BS 5982-1987 Method for determination of ground speed of earth-moving machinery《运土机械地面速度的测定方法》.pdf

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1、BRITISH STANDARD BS5982:1987 ISO6014:1986 Method for Determination of ground speed of earth-moving machinery ISO title: Earth-moving machinery Determination of ground speed UDC 624.132:621.878/.879:629.11.072BS5982:1987 This British Standard, having been prepared under the directionof the Road Engin

2、eeringStandards Committee, was published underthe authority of the Board ofBSI and comes into effect on 31March1987 BSI 11-1999 First published August1980 First revision March1987 The following BSI references relate to the work on this standard: Committee reference RDB/21 Draft announced in BSI News

3、 November1986 ISBN 0 580 15801 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Road Engineering Standards Committee(RDB/-) to Technical Committee RDB/21, upon which the following bodies were represented: Associated Offices Technical Co

4、mmittee Construction Industry Training Board Construction Plant-hire Association Department of Trade and IndustryMechanical Engineering and Manufacturing Technology Division(Mmt) Federation of Civil Engineering Contractors Federation of Manufacturers of Construction Equipment and Cranes Health and S

5、afety Executive Institution of Civil Engineers Institution of Highways and Transportation Ministry of Defence Amendments issued since publication Amd. No. Date of issue CommentsBS5982:1987 BSI 11-1999 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope and field of

6、 application 1 2 Definitions 1 3 Apparatus 1 4 Test conditions 1 5 Procedure 2 6 Test report 2 Figure Typical layout of equipment for the measurement of machine speed 3 Publications referred to Inside back coverBS5982:1987 ii BSI 11-1999 National foreword This British Standard has been prepared unde

7、r the direction of the Road Engineering Standards Committee and is a revision of BS5982:1980. It takes into account minor changes made in the1979 edition of ISO6014 “Earth-moving machinery Determination of ground speed”, published by the International Organization for Standardization(ISO). This revi

8、sion of BS5982 thereby remains identical with ISO6014 and BS5982:1980 is superseded and withdrawn. Terminology and conventions. The text of the International Standard has been approved as suitable for publication as a BritishStandard without deviation. Some terminology and certain conventions are no

9、t identical with those used in BritishStandards; attention is drawn especially to the following. The comma has been used as the decimal marker. In BritishStandards it is current practice to use a full point on the baseline as the decimal marker. Wherever the words “International Standard” appear, re

10、ferring to this standard, they should be read as “BritishStandard”. Cross-reference The Technical Committee has reviewed the provisions of ISO3450, to which reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. A British Standard does not

11、purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside fro

12、nt cover, pagesi andii, pages1 to4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS5982:1987 BSI 11-1999 1 1 Scope and field of application

13、This International Standard specifies a method of determining the speed of earth-moving machinery. It applies to both wheeled and track-laying earth-moving machinery. The test method specified may be used for many purposes; for each individual purpose the condition of the machine, for example laden

14、or unladen, is to be stated in the test report. 2 Definitions For the purposes of this International Standard, the following definitions apply. 2.1 test track area upon which the test is conducted 2.2 test track length measured length of the track over which the speed is determined 2.3 time recorder

15、 apparatus arranged to measure the time interval 2.4 time interval time taken for the machine to travel the test track length 2.5 machine speed average speed of the machine as it is driven over the test track length 2.6 test speed mean value of the average speeds recorded in the individual tests 2.7

16、 mass mass of the machine in the condition in which it is tested, including the mass of the operator and fuel 3 Apparatus Any equipment may be used to measure the speed of the machine provided that the accuracies specified in clause5 are achieved. For example, the following equipment may be used(see

17、the Figure). 3.1 Light source, used to activate a photo-sensitive transistor. It may be an electric lamp fed by a battery, generator or mains supply. 3.2 Control box, linked to the photo-sensitive transistor and the electronic digital display timer, incorporating a switch to permit time measurements

18、 in either direction. 3.3 Electronic digital display timer (otherwisereferred to as the variable time base counter), used to measure the time interval during which the machine under test traverses the test lengths of the track. NOTEAlternatively, the time may be measured with stop-watch equipment. 3

