CN2476804Y - Temp. measuring apparatus with data transmission by telephone line - Google Patents

Abstract

The utility model relates to a temperature testing device, which employs telephone wire to transit data. Indoor end of a pair of telephone wires 1 is connected with the input end of a socket 2 and the output end of the socket 2 is connected with a dual-direction transferring end of a telephone wire interface circuit 3 and with the input end of a data communication circuit 4. All the circuit components are placed in a shell 7. The temperature testing circuit 6-1 consists of a resistance R9 and a temperature sensing resistance R10 which is fixed in a hole 8 inside the shell 7. The utility model achieves the remote and real time test of the temperature change in the tested area without a 220 V power supply or the power supplied by a battery, meanwhile the utility model has the advantages of simple structure, low production cost and convenient operation.

Description

Temperature Detector by telephone wire transmission data

The utility model belongs to online temperature detection instrument.

The existing indoor temperature that detects generally has the manual testing, off-line type electronic instrument for measuring temperature, three kinds of measures of industrial temperature TT﹠C system.And all there is different shortcoming and defect respectively in these three kinds of measures.One, manual testing, it needs personnel to carry out instantaneous test to tested scene, and this way can not be noted long temperature change situation in the test environment, and time-consuming.Though two, the off-line type electronic instrument for measuring temperature can be noted long-time temperature variations in the test environment, it can not realize that online in real time detects the long-distance transmissions of more can not networking.Three, the industrial temperature TT﹠C system exists equipment complexity, cost height, need 220V power supply or powered battery, operation easier is big, very difficult popularizes.

The purpose of this utility model is a kind of Temperature Detector by telephone wire transmission data of development, do not need this detecting device 220V power supply and powered battery just can realize the temperature variations of remote real-time detection measured point, and it also should have simple in structure, cost is low, convenience operation.

The utility model is made up of pair of telephone lines 1, socket 2, telephone line interface circuit 3, datel circuit 4, control circuit 5, temperature sensing circuit 6-1, housing 7.On input end A, the B that terminates at socket 2 that register one's residence of pair of telephone lines 1, on the transmitted in both directions end of the output C of socket 2, D termination telephone line interface circuit 3 and input end E, the F of datel circuit 4, interface circuit 3, datel circuit 4, control circuit 5, temperature sensing circuit 6-1 are fixed in the housing 7, have through hole 8 on the housing 7, temperature sensing circuit 6-1 is by resistance R ₉, thermo-sensitive resistor R ₁₀Form R ₉With R ₁₀Be connected in series, this series circuit is connected in parallel on power supply+V _CCAnd between the ground, R ₉With R ₁₀An input end of tie point connection control circuit 5, thermo-sensitive resistor R ₁₀Be fixed on through hole 8 places in the housing 7.

The utility model utilizes telephone wire can transmit detected temperature data, can transmit the instruction that send at the far distance controlled center again, and also for this detecting device provides continual working power, and this power supply is again the human body safety power supply.So the utility model not needing under 220V power supply and the battery powered situation have been realized, just can detect the temperature variations of measured point at a distance in real time, a plurality of measured points Centralized Monitoring of can realizing networking detects.The utility model can be used for the temperature detection in temperature detection, large greenhouse temperature detection and the unattended commercial production place of residential quarter heat supply, and it also has the advantage that one-piece construction is simple, cost is low, easy to operate.

Fig. 1 is the utility model one-piece construction synoptic diagram, and Fig. 2 is the A-A cut-open view of Fig. 1, and Fig. 3 is the electrical block diagram of embodiment one, and Fig. 4 is the electrical block diagram of embodiment two temperature sensing circuit 6-2 and control circuit 5.

