CN203502852U - Wireless temperature control system - Google Patents
Wireless temperature control system Download PDFInfo
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- CN203502852U CN203502852U CN201320573182.2U CN201320573182U CN203502852U CN 203502852 U CN203502852 U CN 203502852U CN 201320573182 U CN201320573182 U CN 201320573182U CN 203502852 U CN203502852 U CN 203502852U
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/026—Means for indicating or recording specially adapted for thermometers arrangements for monitoring a plurality of temperatures, e.g. by multiplexing
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Abstract
The utility model discloses a wireless temperature control system, and relates to the field of temperature detection. The wireless temperature control system collects temperature in a granary and other places through a receiving end and a transmitting end, realizes accurate collection of the temperature through an electric signal amplification circuit, a digital signal amplitude modulator circuit, a transmission tuning circuit, a first CPU control unit, a second CPU control unit and the like, and also can display the detected temperature in real time through a digital display tube. When a user finds out that the detected temperature is not within a standard working range, the user can regulate the temperature of the granary and the other places in time so as to avoid over-wet or over-dry or other conditions. The wireless temperature control system improves temperature detection accuracy, saves labor force, reduces cost, and meets various requirements in practical application.
Description
Technical field
The utility model relates to thermometer, particularly a kind of wireless temperature control system.
Background technology
Development along with national economic development, grain storing granary, civilian green house of vegetables, civilian cultivation base etc. are in the urgent need to realizing these local automatic managements, realize automatic management and just must carry out multiple spot monitoring constantly automatically to temperature, current a lot of places are because the reason of technology and cost is difficult to accomplish.The civilian booth that comprises, although cultivation base is also used multiple spot to detect, but be all to utilize manually a plurality of points to carry out one by one single-point monitoring, the single record that carries out one by one, cannot accomplish so constantly a plurality of monitoring points to be monitored simultaneously, and what adopt is alcohol formula thermometer, the variation of environment temperature is had to certain time delay, lost labor not only, time-consuming, effort, and effect is also bad, because having people to enter concrete scene, needs go to observe and record, one-in-and-one-out can make a big impact to whole ecologic environment like this, be unfavorable for the growth of plant, and such management also cannot realize whole automatic control, the scientific management of a high yield also cannot be realized, the automatic temperature monitoring system having had is at present because cost is too high, and use complicated, peasant cannot accept and operate, in addition, although adopt at present multipoint temperature monitoring for national grain storage, but mostly adopt wired monitoring, watch-dog is complicated, once the damaged monitoring of circuit is just malfunctioning, and owing to adopting, wired long-time circuit that can cause damaged later, so not only increases cost and also can cause line short and initiation fire.
Utility model content
The utility model provides a kind of wireless temperature control system, and the utility model has improved temperature controlled accuracy, has reduced and has become to produce cost, described below:
A wireless temperature control system, comprising: transmitting terminal control circuit, receiving end control circuit, the first power circuit and second source circuit, and described the first power circuit provides 9V and 5V power supply, and described second source circuit provides 3.3V power supply;
Described transmitting terminal control circuit comprises: the temperature sense circuit being electrically connected to successively, amplification circuit of electrical signal, voltage frequency conversioning circuit, the first cpu control circuit, 433MHZ digital signal amplitude modulation circuit and 433MHZ transmitting tuned circuit,
Described temperature sense circuit is converted to the temperature signal sensing voltage signal and transfers to described amplification circuit of electrical signal, the voltage signal that described amplification circuit of electrical signal carries out described voltage signal to export secondary amplification after secondary amplifies is to described voltage frequency conversioning circuit, and described voltage frequency conversioning circuit output voltage pulse signal is to described the first cpu control circuit; After described the first cpu control circuit receives described voltage pulse signal, output digit signals is to described 433MHZ digital signal amplitude modulation circuit, described 433MHZ digital signal amplitude modulation circuit is carried out amplitude modulation to described digital signal, and by the extremely described 433MHZ transmitting of digital data transmission after amplitude modulation tuned circuit, described 433MHZ transmitting tuned circuit to described amplitude modulation after digital signal carry out after secondary filtering, by 433MHZ digital signal after antenna output filtering;
Described receiving end control circuit comprises: 433MHZ receives tuned circuit, 433MHZ demodulator circuit, the second cpu control circuit and digital display circuit, described 433MHZ receives tuned circuit and receives 433MHZ digital signal, and transfer to described 433MHZ demodulator circuit, described 433MHZ demodulator circuit demodulates described digital signal and transfers to described the second cpu control circuit, described the second cpu control circuit output temperature numeric coding is to the data input pin of digital display circuit, by described digital display circuit displays temperature numerical value.
Described temperature sense circuit comprises: 9V stabilivolt, and the negative electrode of described 9V stabilivolt connects 9V power supply, and the anode of described 9V stabilivolt connects respectively the base stage of the second biasing resistor and the first triode, the second biasing resistor ground connection; The collector of described the first triode connects the first biasing resistor, the emitter of described the first triode connects the anode of temperature-sensitive diode, the plus earth of described temperature-sensitive diode, the anode of described temperature-sensitive diode is exported described voltage signal to described amplification circuit of electrical signal.
