CN203142178U

CN203142178U - Compass capable of digitally displaying angle and length

Info

Publication number: CN203142178U
Application number: CN 201320103808
Authority: CN
Inventors: 孙文韬; 黄建通
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-03-06
Filing date: 2013-03-06
Publication date: 2013-08-21
Anticipated expiration: 2023-03-06

Abstract

The utility model provides a compass capable of digitally displaying angle and length, and relates to a compass. The compass is provided with a handle, a positioning foot, a measuring foot and a circuit part, wherein the circuit part is provided with a casing, the casing is arranged at the upper part of the positioning foot and the measuring foot of the compass, a light source, a micro-distance sensing grating, a pulse receiver, a logic circuit and a power supply are arranged in the casing, a display is arranged on the surface of the casing, optical pulse signals of the micro-distance sensing grating are reflected into the pulse receiver, the pulse voltage signal output end of the pulse receiver is connected with the input end of the logic circuit, the operation result signal output end of the logic circuit is connected with the display, and the output end of the power supply is respectively and electrically connected with the pulse signal receiver, the logic circuit and the display. The scale structure of the drawn arc line angle and the measured length is directly displayed in an electronic and digital way, and particularly, the improved design is carried out by aiming at the defect of reading inconvenience of common use scales for middle school students after the measurement.

Description

Can digital angles of display and the compasses of length

Technical field

The utility model relates to a kind of compasses, especially a kind of can digital angles of display and the compasses of length.

Background technology

Compasses are a kind of mathematical tool commonly used and drawing instrument, are applicable to how much, geographical teaching, and the calculating directly perceived of trigonometric function and map line length are measured, particularly the daily indispensable stationery of giving a lesson of middle school student.At present, the compasses that middle school student use always can only be to determine a center of circle, do circular arc or draw circle, and draw the also handy ruler amount of going of diameter of a circle or radius, and the angle of the circular arc of doing also handy protractor is removed measuring angle.And some multi-functional compasses are not only expensive, and bulky, carry inconvenience, only are applicable to the professional and technical personnel.

Chinese patent CN102310692A discloses a kind of multifunctional compass, comprises angle and measures pin, and described angle and measurement pin top are fixed together; It also comprises the measurement dish, and described measurement dish comprises measurement section and fixed part; Described fixed part is fixed in the measurement dish on the angle; Described measurement section comprises measures body and angle dial; Angle dial is positioned at the outer of measuring body; Described measurement section and measurement body all are one 1/4 circle.

In addition, Wu Jianxing discloses a kind of electronic digit demonstration and measures the ruler structure in the patent TW093216883 of Taiwan, is to use the curling tape measure of elasticity as measurement core.Not only complex structure, and certainty of measurement is not high.

Summary of the invention

The purpose of this utility model be to provide a kind of can digital angles of display and the compasses of length.

The utility model is provided with handle, angle and measurement pin, also be provided with circuit part, described circuit part is provided with housing, and housing is located at the angle of compasses and measures the top of pin, is provided with light source, microspur induction grating, pulse receiver, logic circuit and power supply in the described housing; Surface of shell is provided with display; The light pulse signal of microspur induction grating reflexes to pulse receiver, the input of the pulse voltage signal output termination logic circuit of pulse receiver, and the operation result signal output part of logic circuit connects display; Power output end is electrically connected with pulsed signal device, logic circuit and display respectively.

Described display can adopt LED display.

Described surface of shell can be provided with power switch and SR, and power switch and SR are electrically connected with power supply.

Compare with existing compasses, the utility model adopts electronic digit directly to show the ruler structure of drawn camber line angle and chainage, especially carries out improvement design at middle school student's ruler commonly used in measuring the shortcoming of being inconvenient to read in the back.

Description of drawings

Fig. 1 is the circuit composition frame chart of the utility model embodiment.

Fig. 2 is that the structure of the utility model embodiment is formed schematic diagram.

The specific embodiment

Referring to Fig. 1 and 2, the utility model embodiment is provided with handle 1, angle 11 and measures pin 12, also be provided with circuit part, described circuit part is provided with housing 2, housing 2 is located at angle 11 and measures the top of pin 12, is provided with light source 21, microspur induction grating 22, pulse receiver 23, logic circuit 24 and power supply 25 in the described housing 2; Housing 2 surfaces are provided with display 26; The light pulse signal of microspur induction grating 22 reflexes to pulse receiver 23, the input of the pulse voltage signal output termination logic circuit 24 of pulse receiver 23, and the operation result signal output part of logic circuit 24 connects display 26; Power supply 25 outputs are electrically connected with pulsed signal device 23, logic circuit 24 and display 26 respectively.Display 26 can adopt LED display.Described housing 2 surfaces can be provided with power switch 27 and SR 28, and power switch 27 and SR 28 are electrically connected with power supply 25.Described housing 2 can adopt the cuboid of long 4cm * wide 1cm * high 2.5cm, the induction grating can be sensed the small flexible of two compass foots (angle 11 and measurement pin 12) on the one hand, directly be shown on the LED display by circuit conversion again, respond to grating on the other hand and also can sense the angle variation that this compasses feet turns over, be shown on the LED display by circuit.This circuit and LED display only need when not sensing detection signal, be postponed to close LED display automatically after 30 seconds, to save power supply by an A76 button cell power supply.As when reusing, can press SR and namely show again, also can be by pressing the direct powered-down of power knob.In Fig. 1, the rotation displacement of pin, the telescopic moving that A2 represents angle and measures pin are measured in mark A1 representative.

So just can directly be shown on the LED display easy-to-read with digitlization with measuring size or drawing the angle that circular arc turns over; And LED display, circuit board, power supply (button cell) etc. all are located on the compasses, have not both had the profile of too big change middle school student ruler commonly used, and the circular arc of required angle that can draw is exactly again also conveniently measured the air line distance in the certain-length.

Below provide digital displaying principle of the present utility model: two compass foot telescopic movings change by the porous grating, and light pulse is reflexed to pulse receiver, pulse are delivered to output to LED display after the logic circuit computing and go to show again; In like manner the rotation displacement of center of circle pin also is to convert pulse to by identical porous grating, gives the logic circuit computing, converts angle to and outputs to LED display and go to show.The porous grating is arranged 50 holes according to the order of sequence, export 50 pulses, convert voltage signal to by pulse receiver then, enter logical operation circuit through amplification and rectification circuit, thereby the change in displacement with 0.5mm between the compasses bipod, be subdivided into 1/50, the pulse of 0.01mm of namely whenever being separated by shows through being transported to LED display again after the logic circuit calculating.Measurement as for angle also is as a same reason, and difference only is detected displacement, and logic circuit is calculated to be angle to it and gives LED demonstration.

Claims

1. can digital angles of display and the compasses of length, be provided with handle, angle and measurement pin, it is characterized in that, also be provided with circuit part, described circuit part is provided with housing, housing is located at the angle of compasses and measures the top of pin, is provided with light source, microspur induction grating, pulse receiver, logic circuit and power supply in the described housing; Surface of shell is provided with display; The light pulse signal of microspur induction grating reflexes to pulse receiver, the input of the pulse voltage signal output termination logic circuit of pulse receiver, and the operation result signal output part of logic circuit connects display; Power output end is electrically connected with pulsed signal device, logic circuit and display respectively.

2. as claimed in claim 1 can digital angles of display and the compasses of length, it is characterized in that described display adopts LED display.

3. as claimed in claim 1 can digital angles of display and the compasses of length, it is characterized in that described surface of shell is provided with power switch and SR, power switch and SR are electrically connected with power supply.