CN104964723A - Passive flow sensor and passive flow measurement and display control system - Google Patents
Passive flow sensor and passive flow measurement and display control system Download PDFInfo
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- CN104964723A CN104964723A CN201510397133.1A CN201510397133A CN104964723A CN 104964723 A CN104964723 A CN 104964723A CN 201510397133 A CN201510397133 A CN 201510397133A CN 104964723 A CN104964723 A CN 104964723A
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- passive flow
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Abstract
The invention relates to a passive flow sensor and a passive flow measurement and display control system. The passive flow sensor comprises a sensor body, an impeller suitable for being driven by fluid to rotate is arranged at the front end of the sensor body, and magnetic blades are adopted as blades of the impeller. The passive flow sensor further comprises a coil suitable for being coupled with a magnetic field generated by rotation of the impeller, and the output end of the coil is connected with a signal output line on the sensor body. According to the passive flow sensor and a flow device with the sensor, the flow sensor can normally work under passive conditions, the limit that a traditional Hall sensor depends on a power source is removed, the flowing speed and flow of the fluid can be measured and displayed in the open air and on occasions without external power source power supply, and the advantages of being convenient and reliable to use and simple in structural manufacturing are achieved.
Description
Technical field
The present invention relates to a kind of flow sensor, particularly relate to a kind of passive flow quantity sensor and passive flow measurement display control program.
Background technology
Flow sensor is commonly referred to as at present for the induction installation measuring flow rate of water flow.But traditional flow sensor realizes flow counting by the parts such as Hall element, impeller, and the work of Hall element depends on independently-powered, needs certain power consumption; Owing to being active device, just very easily there is external disturbance coupled voltages, electric current, temperature, noise is crossed high extraneous factor and is damaged dangerous.
Therefore, at some special occasions special, if there is electric leakage or interference in external environment condition, then easily cause flow sensor to damage or metrical error.
Summary of the invention
The object of this invention is to provide a kind of passive flow quantity sensor and passive flow measurement display control program, rely on externally fed and the technical matters such as fragile to solve traditional flow sensors.
In order to solve the problems of the technologies described above, the invention provides a kind of passive flow quantity sensor, comprising: sensor body, be provided with the impeller being suitable for fluid driven and rotating in sensor body front end, wherein the blade of this impeller is magnetic leaf; And described passive flow quantity sensor also comprises: the coil that the magnetic field being suitable for producing with described vane rotary is coupled, this coil is output AC signal when vane rotary, this signal and wheel speed are directly proportional, and the interchange simultaneously exported provides power supply for flow measurement display control program; The output terminal of this coil is connected with the output line being positioned at sensor body.
Further, described passive flow quantity sensor also comprises: comparator circuit, and the input end of this comparator circuit is connected to the output terminal of coil, the output terminal connection handling device module of this comparator circuit, and this processor module is also connected with Liquid Crystal Module; And the output terminal of described coil also connects the input end of main power taking unit, and this main power taking unit is suitable for the power supply to described comparator circuit, processor module and Liquid Crystal Module.
Optionally, magnetic sheet is pasted with above described blade.
Optionally, described blade is provided with the draw-in groove being suitable for inserting magnetic stripe.
Preferably, the output terminal of described coil is also connected with divider resistance.
Another aspect, present invention also offers a kind of passive flow measurement display control program, comprising: control module, described control module connects the passive flow quantity sensor described at least one; Described control module comprises: the first multiplexer channel selector switch, the output line of each passive flow quantity sensor is connected respectively by each input end of respective diode with described first multiplexer channel selector switch, the output terminal of this first multiplexer channel selector switch is connected with main processor modules by main comparator circuit, and this main processor modules is also connected with host liquid crystal module; The control end of described multiplexer channel selector switch is connected with the first control output end of main processor modules.
Further, described control module also comprises: main power taking unit, and the input end of this main power taking unit is connected with the output line of a passive flow quantity sensor, and the output terminal of this main power taking unit connects the feeder ear of described control module.
Further, the input end of described main power taking unit is connected with the output line of each passive flow quantity sensor by the second multiplexer channel selector switch; The described control end of the second multiplexer channel selector switch is connected with the second control output end of main processor modules; Described main processor modules is suitable for controlling the input signal of the highest signal of the second multiplexer channel selector switch selection frequency as main power taking unit according to the signal frequency of the acquisition of each passive flow quantity sensor.
