在某些场合下,要求对运动物体的某些参数进行测量。如测量在高速运转时轮机叶片的变形,测量新型汽车试车时各部分性能的变化,测量在试验机上模拟路面行驶时轮胎内气压及各点温度的变化,等等。在测量时,要直接引出反映有关参数变化的信号,有一定的困难。当然,有时可用滑环将信号引出,但目前生产高质量的滑环仍有一定困难。另外,如被测对象离控制中心过远,则长距离引线既不合适,有时甚至不可能。因此,研制精度高、体积小,重量轻的无线电发射装置,以解决上述在实践中出现的困难,殊有必要。北京某单位在研制轮胎动性能试验机时,曾要求 In some cases, some parameters of moving objects are required to be measured. Such as measuring the deformation of the turbine blades during high-speed operation, measuring the performance changes of various parts during the test of a new automobile, measuring the changes of the air pressure and the temperature at each point during the simulation of the road on the testing machine, and the like. In the measurement, it is difficult to direct the signal that reflects the change of the relevant parameters. Of course, slip rings are sometimes used to pull the signal out, but there are still some difficulties with producing high quality slip rings. In addition, if the measured object is too far away from the control center, the long-distance lead is neither suitable nor sometimes possible. Therefore, the development of high precision, small size, light weight radio transmitter to solve the above difficulties in practice, it is necessary. Beijing unit in the development of dynamic performance testing machine tires, had requested