CN208688585U - A kind of light pulse sensor of intellectual water meter - Google Patents
A kind of light pulse sensor of intellectual water meter Download PDFInfo
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- CN208688585U CN208688585U CN201821261424.3U CN201821261424U CN208688585U CN 208688585 U CN208688585 U CN 208688585U CN 201821261424 U CN201821261424 U CN 201821261424U CN 208688585 U CN208688585 U CN 208688585U
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Abstract
The utility model provides a kind of light pulse sensor of intellectual water meter, including sensor housing, MCU, wiring board, light emitting diode, optical environment brightness impression element, light-guiding pillar and current-limiting resistance unit；The MCU and wiring board are set to inside sensor housing, and the MCU is fixed in the circuit board；The MCU is connected by current-limiting resistance unit with light emitting diode, and light emitting diode is connected with MCU；The optical environment brightness impression element is connected with MCU；The optical environment brightness impression element spacing is set to the bottom of wiring board；The light-guiding pillar is fixedly arranged on the lower surface of optical environment brightness impression element；The light emitting diode inclination is located at the bottom of wiring board, and light emitting diode is made to be irradiated to the underface that the hot spot on dial plate is located at two light-guiding pillars.The advantages of the utility model: can be greatly reduced overall operation power consumption, and then can meet the requirement that intellectual water meter uses battery powered low-power consumption well.
Description
Technical field
The utility model relates to intellectual water meter field, in particular to the light pulse sensor of a kind of intellectual water meter.
Background technique
In intellectual water meter industry, existing watermeter flowing rate acquisition sensor mainly includes following several types: magnetic strength water
Table sensor, camera shooting direct-reading water meter, LC metal inductive pick-up and light sensation sensor of water meter.Wherein, magnetic strength sensor of water meter
It needs to install magnetic flowing pointer additional in water gauge body；Flow collection equipment needs integrated magnet-sensitive element, for detecting water meter
Flow collection；Therefore, there are following defects for magnetic strength sensor of water meter: needing to install magnetic pointer in water gauge body, to metal
The attractive effect of water gauge body, this will increase the rotational resistance of pointer, influence the performance of water meter.
Camera shooting direct-reading water meter is that backstage is taken pictures and uploaded to by reading of the camera to dial plate, for daemon software
Identification or manual identified, still, using camera shooting direct-reading water meter, there are following defects: image data amount is too big, and network transmission is tired
It is difficult；Higher cost, it is difficult to promote；Camera power is higher, cannot support real-time monitoring, can only substitute artificial regular water-meter reading
Dial plate number, can not real-time monitoring water meter discharge process.
LC metal inductive pick-up needs to install the sheet metal pointer of certain area in water gauge body, and flow collection equipment needs
LC resonance circuit is integrated, when the sheet metal pointer of water meter is rotated to close to LC resonance circuit, will increase the damping of lc circuit,
To change the amplitude of LC resonance waveform, the rotation of indicator of water gauge is differentiated with this, and calculate water meter walks water flow.But
There are following defects for LC metal inductive pick-up: influencing the humorous of LC by then passing through sheet metal pointer close to LC resonance circuit
Vibration wave-shape amplitude, required distance of the sheet metal pointer away from LC resonance circuit is closer, this makes the requirement to water meter structure more severe
It carves, special water gauge body can only be directed to, therefore, versatility is poor.
For light sensation sensor of water meter, cardinal principle is integrated processor, light emitting diode and photosensitive on a sensor
Electronic component sends light by light emitting diode, is absorbed after generating reflection on water meter dial plate by photosensitive electronic component, converted
For electric signal；When due to pointer close to photosensitive electronic component, light or generation to light emitting diode absorb or generate reflection,
So that the luminous intensity sensed on photosensitive electronic component generates variation, to make to export change in electric；Meanwhile by handling
Device determines the rotational trajectory of indicator of water gauge according to the variation of electric signal.It is primarily present following three kinds of light sensation water in the prior art
Table sensor: the first, applying date 2016.06.21, application No. is 201610449360.9 Chinese invention patents to disclose
A kind of list photosensitive type sensor of water meter, there are two light emitting diodes and a photosensitive electronics member for the list photosensitive type sensor of water meter band
Part is alternately shone using two light emitting diodes, and the hot spot that two lumination of light emitting diode generate overlaps；Indicator of water gauge
When in rotary course by isolated area and the overlapping region of hot spot produced by two light emitting diodes, pointer can be determined
Direction of rotation, to identify the positive and negative rotation of water meter.But since the program mainly uses two light emitting diodes alternately to send out
Light, the power consumption of sensor occur mainly on the transmitting light of light emitting diode, therefore, using two light emitting diodes, sensing
The power consumption of device is larger, is unfavorable for the requirement that intellectual water meter uses battery powered low-power consumption.