The invention has the beneficial effects as follows: passive flow quantity sensor of the present invention and passive flow measurement display control program achieve flow sensor and normally work under passive condition, break away from the restriction that traditional Hall element relies on power supply, more or the field of interference etc. can be adapted at and carry out rate of flow of fluid, flow measurement without external power source and the loaded down with trivial details occasion of wiring, and have easy to use and reliable, structure simply, the advantage such as zero-power; And because passive flow quantity sensor is not originally in needing externally fed when, there is corresponding AC wave shape signal to export when wheel turns, not only itself be zero-power but also can the advantage such as supplying power for outside, and achieve real passive measurement, passive measurement and show on the spot or the display of a passive measurement distant place.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural drawing of passive flow quantity sensor of the present invention;
Fig. 2 is the output waveform figure of passive flow quantity sensor of the present invention;
Fig. 3 is the theory diagram of passive flow measurement display control program of the present invention.
In figure: impeller 1, coil T.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.
Passive flow quantity sensor of the present invention is that impeller is when rotating, induction ac voltage signal is produced by permeability magnetic material pickup coil, this signal and wheel speed are directly proportional, and because Inside coil etc. is all passive device, therefore there is not the possibility of active device infringement.
Embodiment 1
As shown in Figure 1, a kind of passive flow quantity sensor of the present invention, comprising: sensor body, and be provided with the impeller 1 being suitable for fluid driven and rotating in sensor body front end, wherein the blade of this impeller 1 is magnetic leaf; And described passive flow quantity sensor also comprises: be suitable for rotating with described impeller 1 coil that the magnetic field that produces is coupled, the output terminal of this coil is connected with the output line being positioned at sensor body.
Definition passive in the present invention is: the basis of this passive flow quantity sensor is in not needing externally fed, or in-line power, in power free situation, namely complete the detection of fluid flow, flow velocity.
The magnetic field that described vane rotary produces produces induced voltage by coil, and concrete induced voltage as shown in Figure 2.
About the output waveform figure of this passive flow quantity sensor, in Fig. 2, Uo+ and Uo-represents the output AC waveform of this passive flow quantity sensor respectively, the frequency of this AC wave shape and rate of flow of fluid, flow proportional.Therefore, the frequency of statistics AC wave shape can obtain corresponding flow velocity, the data on flows of detected fluid, realizes passive flow detection.
Wherein, coil, when impeller 1 rotates, produces corresponding coupled voltages by magnetic flux change, and this voltage becomes to exchange form and exports, by adding up the frequency of this alternating voltage to obtain measured flux data.
Preferably, showing on the spot to realize passive measurement, namely on described passive flow quantity sensor, showing the data such as fluid flow, flow velocity.Described passive flow quantity sensor also comprises: comparator circuit, and the input end of this comparator circuit is connected to the output terminal of coil, the output terminal connection handling device module of this comparator circuit, and this processor module is also connected with Liquid Crystal Module; And the output terminal of described coil also connects the input end of power taking unit, and this power taking unit is suitable for the power supply to described comparator circuit, processor module and Liquid Crystal Module.This passive flow quantity sensor becomes through power taking unit the power supply that DC voltage provides comparator circuit, processor module and Liquid Crystal Module by the AC signal gathering flow acquisition.Wherein, described power taking unit comprises: bridge rectifier circuit, filtering circuit and mu balanced circuit.
As the optional embodiment of the one of magnetic leaf in the present embodiment, above described blade, be pasted with magnetic sheet.
As the optional embodiment of the second of magnetic leaf in the present embodiment, described blade is provided with the draw-in groove being suitable for inserting magnetic stripe.
On the present embodiment basis, the output terminal of described coil is also connected with divider resistance, to realize carrying out pressure limiting to the output signal of this passive flow quantity sensor, to meet the signal input range of subsequent conditioning circuit.
Optionally, described blade quantity is 3-8 sheet.
Described impeller also can substitute with turbine.
Therefore, relative to the flow sensor of prior art, passive flow quantity sensor of the present invention, because sensor is originally in without any need for externally fed when, just there is when wheel turns corresponding flow waveform signal to export, not only itself be zero-power but also can the advantage such as supplying power for outside.
