CN105867457A - Intelligent temperature control system based on A/D conversion circuit - Google Patents
Intelligent temperature control system based on A/D conversion circuit Download PDFInfo
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- CN105867457A CN105867457A CN201610228516.0A CN201610228516A CN105867457A CN 105867457 A CN105867457 A CN 105867457A CN 201610228516 A CN201610228516 A CN 201610228516A CN 105867457 A CN105867457 A CN 105867457A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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Abstract
The invention discloses an intelligent temperature control system based on an A/D conversion circuit. The intelligent temperature control system comprises a single-chip microcomputer, a buzzer, a data memory, a power supply, a heater, a display screen, the A/D conversion circuit and a signal filtering and amplifying circuit, wherein the buzzer, the data memory, the power supply, the heater, the display screen, the A/D conversion circuit and the signal filtering and amplifying circuit are connected with the single-chip microcomputer. The intelligent temperature control system further comprises a vibration sensor which is connected with the input end of the A/D conversion circuit, and a temperature sensor which is connected with the input end of the signal filtering and amplifying circuit. The output end of the A/D conversion circuit is connected with the single-chip microcomputer. The output end of the signal filtering and amplifying circuit is connected with the single-chip microcomputer. According to the intelligent temperature control system, pot body vibration frequency information which is acquired by the vibration sensor and in-pot soup temperature information that is detected by the temperature sensor are analyzed through the single-chip microcomputer. The intelligent temperature control system can effectively and automatically adjust heating temperature of the heater so that the temperature of the heater is constant, thereby keeping the temperature of the soup in the pot to a certain temperature and furthermore effectively saving electric power resource.
Description
Technical field
The present invention relates to electronic applications, specifically, be a kind of temperature intelligence based on A/D change-over circuit
Can control system.
Background technology
Chafing dish is a kind of catering mode deeply liked by numerous citizen, but in use, if people not with
Time note regulating the firepower size of chafing dish, then the soup of boiling will be splashed out and scalded the hand of people in chafing dish,
And easily evaporate under the long condition of high temperature of soup in pot so that people need when having dinner to be constantly in
Watch out for state.And tradition chafing dish all manually goes to regulate firepower switch size by people, this mode is not only
Inconvenient operation, and the temperature of soup in cannot effectively controlling pot.Therefore, people are the most thoroughly allowed to exist
Without manually going to regulate its firepower size to control boiling degree and the temperature of soup in pot, just when using chafing dish
Be people be eager solve problem.
Summary of the invention
It is an object of the invention to overcome chafing dish of the prior art can not realize being automatically adjusted firepower size control
The defect of the temperature of soup in pot processed, it is provided that a kind of based on A/D change-over circuit Temperature Intelligent Control System.
The present invention is achieved through the following technical solutions: a kind of temperature intelligent based on A/D change-over circuit controls
System, including single-chip microcomputer, the buzzer being all connected with single-chip microcomputer, data storage, power supply, heating element,
Display screen, A/D change-over circuit and signal filtering amplifying circuit, be connected with the input of A/D change-over circuit
Vibrating sensor, and the temperature sensor being connected with the input of signal filtering amplifying circuit；Described
The output of A/D change-over circuit is connected with single-chip microcomputer；The output of described signal filtering amplifying circuit and list
Sheet machine is connected.
