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Auto meter main drum diameter standard device testing method


Automotive vehicle test equipment meter. J mole is the use of equipment selection method in the wheel cylinder and the vehicle pull up the role of friction relative movement through the simulated car driving on the road,[link widoczny dla zalogowanych], see Figure l, Figure 2. L lap 2 lap main drum design selection device perimeter is lm, the wife of the circumference of drum rotation is equivalent to the product of car driving away. Therefore, the accuracy of the circumference of the main drum a direct impact on the verification device to the total uncertainty. Usually installed in the bracket on the main drum diameter measuring the circumference of the existence of certain difficulties, the amount of the clamor direct http on both sides of the main drum support affected by the number of measurement tools difficult to use, if the measurement of the main drum removed. There is demolition, installation and assembly to ensure concentricity and other issues. Direct measurement by steel tape method of indole rough week should not be used. I can guarantee to find a thick measurement accuracy, but also simple and feasible strings Longbow Supreme Court. Second, the use of bow string measure the main drum Leopard Supreme Court steps l-measure chord length b. Figure 3 who first accurate 0.02ram, range 300ram vernier caliper and measured tangential to the outer surface of drum,[link widoczny dla zalogowanych], caliper cylinder every card pin fall,[link widoczny dla zalogowanych], when the main caliper drum foot center line and being guillotine is not vertical, measured chord length greater than a string bound to the actual value of the public b, measurement scale card when the main cylinder on the left and right foot on the rollers move, observe the readings on the main scale, when reading the hour, this value is the actual value b. If the caliper of the main ruler and measured the vertical cylinder of less than 2. , The tilt error can be caused by ≤ 0.15ram. Figure 32. Elimination of ovality cylinder measuring chord length b, in order to re-roll each 0. Tidal volume of a number, find the average, to eliminate the degree of the drum caused the error ellipsoid ridicule. 3. Http high volume bow. Figure 3 shows, high arch foot length h is the card with an accuracy of ± 0.02ram, range or 200ram to 300ram depth vernier caliper card volume scale rinse feet in length h. 4. Difficulties calculating the circumference of diameter D is [/ (4)] + h, so a total ,,,,/ l v, lf =- (6. 14h +) as long as the calculated chord length 6, the bow can be calculated with high wind circumference of a circle. Yi to solve the drum perimeter detection. Third, the error analysis 1. Li 』amount of equipment error; 1) caliper error s. = 0_02ram2) degree-foot waterfall error s: = 0.02ram2. Operating error: 1) reading error s = 0.01mill2) caliper tilt position error s ≤ 0.15m, m3. Uncertainty of measurement D s: & = Si + S; + S; + S = ± 0.15ram4. F circumference measurement uncertainty hut. Sf ・ S = ± 0.47ram four, according to data comparison tsunami near base: Japanese production of T-1 type testing equipment / inspection requirements of the project, the price of the juice used in the main control device elm rollers and fixed rollers were cut repeated measurements of silicon cut from six ~,) test comparison of the data obtained following table: Table ridicule lBfcDlgFI31828 ~ 31815318.25 given position from the main river 8j3-. 8. . \318. \o8Il61.97161.91161.93l161-g3 roller T test;. . . s! et-. s1t. . . eIte-. {Te ・. ee. Longbow Supreme Court tube with a string of data obtained with the Japanese manufacturers factory test data are very consistent. In 1989 a pilot plant manufactured Beijing measurement meter shuttle main drum unit was scheduled to review prospective, factory test results and data sets are also very kiss. Ohm meter dial once and measurement error analysis of eight security 7, / BOE to vote table radio factory measurement Branch) Abstract Bong husband had left on the touch panel ohm differential analysis of macrophages derived indication of the resistance dial variation of the relative error . Determine the best halo disk Eagle Point and the preferred display area shows. Cliff made the necessary disk measurement conditions and measurement points, to optimize dial test and improve the accuracy of the multimeter to measure resistance Eagle Yi-pace back and forth basis. First, the indication dial ohm variation of the electric meter ohm file shown in the schematic in Figure l. Figure,[link widoczny dla zalogowanych],. - Current meter full scale;. - Ohmmeter resistance; ... table battery voltage. I connected the two terminals when the circle} Perak I be resistance, the line current is E / (R. TR,), so R,[link widoczny dla zalogowanych], 一 0 J just E = I ... R, King was' D_zx die ugly. . r one. 0 (1) a - 1, where circles. f,, - current meter deflection percentage, that is, the percentage of dial arc deflection. According to equation (1) to calculate the R, / R. ~ I, 』. Is shown in Figure 2. Figure 2 shows the difference between t ix a surgery, infringe Meter

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