19、.4 Electrical supply, which may be a direct current supplied by batteries, when an inverter is required to produce an alternating current from a direct current electrical supply. Alternatively, a mains alternating current may be used. 3.5 Tape measure, at least25m in length, to determine the test tr

20、ack length. 3.6 Adjustable tripods, to support all light sources and photo-sensitive transistors at the same height. 4 Test conditions The test may be carried out on any type of track but the test track length shall be a minimum of20m and in any case of sufficient length to be compatible with the sp

21、eed of the machine being tested. Since the apparatus used in the test can be completely portable, it is possible to make speed measurements on gradients, on natural ground and on normal road surfaces in any condition. The time recorder shall be set up in such a way that the machine under test has a

22、sufficiently long approach route to the test length in which to gain the speeds required, and enough room to brake, turn around and, if required, undergo a test in the opposite direction. The test track and machine conditions shall be as specified in the appropriate standard(for example, ISO3450: fo

23、r braking tests which require a knowledge of the speed of the machine, the conditions shall be as required in the Standard). For level test tracks, the difference in height between any two points not less than25m apart along the test track shall not exceed100mm. The cross-fall for all test tracks sh

24、all not exceed1 in40. Immediately prior to the test, the machine shall be run for a period sufficient to ensure that the engine, transmission, oils and coolant are at normal working temperatures.BS5982:1987 2 BSI 11-1999 5 Procedure The machine, prepared as required, shall be driven towards the test

25、 area at a constant speed and shall be driven through the test track length without any change on the throttle setting or gear. It shall be driven in a direction parallel to the longitudinal axis of the test length of the track. The time interval for a point on the machine to traverse the test track

26、 length shall be recorded. The test shall be carried out not less than three times in each direction if the track is level, and not less than six times in one direction if the speed on a gradient is to be determined. The maximum wind speed for tests in one direction shall be6m/s. The average machine

27、 speed over the test track length shall be calculated for each individual test and the mean value of all the speeds calculated and reported as the test speed. The following accuracies shall be adhered to when conducting the tests: The speed, v, in metres per second, shall be calculated from the form

28、ula The test speed shall be the mean of not less than six individual speed measurements. 6 Test report The test report shall contain the following information: a) reference to this International Standard; b) the type of machine; c) the make of machine; d) the number or identification of the machine;

29、 e) whether a wheeled or tracked machine; f) condition of the machine, for example laden or unladen, or as otherwise tested; g) mass of machine, in kilograms; h) auxiliary components attached, for example dozer blade; i) attitude of attachment, for example “bucket at the carry position”; j) tyre siz

30、e, ply rating, and condition; k) tyre pressure, in kilopascals; l) condition of the test track, i.e.wet or dry; m) type of test track, i.e.asphalt, concrete, gravel, natural ground; n) measured length of test track, in metres; o) longitudinal gradient of test track, i.e.level, up gradient, down grad

31、ient; p) cross-fall of test track; q) machine gear at which test was conducted; r) weather conditions, including wind speed, in metres per second, and direction relative to the test track; s) any other details relevant to the particular test carried out, for example type and mode of operation of bra

32、kes, condition of machine; t) machine speed measurements: u) determined test speed, v, of machine, in kilometres per hour: NOTEThe average value of speed v should be rounded to one decimal place. Measurement Accuracy Test length of track,l, in metres 0,25% Time interval, t, in seconds 2,0% v l t - =

33、 Test track length, l: . . .m Gear engaged: . . . Test No. Direction of travel (for example left to right, right to left, downhill) Time interval Machine speed n t s m/s(km/h) 1 2 3 4 5 6 . . . n t 1 t 2 t 3 t 4 t 5 t 6 . . . t n v 1 v 2 v 3 v 4 v 5 v 6 . . . v n v l t - = v v 1 v 2 v 3 . . .v n + n

34、 - =BS5982:1987 BSI 11-1999 3 Figure Typical layout of equipment for the measurement of machine speed4 blankBS5982:1987 BSI 11-1999 Publications referred to Seenational foreword.BS5982:1987 ISO6014:1986 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent na

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