Pulse laser ranging system transistor type receiving circuit error correcting method

A pulsed laser ranging and receiving circuit technology, applied to radio wave measurement systems, instruments, etc., can solve the problems of inability to accurately calculate the size of the walk error, low correction accuracy, and calculation, so as to achieve accurate walk error and improve measurement The effect of high accuracy and measurement accuracy

Active Publication Date: 2019-04-16
NANJING UNIV OF SCI & TECH +1
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Problems solved by technology

[0004] However, the problem existing in the existing double-threshold correction method is that since the value of the double-threshold moment cannot be used to accurately estimate the magnitude of the walk error, it is a basic The improvement scheme of the frontier t

Method used

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  • Pulse laser ranging system transistor type receiving circuit error correcting method
  • Pulse laser ranging system transistor type receiving circuit error correcting method

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Embodiment Construction

[0019] The invention is mainly aimed at the transistor-amplified receiving channel circuit of the pulse laser ranging system. This part of the circuit is responsible for the lossless amplification of the echo signal. The low-noise design, bandwidth design and gain setting of the circuit are all related to the accuracy of the final ranging system. The amplification circuit is generally divided into two parts: a preamplifier circuit and a main amplifier circuit. The preamplifier circuit acts as an active load of the APD, converts the current signal into a voltage signal with low noise, and supplies it to the main amplifier. The main amplifier circuit realizes high signal gain. Amplify, amplify and stabilize the echo signal at a certain voltage value, and supply it to the time identification circuit.

[0020] Such as figure 1 As shown, the error correction method of the transistor-type receiving circuit of the pulsed laser ranging system of the present invention includes the fol...

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Abstract

The invention discloses a pulse laser ranging system transistor type receiving circuit error correcting method. The pulse laser ranging system transistor type receiving circuit error correcting methodcomprises the following steps that (10) a circuit modeling is received, wherein a circuit equation set is listed according to a circuit structure and a transistor classic model; (20) a circuit equation set is solved, wherein a numerical value approximation solution of the circuit equation set is solved by means of discretization and numerical analysis; (30) the circuit equation set is simplified,wherein the circuit equation set is reserved according to the numerical value approximation solution of the circuit equation set; (40) a linear differential equation set is solved, the linear differential equation set is solved to obtain an approximate relation between the walking error and the input current; (50) an error relation is determined, wherein a double-threshold moment is substituted into the approximate relation to obtain the relation between the walking error and the double-threshold moment; and (60) time error is corrected, wherein the specific numerical value of the double-threshold moment is substituted into the relation to obtain an error value, and the error value is subtracted from the time interval to obtain an accurate time interval. The error correcting method is small in error and high in system measuring precision.

Description

technical field [0001] The invention belongs to the technical field of laser ranging, in particular to an error correction method for a transistor-type receiving circuit of a pulse laser ranging system. Background technique [0002] The accurate measurement of distance is of great significance to the development of national defense construction, engineering construction and national economy. In the fields of public transportation, geodetic surveying, engineering building inspection and other fields, the range and accuracy requirements for distance measurement are constantly improving. Due to the characteristics of large range, high precision, day and night availability, and good directionality, laser ranging makes laser ranging a A widely used ranging method. Laser ranging technology uses a beam of laser light to the target, and the photoelectric device receives the laser signal reflected by the target, calculates its flight time or measures its phase difference to calculat...

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Application Information

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IPC IPC(8): G01S7/487
CPCG01S7/4876
Inventor 顾国华杨锦清钱惟贤任侃张骏刘泽伟钱烨杨文广郭萍萍花睿
Owner NANJING UNIV OF SCI & TECH
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