or analysis, or for applications that do not want linear interpolation.
- the sensor 1 shown in Fig. 1 can be locked for safety reasons in normal operation, i. a programming or switching of the parameter n is no longer possible, so that the set parameter remains locked until the next initialization phase.
- the inventive scanning method and the associated asynchronous sensor can be dispensed with, for example in airbag control units, even when using "jitter-sensitive" algorithms to synchronize the sensor signals with the system clock of the central evaluation unit.
- the complex implementation of a synchronization is superfluous and the flexibility in selecting the evaluation concept for the sensor and the technology selection is increased.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Gyroscopes (AREA)
- Air Bags (AREA)
- Electronic Switches (AREA)
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005002721A DE102005002721A1 (de) | 2005-01-20 | 2005-01-20 | Abtastverfahren für einen asynchronen Sensor und zugehöriger asynchroner Sensor |
| PCT/EP2005/056572 WO2006076988A1 (de) | 2005-01-20 | 2005-12-07 | Abtastverfahren für einen asynchronen sensor und zugehöriger asynchroner sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1842031A1 true EP1842031A1 (de) | 2007-10-10 |
Family
ID=36284395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05819152A Ceased EP1842031A1 (de) | 2005-01-20 | 2005-12-07 | Abtastverfahren für einen asynchronen sensor und zugehöriger asynchroner sensor |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7930126B2 (de) |
| EP (1) | EP1842031A1 (de) |
| JP (1) | JP4605815B2 (de) |
| DE (1) | DE102005002721A1 (de) |
| WO (1) | WO2006076988A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109059992A (zh) * | 2018-10-26 | 2018-12-21 | 河北农业大学 | 一种禽舍环境传感器的在线监控系统及其监控方法 |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008031498B4 (de) * | 2008-07-03 | 2012-03-08 | Infineon Technologies Ag | Taktbestimmung eines Sensors |
| DE102007041847A1 (de) | 2007-09-03 | 2009-03-05 | Robert Bosch Gmbh | Steuergerät und Verfahren zur Ansteuerung von Personenschutzmitteln |
| DE102012203968A1 (de) * | 2012-03-14 | 2013-09-19 | Robert Bosch Gmbh | Mehrkanalige Sensoreinheit und zugehöriges Betriebsverfahren |
| JP2014222162A (ja) * | 2013-05-13 | 2014-11-27 | 株式会社デンソー | センサ回路及びセンサ |
| CN110750752B (zh) * | 2019-09-10 | 2023-12-05 | 许昌许继软件技术有限公司 | 一种模拟量数据的插值方法及装置 |
| US20240127948A1 (en) * | 2021-04-22 | 2024-04-18 | Sony Group Corporation | Patient monitoring system |
| US12061937B2 (en) * | 2022-06-22 | 2024-08-13 | Allegro Microsystems, Llc | Methods and apparatus for sensor data consistency |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09273942A (ja) | 1996-02-05 | 1997-10-21 | Aisin Seiki Co Ltd | センサ出力補間方法 |
| JP3490865B2 (ja) | 1996-05-24 | 2004-01-26 | ペンタックス株式会社 | 電子内視鏡 |
| US6259084B1 (en) * | 1999-09-02 | 2001-07-10 | Hewlett Packard Company | System and method for improved scanning accuracy through noise reduction and pulse timing |
| US7222358B2 (en) * | 1999-12-13 | 2007-05-22 | Finisar Corporation | Cable television return link system with high data-rate side-band communication channels |
| DE10054070A1 (de) * | 2000-10-31 | 2002-05-08 | Heidenhain Gmbh Dr Johannes | Positionsmeßgerät und Verfahren zur Bestimmung einer Position |
| JP3773817B2 (ja) | 2001-07-13 | 2006-05-10 | 三洋電機株式会社 | ノイズキャンセラ |
-
2005
- 2005-01-20 DE DE102005002721A patent/DE102005002721A1/de not_active Withdrawn
- 2005-12-07 JP JP2007551568A patent/JP4605815B2/ja not_active Expired - Fee Related
- 2005-12-07 US US11/795,723 patent/US7930126B2/en not_active Expired - Fee Related
- 2005-12-07 WO PCT/EP2005/056572 patent/WO2006076988A1/de not_active Ceased
- 2005-12-07 EP EP05819152A patent/EP1842031A1/de not_active Ceased
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2006076988A1 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109059992A (zh) * | 2018-10-26 | 2018-12-21 | 河北农业大学 | 一种禽舍环境传感器的在线监控系统及其监控方法 |
| CN109059992B (zh) * | 2018-10-26 | 2020-06-26 | 河北农业大学 | 一种禽舍环境传感器的在线监控系统及其监控方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20090125278A1 (en) | 2009-05-14 |
| DE102005002721A1 (de) | 2006-08-03 |
| WO2006076988A1 (de) | 2006-07-27 |
| US7930126B2 (en) | 2011-04-19 |
| JP4605815B2 (ja) | 2011-01-05 |
| JP2008529328A (ja) | 2008-07-31 |
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Owner name: ROBERT BOSCH GMBH |