Described amplification circuit of electrical signal comprises: the first resistance, described the first resistance connects the first luminosity regulating resistance, described the first luminosity regulating resistance connects the first divider resistance, and described the first divider resistance connects the inverting input of the first input pin of the second divider resistance and operational amplifier simultaneously; The in-phase input end of the first input pin of described operational amplifier connects respectively the second resistance and the 3rd resistance, and described the second resistance connects the voltage signal of described temperature sense circuit output, described the 3rd resistance eutral grounding; The in-phase input end of the second input pin of described operational amplifier connects the first Voltage Feedback sampling resistor, anti-phase input termination the 4th resistance and the 5th resistance of the second input pin of described operational amplifier, the first output pin of described operational amplifier connects the second luminosity regulating resistance, described the second luminosity regulating resistance connects described the 4th resistance, described the 5th resistance connects second voltage feedback sample resistance, described second voltage feedback sample resistance eutral grounding; The second output pin of described operational amplifier is exported the voltage signal of described secondary amplification to described voltage frequency conversioning circuit.
Described voltage frequency conversioning circuit comprises: the 6th resistance, described the 6th resistance connects the voltage signal that described secondary amplifies, described the 6th resistance connects respectively the threshold value pin of the first electric capacity and converter, the electric current output pin of described converter connects described the first electric capacity, and the output reference electric current pin of described converter connects the branch road of the 7th resistance and variable resistor composition; The comparison input pin of described converter connects described the 7th resistance, and the timing circuit pin of described converter connects respectively the 8th resistance and the second electric capacity, the power supply termination 9V power supply of described the 8th resistance and described converter; The frequency output pin of described converter connects the biasing circuit that the 9th resistance, the tenth resistance and the 11 resistance form, described the 11 resistance connects the base stage of the second triode, and the collector of described the second triode is exported described voltage pulse signal to described the first cpu control circuit.
Described the first cpu control circuit comprises: the first single-chip microcomputer, the power supply termination 5V power supply of described the first single-chip microcomputer, the voltage pulse signal input end of described the first single-chip microcomputer accesses the described voltage pulse signal of described voltage frequency conversioning circuit output, the duty of described the first single-chip microcomputer shows the negative electrode of termination pilot lamp, the anode of described pilot lamp connects 5V power supply by the 12 resistance, transmitting modulation power supply control termination the 13 resistance of described the first single-chip microcomputer, described the 13 resistance connects the base stage of the 3rd triode, the collector of described the 3rd triode connects described 433MHZ digital signal amplitude modulation circuit, the emitter of described the 3rd triode connects 9V power supply, the signal output part of described the first single-chip microcomputer is exported described digital signal to described 433MHZ digital signal amplitude modulation circuit.
Described 433MHZ digital signal amplitude modulation circuit comprises: digital am chip, the amplitude modulation keying end of described digital am chip accesses respectively digital signal and the external resistance of described cpu control circuit output, carrier frequency vibration source first input pin of described digital am chip accesses respectively the 3rd electric capacity and the first crystal oscillator, carrier frequency vibration source second input pin of described digital am chip accesses respectively described the first crystal oscillator and the 4th electric capacity, described the 3rd electric capacity and described the 4th capacity earth; After the output pin of described digital am chip is exported described amplitude modulation, digital signal is to described 433MHZ transmitting tuned circuit.
Described 433MHZ transmitting tuned circuit comprises: the first inductance, and described the first inductance connects 9V power supply by the 14 resistance, and described 9V power supply also connects respectively the 5th electric capacity, the 6th electric capacity and the 7th electric capacity; Described inductance also connects respectively the tenth electric capacity and the 11 electric capacity, and described the 11 electric capacity connects the second inductance, and described the second inductance connects respectively antenna and the 8th electric capacity, described the 8th electric capacity and described the tenth capacity earth.
Described 433MHZ receives tuned circuit and comprises: the 3rd inductance, digital signal after described the 3rd inductance accepts filter, described the 3rd inductance is connected with the 14 electric capacity with the 12 electric capacity respectively, described the 14 electric capacity connects respectively the 4th inductance and described 433MHZ demodulator circuit, transmits described 433MHZ digital signal to described 433MHZ demodulator circuit.
Described 433MHZ demodulator circuit comprises: demodulation chip, and the power supply input pin of described demodulation chip connects second source filter capacitor, the 3rd power filtering capacitor, the 5th inductance and 3.3V power supply; The earth terminal ground connection of described demodulation chip, the 3rd pin of described demodulation chip connects described 433MHZ digital signal, the enable pin of described demodulation chip is connected with the Enable Pin of described the second cpu control circuit, demodulation carrier frequency first vibration source of described demodulation chip and demodulation carrier frequency the second vibration source pin connect the second crystal oscillator, and demodulation digital signal out exports the digital signal input end of described the second cpu control circuit to through demodulated digital signal output terminal.
