CN203084572U - Microcontroller-based refrigerating machine control circuit - Google Patents
Microcontroller-based refrigerating machine control circuit Download PDFInfo
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- CN203084572U CN203084572U CN 201220726025 CN201220726025U CN203084572U CN 203084572 U CN203084572 U CN 203084572U CN 201220726025 CN201220726025 CN 201220726025 CN 201220726025 U CN201220726025 U CN 201220726025U CN 203084572 U CN203084572 U CN 203084572U
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- refrigeration machine
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Abstract
The utility model discloses a microcontroller-based refrigerating machine control circuit which comprises a microcontroller module, a temperature measuring circuit module, a motor driving module and a power source module. One end of the temperature measuring circuit module is connected with the microcontroller module and the other end of the temperature measuring circuit module is connected with a temperature measuring diode which is built in a detector; one end of the motor driving module is connected with the microcontroller module and the other end of the motor driving module is connected with a three-phase motor in a refrigerating machine; and the power source module provides voltage needed by the microcontroller module, the temperature measuring circuit module and the motor driving module. A modular design is adopted in the refrigerating machine control circuit so that the control circuit is isolated from a system and noise is effectively suppressed. A digital element is selected and a digital control mode makes the circuit high in control precision and stability. The control circuit adopts a single chip microcomputer as a microcontroller, communicates with an upper computer through a serial port, can receive an order and a feedback state in real time and can be easily used in engineering.
Description
Technical field
The utility model relates to the automatic control technology field, particularly relates to a kind of refrigeration machine control circuit based on microcontroller.
Background technology
Infrared eye is the core devices of infrared imaging system, and by the difference of focal plane working temperature, infrared eye can be divided into two kinds of refrigeration mode and non-refrigeration types.The refrigeration mode detector operation needs the cooperation of refrigeration machine.RM2-7i/XD-2 type sterlin refrigerator is the adaptive refrigeration machine of a kind of detector commonly used, compares with the refrigeration machine of other models, and this refrigeration machine has smaller volume and lower power consumption, but needs external control panel.
RM2-7i/XD-2 type sterlin refrigerator is based on the detector integrated refrigerating assembly of second generation Dewar technology, this type refrigeration machine adopts the integral structure of the miniature closed cycle of Stirling, it comprises a pressure wave maker and finger type freezer unit, refers to that the type freezer unit links together with the crankcase in the integral structure.Displacer in the finger type freezer unit is made heat exchanging agent, and compressor is by the three-phase direct-current brushless motor-driven of a rotation.The principle of work of refrigeration machine is a three phase electric machine drive compression machine, carries out energy exchange, and the thermometric diode on the detector focal plane can feed back different voltage with variation of temperature.Therefore to the control of refrigeration machine, be exactly feedback signal, three phase electric machine is controlled according to the thermometric diode.
Current refrigeration machine control panel adopts analog control mode more, and the circuit more complicated of mimic control panel is introduced noise easily, is unfavorable for the engineering application.
The utility model content
The technical problems to be solved in the utility model provides a kind of refrigeration machine control circuit based on microcontroller, in order to solve the above-mentioned problem that exists in the prior art.
For solving the problems of the technologies described above, the utility model provides a kind of refrigeration machine control circuit based on microcontroller, comprising: micro controller module, temperature measurement circuit module, motor drive module and power module; Wherein, an end of described temperature measurement circuit module is connected with described micro controller module, and the built-in thermometric diode of the other end of temperature measurement circuit module and detector is connected; One end of described motor drive module is connected with micro controller module, and the three phase electric machine in the other end of motor drive module and the refrigeration machine is connected; Described power module is respectively described micro controller module, temperature measurement circuit module and motor drive module required voltage is provided.
Further, described micro controller module comprises:
Single-chip microcomputer C8051F061 and voltage reference source LT1790-2.5, wherein, 2.5 volts of reference voltages of LT1790-2.5 output are done the reference of AD sampling to C8051F061.
Further, the AIN0 of C8051F061 is connected with the AD DTA of temperature measurement circuit module; The VREF0 of C8051F061, VREF1 and VREF2 are connected with the Vout of LT1790-2.5; The P0.0 of C8051F061, P0.1 are connected with TX, the RX of host computer serial ports; The P0.2 of C8051F061, P0.3, P0.4 are connected with IN1, IN2, the IN3 of motor drive module.
Further, described temperature measurement circuit module comprises:
Constant current source 3CR3A, common mode inductance RN102 and operational amplifier A D8061; Wherein, 1 pin of 3CR3A connects the Vo of RN102; The Vin of RN102, Gi are connected with DTA, the DTK of thermometric diode; Through 3 pin of the connection of the DTAL signal after RN102 filtering AD8061, export to micro controller module through the AD_DTA signal after the AD8061.
