CN113890512A - Low-power consumption double-circuit photoelectric switch driving circuit for intelligent gas meter of Internet of things - Google Patents
Low-power consumption double-circuit photoelectric switch driving circuit for intelligent gas meter of Internet of things Download PDFInfo
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Abstract
The invention relates to a low-power-consumption two-way photoelectric switch driving circuit for an intelligent gas meter of the Internet of things, 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 a disturbance removing 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, a photosensitive diode signal input PD1 and a photosensitive diode signal input PD 2; the latch signal generating circuit comprises a NAND gate; the holding circuit comprises a D flip-flop B and a D flip-flop C; the de-perturbation circuit comprises a three-input AND gate, a NOR gate A, a three-input NOR gate and a NOR gate B. With the narrow pulse driving technique, when the duty ratio of the driving pulse is less than 0.01%, the average current of the driving circuit is extremely 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 two-way photoelectric switch driving circuit for the 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 use of 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 technology of the internet of things in intelligent gas meters is more and more along with the gradual development of intelligent cloud services, the industry of the internet of things 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 the transmitting end of the infrared transmitting circuit is arranged opposite to the 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-circular arc-shaped strip shielding plate at the edge, and the semi-circular arc-shaped strip shielding plate is discontinuously cut off along with the rotation of the rotary table so as to cut off a passage between the transmitting end of the infrared transmitting circuit and the receiving end of the infrared receiving circuit.
The infrared ray is sent in the power supply of infrared emitting diode U1 through infrared emission source to above-mentioned patent, and photosensitive diode receives the infrared ray that infrared emission source sent, and photosensitive diode rethread resistance circuit converts received infrared ray into pulse signal feedback extremely MCU controller solves the problem that the mistake can appear in the sampling signal of magnetism sampling element 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 requires a large driving current, a battery of the continuous excitation light source on the gas meter cannot provide a large current, meanwhile, the gas meter has a complex use environment, and has some external magnetic field interference, and the external magnetic field can interfere with the normal work of a magnetic element in the intelligent gas meter, so that the detection data cannot be obtained in time, and the gas meter is controlled to be invalid, and counting errors are easily caused when a critical area and mechanical jitter occur.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a low-power-consumption two-way 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 less than 0.01% by a narrow pulse driving technology.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows.
A low-power consumption two-way photoelectric switch driving circuit 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 a disturbance removing 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, 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, a photosensitive diode signal input PD1 and a photosensitive diode signal input PD 2;
the latch signal generating circuit comprises a NAND gate;
the holding circuit comprises a D flip-flop B and a D flip-flop C;
the disturbance removing circuit comprises a three-input AND gate, a NOR gate A, a three-input NOR gate and a NOR gate B, wherein the output end of the NOR gate B is connected with the input ends of the three-input AND gate, the NOR gate A and the three-input NOR gate;
the clock signal clock is connected with a clock input end CK of a first D flip-flop A, an output end Q of the first D flip-flop A is connected with one input end of the NAND gate, output ends Q of the second to N D flip-flops A are all 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 the D flip-flop B and the D flip-flop C in parallel, the input end D of the D trigger B is connected with a photosensitive diode signal input PD1, the input end D of the D trigger C is connected with a photosensitive diode signal input PD2, the output end of the AND gate is connected with a light emitting diode driving signal output LED, the output end Q of the D trigger B is connected with the output ends of the three-input AND gate and the three-input NOR gate in parallel and then is connected with a signal output end OUT1, and the output end Q of the D trigger C is connected with the output ends of the three-input AND gate and the three-input NOR gate in parallel and then is connected with a signal output end OUT 2.
And N is 0-13.
And the output end Qn of the D trigger A is connected with the input end D of the D trigger A.
Clock generation circuit, narrow pulse generating circuit, light signal drive and light signal receiving circuit, latch signal generating circuit, holding circuit and disturbance removing circuit form a packaging circuit, packaging circuit has eight pins, eight pins are diode drive signal output LED, photodiode signal input PD1, photodiode signal input PD2, ground connection GND, power VCC, signal output terminal OUT1, signal output terminal OUT2 and output OUT end respectively.
The beneficial effect of this application is.