Described A/D change-over circuit is by conversion chip U, amplifier P4, and triode VT2, negative pole is through resistance
After R19 the TG pin with conversion chip U be connected, positive pole sequentially after resistance R20 and resistance R21 with
The TG pin phase of polar capacitor C7, the P pole that the VSS pin of conversion chip U is connected and conversion chip U
The VSS of the diode D6 that connection, N pole are connected with the positive pole of polar capacitor C7, positive pole and conversion chip U
The polar capacitor that pin is connected, negative pole is connected with the OUT pin of conversion chip U after resistance R22
C8, N pole is connected with the emitter stage of triode VT2, P pole after resistance R23 with conversion chip U's
The diode D8 that OUT pin is connected, positive pole is connected with the output of amplifier P4, negative pole sequentially warp
The polar capacitor C10 being connected with the P pole of diode D8 after resistance R27 and resistance R26, negative pole and two
The polarity electricity that the P pole of pole pipe D8 is connected, positive pole positive pole with amplifier P4 after resistance R24 is connected
Hold C9, and P pole VDD pin with conversion chip U after resistance R28 is connected, N pole sequentially warp
The diode D7 composition being connected with the positive pole of amplifier P4 after resistance R29 and resistance R25；Described polarity
The negative pole of electric capacity C7 is as A/D change-over circuit input；The GND pin ground connection of described conversion chip U,
Its OSC pin is connected with the P pole of diode D7；The grounded collector of described triode VT2, its base
Pole is connected with the negative pole of polar capacitor C8；The minus earth of described amplifier P4, its output is as A/D
The output of change-over circuit.
Described signal filtering amplifying circuit includes the signal acquisition circuit that input is connected with temperature sensor,
The double rank filter amplification circuit being connected with the output of signal acquisition circuit with output；Described pair of rank filtering
The output of amplifying circuit is connected with single-chip microcomputer.
Described signal acquisition circuit by amplifier P1, positive pole after resistance R1 with the positive pole phase of amplifier P1
Connect, negative pole as the polar capacitor C1 of the input of signal acquisition circuit, negative pole is after adjustable resistance R3
Be connected with the output of amplifier P1, pole that positive pole negative pole with amplifier P1 after resistance R2 is connected
Property electric capacity C2, N pole is connected with the output of amplifier P1, P pole after resistance R4 with amplifier P1
The diode D1 that is connected of positive pole, and one end is connected with the positive pole of amplifier P1, the other end with put
The resistance R5 composition that the output of big device P1 is connected；The output of described amplifier P1 is as signals collecting
The output of circuit.
The described pair of rank filter amplification circuit by amplifier P2, amplifier P2, triode VT1, N pole with put
The diode that the positive pole of big device P2 is connected, P pole output with amplifier P1 after resistance R6 is connected
D2, positive pole P pole with diode D2 after resistance R10 is connected, the polar capacitor C4 of minus earth,
Negative pole output with amplifier P2 after resistance R11 is connected, positive pole is sequentially through resistance R8 and resistance R7
The polar capacitor C3 being connected with the P pole of diode D2 afterwards, negative pole is connected with the negative pole of amplifier P2,
Polar capacitor C5, the P pole that positive pole output with amplifier P2 after resistance R12 is connected is through resistance R13
The diode D4 that negative pole with amplifier P2 is connected afterwards, N pole is connected with the output of amplifier P2,
Negative pole positive pole with amplifier P3 after resistance R16 is connected, positive pole is connected with the output of amplifier P2
Polar capacitor C6, the P pole connect negative pole with polar capacitor C6 after resistance R14 is connected, N pole is through electricity
The diode D3 being connected with the tie point of resistance R8 with resistance R7 after resistance R9, one end and polar capacitor C6
The resistance R15 that negative pole is connected, the other end is connected with the base stage of triode VT1, and P pole with put
The output of big device P3 is connected, N pole sequentially after resistance R18 and resistance R17 with triode VT1's
The diode D5 composition that emitter stage is connected；The minus earth of described amplifier P2；Described triode VT1
Grounded collector, the minus earth of described amplifier P3, its output is as double rank filter amplification circuit
Output.
For guaranteeing the practical effect of the present invention, described temperature sensor is DS18B20 temperature sensor；
Described vibrating sensor is TR355B vibrating sensor；Described display screen is the liquid having and touching regulatory function
Crystal display screen；Described conversion chip U is the integrated chip of KD-5608.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) single-chip microcomputer of the present invention can control to sending out according to the vibration frequency of the pot of vibrating sensor collection
The size of current of hot device output, the effective heating-up temperature controlling heating element；Meanwhile, single-chip microcomputer also can basis
In the pot of temperature sensor detection, the temperature of soup is controlled with the temperature value comparison result of storage in data storage
The heating-up temperature of heating element processed, effectively makes the soup in pot can keep certain temperature for a long time, thus really
Protect this temperature control system automatically controlling the temperature of heating element.
