CN208937731U - Thermostatic control module and microwave scintiloscope - Google Patents
Thermostatic control module and microwave scintiloscope Download PDFInfo
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- CN208937731U CN208937731U CN201821450498.1U CN201821450498U CN208937731U CN 208937731 U CN208937731 U CN 208937731U CN 201821450498 U CN201821450498 U CN 201821450498U CN 208937731 U CN208937731 U CN 208937731U
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Abstract
The utility model discloses a kind of microwave scintiloscopes, including antenna-reflected metal cap, thermostatic control module and heat transfer connector, thermostatic control module is by controller, PWM duty cycle impulse generator, heating circuit and adding thermal resistance are sequentially connected with composition, temperature sense probe is mounted on antenna-reflected metal cap internal temperature acquisition data and is transmitted to controller, controller calculates temperature sense probe returned data and is converted into the output signal of controller using PID technology, and it is exported by the PWM waveform that PWM duty cycle impulse generator is translated into corresponding duty ratio, adding thermal resistance is heated by heating circuit, and antenna-reflected metal cap is transferred heat to by heat transfer connector.The utility model circuit and control structure design are simple, heat conduction efficiency arrives, achieve the purpose that provide while economizing on resources and save cost it is a kind of itself can be made to be in stable temperature environment under work and provide the microwave scintiloscope of reliable analysis data for scientific research.
Description
Technical field
The utility model belongs to surface flux observation field, and in particular to a kind of thermostatic control module and is equipped with the constant temperature
The microwave scintiloscope of control module.
Background technique
Momentum between surface flux, i.e. earth's surface and atmosphere, sensible heat and latent heat flux exchange, and this exchange occurs in near-earth
It is that characterization underlying surface forces and its an important parameter with its atmospheric interaction, measurement parameter can be applied near face
There is weight in the fields such as agricultural, meteorology, the hydrology, weather forecast, energy balance for water resources management, the hydrology, meteorology, agricultural etc.
Want meaning.Therefore, it is always meteorology that the surface flux under natural conditions on Large-scale areas, which how is relatively accurately calculated,
One of with the research contents of hydrologist.
Mostly surface flux is acquired using microwave scintiloscope at present.Microwave scintiloscope includes transmitter and receiving instrument,
Transmitter emits the electromagnetic wave of certain wave band, propagates in an atmosphere.Receiving instrument is received by temperature on Electromagnetic Wave Propagation path, wet
The electromagnetic wave signal of degree and air pressure influence of fluctuations, and indicated with refraction coefficient structural parameters (Cn2).Pass through birefringence coefficient construction
The surface fluxs data such as sensible heat flux and latent heat flux are calculated for meteorological and hydrologic research in parameter (Cn2).
When receiving electromagnetic wave signal, receiving instrument is influenced by self-temperature variation, and measurement accuracy and stability is caused to decline.
Utility model content
(1) technical problems to be solved
It is asked to solve the instrument that receives of existing microwave scintiloscope because own temperature variation causes measurement accuracy and stability to decline
Topic, the utility model provide a kind of microwave scintiloscope for installing the temperature control module using PID (ratio, integral, differential) technology additional.
(2) technical solution
In order to achieve the above object, the utility model provides a kind of thermostatic control module, including (pulse is wide by controller, PWM
Degree modulation) duty cycle pulse generator, heating circuit, adding thermal resistance and temperature sense probe, the controller, PWM duty cycle
Impulse generator, heating circuit and adding thermal resistance are sequentially connected with, and temperature sense probe is connect with the controller communication, temperature sense
The temperature collection that should pop one's head in data are transmitted to controller, and controller counts temperature sense probe returned data using PID technology
The output signal for calculating and being converted into controller calculates the formula of use are as follows:
Wherein, ev (t)=sp (t)-pv (t) ... ... ... ... ... ... ... ... ... (2)
In formula: ev (t) is the difference of preset temperature value and temperature sense probe temperature collection, sp (t) is preset temperature
Value, pv (t) are temperature sense probe temperature collection；Mv (t) is the output signal of controller；KPFor proportionality coefficient, TIAnd TDRespectively
It is the time of integration and derivative time, M is the initial value of integral part；
The output signal of controller is exported by the PWM waveform that PWM duty cycle impulse generator forms corresponding duty ratio,
Adding thermal resistance is heated by heating circuit.
Further, adding thermal resistance exterior insulation material is refractory ceramics.
