CN2501121Y

CN2501121Y - Electric readable counter

Info

Publication number: CN2501121Y
Application number: CN 01262869
Authority: CN
Inventors: 孙建国
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-09-18
Filing date: 2001-09-18
Publication date: 2002-07-17
Anticipated expiration: 2011-09-18

Abstract

The utility model relates to a counter for Three Meter Long Distance Transfer Data management, in particular to an electrical readable counter with a character wheel. The circumference of the face of the character wheel is equally divided into a plurality of sectors; each of the sectors is coded in turn, making one sector correspond to one code. A code reading probe and a readout circuit are arranged between adjacent character wheels, and outer leading signal lines are also arranged thereon. The utility model provides an electrical readable counter which is needless of long-term connection with the power, capable of reading out the counting values momentarily through long distance transfer, and free of the destruction of the external magnetic field.

Description

The electronically readable counter

Technical field: the utility model relates to a kind of counter that is used for the three meters long distance transmission data management, particularly has the electronically readable counter of character wheel.

Background technology: three traditional tables all are provided with mechanical types such as pointer-type or character wheel formula, for generally all adopting in instrument, the purpose that reaches energy teletransmission data rotates tongue tube or the Hall element that magnet and adjacent magnet are installed on the counter block, or adopt photoelectric tube and grating is counted and deliver to formation electronically readable counter in the data capture management device through signal wire, but this class counter has a common defective, be exactly that power supply must be connected for a long time, otherwise will lose the data between turnoff time, make the data that collect and pointer or character wheel and real data that discrepancy be arranged, in case lost after the data as regaining correct data, can only take artificial method to read to the scene, thereby make whole data remote acquisition system lose meaning, its another defective is to be subject to the external magnetic field influence make counting inaccurate, makes unique people that chance be arranged.

Summary of the invention: the purpose of this utility model is to provide a kind of power supply to need not long-term connection for overcoming the deficiencies in the prior art, can reads count value by teletransmission at any time and is not subject to the electronically readable counter that external magnetic field destroys.

For realizing the purpose of this utility model, the technical solution that adopts is as follows: character wheel end face circumference is divided into some covering of the fans, and each covering of the fan is encoded successively, makes covering of the fan corresponding one by one with coding, between adjacent character wheel, be provided with coding and read probe and read circuit, and be provided with the outer signal wire that draws.

Adopted the electronically readable counter of said structure, because each covering of the fan all is provided with corresponding codes with it, and the coding can by coding read the probe and read circuit and read and be sent to data acquisition unit, can obtain counter character wheel numerical value at any time, reading circuit only needs power supply is provided when reading, and the character wheel counting need not power supply, there is not magnet-sensitive element yet, therefore energized is not for a long time influenced by external magnetic field can yet and measures error, has overcome the defective of existing counter.

The utility model is described in further detail and provide embodiment below in conjunction with accompanying drawing.

Description of drawings:

Fig. 1 is the utility model example structure synoptic diagram;

Fig. 2 is Fig. 1 vertical view;

Fig. 3 is one of a character wheel coded system synoptic diagram;

Fig. 4 is for reading circuit theory diagrams;

Fig. 5 is for reading the circuit program FB(flow block).

Specific embodiment: as Fig. 1; shown in Figure 2; electronically readable counter of the present utility model still comprises shell 1; character wheel 5; carry gear 2; character wheel 5 coaxial being installed in movingly on the print wheel shaft 3; print wheel shaft 3 one ends are fixed in the pit of shell 1 madial wall; the other end passes another sidewall of shell 2 to shell; establish a driving gear 4 on the end; the cylinder of character wheel 5 on average equidistantly is printed with 0～9 number; end face on average is divided into 30 covering of the fan 5A and 5 concentric circles 5B; concentric circles 5B is divided into 30 groups of circular arcs by covering of the fan 5A; circular arc constitutes one group among the same covering of the fan 5A; each group circular arc press one group of 5 coding of Gray code (or other binary code as 8421 yards etc.) formation; the circular arc of corresponding " 1 " position among the covering of the fan 5A; be equipped with the arc groove (5C) that connects both sides; between adjacent character wheel 5, be provided with coding and read probe bracket 8; the shell inner bottom part is fixed with printed circuit board (PCB) 7; support 8 is fixed on the printed circuit board (PCB) 7; in order to protect printed circuit board (PCB) 7 and components and parts; preferably apply one deck protection glue thereon; the two sides of support 8 homeotropic alignment respectively is provided with that to read probe 6 be each 5 of infrared transmitting tube and receiving tubes; respectively corresponding five concentric circless; reading circuit is arranged on the printed circuit board (PCB) 7; by single-chip microcomputer U1 (model is EM7810153E) is core; infrared transmitting tube and receiving tube 6 are arranged with the input/output port formation scanning of single-chip microcomputer U1 in the old mode of square and are read in circuit, and data draw signal wire outward and power lead is connected with the external data collector through connector P1.

