CN104964723B - A kind of passive flow sensor and passive flow measurement display control program - Google Patents
A kind of passive flow sensor and passive flow measurement display control program Download PDFInfo
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- CN104964723B CN104964723B CN201510397133.1A CN201510397133A CN104964723B CN 104964723 B CN104964723 B CN 104964723B CN 201510397133 A CN201510397133 A CN 201510397133A CN 104964723 B CN104964723 B CN 104964723B
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Abstract
The present invention relates to a kind of passive, flow sensor and passive flow measurement display control programs, this passive flow sensor includes: sensor body, the impeller suitable for fluid driven rotation is installed in sensor body front end, wherein the blade of the impeller is magnetic leaf；And the passive flow sensor further include: the coil that the magnetic field suitable for generating with impeller rotation is coupled, the coil output are connected with the signal output line for being located at sensor body；Passive flow sensor of the invention and the flow apparatus for installing the sensor realize flow sensor and work normally under conditions of passive, get rid of the limitation that traditional Hall sensor relies on power supply, it can be suitble to carry out fluid flow rate, flow measurement, display in field, the occasion without external power supply power supply, and have the advantages that easy to use and reliable, structure is simple to manufacture.
Description
Technical field
The present invention relates to a kind of flow sensors more particularly to a kind of passive flow sensor and passive flow measurement to show
Control system.
Background technique
Sensing device currently used for measuring flow rate of water flow is commonly referred to as flow sensor.But traditional flow sensor
Realize that flow counts by components such as Hall sensor, impellers, and the work of Hall sensor needs one dependent on independently-powered
Fixed power consumption；Due to being active device, just easily there is external disturbance coupled voltages, electric current, temperature, noise excessively it is high it is extraneous because
Element damage is dangerous.
Therefore, in special certain special occasions, if there is electric leakage or interference in external environment, flow sensor is easily caused
Damage or detection error.
Summary of the invention
The object of the present invention is to provide a kind of passive flow sensor and passive flow measurement display control programs, to solve
Traditional flow sensors rely on external power supply and the technical problems such as easy to damage.
In order to solve the above-mentioned technical problems, the present invention provides a kind of passive flow sensors, comprising: sensor body,
The impeller suitable for fluid driven rotation is installed in sensor body front end, wherein the blade of the impeller is magnetic leaf；And
The passive flow sensor further include: the coil that the magnetic field suitable for generating with impeller rotation is coupled, the coil is in leaf
AC signal is exported when wheel rotation, this signal and wheel speed are directly proportional, while the exchange exported is flow measurement display control
System provides power supply；The output end of the coil is connected with the signal output line for being located at sensor body.
Further, the passive flow sensor further include: the input terminal of comparison circuit, the comparison circuit is connected to coil
Output end, the output end of the comparison circuit connects processor module, which is also connected with Liquid Crystal Module；And institute
The output end for stating coil is also connected with the main input terminal for taking electric unit, and the master takes electric unit to be suitable for the comparison circuit, processing
The power supply of device module and Liquid Crystal Module.
Optionally, magnetic sheet is pasted with above the blade.
Optionally, the blade is equipped with the card slot for being adapted for insertion into magnetic stripe.
Preferably, the output end of the coil is also connected with divider resistance.
Another aspect, the present invention also provides a kind of passive flow measurement display control programs, comprising: control unit, institute
It states control unit and connects passive flow sensor described at least one；Described control unit includes: the selection of the first multiplexer channel
Switch, the signal output line of each passive flow sensor passes through respective diode respectively and first multiplexer channel selection switchs
Each input terminal be connected, first multiplexer channel selection switch output end pass through main comparison circuit and main processor modules phase
Even, which is also connected with host liquid crystal module；The control terminal and primary processor mould of the multiplexer channel selection switch
First control output end of block is connected.
Further, described control unit further include: master takes electric unit, which takes the input terminal and a passive flow of electric unit
The signal output line of sensor is connected, which takes the feeder ear of the output end connection described control unit of electric unit.
Further, the master takes the input terminal of electric unit to pass by the second multiplexer channel selection switch and each one passive flow
The signal output line of sensor is connected；Second control of the control terminal and main processor modules of the second multiplexer channel selection switch
Output end is connected；The main processor modules are suitable for the signal frequency control more than second according to the acquisition of each passive flow sensor
Paths select switch to select the highest signal of frequency as the main input signal for taking electric unit.
