CN112284464A - Intelligent water meter metering device and metering method - Google Patents
Intelligent water meter metering device and metering method Download PDFInfo
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- CN112284464A CN112284464A CN202011119389.3A CN202011119389A CN112284464A CN 112284464 A CN112284464 A CN 112284464A CN 202011119389 A CN202011119389 A CN 202011119389A CN 112284464 A CN112284464 A CN 112284464A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005070 sampling Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
- UFNIBRDIUNVOMX-UHFFFAOYSA-N 2,4'-dichlorobiphenyl Chemical compound C1=CC(Cl)=CC=C1C1=CC=CC=C1Cl UFNIBRDIUNVOMX-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/06—Indicating or recording devices
- G01F15/061—Indicating or recording devices for remote indication
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
- G06M1/00—Design features of general application
- G06M1/27—Design features of general application for representing the result of count in the form of electric signals, e.g. by sensing markings on the counter drum
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses an intelligent water meter metering device and a metering method, wherein the metering device comprises a circular rotating wheel, a first infrared pair tube, a second infrared pair tube, a circular light-isolating baffle, a controller and a PCB (printed circuit board), wherein the number of rotating turns of the circular rotating wheel is related to the accumulated water amount; the intelligent water meter adopts two reflective first and second infrared geminate transistors to be electrically connected with the controller and welded on a PCB (printed circuit board), adopts a circular rotating wheel to be installed on a rotating shaft of the base meter, the circular rotating wheel rotates forwards or backwards, and the forward and reverse rotation and counting of the intelligent water meter are judged according to the states of different output sequences of the first and second receiving tubes, so that the self interference and mutual interference of the first and second infrared geminate transistors are avoided, meanwhile, the structure of the metering device is simplified, the cost is reduced, and the signal anti-interference capability is improved by the metering method, thereby improving the metering accuracy.
Description
Technical Field
The invention belongs to the field of intelligent water meters, and particularly relates to a metering device and a metering method of an intelligent water meter.
Background
Nowadays, the intelligent water meter is widely applied to the society, and through technical development for many years, various metering modes are applied to actual products, but most of the metering modes generally adopt switch type sensors such as reed pipes or Hall sensors, a piece of magnetic steel is arranged on the circumference of a certain pole rotating shaft of a water meter core, when the shaft rotates to the magnetic steel to close a switch, a controller acquires a primary electronic signal, namely the shaft rotates for one circle to acquire a primary electronic signal, and the primary electronic signal is used as a primary electronic metering reading of the intelligent electronic water meter, so that the intelligent electronic water meter has weak anti-magnetic interference capability, low metering accuracy, complex metering device structure, high cost and is not beneficial to large-scale popularization; in addition, some metering modes adopt transmission-type infrared geminate transistors, the structure of a metering device is complex, and the anti-interference capability of signals acquired in the metering method is weak.
Disclosure of Invention
The invention aims to provide an intelligent water meter metering device and a metering method, which are used for improving the metering accuracy, simplifying the structure and reducing the cost.
The invention relates to an intelligent water meter metering device which comprises a circular rotating wheel, a first infrared pair tube, a second infrared pair tube, a circular light-isolating baffle, a controller and a PCB (printed circuit board); one half of the surface of the circular rotating wheel is a light reflecting surface, and the other half of the surface of the circular rotating wheel is a light absorbing surface, and the circular rotating wheel is arranged on the base watch rotating shaft and can rotate along with the base watch rotating shaft; the circular light-isolating baffle is provided with a first accommodating hole, a second accommodating hole, a third accommodating hole and a fourth accommodating hole, the first accommodating hole and the second accommodating hole are mutually separated and are positioned on one radius line A of the circular light-isolating baffle, the third accommodating hole and the fourth accommodating hole are mutually separated and are positioned on the other radius line B of the circular light-isolating baffle, the radius line A and the radius line B are mutually vertical, and the circular light-isolating baffle is arranged on the lower surface of the PCB and is positioned right above the circular rotating wheel; the first transmitting tube of the first infrared geminate transistor is located in the first accommodating hole and welded on the PCB, the first receiving tube of the first infrared geminate transistor is located in the second accommodating hole and welded on the PCB, the second transmitting tube of the second infrared geminate transistor is located in the third accommodating hole and welded on the PCB, the second receiving tube of the second infrared geminate transistor is located in the fourth accommodating hole and welded on the PCB, the controller is welded on the PCB, and the first transmitting tube, the first receiving tube, the second transmitting tube and the second receiving tube are electrically connected with the controller.
