CN201281617Y

CN201281617Y - Photo-electric fluid flow sensor

Info

Publication number: CN201281617Y
Application number: CNU200820106145XU
Authority: CN
Inventors: 万书亭; 何玉灵
Original assignee: North China Electric Power University
Current assignee: North China Electric Power University
Priority date: 2008-10-10
Filing date: 2008-10-10
Publication date: 2009-07-29
Anticipated expiration: 2018-10-10

Abstract

A photoelectric fluid flow sensor belongs to the technical field of metering and is used to solve the problems of flow measurement and computerized automatic billing of fluid flow. Its technical solution is: it is composed of a casing, an impeller, a signal processing chamber and a reflective photoelectric sensor, the two ends of the casing are provided with a liquid inlet and a liquid outlet connected to the fluid pipeline, and the signal processing chamber is connected to On the port in the middle of the shell, the signal processing room is a sealed chamber, and a transparent window is provided at the connection with the port of the shell, and the reflective photoelectric sensor is installed in the signal processing room; the impeller is installed in the shell, corresponding to the reflective photoelectric sensor The reflector is installed in the middle of the impeller shaft. The utility model has the advantages of simple structure and reliable operation, and can output a square wave signal whose frequency is proportional to the flow velocity of the fluid in the pipeline. After being connected with a single-chip microcomputer, the utility model can form an electronic billing instrument to realize automatic billing.

Description

A kind of photo-electric flow sensor

Technical field

The utility model relates to a kind of flow sensor, and particularly a kind of electro-optical pickoff that is applicable to electronic flowmeter amount instrument belongs to field of measuring techniques.

Background technology

At present, electronic prepayment IC-card measuring instrument (as electric energy meter, gas meter, flow meter etc.) is extensively adopted by people already because of having the advantage of being convenient to manage, but still adopt traditional mechanical type instrument the fluid metering instrument (as water meter), this is because flow sensor is mechanical impeller mechanism mostly, this mechanism is immersed in and carries out work in the fluid, be difficult to dispose the electrical type device, the flow signal of output can not be converted to the suitable employed electric signal of electronic type measuring instrument, this makes existing apparatus for metering fluids be difficult to taking off automatically of the expense that realizes.

Though occurred the dry-reed flow sensor in recent years, this sensor is easy to be subjected to the interference of external magnetic field, causes sensor misalignment or inefficacy, thereby neither a kind of desirable electronic type flow sensor.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of photo-electric flow sensor that is applicable to that electronic flowmeter amount instrument is used is provided.

The alleged problem of the utility model realizes with following technical proposals:

A kind of photo-electric flow sensor, it is made up of shell, impeller, signal Processing chamber and reflective photoelectric sensor, described shell two ends are provided with inlet and the liquid outlet that is connected with fluid circuit, described signal Processing chamber is connected on the shell central port, the signal Processing chamber is a sealed chamber, itself and outer cover port junction are provided with transparency window, and it is indoor that reflective photoelectric sensor promptly is installed in signal Processing; Described impeller is installed in the shell, and the refractive body corresponding with reflective photoelectric sensor is installed in the rotating shaft of impeller.

Above-mentioned photo-electric flow sensor, described refractive body is loaded on the middle part of impeller shaft, and the blade of described impeller is divided into two groups, is symmetrically distributed in the both sides of refractive body along rotating shaft.

The utility model utilizes reflective photoelectric sensor to gather the fluid flow signal, and this conversion of signals is become to be fit to the employed pulse electrical signal of electronic type measuring instrument, and power supply minor measuring instrument uses.Refractive body is used for the laser-bounce that light emitting diode sent in the reflective photoelectric sensor to photoelectric tube; make the electric impulse signal of photoelectric tube output reflection fluid flow; the effect of transparency window is with photoelectric sensor and fluid isolation; the insulation safety of protection photoelectric sensor; the signal Processing chamber both shielded to photoelectric sensor, was again the web member of shell and transparency window.The utility model is simple in structure, reliable operation, and the square-wave signal that can output frequency be directly proportional with the pipeline inner fluid speed and can constitute the electronics tariff meter, the realization automatic charging after single-chip microcomputer is connected.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further specified.