Further, heating circuit include current-limiting resistance, pull-up resistor, high-speed switch metal-oxide-semiconductor, system power supply power supply just
Pole, Large-power High-Speed metal-oxide-semiconductor, adding thermal resistance, pull down resistor and system power supply power supply cathode,
The grid of high-speed switch metal-oxide-semiconductor is connected respectively at the first end of current-limiting resistance with the first end of pull down resistor；
The grid phase with the first end of pull-up resistor and Large-power High-Speed metal-oxide-semiconductor respectively that drains of high-speed switch metal-oxide-semiconductor
Even；
The source electrode of high-speed switch metal-oxide-semiconductor is connected with adding thermal resistance；
The second end of current-limiting resistance is connected with the first end of PWM duty cycle impulse generator, and PWM duty cycle pulse occurs
The second end of device is connected with controller；
The second end of pull down resistor is connected with system power supply power supply cathode；
The second end of pull-up resistor is connected with system power supply power supply anode；
The drain electrode of Large-power High-Speed metal-oxide-semiconductor is connected with system power supply power supply anode；
The source electrode of Large-power High-Speed metal-oxide-semiconductor is connected with adding thermal resistance.
The utility model provides a kind of microwave scintiloscope, including antenna-reflected metal cap, thermostatic control module, antenna-reflected
Metal cap is connect with thermostatic control module by heat transfer connector, and the temperature sense probe of thermostatic control module is mounted on antenna
Inside reflective metals cover；
Heat transfer connector is spherical arc shape, is made of high-heat conductive efficency metal, and antenna-reflected metal cap and heat pass
It leads and fills heat-conducting silicone grease between connector inside gap to increase conduction efficiency；
Surfacing contacts between thermostatic control module and heat transfer connector, and filling heat-conducting silicone grease is to increase inside gap
Conduction efficiency；
Further, fine polishing treatment, the anti-aging heat preservation in spherical surface outlet end are carried out inside antenna-reflected metal cap
Heat barrier foam sealing.
(3) beneficial effect
The utility model circuit and control structure design are simple, the heat between thermostatic control module and antenna-reflected metal cap
Conduction efficiency is high, a kind of can make itself to be in stable temperature achieving the purpose that provide while economizing on resources and save cost
It works under environment and provides the microwave scintiloscope of reliable analysis data for scientific research.
Detailed description of the invention
Fig. 1 is the schematic diagram of the microwave scintiloscope of the utility model.
Fig. 2 is the schematic diagram of the thermostatic control module of the utility model.
Fig. 3 is the closed-loop control system functional block diagram of the utility model.
[description of symbols]
1, antenna-reflected metal cap；2, heat transfer connector；3, thermostatic control module；4, anti-aging thermal insulation foam；
301, controller；302, PWM duty cycle impulse generator；303, current-limiting resistance；304, pull down resistor；305, pull-up resistor；
306, system power supply power supply cathode；307, system power supply power supply anode；308, Large-power High-Speed metal-oxide-semiconductor；309, adding thermal resistance；
310, temperature sense probe；311, high-speed switch metal-oxide-semiconductor.
Specific embodiment
It is with reference to the accompanying drawing, right by specific embodiment in order to understand in order to preferably explain the utility model
The utility model is described in detail.
A kind of microwave scintiloscope of the utility model as shown in Figure 1 includes antenna-reflected metal cap 1,2 and of heat transfer connector
Thermostatic control module 3, antenna-reflected metal cap 1 and thermostatic control module 3 are connected by heat transfer connector 2, heat transfer connection
Part 2 is made of high-heat conductive efficency metal, is spherical arc shape, gap between antenna-reflected metal cap 1 and heat transfer connector 2
Inside filling heat-conducting silicone grease can make heat radiation point more uniform to increase conduction efficiency, improve thermostatic control module 3 to antenna
The temperature-controlled precision of reflective metals cover 1.Surfacing contacts between heat transfer connector 2 and thermostatic control module 3, in the two gap
Heat-conducting silicone grease is filled in portion, increases heat conduction efficiency.Antenna-reflected cover 1 and anti-aging thermal insulation foam 4 are sealing structure, mesh
So that the inner and outer boundary of cavity is reduced heat exchange.
