CN114018355B - Internet of things intelligent gas meter double-speed photoelectric sampling device - Google Patents
Internet of things intelligent gas meter double-speed photoelectric sampling device Download PDFInfo
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- CN114018355B CN114018355B CN202010691965.5A CN202010691965A CN114018355B CN 114018355 B CN114018355 B CN 114018355B CN 202010691965 A CN202010691965 A CN 202010691965A CN 114018355 B CN114018355 B CN 114018355B
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- 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
- G01F15/07—Integration to give total flow, e.g. using mechanically-operated integrating mechanism
- G01F15/075—Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means
- G01F15/0755—Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means involving digital counting
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- 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
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Abstract
The invention relates to a double-speed photoelectric sampling device of an intelligent gas meter of the Internet of things, which comprises a base meter, wherein the base meter is provided with a rotary coding disc, an inner ring for intermittently cutting off a passage between a transmitting end of a light-emitting diode (LED 1) and a receiving end of a photosensitive diode (PD 1) is arranged on the coding disc, an outer ring for intermittently cutting off a passage between a transmitting end of a light-emitting diode (LED 2) and the receiving end of the photosensitive diode (PD 2) is also arranged on the coding disc, and the dividing ratio of the outer ring to the inner ring is N1; the photosensitive diode PD1 receives infrared rays of the light emitting diode LED1, converts the infrared rays into electric signals and feeds the electric signals back to the MCU controller; the photosensitive diode PD2 receives infrared rays of the light emitting diode LED2, converts the infrared rays into electric signals and feeds the electric signals back to the MCU controller. The code disc has two graduation values, the count value of the rapid pulse signal is used as the input signal value of the metering unit, the resolution ratio of the rapid pulse is higher, and the requirement of high display resolution ratio in a test mode is met.
Description
Technical Field
The invention relates to the technical field of intelligent gas meters of the Internet of things, in particular to a double-speed photoelectric sampling device of the intelligent gas meter of the Internet of things.
Background
Along with the improvement of informatization, intellectualization and science and technology level in China, the intelligent metering technology is widely applied to gas meters, and along with the continuous development and progress of society, the status and effect of the natural gas in the development of the modern society and the life of residents are more and more important; along with large-scale popularization and application of urban pipelines, the application of gas meters is deep to thousands of households, along with the expansion of urban scale, the requirements of gas companies on gas meter monitoring and gas consumption big data analysis are met, along with the gradual development of intelligent cloud services, internet of things industry and technology, the application of Internet of things technology in intelligent gas meters is also increasing.
The sampling and counting of the gas meter mainly comprises a reed pipe, a Hall switch sensor and a photoelectric encoder at present, wherein the reed pipe, the Hall switch and the photoelectric encoder all belong to magnetic elements, and metering failure occurs under the condition of external strong magnetic field interference.
The traditional gas meter uses mechanical display as a main display and an electronic counter as an auxiliary display. The double display of the mechanical and electronic display not only causes serious resource waste, but also brings great trouble to users, for example, when the electronic display and the mechanical display are inconsistent, the following marks are displayed on a common gas meter, and the mechanical display is the priority. "if it is a non-gas metering industry practitioner, it is difficult to understand the meaning of such an identification.
The traditional intelligent diaphragm gas meter electronic counter is based on electromechanical conversion of a mechanical counter, the accuracy of the electronic counter depends on the mechanical counter, the resolution of electronic display is 10L in the case of a civil meter, and the requirements of networking and informatization of the gas meter necessarily require the electronic counter (display) to achieve higher accuracy and resolution.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide the double-speed photoelectric sampling device of the intelligent gas meter of the Internet of things, which has two graduation values through the coding disc, takes the count value of a rapid pulse signal as the input signal value of a metering unit, has higher resolution of the rapid pulse, and meets the requirement of high display resolution in a test mode.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows.
