CN113890510A - Low-power consumption single-path photoelectric switch driving circuit for Internet of things intelligent gas meter - Google Patents
Low-power consumption single-path photoelectric switch driving circuit for Internet of things intelligent gas meter Download PDFInfo
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- CN113890510A CN113890510A CN202010635570.3A CN202010635570A CN113890510A CN 113890510 A CN113890510 A CN 113890510A CN 202010635570 A CN202010635570 A CN 202010635570A CN 113890510 A CN113890510 A CN 113890510A
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- 230000003287 optical effect Effects 0.000 claims abstract description 11
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 230000006855 networking Effects 0.000 claims 1
- 238000005070 sampling Methods 0.000 abstract description 9
- 235000014676 Phragmites communis Nutrition 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 18
- 238000010586 diagram Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/01—Details
- H03K3/012—Modifications of generator to improve response time or to decrease power consumption
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
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Abstract
The invention relates to a low-power consumption single-path photoelectric switch driving circuit for an Internet of things intelligent gas meter, which comprises a clock generating circuit, a narrow pulse generating circuit, an optical signal driving and receiving circuit, a latching signal generating circuit, a holding circuit and an output circuit, wherein the clock generating circuit is connected with the narrow pulse generating circuit; the clock generation circuit comprises a clock signal clock; the narrow pulse generating circuit comprises an AND gate 108 and N D triggers A; the optical signal driving and receiving circuit comprises a light emitting diode driving signal output LED and a photosensitive diode signal input PD. The LED drive circuit is characterized in that a D trigger in a narrow pulse generating circuit consists of a twelve-digit binary pulse counter, wherein the output of the binary pulse counter is N0-N13 which has twelve digits, the average current of the drive circuit is extremely small, the drive circuit is superior to reed sampling, and the drive current required by the light emitting of an LED is small.
Description
Technical Field
The invention relates to the technical field of intelligent gas meters of the Internet of things, in particular to a low-power consumption single-path photoelectric switch driving circuit for an intelligent gas meter of the Internet of things.
Background
Along with the improvement of the informatization, intellectualization and scientific and technological level of China, the application of the intelligent metering technology in the gas meter is more and more extensive, and along with the continuous development and progress of the society, the status and the role of the natural gas in the development of the modern society and the life of residents are more and more important; along with the large-scale popularization and application of urban pipelines, the application of gas meters also deepens into thousands of households, and along with the expansion of urban scales, the application of the internet of things technology in intelligent gas meters is more and more along with the gradual development of intelligent cloud services, the internet of things industry and the technology aiming at the requirements of gas companies on gas meter monitoring and gas consumption large data analysis.
The sampling and counting of the gas meter mainly comprise a reed switch, a Hall switch sensor and a photoelectric encoder, wherein the reed switch, the Hall switch and the photoelectric encoder all belong to magnetic elements, and the situation of measurement failure can occur under the condition of external strong magnetic field interference.
Chinese patent grant publication no: CN210777125U discloses a gas meter light pulse sampling device, which relates to the technical field of Internet of things intelligent gas meters and comprises an MCU controller, an infrared transmitting circuit, an infrared receiving circuit and a metering pulse shielding assembly; the device comprises an infrared transmitting circuit and an infrared receiving circuit which are controlled by the MCU controller, wherein a transmitting end of the infrared transmitting circuit is arranged opposite to a receiving end of the infrared receiving circuit, and the metering pulse shielding assembly is arranged between the transmitting end of the infrared transmitting circuit and the receiving end of the infrared receiving circuit; the metering pulse shielding assembly is a rotary table which rotates along with the gas meter by taking the middle as a circle center and is provided with a semi-arc-shaped shielding plate at the edge, and the semi-arc-shaped shielding plate cuts off a passage between the transmitting end of the infrared transmitting circuit and the receiving end of the infrared receiving circuit discontinuously along with the rotation of the rotary table.
The infrared ray is sent in the power supply of infrared emitting diode U1 through infrared emitting source to above-mentioned patent, and photosensitive diode receives the infrared ray that infrared emitting source sent, and photosensitive diode rethread resistance circuit converts received infrared ray into pulse signal feedback extremely MCU controller solves the problem that the wrong can appear in the sampling signal of magnetic sampling component gas table under the condition that receives external strong magnetic field interference. However, photoelectric sampling requires an excitation light source, the excitation light source is provided by a Light Emitting Diode (LED), the light emitting of the LED needs a large driving current, and a battery on the gas meter for continuously exciting the light source cannot provide a large current.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a low-power consumption single-path photoelectric switch driving circuit for an intelligent gas meter of the internet of things, and the average current of the driving circuit is extremely small when the duty ratio of driving pulses is slightly 0.01% by a narrow pulse driving technology.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows.
