CN2769855Y - Intelligent watermeter with photoelectric detection sampling circuit - Google Patents
Intelligent watermeter with photoelectric detection sampling circuit Download PDFInfo
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- CN2769855Y CN2769855Y CN 200520053985 CN200520053985U CN2769855Y CN 2769855 Y CN2769855 Y CN 2769855Y CN 200520053985 CN200520053985 CN 200520053985 CN 200520053985 U CN200520053985 U CN 200520053985U CN 2769855 Y CN2769855 Y CN 2769855Y
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- photoelectric detection
- triode
- pipe
- electrically connected
- counter gear
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Abstract
The utility model relates to an intelligent water meter with a photoelectric detection sampling circuit. A circuit board comprises a photoelectric detection sampling circuit which comprises a triode Q1, two photoelectric detection pair pipes Q2 and Q3 and two comparators (3), wherein the two photoelectric detection pair pipes Q2 and Q3 are closely adjacent to a counter gear (2); the base of the triode Q1 is electrically connected with one I/O port of a microprocessor (1); a light-emitting diode and a photosensitive triode of the photoelectric detection pair pipe Q2 are respectively electrically connected with the collector of the triode Q1, and a light-emitting diode and a photosensitive triode of the photoelectric detection pair pipe Q3 are also respectively electrically connected with the collector of the triode Q1; the input ends of the two comparators (3) are respectively electrically with the collectors of the photosensitive triodes of the photoelectric detection pair pipes Q2 and Q3, and the output ends of the two comparators (3) are respectively electrically with the other two I/O ports of the microprocessor (1). The utility model has the advantages of simple circuit, low cost, high metering precision of the water meter and identification of the rotating direction of the counter gear.
Description
Technical field the utility model relates to the instrument of measuring discharge, particularly relates to the intellectual water meter counter gear sample circuit that uses electronic installation.
Background technology prior art intellectual water meter is used tongue tube (comprising sensors such as Hall element, Wei root device) that the water meter counter gear is rotated usually and is sampled.Magnet is installed on the counter gear, and magnet moves with counter gear, and magnet is through out-of-date reed switch contact closure, and reed switch contact disconnects when leaving.There is following defective in this sample mode: 1. be subject to the external magnetic field influence and cause miscount; 2. the acting force between tongue tube and magnet influences water meter initiating flow indicator; 3. the reason such as short and magnet loss of excitation owing to the tongue tube life-span influences water meter serviceable life; 4. can't be with the direction of motion of two tongue tube identification and counting machine gears.
In order to overcome this class magnetic element of described tongue tube and magnet the water meter counter gear is rotated the existing defective of sampling, someone attempted taking inductance type not have the magnetic sample mode and substituted the magnetic sample mode, the circuit that promptly adopts inductance or be made up of inductance and electric capacity rotates counter gear and samples, and oscillation frequency, the amplitude of inductance or circuit change along with the rotation of counter gear.But this no magnetic sample mode is because of exist that circuit is numerous and diverse, cost is high, power consumption is big and significant deficiency such as failure rate height can not drop into and uses always in the intellectual water meter that uses electronic installation.
The summary of the invention the technical problems to be solved in the utility model is to avoid above-mentioned the deficiencies in the prior art part and proposes the intellectual water meter with Photoelectric Detection sample circuit of the simple and long service life of a kind of measuring accuracy height, circuit.
The utility model solve the technical problem can be by realizing by the following technical solutions:
Design, a kind of intellectual water meter of use with Photoelectric Detection sample circuit, comprise shell, place movement and circuit board in the shell, described circuit board comprises microprocessor, described movement comprises counter gear, described circuit board also comprises the Photoelectric Detection sample circuit, and this Photoelectric Detection sample circuit comprises that two Photoelectric Detection of triode Q1, adjacent described counter gear are to pipe Q2 and Q3 and two comparers; The base stage of described triode Q1 is electrically connected with an I/O port of described microprocessor through resistance R 1; A described Photoelectric Detection is to the light-emitting diodes tube anode of pipe Q2 and the phototriode collector is electrically connected to described triode Q1 respectively through R2, R3 collector, and another Photoelectric Detection is to the light-emitting diodes tube anode of pipe Q3 and the phototriode collector is electrically connected to described triode Q1 respectively equally through R4, R5 collector; The input end of described two comparers is electrically connected with the collector of described two Photoelectric Detection to the phototriode of pipe Q2 and Q3 respectively, and the output terminal of this two comparer is electrically connected with two other I/O port of described microprocessor respectively.
Described counter gear has the sampling CD over against described two Photoelectric Detection to the one side of pipe Q2 and Q3, and this sampled light panel surface is by comprising 135 ° of black fan districts, 45 ° of white fan sections, 45 ° of black fan districts and 135 ° of white fan sections clockwise successively.
