CN202815005U - Hot-bulb anemometer - Google Patents
Hot-bulb anemometer Download PDFInfo
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- CN202815005U CN202815005U CN201220494889.XU CN201220494889U CN202815005U CN 202815005 U CN202815005 U CN 202815005U CN 201220494889 U CN201220494889 U CN 201220494889U CN 202815005 U CN202815005 U CN 202815005U
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Abstract
The utility model relates to a hot-bulb anemometer. The hot-bulb anemometer comprises: a double coupling type thermocouple sensor; a temperature sensor for measuring the environment temperature at a wind speed detection point; a temperature compensation circuit for receiving the temperature value measured by the temperature sensor to perform temperature compensation on the signal of a double coupling type thermocouple, wherein the signal output end of the temperature compensation circuit is connected with a temperature signal amplifying circuit; a processor, wherein the processor comprises a first AD conversion circuit, a second AD conversion circuit and a wind speed calculator; and a display screen for receiving the wind speed value acquired by the wind speed calculator and displaying the wind speed value. The hot-bulb anemometer of the utility model can be used to realize the thermocouple sensor temperature compensation function, and eliminate the influences of the environment temperature on wind speed measurement to make the measurement result more accurate.
Description
Technical field
The utility model relates to a kind of measurement instrument, and specifically a kind of hot-bulb formula wind gage belongs to the fluid measurement technical field.
Background technology
Common measuring wind speed can adopt impeller or rotor Measuring Frequency Method, but these methods are fit to the larger situation of measuring wind, and for the less situation of wind speed, adopts impeller or rotor Measuring Frequency Method can not obtain accurately air speed value.Along with the development of technology and to the raising of test result accuracy requirement, measuring accuracy and function to the measuring wind speed instrument are all had higher requirement, a kind of hot-bulb formula air velocity transducer that utilizes the electric thermo-couple temperature sensitivity characteristic has also been proposed simultaneously, it is simple in structure, cheap and support the use with single-chip microcomputer, the measuring wind speed wide ranges, highly sensitive, fast response time.
Such as the existing disclosed a kind of Breeze anemometer of patent documentation CN86205994U, it comprises sensing probe, and signal processing apparatus, display device and casing, its sensing probe are as the flow velocity sensitive element by the thermocouple heap that comprises hot junction and cold junction.The outer end around be installed in the sleeve pipe with certain diameter with the resistance wire that connects constant current source in hot junction.Cold junction is packed in the endoporus of sleeve pipe.The output terminal connecting line of resistance wire and thermopile is drawn by the endoporus of sleeve pipe.With a constant current source resistive heater is heated.When airless passed through, hot junction and cold junction kept a fixed difference difference, produce certain electromotive force.When gas current flows through thermocouple with certain speed, will take away certain heat, the hot junction of thermopair and cold junction temperature are reduced.The electromotive force that is caused by the temperature difference also changes thereupon.The temperature difference of cold and hot end changes with the size of gas flow rate.Thermopile produces the non-linear electromotive force that is inversely proportional to gas flow rate.This electromotive force is sent into signal processing apparatus.Through amplifying and linearity correction, in display, demonstrate the flow velocity of gas at last.
Breeze anemometer in the such scheme, if the air speed value of guarantee measuring is accurately, the cold junction that needs to guarantee sensing probe can keep constant temperature, and the hot junction changes along with the variation of gas velocity.But in technique scheme, the cold junction of its sensing probe is the endoporus that is arranged at sleeve pipe, and the temperature of casing tube internal hole is bound to change along with the variation of ambient temperature, so the temperature of the cold junction of sensing probe is relevant with environment temperature.Just there is a problem in this: even identical air speed value, under the varying environment temperature, the result that the Breeze anemometer in the such scheme is measured also can be different.Therefore, the Breeze anemometer in the such scheme is inaccurate to the wind speed result who measures.
The utility model content
Technical problem to be solved in the utility model is that the measuring wind speed result that anemoscope of the prior art is surveyed is subjected to the impact of environment temperature not accurate enough, thereby a kind of hot-bulb formula wind gage with temperature-compensation circuit is provided.