(2) signal of telecommunication that vibrating sensor exports can be filtered by the A/D change-over circuit of the present invention, eliminates
Interference signal in the signal of telecommunication, is converted to data-signal by the signal of telecommunication after anti-interference process simultaneously, and should
Data-signal after conversion amplifies output after again filtering, and ensures that the vibration that single-chip microcomputer receives passes
The accuracy of the information that sensor gathers.
(3) signal of telecommunication that temperature sensor can be exported by the signal filtering amplifying circuit of the present invention disturbs signal
The elimination carried out or suppression, meanwhile, the signal of telecommunication after anti-interference process also can be filtered and put by this circuit again
It is transferred to single-chip microcomputer after great, thus effectively raises the accuracy of the temperature information of temperature sensor detection.
(4) vibration frequency of pot is entered by the TR355B vibrating sensor that present invention employs stable performance
Row gathers, and have employed high-precision DS18B20 temperature sensor simultaneously and detects soup in pot,
Single-chip microcomputer controls the heating-up temperature of heating element according to different information, thus effectively ensure that the control of this temperature
The accuracy that system processed controls.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of the signal filtering amplifying circuit of the present invention.
Fig. 3 is the electrical block diagram of the A/D change-over circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing thereof, the present invention is described in further detail, but the enforcement of the present invention
Mode is not limited to this.
As it is shown in figure 1, the present invention includes single-chip microcomputer, the buzzer, the data that are all connected with single-chip microcomputer store
Device, heating element, power supply, display screen, A/D change-over circuit and signal filtering amplifying circuit, change with A/D
The vibrating sensor that the input of circuit is connected, and be connected with the input of signal filtering amplifying circuit
Temperature sensor.Wherein, described signal filtering amplifying circuit is as in figure 2 it is shown, it includes signals collecting electricity
Road and double rank filter amplification circuit.
For guaranteeing the reliability service of the present invention, described single-chip microcomputer preferentially have employed FM8PE59A single-chip microcomputer.
The INT pin of this FM8PE59A single-chip microcomputer is connected with data storage, and TI pin is connected with buzzer,
CKI pin is connected with display screen, and POUT pin is connected with heating element, and VIN pin is connected with power supply.
Described power supply is 12V DC voltage, and this voltage is that single-chip microcomputer is powered.
When the present invention runs, described vibrating sensor the most preferentially uses stable performance, monitoring range wide
TR355 vibrating sensor realizes.This vibrating sensor is fixedly installed on the bottom of pot, and it is used for gathering pot
The vibration frequency of body, and be converted to the frequency information of collection transmit through A/D change-over circuit after the signal of telecommunication, should
The signal of telecommunication that vibrating sensor exports is filtered by A/D change-over circuit, eliminates the interference signal in the signal of telecommunication,
The signal of telecommunication after anti-interference process is converted to data-signal simultaneously, and the data-signal after this conversion is carried out
It is transferred to single-chip microcomputer after again amplifying after filtering.Described data storage the most preferentially have employed stable performance
VNXe320A data storage, the data storage internal memory being somebody's turn to do contains vibration frequency value, and these data are deposited simultaneously
The temperature value that reservoir is the most capable of setting storage.The signal of telecommunication that the vibrating sensor of reception transmits is converted to by single-chip microcomputer
Data value, the data value after conversion is entered with the vibration frequency value of storage in data storage by single-chip microcomputer the most simultaneously
Row comparison, single-chip microcomputer exports corresponding electric current according to the result of comparison and controls heating element heating, in making pot
Soup keeps certain boiling degree, effectively prevents because the soup in pot occurs that violent boiling spills, i.e.
