CN101127151A - Multi-passage full-automatic wireless thermodetector - Google Patents
Multi-passage full-automatic wireless thermodetector Download PDFInfo
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- CN101127151A CN101127151A CNA2006100409841A CN200610040984A CN101127151A CN 101127151 A CN101127151 A CN 101127151A CN A2006100409841 A CNA2006100409841 A CN A2006100409841A CN 200610040984 A CN200610040984 A CN 200610040984A CN 101127151 A CN101127151 A CN 101127151A
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Abstract
The utility model relates to multichannel full automatic wireless thermometer, which comprising a plurality of similar thermometric timing transmitters and a public display receiver. The thermometric timing transmitting circuit is provided with a time-setting control circuit, a temperature/voltage conversion circuit, a voltage/frequency conversion circuit and a modulated transmitting circuit. The receiving circuit consists of a receiving demodulator, a frequency/voltage conversion circuit, a temperature display circuit, a single frequency detection circuit and an overheat alarm circuit. Signals transmitted by the multichannel thermometric circuits can be received by a public receiver. The inconveniences of a wired temperature measurement and the influence brought by transmission lines to the temperature measurement can be solved. The correct overheat alarm and control can be achieved. The temperatures at various places can be measured automatically at a location, and is time and labor saving and the measurement is convenient.
Description
Technical field
The present invention relates to electronic measuring device and the wireless transmit and the receiving trap of temperature.Especially can full automatic wireless measurement to the multi-passage full-automatic wireless temp measuring system of strange land, many places temperature.Belong to the application of electronic technology field.
Background technology
At present, known electronic temperature measurement instrument is that temperature-sensitive head, electronic circuit and display are formed.Temperature-sensitive head is contacted with measured object, and temperature-sensitive head just is transformed into electric signal to the temperature amount that measures, and demonstrates corresponding temperature through the electronic circuit driving display then.Because temperature-sensitive head and display are corresponding one by one, it brings a lot of inconvenience for the many places thermometric.Also because of the wired connection of temperature-sensitive head and display, it brings difficulty for again the strange land thermometric.Also just say, only can not realize the temperature survey in strange land, many places by a present known electronic instrument for measuring temperature.
Summary of the invention
The invention discloses a kind of multi-passage full-automatic wireless thermodetector, it is made up of many identical thermometrics timing transmitter and public reception display machines.Every transmitter is in closed condition when not needing own thermometric emission.Arrived the thermometric of oneself and just opened automatically launch time, the temperature that oneself is measured is launched.Like this, the thermometric of every transmitter just can stagger launch time mutually.Thereby realized that a public receiver can receive the signal that multi-route measuring temperature was launched rice.What just receive in the different time is the signal that different transmitters sends.Thereby the staff just can measure the temperature in strange land, many places in a place.Circuit also is provided with the warning temperature warning function that glimmers automatically.Can in the time need reporting to the police, carry out controlling alarm correctly because of temperature over-range.
The technical scheme that the present invention takes is: in the shell of this controller circuit is set.Described circuit is made up of many identical thermometrics timing radiating circuit and public receiving circuits.
Thermometric regularly radiating circuit includes time set control circuit, temperature/voltage change-over circuit, voltage/frequency change-over circuit and modulation transmitter.The temperature/voltage change-over circuit converts the temperature signal that measures voltage signal to and sends the voltage/frequency change-over circuit to, converts corresponding frequency to by it.Send modulation transmitter then to and remove modulated carrier, and be transmitted into aerial.The work that the time set control circuit is used for controlling whole radiating circuit according to the predefined time whether.See shown in Figure 1.
