CN104808014A - Platinum resistor based air flow rate sensor - Google Patents
Platinum resistor based air flow rate sensor Download PDFInfo
- Publication number
- CN104808014A CN104808014A CN201510217913.3A CN201510217913A CN104808014A CN 104808014 A CN104808014 A CN 104808014A CN 201510217913 A CN201510217913 A CN 201510217913A CN 104808014 A CN104808014 A CN 104808014A
- Authority
- CN
- China
- Prior art keywords
- platinum resistance
- air flow
- flow rate
- rate sensor
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses a platinum resistor based air flow rate sensor comprising a platinum resistor. A microcontroller module and a current detection module and a display module connected with the microcontroller module are arranged on the platinum resistor. The platinum resistor based air flow rate sensor is low in cost, convenient to use and high in measurement precision; the fall current sensor is adopted to detect current of the platinum resistor in real time and calculates temperature difference between surrounding ambient temperature and own temperature of the platinum resistor, and further air flow rate is acquired accurately.
Description
Technical field
The present invention relates to a kind of air velocity pick-up unit, particularly relate to a kind of air flow rate sensor based on platinum resistance, belong to wind speed measurement control field.
Background technology
Wind speed measurement the numerous areas such as environmental protection meteorology, commercial unit, mining safety, health care all tool be of great significance.Along with the development of China's wind-power electricity generation cause, the progress of detection technique and people are to the raising of environmental requirement, people to the measuring accuracy of detecting instrument and the requirement of function more and more higher.Air velocity transducer is the sensor for measuring speed air flow.Air velocity transducer can be used as the air flow sensor of the Boiler pressure control sensor and automobile and so on of air-conditioning system.In addition, it also causes the concern of people as the indispensable sensor of wind tunnel experiment in fluid mechanics and aerodynamic scope.
At numerous areas such as environmental protection meteorology, household electrical appliance, commercial unit, health cares, air velocity is all an important detected parameters, and particularly at society, the household electrical appliance such as various fan, air-conditioning enter family, office and public place in a large number.Based on above reason, the present invention devises a kind of wind speed measuring circuit of measuring wind, and it has, and cost is low, easy to use, measuring accuracy comparatively high, and can with other integrated chips such as single-chip microcomputer with the use of and become the application circuit of other system.
Such as application number is a kind of wind speed measuring sensor of " 201210492818.0 ", comprise the base that hollow is arranged, the cover plate being arranged on described base top and the vane cover be sleeved on described base, described chassis interior is provided with the transmission shaft be fixedly connected with the geometric center position of described vane cover, described chassis interior is provided with head bearing for supporting described transmission shaft and lower bearing, the locating sleeve be sleeved on described transmission shaft is provided with between described head bearing and lower bearing, the bottom outer wall of described transmission shaft is provided with magnet piece, the inwall of described base is provided with magnetic sensor, described magnetic sensor and described magnet piece are positioned on same level line, the two ends of described vane cover are symmetrically arranged with two vanes.This invention structure is simple, reasonable in design, and processing and fabricating is convenient, and use simple operation, highly sensitive, realize cost low, long service life, practical, result of use is good, be convenient to promote the use of, but measuring technique needs to be further improved.
And for example application number is the hot grating wind speed wind direction sensor of platinum of " 201310108380.6 ", comprise platinum filament, heat insulation basalis, transition bed, coating layer and sheet metal lead-in wire, wherein heat insulation basalis connection bonding with transition bed, platinum filament is coiled into four independently grid silk structure a, b, c, d is also bonded on transition bed, four two grid silk structure a independently in grid silk structure, b is horizontal, two other grid silk structure c, d vertically arranges, and grid silk structure a, the line of b and grid silk structure c, the line of d is orthogonal, platinum filament lead-in wire goes between with sheet metal and is welded to connect, coating layer is bonded on transition bed, this invention sensor is used for the measurement of wind speed and direction, there is volume little, quality is light, precision is high, long-life, feature simple and reliable for structure.But measuring accuracy needs to be improved further.