Described the second cpu control circuit comprises: second singlechip, the power supply termination 3.3V power supply of described second singlechip, the latch signal end of digital display circuit described in the latch signal termination of described second singlechip, the 3rd pin output temperature numeric coding of described second singlechip is to the data input pin of described digital display circuit; The clock signal terminal of digital display circuit described in the clock termination of described second singlechip, the digital signal input end of described second singlechip connects the digital signal after the demodulation of described 433MHZ demodulator circuit output, and the Enable Pin of described second singlechip is controlled the Enable Pin of described 433MHZ demodulator circuit.
The beneficial effect of the technical scheme that the utility model provides is: this wireless temperature control system realizes the monitoring temperature to places such as silos by the circuit of receiving end and transmitting terminal, this system is utilized the resistance of semiconductor element and the linear relationship between temperature, the electric signal about temperature variation is obtained in the variation of the semiconductor resistor that temperature variation is caused, then electric signal passes through voltage/frequency change-over circuit through amplifying circuit, frequency change corresponding to temperature variation convert to, by CPU to the calculating of different frequency and comparison, produce with temperature variation with respect to electric signal, again by digital signal amplitude modulation circuit, transmitting tuned circuit, first, the second cpu control circuit etc. has been realized the accurate collection to temperature, and, can also the temperature detecting be carried out to real-time demonstration by digital display tube.When user finds that the temperature detect is not in standard operation scope, the temperature in the place such as silo regulates timely, avoid occurring the situation such as too high or too low for temperature, this wireless temperature control system has improved temperature detecting precision, save manpower and cost, met the multiple needs in practical application.
Accompanying drawing explanation
Fig. 1 is the structural representation of wireless temperature control system;
Fig. 2 is the structural representation of transmitting terminal control circuit;
Fig. 3 is the structural representation of receiving end control circuit;
Fig. 4 is the structural representation of the first power circuit;
Fig. 5 is the structural representation of second source circuit;
Fig. 6 is the structural representation of temperature sense circuit;
Fig. 7 is the structural representation of amplification circuit of electrical signal;
Fig. 8 is the structural representation of voltage frequency conversioning circuit;
Fig. 9 is the structural representation of the first cpu control circuit;
Figure 10 is the structural representation of 433MHZ digital signal amplitude modulation circuit;
Figure 11 is the structural representation of 433MHZ transmitting tuned circuit;
Figure 12 is the structural representation that 433MHZ receives tuned circuit;
Figure 13 is the structural representation of 433MHZ demodulator circuit;
Figure 14 is the structural representation of the second cpu control circuit;
Figure 15 is the structural representation of digital display circuit;
Figure 16 a is the digital schematic diagram showing;
Figure 16 b is digital another schematic diagram showing.
In accompanying drawing, being listed as follows of each parts:
1: transmitting terminal control circuit; 2: receiving end control circuit;
3: the first power circuits; 4: second source circuit;
11: temperature sense circuit; 12: amplification circuit of electrical signal;
13: voltage frequency conversioning circuit; 14: the first cpu control circuits;
15:433MHZ digital signal amplitude modulation circuit; 16:433MHZ launches tuned circuit;
21:433MHZ receives tuned circuit; 22:433MHZ demodulator circuit;
23: the second cpu control circuits; 24: digital display circuit;
BAT1:9V accumulator; Q4:5V stabilivolt;
C12: the first power filtering capacitor; D1:9V stabilivolt;
R1: the first biasing resistor; R2: the second biasing resistor;
Q1: the first triode; DV: temperature-sensitive diode;
R3: the first resistance; RW1: the first luminosity regulating resistance;
R4: the first divider resistance; R5: the second divider resistance;
LM358: operational amplifier; R7: the second resistance;
R8: the 3rd resistance; R6: the 4th resistance;
R9: the 5th resistance; R10: the first Voltage Feedback sampling resistor;
RW2: the second luminosity regulating resistance; R11: second voltage feedback sample resistance;
R12: the 6th resistance; C1: the first electric capacity;
LM331: converter; RW3: variable resistor;
R13: the 7th resistance; R14: the 8th resistance;
R15: the 9th resistance; R16: the tenth resistance;
R17: the 11 resistance; Q2: the second triode;
FQ: voltage pulse signal; U3: the first single-chip microcomputer;
LED1: pilot lamp; R18: 12 resistance;
U1: second singlechip; R19: the 13 resistance;
Q3: the 3rd triode; U4: digital am chip;
R20: external resistance; C3: the 3rd electric capacity;
X1: the first crystal oscillator; C4: the 4th electric capacity;
L1: the first inductance; R21: the 14 resistance;
C5: the 5th electric capacity; C6: the 6th electric capacity;
C7: the 7th electric capacity; C8: the 8th electric capacity;
C10: the tenth electric capacity; C11: the 11 electric capacity;
L2: the second inductance; L3: the 3rd inductance;
C13: the 12 electric capacity; C14: the 14 electric capacity;
L4: the 4th inductance; U2: demodulation chip;
C15: second source filter capacitor; C16: the 3rd power filtering capacitor;
MAX7219: digital chip.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
In order to improve temperature controlled accuracy, be lowered into product cost, the utility model embodiment provides a kind of wireless temperature control system, referring to Fig. 1, described below: this wireless temperature control system comprises: transmitting terminal control circuit 1, receiving end control circuit 2, the first power circuit 3 and second source circuit 4, the first power circuit 3 provides 9V and 5V power supply, and second source circuit 4 provides 3.3V power supply.