The double-speed photoelectric sampling device of the intelligent gas meter of the Internet of things comprises a base meter, wherein the base meter is provided with a rotary coding disc, an inner ring for intermittently cutting off a passage between a transmitting end of a light-emitting diode (LED 1) and a receiving end of a photosensitive diode (PD 1) is arranged on the coding disc, an outer ring for intermittently cutting off a passage between a transmitting end of a light-emitting diode (LED 2) and the receiving end of the photosensitive diode (PD 2) is also arranged on the coding disc, and the dividing ratio of the outer ring to the inner ring is N1;
the photosensitive diode PD1 receives infrared rays of the light emitting diode LED1, converts the infrared rays into electric signals and feeds the electric signals back to the MCU controller;
the photosensitive diode PD2 receives infrared rays of the light emitting diode LED2, converts the infrared rays into electric signals and feeds the electric signals back to the MCU controller.
The base table is provided with a coding disc, a bracket, a circuit board and a connector;
the coding disc is provided with an outer ring and an inner ring which are concentric with each other, and the indexing ratio of the outer ring to the inner ring is N1;
the support is fixedly connected with a circuit board, a photoelectric assembly is arranged on the circuit board, the photoelectric assembly comprises a photoelectric assembly A and a photoelectric assembly B, the photoelectric assembly A corresponds to the outer ring, and the photoelectric assembly B corresponds to the inner ring;
the connector is connected with an MCU controller.
The photoelectric assembly A comprises a light emitting diode (LED 2) and a photo diode (PD 2), wherein the anode of the LED2 is connected with the cathode of the photo diode (PD 2) and then is respectively connected with a voltage VCC and the collector of a triode (Q2), the emitter of the triode (Q2) is respectively connected with one end of a resistor (R22) and the ground, the other end of the resistor (R22) is respectively connected with the base of the triode (Q2) and the anode of the photo diode (PD 2), the collector of the triode (Q2) is connected with an MCU controller through a GPI-2 interface, and the cathode of the LED (LED 2) is connected with the MCU controller through a GP0-2 interface.
The light emitting diode LED2 and the photosensitive diode PD2 are oppositely arranged, the outer ring is in a half-ring shape, and the outer ring rotates along with the coding disc to intermittently cut off a passage between the emitting end of the light emitting diode LED2 and the receiving end of the photosensitive diode PD 2.
The photoelectric component B comprises a light emitting diode LED1 and a photodiode PD1, wherein the anode of the light emitting diode LED1 is connected with the cathode of the photodiode PD1 and then is respectively connected with a voltage VCC and the collector of a triode Q1, the emitter of the triode Q1 is respectively connected with one end of a resistor R12 and the ground, the other end of the resistor R12 is respectively connected with the base of the triode Q1 and the anode of the photodiode PD1, the collector of the triode Q1 is connected with an MCU controller through a GPI-1 interface, and the cathode of the light emitting diode LED1 is connected with the MCU controller through a GP0-1 interface.
The light emitting diode LED1 and the photodiode PD1 are oppositely arranged, the inner ring is in six evenly distributed arc shapes, and the inner ring rotates along with the coding disc to intermittently cut off a passage between the emitting end of the light emitting diode LED1 and the receiving end of the photodiode PD 1.
A double-speed photoelectric sampling method for a gas meter is characterized in that: the method comprises the following steps:
p1, driving the coding disc to rotate by the fuel gas;
p2, main pulse signal: when the inner ring rotates along with the coding disc, the inner ring cuts off a passage between the emitting end of the light emitting diode LED1 and the receiving end of the photo diode PD1, when the inner ring cuts off the passage, the photo diode PD1 cannot receive light of the light emitting diode LED1, the light emitting diode LED1 is disconnected, the base electrode of the triode Q1 has no voltage, the triode Q1 is disconnected, the collector electrode of the triode Q1 is high voltage, a signal received at the GPI-1 interface is high level, when the inner ring does not cut off the passage, the photo diode PD1 can receive the light of the light emitting diode LED1, the light emitting diode LED1 is conducted to provide voltage for the base electrode of the triode Q1, the triode Q1 is conducted, the collector electrode of the triode Q1 is low voltage, and the MCU controller is low level through the signal received at the GPI-1 interface;
p3, auxiliary pulse signal: in the step P2, the outer ring rotates along with the encoding ring to cut off a path between the emitting end of the light emitting diode LED2 and the receiving end of the photo diode PD2, when the outer ring cuts off the path, the photo diode PD2 cannot receive light of the light emitting diode LED2, the light emitting diode LED2 is disconnected, the base electrode of the triode Q2 has no voltage, the triode Q2 is disconnected, the collector electrode of the triode Q2 is high voltage, a signal received at the GPI-2 interface is high level, when the outer ring does not cut off the path, the photo diode PD2 can receive light of the light emitting diode LED2, the light emitting diode LED2 is conducted to provide voltage for the base electrode of the triode Q2, the collector electrode of the triode Q2 is low voltage, and a signal received at the MCU controller through the GPI-2 interface is low level;
p4, the indexing ratio of the outer ring to the inner ring is 6:1, when the coding disc rotates for one circle, the outer ring outputs 6 pulses, the inner ring outputs 1 pulse, and the outer ring can measure the indexing of 0.1L.