Second, applying date 2015.11.05, application No. is 201510743251 Chinese invention patents to disclose one
Kind sensor of water meter, the sensor of water meter cooperate two photosensitive electronic components abutted together using a light emitting diode；Two
There is photosensitive region overlapping in part on a photosensitive electronic component hot spot caused by light emitting diode, indicator of water gauge is in rotary course
When the middle photosensitive isolated area for passing through two photosensitive electronic components and overlapping region, the direction of rotation of pointer can be determined, from
And identify the positive and negative rotation of water meter.But two photosensitive electronic components in the program need to be closely packed together, so that there is overlapping
Induction region；Since photosensitive region is smaller, needs to determine indicator of water gauge and rotate to the feeling of independence of two photosensitive electronic components and answer
Region is to judge its direction of rotation, it is desirable to there are higher luminous frequency and processor acquisition process frequency, in order to avoid miss pointer
It reaches induction region and is not sensed by, therefore, the power consumption of the sensor of water meter is also bigger, is unfavorable for intellectual water meter using battery
The requirement of the low-power consumption of power supply.
The third, applying date 2017.08.24, application No. is 201721065902.9 Chinese utility model patent public affairs
A kind of external data pick-up for water meter is opened, in the external data pick-up, photosensitive tube is including side by side and simultaneously
There are four kinds of feelings since the pointer of water meter is smaller in the first photosensitive tube and the second photosensitive tube of row setting when Yao Shixian rotates a circle
Condition is it is necessary to there is the region individually incuded, the region that has again while incuding；This makes in specific implementation, should separate and be laid out
Two photosensitive tubes abut two photosensitive tubes together, so that have while sensing so that respectively induction region is more apparent
The case where, and this be one more contradiction the problem of；Therefore, which requires structure design layout very high, and
Four kinds of states rotate a circle in pointer, and the interior shared time is short, this also requires it to carry out the surface sweeping of high frequency time, to avoid missing
Some state, and high frequency time scanning can greatly improve power consumption；Meanwhile the data pick-up is dry in order to avoid daytime or strong light
It disturbs, must just be run with most bright light emission luminance, signal-to-noise ratio is improved with this, but under night or dark room conditions, also still can
It is run by this light emission luminance, this is also resulted in, and power consumption is larger, is unfavorable for the requirement that intellectual water meter uses battery powered low-power consumption.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of light pulse sensor of intellectual water meter, by this
Overall operation power consumption can be greatly reduced in light pulse sensor, and then can meet intellectual water meter well using battery powered low
The requirement of power consumption.
The utility model is realized in this way: a kind of light pulse sensor of intellectual water meter, the light pulse sensor packet
Include a sensor housing, a MCU, a wiring board, a light emitting diode, two optical environment brightness impression elements, two light-guiding pillars with
An and current-limiting resistance unit；The MCU and wiring board are set to inside the sensor housing, and the MCU is fixed on the line
On the plate of road；The MCU is connected by the current-limiting resistance unit with the anode of the light emitting diode, the light emitting diode
Cathode be connected with the MCU；The two optical environment brightness impression elements are connected with the MCU；
The two optical environment brightness impression element spacings are set to the bottom of the wiring board, and make two optical environments
Brightness impression element is located at the surface at any one place of rotational trajectory of the intellectual water meter hand of dial；It is equal per the light-guiding pillar
It is fixedly arranged on the lower surface of an optical environment brightness impression element；
The light emitting diode is inclined at the bottom of the wiring board, and it is described to be irradiated to the light emitting diode
Hot spot on intellectual water meter dial plate is located at the underface of two light-guiding pillars.