1. By means of narrow pulsesThe D flip-flop in the generating circuit consists of a twelve-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 narrow pulse output, and the pulse width is 2 xTclkPulse period of 214×TclkWhen the duty ratio of the driving pulse is less than 0.01%, the average current of the driving circuit is extremely small and is superior to dry spring sampling, the driving current required by the light emitting diode LED is small, and the output frequency of narrow pulse
2. When mechanical jitter occurs, the problem of counting errors can not be caused by the de-perturbation circuit, and the de-perturbation circuit can process signals in a critical area and remove the mechanical jitter.
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.
FIG. 3 is a schematic diagram of a critical position of the optoelectronic device according to the present invention in a relative displacement direction.
FIG. 4 is a waveform diagram of the critical position signal output in the de-perturbing circuit.
Fig. 5 is a schematic perspective view of an encoder according to the present invention.
The reference numbers in the figures are: 1. a printed circuit board; 2. a first opto-electronic component; 3 a second opto-electronic component; 4. a code disc; 5. a notch groove; 6. a light emitting diode; 7. a photodiode; 8. a circle center through hole; 41. a small half disc; 42. a large half disc; 101. a clock generation circuit; 102. a narrow pulse generating circuit; 103. an optical signal driving and receiving circuit; 104. a latch signal generating circuit; 105. a holding circuit; 106. a de-perturbation circuit; 107. a clock signal clock; 108. an AND gate; 109. d, triggering a trigger A; 110. a NAND gate; 111. d, a trigger B; 112. d, a trigger C; 113. a three-input AND gate; 114. a NOR gate A; 115. a three-input NAND gate; 116. and a NOR gate B.
Detailed Description
Example 1
As shown in fig. 1, the low-power consumption two-way 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 latching signal generating circuit 104, a holding circuit 105 and a disturbance removing circuit 106;
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, a photodiode signal input PD1 and a photodiode signal input PD 2;
the latch signal generating circuit 104 includes a nand gate 110;
the holding circuit 105 includes a D flip-flop B111 and a D flip-flop C112;
the de-perturbation circuit 106 comprises a three-input AND gate 113, a NOR gate A114, a three-input NOR gate 115 and a NOR gate B116, wherein the output end of the NOR gate B116 is connected with the input ends of the three-input AND gate 113, the NOR gate A114 and the three-input NOR gate 115, the output end of the three-input AND gate 113 is connected with the input end of the NOR gate A114, the output end of the three-input NOR gate 115 is connected with the input end of the NOR gate B116, and the input end of the NOR gate B116 is connected with the output OUT end of the NOR gate A114;
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 connected to the other input terminal of the nand gate 110, an output terminal of the nand gate 110 is connected in parallel to the clock input terminals CK of the D flip-flops B111 and C112, an input terminal D of the D flip-flop B111 is connected to the photodiode signal input PD1, an input terminal D of the D flip-flop C112 is connected to the photodiode signal input PD2, an output terminal of the and gate 108 is connected to the LED driving signal output LED, an output terminal Q of the D flip-flop B111 is connected in parallel to the three-input and gate 113 and the three-input nor gate 115 and then is connected to the signal output terminal OUT1, and an output terminal Q of the D flip-flop C112 is connected in parallel to the three-input and gate 113 and the three-input nor gate 115 and then is connected to the signal output terminal OUT gate 115 Terminal OUT 2.
And N is the duty ratio value N0-N13 of the narrow pulse generating circuit.
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, the hold circuit 105 and the de-perturbation circuit 106 form a packaged circuit, and the packaged circuit has eight pins, which are a diode driving signal output LED, a photodiode signal input PD1, a photodiode signal input PD2, a ground GND, a power VCC, a signal output terminal OUT1, a signal output terminal OUT2 and an output OUT terminal, respectively.
The photoelectric sampling device also comprises a photoelectric sampling device, as shown in fig. 5, the photoelectric sampling device comprises a printed circuit board 1, a first photoelectric component 2, a second photoelectric component 3, a coding disc 4 and a driving circuit, a notch groove 101 for the coding disc 4 to pass through is arranged on the printed circuit board 1, the first photoelectric component 2 and the second photoelectric component 3 are arranged on the printed circuit board 1 in parallel along the length direction of the notch groove 5, the printed circuit board 1 is integrated with the driving circuit, the driving circuit is respectively connected with the first photoelectric component 2 and the second photoelectric component 3, the two photoelectric components have the same structure and respectively comprise a light emitting diode 6 and a photosensitive diode 7, furthermore, the light emitting diode 6 and the photosensitive diode 7 in the two photoelectric components are respectively arranged on two sides of the notch groove 5 in a facing manner, the coding disc 4 is rotatably connected with a transmission shaft of a base meter and is positioned between the light emitting diode 6 and the photosensitive diode 7, when the gas meter works, the coding disc 4 rotates along with the transmission shaft, and when the coding disc rotates into the notch groove 5, the access between the light emitting diode 6 and the photosensitive diode 7 in the first photoelectric assembly 2 and the second photoelectric assembly 3 is cut off simultaneously.