For solving the problems of the technologies described above, the utility model provides a kind of hot-bulb formula wind gage, comprises
Two even thermocouple sensors, it comprises:
Two even thermopairs, cold junction is connected with earth signal, and the hot junction is connected with the thermocouple signal amplifying circuit;
Heating wire is spiral fashion, and it is outside to be sheathed on described two even thermopair;
Constant current source is connected with described heating wire, for described heating wire provides constant electric current;
Also comprise:
Temperature sensor, the environment temperature of measuring wind check point;
Temperature-compensation circuit receives the temperature value that described temperature sensor measurement arrives, and the signal of described two even thermopairs is carried out temperature compensation, and its signal output part is connected with the temperature signal amplifying circuit;
Processor comprises: the first A/D convertor circuit, the second A/D convertor circuit and course-and-speed computer;
Described the first A/D convertor circuit receives the simulating signal that described thermocouple signal amplifying circuit is exported, and is converted into digital signal;
Described the second A/D convertor circuit receives the simulating signal that described temperature signal amplifying circuit is exported, and is converted into digital signal;
Described course-and-speed computer receives the signal that described the first A/D convertor circuit and described the second A/D convertor circuit are exported, and obtains air speed value in conjunction with its built-in algorithm;
Display screen receives air speed value and demonstration that described course-and-speed computer obtains.
Described temperature sensor selects Germany to congratulate the temperature sensor of Li Shi film platinum resistor PT100A model.
The singlechip chip of described processor adopting MSP430F149 model.
The steady current of described constant current source is 40mA.
Described display screen is LCD display.
Also further comprise:
Keyboard, input control order is given described processor.
Also further comprise:
Communication unit is realized the data communication of described processor and subscriber terminal equipment, and measurement result is transferred to described ustomer premises access equipment.
Described communication unit adopts the communication chip of CP2102 model.
Technique scheme of the present utility model has the following advantages compared to existing technology:
(1) hot-bulb formula wind gage described in the utility model comprises temperature sensor and temperature-compensation circuit.Above-mentioned temperature-compensation circuit, receive the temperature value that described temperature sensor measurement arrives, signal to described two even thermopairs carries out temperature compensation, eliminated the harmful effect that environment temperature causes measuring wind speed, effectively avoided in the prior art because the inaccurate problem of measurement result that variation of ambient temperature causes.
(2) hot-bulb formula wind gage described in the utility model, temperature sensor selects Germany to congratulate the temperature sensor of Li Shi film platinum resistor PT100A model, this temperature sensor is dispatched from the factory by Heraeus company, can be used for ultralow temperature and measure (starting from-196 ° of C), low-temperature measurement (to+400 ° of C), middle temperature measurement (to+600 ° of C) and high temperature measurement (to+1000 ° of C).The starting material that this temperature sensor is selected have good chemical stability, and degree of purity and uniformity coefficient are subjected to humidity hardly, and the impact of weather or other environment has further guaranteed the accuracy of measurement result.And the temperature-compensation circuit that is used with it can be eliminated environment temperature to the impact of two even thermopairs, guarantees to record accurately result.
(3) hot-bulb formula wind gage described in the utility model, the singlechip chip of processor adopting MSP430F149 model, have low in energy consumption, clock system is flexible, antijamming capability is strong, inside has six tunnel 12 some row advantages such as AD conversion line, can guarantee that measuring wind speed result of the present utility model is more accurate.
(4) hot-bulb formula wind gage described in the utility model is selected two even thermocouple sensors, and two even thermocouple sensors are compared with single even thermocouple sensor has better stability and more energy-conservation.Two even thermocouple sensor just because of the application's selection, therefore can select the constant current source of 40mA, and two even thermopairs are under the constant current source effect of 40mA, the windless lower electric potential difference that just can produce 22mV, for the wind gage of hand-held, adopt hot-bulb formula wind gage of the present utility model effectively saves energy extend working time.
