CN2544353Y

CN2544353Y - Contactless read out device for machanical character wheel counter

Info

Publication number: CN2544353Y
Application number: CN 02211551
Authority: CN
Inventors: 刘明姣
Original assignee: Individual
Current assignee: Zhang Ange
Priority date: 2002-04-30
Filing date: 2002-04-30
Publication date: 2003-04-09
Anticipated expiration: 2012-04-30

Abstract

The utility model discloses a non-contact reading device of a mechanical print wheel counter. The utility model utilizes the light reflex theory, converts optical signal to encoding data of electrical signal, and achieves the function of reading numerical value indicated by a print wheel of the mechanical print wheel counter in a non-contact way. The utility model comprises a bracket, a reflector sticker, and an optical fiber and phototriodes. Seven phototriodes and more than one light emitting diode that can be assembled with the phototriodes are arranged on a circuit wafer on the top of the bracket, the lower part of the bracket is opened with an optical fiber orifice, and a print wheel is arranged at the lower part of the bracket, and the reflector sticker is attached to the print wheel. The distance between the bracket and the reflector sticker is less than 3 millimeters, and the optical fiber is taken as an optical channel between the seven phototriodes and the seven optical fiber orifices.

Description

A kind of mechanical character wheel counter non-contact reading device

Technical field:

The utility model relates to technical field of data recognition in the measuring technique, and exactly it is a kind of mechanical character wheel counter non-contact reading device.

Background technology:

Mechanical rotary-type counter is widely used on ammeter, gas meter, mileometer and other accumulative total formula measuring instrument, and simple in structure and reliable operation is stablized owing to it, in period, all is an irreplaceable metering method at suitable phase of history.Yet, because the development of technology, require this gauging instrument to export the metering result in the electronic digitalizing mode, with further with remote transmission or directly deliver to computer and carry out data processing, thereby and this class instrument owing to there is not corresponding electronic digitalizing output device to bring significant problem to metering automation.For the metering of water meter of installing in the residential building building and gas meter, the resident is unwilling usually to allow to table look-up for safety and tables look-up in people's inlet chamber.And the digitizing of this kind equipment, current solutions is to carry out digital processing by the pulsed counting, promptly by the number of revolutions of a certain rotatable parts of this instrument is carried out pulse output metering by optomagnetic or resonant inducing mode etc., revolution is moving once just to be exported a pulse or pulsegroup and carries out digitized processing by one-chip computer again and added up and store.There is following shortcoming in this mode:

One, this pulse digit mode is not to read the metering result on measuring instrument, but carries out the electronic type metering again, like this, has just formed and carried out double metering (being original mechanical type metering and additional pulsed metering) on same instrument.The electronic digit of being exported not is the metering result of former instrument, but the result of additional electron metering.

Two, the electronics metering method is subject to disturb, as thunder and lightning, power-supply fluctuation and various power current to interference of circuit or the like, thereby the accuracy of influence metering.And disturbed each time among the permanent result who is present in metering of the mistake metering that is produced, in other words, the metering mistake can accumulate.

Three, must carry out end number of degrees initialization process.Because the just metering of process of pulsed metering, its final metering must be transferred to computing machine (or single-chip microcomputer) and handle and store, so degree was handled at the bottom of each measuring instrument all need carry out electronization.This in many cases (when installing) as large quantities of watt-hour meter be very inconvenient.

Four, pulse metering device must guarantee in the overall process of metering in running order all the time, some measuring instruments are (as watt-hour meter, water meter, the gas meters etc.) that are in free of discontinuities work year in year out, the corresponding pulses measuring apparatus is continuous working accordingly also, therefore produced two problems: 1, corresponding electronic device must guarantee long-term substantially error-free work continuously, otherwise its metering result has very big discrepancy; 2, long-term continuous working produces the life problems of device inevitably, and particularly sensor is especially true.

Summary of the invention:

The purpose of this utility model provides a kind of mechanical character wheel counter non-contact reading device, it utilizes light reflection principle, light reflected signal power according to the reflecting strips that is installed in the character wheel surface, convert reflected light signal the electric signal coded data of character wheel anglec of rotation correspondence to by processing of circuit, thereby realize that the noncontact mode reads the function of mechanical type character wheel counter character wheel indication numerical value.It comprises support, reflecting strips, circuit board, optical fiber, light emitting diode and phototriode, it is characterized in that: 7 phototriodes (1) are housed on support (5) the upper circuit plate (3), can be equipped with 1 above light emitting diode (2) with phototriode (1), the bottom of support (5) has optic fibre hole (7), character wheel (8) is equipped with in support (5) bottom, post reflecting strips (6) on the character wheel (8), the distance of support (5) and reflecting strips (6) adopts optical fiber (4) as optical channel less than 3 millimeters between 7 phototriodes (1) and 7 optic fibre holes (7).Reflecting strips (6) on the character wheel (8) is with 8 sections reflective section chequered with black and white and non-reflective section formations.7 optic fibre holes (7) are along 9 °～15 ° of character wheel periphery and character wheel concentric spacings.On the reflecting strips (6) 8 sections reflective section and non-reflective section length is with character wheel center of circle angle tolerance, mixed by 17.1 °, 21.4 °, 30 °, 42.9 °, 47.1 °, 55.7 ° and 90 ° of 7 kinds of angles respectively and forms.