Further, the light pulse sensor further includes a sensor output lead, the sensor output lead
One end is connected with the wiring board, and the other end extends to the outside of the sensor housing.
Further, the current-limiting resistance unit includes at least one first current-limiting resistance and one second current-limiting resistance；Institute
State that MCU passes through first current-limiting resistance respectively and the second current-limiting resistance is connected with the anode of the light emitting diode；Institute
It is different from the resistance value of the second current-limiting resistance to state the first current-limiting resistance.
Further, the current-limiting resistance unit includes one first current-limiting resistance, one second current-limiting resistance, a third current limliting
Resistance, one the 4th current-limiting resistance and one the 5th current-limiting resistance；The MCU passes through first current-limiting resistance, the second limit respectively
Leakage resistance, third current-limiting resistance, the 4th current-limiting resistance and the 5th current-limiting resistance are connected with the anode of the light emitting diode；
The resistance value of first current-limiting resistance, the second current-limiting resistance, third current-limiting resistance, the 4th current-limiting resistance and the 5th current-limiting resistance
It is all different.
Further, the light-guiding pillar is the light-guiding pillar on convex surface.
Further, the light emitting diode is the light emitting diode of 550 nano wave lengths.
Further, the MCU uses PIC16F1559 chip.
Further, the optical environment brightness impression element uses ISL29006 chip.
Utility model has the advantages that 1, using tool there are two independent ADC (analog-to-digital conversion) channel low-power consumption
PIC16F1559 chip can carry out ADC to the electric signal of two optical environment brightness impression element outputs simultaneously and turn as MCU
It changes, so as to reduce the runing time of MCU, and reduces the overall operation power consumption of light pulse sensor, and then can meet well
Intellectual water meter uses the requirement of battery powered low-power consumption；
2, light-guiding pillar of the installation with convex design on optical environment brightness impression element, can increase actual induction face
Product enables optical environment brightness impression element to sense bigger regional scope, and such hand of dial is by the region
Time is with regard to long, so that can guarantee is reducing the luminous frequency of light emitting diode and adopting to optical environment brightness impression element
In the case where sample frequency, the state that hand of dial reaches the region also can be correctly captured, this also contributes to reducing light pulse
The overall operation power consumption of sensor, and then the requirement that intellectual water meter uses battery powered low-power consumption can be met well；
3, with the function of automatically adjusting lumination of light emitting diode brightness according to ambient brightness, light pulse can be further decreased
The power consumption of sensor, and then the requirement that intellectual water meter uses battery powered low-power consumption can be met well.Specific implementation process
Be: MCU connects light emitting diode by the current-limiting resistance unit of a variety of different resistance values；At work, MCU passes through optical environment
Electric signal on brightness impression element, can determine the size of ambient brightness, and the corresponding current-limiting resistance of reselection is sent out to control
Optical diode shines；Since there are certain fluctuations for ambient brightness, when ambient brightness is bigger, MCU just controls small resistance value
Current-limiting resistance makes lumination of light emitting diode, to improve light emission luminance, increases signal-to-noise ratio；When ambient brightness is smaller, MCU is just controlled
The current-limiting resistance of big resistance value makes lumination of light emitting diode, suitably to reduce the light emission luminance of light emitting diode, such as darker
In control cabinet, the operation brightness of light emitting diode can be reduced, to further decrease power consumption；
4, cleverly using the color difference of the hand of dial of mechanical water meter itself and dial plate, according to different colours to light
The different principle of degree of reflection is absorbed to detect the rotation status of hand of dial, and acquires the real-time traffic of water meter；Compared to magnetic
Inductive pick-up and LC metal inductive pick-up, this practical new light pulse sensor do not need to install intellectual water meter specific
Pointer, therefore, strong applicability is particluarly suitable for the occasions such as old table transformation and uses；
5, using the light emitting diode of 550 highlighted nano wave lengths, and light emitting diode uses the peace with constant slope
Installing meter, so that the hot spot being radiated on dial plate is in the underface of optical environment brightness impression element, it is possible to increase the flux of light,
The signal-to-noise ratio with ambient brightness is improved, and the accuracy and reliability of acquisition can be improved in turn.