Wherein, referring to Fig. 2, transmitting terminal control circuit 1 comprises: the temperature sense circuit 11 being electrically connected to successively, amplification circuit of electrical signal 12, voltage frequency conversioning circuit 13, the first cpu control circuit 14, 433MHZ digital signal amplitude modulation circuit 15 and 433MHZ transmitting tuned circuit 16, temperature sense circuit 11 is converted to the temperature signal sensing voltage signal and transfers to amplification circuit of electrical signal 12, the voltage signal that amplification circuit of electrical signal 12 carries out voltage signal to export secondary amplification after secondary amplifies is to voltage frequency conversioning circuit 13, voltage frequency conversioning circuit 13 output voltage pulse signal to the first cpu control circuits 14, after the first cpu control circuit 14 receiver voltage pulse signals, output digit signals is to 433MHZ digital signal amplitude modulation circuit 15,15 pairs of digital signals of 433MHZ digital signal amplitude modulation circuit are carried out amplitude modulation, and by digital data transmission after amplitude modulation to 433MHZ transmitting tuned circuit 16, after 16 pairs of amplitude modulation of 433MHZ transmitting tuned circuit, digital signal is carried out after secondary filtering, by 433MHZ digital signal after antenna output filtering,
Wherein, referring to Fig. 3, receiving end control circuit 2 comprises: 433MHZ receives tuned circuit 21,433MHZ demodulator circuit 22, the second cpu control circuit 23 and digital display circuit 24,433MHZ receives tuned circuit 21 and receives 433MHZ digital signal, and transfer to 433MHZ demodulator circuit 22,433MHZ demodulator circuit 22 demodulates digital signal and transfers to the second cpu control circuit 23, the second cpu control circuit 23 output temperature numeric codings are to the data input pin DIN of digital display circuit 24, by digital display circuit 24 displays temperature numerical value.
Referring to Fig. 4 and Fig. 5, the first power circuit 3 comprises: 9V accumulator BAT1, the positive pole output 9V power supply VCC of 9V accumulator BAT1, and the voltage input end that connects 5V stabilivolt Q4, the voltage output end output 5V power supply VCC of 5V stabilivolt Q4, the voltage output end of 5V stabilivolt Q4 also connects the positive pole of the first power filtering capacitor C12, and the negative pole of the first power filtering capacitor C12, the earth terminal of 5V stabilivolt Q4 and the negative pole of accumulator BAT1 be ground connection all.Second source circuit 4 is exported 3.3V power supply by external 5V power supply after by voltage stabilizing.
Referring to Fig. 6, temperature sense circuit 11 comprises: 9V stabilivolt D1, and the negative electrode of 9V stabilivolt D1 meets 9V power supply VCC, and the anode of 9V stabilivolt D1 connects respectively the base stage of the second biasing resistor R2 and the first triode Q1, the second biasing resistor R2 ground connection; The collector of the first triode Q1 meets the first biasing resistor R1, the emitter of the first triode Q1 connects the anode of temperature-sensitive diode DV, the plus earth of temperature-sensitive diode DV, the anode of temperature-sensitive diode DV outputs voltage signal to amplification circuit of electrical signal 12, and the temperature signal that is about to detect is converted to voltage signal and exports amplification circuit of electrical signal 12 to.
Referring to Fig. 7, amplification circuit of electrical signal 12 comprises: the first resistance R 3, the first resistance R 3 meets the first luminosity regulating resistance RW1, the first luminosity regulating resistance RW1 meets the first divider resistance R4, and the first divider resistance R4 connects the inverting input of the first input pin of the second divider resistance R5 and operational amplifier LM358 simultaneously; The in-phase input end of the first input pin of operational amplifier LM358 connects respectively the voltage signal of the second resistance R 7 and the 3rd resistance R 8, the second resistance R 7 jointing temp sensor circuit 11 outputs, the 3rd resistance R 8 ground connection; The in-phase input end of the second input pin of operational amplifier LM358 meets the first Voltage Feedback sampling resistor R10, anti-phase input termination the 4th resistance R 6 and the 5th resistance R 9 of the second input pin of operational amplifier LM358, the first output pin of operational amplifier LM358 meets the second luminosity regulating resistance RW2, the second luminosity regulating resistance RW2 connects the 4th resistance R 6, the 5th resistance R 9 connects second voltage feedback sample resistance R 11, second voltage feedback sample resistance R 11 ground connection; The voltage signal that the second output pin output secondary of operational amplifier LM358 amplifies is to voltage frequency conversioning circuit 13.