The beneficial effects of this application are.
1. The main pulse is a slow sampling pulse and the pulse equivalent is the movement revolution volume through two acquisition modes of a main pulse signal and an auxiliary pulse signal; the auxiliary pulse is high-speed pulse, the pulse equivalent is 6 times of the revolution volume, two different acquisition resolutions are realized, the count value of the rapid pulse signal is used as the input signal value of the metering unit, the resolution of the rapid pulse is higher, and the requirement of high display resolution in a test mode is met.
2. The problem of magnetic interference is solved through photoelectric sampling; the average power consumption is reduced by a sampling method of a pulse excitation light source; two different sampling resolutions are realized by adopting double-speed sampling, the slow pulse is taken as a metering unit input signal by sampling in a working mode, the lower sampling frequency is used, the awakening frequency of an MCU controller is reduced, and the power consumption is reduced; the rapid pulse is adopted as an input signal of the metering unit in the test mode, so that the requirement of higher display resolution is met by using a faster sampling frequency.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural diagram of an optoelectronic component and a coding disc in the present invention.
Fig. 3 is a schematic structural diagram of a coding disc in the present invention.
Fig. 4 is a schematic perspective view of a coding disc according to the present invention.
Fig. 5 is a schematic diagram of the circuit connection of the present invention.
FIG. 6 is a chart showing the output frequencies of the flow pulses according to the present invention.
The reference numerals in the figures are: 1. base table 2, coding disc, 3, support, 4, photoelectric assembly, 5, circuit board, 6, connector, 7, outer lane, 8, inner circle, 9, photoelectric assembly A,10, photoelectric assembly B.
Detailed Description
As shown in fig. 1 to 4, the dual-speed photoelectric sampling device of the intelligent gas meter of the internet of things comprises a base table 1, wherein the base table 1 is provided with a rotary coding disc 2, an inner ring 8 for intermittently cutting off a passage between an emitting end of a light emitting diode (LED 1) and a receiving end of a photosensitive diode (PD 1) is arranged on the coding disc 2, an outer ring 7 for intermittently cutting off a passage between the emitting end of the light emitting diode (LED 2) and the receiving end of the photosensitive diode (PD 2) is also arranged on the coding disc 2, and the indexing ratio of the outer ring 7 to the inner ring 8 is N1;
the photosensitive diode PD1 receives infrared rays of the light emitting diode LED1, converts the infrared rays into electric signals and feeds the electric signals back to the MCU controller;
the photosensitive diode PD2 receives infrared rays of the light emitting diode LED2, converts the infrared rays into electric signals and feeds the electric signals back to the MCU controller.
The base table 1 is provided with a coding disc 2, a bracket 3, a circuit board 5 and a connector 6;
the coding disc 2 is provided with an outer ring 7 and an inner ring 8 which are concentric with each other, and the indexing ratio of the outer ring 7 to the inner ring 8 is N1;
the support 3 is fixedly connected with the circuit board 5, the circuit board 5 is provided with a photoelectric component 4, the photoelectric component 4 comprises a photoelectric component A9 and a photoelectric component B10, the photoelectric component A9 corresponds to the outer ring 7, and the photoelectric component B10 corresponds to the inner ring 8;
the connector 6 is connected with an MCU controller.