(5) hot-bulb formula wind gage described in the utility model, except comprising keyboard, outside the functions such as display screen, also comprise the communication unit that can communicate, the user can realize data communication with ustomer premises access equipment by this communication unit, timely measurement result is reached that ustomer premises access equipment is preserved or other processing.
Description of drawings
For content of the present utility model is more likely to be clearly understood, below in conjunction with accompanying drawing, the utility model is described in further detail, wherein,
Fig. 1 is the structural representation of hot-bulb formula wind gage described in the utility model;
Fig. 2 is the circuit of temperature-compensation circuit described in the utility model.
Embodiment
The structure of the described hot-bulb formula of present embodiment wind gage as shown in Figure 1, it comprises, two even thermocouple sensors, described two even thermocouple sensors comprise: two even thermopairs, cold junction is connected with earth signal, the hot junction is connected with the thermocouple signal amplifying circuit; Spiral helicine heating wire, it is outside to be sheathed on described two even thermopair; Constant current source is connected with described heating wire, for described heating wire provides constant electric current.Selecting the steady current of described constant current source in the present embodiment is 40mA.
In order to eliminate environment temperature to the impact of measurement result, the hot-bulb formula wind gage in the present embodiment also comprises temperature sensor, the environment temperature of measuring wind check point; Temperature-compensation circuit receives the temperature value that described temperature sensor measurement arrives, and the signal of described two even thermopairs is carried out temperature compensation, and its signal output part is connected with the temperature signal amplifying circuit; As preferred embodiment, described temperature sensor selects Germany to congratulate the temperature sensor of Li Shi film platinum resistor PT100A model, this temperature sensor is dispatched from the factory by Heraeus company, can be used for ultralow temperature and measure (starting from-196 ° of C), low-temperature measurement (to+400 ° of C), middle temperature measurement (to+600 ° of C) and high temperature measurement (to+1000 ° of C).The starting material that this temperature sensor is selected have good chemical stability, and degree of purity and uniformity coefficient are subjected to humidity hardly, and the impact of weather or other environment has further guaranteed the accuracy of measurement result.Fig. 2 has provided the temperature-compensation circuit in the present embodiment, also has the temperature-compensation circuit of other various ways in the prior art, is not giving unnecessary details in the present embodiment.
Also comprise processor, comprising: the first A/D convertor circuit, the second A/D convertor circuit and course-and-speed computer; Described the first A/D convertor circuit receives the simulating signal that described thermocouple signal amplifying circuit is exported, and is converted into digital signal; Described the second A/D convertor circuit receives the simulating signal that described temperature signal amplifying circuit is exported, and is converted into digital signal; Described course-and-speed computer receives the signal that described the first A/D convertor circuit and described the second A/D convertor circuit are exported, and obtains air speed value in conjunction with its built-in algorithm; Display screen receives air speed value and demonstration that described course-and-speed computer obtains.The singlechip chip of described processor adopting MSP430F149 model has low in energy consumptionly, and clock system is flexible, antijamming capability is strong, and inside has some row advantages such as six road AD conversion lines, can guarantee that measuring wind speed result of the present utility model is more accurate.And the built-in algorithm essence of described course-and-speed computer is exactly the analysis principle to thermopair, for example the method for disclosed measuring wind among the existing issued patents document CN101762718B.
Display screen receives air speed value and demonstration that described course-and-speed computer obtains, and as preferred embodiment, described display screen is LCD display.
Technique scheme has been eliminated the harmful effect that environment temperature causes measuring wind speed, has effectively avoided in the prior art because the inaccurate problem of measurement result that variation of ambient temperature causes.
For so that the function of the hot-bulb formula wind gage of present embodiment is abundanter, it also further comprises: keyboard, and input control order is given described processor; Communication unit is realized the data communication of described processor and subscriber terminal equipment, and measurement result is transferred to described ustomer premises access equipment.The user can realize data communication with ustomer premises access equipment by this communication unit, timely measurement result is reached that ustomer premises access equipment is preserved or other processing.Preferably, described communication unit adopts the communication chip of CP2102 model.