Summary of the invention
Technical matters to be solved by this invention provides for the deficiency of background technology the air flow rate sensor based on platinum resistance that a kind of cost is low, easy to use, measuring accuracy is higher.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
Based on an air flow rate sensor for platinum resistance, comprise platinum resistance, the current detection module, the display module that described platinum resistance are provided with micro controller module and are connected with micro-control module;
Wherein, current detection module, for detecting the electric current that platinum resistance circulates in real time;
Platinum resistance, for detecting platinum resistance ambient temperature and platinum resistance own temperature in real time;
Micro controller module, the electric current circulated in the own temperature according to the platinum resistance detected, platinum resistance and platinum resistance ambient temperature calculate air velocity, are specifically calculated as follows:
Wherein, V is air velocity, I
hfor the electric current that resistance circulates, R
hfor the resistance of platinum resistance, T
hfor platinum resistance own temperature, T
jfor platinum resistance ambient temperature, C is convection transfer rate, A be platinum resistance to flow area;
Display module, for showing the air velocity that micro-control module calculates in real time.
As the further preferred version of a kind of air flow rate sensor based on platinum resistance of the present invention, described micro controller module adopts AVR series monolithic.
As the further preferred version of a kind of air flow rate sensor based on platinum resistance of the present invention, described display module is LCD display.
As the further preferred version of a kind of air flow rate sensor based on platinum resistance of the present invention, the model of described platinum resistance is Ptl00.
As the further preferred version of a kind of air flow rate sensor based on platinum resistance of the present invention, described current detection module adopts Hall current sensor.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
1, cost of the present invention is low, easy to use and measuring accuracy is higher;
2, the present invention detects the electric current of platinum resistance in real time by adopting Hall current sensor and calculates the temperature difference of platinum resistance ambient temperature and own temperature, and then obtains air velocity accurately.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
As shown in Figure 1, a kind of air flow rate sensor based on platinum resistance, comprises platinum resistance, the current detection module, the display module that described platinum resistance are provided with micro controller module and are connected with micro-control module;
Wherein, current detection module, for detecting the electric current that platinum resistance circulates in real time;
Platinum resistance, for detecting platinum resistance ambient temperature and platinum resistance own temperature in real time;
Micro controller module, the electric current circulated in the own temperature according to the platinum resistance detected, platinum resistance and platinum resistance ambient temperature calculate air velocity, are specifically calculated as follows:
Wherein, V is air velocity, I
hfor the electric current that resistance circulates, R
hfor the resistance of platinum resistance, T
hfor platinum resistance own temperature, T
jfor platinum resistance ambient temperature, C is convection transfer rate, A be platinum resistance to flow area;
Display module, for showing the air velocity that micro-control module calculates in real time.
Wherein, described micro controller module adopts AVR series monolithic, and described display module is LCD display, and the model of described platinum resistance is Ptl00, and described current detection module adopts Hall current sensor.
Wind speed measurement the numerous areas such as environmental protection meteorology, commercial unit, mining safety, health care all tool be of great significance.Along with the development of China's wind-power electricity generation cause, the progress of detection technique and people are to the raising of environmental requirement, people to the measuring accuracy of detecting instrument and the requirement of function more and more higher.Air velocity transducer is the sensor for measuring speed air flow.Air velocity transducer can be used as the air flow sensor of the Boiler pressure control sensor and automobile and so on of air-conditioning system.In addition, it also causes the concern of people as the indispensable sensor of wind tunnel experiment in fluid mechanics and aerodynamic scope.
At numerous areas such as environmental protection meteorology, household electrical appliance, commercial unit, health cares, air velocity is all an important detected parameters, and particularly at society, the household electrical appliance such as various fan, air-conditioning enter family, office and public place in a large number.Based on above reason, the present invention devises a kind of wind speed measuring circuit of measuring wind, and it has, and cost is low, easy to use, measuring accuracy comparatively high, and can with other integrated chips such as single-chip microcomputer with the use of and become the application circuit of other system.
Fluid is placed in by the object heated, thermal loss mainly heat radiation and the thermal convection of this object when one.Lower in temperature, in the negligible situation of heat loss through radiation, the heat of object transmits mainly thermal convection.When the speed of fluid increases, the thermal loss of object also increases.If to electrically to platinum resistance thermometer sensor, heating, so platinum resistance thermometer sensor, will reach one by the determined equilibrium temperature of rate of flow of fluid.
