CN205176132U - Infrared circuit of absorption formula and metering device who makes with this circuit - Google Patents
Infrared circuit of absorption formula and metering device who makes with this circuit Download PDFInfo
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- CN205176132U CN205176132U CN201521029255.7U CN201521029255U CN205176132U CN 205176132 U CN205176132 U CN 205176132U CN 201521029255 U CN201521029255 U CN 201521029255U CN 205176132 U CN205176132 U CN 205176132U
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Abstract
The utility model discloses an infrared circuit of absorption formula and metering device who makes with this circuit. The infrared circuit of absorption formula is including absorption infrared receiving tube incoming signal detection circuitry, comparator detection circuitry, controller and the absorption infrared transmitting tubes output circuit who establishes ties in proper order, adsorb the signal that infrared receiving tube incoming signal detection circuitry detected infrared receiving tube to carry out the comparison with signal input to comparator detection circuitry and standard level signal, the comparator detects resistance and inputs the controller with the signal comparison result, and controller control is adsorbed infrared transmitting tubes output circuit and is passed through the external emissiion data of infrared mode, the utility model also provides an include the metering device of the infrared circuit of absorption formula. The utility model discloses because adopt novel circuit design, detection circuitry and clamp circuit are put to the fortune of having got rid of prior art, circuit low cost, circuit complexity obviously reduces, and the working speed is higher, and the communication is reliable and stable, use the electric energy meter of the infrared circuit of absorption formula, low cost, communication speed is high.
Description
Technical field
The measuring instrument that the utility model is specifically related to the infrared circuit of a kind of absorption type and makes with this circuit.
Background technology
Along with the development of national economy technology, electric energy has become one of indispensable energy in people's life.Electric energy meter, as the table meter of metering electric energy, plays an important role in electric system.
At present, electronic electric energy meter has become the main flow of energy measurement instruments on market.The absorption type infrared communication of electronic electric energy meter have with low cost, be simple and easy to, transmission quantity large, transfer rate high.
Application number is the infrared circuit of the absorption type for electronic electric energy meter of 201220152280.4, and its transfer rate reaches 19200bps; But the infrared circuit of this absorption type needs to use the circuit such as operational amplifier, comparer, clamp circuit, and it is with high costs, circuit is complicated; Although communication speed reaches 19200bps, communication speed is still relatively low.
Summary of the invention
One of the purpose of this utility model is to provide a kind of absorption type with low cost, that communication speed is high infrared circuit.
Two of the purpose of this utility model is to provide a kind of measuring instrument utilizing the infrared circuit of described absorption type to make.
The infrared circuit of this absorption type that the utility model provides, comprises absorption infrared receiving tube circuit for checking input signals, comparer testing circuit, controller and the absorption infrared transmitting tube output circuit of connecting successively; Absorption infrared receiving tube circuit for checking input signals is for detecting the level signal of infrared receiving tube, and the level signal of infrared receiving tube is input to comparer testing circuit, comparer testing circuit is for the height of the level signal and fiduciary level signal that detect infrared receiving tube, and detection signal result is input to controller, controller controls absorption infrared transmitting tube output circuit by the external transmitting data of infrared mode.
Described comparer testing circuit comprises the comparer that model is LM239.
Described absorption infrared receiving tube circuit for checking input signals is for comprising infrared receiving tube and pull-up resistor, and infrared receiving tube and pull-up resistor are serially connected between VDD-to-VSS.
Described comparer testing circuit comprises comparer, filter capacitor, the first divider resistance, the second divider resistance and exports pull-up resistor; The positive pole of comparer is connected between infrared receiving tube and pull-up resistor; The negative pole of comparer is connected between the first divider resistance and the second divider resistance, and the negative pole of comparer is also by filter capacitor ground connection; The output terminal of comparer is connected with power supply by exporting pull-up resistor, and the output terminal of comparer is connected with the input/output end port of controller simultaneously; First divider resistance and the second divider resistance are connected between VDD-to-VSS.
Described controller is single-chip microcomputer, DSP or FPGA.
