CN2754065Y - Optical fiber turbo electronic water meter - Google Patents

Abstract

The utility model relates to a liquid flow counting device compose of an optical fiber turbine and an electric signal processing circuit, particularly an optical fiber turbo electronic water meter. A flow detection circuit is composed of a counting light source, a measuring circuit and a display circuit. An independent component fiber turbine is formed by the straight line movement of a water inlet, a flow guide, a turbine and a bearing in a shell body. A multimode fiber probe on the upper part of the shell body aims at the turbine and is electrically communicated with the signal processing circuit. Vanes of the turbine are coated with reflecting films. The device collects counting pulse formed by light beams emitted by the light source back reflected by the vanes of the turbine, the collected signals are sent to a counting display circuit through an amplification circuit, a filtering circuit and a Schmitt's shaping circuit, and then an LCD displays reading numbers. The utility model can be used for families and industrial circles instead of the existing mechanical type liquid flow rate meters. In addition, the utility model has the advantages of safety, high accuracy, etc.

Description

Optical fiber turbine electronic water meter

Technical field:

The utility model relates to a kind of fluid flow counting equipment that is used for occasions such as family, factory and enterprise, office building, and particularly a kind of fluid flow that is made of counting light source, metering circuit, control circuit and display circuit detects the optical fiber turbine electronic water meter of usefulness.

Technical background:

Existing water meter is to adopt mechanical type to measure fully and counting shows, utilizes the engagement Billy between gear to realize the conversion that everybody is digital, because the pivoting friction between its each parts and inaccurate when low discharge is measured, even quits work and maybe will not count during measurement.At present, though the liquid meter water meter that adopts sensor technology to realize measuring flow is arranged in some occasions, replaced mechanical devices fully with electron device, but this substituted electronic sensing type water meter is easy to be subjected to the influence of factors such as electromagnetism, temperature and vibration and makes measuring accuracy imprecise, and its structural behaviour is unreliable.End is got up, and existing fluid flow counting assembly or tap water meter all exist defective on its measurement range, degree of accuracy, security and antijamming capability.

Summary of the invention:

The purpose of this utility model is to overcome existing liquid flow mearuement equipment and has that measurement range is little, the low discharge measuring accuracy is low and be subject to the shortcoming that factor such as electromagnetism temperature is disturbed, seek to design and a kind of reflective optical sensor is combined with traditional turbine flow measuring principle, with Y type multimode optical fiber is transmitting illuminant, utilize the light activated element acquired signal to measure secondary speed, and then measure the device of flow.Being reflected the count pulse that forms by the light beam to light emitted by turbo blade gathers, the signal gathered is delivered to single-chip microcomputer after by amplification, filtering, Si Mite shaping circuit, deposit data-carrier store in, by the keyboard input instruction, single-chip microcomputer will drive liquid crystal display circuit according to institute's input instruction and show corresponding data again.

In order to realize the foregoing invention purpose, the photo-electric liquid flow measurement device that the utility model constitutes is an optical fiber turbine electronic water meter, mainly form by optical fiber turbine and signal processing circuit two large divisions, wherein the optical fiber turbine is combined by water inlet, housing, air deflector, probe, turbine, bearing and water delivering orifice as individual components, and signal processing circuit mainly is made up of photoelectric switching circuit, metering circuit, control circuit and display circuit four parts.Water inlet, air deflector, turbine, bearing and water delivering orifice straight line in housing moves towards to form eddy current type liquid stream and drives turbine rotation, is formed on the multimode optical fiber alignment probe turbine on housing top, and with the signal processing circuit electric connection.Existing certain proportion to close according to the flow velocity of secondary speed and water is the basis, adopt Y type multimode optical fiber probe, the reflectance coating of plating one deck high reflectance on the blade of conventional structure turbine, current make the turbine rotation when flowing into through turbine by water inlet, optical fiber is luminous to shine on the turbo blade, reflect on certain angle, another road optical fiber is given in coupling, receives light signal and makes the photodiode conducting produce electric signal.Whether the conducting that whether has reflected light to reflect will to influence photodiode produces high-low level, through amplifying, behind the shaping circuit, produce regular pulse signal and send into the single-chip microcomputer of signal processing circuit, and data are handled by single-chip microcomputer, store, show and management.Metering circuit comprises conventional photoelectric switching circuit, Si Mite shaping circuit; Photoelectric switching circuit mainly is made up of photodiode and operational amplifier, it converts photocurrent variations the variation of voltage to and amplification is arranged, the Si Mite shaping circuit is a square-wave pulse with the irregularity wave shaping that has burr of amplifier output, supplies with the back level and does input.Operational amplifier meets positive and negative 15V respectively, in-phase end links to each other with photodiode, photodiode other end ground connection, the operational amplifier end of oppisite phase is by a resistance eutral grounding, the R4 of feedback branch and C2 form low-pass filter again, output signal links to each other with this schmitt trigger, and this schmitt trigger output signal connects single-chip microcomputer P3.5 end, and by the Micro Controller Unit (MCU) driving display circuit.Its principle of work: unglazed photograph, photodiode is high-impedance state, and this moment output is almost equal to zero, and when reflected light shines in photodiode D, the D conducting is output as high level.The utilization of this circuit has or not reflected light to shine photodiode to produce high-low level, forms count pulse.After single-chip microcomputer detects the pulse signal of P3.5 mouth, opening entry, and add up.Single-chip microcomputer is keyboard scan simultaneously, sees if there is the keyboard input.If input signal is arranged, then according to the queried for items of signal by Micro Controller Unit (MCU) driving display circuit explicit user.Display circuit shows with 6 liquid crystal digitals of low-power consumption.