Be effectively prevented soup spill scald hurt people.Meanwhile, the vibration of pot is collected at vibrating sensor
During the vibration frequency that frequency stores in reaching data storage, single-chip microcomputer is controlling to the electric current of heating element output
When making soup in pot keep certain boiling degree, and export electric current and send soft to buzzer, buzzer
Chimes of doom, this chimes of doom for point out people's soup to reach certain boiling, i.e. prompting people note with
The distance of pot, to prevent from being burned.
Meanwhile, the described display screen present invention the most preferentially have employed has the LCDs touching regulatory function,
When soup in people need pot is maintained at certain temperature, people can touch adjusting key by this display screen
Temperature needed for setting, after this temperature value is then transmitted by single-chip microcomputer, data storage is arrived in storage.Described temperature
Degree sensor is fixedly installed the bottom of a pan first, this temperature sensor then temperature of soup, this temperature in detecting pot
The temperature information of detection is also converted to the signal of telecommunication through the transmission of signal filtering amplifying circuit, this signal by degree sensor
Filter amplification circuit can be same by the elimination disturbing signal to carry out in the signal of telecommunication of temperature sensor output or suppression
Time, this circuit also can be transferred to single-chip microcomputer after the signal of telecommunication after anti-interference process is again filtered and amplified, have
The accuracy that improve the signal of telecommunication that single-chip microcomputer receives of effect.The signal of telecommunication conversion that single-chip microcomputer then will receive
Compare, when temperature sensor detection for data value and with the set temperature value of storage in data storage
When soup temperature is less than the temperature value set, single-chip microcomputer output HIGH current, to heating element, makes heating element quickly add
Heat, in order to make soup reach set temperature, the temperature in soup reach set stable time, single-chip microcomputer is then
Exporting corresponding low current makes the stable holding of soup constant.Otherwise, soup detected at temperature sensor
When temperature is higher than design temperature, single-chip microcomputer receives and then stops output electric current after this information to heating element, now
Heating element stops heating, detects that the temperature of soup drops to less than design temperature uniform temperature at temperature sensor
Time after, single-chip microcomputer receive this information after output LOW current to heating element, make heating element heating soup to setting
Temperature, and make soup temperature keep constant, thus the present invention effectively achieves the temperature of soup in pot
Automatically control.The temperature sensor of the present invention the most preferentially have employed high-precision DS18B20 temperature sensor
Realize.
Present invention achieves automatically controlling of the firepower size to chafing dish, and to the temperature of the soup in pot
Automatically control, effectively saved electric power resource simultaneously.
As in figure 2 it is shown, described signal filtering amplifying circuit includes signal acquisition circuit and double rank filter and amplification electricity
Road；Described signal acquisition circuit is by amplifier P1, resistance R1, resistance R2, adjustable resistance R3, resistance
R4, resistance R5, polar capacitor C1, polar capacitor C2, and diode D1 form.
During connection, the positive pole of polar capacitor C1 positive pole with amplifier P1 after resistance R1 is connected, negative
Pole as the input of signal acquisition circuit and is connected with temperature sensor.
Wherein, the negative pole of polar capacitor C2 output with amplifier P1 after adjustable resistance R3 be connected,
Positive pole negative pole with amplifier P1 after resistance R2 is connected.The N pole of diode D1 is with amplifier P1's
Output is connected, P pole positive pole with amplifier P1 after resistance R4 is connected.One end of resistance R5 with
The positive pole of amplifier P1 is connected, the other end is connected with the output of amplifier P1.Described amplifier P1
Output as the output of signal acquisition circuit and be connected with double rank filter amplification circuit.
Further, the described pair of rank filter amplification circuit by amplifier P2, amplifier P2, triode VT1,
Resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, resistance
R13, resistance R14, resistance R15, resistance R16, resistance R17, resistance R18, polar capacitor C3, pole
Property electric capacity C4, polar capacitor C5, polar capacitor C6, diode D2, diode D3, diode D4,
And diode D5 composition.