Thermostatic control module 3 includes controller 301, PWM duty cycle impulse generator 302, heating circuit, adding thermal resistance
309 and temperature sense probe 310, controller 301, PWM duty cycle impulse generator 302, heating circuit, adding thermal resistance 309 it is suitable
Secondary connection.Temperature sense probe 310 is mounted on its internal temperature of 1 internal measurement of antenna-reflected metal cap, and will measure temperature value
It passes in controller 301.301 internal PID algorithm of controller, calculates the formula of use are as follows:
Wherein, ev (t)=sp (t)-pv (t) ... ... ... ... ... ... ... ... ... (2)
In formula: ev (t) is the difference of preset temperature value and temperature sense probe temperature collection, sp (t) is setting value, pv
It (t) is process variable；Mv (t) is the output signal of controller；KPFor proportionality coefficient, TIAnd TDIt is the time of integration and differential respectively
Time, M are the initial values of integral part；
Heating circuit as shown in Figure 2 has included the current-limiting resistance 303 of the size effect of branch current where limitation；It rises and improves
The pull down resistor 304 and pull-up resistor 305 of the anti-interference ability effect of module；System power supply power supply cathode 306 and system power supply
Positive pole 307；Large-power High-Speed metal-oxide-semiconductor 308 and high-speed switch metal-oxide-semiconductor 311 as Switching Power Supply.
The grid of high-speed switch metal-oxide-semiconductor 311 is respectively at the first end of current-limiting resistance 303 and the first end of pull down resistor 304
It is connected；The grid with the first end of pull-up resistor 305 and Large-power High-Speed metal-oxide-semiconductor 308 respectively that drain of high-speed switch metal-oxide-semiconductor 311
Extremely it is connected；The source electrode of high-speed switch metal-oxide-semiconductor 311 is connected with adding thermal resistance 309；The second end and PWM duty of current-limiting resistance 303
First end than impulse generator 302 is connected, and the second end of PWM duty cycle impulse generator 302 is connected with controller；Drop-down electricity
The second end of resistance 304 is connected with system power supply power supply cathode 306；Second end and the system power supply power supply anode of pull-up resistor 305
307 are connected；The drain electrode of Large-power High-Speed metal-oxide-semiconductor 308 is connected with system power supply power supply anode 307；Large-power High-Speed metal-oxide-semiconductor 308
Source electrode be connected with adding thermal resistance 309.
When utility model works as shown in Figure 3, need to choose preset temperature value i.e. according to the measurement of microwave scintiloscope
Sp (t), preset temperature are target value, and by preset temperature input controller 301, controller 301 converts preset temperature
For controller output signal and be transferred to PWM duty cycle pulse generator 302, PWM duty cycle impulse generator 302 by its
The PWM waveform for being converted into corresponding duty ratio is output to heating circuit, and the control through heating circuit makes generation of adding thermal resistance 309 etc.
The thermal power of ratio, and conduct through heat transfer connector 2 to antenna-reflected metal cap 1, then pass through temperature sense probe 310
True temperature, that is, pv (t) inside obtained antenna-reflected metal cap 1 is measured, and passes controller 301 back, controller 301 passes through
Deviation, that is, the ev (t) for calculating the true temperature and preset temperature inside antenna-reflected metal cap 1, calculates to obtain controller
Output signal, then PWM duty cycle needed for issuing next secondary control as PWM duty cycle impulse generator 302, to adjust heating
Temperature, repeating the above process makes 1 internal temperature of antenna-reflected metal cap persistently keep preset temperature value.Whole work process shape
At a PID closed-loop control system suitable for varying temperature environment, circumstance of temperature difference can be calculated and carry out system call interception, it can be quickly steady
Determine the temperature compensation situation of system.
The utility model temperature control loop section realizes that actual antennas is reflected under thermostatic control using PID closed-loop control theory
Temperature dynamic change is less than ± 0.3 DEG C in metal cap 1, provides metastable internal environment scheme for the instrument of flux measurement,
Change the status influenced by ambient temperature such as traditional devices and signal, so that microwave scintiloscope is worked under stable temperature environment for
Scientific research provides reliable analysis data.
The utility model circuit and control structure design simplify, while greatly improving heat conduction efficiency, reach and economize on resources
Save the purpose of cost.
It is to be appreciated that the description to specific embodiment of the utility model progress is simply to illustrate that this is practical above
Novel technology path and feature, its object is to allow those skilled in the art that can understand the content of the utility model simultaneously
Implement accordingly, but the utility model is not limited to above-mentioned particular implementation.All ranges in the utility model claims
The various change or modification inside made should all cover within the protection scope of the present utility model.