As shown in fig. 5, the photoelectric component A9 includes a light emitting diode LED2 and a photodiode PD2, wherein an anode of the light emitting diode LED2 is connected with a cathode of the photodiode PD2, and then is connected with a voltage VCC and a collector of a triode Q2, an emitter of the triode Q2 is connected with one end of a resistor R22 and ground, another end of the resistor R22 is connected with a base of the triode Q2 and an anode of the photodiode PD2, a collector of the triode Q2 is connected with an MCU controller through a GPI-2 interface, and a cathode of the light emitting diode LED2 is connected with the MCU controller through a GP0-2 interface.
The Light Emitting Diode (LED) 2 is arranged opposite to the photosensitive diode (PD 2), the outer ring 7 is in a half-ring shape, and the outer ring 7 rotates along with the coding disc 2 to cut off a passage between the emitting end of the Light Emitting Diode (LED) 2 and the receiving end of the photosensitive diode (PD 2) intermittently.
The photoelectric component B10 comprises a light emitting diode LED1 and a photodiode PD1, wherein the anode of the light emitting diode LED1 is connected with the cathode of the photodiode PD1 and then is respectively connected with a voltage VCC and the collector of a triode Q1, the emitter of the triode Q1 is respectively connected with one end of a resistor R12 and the ground, the other end of the resistor R12 is respectively connected with the base of the triode Q1 and the anode of the photodiode PD1, the collector of the triode Q1 is connected with an MCU controller through a GPI-1 interface, and the cathode of the light emitting diode LED1 is connected with the MCU controller through a GP0-1 interface.
The light emitting diode LED1 is arranged opposite to the photodiode PD1, the inner ring 8 has six arc shapes which are uniformly distributed, and the inner ring 8 rotates along with the encoding disk 2 to cut off the passage between the emitting end of the light emitting diode LED1 and the receiving end of the photodiode PD1 intermittently.
A double-speed photoelectric sampling method for a gas meter is characterized in that: the method comprises the following steps:
p1, the fuel gas drives the coding disc 2 to rotate;
p2, main pulse signal: when the inner ring 8 rotates along with the coding disc 2, when the inner ring 8 cuts off a passage between the emitting end of the light emitting diode LED1 and the receiving end of the photo diode PD1, the photo diode PD1 cannot receive light of the light emitting diode LED1, the light emitting diode LED1 is disconnected, the base electrode of the triode Q1 has no voltage, the triode Q1 is disconnected, the collector electrode of the triode Q1 is high voltage, a signal received at the GPI-1 interface is high level, when the inner ring 8 does not cut off the passage, the photo diode PD1 can receive light of the light emitting diode LED1, the light emitting diode LED1 is conducted to provide voltage for the base electrode of the triode Q1, the triode Q1 is conducted, the collector electrode of the triode Q1 is low voltage, and the MCU controller is low level through the signal received at the GPI-1 interface;
p3, auxiliary pulse signal: in the step P2, the outer ring 7 rotates along with the encoding disk 2 to cut off a passage between an emitting end of the light emitting diode LED2 and a receiving end of the photo diode PD2, when the outer ring 7 cuts off the passage, the photo diode PD2 cannot receive light of the light emitting diode LED2, the light emitting diode LED2 is disconnected, a base electrode of the triode Q2 has no voltage, the triode Q2 is disconnected, a collector electrode of the triode Q2 has high voltage, a signal received at a GPI-2 interface is high level, when the outer ring 7 does not cut off the passage, the photo diode PD2 can receive light of the light emitting diode LED2, the light emitting diode LED2 is conducted to provide voltage for the base electrode of the triode Q2, the triode Q2 is conducted, the collector electrode of the triode Q2 has low voltage, and an MCU controller receives the signal at the GPI-2 interface to have low level;
p4, the indexing ratio of the outer ring 7 to the inner ring 8 is 6:1, when the coding disc 2 rotates for one circle, the outer ring 7 outputs 6 pulses, the inner ring 8 outputs 1 pulse, and the outer ring 7 can measure the indexing of 0.1L.
