Gas meter photoelectric signal sampling device and method

Abstract

The invention discloses a gas meter photoelectric signal sampling device and method, the gas meter photoelectric signal sampling device comprises a carrier, a rotating body and triggers, the rotating body is coaxially provided with an inner ring baffle and an outer ring baffle, the first point position of the rotating track of the inner ring baffle is provided with an inner trigger, and the second point position of the rotating track of the outer ring baffle is provided with an outer trigger; the outer ring baffle plate comprises a plurality of outer baffle plates which are annularly and uniformly distributed, and when the outer baffle plates pass through the outer trigger, the outer trigger is excited to generate a first pulse signal; the inner ring baffle plate comprises a plurality of inner baffle plates, the plurality of inner baffle plates are annularly and uniformly distributed, and when the inner baffle plates pass through the inner trigger, the inner trigger is excited to generate a second pulse signal; the outer baffle and the inner baffle are arranged in a staggered mode, and the included angle between the first point position and the second point position is arranged according to the staggered included angle between the inner baffle and the outer baffle, so that when the rotating body rotates, change nodes of the first pulse signal and the second pulse signal appear alternately. The carrier receives the first pulse signal, and the second pulse signal is used for metering a metering target.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of meter, and particularly relates to a gas meter photoelectric signal sampling device and method. BACKGROUND

[0002] In the existing membrane type gas meter sampling technology, Hall or photoelectric signal acquisition scheme is usually adopted, but the following problems may exist: Insufficient direction detection: unable to effectively identify reverse flow caused by reverse gas inlet and outlet, and needs to rely on additional sensors or manual investigation; Shaking error: false pulse signals are easily generated when the gas meter is vibrated, leading to error accumulation; Limited sampling accuracy: the sampling design of the supporting mechanical gear is difficult to improve the resolution, for example, only a small amount of pulse signals are generated per circle, leading to insufficient sampling accuracy.

[0003] Therefore, there is an urgent need for a meter capable of high-precision sampling. SUMMARY

[0004] The purpose of the present application is to provide a gas meter photoelectric signal sampling device and method, which realizes high-precision metering through double-pulse signal sampling and has reverse flow detection and shaking error suppression functions.

[0005] The technical solution adopted by the present application to solve the technical problem is to provide a gas meter photoelectric signal sampling device, which comprises a carrier for receiving pulse signals, a rotating body driven to rotate by a flowing metering target, and a trigger for generating pulse signals, wherein the rotating body is coaxially provided with an inner ring baffle and an outer ring baffle, a first point position of the rotating track of the inner ring baffle is provided with an inner trigger, and a second point position of the rotating track of the outer ring baffle is provided with an outer trigger; the outer ring baffle comprises a plurality of outer baffles which are uniformly distributed in a ring shape, and the outer trigger generates a first pulse signal when the outer baffle passes through the outer trigger; the inner ring baffle comprises a plurality of inner baffles which are uniformly distributed in a ring shape, and the inner trigger generates a second pulse signal when the inner baffle passes through the inner trigger; the outer baffle and the inner baffle are arranged in a staggered manner, and the included angle between the first point position and the second point position is set according to the staggered included angle of the inner baffle and the outer baffle, so that the change nodes of the first pulse signal and the second pulse signal alternately appear when the rotating body rotates; and the carrier receives the first pulse signal and the second pulse signal for metering the metering target.

[0006] Further, the metering target at least includes gaseous metering targets such as gas, oxygen and the like, and the corresponding applicable device can be a gas meter, an oxygen meter and the like; it can also be used for liquid metering targets such as water, coolant and the like, and the corresponding applicable device can be a water meter, a flow meter and the like. The metering parameters can include volume and flow.

[0007] Further, the outer ring baffle includes three outer baffles, the three outer baffles are uniformly distributed in a ring shape, and the interval angle between adjacent outer baffles is 120°; the inner ring baffle includes three inner baffles, the three inner baffles are uniformly distributed in a ring shape, and the interval angle between adjacent inner baffles is 120°.

[0008] Further, the dislocation angle between the inner baffle and the outer baffle is 30°.

[0009] Further, the included angle between the first point and the second point is 120° or 180°.

[0010] Further, the rotating body includes a transmission structure and an end table, the transmission structure is arranged on the back surface of the end table, the front surface of the end table is provided with the inner ring baffle and the outer ring baffle, and the transmission structure is coaxial with the inner ring baffle and the outer ring baffle; when the transmission structure is driven by the flowing metering target, the inner ring baffle and the outer ring baffle are driven to rotate synchronously.