Preferably, the projections of the first transmitting tube and the second transmitting tube on the circular light-shielding baffle are on a circumference of the circular light-shielding baffle with a radius of R1, and the projections of the first receiving tube and the second receiving tube on the circular light-shielding baffle are on a circumference of the circular light-shielding baffle with a radius of R2. The radius R1 is less than the radius R2.
According to the intelligent water meter metering method, the base meter rotating shaft rotates to drive the circular rotating wheel to rotate, the rotating frequency of the circular rotating wheel is set to be F, and the signal sampling frequency is set to be F, wherein F is more than 4F; the method comprises the following steps:
Preferably, the change of the combination state of the first and second receiving pipes according to a first preset sequence means that: the combination state of the first receiving pipe and the second receiving pipe is changed from 01 to 00, then to 10 and then to 11; the change of the combined state of the first receiving pipe and the second receiving pipe according to a second preset sequence is as follows: the combination state of the first receiving pipe and the second receiving pipe is changed from 01 to 11, then to 10 and then to 00.
Compared with the prior art, the invention has the following effects:
(1) the intelligent water meter comprises a base meter, a controller, a first receiving tube, a second receiving tube, a circular rotating wheel, a controller, a first infrared geminate transistor, a second infrared geminate transistor, a third infrared geminate transistor, a fourth infrared geminate; the first transmitting tube and the first receiving tube and the second transmitting tube are isolated from each other by the circular light-isolating baffle, so that the interference of ambient light is reduced, the first receiving tube can only receive reflected light signals of the first transmitting tube, the second receiving tube can only receive reflected light signals of the second transmitting tube, the self interference and mutual interference of the first infrared geminate transistor and the second infrared geminate transistor are avoided, the structure of the metering device is simplified, and the cost is reduced.
(2) The size relation between Va2-Va1 and K (C-Va1) and the size relation between Vb2-Vb1 and K (C-Vb1) are used as judgment conditions for judging the states of the first receiving tube and the second receiving tube, so that the signal anti-interference capability is obviously improved, and the metering accuracy is improved.
Drawings
Fig. 1 is a schematic position diagram of a first infrared pair tube and a second infrared pair tube in the invention.
FIG. 2 is a schematic view of the structure of the circular wheel of the present invention.
Fig. 3 is a cut-away schematic view of the intelligent water meter metering device of the invention.
Fig. 4 is a schematic block diagram of the circuit of the present invention.
Fig. 5 is a flow chart of a metering method of the intelligent water meter according to the invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The intelligent water meter metering device shown in fig. 1 to 4 comprises a circular rotating wheel 1, a first infrared pair tube, a second infrared pair tube, a circular light-isolating baffle 6, a controller 7 and a PCB board 8. The circular rotating wheel 1 has a light reflecting surface (i.e., the light reflecting surface occupies 180 °) on one half and a light absorbing surface (i.e., the light absorbing surface occupies 180 °) on the other half, and is mounted on a base meter rotating shaft (not shown) and can rotate along with the base meter rotating shaft. The circular light-isolating baffle 6 is made of black light-absorbing materials, a first containing hole 61, a second containing hole 62, a third containing hole 63 and a fourth containing hole 64 are formed in the circular light-isolating baffle 6, the first containing hole 61 and the second containing hole 62 are mutually separated and are positioned on one radius line A of the circular light-isolating baffle 6, the third containing hole 63 and the fourth containing hole 64 are mutually separated and are positioned on the other radius line B of the circular light-isolating baffle 6, and the radius line A is perpendicular to the radius line B. The circular light-isolating baffle 6 is arranged on the lower surface of the PCB 8 and is positioned right above the circular rotating wheel 1; a first transmitting tube 2 of the first infrared geminate transistor is positioned in the first accommodating hole 61 and welded on the PCB 8, a first receiving tube 3 of the first infrared geminate transistor is positioned in the second accommodating hole 62 and welded on the PCB 8, a second transmitting tube 4 of the second infrared geminate transistor is positioned in the third accommodating hole 63 and welded on the PCB 8, a second receiving tube 5 of the second infrared geminate transistor is positioned in the fourth accommodating hole 64 and welded on the PCB 8, and the controller 7 is welded on the PCB 8; the projections of the first and second transmitting tubes 2 and 4 on the circular light-shielding baffle 6 are located on a circumference of the circular light-shielding baffle 6 with a radius of R1 (i.e. the distance from the center of the projection of the first transmitting tube 2 on the circular light-shielding baffle 6 to the center of the circular light-shielding baffle 6 is R1, and the distance from the center of the projection of the second transmitting tube 4 on the circular light-shielding baffle 6 to the center of the circular light-shielding baffle 6 is R1), the projections of the first and second receiving tubes 3 and 5 on the circular light-shielding baffle 6 are located on a circumference of the circular light-shielding baffle 6 with a radius of R2 (i.e. the distance