Special module for laser range finder

Abstract

The invention discloses a special module for a laser range finder, and relates to a ranging tool. Existing laser ranging products are high in cost and large in size. The special module comprises a module interface used for external equipment; a laser receiving and photoelectric signal processing part which is composed of a photoelectric signal conversion ASIC chip and a peripheral circuit; a lasertransmitting part which is composed of a laser driver ASIC chip and a peripheral circuit; and a main control part including a main control chip and a peripheral circuit. According to the technical scheme of the invention, the laser receiving and photoelectric signal processing part, the laser transmitting part and the main control part replace a traditional general circuit through a special ASICchip, so that the size of the special module for the laser range finder is greatly reduced, integral forming of the module structure can be realized, the quality stability and reliability are improved, and laser ranging products can be conveniently miniaturized and are convenient to carry; and besides, the module cost is greatly reduced, and the use and popularization of the laser ranging productsare facilitated.

Description

technical field [0001] The invention relates to a distance measuring tool, in particular to a special module for a laser range finder. Background technique [0002] There is a huge market for small, low-power, low-price portable laser ranging equipment, and currently the small and low-power products on the market are mainly produced by companies such as Heineken and Bosch in Germany, Phonen in the United States, and Leica in Switzerland. As a representative, but all products are characterized by high price, large size, high price and relatively inconvenient to carry, which restricts the use and popularization of laser ranging products in China. The main problems are as follows: [0003] 1. The existing laser ranging products basically use general-purpose MCUs from companies such as ST, Ti, and Silicon Labs as the main control chip. Take the most commonly used STMicroelectronics STM32 on the market as an example. Timer, ADC, temperature sensor, CAN bus interface, SPI interfa...

AI Technical Summary

Problems solved by technology

However, when used on the rangefinder, such as CAN bus, USB and other functions are not required, and the rangefinder needs to be used, such as PLL, which is not available on this type of general-purpose chip, and must be connected to an external chip. Separate PLL chip

This results in a waste of cost and space

[0004] 2. Existing range finders generally use operational amplifiers + peripheral circuits to build photoelectric signal processing circuits; in addition, the design of laser drive circuits is also a key part. Not only should the laser be able to emit light stably at different temperatures, but also Superimposed modulation signal, the distance meter currently on the market is basically composed of op amp plus triode plus discrete components, the circuit structure is complex and takes up a lot of space

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