[0011] Further, the front surface of the end table faces the carrier, the outer trigger and the inner trigger are fixedly installed on the carrier, so that the outer trigger is in the second point and the inner trigger is in the first point; the center of the front surface of the end table is provided with a rotating shaft, and the rotating body is rotatably connected with the carrier through the rotating shaft.

[0012] Further, it further includes a light shield, the light shield covers the end table from the back surface of the end table on the carrier, and a through hole is formed in the center of the bottom of the light shield, so that the transmission structure is exposed from the through hole and the transmission structure establishes a transmission relationship with the flowing metering target.

[0013] The application further provides a gas meter photoelectric signal sampling method, which is suitable for the gas meter photoelectric signal sampling device. A first pulse sequence of a first pulse signal and a second pulse sequence of a second pulse signal are preset, the first pulse sequence is at least one cycle of pulse signals of the first pulse signal, and the second pulse sequence is at least one cycle of pulse signals of the first pulse signal. The first pulse sequence includes a first positive rotation sequence and a first reverse rotation sequence, and the second pulse sequence includes a second positive rotation sequence and a second reverse rotation sequence. A logic sequence of pulse signals is generated based on the first pulse sequence and the second pulse sequence, and the logic sequence is a pulse sequence when an instrument is positively rotated. A reverse sequence of pulse signals is generated based on the first pulse sequence and the second pulse sequence, and the reverse sequence is a pulse sequence when the instrument is reversely rotated. Acquire the first pulse signal, the second pulse signal, generate a sampling signal, judge whether there are N consecutive pulse signals in the set period according to the logic sequence in the sampling signal: If yes, then according to the sampling signal, the measurement parameter of the measurement target is accumulated; If no, then do not respond; Wherein, N is a preset value.

[0014] Further, it also includes: Compare the node change characteristics of the pulse signal generated by the reverse sequence and the logic sequence, output the forward rotation level characteristics and the reverse rotation level characteristics; the node change characteristics are the pulse level change of the first pulse signal and the second pulse signal; When the sampling signal is acquired, the node change characteristics of the sampling signal are extracted, and it is judged whether the instrument is reverse installed: When the node change characteristics of the sampling signal match the forward rotation level characteristics, the instrument is forward installed; When the node change characteristics of the sampling signal match the reverse rotation level characteristics, the instrument is reverse installed, and reverse installation alarm information is sent, the alarm information at least includes the instruction of closing the valve in the instrument.

[0015] The beneficial effects of the present application are: The gas meter photoelectric signal sampling device and method provided by the present application realizes high-precision measurement through double-pulse signal sampling, and has reverse flow detection and jitter error suppression functions.

[0016] There are two annular baffles on the gear end face, the number of annular baffles is configured according to the precision requirement, the inner and outer annular baffles are staggered, there are three baffles evenly distributed in each circle, the interval between adjacent baffles is 120°, and the inner and outer annular baffles are staggered by 30°, for example, the gear outputs 12 pulse signals per rotation, and the single pulse resolution is high; the precision can be further improved by increasing the number of annular baffles or optical couplings.

[0017] The pulse signal sequence of the inner and outer optical couplings is fixed, the level sequence is analyzed by software, the gear rotation direction can be judged in real time, and then it is detected whether the instrument is reverse installed, and the valve is closed or an alarm is triggered.

[0018] Without additional sensors, reverse flow recognition is realized through signal timing analysis, and the reverse installation hidden danger is solved; combined with time window and signal continuity judgment, the measurement error caused by vibration is significantly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the application. In the drawings:

[0020] Figure 1 A schematic diagram of a gas meter photoelectric signal sampling device according to an embodiment of the present application; Figure 2 A schematic diagram of an annular baffle arrangement on a gear end face; Figure 3 A schematic diagram of a misaligned arrangement of photo-couplers on the inner and outer baffles; Figure 4 A schematic diagram of an aligned arrangement of photo-couplers on the inner and outer baffles; Figure 5 A schematic diagram of a U-shaped photo-coupler cooperating with a baffle.

