东德标准化、度量衡、质量检查局研究出了广泛用于齿轮生产的测量齿轮和双面啮合检查仪的检定方法及工具。在测量齿轮生产的过程中,为了综合评价齿轮的误差而采用测量齿轮的单项误差是不够可靠的,综合误差应按参数F_i″(测量齿轮转一周时度量中心距的变动)和f_(?)″(测量齿轮转过一个齿时度量中心距的变动)进行评定。测量齿轮的上述参数允许误差应为被测齿轮公差的0.25～0.33。对测量齿轮的检验予先已制订了一些典型的方法,由于通常不可能用更高精度的齿轮来检查高于五级精度的测量齿轮。在这些方法的基础上,本尔恩特教授提出了三个测量齿轮彼此以不同组合方式的双面啮合测量原理。该原理是在ZA450S〔C·Zeiss〕仪器上进行研究的。在三个齿轮测量法中,使用三个同一模数的测量齿轮A、B 和C,它们配对组成三组AB、BC 和AC。在测量时,必 East Germany standardization, measurement and weighing, the quality inspection bureau has developed a wide range of gears used in the production of gear and double-meshing tester test methods and tools. In the process of measuring gear production, in order to comprehensively evaluate the error of the gear, the single error of measuring the gear is not reliable enough. The comprehensive error should be according to the parameter F_i “(the change of the measuring center distance when the gear rotates one week) and f_ (? ”(Measure the center of rotation of a gear when the gear moves one tooth). The allowable error of the above parameters of the measuring gear should be 0.25 ~ 0.33 of the measured gear tolerance. Tests on the measuring gear have been preceded by some typical methods, since it is usually not possible to inspect measuring gears above a five-level accuracy with higher-precision gears. On the basis of these methods, Professor Bernhardt proposed the principle of two-sided meshing of three measuring gears in different combinations with each other. The principle is studied on the ZA450S [C · Zeiss] instrument. In the three-gear measurement, three identical measuring gears A, B and C are used, paired to form three groups of AB, BC and AC. In the measurement, must