Detailed description of the invention
The utility model is further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is a kind of structural schematic diagram of the light pulse sensor of intellectual water meter of the utility model.
Fig. 2 is a kind of circuit diagram of the light pulse sensor of intellectual water meter of the utility model.
Fig. 3 is the induction schematic diagram of the utility model two optical environment brightness impression elements in hand of dial rotation.
Specific embodiment
Please emphasis referring to figs. 1 to shown in Fig. 3, a kind of light pulse sensor 100 of intellectual water meter of the utility model, the light
Pulse transducer 100 includes a sensor housing 1, a MCU2, a wiring board 3, a light emitting diode 4, two optical environment brightness
Sensing element A, B, two light-guiding pillars 51,52 and a current-limiting resistance unit 6；The MCU2 and wiring board 3 are set to the sensing
Inside device shell 1, the MCU2 is fixed on the wiring board 3, specifically can be by the upper surface of the fixed assist side 3 of MCU2；
The MCU2 is connected by the current-limiting resistance unit 6 with the anode of the light emitting diode 4, the light emitting diode 4
Cathode is connected with the MCU2, in the specific implementation, can control light emitting diode 4 by the current-limiting resistance unit 6
Light emission luminance, and resistance value is bigger, and 4 light emission luminance of light emitting diode is darker, and resistance value is smaller, and 4 light emission luminance of light emitting diode is got over
It is bright；Two described optical environment brightness impression element A, B are connected with the MCU2, the optical environment brightness impression element A
(B) for the optical signal sensed to be converted to electric signal；
Two optical environment brightness impression element A, B spacing are set to the bottom of the wiring board 3, and make two optics
Ambient brightness sensing element A, B be located at any one place of rotational trajectory of the intellectual water meter (not shown) hand of dial 7 just on
Side；The lower surface of an optical environment brightness impression element A (B) is fixedly arranged on per the light-guiding pillar 51 (52)；It is described to shine
Diode 4 is inclined at the bottom of the wiring board 3, and the light emitting diode 4 is made to be irradiated to the intellectual water meter dial plate 8
On hot spot be located at the underfaces of two light-guiding pillars 51,52, so as to increase the flux of light, improve the noise with ambient brightness
Than.In the specific implementation, the light that light emitting diode 4 issues can be irradiated on the dial plate 8 of intellectual water meter and generate hot spot, hot spot
Light can be reflected on light-guiding pillar 51 (52) again, and by light-guiding pillar 51 (52) light conduction of reflection is bright to optical environment
It spends sensing element A (B), the optical signal sensed can be converted to electric signal and sent to by optical environment brightness impression element A (B)
MCU2, in this way, MCU2 can calculate the light that dial plate 8 is emitted when light emitting diode 4 shines by electric signal based on the received
Intensity value.
The light pulse sensor 100 further includes a sensor output lead 9, one end of the sensor output lead 9
It is connected with the wiring board 3, the other end extends to the outside of the sensor housing 1, by prolonging sensor output lead 9
The outside of sensor housing 1 is reached, it can very convenient carry out wiring.
The current-limiting resistance unit 6 includes at least one first current-limiting resistance R1 and one second current-limiting resistance R2；It is described
MCU2 passes through the first current-limiting resistance R1 respectively and the second current-limiting resistance R2 is connected with the anode of the light emitting diode 4
It connects；The first current-limiting resistance R1 is different from the resistance value of the second current-limiting resistance R2, in the specific implementation, can pass through the first current limliting
Resistance R1 and the second current-limiting resistance R2 automatically adjusts the light emission luminance of light emitting diode 4, reduces light emitting diode 4 to reach and transports
Row brightness, the purpose for reducing operation power consumption.
