[go: up one dir, main page]

WO2018171281A1 - Convertisseur analogique-numérique et automobile - Google Patents

Convertisseur analogique-numérique et automobile Download PDF

Info

Publication number
WO2018171281A1
WO2018171281A1 PCT/CN2017/119263 CN2017119263W WO2018171281A1 WO 2018171281 A1 WO2018171281 A1 WO 2018171281A1 CN 2017119263 W CN2017119263 W CN 2017119263W WO 2018171281 A1 WO2018171281 A1 WO 2018171281A1
Authority
WO
WIPO (PCT)
Prior art keywords
digital signal
signal
digital
analog
output
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
Application number
PCT/CN2017/119263
Other languages
English (en)
Chinese (zh)
Inventor
曹文锋
代康伟
余军
闫立国
张诚龙
郭志强
于海龙
佟世蒙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Electric Vehicle Co Ltd
Original Assignee
Beijing Electric Vehicle Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beijing Electric Vehicle Co Ltd filed Critical Beijing Electric Vehicle Co Ltd
Publication of WO2018171281A1 publication Critical patent/WO2018171281A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters
    • H03M1/0617—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by the use of methods or means not specific to a particular type of detrimental influence
    • H03M1/0675—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by the use of methods or means not specific to a particular type of detrimental influence using redundancy