The low-power consumption single-path photoelectric switch driving circuit for the Internet of things intelligent gas meter comprises a clock generating circuit, a narrow pulse generating circuit, an optical signal driving and receiving circuit, a latching signal generating circuit and a holding circuit;
the clock generation circuit comprises a clock signal clock;
the narrow pulse generating circuit comprises an AND gate and N D triggers A, wherein a first output end Q of each D trigger A is sequentially connected with a clock input end CK of the next D trigger A, and output ends Q of the second to N D triggers A are connected with the input end of the AND gate;
the optical signal driving and receiving circuit comprises a light emitting diode driving signal output LED and a photosensitive diode signal input PD;
the latch signal generating circuit comprises a NAND gate;
the holding circuit comprises a D flip-flop B;
the clock signal clock is connected with a clock input end CK of a first D trigger A, an output end Q of the first D trigger A is connected with one input end of a NAND gate, output ends Q of second to N D triggers A are connected with the other input end of the NAND gate, the output end of the NAND gate is connected with the clock input end CK of a D trigger B, an input end D of the D trigger B is connected with a photosensitive diode signal input PD, the output end of the AND gate is connected with a light emitting diode driving signal output LED, and the output end Q of the D trigger B is connected with a signal output end OUT.
And N is the duty ratio value N0-N13 of the narrow pulse generating circuit. .
And the output end Qn of the D trigger A is connected with the input end D of the D trigger A.
Clock generating circuit, narrow pulse generating circuit, light signal drive and light signal receiving circuit, latch signal generating circuit and holding circuit form a packaging circuit, packaging circuit has five pins, five pins are diode drive signal output LED, photosensitive diode signal input PD, ground connection GND, power VCC and output OUT end respectively.
The beneficial effect of this application is.
1. Through a D trigger in a narrow pulse generating circuit, the narrow pulse generating circuit consists of a twelve-bit binary pulse counter, wherein the output of the binary counter is twelve bits in total of N0-N13, the output N1-N13 is subjected to logical AND operation to obtain a narrow pulse output, and the pulse width is 2 xTclkPulse period of 214×TclkWhen the duty ratio of the driving pulse is slightly 0.01%, the average current of the driving circuit is extremely small, which is superior to dry reed sampling, and the light emitting diode
Drawings
FIG. 1 is a circuit diagram of the present invention.
Fig. 2 is a schematic diagram of a package circuit structure according to the present invention.
The reference numbers in the figures are: 101. clock generation circuit 102, narrow pulse generation circuit 103, optical signal driving and receiving circuit 104, latch signal generation circuit 105, holding circuit 107, clock signal clock 108, and gate 109, D flip-flops a and 110, nand gate 111, and D flip-flop B.
Detailed Description
Example 1
As shown in fig. 1, the low-power consumption single-path photoelectric switch driving circuit for the internet of things intelligent gas meter comprises a clock generating circuit 101, a narrow pulse generating circuit 102, an optical signal driving and receiving circuit 103, a latch signal generating circuit 104 and a holding circuit 105;
the clock generation circuit 101 includes a clock signal clock 107;
the narrow pulse generating circuit 102 comprises an and gate 108 and N D flip-flops a109, wherein a first output end Q of the D flip-flop a109 is sequentially connected with a clock input end CK of a next D flip-flop a109, and output ends Q of the second to N D flip-flops a109 are all connected with an input end of the and gate 108;
the optical signal driving and receiving circuit 103 comprises a light emitting diode driving signal output LED and a photodiode signal input PD;
the latch signal generating circuit 104 includes a nand gate 110;
the holding circuit 105 includes a D flip-flop B111;
the clock signal clock107 is connected to a clock input terminal CK of a first D flip-flop a109, an output terminal Q of the first D flip-flop a109 is connected to one input terminal of the nand gate 110, output terminals Q of second to N D flip-flops a109 are all connected to another input terminal of the nand gate 110, an output terminal of the nand gate 110 is connected to the clock input terminal CK of the D flip-flop B111, an input terminal D of the D flip-flop B111 is connected to the photodiode signal input PD, an output terminal of the and gate 108 is connected to the LED for outputting a light emitting diode driving signal, and an output terminal Q of the D flip-flop B111 is connected to a signal output terminal OUT.
The N is the duty cycle value N0-N13 of the narrow pulse generating circuit 102. .
The output end Qn of the D flip-flop a109 is connected to its own input end D.
As shown in fig. 2, the clock generation circuit 101, the narrow pulse generation circuit 102, the optical signal driving and receiving circuit 103, the latch signal generation circuit 104, and the holding circuit 105 form a packaged circuit having five pins, which are a diode driving signal output LED01, a photodiode signal input PD02, a ground GND03, a power VCC04, and an output OUT terminal 05, respectively.