The beneficial effects of the present invention are: passive flow sensor of the invention and passive flow measurement display control program are real
Show flow sensor to work normally under conditions of passive, gets rid of the limitation that traditional Hall sensor relies on power supply, energy
It is suitble to that more or field etc. is being interfered to power and be routed cumbersome occasion progress fluid flow rate, flow measurement without external power supply, and
Have many advantages, such as that easy to use and reliable, structure is simple, zero-power；And since passive flow sensor itself is being not required to external confession
In the case where electricity, there is corresponding AC wave shape signal to export in wheel rotation, is not only zero-power in itself but also can be right
The advantages that outer power supply, and realize that real passive measurement, passive measurement are shown on the spot or a passive measurement distant place is shown.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the structure chart of passive flow sensor of the invention；
Fig. 2 is the output waveform figure of passive flow sensor of the invention；
Fig. 3 is the functional block diagram of passive flow measurement display control program of the invention.
In figure: impeller 1, coil T.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates basic structure of the invention, therefore it only shows the composition relevant to the invention.
Passive flow sensor of the invention is impeller when rotation, generates induction by permeability magnetic material coupling coil
Ac voltage signal, this signal and wheel speed are directly proportional, and since Inside coil etc. is all passive device, there is no active
The possibility of device damage.
Embodiment 1
As shown in Figure 1, a kind of passive flow sensor of the invention, comprising: sensor body, in sensor body front end
The impeller 1 for being suitable for fluid driven rotation is installed, wherein the blade of the impeller 1 is magnetic leaf；And the passive flow passes
Sensor further include: suitable for the coil being coupled with the magnetic field of the impeller 1 rotation generation, the output end of the coil and positioned at sensing
The signal output line of device ontology is connected.
Passive definition is in the present invention: this passive flow sensor itself is being not required to external power supply or in-line power,
The detection of fluid flow, flow velocity is completed i.e. in power free situation.
The magnetic field that the impeller rotation generates generates induced voltage by coil, and specific induced voltage is as shown in Figure 2.
About the output waveform figure of this passive flow sensor, in Fig. 2, Uo+ and Uo- respectively indicate this passive flow sensing
The output AC wave shape of device, the frequency and fluid flow rate, flow proportional of the AC wave shape.Therefore, waves AC is counted
The frequency of shape can obtain the corresponding flow velocity of detected fluid, data on flows, realize passive flow detection.
Wherein, coil generates corresponding coupled voltages by magnetic flux change, the voltage is at exchange when impeller 1 is rotated
Form output, by counting the frequency of the alternating voltage to obtain measured flux data.
Preferably, in order to realize that passive measurement is shown on the spot, i.e., shown on the passive flow sensor fluid flow,
The data such as flow velocity.The passive flow sensor further include: comparison circuit, the input terminal of the comparison circuit are connected to the defeated of coil
The output end of outlet, the comparison circuit connects processor module, which is also connected with Liquid Crystal Module；And the line
The output end of circle is also connected with the input terminal for taking electric unit, and this take electric unit be suitable for the comparison circuit, processor module and
The power supply of Liquid Crystal Module.The AC signal that this passive flow sensor is obtained by acquisition flow is by taking electric unit to become direct current
The power supply of voltage offer comparison circuit, processor module and Liquid Crystal Module.Wherein, it is described take electric unit include: bridge rectifier electricity
Road, filter circuit and voltage regulator circuit.
As a kind of optional embodiment of magnetic leaf in the present embodiment, magnetic sheet is pasted with above the blade.
As second of optional embodiment of magnetic leaf in the present embodiment, the blade is equipped with and is adapted for insertion into magnetic
The card slot of item.
On the basis of the present embodiment, the output end of the coil is also connected with divider resistance, to realize to this passive flow
The output signal of sensor carries out pressure limiting, to meet the signal input range of subsequent conditioning circuit.
Optionally, the blade quantity is 3-8 piece.
The impeller can also be substituted with turbine.
Accordingly, with respect to the flow sensor of the prior art, passive flow sensor of the invention, due to sensor itself
In the case where not needing any external power supply, just there is corresponding flow waveform signal to export in wheel rotation, not only in itself
The advantages that being zero-power but also can be with supplying power for outside.
