TOYOTA ENGINEERING STANDARD丰田工程标准TSC7048G

1、TOYOTA ENGINEERING STANDARDNO.:TSC7048GTITLE:Bench test method for human exposure to electric and electronic equipment for vehicleCLASS:C1Established:/Revised:Rev.1 (Jan. 2020)This standard has been revised as a result of the following changes because Chinese regulations and China rating standard we

2、re newly established:recommended device for the pre-operation inspection has been added (Section4.6); andmeasuring instrument setting and the measurement method for the frequency range evaluation method have been reviewed (Sections 5.13 and 5.1.4).Prepared and Written by Electronic Performance Devel

3、opment &Engineering Dept.Electronics Control System Development Div.Design Quality Innovation Dept.TOYOTA MOTOR CORPORATIONBench test method for human exposure to electric and electronic equipmentfor vehicleScopeThis standard covers the test bench for measuring the magnetic field intensity and magne

4、tic flux density in a frequency range of 10 Hz to 400 kHz among the electromagnetic waves occurring from the electric and electronic components for vehicles. The purpose is to evaluate the influence of the electromagnetic waves occurring from the electric and electronic components for vehicles on th

5、e human body (human exposure).DefinitionsThe main terms used in this standard are shown below.Human exposureThe human exposure refers to the state where the human body is exposed to the electromagneticwaves.Electric and electronic component for vehicleThe electric and electronic component for vehicl

6、e refers to the devices that control the systems mainly using the semiconductors, various detection deyices (sensors, etc.) that are used in combination with those devices, output devices (motors, actuators, electric heating wires, etc.), and the like.Also, if refers to the devices that include any

7、of these devices.Time domain evaluation methodThis evaluation method refers t6 the method specified in Section 5.5.2 of I EC 62233.Frequency range evaluation method (line spectrum evaluation)This evaluation method refers to the method specified in Section 5.5.3 of IEC 62233.Weighed measurement resul

8、tThe weighted measurement result refers to the final result of measurement into which the reference level depending on the frequency is incorporated. It shall conform to the equation (5) in Section 5.5.3 of IEC 62233.Reference levelThe reference level refers to the magnetic field level that is deriv

9、ed from the basic restrictions by assuming the worst exposure conditions (example: exposure to uniform magnetic field). It shall conform to the ICNIRP guidelines.Basic restrictionThie basic restriction refers to the restrictions that include a constant safety factor for the human exposufe to the tim

10、e-varying electric field, magnetic field, and electromagnetic field based on the established biological influences. It shall conform to the ICNIRP guidelines.Exposure of general publicThe exposure of general public refers to all exposures to the electromagnetic field that are applied to the general

11、public.lest specimenThe test specimen refers to the equipment that is provided for the test. The test specimen is composed of the electric and electronic components for vehicle.Ground planeThe ground plane refers to the conductive metal plates that are placed under the test specimens, loads, simulat

12、ors, or batteries. The ground plane is used as reference potential to simulate the vehicle body.AN (Artificial Network)The AN refers to the line impedance stabilizing network. AN that is specified in CISPR 25.Measurement ItemsThe measurement methods specified in this TS shall conform to the followin

13、gs.Time domain evaluation methodThis method shall conform to the time domain evaluation specified in Section 5.5.2 of IEC 62233.The exposure of general public in ICNIRP 1998 shall be applicable.Frequency range evaluation methodThis method shall conform to the line spectrum evaluation specified in Se

14、ction 5.5.3 of IEC 62233.The exposure of general public in ICNIRP 1998 shall be applicable.Items Common to Both Measurement MethodsFrequency RangeThe measurement frequency range shall be 10 Hz to 400 kHz. If it is impossible to cover this frequency range by a single measurement, add the weighted mea

15、surement result in each measurement frequency range.Magnetic Field Measuring InstrumentUse of the following measuring instrument is recommended. However, other measuring instrument may be used provided that it meets the requirements in Section 4.3.Manufacturer: Narda S.T.S Type: ELT-400Items Require