Claims (5)
1. a kind of thermostatic control module, which is characterized in that including controller (301), PWM duty cycle impulse generator (302), hair
Heater circuit, adding thermal resistance (309) and temperature sense probe (310), the controller (301), PWM duty cycle impulse generator
(302), heating circuit and adding thermal resistance (309) are sequentially connected with, the temperature sense probe (310) and the controller (301)
Communication connection, temperature sense probe (310) the temperature collection data are transmitted to controller (301), and controller uses PID technology
The output signal of controller is calculated temperature sense probe returned data and is converted into, it is described to calculate the formula used are as follows:
Wherein, ev (t)=sp (t)-pv (t) ... ... ... ... ... ... ... ... ... (2)
In formula: ev (t) is the difference of preset temperature value and temperature sense probe temperature collection, sp (t) is preset temperature value, pv
It (t) is temperature sense probe temperature collection；Mv (t) is the output signal of controller；KPFor proportionality coefficient, TIAnd TDIt is long-pending respectively
Between timesharing and derivative time, M are the initial values of integral part；
The output signal of the controller (301) forms the PWM of corresponding duty ratio by PWM duty cycle impulse generator (302)
Waveform output, heats adding thermal resistance (309) by heating circuit.
2. thermostatic control module (3) as described in claim 1, which is characterized in that adding thermal resistance (309) the exterior insulation material
For refractory ceramics.
3. thermostatic control module as described in claim 1, which is characterized in that the heating circuit include current-limiting resistance (303), on
Pull-up resistor (305), high-speed switch metal-oxide-semiconductor (311), system power supply power supply positive (307), add Large-power High-Speed metal-oxide-semiconductor (308)
Thermal resistance (309), pull down resistor (304) and system power supply power supply cathode (306), the grid of the high-speed switch metal-oxide-semiconductor (311)
Pole is connected respectively at the first end of current-limiting resistance (303) with the first end of pull down resistor (304)；
The drain electrode of the high-speed switch metal-oxide-semiconductor (311) respectively with the first end and Large-power High-Speed metal-oxide-semiconductor of pull-up resistor (305)
(308) grid is connected；
The source electrode of the high-speed switch metal-oxide-semiconductor (311) is connected with adding thermal resistance (309)；
The second end of the current-limiting resistance (303) is connected with the first end of PWM duty cycle impulse generator (302), PWM duty cycle
The second end of impulse generator (302) is connected with controller；
The second end of the pull down resistor (304) is connected with system power supply power supply cathode (306)；
The second end of the pull-up resistor (305) is connected with system power supply power supply positive (307)；
The drain electrode of the Large-power High-Speed metal-oxide-semiconductor (308) is connected with system power supply power supply positive (307)；
The source electrode of the Large-power High-Speed metal-oxide-semiconductor (308) is connected with adding thermal resistance (309).
4. a kind of microwave scintiloscope, including antenna-reflected metal cap (1), which is characterized in that further include heat transfer connector and power
Benefit requires thermostatic control module (3) described in any one of 1-3, the antenna-reflected metal cap (1) and thermostatic control module (3)
It is connected by heat transfer connector (2), the temperature sense probe (310) of the thermostatic control module (3) is mounted on antenna-reflected
Metal cap (1) is internal；
The heat transfer connector (2) is spherical arc shape, is made of high-heat conductive efficency metal, antenna-reflected metal cap (1)
Heat-conducting silicone grease is filled inside gap between heat transfer connector (2) to increase conduction efficiency；
Surfacing contacts between thermostatic control module (3) and heat transfer connector (2), and filling heat-conducting silicone grease is to increase inside gap
Add conduction efficiency.
5. microwave scintiloscope as claimed in claim 4, which is characterized in that carried out inside the antenna-reflected metal cap (1) high-precision
Fine polishing light processing, spherical surface outlet end are sealed with anti-aging thermal insulation foam (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821450498.1U CN208937731U (en) | 2018-09-05 | 2018-09-05 | Thermostatic control module and microwave scintiloscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821450498.1U CN208937731U (en) | 2018-09-05 | 2018-09-05 | Thermostatic control module and microwave scintiloscope |
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| Publication Number | Publication Date |
|---|---|
| CN208937731U true CN208937731U (en) | 2019-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821450498.1U Active CN208937731U (en) | 2018-09-05 | 2018-09-05 | Thermostatic control module and microwave scintiloscope |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109164508A (en) * | 2018-09-05 | 2019-01-08 | 北京雨根科技有限公司 | Thermostatic control module and microwave scintiloscope |
-
2018
- 2018-09-05 CN CN201821450498.1U patent/CN208937731U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109164508A (en) * | 2018-09-05 | 2019-01-08 | 北京雨根科技有限公司 | Thermostatic control module and microwave scintiloscope |
| CN109164508B (en) * | 2018-09-05 | 2024-03-01 | 北京雨根科技有限公司 | Constant temperature control module and microwave scintillator |
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