Definitions

  • the present disclosure relates to the field of analog-to-digital conversion technologies, and in particular, to an analog-to-digital converter and an automobile.
  • Analog-to-Digital Converter is the key input module of the controller.
  • the correctness of the data collected by the ADC of the analog-to-digital converter directly affects the security of the control system. It is also the focus of functional safety.
  • Functional safety ISO 26262 standard has strict detection requirements for analog-to-digital converter ADC stuck, drift, oscillation, short-circuit between signal lines, etc.
  • Traditional analog-to-digital converter ADC acquisition does not consider hardware failure, software Data validity is usually only filtered, so when the ADC of the analog-to-digital converter fails, the system will use invalid data for calculation, and it is very likely that a security incident will occur.
  • the technical problem to be solved by the embodiments of the present disclosure is to provide an analog-to-digital converter and a vehicle, which are used to increase the reference group to collect the same signal for comparison by redundant design, thereby reducing the possibility of damage caused by hardware failure.
  • an analog-to-digital converter including: a first conversion circuit, configured to convert a sensor voltage signal input by the first input terminal into a first digital signal, and output through the first output terminal; a second conversion circuit, configured to convert a sensor voltage signal input by the second input terminal into a second digital signal, and output through the second output end; wherein the first input end is connected to the second input end; a control unit, respectively acquiring a first digital signal output by the first output end and a second digital signal output by the second output end, for using a voltage value represented by the first digital signal and the second digital When the absolute value of the difference of the voltage values indicated by the signal is greater than or equal to the first preset value, the first preset fault signal is output.
  • the first conversion circuit is further configured to convert a reference voltage signal input by the third input terminal into a third digital signal and output through the third output terminal;
  • the second conversion circuit is further configured to The reference voltage signal input by the fourth input terminal is converted into a fourth digital signal and output through the fourth output terminal, wherein the third input terminal is connected to the fourth input terminal;
  • the control unit is further used for And outputting a second preset fault signal when an absolute value of a difference between the voltage value represented by the third digital signal and the voltage value indicated by the fourth digital signal is greater than or equal to a second preset value.
  • control unit is further configured to: when an absolute value of a difference between the voltage value represented by the first digital signal and the voltage value represented by the second digital signal is less than a first preset value, and Outputting the first digital signal as a mode of the sensor voltage signal when an absolute value of a difference between a voltage value represented by the third digital signal and a voltage value represented by the fourth digital signal is less than a second predetermined value Number conversion result signal.
  • the analog to digital converter further includes: a first storage unit respectively connected to the first output end and the third output end, the first storage unit is configured to store the first storage unit a digital signal and the third digital signal.
  • control unit is coupled to the first storage unit and acquires the first digital signal and the third number stored in the first storage unit by the first storage unit signal.
  • the analog to digital converter further includes: a second storage unit respectively connected to the second output end and the fourth output end, the second storage unit configured to store the second a digital signal and the fourth digital signal.
  • control unit is coupled to the second storage unit and acquires the third digital signal and the fourth number stored in the second storage unit by the second storage unit signal.
  • the first predetermined value ranges from 0.8% of the range of the sensor that inputs the sensor voltage signal to 1.2% of the range of the sensor.
  • the second preset value ranges from 0.8% of the voltage value of the reference voltage to 1.2% of the voltage value of the reference voltage.
  • Embodiments of the present disclosure also provide an automobile including an analog to digital converter as described above.
  • an analog-to-digital converter and an automobile provided by the embodiments of the present disclosure have at least the following beneficial effects: the embodiment of the present disclosure adds a conversion circuit as a reference group by redundant design, and compares by collecting the same signal. Analysis prevents the conversion circuit used for output from being faulty due to faults, etc., reducing the possibility of damage due to hardware failure. At the same time, the embodiment of the present disclosure can also add a reference voltage, separately collect and convert the reference voltage signal and compare to prevent the output digital signal from being wrong due to the error of the reference voltage collection, thereby further reducing the damage caused by the hardware failure failure. possibility.
  • FIG. 1 is a schematic structural diagram of an analog-to-digital converter according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of an analog to digital converter according to an embodiment of the present disclosure.
  • an embodiment of the present disclosure provides an analog-to-digital converter, including: a first conversion circuit 1 configured to convert a sensor voltage signal input by a first input terminal into a first digital signal, and pass the An output terminal is configured to convert the sensor voltage signal input by the second input terminal into a second digital signal and output the second output terminal; wherein the first input end and the first The two input terminals are connected; the control unit 3 respectively obtains the first digital signal output by the first output end and the second digital signal output by the second output end, for the voltage represented by the first digital signal When the absolute value of the difference between the value and the voltage value indicated by the second digital signal is greater than or equal to the first preset value, the first preset fault signal is output.
  • the second conversion circuit is added as a reference comparison group, and the first conversion circuit and the second conversion circuit simultaneously receive the voltage signal output by the sensor and convert it into a digital signal, and the control unit will pair the first conversion circuit. Comparing the voltage value indicated by the outputted first digital signal with the voltage value represented by the second digital signal output by the second conversion circuit, when the absolute value of the difference between the two is greater than or equal to the first preset value (according to the experiment Calibration is performed), at this time, the voltage values collected by the two are quite different (beyond the allowable error range), the first conversion circuit or the second conversion circuit may be faulty, and the voltage signal collected at this time is not accurate, if the output is wrong The voltage signal can cause subsequent control errors and cause danger. Therefore, at this time, the control unit outputs a first failure signal to notify other components or the upper control unit analog-to-digital converter ADC to malfunction.
  • the embodiment of the present disclosure adds a conversion circuit as a reference group, and compares and analyzes by collecting the same signal, thereby preventing the conversion circuit for output from being faulty due to failure, and reducing the possibility of damage caused by hardware failure.
  • the comparison group added by the embodiment of the present disclosure is a separate conversion circuit, which avoids the common cause failure.
  • analog-to-digital converter of the embodiment of the present disclosure is not limited to analog-to-digital conversion by using a conversion circuit, and other conversion methods are also possible.
  • the first conversion circuit 1 is further configured to convert a reference voltage signal input by the third input terminal into a third digital signal, and pass through the third output end.
  • the second conversion circuit 2 is further configured to convert the reference voltage signal input by the fourth input terminal into a fourth digital signal, and output through the fourth output end, wherein the third input end and the fourth
  • the control unit 3 is further configured to: when an absolute value of a difference between a voltage value represented by the third digital signal and a voltage value represented by the fourth digital signal is greater than or equal to a second preset value When the second preset fault signal is output.
  • the analog-to-digital converter converts the collected voltage signal into a digital signal, which needs to be performed according to the reference voltage. At this time, if the reference voltage is collected incorrectly, the voltage value represented by the digital signal after the analog-to-digital conversion is not collected. The voltage value will cause subsequent use, control errors and cause danger. Therefore, in the embodiment of the present disclosure, the first conversion circuit and the second conversion circuit are also used to simultaneously collect a provided reference voltage, wherein the voltage provided by the reference voltage source is known, for example, providing a reference voltage of 2.5V.
  • the first conversion circuit and the second conversion circuit simultaneously collect the reference voltage, and when the control unit determines that the error of the two is within the allowable range, it can be determined that the acquisition reference voltage is correct.
  • the second preset fault signal is output to inform the other The component or upper control component analog-to-digital converter ADC has failed and the current fault has failed for the acquisition reference voltage.
  • a reference voltage is added, and the reference voltage signal is separately collected, converted, and compared to prevent an error in the output of the reference voltage due to a fault in the acquisition of the reference voltage, thereby further reducing the possibility of damage due to hardware failure.
  • the control unit 3 is further configured to: when an absolute value of a difference between a voltage value represented by the first digital signal and a voltage value represented by the second digital signal is less than a first preset value, and the Outputting the first digital signal as an analog-to-digital conversion result of the sensor voltage signal when an absolute value of a difference between a voltage value represented by the three digital signals and a voltage value represented by the fourth digital signal is less than a second predetermined value signal.
  • the first conversion circuit and the second conversion circuit for the sensor voltage and the voltage signal collected by the reference voltage are within the error tolerance range, it can be determined that the first conversion circuit has not failed, and the first conversion can be performed at this time.
  • the digital signal output after circuit conversion is used by other components.
  • the analog-to-digital converter further includes: a first storage unit 4 respectively connected to the first output end and the third output end, The first storage unit 4 is configured to store the first digital signal and the third digital signal.
  • the control unit 3 is connected to the first storage unit 4, and acquires the first digital signal and the third number stored in the first storage unit 4 through the first storage unit 4. signal.
  • the analog to digital converter further includes: a second storage unit 5 connected to the second output end and the fourth output end, respectively, the second storage unit 5 is configured to store the a second digital signal and the fourth digital signal.
  • the control unit 3 is connected to the second storage unit 5, and acquires the third digital signal and the fourth number stored in the second storage unit 5 through the second storage unit 5. signal.
  • the storage unit is further configured to store the digital signals converted by the first conversion circuit and the second conversion circuit, and the control unit may directly connect with the first storage unit and the second storage unit and call the internal storage thereof.
  • Digital signal data At the same time, when the control unit determines that the first conversion circuit has not failed (ie, the two sets of voltage acquisition are within the error tolerance range), no fault signal is generated to the outside, and the external device can be connected to the first storage unit at this time, and The first digital signal stored by the first storage unit is directly called when needed (the remaining digital signals are used for comparison. In the embodiment, when the fault is not sent, that is, when the analog-to-digital converter is normal, only the first conversion circuit is used. Digital signal after converting the sensor voltage).
  • the memory cells shown in the drawings are all independent of the conversion circuit. This is only one embodiment of the present disclosure. In another embodiment of the present disclosure, the memory cells shown may also be disposed in the conversion circuit. Internally, and not limited to circuit conversion, it may also be internal to the memory cell setting and conversion module (this is the same function as the conversion circuit described above for converting a voltage signal into a digital signal).
  • the first preset value ranges from 0.8% of the range of the sensor that inputs the sensor voltage signal to 1.2% of the range of the sensor.
  • the second preset value ranges from 0.8% of the voltage value of the reference voltage to 1.2% of the voltage value of the reference voltage.
  • a reference embodiment is provided for the range of values of the first preset value and the second preset value.
  • the first preset value is preferably 1% of the range of the sensor, that is, when the difference between the voltage values collected by the two channels is within 1% of the range of the sensor, the error of the acquisition may be considered as permitted.
  • the conversion circuit is working properly.
  • the second preset value is preferably 1% of the voltage value of the reference voltage, that is, when the difference between the two collected reference voltage values is within 1% of the voltage value of the reference voltage, the error of the acquisition may be considered to be within an allowable range. At this point, the conversion circuit works normally.
  • the above is the failure and the result that may occur when the existing analog-to-digital speed is obtained.
  • the analog-to-digital converter of the embodiment of the present disclosure can detect the failure of the conversion circuit (conversion module) when the above-mentioned failure occurs, that is, the first conversion circuit occurs. In the above fault, by comparing and analyzing the voltage values collected by the second conversion circuit, it is found that the first conversion circuit generates a failure, thereby avoiding safety problems caused by the use of erroneous data.
  • Embodiments of the present disclosure provide an automobile including an analog to digital converter as described above.
  • the embodiment of the present disclosure increases the conversion circuit as a reference group by using redundant design, and compares and analyzes the same signal to prevent the conversion circuit for output from being faulty due to faults, and reduces the damage caused by hardware failure.
  • the embodiment of the present disclosure can also add a reference voltage, separately collect and convert the reference voltage signal and compare to prevent the output digital signal from being wrong due to the error of the reference voltage collection, thereby further reducing the damage caused by the hardware failure failure. possibility.