Embodiment one: present embodiment is made up of pair of telephone lines 1, socket 2, telephone line interface circuit 3, datel circuit 4, control circuit 5, temperature sensing circuit 6-1, housing 7.On input end A, the B that terminates at socket 2 that register one's residence of pair of telephone lines 1, on the transmitted in both directions end of the output C of socket 2, D termination telephone line interface circuit 3 and input end E, the F of datel circuit 4, interface circuit 3, datel circuit 4, control circuit 5, temperature sensing circuit 6-1 are fixed in the housing 7, have through hole 8 on the housing 7, temperature sensing circuit 6-1 is by resistance R ₉, thermo-sensitive resistor R ₁₀Form R ₉With R ₁₀Be connected in series, this series circuit is connected in parallel on power supply+V _CCAnd between the ground, thermo-sensitive resistor R ₁₀Be fixed on through hole 8 places in the housing 7.Telephone line interface circuit 3 is made up of bridge rectifier circuit 9, bleeder circuit 10, voice modulation output circuit 11, off-hook decision circuitry 13, mu balanced circuit 12.Output terminal C, the D point of two input end combination hubs 2 of bridge rectifier circuit 9, two input ends of two output termination bleeder circuits 10 of bridge rectifier circuit 9.Bleeder circuit 10 is by resistance R ₁, voltage stabilizing diode D ₁Form R ₁The positive pole+E of a termination bridge rectifier circuit 9 output _CEnd, R ₁Another termination D ₁Positive pole, D ₁Minus earth, R ₁With D ₁Tie point be output terminal+V _CC, voice modulation output circuit 11 is by triode V ₁, resistance R ₅, R ₇Form V ₁Collector connect+E _C, V ₁Emitter through R ₅Ground connection, V ₁Base stage meet R ₇An end.Off-hook decision circuitry 13 is by triode V ₂, resistance R ₂, R ₆Form V ₂Collector through R ₂Connect+E _C, V ₂Grounded emitter, V ₂Base stage meet R ₆An end.Mu balanced circuit 12 is by triode V ₃, V ₄, resistance R ₃, R ₄, capacitor C ₁Form V ₄Emitter through R ₃Connect+E _C, R ₄Be connected on V ₄Emitter and base stage between, V ₄Collector connect+V _CC, C ₁Be connected on+V _CCAnd between the ground, V ₃Collector meet V ₄Base stage, V ₃Grounded emitter, V ₃Base stage meet V ₂ Collector.Datel circuit 4 is by photoelectrical coupler IC ₁, double-tone demoder IC frequently ₃, resistance R ₁₈, crystal oscillator T ₁Form IC ₁In light emitting diode D ₂The C point of anodal combination hub 2 output terminals, D ₂Negative pole combination hub 2 output terminal D points, IC ₁Middle V ₅Collector through R ₁₃Connect+V _CC, V ₅Grounded emitter.IC ₁Select models such as TLP621 for use.IC ₃Select models such as HT9200A for use, IC ₃Input end 1 pin meet R ₆The other end, IC ₃Output terminal 7 pin meet R ₇The other end, IC ₃Input end 6 pin meet V ₅Collector, IC ₃4 pin ground connection, IC ₃8 pin connect+V _CC, T ₁Be connected on IC ₃2 pin and 3 pin between.Control circuit 5 is by microcontroller IC ₂, resistance R ₈Form IC ₂Select models such as PIC12C67X for use, R ₈Be connected on IC ₂4 pin and 1 pin between, 1 pin meets power supply+V _CC, IC ₂Output terminal 3 pin meet IC ₃Input end 5 pin, IC ₂8 pin ground connection, IC ₂Input end 5 pin meet IC ₃Input end 6 pin, IC ₂Output terminal 2 pin meet IC ₃Input end 1 pin.The R of temperature sensing circuit 6 ₉With R ₁₀Contact meets IC ₂Input end 6 pin.Circuit of the present utility model is by the uninterrupted DC power supply that provides on the telephone wire, and the voltage on pair of telephone lines behind the phone off-hook of master control inspection center must change, and transmits the dialing tone signal of pulsation, and this variable signal is through IC ₁Just can detect and give the IC of control circuit 5 ₂Input end, IC then ₂Behind data processing and digital filtering, give double-tone demoder IC frequently with temperature sensing circuit 6 detected measured point temperature ₃, IC ₃Again with the V in the data send audio modification output circuit 11 ₁Base stage, through the modulation after telephone wire 1 passes to master control inspection center.

