Intelligent opto-electrical direct reader

Abstract

The invention discloses an intelligent photo-electrical direct reader, comprising a single chip, a communication interface component, a DC supply component, and a plurality of photo-electrical sensingdecoder components, which are composed of plural pairs of photo diodes and light-emitting tubes, plural photo-electrical sensor components; an RC vibrator in the single chip is used as a system clock, the method of modifying an OSCCAL register data which is used for marking the RC vibrator is used for marking the RC vibrator, the photo diode and the light-emitting tube of each photo-electrical sensor component are supplied by the port of the single chip independently, the public end of the photo-electrical pair tube at the position corresponding to the photo-electrical sensing decoder components is controlled by the port of the same single chip, the measurement data (ADC) is processed by concrete quantized method, the external light of the photoelectric sensor as well as the electric property state of the actual measured sensing signal and the pair tube of the photoelectric sensor are scanned and measured, '0' and '1' logic level comparison threshold values can be adjusted dynamically, when the state of the photoelectric sensor is wrong, the code redundancy compensation algorithm can be initiated to correct the data, after the data information is processed by validation algorithm,different addresses are stored as back-up; the direct reader of the invention has the characteristics of high disturbance resisting capacity and low cost.

Description

Technical field: [0001] The invention relates to an intelligent photoelectric sensor, which is suitable for measuring instruments, instruments and equipment that need to output electrical signal codes for the readings displayed by mechanical counters, especially digital transmission direct-reading water meters, gas meters, electric meters, etc. Measuring instruments and meters that display numbers corresponding to the rotation position of the wheel and output electrical signal codes. Background technique: [0002] At present, there is a device that reads the reading information of a meter by adding a photoelectric sensor component to the automatic remote meter reading technology, that is, a photoelectric direct reading sensor device, referred to as a photoelectric direct reading device. The device transforms the counter character wheel of the original mechanical counter device, and uses photoelectric sensor components to convert the ten numbers "0"-"9" on the counter charact...

AI Technical Summary

Problems solved by technology

With the development of technology, photoelectric direct reading technology has developed rapidly in the past two years, but the existing intelligent photoelectric direct reading devices used for measuring instruments and meters have obvious shortcomings: 1. It is easy to be interfered by external light , when the external light is too strong, measurement errors are prone to occur. In order to reduce the impact of external light on the photoelectric direct reading device, many manufacturers use far-infrared infrared photoelectric pair tubes, but the external light in the environment where the photoelectric direct reading device is located is a A broad-spectrum light, when the external light reaches a certain intensity, even if the far-infrared photoelectric tube is used, it cannot effectively solve the problem of light interference; 2. Most products use the switching value measurement principle, although a few use the analog-to-digital conversion ADC technology, but "0 ", "1" The logical boundary threshold adopts a fixed value, which cannot effectively resist the problem of external interference; 3. If the internal RC oscillator of the single-chip microcomputer is used, the instability of the RC oscillator may easily lead to unstable communication, resulting in data The transmission is abnormal, so most manufacturers use external crystal oscillators, resulting in increased cost and increased volume; 4. The initialization data and measurement data of the photoelectric direct reader are stored in the EEPROM storage unit, and the EEPROM memory is unstable in the single-chip system In some cases, if the storage and processing technology is not enough, the saved data will be easily lost; 5. Infrared tubes must be used as photoelectric sensors, and visible light tubes cannot be used in conjunction with photosensitive receiver tubes. The cost is high and the production process is not intuitive; 6. 、Usually, there are dozens of photosensitive receiving tubes and light emitting tubes in an intelligent light point direct reading device. Once any photosensitive receiving tube or light emitting tube is damaged, it will cause the measurement of the entire photoelectric direct reading device to be inaccurate, and even cause the entire photoelectric direct reading device to be inaccurate. If the device is scrapped, the use cost will be greatly increased. Due to the existence of the above defects, the use cost of the intelligent photoelectric direct reader will increase, and the long-term work stability will not be high, which will make the promotion more difficult.

Images