Described absorption infrared transmitting tube output circuit comprises base stage current-limiting resistance, base pull-up resistor, triode, output current limiting resistance and infrared transmitting tube; The input/output end port of controller is connected with the base stage of triode by base stage current-limiting resistance; The base stage of triode is connected with power supply by base pull-up resistor, and the emitter of triode is directly connected with power supply, and the receiver of triode is connected to ground by output current limiting resistance and infrared transmitting tube successively; Controller controls turning on and off of triode by the level signal of input/output end port, thus controls conducting and the shutoff of infrared transmitting tube, is reached through the object that infrared transmitting tube externally sends data.
A kind of measuring instrument, comprises the infrared circuit of described absorption type, and the infrared circuit of absorption type described in measuring instrument utilizes carries out data communication.
The infrared circuit of this absorption type that the utility model provides, owing to adopting novel circuit design, eliminate operational amplifier testing circuit of the prior art and clamping circuit, circuit cost is cheap, and circuit complexity obviously reduces; Simultaneously owing to eliminating operational amplifier testing circuit and clamping circuit, the operating rate of circuit is better, the infrared circuit of this absorption type of the present utility model, and most high energy ensures the communication speed of 38400bps, and communication robust is reliable.Apply the electric energy meter that the infrared circuit of described absorption type is made, owing to have employed the infrared circuit of absorption type of the present utility model, electric energy meter is with low cost, and communication speed is high.
Accompanying drawing explanation
Fig. 1 is functional block diagram of the present utility model.
Fig. 2 is the absorption infrared receiving tube circuit for checking input signals of a kind of embodiment of the present utility model and the circuit theory diagrams of comparer testing circuit.
Fig. 3 is the circuit theory diagrams of the absorption infrared transmitting tube output circuit of a kind of embodiment of the present utility model.
Embodiment
Be illustrated in figure 1 functional block diagram of the present utility model: the infrared circuit of this absorption type that the utility model provides, comprise absorption infrared receiving tube circuit for checking input signals, comparer testing circuit, controller and the absorption infrared transmitting tube output circuit of connecting successively; Absorption infrared receiving tube circuit for checking input signals is for detecting the level signal of infrared receiving tube, and the level signal of infrared receiving tube is input to comparer testing circuit, comparer testing circuit is for the height of the level signal and fiduciary level signal that detect infrared receiving tube, and detection signal result is input to controller, controller controls absorption infrared transmitting tube output circuit by the external transmitting data of infrared mode.
Be illustrated in figure 2 the absorption infrared receiving tube circuit for checking input signals of a kind of embodiment of the present utility model and the circuit theory diagrams of comparer testing circuit: absorption infrared receiving tube circuit for checking input signals comprises infrared receiving tube (indicating DR1 in figure) and pull-up resistor (indicating R4 in figure); Infrared receiving tube and pull-up resistor are connected between positive source (indicating V3P3A in figure) and ground; Comparer testing circuit comprises comparer (indicating LM239A in figure), the first divider resistance (indicating R6 in figure), the second divider resistance (indicating R5 in figure), exports pull-up resistor (indicating R7 in figure) and filter capacitor (indicating C11 in figure) composition; The positive pole of comparer is connected between infrared receiving tube and pull-up resistor; The negative pole of comparer is connected between the first divider resistance and the second divider resistance, and the negative pole of comparer also have passed filter capacitor ground connection simultaneously; The output terminal of comparer is connected with positive source by exporting pull-up resistor, and the output terminal of comparer is connected with the I/O mouth of controller simultaneously; The negative pole input voltage (also referred to as reference voltage) of comparer is adjusted by the resistance adjusting the first divider resistance and the second divider resistance, infrared receiving tube is for receiving infrared signal, thus change the positive signal level of comparer, comparer by comparing the height of positive pole level signal and negative pole level signal, thus by the I/O mouth of the signal transmission of infrared receiving tube to controller.Controller can adopt single-chip microcomputer, DSP or FPGA.
Be illustrated in figure 3 the circuit theory diagrams of the absorption infrared transmitting tube output circuit of a kind of embodiment of the present utility model: infrared transmitting tube output circuit comprises base stage current-limiting resistance (indicating R9 in figure), base pull-up resistor (indicating R11 in figure), triode (indicating Q2 in figure) current-limiting resistance (indicating R10 and R12 in figure) and infrared transmitting tube (indicating DT1 in figure); The I/O mouth of controller passes through the base stage of base stage current-limiting resistance connecting triode, and the base stage of triode is also connected with positive source (indicating V3P3A in figure) by base pull-up resistor; The emitter of triode is directly connected with positive source; The collector of triode is connected to ground by current-limiting resistance and infrared transmitting tube; Controller controls turning on and off of triode by the level signal of control I/O mouth, thus controls conducting and the shutoff of infrared transmitting tube, is reached through the object that infrared transmitting tube externally sends data.