from the center of the projection of the first receiving tube 3 on the circular light-shielding baffle 6 to the center of the circular light-shielding baffle 6 is R2, the distance from the center of the projection of the second receiving tube 5 on the circular light-shielding baffle 6 to the center of the circular light-shielding baffle 6 is R2), and the radius R1 is smaller than the radius R2 (i.e. the first receiving tube 2 is located inside, the second transmitting tube 4 is positioned at the inner side of the second receiving tube 5), the centers of the projections of the first transmitting tube 2 and the first receiving tube 3 on the circular light-shielding baffle 6 are all positioned on a radius line A, and the centers of the projections of the second transmitting tube 4 and the second receiving tube 5 on the circular light-shielding baffle 6 are all positioned on a radius line B. The controller 7 comprises an AD conversion module, a storage module and a single chip microcomputer electrically connected with the AD conversion module and the storage module, the single chip microcomputer is electrically connected with the first transmitting tube 2, the first receiving tube 3, the second transmitting tube 4 and the second receiving tube 5, and the first receiving tube 3 and the second receiving tube 5 are electrically connected with the AD conversion module.
In the intelligent water meter metering method shown in fig. 5, by using the above intelligent water meter metering device, the rotation of the base meter rotating shaft drives the circular rotating wheel 1 to rotate, the number of rotation turns of the circular rotating wheel 1 is related to the accumulated water amount, the rotation frequency of the circular rotating wheel 1 is set to be F, and the signal sampling frequency is set to be F, wherein F is greater than 4F; the metering method specifically comprises the following steps:
firstly, after each signal sampling period begins, the singlechip controls the first transmitting tube 2 and the second transmitting tube 4 not to be electrified and controls the first receiving tube 3 and the second receiving tube 5 to be electrified, the AD conversion module collects voltage Va1 (Va 1 is generated by ambient light) output by the first receiving tube 3 and voltage Vb1 (Vb 1 is generated by ambient light) output by the second receiving tube 5, converts the voltage Va1 into an AD value and sends the AD value to the singlechip, and then the second step is executed;
secondly, the singlechip acquires and records the AD value of the voltage Va1 and the AD value of the voltage Vb1, and then executes the third step;
thirdly, the singlechip controls the first transmitting tube 2 and the second transmitting tube 4 to be electrified, the AD conversion module collects voltage Va2 (Va 2 is generated by overlapping ambient light and infrared light emitted by the first transmitting tube and reflected by a circular rotating wheel) output by the first receiving tube 3 and voltage Vb2 (Vb 2 is generated by overlapping ambient light and infrared light emitted by the second transmitting tube and reflected by the circular rotating wheel) output by the second receiving tube 5, the voltage Vb is converted into an AD value and is sent to the singlechip, and then the fourth step is executed;
fourthly, the singlechip acquires and records the AD value of the voltage Va2 and the AD value of the voltage Vb2, and then executes the fifth step;
fifthly, controlling the first transmitting tube 2, the first receiving tube 3, the second transmitting tube 4 and the second receiving tube 5 to be powered off by the single chip microcomputer, and then executing a sixth step;
sixthly, the single chip microcomputer judges whether Va2-Va1 is larger than K (C-Va1), wherein K represents a preset proportionality coefficient, C represents a preset constant, if yes, the seventh step is executed, and if not, the eighth step is executed;
seventhly, the single chip microcomputer marks the state of the first receiving pipe 3 as 1 (high), and then the ninth step is executed;
eighthly, the single chip microcomputer marks the state of the first receiving pipe 3 as 0 (low), and then the ninth step is executed;
the ninth step, the singlechip judges whether Vb2-Vb1 is greater than K (C-Vb1), if so, the tenth step is executed, otherwise, the eleventh step is executed;
step ten, the singlechip marks the state of the second receiving tube 5 as 1 (high), and then executes the step twelfth;
step eleven, the singlechip marks the state of the second receiving tube 5 as 0 (low), and then executes the step twelfth;
step ten, the singlechip stores the combined state of the first receiving tube 3 and the second receiving tube 5 in a storage module, and then executes the step thirteen;
step thirteen, the singlechip judges whether the combined state of the first receiving pipe 3 and the second receiving pipe 5 is changed from 01 to 00, then to 10 and then to 11 (namely whether the combined state is low-high → high-low → high), if so, the fourteenth step is executed, otherwise, the fifteenth step is executed;
fourteenth, the single chip microcomputer adds and stores the electronic metering values in a storage module, and then the fifteenth step is executed;
fifteenth, the single chip microcomputer judges whether the combination state of the first receiving pipe 3 and the second receiving pipe 5 is changed from 01 to 11, then to 10 and then to 00 (namely whether the combination state is low high → low), if so, the sixteenth step is executed, otherwise, the seventeenth step is executed;
sixthly, the single chip microcomputer subtracts the electronic metering value and stores the electronic metering value in the storage module, and then the single chip microcomputer returns to execute the first step;
seventeenth step, the single chip microcomputer keeps the electronic metering value unchanged, and then the first step is executed in a returning mode.