Wherein, operational amplifier LM358 carries out twice amplification by voltage signal, 2 pin of operational amplifier LM358 are reference signal input ends, 1 pin is LM358 amplifier output terminal for the first time, through the voltage signal that amplifies for the first time again through the second luminosity regulating resistance RW2, the 4th resistance R 6 is input to operational amplifier LM358 the 6th pin and carries out secondary amplification, 5 pin are that reference voltage is relatively held, by the first Voltage Feedback sampling resistor R10 ground connection, by the first Voltage Feedback sampling resistor R10, second voltage feedback sample resistance R 11 can improve the stability of output voltage, the voltage signal amplifying through secondary outputs to voltage frequency conversioning circuit 13 through 7 pin.
Referring to Fig. 8, voltage frequency conversioning circuit 13 comprises: the 6th resistance R 12, the 6th resistance R 12 connects the voltage signal that secondary amplifies, the 6th resistance R 12 meets respectively the threshold value pin THD of the first capacitor C 1 and converter LM331, the electric current output pin C/OUT of converter LM331 connects the first capacitor C 1, and the output reference electric current pin R/C of converter LM331 connects the branch road of the 7th resistance R 13 and variable resistor RW3 composition; The comparison input pin C/IN of converter LM331 connects the 7th resistance R 13, and the timing circuit pin R-C of converter LM331 meets respectively the power supply termination 9V power supply VCC of the 8th resistance R 14 and the second capacitor C 2, the eight resistance R 14 and converter LM331; The frequency output pin F/OUT of converter LM331 connects the biasing circuit that the 9th resistance R 15, the tenth resistance R 16 and the 11 resistance R 17 form, the 11 resistance R 17 connects the base stage of the second triode Q2, collector output voltage pulse signal FQ to the first cpu control circuit 14 of the second triode Q2.
Referring to Fig. 9, the first cpu control circuit 14 comprises: the first single-chip microcomputer U3, the first pin (power end) of the first single-chip microcomputer U3 meets 5V power supply VCC, the voltage pulse signal FQ of the 3rd pin of the first single-chip microcomputer U3 (voltage pulse signal input end GP4/OSC2) access voltage frequency conversioning circuit 13 outputs, the second pin of the first single-chip microcomputer U3 (duty display end GP5/OSC1) connects the negative electrode of pilot lamp LED1, the anode of pilot lamp LED1 meets 5V power supply VCC by the 12 resistance R 18, the 5th pin of the first single-chip microcomputer U3 (transmitting modulation power supply control end GP2) connects the 13 resistance R 19, the 13 resistance R 19 connects the base stage of the 3rd triode Q3, the collector of the 3rd triode Q3 connects 433MHZ digital signal amplitude modulation circuit 15, the emitter of the 3rd triode Q3 meets 9V power supply VCC, the 6th pin (signal output part GP1) output digit signals of the first single-chip microcomputer U3 is to the 8th pin ground connection of 433MHZ digital signal amplitude modulation circuit 15, the first single-chip microcomputer U3, and all the other pins of the first single-chip microcomputer U3 are unsettled.
Wherein, the first single-chip microcomputer U3 adopts the chip of 12F508 model as central processing unit, this chip has house dog and internal oscillator, can reduce peripheral component, the 12 resistance R 18 is pilot lamp divider resistances, the 5th pin of the first single-chip microcomputer U3 is for controlling conducting and the cut-off of the 3rd triode Q3, and during conducting, 15 power supplies of 433MHZ digital signal amplitude modulation circuit are started working, and during cut-off, 433MHZ digital signal amplitude modulation circuit 15 quits work.
Referring to Figure 10, 433MHZ digital signal amplitude modulation circuit 15 comprises: digital am chip U4, the 6th pin of digital am chip U4 (amplitude modulation keying end ASK) accesses respectively digital signal and the external resistance R 20 of cpu control circuit 14 outputs, the 5th pin of digital am chip U4 (carrier frequency vibration source the first input pin XTLIN) accesses respectively the 3rd capacitor C 3 and the first crystal oscillator X1, the 4th pin of digital am chip U4 (carrier frequency vibration source the second input pin XTLOUT) accesses respectively the first crystal oscillator X1 and the 4th capacitor C 4, the 3rd capacitor C 3 and the 4th capacitor C 4 ground connection, the second pin of digital am chip U4 (grounding pin VSS) ground connection, the 3rd pin (power pins VDD) of digital am chip U4 meets 9V power supply VCC, and after the first pin of digital am chip U4 (output pin PAOUT) output amplitude modulation, digital signal is to 433MHZ transmitting tuned circuit 16.