Obviously, above-described embodiment only is for example clearly is described, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And the apparent variation of being extended out thus or change still are among the protection domain of the present utility model.
Claims (8)
1. a hot-bulb formula wind gage comprises
Two even thermocouple sensors, it comprises:
Two even thermopairs, cold junction is connected with earth signal, and the hot junction is connected with the thermocouple signal amplifying circuit;
Heating wire is spiral fashion, and it is outside to be sheathed on described two even thermopair;
Constant current source is connected with described heating wire, for described heating wire provides constant electric current;
It is characterized in that, also comprise:
Temperature sensor, the environment temperature of measuring wind check point;
Temperature-compensation circuit receives the temperature value that described temperature sensor measurement arrives, and the signal of described two even thermopairs is carried out temperature compensation, and its signal output part is connected with the temperature signal amplifying circuit;
Processor comprises: the first A/D convertor circuit, the second A/D convertor circuit and course-and-speed computer;
Described the first A/D convertor circuit receives the simulating signal that described thermocouple signal amplifying circuit is exported, and is converted into digital signal;
Described the second A/D convertor circuit receives the simulating signal that described temperature signal amplifying circuit is exported, and is converted into digital signal;
Described course-and-speed computer receives the signal that described the first A/D convertor circuit and described the second A/D convertor circuit are exported, and obtains air speed value in conjunction with its built-in algorithm;
Display screen receives air speed value and demonstration that described course-and-speed computer obtains.
2. hot-bulb formula wind gage according to claim 1 is characterized in that:
Described temperature sensor selects Germany to congratulate the temperature sensor of Li Shi film platinum resistor PT100A model.
3. hot-bulb formula wind gage according to claim 2 is characterized in that:
The singlechip chip of described processor adopting MSP430F149 model.
4. hot-bulb formula wind gage according to claim 3 is characterized in that:
The steady current of described constant current source is 40mA.
5. arbitrary described hot-bulb formula wind gage according to claim 1-4 is characterized in that:
Described display screen is LCD display.
6. hot-bulb formula wind gage according to claim 5 is characterized in that:
Also further comprise:
Keyboard, input control order is given described processor.
7. hot-bulb formula wind gage according to claim 6 is characterized in that:
Also further comprise:
Communication unit is realized the data communication of described processor and subscriber terminal equipment, and measurement result is transferred to described ustomer premises access equipment.
8. hot-bulb formula wind gage according to claim 7 is characterized in that:
Described communication unit adopts the communication chip of CP2102 model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220494889.XU CN202815005U (en) | 2012-09-26 | 2012-09-26 | Hot-bulb anemometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220494889.XU CN202815005U (en) | 2012-09-26 | 2012-09-26 | Hot-bulb anemometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202815005U true CN202815005U (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220494889.XU Expired - Fee Related CN202815005U (en) | 2012-09-26 | 2012-09-26 | Hot-bulb anemometer |
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| Country | Link |
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| CN (1) | CN202815005U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018875A (en) * | 2016-07-22 | 2016-10-12 | 无锡信大气象传感网科技有限公司 | Atmospheric environment wind speed monitoring system |
| CN110531106A (en) * | 2019-08-26 | 2019-12-03 | 北京卫星环境工程研究所 | Wind velocity measurement system and wind measurement method under low temperature, hypobaric |
-
2012
- 2012-09-26 CN CN201220494889.XU patent/CN202815005U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018875A (en) * | 2016-07-22 | 2016-10-12 | 无锡信大气象传感网科技有限公司 | Atmospheric environment wind speed monitoring system |
| CN110531106A (en) * | 2019-08-26 | 2019-12-03 | 北京卫星环境工程研究所 | Wind velocity measurement system and wind measurement method under low temperature, hypobaric |
| CN110531106B (en) * | 2019-08-26 | 2021-07-27 | 北京卫星环境工程研究所 | Method for measuring wind speed in low-temperature and low-pressure environment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20210926 |