During connection, the N pole of diode D2 is connected with the positive pole of amplifier P2, P pole is after resistance R6
It is connected with the output of amplifier P1.The positive pole of polar capacitor C4 after resistance R10 with diode D2
P pole be connected, minus earth.The negative pole of polar capacitor C3 defeated with amplifier P2 after resistance R11
Go out that end is connected, positive pole is sequentially connected through resistance R8 P pole with diode D2 after resistance R7.Pole
The property negative pole of electric capacity C5 is connected with the negative pole of amplifier P2, positive pole after resistance R12 with amplifier P2
Output be connected.
Wherein, the P pole of diode D4 negative pole with amplifier P2 after resistance R13 be connected, N pole
It is connected with the output of amplifier P2.The negative pole of polar capacitor C6 after resistance R16 with amplifier P3
Positive pole be connected, positive pole is connected with the output of amplifier P2.The P pole of diode D3 is through resistance R14
Afterwards the negative pole with polar capacitor C6 be connected, N pole after resistance R9 with the connection of resistance R8 Yu resistance R7
Point is connected.One end of resistance R15 is connected with the negative pole of polar capacitor C6, the other end and triode VT1
Base stage be connected.
Meanwhile, the P pole of diode D5 is connected with the output of amplifier P3, N pole is sequentially through resistance
After R18 and resistance R17, the emitter stage with triode VT1 is connected.The minus earth of described amplifier P2；
The grounded collector of described triode VT1, the minus earth of described amplifier P3, its output is as double rank
The output of filter amplification circuit is also connected with the IOA2 pin of FM8PE59A single-chip microcomputer.
During operation, the signal of telecommunication of temperature sensor output signal acquisition circuit in signal filtering amplifying circuit
Polar capacitor C1 be filtered process, the signal of telecommunication after process by amplifier P1 and diode D1 with
And polar capacitor C2 formed signal impedance process after and amplify after transmission, amplifier P2 and amplifier P3 with
And double rank filter amplification circuit that polar capacitor C3 and triode VT1 etc. are formed is by the telecommunications after impedance process
Export after number carrying out twice filter and amplification, thus effectively ensure that the standard of the signal of telecommunication that temperature sensor exports
Really property.
As it is shown on figure 3, described A/D change-over circuit is by conversion chip U, amplifier P4, triode VT2,
Resistance R19, resistance R20, resistance R21, resistance R22, resistance R23, resistance R24, resistance R25,
Resistance R26, resistance R27, resistance R28, resistance R29, polar capacitor C7, polar capacitor C8, polarity
Electric capacity C9, polar capacitor C10, diode D6, diode D7, and diode D8 form.
During connection, the negative pole of polar capacitor C7 TG pin with conversion chip U after resistance R19 is connected
Connect, positive pole is sequentially connected through resistance R20 VSS pin with conversion chip U after resistance R21.Two poles
The P pole of pipe D6 is connected with the TG pin of conversion chip U, N pole is connected with the positive pole of polar capacitor C7
Connect.The positive pole of polar capacitor C8 is connected with the VSS pin of conversion chip U, negative pole is after resistance R22
It is connected with the OUT pin of conversion chip U.
Wherein, the N pole of diode D8 is connected with the emitter stage of triode VT2, P pole is through resistance R23
It is connected with the OUT pin of conversion chip U afterwards.The positive pole of polar capacitor C10 and the output of amplifier P4
End is connected, negative pole is sequentially connected through resistance R27 P pole with diode D8 after resistance R26.Pole
The property negative pole of electric capacity C9 is connected with the P pole of diode D8, positive pole after resistance R24 with amplifier P4
Positive pole be connected.The P pole of diode D7 VDD pin with conversion chip U after resistance R28 is connected
Connect, N pole is sequentially connected through resistance R29 positive pole with amplifier P4 after resistance R25.
The negative pole of described polar capacitor C7 is as A/D change-over circuit input；Described conversion chip U's
GND pin ground connection, its OSC pin is connected with the P pole of diode D7；Described triode VT2's
Grounded collector, its base stage is connected with the negative pole of polar capacitor C8；The minus earth of described amplifier P4,
Its output as the output of A/D change-over circuit and is connected with the IOA0 pin of FM8PE59A single-chip microcomputer
Connect.