The utility model also provides a kind of measuring instrument, and the infrared circuit of absorption type described in this measuring instrument utilizes carries out communication.
Claims (7)
1. the infrared circuit of absorption type, comprises absorption infrared receiving tube circuit for checking input signals, comparer testing circuit, controller and absorption infrared transmitting tube output circuit; It is characterized in that absorption infrared receiving tube circuit for checking input signals, comparer testing circuit, controller and absorption infrared transmitting tube output circuit are connected successively; Absorption infrared receiving tube circuit for checking input signals is for detecting the level signal of infrared receiving tube, and the level signal of infrared receiving tube is input to comparer testing circuit, comparer testing circuit is for the height of the level signal and fiduciary level signal that detect infrared receiving tube, and detection signal result is input to controller, controller controls absorption infrared transmitting tube output circuit by the external transmitting data of infrared mode.
2. the infrared circuit of absorption type according to claim 1, is characterized in that described comparer testing circuit comprises the comparer that model is LM239.
3. the infrared circuit of absorption type according to claim 1 and 2, it is characterized in that described absorption infrared receiving tube circuit for checking input signals is for comprising infrared receiving tube and pull-up resistor, infrared receiving tube and pull-up resistor are serially connected between VDD-to-VSS.
4. the infrared circuit of absorption type according to claim 1 and 2, is characterized in that described comparer testing circuit comprises comparer, filter capacitor, the first divider resistance, the second divider resistance and exports pull-up resistor; The positive pole of comparer is connected between infrared receiving tube and pull-up resistor; The negative pole of comparer is connected between the first divider resistance and the second divider resistance, and the negative pole of comparer is also by filter capacitor ground connection; The output terminal of comparer is connected with power supply by exporting pull-up resistor, and the output terminal of comparer is connected with the input/output end port of controller simultaneously; First divider resistance and the second divider resistance are connected between VDD-to-VSS.
5. the infrared circuit of absorption type according to claim 1 and 2, is characterized in that described controller is single-chip microcomputer, DSP or FPGA.
6. the infrared circuit of absorption type according to claim 1 and 2, is characterized in that described absorption infrared transmitting tube output circuit comprises base stage current-limiting resistance, base pull-up resistor, triode, output current limiting resistance and infrared transmitting tube; The input/output end port of controller is connected with the base stage of triode by base stage current-limiting resistance; The base stage of triode is connected with power supply by base pull-up resistor, and the emitter of triode is directly connected with power supply, and the receiver of triode is connected to ground by output current limiting resistance and infrared transmitting tube successively; Controller controls turning on and off of triode by the level signal of input/output end port, thus controls conducting and the shutoff of infrared transmitting tube, is reached through the object that infrared transmitting tube externally sends data.
7. a measuring instrument, is characterized in that the infrared circuit of absorption type comprised described in claim 1 ~ 6, and the infrared circuit of absorption type described in measuring instrument utilizes carries out data communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521029255.7U CN205176132U (en) | 2015-12-14 | 2015-12-14 | Infrared circuit of absorption formula and metering device who makes with this circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521029255.7U CN205176132U (en) | 2015-12-14 | 2015-12-14 | Infrared circuit of absorption formula and metering device who makes with this circuit |
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| Publication Number | Publication Date |
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| CN205176132U true CN205176132U (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521029255.7U Active CN205176132U (en) | 2015-12-14 | 2015-12-14 | Infrared circuit of absorption formula and metering device who makes with this circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112104419A (en) * | 2020-04-29 | 2020-12-18 | 杭州绿鲸科技有限公司 | Comparison filtering infrared communication circuit and implementation method |
-
2015
- 2015-12-14 CN CN201521029255.7U patent/CN205176132U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112104419A (en) * | 2020-04-29 | 2020-12-18 | 杭州绿鲸科技有限公司 | Comparison filtering infrared communication circuit and implementation method |
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