In order to realize that the light emission luminance to light emitting diode 4 is preferably adjusted, to further decrease operation power consumption, institute
Stating current-limiting resistance unit 6 includes one first current-limiting resistance R1, one second current-limiting resistance R2, a third current-limiting resistance R3, one the 4th
Current-limiting resistance R4 and one the 5th current-limiting resistance R5；The MCU2 passes through the first current-limiting resistance R1, the second current limliting electricity respectively
Hinder the positive phase of R2, third current-limiting resistance R3, the 4th current-limiting resistance R4 and the 5th current-limiting resistance R5 and the light emitting diode 4
Connection；The first current-limiting resistance R1, the second current-limiting resistance R2, third current-limiting resistance R3, the 4th current-limiting resistance R4 and the 5th
The resistance value of current-limiting resistance R5 is all different, in this way, in the specific implementation, so that it may according to the first current-limiting resistance R1, the second current limliting
Resistance R2, third current-limiting resistance R3, the 4th current-limiting resistance R4 and the 5th current-limiting resistance R5 automatically adjust light emitting diode 4
Light emission luminance.
The light-guiding pillar 51 (52) is that the light-guiding pillar on convex surface can increase actual induction area, make by using convex design
Bigger regional scope can be sensed by obtaining optical environment brightness impression element A (B), and such hand of dial 7 is by the region
Time is with regard to long, to can guarantee in the luminous frequency of reduction light emitting diode 4 and to optical environment brightness impression element A
(B) in the case where sample frequency, the state that hand of dial 7 reaches the region also can correctly be captured.
The light emitting diode 4 is the light emitting diode of 550 nano wave lengths, by using 550 highlighted nano wave lengths
Light emitting diode, and light emitting diode 4 uses the mounting design with constant slope, so that at the hot spot being radiated on dial plate 8
In the underface of optical environment brightness impression element A (B), it is possible to increase the flux of light improves the signal-to-noise ratio with ambient brightness.
The MCU2 uses PIC16F1559 chip, and by using tool, there are two the low of independent ADC (analog-to-digital conversion) channel
Power consumption PIC16F1559 chip makes it possible to simultaneously as MCU2 to the electricity of two optical environments brightness impression element A, B output
Signal carries out ADC conversion, so as to reduce the runing time of MCU2, and reduces the overall operation power consumption of light pulse sensor 100.
The optical environment brightness impression element A (B) uses ISL29006 chip, which has low-power consumption
The characteristics of.
The working principle of the utility model is as follows:
Light emitting diode 4 is controlled by MCU2 and is in non-light emitting state, at this point, environment light passes through two light-guiding pillars 51,52
It is transmitted on two optical environment brightness impression elements A, B, optical environment brightness impression element A (B) converts optical signals to electricity
The ADC interface of MCU2 is transferred to after signal；Sampling of the MCU2 to ambient brightness is obtained after the electric signal progress ADC conversion received
Value, MCU2 control the first current-limiting resistance R1, the second current-limiting resistance R2, third according to the size of the ambient brightness sampled value obtained and limit
Resistance conducting in leakage resistance R3, the 4th current-limiting resistance R4 and the 5th current-limiting resistance R5, and constituted with light emitting diode 4
Closed circuit makes light emitting diode 4 issue light, since light emitting diode 4 is installed by certain gradient, the light launched
In line meeting oblique illumination to the dial plate 8 of intellectual water meter, and one is generated in the underface of two optical environment brightness impression elements A, B
A hot spot.The light of 8 flare of dial plate, and pass through two light-guiding pillars 51,52 for the light conduction of reflection to two optics rings
On border brightness impression element A, B, optical environment brightness impression element A (B) can convert optical signals to electric signal and be transferred to
The ADC interface of MCU2；MCU2 sends out dial plate 8 when showing that light emitting diode 4 shines after the electric signal progress ADC conversion received
The bright intensity penetrated.
When the hand of dial 7 of intellectual water meter rotates to the lower section of light-guiding pillar 51 (52), coloured hand of dial 7 can be inhaled
Receive a part of light；And when hand of dial 7 does not rotate to the lower section of light-guiding pillar 51 (52), white dial plate 8 can then reflect
Most of light is irradiated to dial plate 8 and is reflected into optical environment brightness impression member it follows that light emitting diode 4 issues light
The bright intensity value of part A (B) with to be irradiated to the bright intensity value difference that hand of dial 7 is reflected larger；Therefore, MCU2 is according to light
Bright intensity difference is it may determine that whether hand of dial 7 rotates to the lower section of optical environment brightness impression element A (B) out.Meanwhile
Since light-guiding pillar 51 (52) uses convex design, so that it is with focusing function, in this way, when hand of dial 7 is not also fully rotating
When to the lower section of light-guiding pillar 51 (52), it will be able to the light quantity for influencing light-guiding pillar 51 (52) conduction, that is, optical environment brightness
The region that sensing element A (B) can incude is larger, and hand of dial 7 has in rotary course at the long period in induction region,
Therefore, it can effectively reduce the frequency acquisition of MCU2, by the light pulse sensor 100 of the utility model so as to reduce function
Consumption.