Characteristics such as the utility model is compared with the technology of existing liquid flow mearuement device, has novel structure, and circuit is simple, and stability is high, measures accurately, and antijamming capability is strong, shows rapidly, and measurement range is big.Adopt reflective optical sensor and turbine measuring principle, utilize illumination to reflect to form count pulse to turbo blade, turbine contact with miscellaneous part, so the interference of the electromagnetism temperature that almost do not rub, and be not subjected to during turbine rotation.The utility model has broad prospect of application at worker, farming, civil area, especially has wide application space in the family expenses field.

Description of drawings:

Fig. 1 is the optical fiber turbine structure principle schematic of the utility model.

Fig. 2 is the electric signal processing circuit theory structure synoptic diagram of the utility model.

Specific embodiments:

The utility model is with the optical fiber turbine and by photoelectric switching circuit, metering circuit, control circuit, the electric signal processing circuit that display circuit is formed is communicated with and forms a single unit system by electrical principles photoelectricity, electric signal processing circuit schematic circuit routinely connects to form, the optical fiber turbine is by water inlet 1, housing 2, air deflector 3, probe 4, turbine 5, bearing 6 and water delivering orifice 7 are formed the independent monomer of straight line trend, butt joint is installed in liquid or the water supply pipe, by the photo-electric conversion element and the electric signal processing circuit of popping one's head in 4 is the single chip circuit electric connection, and is communicated with the transmission and the demonstration of control and display circuit realization signal.Photoelectric switching circuit core component operational amplifier A is elected μ A725 model as, and with positive and negative 15 volts of power supplys, R5 is a variable resistor, and sensor is photodiode D, and Si Mite shaping circuit C selects CD40106 for use.Single-chip microcomputer B selects 8051 for use.The address latch E that links to each other with single-chip microcomputer B is the 74LS373 type, selects 8279 for use as keyboard/display control circuit F, connects display circuit by BIC8708 type interface G circuit.Display adopts six one LCDs.Other component values are: R1=51K Ω, R2=100K Ω, R3=91K Ω, R4=1M Ω, R5=100K Ω, R6=510 Ω, R7=510 Ω, R8=200 Ω, R9=100K Ω, C1=4.7 μ F, C2=0.1 μ F, C3=100pF, C4=220pF, C5=0.1 μ F.

The work that this device application software need be finished has: detect pulse, pulse count stores and shows this water consumption, this water consumption per month, and nearest 12 months each water consumption per month, the accumulative total water consumption, the under-voltage record of battery, is torn table record open at the artificial destruction record.Can carry out programmed according to conventional method, and the machine code after technology will compile routinely is cured in the storer of single-chip microcomputer.

The use of the utility model circuit: the butt joint of this device is installed in liquid or the tap water conveyance conduit, opens sluice, after the energized (220V), automatically open and carry out conventional flow counting and demonstration, need not monitoring, when checking the water record, only need to get final product by corresponding button.

Claims (1)

1. optical fiber turbine electronic water meter, form by optical fiber turbine and signal processing circuit two parts, it is characterized in that water inlet, air deflector, turbine, bearing and water delivering orifice straight line in housing moves towards to form individual components optical fiber turbine, be formed on housing top multimode optical fiber alignment probe turbine and with the signal processing circuit electric connection, be coated with reflectance coating on the turbo blade; Operational amplifier meets positive and negative 15V respectively, in-phase end links to each other with photodiode, photodiode other end ground connection, the operational amplifier end of oppisite phase passes through resistance eutral grounding, the R4 of feedback branch and C2 form wave filter, output signal links to each other with this schmitt trigger, and the trigger output signal connects single-chip microcomputer P3.5 end, and driving display.

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