Single-chip microcomputer IC1, electronic keyboard SB1-7 and triode VT1 etc. constitute the time set control circuit.Dry cell E1 provides 1.5V direct supply for single-chip microcomputer IC1.The negative pole end of E1 is as ground, the positive pole of anodal termination IC1.The negative pole end of 9V laminated cell E2 is connected with the positive pole of E1, and the collector of the anodal termination transistor VT1 of E2 provides the direct supply of 10.5V for whole transmitter by the emitter of VT1.The base stage of VT1 connects the output terminal of IC1 through resistance R 1.Low-power scm IC1, model is 4EC8700.It only handles the data relevant with the time, and it can export high and low level according to predefined time-program(me).Remove to drive the saturated of VT1 and end.Thereby whether control whole radiating circuit work.Arrive the thermometric time at first, it exports high level, and VT1 saturation conduction, radiating circuit get electric and start working.The temperature that measures is sent.To the time that the thermometric time finishes, single-chip microcomputer is output low level again, and VT1 ends, and radiating circuit cuts off the power supply and quits work.If many transmitter thermometrics are set and should be staggered for thermometric section launch time of every transmitter mutually.
The model of integrated regulator IC3 is W7805.It provides 5 volts of stabilized voltage supplys for integrated temperature sensor LM45C.1 pin of IC3 connects the emitter of VT1,2 pin ground connection, and 3 pin connect with 1 of LM45C and but are connected.The positive pole of filter capacitor C2 connects 3 pin of IC3, minus earth.Integrated temperature sensor LM45C, amplifier integrated circuit (IC) 2 and resistance R 2, R3, R4, R6 constitute the temperature/voltage change-over circuit.The 3 pin ground connection of LM45C, 2 pin are connected with the in-phase input end of IC2 through resistance R 2.Amplifier integrated circuit (IC) 2, model are CA3140.Its inverting input is through resistance R 4 ground connection, and output terminal is connected with 9 pin of integrated circuit (IC) 4.The in-phase input end of one termination IC2 of resistance R 3, other end ground connection.The output terminal of the termination IC2 of adjustable resistance R6, the inverting input of another termination IC2.Integrated temperature sensor LM45C becomes corresponding voltage signal to the temperature transition that measures.Its output voltage is added to 9 pin of integrated circuit (IC) 4 after IC2 suitably amplifies.
Integrated circuit (IC) 4, resistance R 8 and capacitor C 3 constitute the voltage/frequency change-over circuit.The model of IC4 is CD4046.Its 16 pin connect the emitter of VT1, and 5 pin and 8 pin are ground connection all, and 11 pin are through resistance R 8 ground connection.Its output terminal 4 pin are connected through the input end of resistance R 7 with wireless transmit special module IC5.6 pin of one termination IC4 of capacitor C 3,7 pin of another termination IC4.Here " voltage/frequency change-over circuit " is a voltage controlled oscillator in fact.Its output frequency and its input voltage are linear.When the 9 pin input voltages of IC4 were zero, its output frequency also was zero.Therefore, the temperature height that measures of temperature sensor LM45C can be reflected by the frequency of voltage controlled oscillator.
Modulation transmitter 1C5 is the wireless transmit special module.Its model is TWH630.Its positive pole connects the emitter of VT1, minus earth.Input end is connected with 4 pin of IC4 through resistance R 7.The square-wave pulse of 4 pin of IC4 output is delivered to 1C5 and is carried out pulsed modulation after resistance R 7 current limlitings, again by the frequency electromagnetic waves of IC5 built-in aerial radiation 265MHz in the air.