The coding disc 4 comprises a small half disc 41 and a large half disc 42, the centers of the two half discs are circle center through holes 8, the circle center through holes 8 are used for penetrating a transmission shaft of the base meter, when the gas meter works, the two half discs rotate along with the transmission shaft of the base meter, and when the large half disc 42 rotates to the notch groove 5, the passage between the light emitting diode 6 and the photosensitive diode 7 in the first photoelectric assembly 2 and the second photoelectric assembly 3 is cut off simultaneously.
When the gas meter works, the transmission shaft of the base meter rotates, the coding disc connected with the transmission shaft of the base meter rotates along with the transmission shaft, the driving circuit respectively controls the two light emitting diodes on the printed circuit board to simultaneously emit infrared light signals to the corresponding photosensitive diodes, when the coding disc rotates to the notch groove, the paths between the light emitting diodes and the photosensitive diodes in the two photoelectric assemblies are cut off, the photosensitive diodes can not receive the light source signals of the light emitting diodes and output logic 1, when the coding disc rotates to the position outside the notch groove without shading, the photosensitive diode can receive the infrared light signal emitted by the corresponding light emitting diode and output logic 0, the coding disc continuously rotates, the photosensitive diode outputs a pulse signal with the same rotating frequency as the measured shaft, therefore, the rotation frequency of the measured shaft can be obtained by reading the frequency of the output signal of the photosensitive diode.
As shown in fig. 3, two sets of optoelectronic devices are provided, each set of optoelectronic device includes a light emitting diode 6 and a photodiode 7, which are disposed opposite to each other, the light emitting diode 6 is connected to a diode driving signal output LED, the two photodiodes 7 are respectively connected to a photodiode signal input PD1 and a photodiode signal input PD2, a code disc is disposed between the light emitting diode 6 and the photodiodes 7, the code disc expands the rotational motion of the code disc into a linear motion, a black filled area represents a shielded area, a white filled area represents an unshielded area, the rotational motion of the code disc corresponds to the relative motion of the optoelectronic devices, and the output signal of the photodiode in the optoelectronic device is logic 1 at this time.
The clock signal clock107 of the clock generation circuit 101 is a clock signal generation unit, and the RC multivibrator principle is adopted.
Through a D trigger in the narrow pulse generating circuit 102, the narrow pulse generating circuit is composed of a binary pulse counter with fourteen bits, 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 less than 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 is an amplifying circuit of the LED driving signal output LED, the photodiode signal input PD1, and the photodiode signal input PD 2.
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.
The disturbance removing circuit 106 is mainly used for correcting the disturbance of the critical zone and the mechanical jitter by the signals of the two paths of photosensitive elements and outputting the signals as one path of signals;
when the output out is 1, the output out is inverted to 0 only when (a) and (b) are 0 at the same time.
Second, when the output out is 0, the output out is inverted to 1 only when (a) and (b) are both 1.
The three-input AND gate 113, the NOR gate A114, the three-input NOR gate 115 and the NOR gate B116 form an RS trigger, and a truth table is as follows:
| c：S | d：R | e：Qn | out： |
| 1 | 1 | 0 | 0 |
| 1 | 0 | 0 | 1 |
| 0 | 1 | 1 | 0 |
| 0 | 0 | 1 | 0 |
| 0 | 0 | 0 | 1 |
table one: logical shape table of synchronous RS trigger
Thirdly, the output of the input AND gate 113 is a logic circuit which is turned from 0 to 1, and the output of the setting enable circuit is 1 when the output of the three-input AND gate 113 is 1; when the three-input and gate 113 output is 1, (e) is 1 (out is 0), and (a) and (b) are 1 at the same time; that is, it is realized that, when the output out is 0, the out is inverted to 1 only when (a) and (b) are both 1.