We adopt platinum resistance thermometer sensor, as heating target.Change due to temperature causes the change of the resistance of platinum resistance thermometer sensor, own, thus can be set up the mathematical model of fluid velocity and bridge circuit output voltage by bridge circuit.Utilize this principle to carry out the measurement of wind speed.
AVR single chip has prefetched instruction function, namely when an execution instruction, in advance next instruction is got into, and call instruction can be performed within a clock period; Multiple accumulator type, data processing speed is fast; AVR single chip has 32 general purpose working registers, and being equivalent to has 32 viaducts, can fast passing; Response time is fast.AVR single chip has multiple fixing interrupt vector entry address, can respond interruption fast; AVR single chip power consumption is low.For typical power consumption situation, be 100nA when WDT closes, be more suitable for battery powered application apparatus; The minimum 1.8V of some devices gets final product work; AVR single chip security performance is good.
Micro controller module of the present invention, the electric current circulated in the own temperature according to the platinum resistance detected, platinum resistance and platinum resistance ambient temperature calculate air velocity, are specifically calculated as follows:
as can be seen from formula, when platinum resistance ambient temperature and own temperature do not exist temperature difference, can show that 1/4 power of electric current and wind speed is directly proportional when thermal resistance temperature and environment temperature one timing easily.
Those skilled in the art of the present technique are understandable that, unless otherwise defined, all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the present invention.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.By reference to the accompanying drawings embodiments of the present invention are explained in detail above, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, makes a variety of changes under can also or else departing from the prerequisite of present inventive concept.
Claims (5)
1. based on an air flow rate sensor for platinum resistance, it is characterized in that: comprise platinum resistance, the current detection module, the display module that described platinum resistance are provided with micro controller module and are connected with micro-control module;
Wherein, current detection module, for detecting the electric current that platinum resistance circulates in real time;
Platinum resistance, for detecting platinum resistance ambient temperature and platinum resistance own temperature in real time;
Micro controller module, the electric current circulated in the own temperature according to the platinum resistance detected, platinum resistance and platinum resistance ambient temperature calculate air velocity, are specifically calculated as follows:
Wherein, V is air velocity, I
hfor the electric current that resistance circulates, R
hfor the resistance of platinum resistance, T
hfor platinum resistance own temperature, T
jfor platinum resistance ambient temperature, C is convection transfer rate, A be platinum resistance to flow area;
Display module, for showing the air velocity that micro-control module calculates in real time.
2. according to claim 1 based on the air flow rate sensor of platinum resistance, it is characterized in that: described micro controller module adopts AVR series monolithic.
3. according to claim 1 based on the air flow rate sensor of platinum resistance, it is characterized in that: described display module is LCD display.
4. according to claim 1 based on the air flow rate sensor of platinum resistance, it is characterized in that: the model of described platinum resistance is Ptl00.
5. according to claim 1 based on the air flow rate sensor of platinum resistance, it is characterized in that: described current detection module adopts Hall current sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510217913.3A CN104808014A (en) | 2015-04-30 | 2015-04-30 | Platinum resistor based air flow rate sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510217913.3A CN104808014A (en) | 2015-04-30 | 2015-04-30 | Platinum resistor based air flow rate sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104808014A true CN104808014A (en) | 2015-07-29 |
Family