During operation, the signal of telecommunication of vibrating sensor output is through polar capacitor C7 and resistance R19 and diode
The wave filter that D6 is formed is filtered, and this face wave filter can effectively eliminate the interference signal in this signal of telecommunication,
The signal of telecommunication after filtered process is converted to data-signal after being processed by conversion chip U, and these data are believed
Number filter and amplification formed through polar capacitor C8 and triode VT2 and diode D7 and polar capacitor C10
Data-signal is filtered by device again, and this filter amplifier is defeated after being amplified by filtered data-signal simultaneously
Go out, effectively ensure that the accuracy of the data-signal that single-chip microcomputer receives, thus passed through the control do not invented
The accuracy of system work.For preferably implementing the present invention, described conversion chip U the most preferentially uses performance
The integrated chip of stable KD-5608 realizes.
According to above-described embodiment, can well realize the present invention.
Claims (8)
1. a Temperature Intelligent Control System based on A/D change-over circuit, it is characterised in that include monolithic
Machine, the buzzer being all connected with single-chip microcomputer, data storage, power supply, heating element, display screen, A/D
Change-over circuit and signal filtering amplifying circuit, the vibrating sensor being connected with the input of A/D change-over circuit,
And the temperature sensor being connected with the input of signal filtering amplifying circuit；Described A/D change-over circuit
Output is connected with single-chip microcomputer；The output of described signal filtering amplifying circuit is connected with single-chip microcomputer.
A kind of Temperature Intelligent Control System based on A/D change-over circuit the most according to claim 1,
It is characterized in that, described A/D change-over circuit is by conversion chip U, amplifier P4, triode VT2, negative pole
After resistance R19, the TG pin with conversion chip U is connected, positive pole is sequentially through resistance R20 and resistance R21
The TG pipe of polar capacitor C7, the P pole being connected with the VSS pin of conversion chip U afterwards and conversion chip U
The diode D6 that pin is connected, N pole is connected with the positive pole of polar capacitor C7, positive pole and conversion chip U
The pole that VSS pin is connected, negative pole is connected with the OUT pin of conversion chip U after resistance R22
Property electric capacity C8, N pole is connected with the emitter stage of triode VT2, P pole after resistance R23 with conversion chip
The diode D8 that the OUT pin of U is connected, positive pole is connected with the output of amplifier P4, negative pole is suitable
The secondary polar capacitor C10 being connected with the P pole of diode D8 after resistance R26 through resistance R27, negative pole
Be connected with the P pole of diode D8, pole that positive pole positive pole with amplifier P4 after resistance R24 is connected
Property electric capacity C9, and P pole VDD pin with conversion chip U after resistance R28 is connected, N is the most suitable
The secondary diode D7 composition being connected through resistance R29 positive pole with amplifier P4 after resistance R25；Described
The negative pole of polar capacitor C7 is as A/D change-over circuit input；The GND pin of described conversion chip U connects
Ground, its OSC pin is connected with the P pole of diode D7；The grounded collector of described triode VT2,
Its base stage is connected with the negative pole of polar capacitor C8；The minus earth of described amplifier P4, its output conduct
The output of A/D change-over circuit.
A kind of Temperature Intelligent Control System based on A/D change-over circuit the most according to claim 2,
It is characterized in that, described signal filtering amplifying circuit includes that the signal that input is connected with temperature sensor is adopted
Collector, the double rank filter amplification circuit being connected with the output of signal acquisition circuit with output；Described
The output of double rank filter amplification circuit is connected with single-chip microcomputer.