Embodiment 2
As shown in Figure 3, on embodiment 1 basis, present embodiments provide a kind of passive flow measurement display control program, comprise control module, described control module connects the passive flow quantity sensor described at least one; Described control module comprises: the first multiplexer channel selector switch, the output line of each passive flow quantity sensor is connected respectively by each input end of respective diode with described first multiplexer channel selector switch, the output terminal of this first multiplexer channel selector switch is connected with main processor modules by main comparator circuit, and this main processor modules is also connected with host liquid crystal module; The control end of described multiplexer channel selector switch is connected with the first control output end of main processor modules.
Further, described control module also comprises: main power taking unit, and the input end of this main power taking unit is connected with the output line of a passive flow quantity sensor, and the output terminal of this main power taking unit connects the feeder ear of described control module.
Further, in order to make control module obtain long-acting, stable magnitude of voltage, the input end of described main power taking unit is connected with the output line of each passive flow quantity sensor by the second multiplexer channel selector switch; The described control end of the second multiplexer channel selector switch is connected with the second control output end of main processor modules; Described main processor modules is suitable for controlling the input signal of the highest signal of the second multiplexer channel selector switch selection frequency as main power taking unit according to the signal frequency of the acquisition of each passive flow quantity sensor.
Wherein, the circuit structure of described main power taking unit is identical with the circuit structure of described power taking unit.
Optionally, described main processor modules and processor module are suitable for selecting low-power scm.
Further, described main processing block is also connected with some roads output terminal, can control external equipment (such as but not limited to water pump, solenoid valve etc.) to export corresponding control signal.
Described main processor modules is also connected with button group.
This passive flow measurement display control program and passive flow quantity sensor data are transmitted, and achieve the display of a passive measurement distant place.
Therefore, this passive flow measurement display control program has departed from the restriction of power supply, namely can realize fluid flow, flow rate detection without the need to external power supply.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on instructions, must determine its technical scope according to right.
Claims (8)
1. a passive flow quantity sensor, is characterized in that, comprising: sensor body, and be provided with the impeller being suitable for fluid driven and rotating in sensor body front end, wherein the blade of this impeller is magnetic leaf;
And described passive flow quantity sensor also comprises:
The coil that the magnetic field being suitable for producing with described vane rotary is coupled, the output terminal of this coil is connected with the output line being positioned at sensor body.
2. passive flow quantity sensor as claimed in claim 1, it is characterized in that, described passive flow quantity sensor also comprises: comparator circuit, the input end of this comparator circuit is connected to the output terminal of coil, the output terminal connection handling device module of this comparator circuit, this processor module is also connected with Liquid Crystal Module;
And the output terminal of described coil also connects the input end of power taking unit, and this power taking unit is suitable for the power supply to described comparator circuit, processor module and Liquid Crystal Module.
3. passive flow quantity sensor as claimed in claim 1, is characterized in that, be pasted with magnetic sheet above described blade.
4. passive flow quantity sensor as claimed in claim 1, is characterized in that, described blade is provided with the draw-in groove being suitable for inserting magnetic stripe.
5. the passive flow quantity sensor as described in any one of claim 1-4, is characterized in that, the output terminal of described coil is also connected with divider resistance.
6. a passive flow measurement display control program, is characterized in that, comprising: control module, and described control module connects at least one passive flow quantity sensor as claimed in claim 1;
Described control module comprises: the first multiplexer channel selector switch, the output line of each passive flow quantity sensor is connected respectively by each input end of respective diode with described first multiplexer channel selector switch, the output terminal of this first multiplexer channel selector switch is connected with main processor modules by main comparator circuit, and this main processor modules is also connected with host liquid crystal module;
The control end of described multiplexer channel selector switch is connected with the first control output end of main processor modules.
7. passive flow measurement display control program as claimed in claim 6, it is characterized in that, described control module also comprises: main power taking unit input end is connected with the output line of a passive flow quantity sensor, and the output terminal of this main power taking unit connects the feeder ear of described control module.
8. passive flow measurement display control program as claimed in claim 7, is characterized in that, the input end of described main power taking unit is connected with the output line of each passive flow quantity sensor by the second multiplexer channel selector switch;
The described control end of the second multiplexer channel selector switch is connected with the second control output end of main processor modules;
Described main processor modules is suitable for controlling the input signal of the highest signal of the second multiplexer channel selector switch selection frequency as main power taking unit according to the signal frequency of the acquisition of each passive flow quantity sensor.
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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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| 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107525548A (en) * | 2016-06-20 | 2017-12-29 | 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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|---|---|
| CN104964723B (en) | 2018-12-04 |
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