ID=53693019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510217913.3A Pending CN104808014A (en) | 2015-04-30 | 2015-04-30 | Platinum resistor based air flow rate sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104808014A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018874A (en) * | 2016-07-22 | 2016-10-12 | 无锡信大气象传感网科技有限公司 | Environmental wind speed monitoring system based on filter circuit and power supply controller |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87106770A (en) * | 1986-10-08 | 1988-04-20 | 株式会社日立制作所 | Heat resistance wire type of air flowmeter |
| US5205170A (en) * | 1991-04-01 | 1993-04-27 | Ford Motor Company | Mass flow sensor |
| US5629482A (en) * | 1994-04-28 | 1997-05-13 | Semiconductor Energy Laboratory Co., Ltd. | Measuring device utilizing a thermo-electromotive element |
| CN1210981A (en) * | 1997-09-11 | 1999-03-17 | 株式会社日立制作所 | Thermal resistor type air flow measuring apparatus |
| CN101769936A (en) * | 2009-01-07 | 2010-07-07 | 中国科学院电子学研究所 | Minisize wind speed sensor integrating traction theory with hot wire theory |
| CN103217550A (en) * | 2013-03-29 | 2013-07-24 | 北京遥测技术研究所 | Platinum grating type wind speed and wind direction sensor |
-
2015
- 2015-04-30 CN CN201510217913.3A patent/CN104808014A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87106770A (en) * | 1986-10-08 | 1988-04-20 | 株式会社日立制作所 | Heat resistance wire type of air flowmeter |
| US5205170A (en) * | 1991-04-01 | 1993-04-27 | Ford Motor Company | Mass flow sensor |
| US5629482A (en) * | 1994-04-28 | 1997-05-13 | Semiconductor Energy Laboratory Co., Ltd. | Measuring device utilizing a thermo-electromotive element |
| CN1210981A (en) * | 1997-09-11 | 1999-03-17 | 株式会社日立制作所 | Thermal resistor type air flow measuring apparatus |
| CN101769936A (en) * | 2009-01-07 | 2010-07-07 | 中国科学院电子学研究所 | Minisize wind speed sensor integrating traction theory with hot wire theory |
| CN103217550A (en) * | 2013-03-29 | 2013-07-24 | 北京遥测技术研究所 | Platinum grating type wind speed and wind direction sensor |
Non-Patent Citations (3)
| Title |
|---|
| 孙锴: "基于恒温差的热膜风速计设计", 《中国优秀硕士学位论文全文数据库信息科技辑》 * |
| 林定选: "采用MEMS技术研制硅气体流速传感器", 《中国优秀硕士学位论文全文数据库信息科技辑》 * |
| 马志敏 等: "热阻式流速仪的设计", 《传感器技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018874A (en) * | 2016-07-22 | 2016-10-12 | 无锡信大气象传感网科技有限公司 | Environmental wind speed monitoring system based on filter circuit and power supply controller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104295517A (en) | Intelligent indoor temperature adjusting system | |
| CN104535792B (en) | High-sensitive hot wind speed sensor structure and wind speed and wind direction measuring method | |
| CN205210109U (en) | Novel wind speed tester | |
| CN205690454U (en) | A kind of detection device of pot partially and electromagnetic oven | |
| CN106018875A (en) | Atmospheric environment wind speed monitoring system | |
| TW201422118A (en) | Control circuit for fan | |
| CN104820110A (en) | Wind velocity monitoring system based on wireless sensor network | |
| CN104808014A (en) | Platinum resistor based air flow rate sensor | |
| CN104931723A (en) | Wind speed monitoring early warning system based on platinum resistor | |
| CN106018874A (en) | Environmental wind speed monitoring system based on filter circuit and power supply controller | |
| CN109669124A (en) | A kind of test device under motor and linear mould group high-temperature work environment | |
| CA2822146C (en) | Air heater systems and control methods | |
| CN209656860U (en) | A kind of test device under motor and linear mould group high-temperature work environment | |
| CN204903728U (en) | Take load motor testing arrangement among broad width temperature environment | |
| RU130395U1 (en) | HEAT METER HOUSEHOLD "HEAT METER-2" | |
| CN104833818A (en) | Wind speed monitoring system having optimized power supplying | |
| CN212844151U (en) | Novel standard pressure calibration table | |
| CN102890518B (en) | Method and system for analyzing accelerometer temperature control system | |
| CN202501930U (en) | Winding type thermometer used in transformer | |
| CN211785914U (en) | MOSFET internal resistance detection circuit | |
| CN107783566A (en) | Low-power operation method for flow sensor | |
| Glatzl et al. | Characterization and optimization of a thermal flow sensor on circuit board level | |
| CN102999040B (en) | A kind of parametric controller and using method thereof of power electronic equipment power cell Operation at full power being carried out to Thermal test | |
| CN113091940A (en) | Heating and temperature measuring integrated wind speed and direction sensor | |
| CN106253587A (en) | A kind of new forms of energy passenger car magneto temperature high-precision measurement circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150729 |
|
| RJ01 | Rejection of invention patent application after publication |