The time-program(me) of 4EC8700 single-chip microcomputer IC1 writes and writes fashionable demonstration and finishes by electronic keyboard SB1-7 and LCDs LCD.Electronic keyboard SB1-7 with see being connected of each pin of single-chip microcomputer shown in Fig. 2 (b).The M of single-chip microcomputer
1Pin respectively with P
2-P
4The pin key connects, and realizes that " control is selected " reaches " regularly ", " during the school ".M
2Pin respectively with P
1-P
4The pin key connects, realize " resetting " reach " branch ", " time ", " week ".(1) time adjustment: under the normal condition, LCDs LCD shows is state when normally walking.Pin " during the school " key, simultaneously respectively by " week " key, adjustment week; By " time " key, adjustment hour; By " branch " key, the adjustment branch.(2) regularly adjustment: by 1 " regularly " key, LCDs LCD begins the Displaying timer state.At this moment can set each thermometric start time " ON " and the concluding time " OFF " of every transmitter every day.Press continuously " time " key, during adjustment; Press " branch " key, adjustment branch continuously.After the start time " 10N " of intact the 1st thermometric of adjustment, press once " regularly " key again, according to the concluding time " 10FF " of the identical method adjustment thermometric first time.Successively again by " regularly " key, the start time and the concluding time of the 2nd thermometric of adjustment every day respectively, the start time of the 3rd thermometric and concluding time or the like.When in 9 time periods during only with the period of youngster wherein, all the other are pressed " resetting " key they are freezed.Press " week " key, adjustment control forms weekly continuously.For example, when LCDs demonstrates one, two, three, four, five, five printed words, represent to have only Monday to Friday in the week, five heaven-made timing controlled are not made timing controlled on Saturday and Sun..After adjustment finishes, click " during the school " key, state when display screen recovers to show to walk normally.By " control select " key, can be the automatic control transformation of press setting-up time immediately manual control.
Receiving circuit includes receiving demodulation circuit, frequency/voltage change-over circuit, temperature display circuit and unifrequency testing circuit, warning temperature alarm circuit.Receiving demodulation circuit is after the signal demodulation that receives, and one the tunnel sends " frequency/voltage change-over circuit " to, and another road sends " unifrequency testing circuit " to.The frequency/voltage change-over circuit becomes corresponding voltage to frequency inverted, and then sends display circuit to.Display circuit demonstrates corresponding temperature according to different voltage.The unifrequency testing circuit detects the signal frequency of sending into when consistent with its VCO frequency, just transmits signal to warning circuit.Warning circuit is started working, and sends alerting signal.The temperature that the VCO frequency of unifrequency testing circuit can be reported to the police as required preestablishes.See shown in Figure 3.
Transformer T, diode D1～D4, capacitor C 12～C15 and integrated regulator IC11 form 12 volts of DC-stabilized circuit.12 volts of direct supplys are provided for whole receiving circuit.The AC power that the elementary termination of transformer T is 220 volts.Diode D1～D4 forms bridge rectifier circuit, the out secondary of two input termination transformers of bridge rectifier circuit.The cathode output end of bridge rectifier circuit is as ground, and 1 pin of cathode output end and integrated regulator IC11 joins.The 2 pin ground connection of IC11, output terminal 3 pin provide 12 volts of DC voltage; The model of IC11 is W7812.Capacitor C 12～C15 strobes.The positive pole of C15 connects 1 pin of IC11, minus earth; 1 pin of the termination IC11 of C14,2 pin of another termination IC11; 2 pin of the termination IC11 of C13,3 pin of another termination IC11; The positive pole of C12 connects 3 pin of IC1, minus earth.
Receiving demodulation circuit IC6 is and the corresponding wireless receiving special module of IC5.Its model is TWH631.3 pin of its anodal termination IC11, negative pole end ground connection.After IC6 receives the radiofrequency signal that IC5 sends, the square-wave pulse after its output terminal output demodulation.One the tunnel sends into 1 pin of integrated circuit (IC) 7 through capacitor C 4, resistance R 11; 3 pin of integrated circuit (IC) 9 are sent on another road through capacitor C 7.
