Abstract: the design and implementation of a digital tracking ranging module information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Introduction radar zui is one of the main function of target tracking and measuring of the distance. In this first expounds the basic principle of radar range tracking, this paper introduces a digital pulse radar tracking ranging module for the design and implementation of new methods, and describes the module. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the design and implementation of a digital tracking ranging module article details. Introduction radar zui is one of the main function of target tracking and measuring of the distance. In this first expounds the basic principle of radar range tracking, this paper introduces a digital pulse radar tracking ranging module for the design and implementation of new methods, and describes the module developed theoretical basis. The module using the echo signal relative to the quantity of the transmitted pulse delay time of target distance measurement, according to the characteristics of the pulse tracking, delay time to count and track of target echo pulse count, the method of using digital signal processing (DSP) to compare the results of the feedback to tracking controller, realized the pulse radar range tracking, has high accurate, stable range, strong anti-jamming capability and the circuit is simple, etc. The module can be manually tracking the target distance and automatic tracking range. 1, the theoretical design of the module is generally radar tracking digital discriminator is through the time to identify and track pulse echo signal delay between the time difference, and then use clock to count the time difference, as the distance error feedback to track the processing unit, its essence is to put the analog system output digital transformation, namely, on the basis of the analog transform is essentially analog ( As shown in figure 1) 。 Transformation is inevitable between system error exist, such as to track the pulse timing counting, counting and timing of starting time must be transmitted pulse synchronization and radar, it is difficult to achieve complete synchronization, the error between the unavoidable. And as a certain type of radar echo signal in time discriminator and tracking the time difference between pulse should be converted into voltage (with polarity Error) And then to convert the voltage to count pulse distance counter ( There is also a error) Counter do count, plus or minus, make the distance of the distance of target tracking. The module need to know the target echo of binary value, and then compared with tracking pulse binary value, the formation of range error as a generator to track distance feedback to deal with, don't need to track the pulse time measuring, also don't have to pulse echo signal and track the time difference between comparison, simplify the circuit structure, reduce the system error. In radar detection is finished all the way, by counting stop pulse counter and latch reset will control distance. Count stop pulse can be produced by the forefront of a transmitted pulse under, also can be provided by the fire control computer. Figure 2 is designed using the theory of the above data flow diagram of this trace ranging module, the module using the digital technology can realize automatic tracking distance data. Target time delay into digital quantity, zui basic way is to use the counter, and the proper control. When radar transmitted pulse signal, trigger T flip-flop, launched a counter work at the same time, so once received target echo, will again trigger T trigger to make it stop counter counts, thus the arrival of the echo time read counter output data, the data target distance, through comparing with manual ranging counter output value, you get range error values, sent to the controller to track processing. Manual and automatic tracking distance transformation is by the door with a switch. It is obvious that the module tracking controller and pulse generator is shown in figure 1 not tracking controller and pulse generator. At this time of the controller and the track pulse generator has been together ( Here is still with the traditional three parts to distinguish the tracking distance measuring module, but different meaning. ) 。 This module is the advantages of simple structure, easy to understand and versatility is strong. Among the whole tracking system not only can be used in radar, also can be used in common radar trainers generator and track the target echo ranging trainers. 2, hand/auto range tracking ranging module design of the digital range tracking module produced by time discriminator, distance and track of pulse generator.
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