The three-input NOR gate 115 outputs a logic circuit which is inverted from 1 to 0, and a clear enable circuit, and when the output of the three-input NOR gate 115 is 1, the out outputs 0; the condition that the three-input nor gate 115 outputs 1 is that (e) is 0 (out is 1), and 0 at (a) and (b) at the same time; namely, the following steps are realized: when the output out is 1, out is inverted to 0 only when (a) and (b) are 0 at the same time.
As shown in fig. 3, in the figure, the optoelectronic component a and the optoelectronic component B are both corresponding light emitting diodes and photodiodes, the light emitting diodes are connected to a diode driving signal output LED, the photodiodes are respectively connected to a photodiode signal input PD1 and a photodiode signal input PD2, two groups of optoelectronic components have a code disk in the middle, the code disk is configured to perform a linear motion by spreading a rotational motion of the code disk, the code disk is configured in the middle of the optoelectronic switch, a black filled area represents a blocking area, a white filled area represents an unblocking area, the rotational motion of the code disk is equivalent to a relative motion of the optoelectronic components, and at this time, an output signal of the photodiode in the optoelectronic component is logic 1.
When the relative position of the code disc and the optoelectronic component is as shown in fig. 4, the optoelectronic component B is just in a critical region, and a part of the optoelectronic component B is shielded and a part of the optoelectronic component B is not shielded, at this time, the signal output of the photodiode in the optoelectronic component B is in an uncertain state, or is a logic 1, or is a logic 0, and may jump continuously between a logic "1" and a logic "0".
The logic processing circuit of the two-way photoelectric switch in the disturbance removing circuit 106 realizes the following functions: when the output is 1, if and only if a-0, b-0; the output jumps from logic 1 to logic 0; when the output is 0, if and only if a-1, b-1; the output transitions from a logic 0 to a logic 1.
The NOR gate A114 and the NOR gate B116 form an RS trigger, c is a SET setting input, d is a RESET resetting input, and the state truth table is as follows:
| c | d | e | out |
| 0 | 0 | x | /x |
| 0 | 1 | 1 | 0 |
| 1 | 0 | 0 | 1 |
| 1 | 1 | 0 | 0 |
table two: the logic table of NOR gate A114 and NOR gate B116 is shown as a table
When c is 0 and d is 1, the output out is 0;
when c is 1 and d is 0, the output out is 1;
as described above:
condition 1: the output out is inverted from 1 to 0 under the condition that d is 1; i.e., e-0, a-0, b-0;
condition 2: the condition that the output out is inverted from 0 to 1 is that c is 1; i.e., e-1, a-1, b-1;
when the photoelectric element a is located in the critical area, as shown in (i), even if a is 0, since the photoelectric element B is not located in the critical area, B is 1; c ═ d ═ 0; no flip condition is satisfied and so there is no change in the output out.
When the optoelectronic device B enters the critical area, as shown in (ii), the device a is not in the critical area, where a is 0, and if B is 0; then condition 1 is satisfied; the output is flipped from 1 to 0. If the output signal of b is 0 and 1 alternately, the output is turned to 0 when 0 is output for the first time; then, even if b jumps to 1, the conditions 1 and 2 are not satisfied, and the output is not changed.
And thirdly, the photoelectric component continuously and relatively translates along the direction indicated by the arrow in the figure, and when the photoelectric component A enters the next critical zone (shown by the third step), the conditions 1 and 2 are not met, and the output cannot be changed.
Fourthly, when the photoelectric component enters a critical area, the condition 2 is met; the output is inverted from 0 to 1.
In summary, the de-perturbation circuit 106 can process the critical section signal and remove the mechanical jitter.
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 those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, 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 those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.