The principle of work of electronically readable counter is: after reading the circuit energized, single-chip microcomputer U1 scans infrared transmitting tube and receiving

tube

6,5 infrared transmitting tubes being located at character wheel 5 one sides send infrared ray, partly infrared ray passes arc groove 5C by 5 receiving tubes receptions being located at opposite side, according to whether receiving infrared ray, host scm U1 obtains corresponding five binary codings, just can determine the reading of character wheel 5 this moment, and by data line reading is passed in the external data collector.

The defective that the utility model has also solved the mechanical type character wheel counter is the critical reading problem of carry, the critical reading problem of so-called carry is exactly because mechanical type character wheel counter carry advances not to be the moment carry, but will carry the time, low word wheel drive carry gear 2 drives high-order character wheel to be changeed together, and the cooperation between the gear exists certain clearance inevitably, be easy to like this to occur that number between the character wheel 5 slightly has dislocation and the situation that occurs misreading, as " 29 " are thought by mistake " 39 ", in order to address the above problem, end face with character wheel 5 in embodiment of the present utility model is divided into 30 covering of the fan 5C, make each digital corresponding 3 covering of the fan, press the rotation direction of character wheel 5, we might as well be called these 3 covering of the fans " going up lattice ", " positive lattice ", " following lattice ", the external data collector can be easy to make accurate differentiation according to the reading of being gathered like this:

When going to " 0 " number on lattice as: individual position wheel, ten wheels " 3 " are counted when going to lattice, just know that ten wheels former " 2 " count carry " 3 " and count.(reading 30)

Also when " 2 " several lattice down, just know that ten wheels do not have carry (reading 29 like this) as: ten wheels.

When going to " 9 " several lattice down, on ten wheels " 3 " number during lattice, just know that ten have been taken turns carry (such reading 29 or 30) as: individual position wheel.

Claims

1, a kind of electronically readable counter, comprise shell, several cylinders of being located in the shell with coaxial manner are printed on digital character wheel and carry gear, the transmission gear interlock that lowest order (being generally the right) character wheel and shell are outer, the lowest order character wheel whenever circles, rotate a constant angle through the adjacent character wheel of carry gear drive, successively step by step to high-order character wheel transmission, it is characterized in that: character wheel (5) end face circumference is divided into some covering of the fans (5A), each covering of the fan is encoded successively, make covering of the fan (5A) corresponding one by one with coding, between adjacent character wheel (5), be provided with coding and read probe (6) and read circuit, and be provided with the outer signal wire that draws.

2, electronically readable counter according to claim 1, it is characterized in that: character wheel (5) end face is provided with several concentric circless of isolating mutually (5B), (5A) is divided into the plurality of sections circular arc by covering of the fan, circular arc in the same covering of the fan (5A) constitutes one group, reading probe (6) is made of infrared/receiving tube, read circuit and be made of for core single-chip microcomputer (U1), single-chip microcomputer (U1) adopts the EM78P153E type, according to same group of circular arc this group binary coding is read in ultrared reaction.

3, electronically readable counter according to claim 1 and 2, it is characterized in that: character wheel (5) end face circumference is divided into 30 covering of the fans (5A), be provided with 5 concentric circless (5B), every group coding is made of 5 scale-of-two, be printed on 0～90 number on character wheel (5) cylinder, each digital corresponding three covering of the fan (5A).

4, electronically readable counter according to claim 1 and 2 is characterized in that: binary coding adopts Gray code.

5, electronically readable counter according to claim 3 is characterized in that: binary coding adopts Gray code.