Further, described motor drive module comprises:
Three phase electric machine chip for driving L6234, wherein the OUT1 of L6234, OUT2, OUT3 are connected with three phase electric machine M_LA_E7, M_LB_E1, the M_LC_E8 of detector refrigeration machine.
Further, described power module comprises:
Power supply chip LTM8021 and power supply chip LT3085; Wherein, 30 volts of power source conversion that LTM8021 will import are 5 volts of power supplys, offer LT3085; LT3085 is 3.3 volts of power supplys with 5 volts of power source conversion, offers the microcontroller module.
The utility model beneficial effect is as follows:
The utility model adopts modular design, makes control circuit and system keep isolation, has suppressed noise effectively; Select the digital element device for use,, make circuit have high control precision and stability by digital control approach; Adopt single-chip microcomputer to make microcontroller,, can receive instruction and feedback states in real time, be convenient to engineering and use by serial ports and upper machine communication.
Description of drawings
Fig. 1 is the structural representation of a kind of refrigeration machine control circuit based on microcontroller among the utility model embodiment;
Fig. 2 is the circuit diagram of micro controller module among the utility model embodiment;
Fig. 3 is the circuit diagram of temperature measurement module among the utility model embodiment;
Fig. 4 is the circuit diagram of motor drive module among the utility model embodiment;
Fig. 5 is the circuit diagram of power module among the utility model embodiment;
Fig. 6 is the internal work schematic diagram of microcontroller of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, does not limit the utility model.
As shown in Figure 1, the utility model embodiment relates to a kind of refrigeration machine control circuit based on microcontroller, comprising: micro controller module, temperature measurement circuit module, motor drive module and power module; One end of temperature measurement circuit module is connected with micro controller module, and the built-in thermometric diode of the other end of temperature measurement circuit module and detector is connected; One end of motor drive module is connected with micro controller module, and the three phase electric machine in the other end of motor drive module and the refrigeration machine is connected; Power module is respectively micro controller module, temperature measurement circuit module and motor drive module required voltage is provided.
The temperature signal of the thermometric diode feedback that the temperature measurement circuit module is built-in with detector is converted to voltage signal; As shown in Figure 6, micro controller module is gathered this voltage signal, and calculates, and output pwm signal is given motor drive module then; Motor drive module is converted to power signal with pwm signal, exports to the three phase electric machine in the refrigeration machine.
As shown in Figure 2, micro controller module comprises single-chip microcomputer C8051F061, voltage reference source LT1790-2.5, resistance and electric capacity, wherein, C8051F061 finishes the calculating of controlled variable, the generation of three phase electric machine drive signal and the reception and the execution of serial port command as microcontroller, and 2.5 volts of reference voltages of LT1790-2.5 output are done the reference of AD sampling to C8051F061.The AIN0 of C8051F061 is connected with the AD_DTA of temperature measurement circuit module, is used for the collecting temperature signal.The VREF0 of C8051F061, VREF1 and VREF2 are connected with the Vout of LT1790-2.5, for the AD of C8051F061 inside provides reference voltage.The P0.0 of C8051F061, P0.1 are connected with TX, the RX of host computer serial ports, are used to receive the instruction of host computer serial ports, and feedback correlation behavior data.The P0.2 of C8051F061, P0.3, P0.4 are connected with IN1, IN2, the IN3 of motor drive module, with the pwm signal that calculates, export to motor drive module, are used to control rotating speed of motor to reach the stable of temperature.
As shown in Figure 3, the temperature measurement circuit module comprises constant current source 3CR3A, common mode inductance RN102, operational amplifier A D8061, resistance and electric capacity.1 pin of 3CR3A connects the Vo of RN102, is used to the built-in thermometric diode power supply of detector; The Vin of RN102, Gi are connected with DTA, the DTK of thermometric diode, are used to receive temperature signal; Through 3 pin of the connection of the DTAL signal after RN102 filtering AD8061, export to micro controller module through the AD_DTA signal after the AD8061, AD8061 improves the driving force of circuit.
As shown in Figure 4, motor drive module comprises three phase electric machine chip for driving L6234, resistance and electric capacity.The OUT1 of L6234, OUT2, OUT3 are connected with three phase electric machine M_LA_E7, M_LB_E1, the M_LC_E8 of detector refrigeration machine, and the control signal of micro controller module output is carried out exporting to after the power transfer three phase electric machine in the refrigeration machine.
As shown in Figure 5, power module comprises power supply chip LTM8021, power supply chip LT3085, resistance and electric capacity.30 volts of power source conversion that LTM8021 will import are 5 volts of power supplys, offer LT3085; LT3085 is 3.3 volts of power supplys with 5 volts of power source conversion, offers the microcontroller module.