Claims (5)
1. The utility model provides an intelligence water gauge metering device which characterized in that: the device comprises a circular rotating wheel (1), a first infrared pair tube, a second infrared pair tube, a circular light-isolating baffle (6), a controller (7) and a PCB (8); one half of the surface of the round rotating wheel (1) is a light reflecting surface, and the other half of the surface of the round rotating wheel is a light absorbing surface, and the round rotating wheel (1) is arranged on the base watch rotating shaft and can rotate along with the base watch rotating shaft; the round light-isolating baffle (6) is provided with a first accommodating hole, a second accommodating hole, a third accommodating hole and a fourth accommodating hole (61, 62, 63 and 64), the first accommodating hole (61) and the second accommodating hole (62) are mutually isolated and are positioned on one radius line A of the round light-isolating baffle (6), the third accommodating hole (63) and the fourth accommodating hole (64) are mutually isolated and are positioned on the other radius line B of the round light-isolating baffle (6), the radius line A and the radius line B are mutually vertical, and the round light-isolating baffle (6) is arranged on the lower surface of the PCB (8) and is positioned right above the round rotating wheel (1); first transmitting tube (2) of first infrared geminate transistor is located first holding hole (61) and welds on PCB board (8), first receiver tube (3) of first infrared geminate transistor is located second holding hole (62) and welds on PCB board (8), second transmitting tube (4) of second infrared geminate transistor is located third holding hole (63) and welds on PCB board (8), second receiver tube (5) of second infrared geminate transistor is located fourth holding hole (64) and welds on PCB board (8), controller (7) welding is on PCB board (8), first transmitting tube (2), first receiver tube (3), second transmitter tube (4), second receiver tube (5) are connected with controller (7) electricity.
2. The intelligent water meter metering device of claim 1, wherein: the projections of the first transmitting tube (2) and the second transmitting tube (4) on the circular light-blocking baffle (6) are positioned on the circumference of the circular light-blocking baffle (6) with the radius of R1, and the projections of the first receiving tube (3) and the second receiving tube (5) on the circular light-blocking baffle (6) are positioned on the circumference of the circular light-blocking baffle (6) with the radius of R2.
3. An intelligent water meter metering device as claimed in claim 2, wherein: the radius R1 is less than the radius R2.
4. An intelligent water meter metering method, which adopts the intelligent water meter metering device as claimed in any one of claims 1 to 3, wherein the rotation of the base meter rotating shaft drives the circular rotating wheel (1) to rotate, the rotating frequency of the circular rotating wheel (1) is set to be F, and the signal sampling frequency is set to be F, wherein F is more than 4F; the method is characterized by comprising the following steps:
step 1, after each signal sampling period starts, on the premise of not opening the first transmitting tube (2) and the second transmitting tube (4), the controller (7) controls the first receiving tube (3) and the second receiving tube (5) to be electrified, collects and records voltage Va1 output by the first receiving tube (3) and voltage Vb1 output by the second receiving tube (5), and then executes step 2;
step 2, the controller (7) controls the first transmitting tube (2) and the second transmitting tube (4) to be electrified, collects and records the voltage Va2 output by the first receiving tube (3) and the voltage Vb2 output by the second receiving tube (5), then controls the first transmitting tube (2), the first receiving tube (3), the second transmitting tube (4) and the second receiving tube (5) to be electrified, and then executes the step 3;
step 3, the controller (7) judges whether Va2-Va1 is larger than K (C-Va1), if so, the state of the first receiving pipe (3) is marked as 1, otherwise, the state of the first receiving pipe (3) is marked as 0; the controller (7) judges whether Vb2-Vb1 is greater than K (C-Vb1), if so, the state of the second receiving pipe (5) is marked as 1, otherwise, the state of the second receiving pipe (5) is marked as 0; wherein K represents a preset proportionality coefficient, C represents a preset constant, and then step 4 is executed;
step 4, the controller (7) stores the combined state of the first receiving pipe and the second receiving pipe (3 and 5), and then step 5 is executed;
and step 5, judging the combination state of the first receiving pipe and the second receiving pipe (3 and 5) by the controller (7): if the combination state of the first and second receiving pipes (3, 5) changes according to a first preset sequence, the controller (7) adds one to the electronic metering value, if the combination state of the first and second receiving pipes (3, 5) changes according to a second preset sequence, the controller (7) subtracts one from the electronic metering value, otherwise, the controller (7) keeps the electronic metering value unchanged, and then the step 1 is executed in a returning mode.
