CN209589271U - A kind of dedicated temperature sensing device of electric oven - Google Patents
A kind of dedicated temperature sensing device of electric oven Download PDFInfo
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- CN209589271U CN209589271U CN201920239397.8U CN201920239397U CN209589271U CN 209589271 U CN209589271 U CN 209589271U CN 201920239397 U CN201920239397 U CN 201920239397U CN 209589271 U CN209589271 U CN 209589271U
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Abstract
The utility model discloses a kind of dedicated temperature sensing devices of electric oven, including Digital Display Circuit control unit, temperature detecting unit, acousto-optic warning unit and temperature control unit；Operational amplifier cascade increases signal amplification factor, guarantees the accuracy of temperature sensor U1 outgoing signal；Digital Display Circuit control unit, which receives, to be converted into digital signal after the electric signal of temperature detecting unit and shows on liquid crystal display LCD1；When detecting that operating temperature is higher than preset range, buzzer BUZ1, light emitting diode the D3 connection of acousto-optic warning unit start to alarm；The input terminal of temperature control unit is connect with the integrated chip U2 of Digital Display Circuit control unit, and when detecting temperature higher than preset range, relay RL1 is disconnected, external heater circuit does not work, when detecting temperature lower than preset range, relay RL1 is connected, and external heater circuit is started to work.The circuit structure of the utility model is simple, and detection temperature may be implemented and control, accuracy is very high, and reliability is stronger.
Description
Technical field
The utility model relates to temperature inductor field, it particularly relates to a kind of dedicated temperature sensing device of electric oven,
It can be used in the temperature control system of electric oven, so that the variation by a small margin of electric oven temperature is monitored, it is accurate in real time to grasp
It temperature regime and is adjusted in electric oven.
Background technique
In industrial production and daily life, temperature detection and control technology are widely used every field, wherein
Including auto industry field.In traditional temperature measurement system, temperature element has a thermocouple and thermal resistance, but thermocouple and heat
The output of resistance is generally voltage, and convert voltages into temperature and also need some external hardware circuits, and hardware circuit is set
The debugging of meter and software is all more complicated.
Temperature sensor refers to the sensor that can be experienced temperature and be converted into usable output signal, as temperature measurement system
In main components, temperature sensor it is various in style.Contact and contactless two major classes, meeting can be divided by measurement method
Use the electronic component of some positive temperature coefficients and negative temperature coefficient.
A kind of element of temperature coefficient is applied alone in existing temperature sensor more, causes the accurate of sensing system measurement temperature
Property is affected, and application condition is big, can not adjust temperature at any time as needed.
Utility model content
For the problems in the relevant technologies, the utility model proposes a kind of dedicated temperature sensing devices of electric oven, to overcome
Above-mentioned technical problem present in existing the relevant technologies.