The clock signal clock107 of the clock generation circuit 101 is a clock signal generation unit, and the RC multiple oscillator principle is adopted.
Through a D trigger in the narrow pulse generating circuit 102, the narrow pulse generating circuit is composed of a fourteen-bit binary pulse counter, wherein the output of the binary counter is N0-N13 with fourteen bits, the output N1-N13 is subjected to logical AND operation to obtain a narrow pulse output, and the pulse width is 2 xTclkPulse period of 214×TclkWhen the duty ratio of the driving pulse is slightly 0.01%, the average current of the driving circuit is extremely small and is superior to dry reed sampling.
The optical signal driving and receiving circuit 103 outputs LED for LED driving signal and PD for photodiode signal input.
The latch signal generating circuit 104 is a sample-and-hold circuit latch signal obtained by NAND operation of the outputs (N0-N13) of the binary counter, and the clock of the output latch circuit is delayed by one clock period T from the pulse of the LED drive signalclk。
The hold circuit 105 holds the received signal of the photodiode until the next sampling instant when the LED light source is active.
In the description of the present invention, it should be noted that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the spirit of the invention, which falls within the scope of the invention.
Claims (4)
1. A low-power consumption single current photoelectric switch drive circuit for thing networking intelligent gas table, its characterized in that: the circuit comprises a clock generating circuit (101), a narrow pulse generating circuit (102), an optical signal driving and receiving circuit (103), a latch signal generating circuit (104) and a holding circuit (105);
the clock generation circuit (101) comprises a clock signal clock (107);
the narrow pulse generating circuit (102) comprises an AND gate (108) and N D triggers A (109), wherein a first output end Q of each D trigger A (109) is sequentially connected with a clock input end CK of the next D trigger A (109), and output ends Q of the second to N D triggers A (109) are connected with an input end of the AND gate (108);
the optical signal driving and receiving circuit (103) comprises a light emitting diode driving signal output LED and a photosensitive diode signal input PD;
the latch signal generation circuit (104) comprises a NAND gate (110);
the holding circuit (105) comprises a D flip-flop B (111);
the clock signal clock (107) is connected with a clock input end CK of a first D flip-flop A (109), an output end Q of the first D flip-flop A (109) is connected with one input end of a NAND gate (110), output ends Q of second to N D flip-flops A (109) are connected with the other input end of the NAND gate (110), an output end of the NAND gate (110) is connected with the clock input end CK of a D flip-flop B (111), an input end D of the D flip-flop B (111) is connected with a photosensitive diode signal input PD, an output end of the AND gate (108) is connected with a light emitting diode driving signal output LED, and an output end Q of the D flip-flop B (111) is connected with a signal output end OUT.
2. The low-power consumption single-path photoelectric switch driving circuit for the intelligent gas meter of the internet of things as claimed in claim 1, wherein: the N is a duty cycle value N0-N13 of the narrow pulse generating circuit (102).
3. The low-power consumption single-path photoelectric switch driving circuit for the intelligent gas meter of the internet of things as claimed in claim 1, wherein: the output end Qn of the D trigger A (109) is connected with the input end D of the D trigger A.
4. The low-power consumption single-path photoelectric switch driving circuit for the intelligent gas meter of the internet of things as claimed in claim 1, wherein: clock generation circuit (101), narrow pulse generation circuit (102), light signal drive and light signal receiving circuit (103), latch signal generation circuit (104) and holding circuit (105) form a packaging circuit, packaging circuit has five pins, five pins are diode drive signal output LED, photosensitive diode signal input PD, ground connection GND, power VCC and output OUT end respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010635570.3A CN113890510A (en) | 2020-07-03 | 2020-07-03 | Low-power consumption single-path photoelectric switch driving circuit for Internet of things intelligent gas meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010635570.3A CN113890510A (en) | 2020-07-03 | 2020-07-03 | Low-power consumption single-path photoelectric switch driving circuit for Internet of things intelligent gas meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113890510A true CN113890510A (en) | 2022-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010635570.3A Withdrawn CN113890510A (en) | 2020-07-03 | 2020-07-03 | Low-power consumption single-path photoelectric switch driving circuit for Internet of things intelligent gas meter |
Country Status (1)
| Country | Link |
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| CN (1) | CN113890510A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0575420A (en) * | 1991-09-11 | 1993-03-26 | Omron Corp | Photoelectric switch |
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2020
- 2020-07-03 CN CN202010635570.3A patent/CN113890510A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0575420A (en) * | 1991-09-11 | 1993-03-26 | Omron Corp | Photoelectric switch |
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Application publication date: 20220104 |
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