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A special circuit for laser ranging and a ranging method based on the circuit

A special circuit, laser ranging technology, applied in the direction of measuring distance, re-radiation of electromagnetic waves, measuring devices, etc., can solve the problems of being greatly affected by external interference, low integration of laser drive circuits, large area, etc. The effect of small impact, high integration and area reduction

Active Publication Date: 2021-06-22
HANGZHOU GREAT STAR IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of a large number of discrete components makes the laser drive circuit have the problems of low integration, large area, and great influence from external interference.

Method used

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  • A special circuit for laser ranging and a ranging method based on the circuit
  • A special circuit for laser ranging and a ranging method based on the circuit
  • A special circuit for laser ranging and a ranging method based on the circuit

Examples

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Comparison scheme
Effect test

Embodiment 1

[0057] This embodiment proposes a special circuit for laser ranging, including a main control chip, a photoelectric processing chip and a laser driver chip. The photoelectric processing chip and the laser driver chip are connected with the main control chip.

[0058] Such as Figure 4 As shown, the main control chip is composed of an on-chip microcontroller, a pulse phase IP core, a first ADC module, a second ADC module, digital peripherals, a programmable multi-phase phase-locked loop, a power management module, and a storage module.

[0059] The pulse phase IP core, the first ADC module, the second ADC module and the digital peripherals are all connected to the microcontroller through the bus. The programmable multi-phase phase-locked loop is connected with the pulse phase IP core. The digital peripheral equipment includes a UART, a dedicated block for keyboard connection, and a GPIO block. The storage module includes ROM and RAM.

[0060] Specifically, the pulse phase I...

Embodiment 2

[0084] This embodiment proposes a laser ranging method based on the dedicated laser ranging circuit described in Embodiment 1, which specifically includes:

[0085] S1. The microcontroller in the main control chip sends control information to the laser driver chip through the pins LASCTRL0_O, LASCTRL1_O, LASSYNC0_O, and LASSYNC1_O connected to the pulse phase IP core, and controls the pulse generator to emit a pulse laser with a frequency of 320MHz and a pulse width of about 600ps;

[0086] As mentioned above, in the present invention, the microcontroller in the main control chip controls the laser driver chip through the pins LASCTRL0_O, LASCTRL1_O, LASSYNC0_O, and LASSYNC1_O connected to the pulse phase IP core. Control the laser driver chip to drive the laser to emit laser light. In order to overcome the problem that the phase laser rangefinder in the traditional phase method continuously emits a laser beam with a modulated signal and the measurement distance is short, the ...

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Abstract

The invention discloses a special circuit for laser ranging and a distance measuring method based on the circuit. Microcontroller, pulse phase IP core, first ADC module, second ADC module, digital peripherals, programmable multi-phase phase-locked loop, power management module, and storage module; the photoelectric processing chip consists of the first amplifier and the second amplifier , capacitors and photodiodes; the laser driver chip consists of a power management module, a first low-dropout linear regulator, a second low-dropout linear regulator, a third low-dropout linear regulator, a power-on reset module, and a pulse generator , Programmable multi-phase phase-locked loop, digital logic module, signal error detection module. The invention has the advantages of high circuit integration, small area and little influence by external interference, greatly reduces the hardware cost of the circuit, and can realize long-distance and high-precision distance measurement.

Description

technical field [0001] The invention relates to the technical field of electronic communication, in particular to a special circuit for laser distance measurement and a distance measurement method based on the circuit. Background technique [0002] With the rapid development of laser detection technology, the application of laser detection technology for distance measurement is becoming more and more extensive. The existing laser ranging methods mainly include: pulse method, phase method and triangulation method. Among them, the pulse method is a series of pulses generated by the laser, and then the receiver detects the laser pulse signal reflected from the object to be measured, and calculates the time difference, combined with the speed of light 2.99792*10 8 m / s, the distance from the radar to the measured object can be calculated. The phase method is to use the frequency of the radio band to modulate the amplitude of the laser beam and measure the phase delay generated ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/48
CPCG01S17/48
Inventor 王伟毅盛蕾佳李跃明
Owner HANGZHOU GREAT STAR IND CO LTD
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