The technical solution of the utility model is achieved in that
A kind of dedicated temperature sensing device of electric oven, including Digital Display Circuit control unit, temperature detecting unit, sound-light alarm
Unit and temperature control unit；
The output end of temperature detecting unit and the input terminal of Digital Display Circuit control unit are attached, and Digital Display Circuit control is single
The input terminal connection of the input terminal, temperature control unit of the output end and acousto-optic warning unit of member；
Temperature detecting unit, including temperature sensor U1, operational amplifier U3:A, metal-oxide-semiconductor Q1, capacitor C4, capacitor C5, electricity
Hold C6, capacitor C7, capacitor C8, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, two pole resistance R7, resistance R8 and pressure stabilizing
Pipe D1；
The 1st pin of temperature sensor U1 one end, described with one end of the capacitor C5, the resistance R4 respectively
One end of resistance R8, the zener diode D1 cathode connected with the negative supply of the operational amplifier U3:A, the capacitor
The other end of C5 is grounded, another termination supply voltage of the resistance R8, the plus earth of the zener diode D1, the temperature
The 2nd pin of degree sensor U1 is connect with one end of one end of the resistance R2, the capacitor C4 respectively, and the capacitor C4's is another
One end is connect with the pole G of one end of the resistance R3, the metal-oxide-semiconductor Q1 respectively, the pole D of the metal-oxide-semiconductor Q1 respectively with the electricity
The other end of the other end, the resistance R4 that hinder R3 is connected with one end of the resistance R5, the other end of the resistance R5 and institute
One end connection of capacitor C6 is stated, the other end of the capacitor C6 is connect with the end b of the operational amplifier U3:A, and the operation is put
The end a of big device U3:A is connect with one end of one end of the resistance R6, one end of the resistance R7 and the capacitor C8 respectively, institute
The other end for stating resistance R6 is connect with one end of the capacitor C7, the end o of the operational amplifier U3:A respectively with the resistance
The other end connection of the other end of R7, the capacitor C8, the 3rd pin of the temperature sensor U1 are another with the resistance R2's
End, the pole S of the metal-oxide-semiconductor Q1, the other end of the capacitor C7 and the operational amplifier U3:A positive supply be grounded, it is described
Temperature sensor U1 is integrated temperature sensor LM35, and the operational amplifier U3:A is integrated operational amplifier LF324；
The Digital Display Circuit control unit includes integrated chip U2, resistance R1, capacitor C1, capacitor C2, capacitor C3, crystal oscillator
X1, liquid crystal display LCD1, potentiometer RV1 and integrated chip U4；
The 3rd pin of the integrated chip U2 respectively with the other end of the resistance R7, the capacitor C8 the other end and
The end o of the operational amplifier U3:A connects, the 9th pin of the integrated chip U2 respectively with one end of the resistance R1, institute
State one end connection of capacitor C1, another termination supply voltage of the capacitor C1, the other end ground connection of the resistance R1, the collection
It is connect at the 10th pin of chip U2 with the 6th pin of the integrated chip U4, the 11st pin of the integrated chip U2 and institute
State the 5th pin connection of integrated chip U4, the 1st pin of the integrated chip U4 and the 2nd pin, the institute of the integrated chip U4
7th pin of the 3rd pin and the integrated chip U4 of stating integrated chip U4 is grounded, and the integrated chip U4 is data storage
Device 24C02C, the 18th pin of the integrated chip U2 are connect with one end of one end of the capacitor C2, the crystal oscillator X1 respectively,
The other end of the capacitor C2 and one end of the capacitor C3 are grounded, the 19th pin of the integrated chip U2 respectively with it is described
The other end connection of the other end of capacitor C3, the crystal oscillator X1, the 25th pin of the integrated chip U2 and the liquid crystal display
Shield the 4th pin connection of LCD1, the 26th pin of the integrated chip U2 and the 5th pin of the liquid crystal display LCD1 connect