Integrated gate circuit IC7, its model is CC4011.The 4 μ S trigger generators that it and capacitor C 5, resistance R 12 etc. constitute.Resistance R 9, R10 are the biasing resistors of input end, and the voltage that makes input end is 1/2 of supply voltage.3 pin of one termination IC11 of resistance R 9, the end of other end connecting resistance R10; The other end ground connection of R10.The output terminal of one termination IC6 of capacitor C 4, the junction of another termination R9 and R10.One termination R9 of resistance R 11 and R10 connect place, 1 pin of another termination IC7.2 pin of IC7,5 pin, 10 pin, 13 pin and 14 pin all connect 3 pin of IC11, and 3 pin are connected with 4 pin, and 8 pin link to each other with 12 pin, and 6 pin connect capacitor C 5, another termination 9 pin of C5.9 pin of one termination IC7 of resistance R 12, other end ground connection.The end of the 9 pin connecting resistance R13 of IC7, the base stage of another termination transistor VT3 of R13.The grounded emitter of VT3, collector connect 3 pin of IC11 through resistance R 14.Square-wave pulse after the demodulation is input to 1 pin of IC7 through C4, R11, through the 4 μ S trigger generator shapings that are made of IC7 etc., by the trigger pulse of the collector output same frequency of VT3.
Integrated circuit (IC) 8, its model are NE555.It and capacitor C 6, resistance R 17 and R15, R16 etc. constitute the frequency/voltage change-over circuit.The 1 pin ground connection of IC8,4 pin and 8 pin all connect 3 pin of IC11, and input end 2 pin connect the collector of VT3.3 pin of one termination IC11 of resistance R 17, an end of another termination capacitor C 6; The other end ground connection of C6.6 pin of IC8 and 8 pin all join the end of output terminal 3 pin connecting resistance R15 with the junction of R17 and C6.The end of another termination variable resistor R16 of R15, the other end ground connection of R16.One end of the slip termination capacitor C 16 of R16, the other end ground connection of C16.When each new circulation of input signal arrived, just the monostalbe trigger that is made of IC8 etc. of triggering was once for 4 μ S trigger generators of formation such as IC7.The output pulse of IC8 changes DC voltage into by R15, R16 and capacitor C 16.Regulate R17 or C6 and can change pulse width.If the square-wave pulse peak value of IC8 output is V
p, pulse width is T
wThe DC voltage that then can calculate its output is V
pT
wF.F is a pulsed frequency in the formula.Because V
pAnd T
wFix, so this voltage is directly proportional with frequency.Therefore, gauge outfit can directly demonstrate corresponding temperature.
Finished product digital watch, voltage stabilizing diode D and resistance R 18, R19 constitute temperature display circuit.The sliding end of the input termination R16 of digital watch, 3 pin of anodal termination IC11, negative pole end ground connection, the sliding end of school zero termination R18.The plus earth of D, negative pole is connected with R19 one end; 3 pin of another termination IC11 of R19.The termination R19 of R18 and the junction of D, other end ground connection.Regulating R18 can be to gauge outfit school zero.
Integrated circuit (IC) 9, its model are LM567.It and capacitor C 8, resistance R 20 and R21 etc. constitute the unifrequency testing circuit.4 pin of IC9 connect 3 pin of IC11,7 pin ground connection, and 1 pin connects the positive pole of capacitor C 9, and 2 pin connect the positive pole of capacitor C 10, and the negative pole of C9 and C10 is ground connection all.The end of the 5 pin connecting resistance R20 of 1C9,6 pin connect the other end of R20.6 pin of one termination IC9 of capacitor C 8, other end ground connection.8 pin of IC9 connect the end of R21,3 pin of another termination IC11 of R21.3 pin of IC9 connect an end of capacitor C 7, the output terminal of another termination IC6 of C7.When 1C6 is sent to the VCO frequency of square-wave signal frequency and IC9 of 3 pin of IC9 when consistent through capacitor C 7.The IC9 reliable decoding, its 8 pin transfers output low level to by high level.Flow to 7 pin of IC10.Regulate R20 or C8 and can change the VCO frequency.
