Product Code:SAE J1750
Title:Describing and Evaluating the Truck Driver's Viewing Environment
Issuing Committee:Truck And Bus Human Factors Committee
Scope:This SAE Recommended Practice establishes three alternate methods for describing and evaluating the truck driver'sviewing environment: the Target Evaluation, the Polar Plot and the Horizontal Planar Projection. The Target Evaluationdescribes the field of view volume around a vehicle, allowing for ray projections, or other geometrically accuratesimulations, that demonstrate areas visible or non-visible to the driver. The Target Evaluation method may also beconducted manually, with appropriate physical layouts, in lieu of CAD methods. The Polar Plot presents the entireavailable field of view in an angular format, onto which items of interest may be plotted, whereas the Horizontal PlanarProjection presents the field of view at a given elevation chosen for evaluation.These methods are based on the Three Dimensional Reference System described in SAE J182a. This document relatesto the driver's exterior visibility environment and was developed for the heavy truck industry (Class B vehicles, class 6, 7,8 vehicles) although the projection principles presented in this document can be applied to any class of motor vehicles.This document is intended to complement SAE J1050a and provides a visual format that can describe the driver's entireviewing environment. This environment can then be analyzed to determine what the driver is capable of seeing. It shouldbe noted that one of the most important factors affecting the driver's field of view and the ability to make validvehicle/design comparisons is the location of the driver's eyepoint. SAE J941 defines the Eyellipse which forms the basisfor eyepoints chosen as the origin for Polar Plots and Horizontal Planar Projections. The Target Evaluation, HorizontalPlanar Projection and Polar Plot create monocular evaluations. Projections/plots of multiple eyepoints must be overlaid tocreate binocular or ambinocular evaluations.Analytical methods for creating Target Evaluations, Polar Plots and Horizontal Planar Projections for direct and indirectvision (planar and spherical convex mirrors) are presented. Note that it is possible to create plots and projections forother mirror surfaces and vision devices if the equations for determining reflection points are provided.【英文标准名称】:Rubber,vulcanizedorthermoplastic-Determinationofpermeabilitytogases
【原文标准名称】:硫化、硬化或热塑性橡胶.透气性的测定
【标准号】:BSISO2782-2007
【标准状态】:作废
【国别】:英国
【发布日期】:2007-02-28
【实施或试行日期】:2007-02-28
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:定义;测定;人造橡胶;透气性;气密性;渗透性测量;测试;热塑性的;热塑性聚合物;硫化橡胶
【英文主题词】:Definitions;Determination;Elastomers;Gaspermeability;Gastightness;Permeabilitymeasurement;Testing;Thermoplastic;Thermoplasticpolymers;Vulcanizedrubber
【摘要】:ThisInternationalStandarddescribestwoproceduresformeasuringthepermeabilityofrubbertogasesundersteady-stateconditions.Oneusesahorizontalmeasuringdeviceformeasurementsatconstantpressureandtheotherusesaverticalmeasuringdeviceformeasurementsatconstantvolumeorconstantpressure.Theresultsobtainedbytheseproceduresmaybeextrapolatedtothicknessesofmaterialdifferentfromthatofthetestpiece,providingtherubberishomogeneousandisotropic.Theproceduresapplytosolidrubberofhardnessnotlessthan35IRHDandtogasessuchasair,nitrogen,oxygen,hydrogen,liquefiedpetroleumgas(ingaseousform)andcoalgas.Errorsmaybeintroducedifthegasusedappreciablyswellstherubberundertest.
【中国标准分类号】:G40
【国际标准分类号】:83_060
【页数】:24P.;A4
【正文语种】:英语