It connects, the 28th pin of the integrated chip U2 is connect with the 6th pin of the liquid crystal display LCD1, the integrated chip U2's
31st pin connects supply voltage, and the 32nd pin of the integrated chip U2 and the 14th pin of the liquid crystal display LCD1 connect
It connects, the 33rd pin of the integrated chip U2 is connect with the 13rd pin of the liquid crystal display LCD1, the integrated chip U2
The 34th pin connect with the 12nd pin of the liquid crystal display LCD1, the 35th pin of the integrated chip U2 and the liquid
The 11st pin of crystal display screen LCD1 connects, the 36th pin of the integrated chip U2 and the 10th of the liquid crystal display LCD1
Pin connection, the 37th pin of the integrated chip U2 are connect with the 9th pin of the liquid crystal display LCD1, the integrated core
The 38th pin of piece U2 is connect with the 8th pin of the liquid crystal display LCD1, the 39th pin of the integrated chip U2 and institute
The 7th pin connection of liquid crystal display LCD1 is stated, the integrated chip U2 is single-chip computer AT89C52, the liquid crystal display
LCD1 liquid crystal display LM016L；
The acousto-optic warning unit includes diode D2, light emitting diode D3, capacitor C9, resistance R9, resistance R10, metal-oxide-semiconductor
Q2, metal-oxide-semiconductor Q3 and buzzer BUZ1；
One end of the resistance R9 is connect with the 27th pin of the integrated chip U2, the other end of the resistance R9 and institute
State the pole the G connection of metal-oxide-semiconductor Q2, the pole D of the metal-oxide-semiconductor Q2 anode with one end of the capacitor C9, the diode D2 respectively
It is connected with one end of the buzzer BUZ1, the pole S of the metal-oxide-semiconductor Q2 is positive, described with the light emitting diode D3 respectively
One end of resistance R10 connects, and the other end of the resistance R10 is connect with the pole G of the metal-oxide-semiconductor Q3, the pole D of the metal-oxide-semiconductor Q3
Connect with the cathode of the diode D2, the pole S of the metal-oxide-semiconductor Q3 respectively with the cathode of the light emitting diode D3, the electricity
The other end for holding C9 is connected with the other end of the buzzer BUZ1；
The temperature control unit include resistance R11, resistance R12, resistance R13, metal-oxide-semiconductor Q4, light emitting diode D4 and after
Electric appliance RL1；
One end of the resistance R11 is connect with the 12nd pin of the integrated chip U2, the other end point of the resistance R11
It is not connect with the pole G of one end of the resistance R12, the metal-oxide-semiconductor Q4, the other end ground connection of the resistance R12, the metal-oxide-semiconductor
The pole S of Q4 is grounded, the pole D of metal-oxide-semiconductor Q4 one end with positive, the described relay RL1 of the light emitting diode D4 respectively
Connection, the cathode of the light emitting diode D4 connect with one end of the resistance R13, the other end of the resistance R13 with it is described
The other end of relay RL1 connects supply voltage.
Further, the resistance value of the resistance R1 is 150 Ω；The electricity of the resistance R2, the resistance R3, the resistance R4
Resistance value is 1k Ω；The potentiometer RV1 is linear potentiometer.
Further, the metal-oxide-semiconductor Q1, the metal-oxide-semiconductor Q3, the metal-oxide-semiconductor Q4 are N-channel MOS pipe, the metal-oxide-semiconductor Q2
For P-channel metal-oxide-semiconductor.
Further, the capacitance size of the capacitor C3 and the capacitor C4 are 100pF.
It is mended the utility model has the following beneficial effects: Cascaded amplification circuit can provide stable temperature for temperature detecting unit
It repays, strengthens the accuracy of temperature measurement, temperature control unit can also be according to preset model while detecting ambient temperature
Adjusting temperature is enclosed, design is simple, and degree of safety is high, and use scope is very wide.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is the dedicated temperature sensing device circuit diagram of a kind of electric oven according to the utility model embodiment.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art's every other embodiment obtained, all belongs to
In the range of the utility model protection.
Embodiment according to the present utility model provides a kind of dedicated temperature sensing device of electric oven.