16、d for Magnetic Field Measuring InstrumentThe magnetic field sensor shall be composed of 3 coils and shall have the measurement area of 100+5 cm2 with the axes orthogonal to each other in order to obtain the isotropic sensitivity.The outer diameter shall not exceed 13 cm.The other size may be used if

17、 the performance equivalent to this magnetic field sensor can be secured. A single direction sensor (not isotropic) may be used in combination with an appropriate addition method.The magnetic field measuring instrument to be used in this standard shall be able to measure the items specified in Secti

18、ons 5.5.2 and 5.5.3 of IEC 62233.The internal noise level of the magnetic field measuring instrument shall be 5 % or less by the time domain evaluation method. And also, the internal noise level shall be lower than the threshold limit of the frequency range evaluation method by 10 dB or more.The res

19、ponse time (the time to reach 90 % of a final value) of the magnetic field measuring instrument shall not exceed 1 s.The magnetic flux density shall be determined by averaging the values in 1 s.The exposure of general public in ICNIRP 1998 shall be applicable.Precautions to Be Taken during Measureme

20、ntWhen measuring magnetic fields, conform to the following basic precautions.Evaluate the measured signals in relation to their frequency. In consideration of 2 or more independent magnetic field sources, adopt the largest measured value.Do not measure a magnetic field whose intensity is less than t

21、he maximum internal noise level.When conducting the final measurement for conformity judgment, fix the magnetic field sensor.The background noise of the measurement environment shall be 5 % or less by the time domain evaluation method. And also, the background noise shall be lower than the threshold

22、 limit of the frequency range evaluation method by 10 dB or more.Items Required for Test SpecimenUnless otherwise clearly specified in Section 5, set the test specimen in accordance with the following method. However, when there are reasons for difficulties in setting, the setting method may be chan

23、ged after obtaining the agreement between the departments concerned (engineering design department and evaluation department).Operating Conditions for Test SpecimenOperate the test specimen and loads under the conditions equivalent to the conditions for the vehicle installation state, and drive them

24、 all the time during the measurement. When there are multiple operating conditions, the operating conditions may be determined by narrowing down to the conditions that maximize the electromagnetic waves occurring from the test specimen or harness.Operate the test specimen at an ambient temperature o

25、f 25+10 C. However, when there are operating conditions tht maximize the electromagnetic waves at an ambient temperature other than 25+10 C, conduct the test under that conditions. When there are reasons for difficulties in ambient temperature setting, the setting method may be changed after obtaini

26、ng the agreement between thedepartments concerned (engineering design department and evaluation department).Connection of LoadConduct the test by connecting all actual loads in the same manner as the vehicle installation state.In unavoidable circumstances, connect the dummy loads or simulators. When

27、 dummy loads or simulators are used, they shall be composed of the circuits that have the impedance characteristics equivalent to the .actual loads.Connection of HarnessConduct the test by connecting the harnesses whose wire types and wire diameters are equivalent to those of the harnesses installed

28、 in the vehicle. For both power line and load line, the overall length of the harness shall be 1700+300/-0 mm and all harnesses shall be bundled.GroundingThe grounding for the test specimen and loads to be used shall be made equivalent to those in the vehicle installation state. When it is required

29、to use a ground line in unavoidable circumstances, set the wire length to 300+ 100 mm and wire diameter to 5 sq.Height of Test Specimen and HarnessPlace the test specimen and harnesses at 50+5 mm above the ground plane. They shall be placed on non-conductive materials with low relative permittivity

30、such as foam styrol. However, when the test specimen and harnesses are grounded to the frames (vehicle body) in the vehicle installation state, they may be set in that state.Ground PlaneThe ground plane refers to the conductive metal plates that are placed under the test specimens, loads, simulators

31、, or batteries. The ground plane is used as reference potential to simulate the vehicle body. The metal plate shall be made of copper, brass, or aluminum, and shall have the dimensions of 0.5 mm or more thickness and 1000 x 2000 mm or more area, However, when there are only resin materials and no me