Embodiment 2
As shown in figure 3, on that basis of example 1, a kind of passive flow measurement display control program is present embodiments provided,
Including control unit, described control unit connects the passive flow sensor described at least one；Described control unit includes:
One multiplexer channel selection switch, the signal output line of each passive flow sensor pass through respective diode and more than described first respectively
Each input terminal of paths selection switch is connected, and the output end of first multiplexer channel selection switch passes through main comparison circuit and master
Processor module is connected, which is also connected with host liquid crystal module；The control terminal of the multiplexer channel selection switch
It is connected with the first control output end of main processor modules.
Further, described control unit further include: master takes electric unit, which takes the input terminal and a passive flow of electric unit
The signal output line of sensor is connected, which takes the feeder ear of the output end connection described control unit of electric unit.
Further, in order to make control unit obtain long-acting, stable voltage value, the master takes the input terminal of electric unit to pass through
Second multiplexer channel selection switch is connected with the signal output line of each one passive flow sensor；The second multiplexer channel selection
The control terminal of switch is connected with the second control output end of main processor modules；The main processor modules are suitable for according to each passive
The signal frequency of the acquisition of flow sensor controls the second multiplexer channel and selects switch that the highest signal of frequency is selected to take as master
The input signal of electric unit.
Wherein, the master takes the circuit structure of electric unit identical as the circuit structure for taking electric unit.
Optionally, the main processor modules and processor module are suitably selected for low-power scm.
If also, the main processing block is also connected with main line output end, can control outside with exporting corresponding control signal
Connect equipment (such as, but not limited to water pump, solenoid valve etc.).
The main processor modules are also connected with key group.
This passive flow measurement display control program and passive flow sensor data are transmitted, and a passive measurement distant place is realized
Display.
Therefore, this passive flow measurement display control program, i.e., can be real without external power supply departing from the limitation of power supply
Existing fluid flow, flow rate detection.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (1)
1. a kind of passive flow measurement display control program characterized by comprising control unit, described control unit connection
Passive flow sensor described at least one；
The passive flow sensor includes: sensor body, is equipped in sensor body front end and rotates suitable for fluid driven
Impeller, wherein the blade of the impeller be magnetic leaf；
And the passive flow sensor further include:
Suitable for the coil that the magnetic field generated with impeller rotation is coupled, the output end of the coil and positioned at sensor body
Signal output line is connected；
The passive flow sensor further include: the input terminal of comparison circuit, the comparison circuit is connected to the output end of coil, should
The output end of comparison circuit connects processor module, which is also connected with Liquid Crystal Module；
And the output end of the coil is also connected with the input terminal for taking electric unit, and this takes electric unit suitable for electric to the comparison
The power supply on road, processor module and Liquid Crystal Module；
Described control unit includes: the first multiplexer channel selection switch, and the signal output line of each passive flow sensor leads to respectively
Respective diode is crossed to be connected with each input terminal of first multiplexer channel selection switch, first multiplexer channel selection switch
Output end is connected by main comparison circuit with main processor modules, which is also connected with host liquid crystal module；
The control terminal of the multiplexer channel selection switch is connected with the first control output end of main processor modules；
Described control unit further include: the main input terminal for taking electric unit passes through the second multiplexer channel selection switch and each passive flow
The signal output line of quantity sensor is connected；The master takes the feeder ear of the output end connection described control unit of electric unit；
The control terminal of the second multiplexer channel selection switch is connected with the second control output end of main processor modules；
The main processor modules are suitable for controlling the second multiplexer channel according to the signal frequency of the acquisition of each passive flow sensor
Switch is selected to select the highest signal of frequency as the main input signal for taking electric unit.
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| CN201510397133.1A CN104964723B (en) | 2015-07-08 | 2015-07-08 | A kind of passive flow sensor and passive flow measurement display control program |
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| CN104964723B true CN104964723B (en) | 2018-12-04 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107525548B (en) * | 2016-06-20 | 2019-09-06 | 桓达科技股份有限公司 | Self power generation web flowmeters |
| CN111649847A (en) * | 2020-05-28 | 2020-09-11 | 广东万和新电气股份有限公司 | Alarm control method and alarm system for shower |
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| CN1225447A (en) * | 1998-02-07 | 1999-08-11 | 浙江大学 | Passive instantaneous flowmeter |
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