As shown in Figure 1, according to the dedicated temperature sensing device of electric oven of the utility model embodiment, including Digital Display Circuit control
Unit, temperature detecting unit, acousto-optic warning unit and temperature control unit processed；
The output end of temperature detecting unit and the input terminal of Digital Display Circuit control unit are attached, and Digital Display Circuit control is single
The input terminal connection of the input terminal, temperature control unit of the output end and acousto-optic warning unit of member；
Temperature detecting unit, including temperature sensor U1, operational amplifier U3:A, metal-oxide-semiconductor Q1, capacitor C4, capacitor C5, electricity
Hold C6, capacitor C7, capacitor C8, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, two pole resistance R7, resistance R8 and pressure stabilizing
Pipe D1；
The 1st pin of temperature sensor U1 one end, described with one end of the capacitor C5, the resistance R4 respectively
One end of resistance R8, the zener diode D1 cathode connected with the negative supply of the operational amplifier U3:A, the capacitor
The other end of C5 is grounded, another termination supply voltage of the resistance R8, the plus earth of the zener diode D1, the temperature
The 2nd pin of degree sensor U1 is connect with one end of one end of the resistance R2, the capacitor C4 respectively, and the capacitor C4's is another
One end is connect with the pole G of one end of the resistance R3, the metal-oxide-semiconductor Q1 respectively, the pole D of the metal-oxide-semiconductor Q1 respectively with the electricity
The other end of the other end, the resistance R4 that hinder R3 is connected with one end of the resistance R5, the other end of the resistance R5 and institute
One end connection of capacitor C6 is stated, the other end of the capacitor C6 is connect with the end b of the operational amplifier U3:A, and the operation is put
The end a of big device U3:A is connect with one end of one end of the resistance R6, one end of the resistance R7 and the capacitor C8 respectively, institute
The other end for stating resistance R6 is connect with one end of the capacitor C7, the end o of the operational amplifier U3:A respectively with the resistance
The other end connection of the other end of R7, the capacitor C8, the 3rd pin of the temperature sensor U1 are another with the resistance R2's
End, the pole S of the metal-oxide-semiconductor Q1, the other end of the capacitor C7 and the operational amplifier U3:A positive supply be grounded；
The Digital Display Circuit control unit includes integrated chip U2, resistance R1, capacitor C1, capacitor C2, capacitor C3, crystal oscillator
X1, liquid crystal display LCD1, potentiometer RV1 and integrated chip U4；
The 3rd pin of the integrated chip U2 respectively with the other end of the resistance R7, the capacitor C8 the other end and
The end o of the operational amplifier U3:A connects, the 9th pin of the integrated chip U2 respectively with one end of the resistance R1, institute
State one end connection of capacitor C1, another termination supply voltage of the capacitor C1, the other end ground connection of the resistance R1, the collection
It is connect at the 10th pin of chip U2 with the 6th pin of the integrated chip U4, the 11st pin of the integrated chip U2 and institute
State the 5th pin connection of integrated chip U4, the 1st pin of the integrated chip U4 and the 2nd pin, the institute of the integrated chip U4
7th pin of the 3rd pin and the integrated chip U4 of stating integrated chip U4 is grounded, the 18th pin of the integrated chip U2
It is connect respectively with one end of one end of the capacitor C2, the crystal oscillator X1, the other end of the capacitor C2 is with the capacitor C3's
One end is grounded, the 19th pin of the integrated chip U2 respectively with the other end of the capacitor C3, the crystal oscillator X1 it is another
End connection, the 25th pin of the integrated chip U2 are connect with the 4th pin of the liquid crystal display LCD1, the integrated chip
The 26th pin of U2 is connect with the 5th pin of the liquid crystal display LCD1, the 28th pin of the integrated chip U2 with it is described
The 6th pin of liquid crystal display LCD1 connects, and the 31st pin of the integrated chip U2 meets supply voltage, the integrated chip U2
The 32nd pin connect with the 14th pin of the liquid crystal display LCD1, the 33rd pin of the integrated chip U2 and the liquid