Integrated circuit (IC) 10, its model are M5232L.It and capacitor C 11, light emitting diode ED and piezoelectric buzzer HTD etc. constitute the flicker warning circuit.8 pin of IC10 connect 3 pin of IC11,4 pin ground connection, and 7 pin connect 8 pin of IC9, and 5 pin connect the positive pole of capacitor C 11, the minus earth of C11.1 pin of one termination IC10 of resistance R 22,3 pin of another termination IC10.The positive pole of light emitting diode ED connects 3 pin of IC10, other end ground connection.6 pin of the termination IC10 of piezoelectric buzzer HTD, 1 pin of another termination IC10.4 volts of stable voltages of 1 pin output of IC10.When the input voltage of 7 pin of IC10 was lower than its internal reference voltage, 6 pin output low levels drove HTD and send chimes of doom.Simultaneously, the internal oscillator starting oscillation of IC10, it is luminous to drive the ED flicker by 3 pin.
The invention has the beneficial effects as follows, overcome all inconvenience of wired thermometric and the influence that transfer wire brings to temperature survey.And can in the time need reporting to the police, carry out controlling alarm correctly because of temperature over-range.The staff just can measure the temperature in strange land, many places in a place.Time saving and energy saving, it is convenient to measure.
Description of drawings
Fig. 1 is a regularly transmitter circuitry schematic diagram of thermometric of the present invention.
Fig. 2 is the guidance panel figure of thermometric timing transmitter and the catenation principle figure between single-chip microcomputer IC1 and the electronic keyboard SB1-7.Wherein, figure (a) is the regularly guidance panel figure of transmitter of thermometric, and figure (b) is the catenation principle figure between single-chip microcomputer and the electronic keyboard.
Fig. 3 is reception display machines circuit theory diagrams of the present invention.
Among Fig. 1: E1 is 1.5 volts of dry cells, and E2 is 9 volts of laminated cells.LCD is a LCD, and B is a quartz (controlled) oscillator, and SB1-7J is an electronic keyboard.IC1 is a single-chip microcomputer, and VT1 is a transistor, and LM45C is a temperature sensor, and IC3 is an integrated regulator, and IC2 is the amplifier integrated circuit, and IC4J is the CMOS integrated circuit, and IC5 is the wireless transmit special module.C1～C3 is an electric capacity, and R1～R8 is a resistance.
Among Fig. 3: IC6 is the wireless receiving special module, and IC7 is an integrated gate circuit, and IC8 is an integrated circuit, and IC9 is that integrated circuit (IC) 10 is integrated circuit, and IC11 is an integrated regulator.VT3 is a transistor, and HTD is a piezoelectric buzzer, and ED is a light emitting diode, and D is the voltage stabilizing crystal diode, and D1～D4 is a commutation diode, and T is a transformer, and C4～C16 is an electric capacity, and R9～R22 is a resistance.
Embodiment
Circuit shown in Figure 1 is set in transmitter house.In Fig. 1, dry cell E1 provides 1.5V direct supply for single-chip microcomputer IC1.The negative pole end of E1 is as ground, the positive pole of anodal termination IC1.The negative pole end of 9V laminated cell E2 is connected with the positive pole of E1, and the collector of the anodal termination transistor VT1 of E2 provides the direct supply of 10.5V for whole transmitter by the emitter of VT1.The base stage of VT1 connects the output terminal of IC1 through resistance R 1.1 pin of 1C3 connects the emitter of VT1,2 pin ground connection, and 3 pin connect with 1 of LM45C and but are connected.The positive pole of filter capacitor C2 connects 3 pin of IC3, minus earth.The 3 pin ground connection of LM45C, 2 pin are connected with the in-phase input end of IC2 through resistance R 2.The inverting input of IC2 is through resistance R 4 ground connection, and output terminal is connected with 9 pin of integrated circuit (IC) 4.The in-phase input end of one termination IC2 of resistance R 3, other end ground connection.The output terminal of the termination IC2 of adjustable resistance R6, the inverting input of another termination IC2.16 pin of IC4 connect the emitter of VT1, and 5 pin and 8 pin are ground connection all, and 11 pin are through resistance R 8 ground connection.Its output terminal 4 pin are connected through the input end of resistance R 7 with wireless transmit special module IC5.6 pin of the termination IC4 of capacitor C3,7 pin of another termination IC4.The positive pole of IC5 connects the emitter of VT1, minus earth.Input end is connected with 4 pin of IC4 through resistance R 7.