Referring to Figure 11,433MHZ transmitting tuned circuit 16 comprises: the first inductance L 1, the first inductance L 1 meets 9V power supply VCC by the 14 resistance R 21, and 9V power supply VCC also connects respectively the 5th capacitor C 5, the 6th capacitor C 6 and the 7th capacitor C 7; Inductance L 1 also connects respectively the tenth capacitor C 10 and the 11 capacitor C 11, the 11 capacitor C 11 and connects the second inductance L 2, the second inductance L 2 and connect respectively antenna ANT1 and the 8th capacitor C 8, the eight capacitor C 8 and the tenth capacitor C 10 ground connection.
Wherein, the first inductance L 1, the tenth capacitor C 10 and the 11 capacitor C 11 have formed harmonic filter circuit for the first time, the second inductance L 2 and the 8th capacitor C 8 form harmonic filter circuit for the second time, and the 5th capacitor C 5, the 6th capacitor C 6 and the 7th capacitor C 7 are filtering clutter electric capacity.
Referring to Figure 12,433MHZ receives tuned circuit 21 and comprises: the 3rd inductance L 3, digital signal after the 3rd inductance L 3 accepts filter, the 3rd inductance L 3 is connected with the 14 capacitor C 14 with the 12 capacitor C 13 respectively, the 14 capacitor C 14 connects respectively the 4th inductance L 4 and 433MHZ demodulator circuit 22, and transmission 433MHZ digital signal is to 433MHZ demodulator circuit 22.
Referring to Figure 13,433MHZ demodulator circuit 22 comprises: demodulation chip U2, and the power supply input pin VDD of demodulation chip U2 connects second source filter capacitor C15, the 3rd power filtering capacitor C16, the 5th inductance L 5 and 3.3V power supply, the earth terminal ground connection of demodulation chip U2, the 3rd pin (aerial signal input end) of demodulation chip U2 connects 433MHZ digital signal, the 8th pin (enable pin) of demodulation chip U2 is connected with the 6th pin (Enable Pin GP1) of the second cpu control circuit 23, by the second cpu control circuit 23, controlled, the RO1 pin of demodulation chip U2 (demodulation carrier frequency the first vibration source) and RO2(demodulation carrier frequency the second vibration source) pin meets the second crystal oscillator X2, for demodulation chip, U2 provides oscillation source, demodulation digital signal out exports the digital signal input end GP2 of the second cpu control circuit 23 to through the tenth pin (demodulated digital signal output terminal DO).
Wherein, the SQ pin of demodulation chip U2, the 12 pin CTH and the 13 pin CAGC connect peripheral circuit, all the other pins: the 7th pin, the 14 pin and the 15 pin are unsettled.
Referring to Figure 14, the second cpu control circuit 23 comprises: second singlechip U1, the first pin of second singlechip U1 (power end Vcc) meets 3.3V power supply VCC, the second pin of second singlechip U1 (latch signal end GP5/OSC1) meets the latch signal end LOAD of digital display circuit 24, and the 3rd pin output temperature numeric coding of second singlechip U1 is to the data input pin DIN of digital display circuit 24; The 4th pin (GP3 or CLK) of second singlechip U1 meets the clock signal terminal CLK of digital display circuit 24, the 5th pin (digital signal input end GP2) of second singlechip U1 connects the digital signal after the demodulation of 433MHZ demodulator circuit 22 output, and the 6th pin (Enable Pin GP1) of second singlechip U1 is controlled the Enable Pin of 433MHZ demodulator circuit 22; The 7th pin (GPO) of second singlechip U1 is unsettled, the 8th pin (Vss) ground connection of second singlechip U1.
Referring to Figure 15, Figure 16 a and Figure 16 b, digital display circuit 24 comprises: digital chip MAX7219, the power supply termination 5V power supply VCC of digital chip MAX7219, SEG A～SEG G and SEG DP pin are LED7 section drive wire and decimal dotted line, supply with Display Driver electric current; SET pin outer meeting resistance is adjusted LED display brightness; DIN(data input pin), CLK(input end of clock), LOAD(latch signal) pin, form and to be connected with 3 line serials of the second cpu control circuit 23, the data of reception and command format are 16 bit data bags.
Wherein, the present embodiment does not limit the model of components and parts, in addition to special instructions, all can adopt the device that can complete above-mentioned functions all can.