32、tal ground is provided for the applicable eleetric and electronic components in the vehicle installation state, the ground plane shatt not be used. For grounding in this case, connect the components to the negative terminal of the battery or the like under the conditions equivalent to the conditions

33、 for the vehicle installation state When there is a difference in the presence of the ground depending on theinstallation vehicles, the test may be conducted only under the conditions where the ground plane is not used)Calibration of Magnetic Field Measuring InistrumentThe calibrated magnetic field

34、measuring instrument shall be used. The issuance of the calibration certificate and traceability certificate conforming to ISO 17025 is required, and the validity period shall be 1 year or less from the issuance.In addition, conduct the preoperation inspection before the measurement, and clearly des

35、cribe the results in the test report that there is no abnormality in the magnetic field measuring instrument. In the preoperation inspection, it is sufficjent to generate a known magnetic field signal and confirm with the received signal that there is no failure in the magnetic field measuring instr

36、ument, cable, and connectorThe method should be arbitrary. Use of the following device is recommended for the pre-operation inspection.Manufacturer: Eiden Co., Ltd.Type: 7904A-SC1Contents to Be Prepared before Starting TestBefore starting the test, study the following on the test specimen, and descr

37、ibe the results in the planning sheet. For the study, have sufficient discussions between the parties concerned.Identification of new points and change pointsldentify new points and change points in each level of the vehicle, system, and component.Examination of operating conditions for test specime

38、n by DR, FTA (Fault Tree Analysis), FMEA (Failure Mode and Effects Analysis), and the likeldentify the conditions that maximize the electromagnetic waves occurring from the test specimen by DR, FTA, FMEA, and the like.Examination of operating conditions for test specimen by DRBFMFor the change point

39、s identified in (1), identify the conditions that maximize the electromagnetic wavesoccurring from the test specimen.Submission of Planning SheetCreate and submit the report after the measurement. Table 2 shows the items specified for the report. These items to be described in the report shall be ag

40、reed between the departments concerned (engineering design department and evaluation department) in advance. The discussed contents and determined items that are not described shall be invalid.Create and submit the planning sheet before the measurement. Table 1 shows the items specified for the plan

41、ning sheet. These items and contents to be described in the planning sheet shall be agreed between the departments concerned (engineering design department and evaluation department) in advance. The discussed contents and determined items that are not described shall be invalid.Create and submit the

42、 report after the measurement. Table 2 shows the items specified for the report. These items to be described in the report shall be agreed between the departments concerned (engineering design department and evaluation department) in advance. The discussed contents and determined items that are not

43、described shall be invalid.Items to be describedRemarks(reference)1Name of test specimen2Installation position of test specimen3Operating conditions for test specimen4.5.14Load to be ued4.5.25Harness to be ued4.5.36Grounding4.5.47Contents to be prepared beforestarting te$t4.78Tet layout59Magnetic fi

44、eld measuring instrumentto be used4.2 ； 4.310Copy of catibration certificate4.611Threshold limlit to be adoptedTSC7048G-1Table 1:ltems to Be Described inng Sheet4.9 Submission of ReportTable 2: Items to Be Described in ReportItems to be describedRemarks(reference)1Contents described in planning shee

45、t4.82Change point from planning sheet3Identification number of test specimen4Measurement date5Person conducting measurement6Measurement resultSection 57Criteria and judgment8Evidence data9Photo of measurement sceneMeasurement MethodSetting Method for Measuring InstrumentAll measurement methods not s

46、pecified in Section 5 shall conform to I EC 62233Setting of Measuring Instrument for Time Domain Evaluation Method Set the magnetic field measuring instrument as follows.Measurement mode: EXPOSURE STD 1998 Gen. Pub.RANGE: LowLOW CUT: 10 HzMAX HOLD: MAXDETECT: RMSMeasurement Method for Time Domain Ev