The 13rd pin of crystal display screen LCD1 connects, the 34th pin of the integrated chip U2 and the 12nd of the liquid crystal display LCD1
Pin connection, the 35th pin of the integrated chip U2 are connect with the 11st pin of the liquid crystal display LCD1, described integrated
The 36th pin of chip U2 is connect with the 10th pin of the liquid crystal display LCD1, the 37th pin of the integrated chip U2 with
The 9th pin of the liquid crystal display LCD1 connects, the 38th pin and the liquid crystal display LCD1 of the integrated chip U2
The connection of the 8th pin, the 39th pin of the integrated chip U2 connect with the 7th pin of the liquid crystal display LCD1；
The acousto-optic warning unit includes diode D2, light emitting diode D3, capacitor C9, resistance R9, resistance R10, metal-oxide-semiconductor
Q2, metal-oxide-semiconductor Q3 and buzzer BUZ1；
One end of the resistance R9 is connect with the 27th pin of the integrated chip U2, the other end of the resistance R9 and institute
State the pole the G connection of metal-oxide-semiconductor Q2, the pole D of the metal-oxide-semiconductor Q2 anode with one end of the capacitor C9, the diode D2 respectively
It is connected with one end of the buzzer BUZ1, the pole S of the metal-oxide-semiconductor Q2 is positive, described with the light emitting diode D3 respectively
One end of resistance R10 connects, and the other end of the resistance R10 is connect with the pole G of the metal-oxide-semiconductor Q3, the pole D of the metal-oxide-semiconductor Q3
Connect with the cathode of the diode D2, the pole S of the metal-oxide-semiconductor Q3 respectively with the cathode of the light emitting diode D3, the electricity
The other end for holding C9 is connected with the other end of the buzzer BUZ1；
The temperature control unit include resistance R11, resistance R12, resistance R13, metal-oxide-semiconductor Q4, light emitting diode D4 and after
Electric appliance RL1；
One end of the resistance R11 is connect with the 12nd pin of the integrated chip U2, the other end point of the resistance R11
It is not connect with the pole G of one end of the resistance R12, the metal-oxide-semiconductor Q4, the other end ground connection of the resistance R12, the metal-oxide-semiconductor
The pole S of Q4 is grounded, the pole D of metal-oxide-semiconductor Q4 one end with positive, the described relay RL1 of the light emitting diode D4 respectively
Connection, the cathode of the light emitting diode D4 connect with one end of the resistance R13, the other end of the resistance R13 with it is described
The other end of relay RL1 connects supply voltage.
In one embodiment, the temperature sensor U1 is a kind of integrated temperature sensor LM35.
In one embodiment, the resistance value of the resistance R1 is 150 Ω；The resistance R2, the resistance R3, the electricity
The resistance value for hindering R4 is 1k Ω；The potentiometer RV1 is a kind of linear potentiometer.
In one embodiment, the metal-oxide-semiconductor Q1, the metal-oxide-semiconductor Q3, the metal-oxide-semiconductor Q4 are a kind of N-channel MOS pipes,
The metal-oxide-semiconductor Q2 is a kind of P-channel metal-oxide-semiconductor.
In one embodiment, the integrated chip U2 is a kind of single-chip computer AT89C52.
In one embodiment, the capacitance size of the capacitor C3 and the capacitor C4 are 100pF.
In one embodiment, the operational amplifier U3:A is a kind of integrated operational amplifier LF324.
In one embodiment, the integrated chip U4 is a kind of data storage 24C02C.
Working principle: temperature sensor U1, operational amplifier U3:A, metal-oxide-semiconductor Q1, capacitor C4, capacitor C5, capacitor C6, electricity
Hold C7, capacitor C8, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8 and zener diode D1
Form temperature detecting unit；The temperature sensor U1 detects the temperature of working environment, and this data is passed out
It goes；The operational amplifier U3:A, the metal-oxide-semiconductor Q1, the capacitor C4, the capacitor C5, the capacitor C6, the capacitor
C7, the capacitor C8, the resistance R2, the resistance R3, the resistance R4, the resistance R5, the resistance R6, the resistance
The effect of R7, the resistance R8 and the zener diode D1 are composition Cascaded amplification circuits, play the effect of amplified signal,
Improve the accuracy of temperature measurement；After the temperature sensor U1 detects ambient temperature signal, electric signal is converted to
By Cascaded amplification circuit, guarantees that signal is undistorted, that is, ensure that the accuracy of measurement, so that measurement result is more acurrate.