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

L'invention concerne un convertisseur analogique-numérique et une automobile, le convertisseur analogique-numérique comprenant : un premier circuit de conversion, qui est utilisé pour convertir un signal de tension de capteur fourni en entrée par une première extrémité d'entrée en un premier signal numérique et pour le délivrer au moyen d'une première extrémité de sortie ; un second circuit de conversion, qui est utilisé pour convertir un signal de tension de capteur fourni en entrée par une seconde extrémité d'entrée en un second signal numérique et pour le délivrer au moyen d'une seconde extrémité de sortie, la première extrémité d'entrée étant connectée à la seconde extrémité d'entrée ; et une unité de commande, qui acquiert respectivement le premier signal numérique délivré par la première extrémité de sortie et le second signal numérique délivré par la seconde extrémité de sortie, et qui est utilisée pour fournir en sortie un signal de défaut prédéfini lorsqu'une valeur absolue de la différence entre une valeur de tension représentée par le premier signal numérique et une valeur de tension représentée par le second signal numérique est supérieure ou égale à une première valeur prédéfinie.
PCT/CN2017/119263 2017-03-22 2017-12-28 Convertisseur analogique-numérique et automobile Ceased WO2018171281A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710172851.8A CN106961279A (zh) 2017-03-22 2017-03-22 一种模数转换器及汽车
CN201710172851.8 2017-03-22