Compare with prior art, the technique effect of the utility model intellectual water meter is:
1. used circuit is simple, cost is low, the measuring accuracy height of water meter, and the direction of motion of energy identification and counting machine gear.
2. prior art tongue tube (comprising hall device, Wei root device) sensor and inductance type non-magnetic sensor, because can not discern mechanical direction of motion, so when the user with intellectual water meter is anti-when adorning, intellectual water meter is beyond recognition, also can't take necessary prompting or measure to stop, consequently a class takes place illegally usurps phenomenon.The utility model can be avoided this type of defective, when the user with intellectual water meter is anti-when adorning, intellectual water meter can valve-off, cuts off and supplies water, prompting or prevent the user to adopt this type of illegal mounting means.
3. prior art tongue tube (comprising hall device, Wei root device) sensor and inductance type non-magnetic sensor, because can not discern mechanical direction of motion, when causing backwater because of pressure surge on the pipe network, usually cause difference occurring between mechanical counter and the electronic counter, controversial.The utility model can be avoided this type of defective fully, and mechanical counter and electronic counter are consistent, thereby eliminates metering dispute.
Description of drawings
Fig. 1 is the Photoelectric Detection sample circuit schematic diagram of the utility model intellectual water meter;
Fig. 2 is the side schematic views of two Photoelectric Detection of described intellectual water meter to pipe Q2, Q3 and sampling CD position relation;
When Fig. 3 is the counter gear clockwise rotation of described intellectual water meter, the contrast figure of the digital signal of the rotational angle of sampling CD and the output of described comparer;
When Fig. 4 is the counter gear inverse clock rotation of described intellectual water meter, the contrast figure of the digital signal of the rotational angle of sampling CD and the output of described comparer.
Embodiment is described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing.
The utlity model has the intellectual water meter of Photoelectric Detection sample circuit, comprise shell, place movement and circuit board in the shell, described circuit board comprises microprocessor 1, and described movement comprises counter gear 2.Described circuit board also comprises the Photoelectric Detection sample circuit, and as shown in Figure 1 and Figure 2, this Photoelectric Detection sample circuit comprises that two infrared receiving/transmissions of triode Q1, adjacent described counter gear 2 are to pipe Q2 and Q3 and two comparers 3.The base stage of described triode Q1 is electrically connected with the I/O port 3 of described microprocessor 1 through resistance R 1; A described infrared receiving/transmission is to the light emitting diode of pipe Q2 and phototriode is electrically connected to described triode Q1 respectively through R2, R3 collector, and another infrared receiving/transmission is to the light emitting diode of pipe Q3 and phototriode is electrically connected to described triode Q1 respectively equally through R4, R5 collector.The input end of described two comparers 3 is electrically connected with the collector of described two infrared receiving/transmissions to the phototriode of pipe Q2 and Q3 respectively, and the output terminal of this two comparer 3 is electrically connected with the I/O port 4,5 of described microprocessor 1 respectively.
As shown in Figure 3, Figure 4, described counter gear has sampling CD 4 over against described two infrared receiving/transmissions to the one side of pipe Q2 and Q3, and sampling CD 4 surfaces are by comprising 135 ° of black fan districts, 45 ° of white fan sections, 45 ° of black fan districts and 135 ° of white fan sections clockwise successively.
Microprocessor 1 (to call MCU in the following text) regularly sends sampled signal, starts the work of Photoelectric Detection sample circuit, and IC-card water meter counter gear is carried out position probing, enters the low-power consumption working method immediately after detection is finished.Like this, make the bigger Photoelectric Detection sample circuit of power consumption be in intermittent duty, reach the purpose that reduces power consumption.For example: sent detection signal once in per 0.5 second, each detection time, about 0.5ms detected the about 3mA of electric current, and therefore, average extra current is 3 μ A only, reach the intelligence table acceptable level that power consumption is reduced to the disposable battery power supply.
During detection, MCU sends a low level at I/O mouth 3, makes triode Q1 saturation conduction by resistance R 1, for infrared receiving/transmission to the pipe Q
2, Q
3Power supply is provided.Infrared receiving/transmission is to pipe Q
2, Q
3After obtaining power supply, infrarede emitting diode separately is luminous, and infrared light projects sampling CD 4 surfaces of counter gear.
After infrared light projects the white portion on sampling CD 4 surfaces, be reflected to the photosensitive triode of its corresponding infrared receiving/transmission to pipe, make it produce electric current, the collector potential of photosensitive triode drags down, through the end of oppisite phase of comparer A, form the I/O mouth 4 of " 1 " signal conveys after the shaping to MCU.Otherwise infrared light almost completely is absorbed after projecting the black region of sampled light panel surface, reflex to its correspondence photosensitive triode infrared light seldom; Photosensitive triode produces electric current hardly, and its collector potential still keeps high level, forms the I/O mouth 5 that " 0 " signal is sent into MCU behind comparer B.When counter gear rotated with current, the output signal of two comparers 4 was changed between 10,11 01,00, and MCU just can judge the counter moving situation according to state variation.