In being connected of the single-chip microcomputer IC1 shown in Fig. 2 (b) and electronic keyboard SB1-7, the M1 pin of a termination IC1 of " control is selected " button, another termination P2 pin." regularly " the M1 pin of a termination IC1 of button, another termination P3 pin.The M1 pin of the one termination IC1 of " during the school " button, another termination P4 pin." reset " the M2 pin of a termination IC1 of button, another termination P1 pin.The M2 pin of the one termination IC1 of " branch " button, another termination P2 pin." time " the M2 pin of a termination IC1 of button, another termination P3 pin.The M2 pin of the one termination IC1 of " week " button, another termination P4 pin.The button of each button stretches out outer surface of outer cover, so that set thermometric section launch time of transmitter.The position of the arrangement of each button and LCD LCD is seen shown in Fig. 2 (a).
Circuit shown in Figure 3 is set in the receiver shell.In Fig. 3, the AC power that the elementary termination of transformer T is 220 volts.Diode D1～D4 forms bridge rectifier circuit, the out secondary of two input termination transformers of bridge rectifier circuit.The cathode output end of bridge rectifier circuit is as ground, and 1 pin of cathode output end and integrated regulator IC11 joins.The 2 pin ground connection of IC11, output terminal 3 pin provide 12 volts of DC voltage.The positive pole of C15 connects 1 pin of IC11, minus earth; 1 pin of the termination IC11 of C14,2 pin of another termination IC11; 2 pin of the termination IC11 of C13,3 pin of another termination IC11; The positive pole of C12 connects 3 pin of IC1, minus earth.3 pin of the anodal termination IC11 of IC6, negative pole end ground connection.3 pin of the termination IC11 of R9, the end of another termination R10; The other end ground connection of R10.The output terminal of the termination IC6 of C4, the junction of another termination R9 and R10.The termination R9 of R11 and R10 connect place, 1 pin of another termination IC7.2 pin of IC7,5 pin, 10 pin, 13 pin and 14 pin all connect 3 pin of IC11, and 3 pin are connected with 4 pin, and 8 pin link to each other with 12 pin, and 6 pin meet C5, another termination 9 pin of C5.9 pin of the termination IC7 of R12, other end ground connection.9 pin of 1C7 connect the end of R13, the base stage of another termination VT3 of R13.The grounded emitter of VT3, collector connect 3 pin of IC11 through R14.The 1 pin ground connection of IC8,4 pin and 8 pin all connect 3 pin of IC11, and 2 pin connect the collector of VT3.3 pin of the termination IC11 of R17, the end of another termination C6; The other end ground connection of C6.6 pin of IC8 and 8 pin all join with the junction of R17 and C6, and 3 pin connect the ground end of R15.The end of another termination R16 of R15, the other end ground connection of R16.The end of the slip termination C16 of R16, the other end ground connection of C16.The sliding end of the input termination R16 of digital watch, 3 pin of anodal termination IC11, negative pole end ground connection, the sliding end of school zero termination R18.The plus earth of D, negative pole is connected with R19 one end; 3 pin of another termination IC11 of R19.The termination R19 of R18 and the junction of D, other end ground connection.4 pin of IC9 connect the pin of IC11,7 pin ground connection, and 1 pin connects the positive pole of C9, and 2 pin connect the positive pole of C10, and the negative pole of C9 and C10 is ground connection all.5 pin of IC9 connect the end of R20, and 6 pin connect the other end of R20.6 pin of one termination IC9 of capacitor C 8, other end ground connection.3 pin of IC9 connect an end of capacitor C 7, the output terminal of another termination IC6 of C7.8 pin of IC9 connect the end of R21,3 pin of another termination IC11 of R21.8 pin of IC10 connect 3 pin of IC11,4 pin ground connection, and 7 pin connect 8 pin of IC9, and 5 pin connect the positive pole of C11, the minus earth of C11.1 pin of the termination IC10 of R22,3 pin of another termination IC10.The positive pole of ED connects 3 pin of IC10, other end ground connection.6 pin of the termination IC10 of HTD, 1 pin of another termination IC10.The display of digital watch is close on the panel of receiver, the displays temperature reading.Light emitting diode ED also will reveal on panel.