Simultaneously as there are two optical environment brightness impression element A, B for setting, as shown in figure 3, when hand of dial 7 rotates
When to close to optical environment brightness impression element A, optical environment brightness impression element A can export the value after bright Strength Changes；
When hand of dial 7 rotates between optical environment brightness impression element A and optical environment brightness impression element B, optical environment
Brightness impression element A and optical environment brightness impression element B can export the value after bright Strength Changes；When hand of dial 7 revolves
When going to close to optical environment brightness impression element B and separate optical environment brightness impression element A, optical environment brightness impression member
Part B can export the value after bright Strength Changes, and optical environment brightness impression element A can then restore normal value.Therefore, pass through light
The different variations sequence for learning ambient brightness sensing element A and optical environment brightness impression element B state can be accurately judged to
Hand of dial 7 is to rotate forward or invert, i.e., if state change sequence is A-AB-B, illustrates that hand of dial 7 is to rotate forward；Such as
Fruit state change sequence is B-BA-A, then illustrates that hand of dial 7 is reversion.
In conclusion the utility model has the advantages that
1, using tool there are two independent ADC (analog-to-digital conversion) channel low-power consumption PIC16F1559 chip as MCU, can
ADC conversion is carried out to the electric signal of two optical environment brightness impression elements output simultaneously, when operation so as to reduce MCU
Between, and the overall operation power consumption of light pulse sensor is reduced, and then intellectual water meter can be met well using battery powered low
The requirement of power consumption；
2, light-guiding pillar of the installation with convex design on optical environment brightness impression element, can increase actual induction face
Product enables optical environment brightness impression element to sense bigger regional scope, and such hand of dial is by the region
Time is with regard to long, so that can guarantee is reducing the luminous frequency of light emitting diode and adopting to optical environment brightness impression element
In the case where sample frequency, the state that hand of dial reaches the region also can be correctly captured, this also contributes to reducing light pulse
The overall operation power consumption of sensor, and then the requirement that intellectual water meter uses battery powered low-power consumption can be met well；
3, with the function of automatically adjusting lumination of light emitting diode brightness according to ambient brightness, light pulse can be further decreased
The power consumption of sensor, and then the requirement that intellectual water meter uses battery powered low-power consumption can be met well.Specific implementation process
Be: MCU connects light emitting diode by the current-limiting resistance unit of a variety of different resistance values；At work, MCU passes through optical environment
Electric signal on brightness impression element, can determine the size of ambient brightness, and the corresponding current-limiting resistance of reselection is sent out to control
Optical diode shines；Since there are certain fluctuations for ambient brightness, when ambient brightness is bigger, MCU just controls small resistance value
Current-limiting resistance makes lumination of light emitting diode, to improve light emission luminance, increases signal-to-noise ratio；When ambient brightness is smaller, MCU is just controlled
The current-limiting resistance of big resistance value makes lumination of light emitting diode, suitably to reduce the light emission luminance of light emitting diode, such as darker
In control cabinet, the operation brightness of light emitting diode can be reduced, to further decrease power consumption；
4, cleverly using the color difference of the hand of dial of mechanical water meter itself and dial plate, according to different colours to light
The different principle of degree of reflection is absorbed to detect the rotation status of hand of dial, and acquires the real-time traffic of water meter；Compared to magnetic
Inductive pick-up and LC metal inductive pick-up, this practical new light pulse sensor do not need to install intellectual water meter specific
Pointer, therefore, strong applicability is particluarly suitable for the occasions such as old table transformation and uses；
5, using the light emitting diode of 550 highlighted nano wave lengths, and light emitting diode uses the peace with constant slope
Installing meter, so that the hot spot being radiated on dial plate is in the underface of optical environment brightness impression element, it is possible to increase the flux of light,
The signal-to-noise ratio with ambient brightness is improved, and the accuracy and reliability of acquisition can be improved in turn.