The main pulse is a slow sampling pulse and the pulse equivalent is the movement revolution volume through two acquisition modes of a main pulse signal and an auxiliary pulse signal; the auxiliary pulse is high-speed pulse, the pulse equivalent is 6 times of the revolution volume, two different acquisition resolutions are realized, the count value of the rapid pulse signal is used as the input signal value of the metering unit, the resolution of the rapid pulse is higher, and the requirement of high display resolution in a test mode is met.
The problem of magnetic interference is solved through photoelectric sampling; the average power consumption is reduced by a sampling method of a pulse excitation light source; two different sampling resolutions are realized by adopting double-speed sampling, the slow pulse is taken as a metering unit input signal by sampling in a working mode, the lower sampling frequency is used, the awakening frequency of an MCU controller is reduced, and the power consumption is reduced; the rapid pulse is adopted as an input signal of the metering unit in the test mode, so that the requirement of higher display resolution is met by using a faster sampling frequency.
The sampling disc is mounted on the drive shaft of the movement according to a revolution volume of 1.2L, and when the sampling disc rotates synchronously with the drive shaft of the movement, the maximum signal frequency of the fast pulse is 16.8Hz, and the slowest signal frequency of the slow pulse is 2.8 as shown in FIG. 6. According to the sampling theorem, the sampling frequency is not less than 2 times of the maximum signal frequency, and in practical application, the sampling frequency is ensured to be 2.56-4 times of the maximum signal frequency, wherein qr is overload flow and qmin is minimum flow.
In this design, a 6-square diaphragm gas meter is considered. Two sampling frequencies are set, the slow sampling frequency is 10Hz, and the fast sampling frequency is 50Hz.
In the working mode, the sampling frequency is set to be 10Hz, the count value of the slow pulse signal is used as the input signal of the MCU metering unit, the MCU wake-up frequency is low, and the low-power consumption requirement in the working mode is met.
The sampling frequency is set to be 50Hz in the test mode, the count value of the rapid pulse signal is used as the input signal value of the metering unit, the resolution of the rapid pulse is higher, and the requirement of high display resolution in the test mode is met.
Based on the condition of mechanical revolution volume 1.2L, the gas phenotype number specification is assumed to be 6 square/hour q n =6mw/h, then the overload traffic is q r 12 mMega/h, overload flow is the limit maximum flow, q r The maximum signal frequency of the fast pulse is 16.8Hz and the slowest signal frequency of the slow pulse is 2.8Hz. According to the sampling theorem, the sampling frequency is not less than 2 times of the maximum signal frequency, and the sampling frequency is ensured to be 2.56-4 times of the maximum signal frequency in practical application.
The main pulse is a slow pulse, one pulse represents a movement revolution volume, the movement revolution volume is 1.2L, and the gas volume under the working condition represented by the main pulse is 1.2L. The frequency of the auxiliary pulse signal is 6 times of that of the main pulse, namely one auxiliary pulse represents 1/6 revolution volume, when the revolution volume of the movement is 1.2L, one auxiliary pulse is 0.2L, and when the rising edge and the falling edge of the signal realize one division, the resolution of 0.1L can be realized.
Defining a variable main pulse as a count value of the main pulse; the variable subPlNum is defined as the technical value of the side pulse.
The value of the main pulse signal is increased by 1 at the rising edge of each main pulse signal.
And the rising edge of each auxiliary pulse signal is rounded up and then added with 1. The signal value of each auxiliary pulse is reduced, and the signal value of the auxiliary pulse is added by 0.5.
According to the above description, when the main pulse technical value mainPlNum is added to 1, the sub pulse technical value subPlNum should be 6 times the main pulse count value mainPlNum.
The main pulse is typically only an integer. The sub-pulse may have a 1-bit fraction for recording the falling edge of the sub-pulse, further improving the sampling resolution of the sub-pulse.
The sampling frequency is adaptive, namely, the maximum sampling frequency and the minimum sampling frequency required by the signal are determined in advance according to the characteristics such as the maximum value of the signal and the like; and then calculating a new sampling frequency according to the sampled real signal frequency.