47、aluation MethodConduct the measurement for 1 s or more in each measurement position specified in Section 5.2 and later, and record the maximum value.Setting of Measuring Instrument for Frequency Range Evaluation Method(1) Set the magnetic field measuring instrument as follows.Measurement mode: 320 p

48、T of Field StrengthRANGE:LowLOW CUT: 10 HzMAX HOLD: MAXDETECT: Peak(2) For the frequency range evaluation method, use of the following measuring system or a digital oscilloscope is recommended.Manufacturer Eiden Co., Ltd.Type: 7904A-201When a digital oscilloscope is used, connect the analog output l

49、ines in each of 3 axes (X/Y/Z) from the magnetic field measuring instrument to each channel (CH1/CH2/CH3) of the digital oscilloscope.Measurement Method for Frequency Range Evaluation MethodConduct the measurement in each measurement position specified in Section 5.2 and later. Conduct the Fourier t

50、ransformation of the analog output in each of 3 axes (X/Y/Z) of the magnetic field measuring instrument, and conduct vector synthesis on the measurement data in each of 3 axes (X/YIZ). Indicate the vertical axis with the magnetic field intensity, and indicate the horizontal axis with a frequency ran

51、ge of 10 Hz to 400 kH乙 An example of setting for Fourier transformation in the frequency range evaluation method is shown in Table 3.In addition, the frequency resolution for indication with a frequency range of 10 Hz to 400 kHz is shown in Table 4.MethodItems for Fourier transformationValueSampling

52、 frequency1 MHzNumber of pointsMethodItems for Fourier transformationValueSampling frequency1 MHzNumber of points1048576Frequenqy resolution0.954HzDynamic range (vertical axis)10 bits or moreAmplitude processingMax. value (Peak)Table 4: Frequency Resolution in Fregueney Range Evauation MethodFreguen

53、cy rangeFrequency interval10 to 5000 Hz1 Hz5005 to 50000 Hz5 Hz50050 to 400000 Hz50 Hz5.2 Measurement Structure for Low Voltage SystemFor the low voltage systems including the test specimen whose drive voltage is lowerthan 60 V, measure the magnetic field intensity or magnetic flux density in a freq

54、uency range of 10 Hz to 400 kHz radiated from the test specimen and harnesses (power line and load line).Fig. 1 shows the measurement structure. At first, when conducting the measurement on the test specimen, position the magnetic field sensor above the test specimen as shown in Fig. 2 On all 6 surf

55、aces of the test specimen, measure the worst positions by sweeping or searching on each surface. However, the surfaces that are grounded to the frames (vehicle body) in the vehicle installation state may be omitted. On the other hand, when conducting the measurement on the harnesses, position the ma

56、gnetic field sensor above the bundled harnesses as shown in Fig. 3. Use the magnetic field sensor to measure the worst positions by sweeping or searching in the measurement portion of the harnesses (1500+75 mm). The distance a in Figs.2 and 3 shall foltow Table 5.Set the length of the measurement po

57、rtion of the harnesses to 1500+75 mm for both power line and load line.Fig. 1 Example of Measurement Structure for Low Voltage SystemRemark:1: Test specimen2: Load and simulator3: Battery4: Power line5: Load line6: Dielectrics such as foam styrol7: Ground plane8: GroundingFig. 2 Position of Magnetic

58、 Field Sensor with Respect to Test SpecimenRemark: 1: Test specimenFig. 2 Position of Magnetic Field Sensor with Respect to Test Specimen4: Power line5: Load line6: Dielectrics such asi foam styrol7: Ground plane9: Magnetic field sensorTable 5 Distance of Magnetic Field SensorDistance from end surfa

59、ce of test specimen or harness to end surface ofmagnetic field sensor a (mm)When installation position of applicable electric and electronic components is near seat (including head restraint)(1)0Electric and electronic components other than above0However, the distance may be specified as the shortes

60、t distance of physical approach by the human body in the vehicle installation state.Note (1): The applicable electric and electronic components are those installed between the seat (above, inside, or below the seat) and floor.Example of (1): Seat heater, seat ECU, seat air conditioner ECU, seat vibr