Integrated chip U2, resistance R1, capacitor C1, capacitor C2, capacitor C3, crystal oscillator X1, liquid crystal display LCD1, potentiometer
RV1 and integrated chip U4 forms Digital Display Circuit control unit；The work of the capacitor C2, the capacitor C3 and the crystal oscillator X1
With being composition crystal oscillating circuit, a clock cycle is provided；The effect of the capacitor C6, the resistance R1 are composition electrification reset electricity
Road, can be with automatic reset system；The effect of the integrated chip U4 is storage data, guarantees that preset temperature range will not be because of data
It malfunctions too much；The effect of the liquid crystal display LCD1 is to receive the signal of the integrated chip U2 to show again.
Diode D2, light emitting diode D3, capacitor C9, resistance R9, resistance R10, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3 and buzzer
BUZ1 forms acousto-optic warning unit；The effect of the light emitting diode D3 is the hair when detecting ambient temperature not in preset range
Light alarm；The effect of the buzzer BUZ1 is to detect the ambient temperature not sounding alarm in preset range；When the temperature
Sensor U1 detects that ambient temperature signal does not deliver a signal to the integrated chip U2, the integrated chip in preset range
U2 output signal passes through the resistance R7 to the metal-oxide-semiconductor Q2, the metal-oxide-semiconductor Q2 conducting, then the metal-oxide-semiconductor Q3 conducting, institute
It states buzzer BUZ1 and starts sounding alarm, the light emitting diode D1 starts luminous alarm.
Temperature is formed including resistance R11, resistance R12, resistance R13, metal-oxide-semiconductor Q4, light emitting diode D4 and relay RL1
Control unit；When detecting that temperature is higher than setting range, the light emitting diode D4 is not turned on, and the relay RL1 is disconnected,
External heater circuit does not work；When detecting temperature lower than setting range, the light emitting diode D4 lights display circuit and opens
Beginning work, the relay RL1 are connected, and external heater circuit is started to work.
In conclusion by means of the above-mentioned technical proposal of the utility model, by designing a kind of dedicated temperature biography of electric oven
Induction device guarantees that signal is undistorted, strengthens the accuracy of temperature measurement by using Cascaded amplification circuit, can be accurately
Complete temperature measurement, increase temperature control unit, can be with regulating and controlling temperature in a certain range, accuracy is very high, reliability compared with
By force, design is simple, and degree of safety is high, and use scope is very wide.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (9)
1. a kind of dedicated temperature sensing device of electric oven, which is characterized in that including Digital Display Circuit control unit, temperature detection list
Member, acousto-optic warning unit and temperature control unit；
The output end of temperature detecting unit and the input terminal of Digital Display Circuit control unit are attached, Digital Display Circuit control unit
The input terminal connection of the input terminal of output end and acousto-optic warning unit, temperature control unit；
Temperature detecting unit, including temperature sensor U1, operational amplifier U3:A, metal-oxide-semiconductor Q1, capacitor C4, capacitor C5, capacitor
C6, capacitor C7, capacitor C8, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8 and zener diode
D1；
The 1st pin of the temperature sensor U1 respectively with one end of the capacitor C5, one end of the resistance R4, the resistance
One end of R8, the zener diode D1 cathode connected with the negative supply of the operational amplifier U3:A, the capacitor C5's
Other end ground connection, another termination supply voltage of the resistance R8, the plus earth of the zener diode D1, the temperature pass
The 2nd pin of sensor U1 is connect with one end of one end of the resistance R2, the capacitor C4 respectively, the other end of the capacitor C4
Connect respectively with the pole G of one end of the resistance R3, the metal-oxide-semiconductor Q1, the pole D of the metal-oxide-semiconductor Q1 respectively with the resistance R3
The other end, the resistance R4 the other end connected with one end of the resistance R5, the other end of the resistance R5 and the electricity
Hold one end connection of C6, the other end of the capacitor C6 is connect with the end b of the operational amplifier U3:A, the operational amplifier
The end a of U3:A is connect with one end of one end of the resistance R6, one end of the resistance R7 and the capacitor C8 respectively, the electricity
The other end of resistance R6 is connect with one end of the capacitor C7, and the end o of the operational amplifier U3:A is respectively with the resistance R7's