Although those familiar with the art answers the foregoing describe specific embodiment of the present utility model
Working as understanding, we are merely exemplary described specific embodiment, rather than for the limit to the scope of the utility model
Fixed, those skilled in the art modification and variation equivalent made by the spirit according to the utility model all should
Cover in the scope of the claimed protection of the utility model.
Claims (8)
1. a kind of light pulse sensor of intellectual water meter, including a sensor housing, a MCU and a wiring board；The MCU and
Wiring board is set to inside the sensor housing, and the MCU is fixed on the wiring board；It is characterized by also including one
Light emitting diode, two optical environment brightness impression elements, two light-guiding pillars and a current-limiting resistance unit；The MCU passes through described
Current-limiting resistance unit is connected with the anode of the light emitting diode, and the cathode of the light emitting diode is connected with the MCU；
The two optical environment brightness impression elements are connected with the MCU；
The two optical environment brightness impression element spacings are set to the bottom of the wiring board, and make the two optical environment brightness
Sensing element is located at the surface at any one place of rotational trajectory of the intellectual water meter hand of dial；It is fixed per the light-guiding pillar
In the lower surface of an optical environment brightness impression element；
The light emitting diode is inclined at the bottom of the wiring board, and the light emitting diode is made to be irradiated to the intelligence
Hot spot on water meter dial plate is located at the underface of two light-guiding pillars.
2. a kind of light pulse sensor of intellectual water meter as described in claim 1, it is characterised in that: further include that a sensor is defeated
Lead out, one end of the sensor output lead are connected with the wiring board, and the other end extends to the sensor housing
Outside.
3. a kind of light pulse sensor of intellectual water meter as described in claim 1, it is characterised in that: the current-limiting resistance unit
Including at least one first current-limiting resistance and one second current-limiting resistance；The MCU pass through respectively first current-limiting resistance and
Second current-limiting resistance is connected with the anode of the light emitting diode；The resistance value of first current-limiting resistance and the second current-limiting resistance
It is different.
4. a kind of light pulse sensor of intellectual water meter as described in claim 1, it is characterised in that: the current-limiting resistance unit
Including one first current-limiting resistance, one second current-limiting resistance, a third current-limiting resistance, one the 4th current-limiting resistance and one the 5th current limliting
Resistance；The MCU respectively by first current-limiting resistance, the second current-limiting resistance, third current-limiting resistance, the 4th current-limiting resistance with
And the 5th current-limiting resistance be connected with the anode of the light emitting diode；First current-limiting resistance, the second current-limiting resistance, third
The resistance value of current-limiting resistance, the 4th current-limiting resistance and the 5th current-limiting resistance is all different.
5. a kind of light pulse sensor of intellectual water meter as described in claim 1, it is characterised in that: the light-guiding pillar is convex surface
Light-guiding pillar.
6. a kind of light pulse sensor of intellectual water meter as described in claim 1, it is characterised in that: the light emitting diode is
The light emitting diode of 550 nano wave lengths.
7. a kind of light pulse sensor of intellectual water meter as described in claim 1, it is characterised in that: the MCU is used
PIC16F1559 chip.
8. a kind of light pulse sensor of intellectual water meter as described in claim 1, it is characterised in that: the optical environment brightness
Sensing element uses ISL29006 chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821261424.3U CN208688585U (en) | 2018-08-07 | 2018-08-07 | A kind of light pulse sensor of intellectual water meter |
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| CN201821261424.3U CN208688585U (en) | 2018-08-07 | 2018-08-07 | A kind of light pulse sensor of intellectual water meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759945A (en) * | 2018-08-07 | 2018-11-06 | 智恒科技股份有限公司 | A kind of light pulse sensor of intellectual water meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759945A (en) * | 2018-08-07 | 2018-11-06 | 智恒科技股份有限公司 | A kind of light pulse sensor of intellectual water meter |
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