As shown in Figure 3, the infrared light black of hypersorption almost attached to the shadow region of the sampling CD 4 on the counter gear, nonshaded area the infrared light white of total reflection almost.CD is divided into 8 fan sections by 45 ° of intervals, wherein 3 continuous adjacent fan sections black, then an adjacent fan section of clockwise direction white, and the fan section that back to back clockwise direction is adjacent black, and 3 continuous adjacent fan sections white.When counter gear was in 0 ° of position shown in Figure 3, the state of two comparer outputs was 00; Counter gear turns clockwise 45 ° when being in 45 ° of positions shown in Figure 3, and the state of two comparer outputs is 11.So analogize, shown in 8 positions among Fig. 3, when counter gear turned clockwise, the state of two comparer outputs was gone through 6 kinds of cycle of states such as 00,11,10,00,11,01.Here can notice, when counter gear turns clockwise, the succeeding state of 00 state always 11,01 states succeeding state always 00,10 state succeeding state always the succeeding state of 00,11 state always be not 00.
As shown in Figure 4, when counter gear was rotated counterclockwise, the state of two comparers output was gone through 6 kinds of cycle of states such as 00,01,11,00,10,11.Here can notice that when counter gear was rotated counterclockwise, the succeeding state of 00 state always was not the succeeding state succeeding state succeeding state always 00 of 11,11 states always of 11,10 states always of 11,01 states.
Therefore, counter gear turns clockwise and is rotated counterclockwise and be easy to distinguish.As when state forwards 11 to by 00, can judge that counter gear moves clockwise; When state forwards other states (01 or 10) of non-11 to by 00, can judge that counter gear moves just in the counterclockwise direction.In like manner, when state forwards other states (01 or 10) of non-00 to by 11, can conclude that counter gear moves clockwise; When state forwards 00 state to by 11, can conclude that counter gear moves just in the counterclockwise direction.When state forwards 00 to by 01, can conclude that counter gear moves clockwise; When state forwards 11 to by 01, can conclude that counter gear moves just in the counterclockwise direction.When state forwards 00 to by 10, can conclude that counter gear moves clockwise; When state forwards 11 to by 10, can conclude that counter gear moves just in the counterclockwise direction.Microprocessor MCU can distinguish the direction of motion of counter gear according to this rule, thereby can distinguish the direction of current.
Can also see from above analysis, when state is gone through 11,10/01 another 00 state of arrival by 00, or go through 10/01,00 when arriving another 11 state by 11, counting gear turns clockwise just in time 180 °, at this moment can judge water meter forward water amount be counting gear represent cross half of water unit.Revolve to turn around as counting gear and represent 10 liters of water amounts, then go through when 00 state occurring after the state 00,11,10/01, or go through when 11 states occurring after the state 11,10/01,00, can judge water meter forward cross 5 liters in water.Equally, when MCU detects complete 11,00,01/10,11 status switches of 00,01/10,11,00 a complete status switch or, can judge reverse 5 liters in the water of crossing of water meter.So analogize, MCU just can be converted to electric metering signal exactly with mechanical metering signal, finishes the metering location.
Claims (3)
1. the intellectual water meter with Photoelectric Detection sample circuit comprises shell, places movement and circuit board in the shell, and described circuit board comprises microprocessor (1), and described movement comprises counter gear (2), it is characterized in that:
Described circuit board also comprises the Photoelectric Detection sample circuit, and this Photoelectric Detection sample circuit comprises that two Photoelectric Detection of triode Q1, adjacent described counter gear (2) are to pipe Q2 and Q3 and two comparers (3);
The base stage of described triode Q1 is electrically connected with an I/O port of described microprocessor (1) through resistance R 1; A described Photoelectric Detection is to the light-emitting diodes tube anode of pipe Q2 and the phototriode collector is electrically connected to described triode Q1 respectively through R2, R3 collector, and another Photoelectric Detection is to the light-emitting diodes tube anode of pipe Q3 and the phototriode collector is electrically connected to described triode Q1 respectively equally through R4, R5 collector; The input end of described two comparers (3) is electrically connected with the collector of described two Photoelectric Detection to the phototriode of pipe Q2 and Q3 respectively, and the output terminal of this two comparer (3) is electrically connected with two other I/O port of described microprocessor (1) respectively.
2. the intellectual water meter with Photoelectric Detection sample circuit as claimed in claim 1, it is characterized in that: described counter gear has sampling CD (4) over against described two Photoelectric Detection to the one side of pipe Q2 and Q3, and this sampling CD (4) surface applies 135 ° of black fan districts, 45 ° of white fan sections, 45 ° of black fan districts and 135 ° of white fan sections in the direction of the clock successively.