Claims (4)
1. A low-power consumption double-circuit photoelectric switch drive circuit for thing networking intelligent gas table, its characterized in that: the device 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), a holding circuit (105) and a de-perturbation circuit (106);
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, a photodiode signal input PD1 and a photodiode signal input PD 2;
the latch signal generation circuit (104) comprises a NAND gate (110);
the holding circuit (105) includes a D flip-flop B (111) and a D flip-flop C (112);
the de-perturbation circuit (106) comprises a three-input AND gate (113), a NOR gate A (114), a three-input NOR gate (115) and a NOR gate B (116), wherein the output end of the NOR gate B (116) is connected with the input ends of the three-input AND gate (113), the NOR gate A (114) and the three-input NOR gate (115), the output end of the three-input AND gate (113) is connected with the input end of the NOR gate A (114), the output end of the three-input NOR gate (115) is connected with the input end of the NOR gate B (116), and the input end of the NOR gate B (116) is connected with the output OUT end of the NOR gate A (114);
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 ends CK of a D flip-flop B (111) and a D flip-flop C (112) in parallel, an input end D of the D flip-flop B (111) is connected with a photodiode signal input PD1, an input end D of the D flip-flop C (112) is connected with a photodiode signal input PD2, an output end of the AND gate (108) is connected with a light emitting diode driving signal output LED, an output end Q of the D flip-flop B (111) is connected with a three-input AND gate (113) and an output end of a three-input NOR gate (115) in parallel, and then is connected with a signal output end OUT1, and the output end Q of the D trigger C (112) is connected with the output ends of the three-input AND gate (113) and the three-input NOR gate (115) in parallel and then is connected with a signal output end OUT 2.
2. The low-power consumption two-way 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 two-way 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 two-way photoelectric switch driving circuit for the intelligent gas meter of the internet of things as claimed in claim 1, wherein: the clock generation circuit (101), the narrow pulse generation circuit (102), the optical signal driving and optical signal receiving circuit (103), the latch signal generation circuit (104), the holding circuit (105) and the de-disturbance circuit (106) form a packaging circuit, the packaging circuit has eight pins, and the eight pins are a diode driving signal output LED, a photodiode signal input PD1, a photodiode signal input PD2, a ground GND, a power supply VCC, a signal output end OUT1, a signal output end OUT2 and an output OUT end respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010637134.XA CN113890512B (en) | 2020-07-03 | 2020-07-03 | Low-power-consumption two-way photoelectric switch driving circuit for intelligent gas meter of Internet of things |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010637134.XA CN113890512B (en) | 2020-07-03 | 2020-07-03 | Low-power-consumption two-way photoelectric switch driving circuit for intelligent gas meter of Internet of things |
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| CN113890512A true CN113890512A (en) | 2022-01-04 |
| CN113890512B CN113890512B (en) | 2024-06-21 |
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| CN202010637134.XA Active CN113890512B (en) | 2020-07-03 | 2020-07-03 | Low-power-consumption two-way photoelectric switch driving circuit for intelligent gas meter of Internet of things |
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| US4741000A (en) * | 1985-06-26 | 1988-04-26 | Keyence Co., Ltd. | Photoelectronic switch |
| JPH05136676A (en) * | 1991-11-15 | 1993-06-01 | Alps Electric Co Ltd | Photoelectric switch |
| JP2005229390A (en) * | 2004-02-13 | 2005-08-25 | Omron Corp | Sensor |
| US20100067017A1 (en) * | 2008-09-18 | 2010-03-18 | Sharp Kabushiki Kaisha | Optical modulation-type detection device and electronic device |
| JP2011082936A (en) * | 2009-10-10 | 2011-04-21 | Oval Corp | Photoelectric-sensing sensitivity adjustment of field equipment |
| CN103743448A (en) * | 2013-09-29 | 2014-04-23 | 成都秦川科技发展有限公司 | Safe-cutoff remote control intelligent gas meter |
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| US4741000A (en) * | 1985-06-26 | 1988-04-26 | Keyence Co., Ltd. | Photoelectronic switch |
| JPH05136676A (en) * | 1991-11-15 | 1993-06-01 | Alps Electric Co Ltd | Photoelectric switch |
| JP2005229390A (en) * | 2004-02-13 | 2005-08-25 | Omron Corp | Sensor |
| US20100067017A1 (en) * | 2008-09-18 | 2010-03-18 | Sharp Kabushiki Kaisha | Optical modulation-type detection device and electronic device |
| JP2011082936A (en) * | 2009-10-10 | 2011-04-21 | Oval Corp | Photoelectric-sensing sensitivity adjustment of field equipment |
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| XIN-QIN ZHANG等: "All-optical switch and transistor based on coherent light-controlled single two-level atom coupling with two nanowires*", CHINESE PHYSICS B, vol. 28, no. 11, 1 November 2019 (2019-11-01), pages 114207 - 1 * |
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| CN113890512B (en) | 2024-06-21 |
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