Three-channel time difference positioning device
A time-difference positioning and three-channel technology, which is applied in positioning, measuring devices, instruments, etc., can solve the problems of manual triggering, weak overall scalability, and lack of accurate acquisition of multiple channels, and achieve high acquisition accuracy, large collection data, and wide range of effects
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Embodiment 2
[0019] In this embodiment, the type selection is carried out on the basis of the first embodiment. In this solution, the multi-output phase-locked loop AD9516-1 with an integrated frequency divider of ADI Company is selected. The frequency of the VCO is 2300-2650 MHz. The reference input frequency range is 0-250MHz. It is already known that the output clock of AD9516 is the key to determine the synchronization of the three channels in this solution. The frequency in the external clock channel is 2300-2650 MHz, and the input frequency is 0-250 MHz. The selected frequency is within this range, and real-time control can be carried out through the internal oscillation frequency.
Embodiment 3
[0021] In this embodiment, on the basis of Embodiment 1, the industrial computer further includes a heat dissipation plate and a fan, the heat dissipation plate is provided with the upper part and the bottom of the AD acquisition card, and the fan is arranged on the end surface of the industrial computer housing. Due to the use of three channels for acquisition, the calorific value of the AD acquisition card is 50% higher than that of the dual channels. It is necessary to install heat dissipation plates on the upper and bottom of the AD acquisition card to dissipate heat. In order to dissipate the heat of the entire industrial computer, the industrial control The heat inside the machine is dissipated by fans.
Embodiment 4
[0023] In this embodiment, on the basis of the first embodiment, the data in each channel of the acquisition sub-card is input to the board through the input signal, the input signal is a broadband signal, and the signal frequency is less than 150 MHz. The signal input bandwidth supported by the acquisition daughter card itself is 1.4GHz. The input adopts AC coupling. According to the requirements of the input signal, select the balun TC1-1T to realize the AC coupling input of the signal. The 3dB bandwidth of the balun is 0.4MHz to 500MHz. Therefore, The input frequency range of the acquisition board is the largest and supports 500MHz input. The trigger control channel performs signal input on the board through three ways: external trigger, timing trigger, and manual trigger. It can be triggered in various ways to carry out continuous acquisition, and the industrial computer controls the start / end data acquisition of the AD acquisition card.
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