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

Fig. 2 is photoelectric sensor and blade wheel structure synoptic diagram.

Each label is among the figure: 1, shell; 2, impeller; 3, signal Processing chamber; 4, reflective photoelectric sensor; 5, photoelectric tube; 6, light emitting diode; 7, refractive body; 8, blade; 9, rotating shaft; 10, liquid outlet; 11, inlet; 12, transparency window.

Embodiment

The utility model is can't be automatically carry out Electronic Data Processing according to the fluid flow that flows through in the pipeline at the conventional fluid measuring apparatus to charge, and can't be extensive use of this problem in all kinds of fluids such as liquid, gas and custom-designed.

Referring to Fig. 1, shell 1 two ends are provided with inlet 11 and the liquid outlet 10 that is connected with fluid circuit, the impeller 2 of a band refractive body 7 is installed in the shell 1, when fluid flows into from inlet 11, during from liquid outlet 10 outflows, can promote impeller 2 rotations, the rotational speed of impeller 2 is directly proportional with the flowing velocity of fluid.The middle part of shell 1 is connected with 3 lower ends, signal Processing chamber by screw thread, signal Processing chamber 3 is one with

transparency window

12,3 lower ends, signal Processing chamber are by transparency window 12 sealing, fluid because of the thread seal of shell 1 and transparency window 12 can't entering signal process chamber 3 in, thereby guaranteed indoor insulativity.Reflective photoelectric sensor 4 is housed in the signal Processing chamber 3, and the light emitting diode in the reflective photoelectric sensor 4 is by external power source, and the light beam that the condensation degree that it sends is very high passes the middle part that transparency window 12 shines the rotating shaft 9 of impeller 2.Whenever impeller rotates a circle, refractive body 7 in the middle of the impeller will reflect the light beam of once being injected by light emitting diode 6, photoelectric tube 5 receives folded light beam just can export a high level signal, what impinge upon photoelectric tube 5 outputs when not pasting refractive body regional when the light beam of light emitting diode 6 is a low level signal, impeller 2 whenever rotates a circle and all can make photoelectric tube 5 high level of output and low levels like this, so repeatedly, photoelectric tube 5 will be exported a row square wave.The frequency of square wave then with the rotational speed of impeller, the flow velocity that is the pipeline inner fluid is directly proportional, thereby can calculate the fluid volume that flows through in the pipeline by the square-wave pulse number of output, the square-wave pulse access electronic charge account equipment of output can be realized taking off automatically expense as count signal.

Referring to Fig. 2, refractive body 7 is loaded on the middle part of the rotating shaft 9 of impeller 2, and blade 8 is divided into two groups, and symmetry is installed on the both sides of refractive body 7, and it is to be convenient to install refractive body 7 that blade 8 adopts the purpose of this minute body structure, and makes the impeller stress equalization.

The utility model can be used for the occasion that water dispenser, bathhouse, gas conveying tube etc. need measure and charge various fluid flows.

Claims

1. A photoelectric fluid flow sensor, characterized in that it consists of a casing (1), an impeller (2), a signal processing chamber (3) and a reflective photoelectric sensor (4), and the two ends of the casing (1) There is a liquid inlet (11) and a liquid outlet (10) connected to the fluid pipeline. The signal processing chamber is connected to the middle port of the housing. The signal processing chamber is a sealed chamber. A transparent window (12) is provided, and the reflective photoelectric sensor is installed in the signal processing chamber; the impeller is installed in the casing, and the reflector (7) corresponding to the reflective photoelectric sensor is installed on the rotating shaft of the impeller.

2. The photoelectric fluid flow sensor according to claim 1, characterized in that, the reflector (7) is installed in the middle of the shaft (9) of the impeller (2), and the blades (8) of the impeller (2) ) are divided into two groups, symmetrically distributed on both sides of the reflector along the rotation axis.