5. The intelligent water meter metering method of claim 4, wherein: the change of the combination state of the first receiving pipe and the second receiving pipe (3 and 5) according to a first preset sequence means that: the combination state of the first receiving pipe (3) and the second receiving pipe (5) is changed from 01 to 00, then to 10 and then to 11; the change of the combination state of the first receiving pipe and the second receiving pipe (3 and 5) according to a second preset sequence is that: the combination state of the first and second receiving pipes (3, 5) is changed from 01 to 11, then to 10, and then to 00.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011119389.3A CN112284464A (en) | 2020-10-19 | 2020-10-19 | Intelligent water meter metering device and metering method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011119389.3A CN112284464A (en) | 2020-10-19 | 2020-10-19 | Intelligent water meter metering device and metering method |
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| CN112284464A true CN112284464A (en) | 2021-01-29 |
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| CN202011119389.3A Pending CN112284464A (en) | 2020-10-19 | 2020-10-19 | Intelligent water meter metering device and metering method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1851413A (en) * | 2006-05-17 | 2006-10-25 | 江苏技术师范学院 | Signal generating method for rotating angle measurment and its operating method |
| CN102809399A (en) * | 2012-08-29 | 2012-12-05 | 重庆市智能水表有限责任公司 | Intelligent electronic water meter and forward and backward rotary metering method thereof |
| CN106643951A (en) * | 2016-11-15 | 2017-05-10 | 金卡高科技股份有限公司 | Novel pulse metering device in fuel gas meter end and metering method |
| CN109341822A (en) * | 2018-11-03 | 2019-02-15 | 艾特仪表科技（深圳）有限公司 | Using the character wheel positive and negative rotation detection method of two light transmission through-holes |
| CN110440636A (en) * | 2019-09-21 | 2019-11-12 | 朱幕松 | Annular accelerates magnetic artillery |
| CN110444608A (en) * | 2019-05-28 | 2019-11-12 | 弘凯光电(深圳)有限公司 | A kind of optical sensor of range measurement and preparation method thereof |
| CN210036854U (en) * | 2019-12-07 | 2020-02-07 | 山东潍微科技股份有限公司 | Intelligent water meter counting device based on light and shadow sensing |
-
2020
- 2020-10-19 CN CN202011119389.3A patent/CN112284464A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1851413A (en) * | 2006-05-17 | 2006-10-25 | 江苏技术师范学院 | Signal generating method for rotating angle measurment and its operating method |
| CN102809399A (en) * | 2012-08-29 | 2012-12-05 | 重庆市智能水表有限责任公司 | Intelligent electronic water meter and forward and backward rotary metering method thereof |
| CN106643951A (en) * | 2016-11-15 | 2017-05-10 | 金卡高科技股份有限公司 | Novel pulse metering device in fuel gas meter end and metering method |
| CN109341822A (en) * | 2018-11-03 | 2019-02-15 | 艾特仪表科技（深圳）有限公司 | Using the character wheel positive and negative rotation detection method of two light transmission through-holes |
| CN110444608A (en) * | 2019-05-28 | 2019-11-12 | 弘凯光电(深圳)有限公司 | A kind of optical sensor of range measurement and preparation method thereof |
| CN110440636A (en) * | 2019-09-21 | 2019-11-12 | 朱幕松 | Annular accelerates magnetic artillery |
| CN210036854U (en) * | 2019-12-07 | 2020-02-07 | 山东潍微科技股份有限公司 | Intelligent water meter counting device based on light and shadow sensing |
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