In this design, a 6-square diaphragm gas meter is considered. Selecting the maximum value of the sampling frequency to be 80Hz according to 4 times of the maximum frequency of 16.8Hz of the rapid pulse, and marking the maximum value as sample_FREQ_MAX; the minimum sampling frequency (after rounding) was chosen to be 10Hz based on 2.56 times the slow pulse 2.8Hz, denoted SAMPLE FREQ MIN, and an intermediate sampling frequency was confirmed to be 50Hz based on 2.56 times the maximum frequency of 16.8Hz (after rounding), denoted SAMPLE FREQ NOR.
The variable smplFreq is defined for recording the current sampling frequency and initialized to the minimum sampling frequency, i.e., smplfreq=sample_freq_min.
The sampling program records the time point of the rising edge of the last two main pulses, and when the sampling program identifies the rising edge of the main pulse, the current time point is recorded. Calculating the signal frequency according to the time difference between the rising edge of the last pulse and the rising edge of the current pulse, and recalculating the sampling frequency smpLFreq according to the signal frequency value;
if the calculated sampling frequency smplFreq is greater than the maximum sampling frequency sample_freq_max, the sampling frequency is taken as smplfreq=sample_freq_max;
if the calculated sampling frequency smplFreq is less than the maximum sampling frequency sample_freq_min, the sampling frequency is taken as smplfreq=sample_freq_min;
setting a time threshold 40s; when the signal of the main pulse and the sub pulse does not change within 40s, the sampling frequency smplFreq is set again to the minimum sampling frequency, that is, smplfreq=sample_freq_min.
The initial state of the sampling flow is at the minimum sampling frequency.
The main pulse critical section processing method comprises the following steps: the main pulse is a slow pulse, one pulse represents a movement revolution volume, the movement revolution volume is 1.2L, and the gas volume under the working condition represented by the main pulse is 1.2L. The frequency of the auxiliary pulse signal is 6 times of that of the main pulse, namely one auxiliary pulse represents 1/6 revolution volume, and when the revolution volume of the movement is 1.2L, one negative pulse is 0.2L.
When the signal of the last sampling time of the main pulse is logic 0 and the value of the current sampling time is logic 1, determining the logic signal of the main pulse according to the current logic of the auxiliary pulse, wherein the judging method is as follows:
if the signal logic of the auxiliary pulse is 1, 1 is added in the main pulse counter, and the pulse signal of the current sampling is logic 1 (the signal obtained by comparing with the next sampling is used for judging the level change, and the level change is sequentially recursively calculated).
If the signal logic of the auxiliary pulse is 0, the signal is not processed and recorded, which is equivalent to discarding the sampling result of the main pulse, so as to avoid the uncertainty of the critical section signal. And meanwhile judging that the sampling frequency is smaller than the intermediate sampling frequency sample_freq_nor by adopting the frequency smplFreq, and setting the smplFreq to sample_freq_nor. The loss of the secondary pulse at this time can be avoided.
The auxiliary pulse correction method comprises the following steps: the main pulse count value mainPlNum is incremented by 1 and the sub pulse count value is corrected to 6 times mainPlNum at the rising edge of each main pulse signal.
The indexing ratio of the outer ring 7 to the inner ring 8 is 6:1, the revolution volume is 1.2, the minimum indexing is 0.2L, and N is 6 optimally.
The indexing ratio of the outer ring 7 to the inner ring 8 is 7:1.
The indexing ratio of the outer ring 7 to the inner ring 8 is 8:1.
The indexing ratio of the outer ring 7 to the inner ring 8 is 9:1.
The indexing ratio of the outer ring 7 to the inner ring 8 is 10:1.
The indexing ratio of the outer ring 7 to the inner ring 8 is 11:1.
The indexing ratio of the outer ring 7 to the inner ring 8 is 12:1.
The outer ring 7 and the inner ring 8 are arranged in concentric circles, and the radian of each section of the outer ring 7 is 15-30 degrees.
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," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The foregoing examples merely represent specific embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present application, which fall within the protection scope of the present application.