The other end of the other end connection of the other end, the capacitor C8, the 3rd pin of the temperature sensor U1 and the resistance R2,
The positive supply of the pole S of the metal-oxide-semiconductor Q1, the other end of the capacitor C7 and the operational amplifier U3:A is grounded；
The Digital Display Circuit control unit includes integrated chip U2, resistance R1, capacitor C1, capacitor C2, capacitor C3, crystal oscillator X1, liquid
Crystal display screen LCD1, potentiometer RV1 and integrated chip U4；
The 3rd pin of the integrated chip U2 respectively with the other end of the resistance R7, the other end of the capacitor C8 and described
The end o of operational amplifier U3:A connects, the 9th pin of the integrated chip U2 respectively with one end of the resistance R1, the electricity
Hold one end connection of C1, another termination supply voltage of the capacitor C1, the other end ground connection of the resistance R1, the integrated core
The 10th pin of piece U2 is connect with the 6th pin of the integrated chip U4, the 11st pin and the collection of the integrated chip U2
It is connected at the 5th pin of chip U4, the 1st pin of the integrated chip U4 and the 2nd pin, the collection of the integrated chip U4
It is grounded at the 3rd pin of chip U4 and the 7th pin of the integrated chip U4, the 18th pin difference of the integrated chip U2
It is connect with one end of one end of the capacitor C2, the crystal oscillator X1, one end of the other end of the capacitor C2 and the capacitor C3
It is grounded, the 19th pin of the integrated chip U2 connects with the other end of the other end of the capacitor C3, the crystal oscillator X1 respectively
It connects, the 25th pin of the integrated chip U2 is connect with the 4th pin of the liquid crystal display LCD1, the integrated chip U2's
26th pin is connect with the 5th pin of the liquid crystal display LCD1, the 28th pin and the liquid crystal of the integrated chip U2
The 6th pin of display screen LCD1 connects, and the 31st pin of the integrated chip U2 connects supply voltage, and the of the integrated chip U2
32 pins are connect with the 14th pin of the liquid crystal display LCD1, the 33rd pin of the integrated chip U2 and the liquid crystal
The 13rd pin of display screen LCD1 connects, the 34th pin of the integrated chip U2 and the 12nd pin of the liquid crystal display LCD1
Connection, the 35th pin of the integrated chip U2 are connect with the 11st pin of the liquid crystal display LCD1, the integrated chip
The 36th pin of U2 is connect with the 10th pin of the liquid crystal display LCD1, the 37th pin of the integrated chip U2 with it is described
The 9th pin of liquid crystal display LCD1 connects, the 38th pin of the integrated chip U2 and the 8th of the liquid crystal display LCD1
Pin connection, the 39th pin of the integrated chip U2 are connect with the 7th pin of the liquid crystal display LCD1；
The acousto-optic warning unit include diode D2, light emitting diode D3, capacitor C9, resistance R9, resistance R10, metal-oxide-semiconductor Q2,
Metal-oxide-semiconductor Q3 and buzzer BUZ1；
One end of the resistance R9 is connect with the 27th pin of the integrated chip U2, the other end of the resistance R9 with it is described
The pole G of metal-oxide-semiconductor Q2 connects, the pole D of the metal-oxide-semiconductor Q2 respectively with one end of the capacitor C9, the diode D2 anode and
One end of the buzzer BUZ1 connects, the pole S of the metal-oxide-semiconductor Q2 respectively with positive, the described electricity of the light emitting diode D3
Hinder one end connection of R10, the other end of the resistance R10 connect with the pole G of the metal-oxide-semiconductor Q3, the pole D of the metal-oxide-semiconductor Q3 and
The cathode of the diode D2 connects, the pole S of the metal-oxide-semiconductor Q3 respectively with the cathode of the light emitting diode D3, the capacitor
The other end of C9 is connected with the other end of the buzzer BUZ1；
The temperature control unit includes resistance R11, resistance R12, resistance R13, metal-oxide-semiconductor Q4, light emitting diode D4 and relay
RL1；
One end of the resistance R11 is connect with the 12nd pin of the integrated chip U2, the other end of the resistance R11 respectively with
The pole the G connection of one end of the resistance R12, the metal-oxide-semiconductor Q4, the other end ground connection of the resistance R12, the S of the metal-oxide-semiconductor Q4
Pole ground connection, the pole D of the metal-oxide-semiconductor Q4 are connect with one end of positive, the described relay RL1 of the light emitting diode D4 respectively,
The cathode of the light emitting diode D4 is connect with one end of the resistance R13, the other end and the relay of the resistance R13
The other end of RL1 connects supply voltage.