In sum, by this wireless temperature control system, realize the accurate monitoring to place temperature such as silos, avoided the generation of situations such as occurring overdrying or excessively wet, saved time and manpower, improved work efficiency.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, above-mentioned the utility model embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (10)
1. a wireless temperature control system, it is characterized in that, comprise: transmitting terminal control circuit, receiving end control circuit, the first power circuit and second source circuit, described the first power circuit provides 9V and 5V power supply, and described second source circuit provides 3.3V power supply;
Described transmitting terminal control circuit comprises: the temperature sense circuit being electrically connected to successively, amplification circuit of electrical signal, voltage frequency conversioning circuit, the first cpu control circuit, 433MHZ digital signal amplitude modulation circuit and 433MHZ transmitting tuned circuit,
Described temperature sense circuit is converted to the temperature signal sensing voltage signal and transfers to described amplification circuit of electrical signal, the voltage signal that described amplification circuit of electrical signal carries out described voltage signal to export secondary amplification after secondary amplifies is to described voltage frequency conversioning circuit, and described voltage frequency conversioning circuit output voltage pulse signal is to described the first cpu control circuit; After described the first cpu control circuit receives described voltage pulse signal, output digit signals is to described 433MHZ digital signal amplitude modulation circuit, described 433MHZ digital signal amplitude modulation circuit is carried out amplitude modulation to described digital signal, and by the extremely described 433MHZ transmitting of digital data transmission after amplitude modulation tuned circuit, described 433MHZ transmitting tuned circuit to described amplitude modulation after digital signal carry out after secondary filtering, by 433MHZ digital signal after antenna output filtering;
Described receiving end control circuit comprises: 433MHZ receives tuned circuit, 433MHZ demodulator circuit, the second cpu control circuit and digital display circuit, described 433MHZ receives tuned circuit and receives 433MHZ digital signal, and transfer to described 433MHZ demodulator circuit, described 433MHZ demodulator circuit demodulates described digital signal and transfers to described the second cpu control circuit, described the second cpu control circuit output temperature numeric coding is to the data input pin of digital display circuit, by described digital display circuit displays temperature numerical value.
2. a kind of wireless temperature control system according to claim 1, it is characterized in that, described temperature sense circuit comprises: 9V stabilivolt, the negative electrode of described 9V stabilivolt connects 9V power supply, the anode of described 9V stabilivolt connects respectively the base stage of the second biasing resistor and the first triode, the second biasing resistor ground connection; The collector of described the first triode connects the first biasing resistor, the emitter of described the first triode connects the anode of temperature-sensitive diode, the plus earth of described temperature-sensitive diode, the anode of described temperature-sensitive diode is exported described voltage signal to described amplification circuit of electrical signal.
3. a kind of wireless temperature control system according to claim 1, it is characterized in that, described amplification circuit of electrical signal comprises: the first resistance, described the first resistance connects the first luminosity regulating resistance, described the first luminosity regulating resistance connects the first divider resistance, and described the first divider resistance connects the inverting input of the first input pin of the second divider resistance and operational amplifier simultaneously; The in-phase input end of the first input pin of described operational amplifier connects respectively the second resistance and the 3rd resistance, and described the second resistance connects the voltage signal of described temperature sense circuit output, described the 3rd resistance eutral grounding; The in-phase input end of the second input pin of described operational amplifier connects the first Voltage Feedback sampling resistor, anti-phase input termination the 4th resistance and the 5th resistance of the second input pin of described operational amplifier, the first output pin of described operational amplifier connects the second luminosity regulating resistance, described the second luminosity regulating resistance connects described the 4th resistance, described the 5th resistance connects second voltage feedback sample resistance, described second voltage feedback sample resistance eutral grounding; The second output pin of described operational amplifier is exported the voltage signal of described secondary amplification to described voltage frequency conversioning circuit.
4. a kind of wireless temperature control system according to claim 1, it is characterized in that, described voltage frequency conversioning circuit comprises: the 6th resistance, described the 6th resistance connects the voltage signal that described secondary amplifies, described the 6th resistance connects respectively the threshold value pin of the first electric capacity and converter, the electric current output pin of described converter connects described the first electric capacity, and the output reference electric current pin of described converter connects the branch road of the 7th resistance and variable resistor composition; The comparison input pin of described converter connects described the 7th resistance, and the timing circuit pin of described converter connects respectively the 8th resistance and the second electric capacity, the power supply termination 9V power supply of described the 8th resistance and described converter; The frequency output pin of described converter connects the biasing circuit that the 9th resistance, the tenth resistance and the 11 resistance form, described the 11 resistance connects the base stage of the second triode, and the collector of described the second triode is exported described voltage pulse signal to described the first cpu control circuit.
5. a kind of wireless temperature control system according to claim 1, it is characterized in that, described the first cpu control circuit comprises: the first single-chip microcomputer, the power supply termination 5V power supply of described the first single-chip microcomputer, the voltage pulse signal input end of described the first single-chip microcomputer accesses the described voltage pulse signal of described voltage frequency conversioning circuit output, the duty of described the first single-chip microcomputer shows the negative electrode of termination pilot lamp, the anode of described pilot lamp connects 5V power supply by the 12 resistance, transmitting modulation power supply control termination the 13 resistance of described the first single-chip microcomputer, described the 13 resistance connects the base stage of the 3rd triode, the collector of described the 3rd triode connects described 433MHZ digital signal amplitude modulation circuit, the emitter of described the 3rd triode connects 9V power supply, the signal output part of described the first single-chip microcomputer is exported described digital signal to described 433MHZ digital signal amplitude modulation circuit.