The utility model has the advantages that: the utility model can be realized the remote data transmission, is not subject to the interference of factors such as thunder and lightning, power-supply fluctuation, the accuracy height, easy to use, life-span is long, can not produce cumulative errors, has realized that the noncontact mode reads the function of mechanical type character wheel counter indication numerical value.

Description of drawings:

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is an optic fibre hole distribution schematic diagram in the utility model.

Fig. 3 is the distribution schematic diagram of reflecting strips among a kind of embodiment in the utility model.

Embodiment:

Embodiment 1:

Character wheel 8 is basic identical with existing character wheel in the utility model, only be stained with reflecting strips 6 on character wheel 8 surfaces, reflecting strips 6 according to the angle black and white of preceding chatting at interval, circuit board 3 is housed on the support 5, phototriode 1 is contained on the circuit board 3, infrarede emitting diode 2 also is contained on the circuit board 3, infrarede emitting diode 2 1～7 of installation all can, every infrarede emitting diode 2 and phototriode 1 all have optical fiber 4 to draw from the top, every group optical fiber 4 is installed in the same optic fibre hole 7 of

support

5,7 optical fiber 4 pilot holes and 1 group of 7 groups of infrarede emitting diodes 2 and phototriode and to be connected optical fiber 4 corresponding on the support 5, every group of optical fiber 4 passes fixing optical fiber 4 fixed orifices, by support 5 be fixed on the corresponding assigned position in character wheel 8 centers of circle on.The Infrared that infrarede emitting diode 2 sends is radiated on the reflecting strips 6 on the character wheel 8 by optical fiber 4, and the light that reflecting strips 6 reflects is transmitted back on the corresponding phototriode 1 by the optical fiber 4 with the hole again, is converted level signal output.On the reflecting strips on the character wheel 86, interval in accordance with regulations scribbles 8 sections chequered with black and white stripeds, is absorbed at blacking part light, and non-blacking part light is reflected.When infrarede emitting diode 2 electrified light emittings, the light power of 7 groups of optical fiber 4 reflected backs changes according to the position difference of reflecting strips black and white strip, thereby produces the code level signal relevant with character wheel 8 anglecs of rotation on the output terminal of 7 phototriodes 1.

Embodiment 2:

By 90 °, 21.4 °, 21.4 °, 21.4 °, 47.1 °, 21.4 °, 90 ° distributions (seeing accompanying drawing 3), other is with embodiment 1 along character wheel 8 circumference for chequered with black and white reflecting strips 6 on the character wheel 8.

Claims

1, a kind of mechanical character wheel counter non-contact reading device, it comprises support, reflecting strips, circuit board, optical fiber, light emitting diode and phototriode, it is characterized in that: 7 phototriodes (1) are housed on support (5) the upper circuit plate (3), can be equipped with 1 above light emitting diode (2) with phototriode (1), the bottom of support (5) has optic fibre hole (7), character wheel (8) is equipped with in support (5) bottom, post reflecting strips (6) on the character wheel (8), the distance of support (5) and reflecting strips (6) adopts optical fiber (4) as optical channel less than 3 millimeters between 7 phototriodes (1) and 7 optic fibre holes (7).

2, a kind of mechanical character wheel counter non-contact reading device according to claim 1 is characterized in that: the reflecting strips (6) on the character wheel (8) is with 8 sections reflective section chequered with black and white and non-reflective section formations.

3, a kind of mechanical character wheel counter non-contact reading device according to claim 1 is characterized in that: 7 optic fibre holes (7) are along 9～15 ° of character wheel periphery and character wheel concentric spacings.

4, a kind of mechanical character wheel counter non-contact reading device according to claim 1, it is characterized in that: on the reflecting strips (6) 8 sections reflective section and non-reflective section length is with character wheel center of circle angle tolerance, mixed by 17.1 °, 21.4 °, 30 °, 42.9 °, 47.1 °, 55.7 ° and 90 ° of 7 kinds of angles respectively and forms.