A kind of Temperature Intelligent Control System based on A/D change-over circuit the most according to claim 3,
It is characterized in that, described signal acquisition circuit by amplifier P1, positive pole after resistance R1 with amplifier P1's
Positive pole is connected, negative pole as the polar capacitor C1 of the input of signal acquisition circuit, negative pole is through adjustable resistance
After R3, the output with amplifier P1 is connected, positive pole negative pole with amplifier P1 after resistance R2 is connected
Polar capacitor C2, the N pole connect is connected with the output of amplifier P1, P pole after resistance R4 with amplification
The diode D1 that the positive pole of device P1 is connected, and one end is connected with the positive pole of amplifier P1, the other end
The resistance R5 composition being connected with the output of amplifier P1；The output of described amplifier P1 is as signal
The output of Acquisition Circuit.
A kind of Temperature Intelligent Control System based on A/D change-over circuit the most according to claim 4,
It is characterized in that, described pair of rank filter amplification circuit is by amplifier P2, amplifier P2, triode VT1, N
Pole is connected with the positive pole of amplifier P2, P pole output with amplifier P1 after resistance R6 is connected
Diode D2, positive pole P pole with diode D2 after resistance R10 is connected, the polarity electricity of minus earth
Hold C4, negative pole output with amplifier P2 after resistance R11 is connected, positive pole sequentially through resistance R8 and
The negative pole of the polar capacitor C3 being connected with the P pole of diode D2 after resistance R7, negative pole and amplifier P2
Be connected, polar capacitor C5, P pole that positive pole output with amplifier P2 after resistance R12 is connected
After resistance R13, the negative pole with amplifier P2 is connected, N pole is connected with the output of amplifier P2
Diode D4, negative pole positive pole with amplifier P3 after resistance R16 is connected, positive pole is with amplifier P2's
Polar capacitor C6, the P pole that output is connected negative pole with polar capacitor C6 after resistance R14 is connected,
The diode D3 that N pole tie point with resistance R8 with resistance R7 after resistance R9 is connected, one end and pole
The resistance R15 that negative pole is connected, the other end is connected with the base stage of triode VT1 of property electric capacity C6, and
P pole is connected with the output of amplifier P3, N pole sequentially after resistance R18 and resistance R17 with triode
The diode D5 composition that the emitter stage of VT1 is connected；The minus earth of described amplifier P2；Described three poles
The grounded collector of pipe VT1, the minus earth of described amplifier P3, its output is as double rank filter and amplification
The output of circuit.
A kind of Temperature Intelligent Control System based on A/D change-over circuit the most according to claim 5,
It is characterized in that, described temperature sensor is DS18B20 temperature sensor；Described vibrating sensor is
TR355B vibrating sensor.
A kind of Temperature Intelligent Control System based on A/D change-over circuit the most according to claim 6,
It is characterized in that, described conversion chip U is the integrated chip of KD-5608.
A kind of Temperature Intelligent Control System based on A/D change-over circuit the most according to claim 7,
It is characterized in that, described display screen is the LCDs having and touching regulatory function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610228516.0A CN105867457A (en) | 2016-04-13 | 2016-04-13 | Intelligent temperature control system based on A/D conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610228516.0A CN105867457A (en) | 2016-04-13 | 2016-04-13 | Intelligent temperature control system based on A/D conversion circuit |
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| Publication Number | Publication Date |
|---|---|
| CN105867457A true CN105867457A (en) | 2016-08-17 |
Family
ID=56636831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610228516.0A Pending CN105867457A (en) | 2016-04-13 | 2016-04-13 | Intelligent temperature control system based on A/D conversion circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108464737A (en) * | 2018-03-30 | 2018-08-31 | 杨自忠 | Multi-functional timing chafing dish |
| CN113455907A (en) * | 2021-08-18 | 2021-10-01 | 深圳市维展电子显示科技有限公司 | Intelligent temperature control drinking water system |
-
2016
- 2016-04-13 CN CN201610228516.0A patent/CN105867457A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108464737A (en) * | 2018-03-30 | 2018-08-31 | 杨自忠 | Multi-functional timing chafing dish |
| CN113455907A (en) * | 2021-08-18 | 2021-10-01 | 深圳市维展电子显示科技有限公司 | Intelligent temperature control drinking water system |
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Application publication date: 20160817 |
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| WD01 | Invention patent application deemed withdrawn after publication |