Composite phase detection method and composite phase discriminator

A phase detector and a technology for receiving signals, which are applied in the fields of composite phase detection methods and composite phase detectors, and can solve the problems of low precision of pulse signals and increase of absolute measurement errors.

Inactive Publication Date: 2006-07-19
成都中科动态仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0045] 2. Defect analysis
Since the measurement method based on continuous signals can only measure the phase within one cycle, in order to increase the range, the signal modulation frequency must be reduced, thereby increasing the absolute error of the measurement
However, the accuracy of the pulse signal emitted in the laser pulse ranging method is very low in the full range.

Method used

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  • Composite phase detection method and composite phase discriminator
  • Composite phase detection method and composite phase discriminator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Such as Figure 4 As shown, a composite phase identification method has the following steps:

[0089] A. Transmitting a group of signals with the same frequency f and number of cycles n through the signal transmitting module, where n is a positive integer, and the counter starts counting at the system clock oscillation frequency;

[0090] B. Receive the received signal sent by step A after a period of flight and return through the signal receiving module, and convert it into a digital signal through A / D;

[0091] C. Roughly estimate the reference time t of the received signal according to the predetermined trigger condition 0 ; The predetermined trigger condition refers to selecting the most easily identifiable initial period of the signal period as the predetermined trigger period according to the nature of the initial period of the transmitted signal of the system, where the most easily identifiable refers to the second peak of the signal period minus the first The ...

Embodiment 2

[0100] A composite phase identification method, same as embodiment 1.

[0101] A composite phase detector for realizing the above-mentioned composite phase detection method includes a power supply, a signal transmitting module and a signal receiving module, and also includes a digital circuit module and a computing module integrated by D / A, A / D and a synchronous controller, and the computing module The module is CPU or PDSP. Among them, the signal transmitting module includes a modulator and a transmitter, the signal mode modulated by the modulator is provided by the A / D channel of the digital circuit module, and the modulator controls the transmitter to transmit signals; the signal receiving module includes a receiver, a reference signal receiver and a conditioning Circuit, the receiver converts the received signal into an electrical signal, which is input to the A / D channel of the digital circuit through the conditioning circuit, and the reference signal receiver is used to ...

Embodiment 3

[0108] A composite phase identification method, same as embodiment 1.

[0109] A composite phase detector for realizing the above composite phase detection method includes five components: a signal transmitting module, a signal receiving module, a digital circuit module, a computer and a power supply. The difference from the circuit schematic diagram of the composite phase detector based on software calculation is that the computer only does the work of the man-machine interface and not the work of the algorithm. The work of the algorithm is placed in the digital circuit module, that is to say, the algorithm is hardwareized.

[0110] The workflow of the composite phase detector is introduced as follows:

[0111] After receiving an instruction to start measurement through the system bus, the bus controller of the digital circuit module converts the instruction into a command to start the DAC channel (connected to the D / A channel) to transmit the signal, and the command starts t...

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Abstract

The invention discloses a composite phase discriminator and its method. The method compounds the simple phase demodulation time method and the counting time method, which sends a group of signal with the period number of the same frequency f and receives the returned receiving signal after a period time of flight, it rough estimates the receiving signal reference time t0 and then computes the phase position ªŽof the signal by the computing module and quotes the signal period number of the t0 point position distance receiving signal real start point to compute the accurate flight time tfly; the composite phase discriminator comprises a power, a signal sending module, a signal receiving module, a computing module and a D / A and A / D, wherein the holding controller controls the D / A and A / D; the signal sending module and the signal receiving module work synchronically.

Description

technical field [0001] The invention relates to a phase detection method and a phase detection device, in particular to a composite phase detection method and a composite phase detection device. Background technique [0002] Active radar systems usually transmit signals through the signal transmitting module, and the signal receiving module receives the reflected signal of the target to analyze the characteristics of the target such as distance movement speed. And there is a type of ranging radar, such as: laser ranging radar, ultrasonic ranging radar... Multiply it with the speed to get the distance between the target and the signal transmitting module. Among them, the measurement of signal time-of-flight becomes the key. Accurate and high-speed signal time-of-flight measurement can greatly improve the measurement accuracy and dynamic characteristics of these measurement fields, so that these measurement methods have a wider range of application. [0003] The following is...

Claims

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Application Information

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IPC IPC(8): G01S7/02G01S7/41G01S7/48G01S7/52G01S7/539
Inventor 程昕肖毅腓
Owner 成都中科动态仪器有限公司
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