As can be seen from the above-described embodiment, the utility model adopts modular design, makes control circuit and system keep isolation, has suppressed noise effectively; Select the digital element device for use,, make circuit have high control precision and stability by digital control approach; Adopt single-chip microcomputer to make microcontroller,, can receive instruction and feedback states in real time, be convenient to engineering and use by serial ports and upper machine communication.
Although be the example purpose, preferred embodiment of the present utility model is disclosed, it also is possible those skilled in the art will recognize various improvement, increase and replacement, therefore, scope of the present utility model should be not limited to the foregoing description.
Claims (6)
1. the refrigeration machine control circuit based on microcontroller is characterized in that, comprising: micro controller module, temperature measurement circuit module, motor drive module and power module; Wherein, an end of described temperature measurement circuit module is connected with described micro controller module, and the built-in thermometric diode of the other end of temperature measurement circuit module and detector is connected; One end of described motor drive module is connected with micro controller module, and the three phase electric machine in the other end of motor drive module and the refrigeration machine is connected; Described power module is respectively described micro controller module, temperature measurement circuit module and motor drive module required voltage is provided.
2. the refrigeration machine control circuit based on microcontroller as claimed in claim 1 is characterized in that described micro controller module comprises:
Single-chip microcomputer C8051F061 and voltage reference source LT1790-2.5, wherein, 2.5 volts of reference voltages of LT1790-2.5 output are done the reference of AD sampling to C8051F061.
3. the refrigeration machine control circuit based on microcontroller as claimed in claim 2 is characterized in that the AIN0 of C8051F061 is connected with the AD_DTA of temperature measurement circuit module; The VREF0 of C8051F061, VREF1 and VREF2 are connected with the Vout of LT1790-2.5; The P0.0 of C8051F061, P0.1 are connected with TX, the RX of host computer serial ports; The P0.2 of C8051F061, P0.3, P0.4 are connected with IN1, IN2, the IN3 of motor drive module.
4. as each described refrigeration machine control circuit of claim 1 ~ 3, it is characterized in that described temperature measurement circuit module comprises based on microcontroller:
Constant current source 3CR3A, common mode inductance RN102 and operational amplifier A D8061; Wherein, 1 pin of 3CR3A connects the Vo of RN102; The Vin of RN102, Gi are connected with DTA, the DTK of thermometric diode; Through 3 pin of the connection of the DTAL signal after RN102 filtering AD8061, export to micro controller module through the AD_DTA signal after the AD8061.
5. the refrigeration machine control circuit based on microcontroller as claimed in claim 4 is characterized in that described motor drive module comprises:
Three phase electric machine chip for driving L6234, wherein the OUT1 of L6234, OUT2, OUT3 are connected with three phase electric machine M_LA_E7, M_LB_E1, the M_LC_E8 of detector refrigeration machine.
6. as claim 1,2,3 or 5 described refrigeration machine control circuits, it is characterized in that described power module comprises based on microcontroller:
Power supply chip LTM8021 and power supply chip LT3085; Wherein, 30 volts of power source conversion that LTM8021 will import are 5 volts of power supplys, offer LT3085; LT3085 is 3.3 volts of power supplys with 5 volts of power source conversion, offers the microcontroller module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220726025 CN203084572U (en) | 2012-12-25 | 2012-12-25 | Microcontroller-based refrigerating machine control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220726025 CN203084572U (en) | 2012-12-25 | 2012-12-25 | Microcontroller-based refrigerating machine control circuit |
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| CN203084572U true CN203084572U (en) | 2013-07-24 |
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| CN 201220726025 Expired - Lifetime CN203084572U (en) | 2012-12-25 | 2012-12-25 | Microcontroller-based refrigerating machine control circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103064449A (en) * | 2012-12-25 | 2013-04-24 | 中国电子科技集团公司第十一研究所 | Refrigerating machine control circuit based on microcontroller |
| CN106472363A (en) * | 2016-10-12 | 2017-03-08 | 四川森迪科技发展股份有限公司 | A kind of temperature control system of the chicken son's couveuse based on ripple suppression circuit |
-
2012
- 2012-12-25 CN CN 201220726025 patent/CN203084572U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103064449A (en) * | 2012-12-25 | 2013-04-24 | 中国电子科技集团公司第十一研究所 | Refrigerating machine control circuit based on microcontroller |
| CN103064449B (en) * | 2012-12-25 | 2016-04-27 | 中国电子科技集团公司第十一研究所 | A kind of refrigeration machine control circuit based on microcontroller |
| CN106472363A (en) * | 2016-10-12 | 2017-03-08 | 四川森迪科技发展股份有限公司 | A kind of temperature control system of the chicken son's couveuse based on ripple suppression circuit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130724 |