6. a kind of wireless temperature control system according to claim 1, it is characterized in that, described 433MHZ digital signal amplitude modulation circuit comprises: digital am chip, the amplitude modulation keying end of described digital am chip accesses respectively digital signal and the external resistance of described cpu control circuit output, carrier frequency vibration source first input pin of described digital am chip accesses respectively the 3rd electric capacity and the first crystal oscillator, carrier frequency vibration source second input pin of described digital am chip accesses respectively described the first crystal oscillator and the 4th electric capacity, described the 3rd electric capacity and described the 4th capacity earth, after the output pin of described digital am chip is exported described amplitude modulation, digital signal is to described 433MHZ transmitting tuned circuit.
7. a kind of wireless temperature control system according to claim 1, it is characterized in that, described 433MHZ transmitting tuned circuit comprises: the first inductance, and described the first inductance connects 9V power supply by the 14 resistance, and described 9V power supply also connects respectively the 5th electric capacity, the 6th electric capacity and the 7th electric capacity; Described inductance also connects respectively the tenth electric capacity and the 11 electric capacity, and described the 11 electric capacity connects the second inductance, and described the second inductance connects respectively antenna and the 8th electric capacity, described the 8th electric capacity and described the tenth capacity earth.
8. a kind of wireless temperature control system according to claim 1, it is characterized in that, described 433MHZ receives tuned circuit and comprises: the 3rd inductance, digital signal after described the 3rd inductance accepts filter, described the 3rd inductance is connected with the 14 electric capacity with the 12 electric capacity respectively, described the 14 electric capacity connects respectively the 4th inductance and described 433MHZ demodulator circuit, transmits described 433MHZ digital signal to described 433MHZ demodulator circuit.
9. a kind of wireless temperature control system according to claim 1, it is characterized in that, described 433MHZ demodulator circuit comprises: demodulation chip, and the power supply input pin of described demodulation chip connects second source filter capacitor, the 3rd power filtering capacitor, the 5th inductance and 3.3V power supply; The earth terminal ground connection of described demodulation chip, the 3rd pin of described demodulation chip connects described 433MHZ digital signal, the enable pin of described demodulation chip is connected with the Enable Pin of described the second cpu control circuit, demodulation carrier frequency first vibration source of described demodulation chip and demodulation carrier frequency the second vibration source pin connect the second crystal oscillator, and demodulation digital signal out exports the digital signal input end of described the second cpu control circuit to through demodulated digital signal output terminal.
10. a kind of wireless temperature control system according to claim 1, it is characterized in that, described the second cpu control circuit comprises: second singlechip, the power supply termination 3.3V power supply of described second singlechip, the latch signal end of digital display circuit described in the latch signal termination of described second singlechip, the 3rd pin output temperature numeric coding of described second singlechip is to the data input pin of described digital display circuit; The clock signal terminal of digital display circuit described in the clock termination of described second singlechip, the digital signal input end of described second singlechip connects the digital signal after the demodulation of described 433MHZ demodulator circuit output, and the Enable Pin of described second singlechip is controlled the Enable Pin of described 433MHZ demodulator circuit.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320573182.2U CN203502852U (en) | 2013-09-13 | 2013-09-13 | Wireless temperature control system |
| CN201310421427.4A CN103455057B (en) | 2013-09-13 | 2013-09-13 | A kind of wireless temperature control system |
| DE201321000038 DE212013000038U1 (en) | 2013-09-13 | 2013-12-11 | A radio system for temperature control |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320573182.2U CN203502852U (en) | 2013-09-13 | 2013-09-13 | Wireless temperature control system |
| CN201310421427.4A CN103455057B (en) | 2013-09-13 | 2013-09-13 | A kind of wireless temperature control system |
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| Publication Number | Publication Date |
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| CN203502852U true CN203502852U (en) | 2014-03-26 |
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| CN201320573182.2U Withdrawn - After Issue CN203502852U (en) | 2013-09-13 | 2013-09-13 | Wireless temperature control system |
| CN201310421427.4A Active CN103455057B (en) | 2013-09-13 | 2013-09-13 | A kind of wireless temperature control system |
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| DE (1) | DE212013000038U1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103455057A (en) * | 2013-09-13 | 2013-12-18 | 天津市畅和科技有限公司 | Wireless temperature control system |
| WO2015035721A1 (en) * | 2013-09-13 | 2015-03-19 | 天津市畅和科技有限公司 | Wireless temperature control system |
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| CN203502852U (en) * | 2013-09-13 | 2014-03-26 | 天津市畅和科技有限公司 | Wireless temperature control system |
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- 2013-09-13 CN CN201320573182.2U patent/CN203502852U/en not_active Withdrawn - After Issue
- 2013-09-13 CN CN201310421427.4A patent/CN103455057B/en active Active
- 2013-12-11 DE DE201321000038 patent/DE212013000038U1/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103455057A (en) * | 2013-09-13 | 2013-12-18 | 天津市畅和科技有限公司 | Wireless temperature control system |
| WO2015035721A1 (en) * | 2013-09-13 | 2015-03-19 | 天津市畅和科技有限公司 | Wireless temperature control system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE212013000038U1 (en) | 2014-07-29 |
| CN103455057A (en) | 2013-12-18 |
| CN103455057B (en) | 2016-08-17 |
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