Claims (6)
1. The utility model provides an thing networking intelligent gas table double speed photoelectricity sampling device, includes basic table (1), its characterized in that: the base table (1) is provided with a rotary coding disc (2), an inner ring (8) for intermittently cutting off a passage between the emitting end of the Light Emitting Diode (LED) 1 and the receiving end of the photodiode (PD 1) is arranged on the coding disc (2), an outer ring (7) for intermittently cutting off a passage between the emitting end of the Light Emitting Diode (LED) 2 and the receiving end of the photodiode (PD 2) is also arranged on the coding disc (2), and the indexing ratio of the outer ring (7) to the inner ring (8) is N1;
the photosensitive diode PD1 receives infrared rays of the light emitting diode LED1, converts the infrared rays into electric signals and feeds the electric signals back to the MCU controller;
the photosensitive diode PD2 receives infrared rays of the light emitting diode LED2, converts the infrared rays into electric signals and feeds the electric signals back to the MCU controller.
2. The internet of things intelligent gas meter double-speed photoelectric sampling device as claimed in claim 1, wherein: the base table (1) is provided with a coding disc (2), a bracket (3), a circuit board (5) and a connector (6);
the support (3) is fixedly connected with the circuit board (5), the circuit board (5) is provided with a photoelectric component (4), the photoelectric component (4) comprises a photoelectric component A (9) and a photoelectric component B (10), the photoelectric component A (9) corresponds to the outer ring (7), and the photoelectric component B (10) corresponds to the inner ring (8);
the connector (6) is connected with an MCU controller.
3. The internet of things intelligent gas meter double-speed photoelectric sampling device as claimed in claim 2, wherein: the photoelectric component A (9) comprises a light emitting diode (LED 2) and a photo diode (PD 2), wherein the anode of the light emitting diode (LED 2) is connected with the cathode of the photo diode (PD 2) and then is respectively connected with a voltage VCC and the collector of a triode (Q2), the emitter of the triode (Q2) is respectively connected with one end of a resistor (R22) and the ground, the other end of the resistor (R22) is respectively connected with the base of the triode (Q2) and the anode of the photo diode (PD 2), the collector of the triode (Q2) is connected with an MCU controller through a GPI-2 interface, and the cathode of the light emitting diode (LED 2) is connected with the MCU controller through a GPI 0-2 interface.
4. The internet of things intelligent gas meter double-speed photoelectric sampling device as claimed in claim 3, wherein: the light emitting diode LED2 and the photosensitive diode PD2 are oppositely arranged, the outer ring (7) is in a half-ring shape, and the outer ring (7) rotates along with the coding disc (2) intermittently to cut off a passage between the emitting end of the light emitting diode LED2 and the receiving end of the photosensitive diode PD 2.
5. The internet of things intelligent gas meter double-speed photoelectric sampling device as claimed in claim 2, wherein: the photoelectric component B (10) comprises a light emitting diode (LED 1) and a photodiode (PD 1), wherein the anode of the light emitting diode (LED 1) is connected with the cathode of the photodiode (PD 1) and then is respectively connected with a voltage VCC and the collector of a triode (Q1), the emitter of the triode (Q1) is respectively connected with one end of a resistor (R12) and the ground, the other end of the resistor (R12) is respectively connected with the base of the triode (Q1) and the anode of the photodiode (PD 1), the collector of the triode (Q1) is connected with an MCU (micro control unit) through a GPI-1 interface, and the cathode of the light emitting diode (LED 1) is connected with the MCU through a GPI 0-1 interface.
6. The internet of things intelligent gas meter double-speed photoelectric sampling device according to claim 4, wherein: the light emitting diode LED1 and the photodiode PD1 are oppositely arranged, the inner ring (8) is in six evenly distributed arc shapes, and the inner ring (8) rotates along with the coding disc (2) to intermittently cut off a passage between the emitting end of the light emitting diode LED1 and the receiving end of the photodiode PD 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010691965.5A CN114018355B (en) | 2020-07-17 | 2020-07-17 | Internet of things intelligent gas meter double-speed photoelectric sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010691965.5A CN114018355B (en) | 2020-07-17 | 2020-07-17 | Internet of things intelligent gas meter double-speed photoelectric sampling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114018355A CN114018355A (en) | 2022-02-08 |
| CN114018355B true CN114018355B (en) | 2023-05-09 |
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