Embodiment two: the difference of present embodiment and embodiment one is the R at temperature sensing circuit 6-1 ₉With R ₁₀The two ends of series circuit again and be connected to by resistance R ₁₁With thermistor R ₁₂The circuit 6-2 of series connection.R ₁₂Be arranged on the outdoor of measured point, so that compare the actual temperature difference of indoor and outdoor.Other composition is identical with embodiment one with annexation.

Claims (6)

1, Temperature Detector by telephone wire transmission data, it is by pair of telephone lines (1), socket (2), telephone line interface circuit (3), datel circuit (4), control circuit (5), temperature sensing circuit (6-1), housing (7) is formed, it is characterized in that registering one's residence of pair of telephone lines (1) terminates at the input end A of socket (2), on the B, the output C of socket 2, the input end E of the transmitted in both directions end of D termination telephone line interface circuit (3) and datel circuit (4), on the F, interface circuit (3), datel circuit (4), control circuit (5), temperature sensing circuit (6-1) all is fixed in the housing (7), have through hole (8) on the housing (7), temperature sensing circuit (6-1) is by resistance R ₉, thermo-sensitive resistor R ₁₀Form R ₉With R ₁₀Be connected in series, this series circuit is connected in parallel on power supply+V _CCAnd between the ground, R ₉With R ₁₀An input end of tie point connection control circuit (5), thermo-sensitive resistor R ₁₀The through hole (8) that is fixed in the housing (7) is located.

2, the Temperature Detector by telephone wire transmission data according to claim 1 is characterized in that voice modulation output circuit (11) is by triode V ₁, resistance R ₅, R ₇Form V ₁Collector connect+E _C, V ₁Emitter through R ₅Ground connection, V ₁Base stage meet R ₇An end.

3, the Temperature Detector by telephone wire transmission data according to claim 1 is characterized in that off-hook decision circuitry (13) is by triode V ₂, resistance R ₂, R ₆Form V ₂Collector through R ₂Connect+E _C, V ₂Grounded emitter, V ₂Base stage meet R ₆An end.

4, the Temperature Detector by telephone wire transmission data according to claim 1 is characterized in that datel circuit (4) is by photoelectrical coupler IC ₁, double-tone demoder IC frequently ₃, resistance R ₁₃, crystal oscillator T ₁Form IC ₁In light emitting diode D ₂The C point of anodal combination hub (2) output terminal, D ₂Negative pole combination hub (2) output terminal D point, IC ₁Middle V ₅Collector through R ₁₃Connect+V _CC, V ₅Grounded emitter, IC ₃Input end 1 pin meet R ₆The other end, IC ₃Output terminal 7 pin meet R ₇The other end, IC ₃Input end 6 pin meet V ₅Collector, IC ₃4 pin ground connection, IC ₃8 pin connect+V _CC, T ₁Be connected on IC ₃2 pin and 3 pin between.

5, the Temperature Detector by telephone wire transmission data according to claim 1 is characterized in that control circuit (5) is by microcontroller IC ₂, resistance R ₈Form R ₈Be connected on IC ₂4 pin and 1 pin between, 1 pin meets power supply+V _CC, IC ₂Output terminal 3 pin meet IC ₃Input end 5 pin, IC ₂8 pin ground connection, IC ₂Input end 5 pin meet IC ₃Input end 6 pin, IC ₂Output terminal 2 pin meet IC ₃Input end 1 pin.

6, the Temperature Detector by telephone wire transmission data according to claim 1 is characterized in that the R at temperature sensing circuit (6-1) ₉With R ₁₀The two ends of series circuit again and be connected to resistance R ₁₁With thermistor R ₁₂The circuit (6-2) of series connection, R ₁₂Be arranged on the outdoor of measured point.

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