CN2533805Y

CN2533805Y - Electronic centro meter

Info

Publication number: CN2533805Y
Application number: CN 02226112
Authority: CN
Inventors: 杨振野; 赖强
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-03-11
Filing date: 2002-03-11
Publication date: 2003-02-05
Anticipated expiration: 2012-03-11

Abstract

The utility model discloses an electronic pupil distance measuring instrument comprising a photoelectric signal translator, a signal processing circuit, a memory circuit, a microprocessor and a digital display circuit, image signals produced by the photoelectric signal translator can be sent to be stored by the memory circuit after being processed by the signal processing circuit, the microprocessor can give digital analysis and process to the image signals of the memory circuit, and then send the image signals to be displayed in the digital display circuit, and the utility model can assure that in spectacles assembling process, no damage will be given to eyes, and the measured data is accurate, which can be operated simply.

Description

Electronics interpupillary distance measuring instrument

Technical field

This utility model relates to a kind of measuring device, more specifically relates to a kind of electronics interpupillary distance measuring instrument that is used to measure human body interpupillary distance information.

Background technology

In the optometry process that gets the right lensses for one's eyeglasses, all need the interpupillary distance of eyes is measured, the existing ruler that adopts is usually directly measured, and the measurement data inaccuracy causes center of lens and pupil not to match like this, and what make the glasses user feels uncomfortable; Ruler eyes of in measuring process, also damaging easily in addition.

The utility model content

This utility model is to provide a kind of measurement data accurate, operates simple and easy, safe and reliable electronics interpupillary distance measuring instrument.

This utility model is realized by following technical measures: it comprises photoelectric signal converter, signal processing circuit, memory circuit, microprocessor and digital display circuit, the picture signal that photoelectric signal converter produces is sent to memory circuitry stores after signal processing circuit is handled, by microprocessor the image information in the memory circuit is carried out being sent to digital display circuit after numerical analysis is handled and show.

Photoelectric signal converter described in the utility model is the CCD camera module of standard or is made of CCD integrated circuit and auxiliary circuit.

Microprocessor described in the utility model is single-chip microcomputer or is the common micro computer of standard.

Because this utility model adopts the CCD photoelectric signal converter to obtain the interpupillary distance information of eyes, can guarantee can not injure eyes in the optometry process that gets the right lensses for one's eyeglasses; The interpupillary distance information of obtaining eyes is in addition handled by microprocessor and is shown by digital display circuit, has improved the precision of measuring, and it is convenient directly perceived to read interpupillary distance.

Description of drawings

Below in conjunction with the drawings and specific embodiments this utility model is further described.

Fig. 1 is a functional-block diagram of the present utility model;

Fig. 2 is the circuit theory diagrams of this utility model specific embodiment;

Fig. 3 is for obtaining the block flow diagram of interpupillary distance information process in embodiment illustrated in fig. 2.

The specific embodiment

As shown in Figure 1 and Figure 2, present embodiment comprises photoelectric signal converter, signal processing circuit, memory circuit, microprocessor and digital display circuit.Photoelectric signal converter adopts the CCD camera module of standard, also can be substituted by existing CCD integrated circuit and the auxiliary circuit that adopts usually; NAND gate IC7A, IC7B, IC7C, IC7D that signal processing circuit is SN74HC00 by two types be TL712 video signal process chip IC6, IC10 and four types are formed by connecting; Trigger IC1A, IC1B, IC2A, IC2B, IC3A and the type that memory circuit is SN74HC393 by five types is that the storage chip IC4 of HM658512 is formed by connecting; Microprocessor is a single-chip microcomputer, and this single-chip microcomputer employing type is little process chip IC5 of 89C2051; The driving chip IC 8 that digital display circuit is 74LS164 by two types, IC9 and three seven segment digital tubes DS1, DS2, DS3 are formed by connecting, and the also available LCDs of charactron substitutes; The picture signal that the CCD camera module produces is sent to memory circuitry stores after video processing circuit is handled, by microprocessor the image information in the storage chip is carried out being sent to seven segment digital tubes after numerical analysis is handled and show.The above-mentioned single-chip microcomputer also common micro computer of available standards substitutes, the picture signal that the CCD camera module produces is handled after standard interface is sent to common micro computer through video processing circuit, store, handle picture signal by common micro computer, and directly on the screen of common micro computer, show.

Concrete work process embodiment illustrated in fig. 2 is as follows: when microprocessor chip IC5 detects the initial signal that the outfan 6 of video signal process chip IC6 is sent, little process chip IC5 sends control signal to each NAND gate IC7A, IC7B, IC7C, the input of IC7D, the output of another video signal process chip IC10 is sent pulse to trigger IC1A through above-mentioned each NAND gate, IC1B, IC2A, IC2B, IC3A, the output of above-mentioned each trigger reaches storage chip IC4 as the address, and the picture signal of video signal process chip IC6 reaches the picture signal input 13 of storage chip IC4; When microprocessor chip IC5 detects the end signal that the outfan 6 of video signal process chip IC6 sends, little process chip IC5 sends control signal makes the output of NAND gate IC7A constant, little process chip IC5 sends control signal and makes it to stop output to video signal process chip IC6, and such screen image storage is finished.Little process chip IC5 sends control signal to each NAND gate IC7A, IC7B, IC7C, the input of IC7D, the output of another video signal process chip IC10 is sent pulse to trigger IC1A through above-mentioned each NAND gate, IC1B, IC2A, IC2B, IC3A, the output of above-mentioned each trigger reaches storage chip IC4 as the address, little process chip IC5 takes from the output signal of the outfan 13 of storage chip IC4 and analyzes by block flowsheet shown in Figure 3, and analysis result uses the serial transfer mode through driving chip IC 8, IC9 transfers to and is passed in parallel to three seven segment digital tubes DS1, DS2, DSS shows the measurement result of interpupillary distance.

Claims

1, a kind of electronics interpupillary distance measuring instrument, it is characterized in that: comprise photoelectric signal converter, signal processing circuit, memory circuit, microprocessor and digital display circuit, the picture signal that photoelectric signal converter produces is sent to memory circuitry stores after signal processing circuit is handled, by microprocessor the image information in the memory circuit is carried out being sent to digital display circuit after numerical analysis is handled and show.

2, electronics interpupillary distance measuring instrument according to claim 1 is characterized in that: described photoelectric signal converter is the CCD camera module of standard or is equipped with auxiliary circuit by the CCD integrated circuit modules and constitutes.

3, electronics interpupillary distance measuring instrument according to claim 1 is characterized in that: described microprocessor is single-chip microcomputer or is the common micro computer of standard.