3. the intellectual water meter with Photoelectric Detection sample circuit as claimed in claim 1 is characterized in that: described two Photoelectric Detection are that infrared receiving/transmission is to pipe to pipe Q2 and Q3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520053985 CN2769855Y (en) | 2005-01-18 | 2005-01-18 | Intelligent watermeter with photoelectric detection sampling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520053985 CN2769855Y (en) | 2005-01-18 | 2005-01-18 | Intelligent watermeter with photoelectric detection sampling circuit |
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| Publication Number | Publication Date |
|---|---|
| CN2769855Y true CN2769855Y (en) | 2006-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520053985 Expired - Lifetime CN2769855Y (en) | 2005-01-18 | 2005-01-18 | Intelligent watermeter with photoelectric detection sampling circuit |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128665A (en) * | 2011-01-29 | 2011-07-20 | 中国计量学院 | Device for detecting accuracy of mechanical water meter |
| CN102829808A (en) * | 2012-08-07 | 2012-12-19 | 连云港杰瑞电子有限公司 | Multi-circle code converter based on mechanical gear set circle count |
| CN104089673A (en) * | 2014-06-19 | 2014-10-08 | 上海安居利智能科技发展有限公司 | Photoelectric coding counter |
| CN104282087A (en) * | 2014-10-30 | 2015-01-14 | 成都龙腾中远信息技术有限公司 | High-precision IC card water meter |
| 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 |
| CN108362349A (en) * | 2018-01-05 | 2018-08-03 | 袁沛兰 | A kind of smart electronics water meter |
| CN109186699A (en) * | 2018-08-15 | 2019-01-11 | 安徽宏远仪表有限公司 | A kind of electronic water meter |
| CN111649793A (en) * | 2020-07-10 | 2020-09-11 | 上海桑锐电子科技股份有限公司 | Water meter and detachable infrared reflection type metering sensing device thereof |
| CN114001787A (en) * | 2020-07-17 | 2022-02-01 | 成都秦川物联网科技股份有限公司 | Double-speed photoelectric sampling method for Internet of things intelligent gas meter |
| CN114018355A (en) * | 2020-07-17 | 2022-02-08 | 成都秦川物联网科技股份有限公司 | Double-speed photoelectric sampling device for intelligent gas meter based on Internet of things |
-
2005
- 2005-01-18 CN CN 200520053985 patent/CN2769855Y/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128665A (en) * | 2011-01-29 | 2011-07-20 | 中国计量学院 | Device for detecting accuracy of mechanical water meter |
| CN102128665B (en) * | 2011-01-29 | 2012-08-22 | 中国计量学院 | Device for detecting accuracy of mechanical water meter |
| CN102829808A (en) * | 2012-08-07 | 2012-12-19 | 连云港杰瑞电子有限公司 | Multi-circle code converter based on mechanical gear set circle count |
| CN102829808B (en) * | 2012-08-07 | 2015-01-07 | 连云港杰瑞电子有限公司 | Multi-circle code converter based on mechanical gear set circle count |
| CN104089673A (en) * | 2014-06-19 | 2014-10-08 | 上海安居利智能科技发展有限公司 | Photoelectric coding counter |
| CN104282087A (en) * | 2014-10-30 | 2015-01-14 | 成都龙腾中远信息技术有限公司 | High-precision IC card water meter |
| 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 |
| CN108362349A (en) * | 2018-01-05 | 2018-08-03 | 袁沛兰 | A kind of smart electronics water meter |
| CN109186699A (en) * | 2018-08-15 | 2019-01-11 | 安徽宏远仪表有限公司 | A kind of electronic water meter |
| CN111649793A (en) * | 2020-07-10 | 2020-09-11 | 上海桑锐电子科技股份有限公司 | Water meter and detachable infrared reflection type metering sensing device thereof |
| CN114001787A (en) * | 2020-07-17 | 2022-02-01 | 成都秦川物联网科技股份有限公司 | Double-speed photoelectric sampling method for Internet of things intelligent gas meter |
| CN114018355A (en) * | 2020-07-17 | 2022-02-08 | 成都秦川物联网科技股份有限公司 | Double-speed photoelectric sampling device for intelligent gas meter based on Internet of things |
| CN114001787B (en) * | 2020-07-17 | 2023-05-05 | 成都秦川物联网科技股份有限公司 | Dual-speed photoelectric sampling method for intelligent gas meter of Internet of things |
| CN114018355B (en) * | 2020-07-17 | 2023-05-09 | 成都秦川物联网科技股份有限公司 | Internet of things intelligent gas meter double-speed photoelectric sampling device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150118 Granted publication date: 20060405 |