Publications (1)

Publication Number Publication Date
WO2018171281A1 true WO2018171281A1 (fr) 2018-09-27

Family

ID=59471386

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/119263 Ceased WO2018171281A1 (fr) 2017-03-22 2017-12-28 Convertisseur analogique-numérique et automobile

Country Status (2)

Country Link
CN (1) CN106961279A (fr)
WO (1) WO2018171281A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106961279A (zh) * 2017-03-22 2017-07-18 北京新能源汽车股份有限公司 一种模数转换器及汽车
CN108152558A (zh) * 2017-11-23 2018-06-12 北京新能源汽车股份有限公司 一种电流采样系统和电动汽车
CN108501757B (zh) * 2018-04-27 2021-03-02 北京新能源汽车股份有限公司 一种电池管理系统、电流采样方法、装置及电动汽车
CN109752593B (zh) * 2019-01-18 2024-07-12 钜泉光电科技(上海)股份有限公司 检测系统和电能计量芯片及其设备
CN110501559B (zh) * 2019-08-27 2021-11-09 杭州和利时自动化有限公司 一种电流采集装置
CN112880800A (zh) * 2021-03-25 2021-06-01 梅特勒-托利多(常州)精密仪器有限公司 具有冗余设计的数字称重传感器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101640538A (zh) * 2008-08-01 2010-02-03 扬智科技股份有限公司 模拟数字转换器
US20100164762A1 (en) * 2008-12-29 2010-07-01 Ramyanshu Datta Methods and apparatus to test and compensate multi-channel digital-to-analog converters
US20160329904A1 (en) * 2015-05-07 2016-11-10 Texas Instruments Incorporated Diagnostic monitoring for analog-to-digital converters
CN106961279A (zh) * 2017-03-22 2017-07-18 北京新能源汽车股份有限公司 一种模数转换器及汽车

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105547523A (zh) * 2014-10-29 2016-05-04 上海辰竹仪表有限公司 一功能安全型hart测量系统
CN105425093B (zh) * 2015-11-24 2018-02-09 福州大学 一种基于电压检测的短路故障早期辨识方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101640538A (zh) * 2008-08-01 2010-02-03 扬智科技股份有限公司 模拟数字转换器
US20100164762A1 (en) * 2008-12-29 2010-07-01 Ramyanshu Datta Methods and apparatus to test and compensate multi-channel digital-to-analog converters
US20160329904A1 (en) * 2015-05-07 2016-11-10 Texas Instruments Incorporated Diagnostic monitoring for analog-to-digital converters
CN106961279A (zh) * 2017-03-22 2017-07-18 北京新能源汽车股份有限公司 一种模数转换器及汽车

Also Published As

Publication number Publication date
CN106961279A (zh) 2017-07-18

Similar Documents

Publication Publication Date Title
WO2018171281A1 (fr) Convertisseur analogique-numérique et automobile
US11733279B2 (en) Circuit and method for detecting insulation resistance
JP4296811B2 (ja) 物理量センサ装置
CN103901772B (zh) 双dsp冗余惯性平台控制器
US9372774B2 (en) Redundant computing architecture
US8131507B2 (en) Sensor apparatus
EP1602991A1 (fr) Procédé de détection d'anomalies d'un convertisseur résolveur-numérique
US7719255B2 (en) Safe input circuit with one-channel peripheral connection for the input of a bus participant
CN108844644A (zh) 一种电池温度采样系统及汽车
US9804575B2 (en) Multiplex control device
CN102375775B (zh) 一种具有检测系统不可恢复错误指示信号的计算机系统
US8055404B2 (en) Sensor apparatus
US8131508B2 (en) Sensor apparatus
CN108107378A (zh) 用于功率模块的诊断电路与方法
CN112285540B (zh) 一种输入采集控制检测方法及输入采集控制检测电路
WO2019029479A1 (fr) Circuit de détection de commutateur numérique et procédé
CN118075312A (zh) 车载SerDes芯片、包括其的车载数据传输系统及车辆
KR20220050094A (ko) 순간 전압 강하 감지 회로 및 차량 탑재 진단 시스템
CN116896381A (zh) 半导体装置以及故障检测方法
CN109728816A (zh) 一种adc状态检测系统
EP1337043A2 (fr) Détection de défaillance d'une fonction de conversion analogique-numérique dans un micro-ordinateur
CN118591779A (zh) 用于失效运行传感器的决策单元
JP2008312327A (ja) ディジタル保護継電装置のアナログ入力回路
CN112072699A (zh) 光伏逆变器及其控制方法
CN220924038U (zh) 角雷达通讯控制电路及车辆控制系统

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17901637

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17901637

Country of ref document: EP

Kind code of ref document: A1