2. the dedicated temperature sensing device of a kind of electric oven according to claim 1, which is characterized in that the temperature sensor
U1 is integrated temperature sensor LM35.
3. the dedicated temperature sensing device of a kind of electric oven according to claim 1, which is characterized in that the electricity of the resistance R1
Resistance value is 150 Ω；The resistance R2, the resistance R3, the resistance R4 resistance value be 1k Ω；The potentiometer RV1 is
Linear potentiometer.
4. the dedicated temperature sensing device of a kind of electric oven according to claim 1, which is characterized in that the metal-oxide-semiconductor Q1, institute
State metal-oxide-semiconductor Q3, the metal-oxide-semiconductor Q4 is N-channel MOS pipe, the metal-oxide-semiconductor Q2 be P-channel metal-oxide-semiconductor.
5. the dedicated temperature sensing device of a kind of electric oven according to claim 1, which is characterized in that the integrated chip U2
For single-chip computer AT89C52.
6. the dedicated temperature sensing device of a kind of electric oven according to claim 1, which is characterized in that the capacitor C2 and institute
The capacitance size for stating capacitor C3 is 100pF.
7. the dedicated temperature sensing device of a kind of electric oven according to claim 1, which is characterized in that the operational amplifier
U3:A is integrated operational amplifier LF324.
8. the dedicated temperature sensing device of a kind of electric oven according to claim 1, which is characterized in that the integrated chip U4
For data storage 24C02C.
9. the dedicated temperature sensing device of a kind of electric oven according to claim 1, which is characterized in that the liquid crystal display
LCD1 liquid crystal display LM016L.
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| CN201920239397.8U CN209589271U (en) | 2019-02-22 | 2019-02-22 | A kind of dedicated temperature sensing device of electric oven |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112130512A (en) * | 2020-10-20 | 2020-12-25 | 江西鸿利光电有限公司 | System for real-time monitoring of temperature of LED oven and realization of overtemperature voice alarm |
| WO2021120432A1 (en) * | 2019-12-19 | 2021-06-24 | 南京盖乐普电子科技有限公司 | Pop-lid type thermal insulation cup provided with side temperature display |
-
2019
- 2019-02-22 CN CN201920239397.8U patent/CN209589271U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021120432A1 (en) * | 2019-12-19 | 2021-06-24 | 南京盖乐普电子科技有限公司 | Pop-lid type thermal insulation cup provided with side temperature display |
| CN112130512A (en) * | 2020-10-20 | 2020-12-25 | 江西鸿利光电有限公司 | System for real-time monitoring of temperature of LED oven and realization of overtemperature voice alarm |
| CN112130512B (en) * | 2020-10-20 | 2024-05-28 | 江西鸿利光电有限公司 | System for real-time monitoring of temperature of LED oven and realizing over-temperature voice alarm |
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