Claims (6)
1. multi-passage full-automatic wireless thermodetector, in the shell of this temperature measurer, circuit is set, it is characterized in that: it is made up of many identical thermometrics timing transmitter and public receivers, described thermometric regularly radiating circuit includes time set control circuit, temperature/voltage change-over circuit, voltage/frequency change-over circuit, and described receiving circuit includes frequency/voltage change-over circuit and warning temperature alarm circuit.
2. multi-passage full-automatic wireless thermodetector according to claim 1, it is characterized in that: the output terminal of 4EC8700 single-chip microcomputer IC1 connects the base stage of transistor VT1 through resistance R 1, the collector of VT1 connects the 10.5V power supply, again by the emission of VT1 integrated circuit 1C4 and the modulation transmitter special module IC5 time set control circuit that provides direct supply to constitute very.
3. multi-passage full-automatic wireless thermodetector according to claim 1, it is characterized in that: the output terminal of integrated temperature sensor LM45C connects the in-phase input end of amplifier ic chip 2 through resistance R 2, the temperature/voltage change-over circuit that is made of with measuring the corresponding voltage of temperature the output terminal output of IC2.
4. multi-passage full-automatic wireless thermodetector according to claim 1, it is characterized in that: 9 pin of integrated circuit (IC) 4 connect the output terminal of IC2,6 pin of one termination IC4 of capacitor C 3,7 pin of another termination IC4,11 pin are through resistance R 8 ground connection, the voltage/frequency change-over circuit that 4 pin are connected to form through the input end of resistance R 7 and wireless transmit special module IC5.
5. multi-passage full-automatic wireless thermodetector according to claim 1, it is characterized in that: 2 pin of NE555 integrated circuit (IC) 8 connect the collector of transistor VT3,6,7 pin of one termination IC8 of capacitor C 6, the other end ground connection of C6, the end of the 3 pin connecting resistance R15 of IC8, the end of another termination variable resistor R16 of R15, the other end ground connection of R16, one end of the slip termination capacitor C 16 of R16, the other end ground connection of C16, the frequency/voltage change-over circuit that the sliding end of R16 constitutes as output terminal.
6. multi-passage full-automatic wireless thermodetector according to claim 1, it is characterized in that: the minus earth of light emitting diode ED, 3 pin that positive pole connects M5232L integrated circuit (IC) 10 connect, 1 pin of piezoelectric buzzer HTD one termination integrated circuit (IC) 10,6 pin of another termination IC10 and the flicker warning circuit that constitutes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100409841A CN101127151A (en) | 2006-08-18 | 2006-08-18 | Multi-passage full-automatic wireless thermodetector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100409841A CN101127151A (en) | 2006-08-18 | 2006-08-18 | Multi-passage full-automatic wireless thermodetector |
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| CN101127151A true CN101127151A (en) | 2008-02-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280082A (en) * | 2013-04-28 | 2013-09-04 | 苏州市职业大学 | Wireless temperature measurement system |
-
2006
- 2006-08-18 CN CNA2006100409841A patent/CN101127151A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280082A (en) * | 2013-04-28 | 2013-09-04 | 苏州市职业大学 | Wireless temperature measurement system |
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