[0021] In the figure: 1, carrier; 2, rotating body; 3, light shield; 4, outer baffle; 5, inner baffle; 6, outer trigger; 7, inner trigger; 21, end table. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application and the prior art, specific embodiments of the present application will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description only represent some embodiments of the present application, and those skilled in the art can also obtain other drawings and other embodiments according to these drawings without any creative effort. In addition, the design orientation only represents the relative positional relationship between the components, not the absolute positional relationship.

[0023] The present application provides a gas meter photoelectric signal sampling device, please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5The application relates to a rotating body for generating pulse signals, mainly comprising a carrier 1 for receiving the pulse signals, a rotating body 2 driven to rotate by a flowing metering target, and a trigger for generating the pulse signals, wherein the rotating body 2 is coaxially provided with an inner ring baffle 5 and an outer ring baffle 4, a first point position of the rotating track of the inner ring baffle is provided with an inner trigger 7, and a second point position of the rotating track of the outer ring baffle is provided with an outer trigger 6; the outer ring baffle comprises a plurality of outer baffles which are uniformly distributed in a ring shape, and the outer trigger generates a first pulse signal when the outer baffle passes through the outer trigger; the inner ring baffle comprises a plurality of inner baffles which are uniformly distributed in a ring shape, and the inner trigger generates a second pulse signal when the inner baffle passes through the inner trigger; the outer baffle and the inner baffle are arranged in a staggered mode, the included angle between the first point position and the second point position is arranged according to the staggered angle of the inner baffle and the outer baffle, so that the change nodes of the first pulse signal and the second pulse signal alternately appear when the rotating body rotates; and the carrier receives the first pulse signal and the second pulse signal for metering the metering target.

[0024] The metering target at least comprises gaseous metering targets such as fuel gas, oxygen and the like, and the corresponding applicable instrument can be a fuel gas meter, an oxygen meter and the like; the metering target can also be used for liquid metering targets such as water, cooling liquid and the like, and the corresponding applicable instrument can be a water meter, a flow meter and the like. The metering parameter can include volume and flow.

[0025] In the application, the trigger comprises the inner trigger 7 and the outer trigger 6, wherein the inner trigger 7 is located on the rotating track of the inner ring baffle, the outer trigger 6 is located on the rotating track of the outer ring baffle, the position of the trigger is fixed, and the trigger generates a pulse signal when the baffle passes through the trigger during the rotation of the rotating body 2; the pulse signal generated by the inner trigger 7 is recorded as the second pulse signal, and the pulse signal generated by the outer trigger 6 is recorded as the first pulse signal.

[0026] In the application, the inner ring baffle and the outer ring baffle both comprise a plurality of baffles which are uniformly distributed in a ring shape and arranged in a staggered mode; according to the staggered angle of the inner and outer baffles, the angle between the inner trigger and the outer trigger is adjusted, so that the change nodes of the first pulse signal and the second pulse signal alternately appear, that is, the change nodes of the high and low levels of the two pulse signals alternately appear; for example, when the first pulse signal changes from a low level to a high level, the level of the second pulse signal changes once during the maintaining time of the high level of the first pulse signal; and for example, when the second pulse signal changes from a low level to a high level, the first pulse signal changes from a high level to a low level during the maintaining time of the high level of the second pulse signal.

[0027] Specifically, the first point position of the rotating track of the inner ring baffle is selected to arrange the inner trigger 7, and the second point position of the rotating track of the outer ring baffle is selected to arrange the outer trigger 6; the included angle between the first point position and the second point position is arranged according to the staggered angle of the inner and outer ring baffles, so that the change nodes of the first pulse signal and the second pulse signal alternately appear.

[0028] The trigger in the application can be a U-shaped optical coupler, and the relative position relationship between the baffle and the trigger can be referred to Figure 5 , the two sides of the U-shaped optical coupler are respectively provided with a transmitting end and a receiving end, and the transmitting end and the receiving end are in a pair of shooting relationship. When the baffle is rotated into the groove of the U-shaped optical coupler, the pair of shooting light rays are blocked, and the trigger generates a low-level signal. When the baffle is rotated out of the groove of the U-shaped optical coupler, the pair of shooting light rays are conducted, and the trigger generates a high-level signal.

[0029] In order to ensure the stability of the cooperation between the optical coupler and the baffle, a light shield 3 can be provided to ensure that no other light interferes with the optical coupler to generate an error level signal.

[0030] In the embodiment of the application, the rotating body 2 can include a transmission structure and an end table 21. The transmission structure is arranged on the back surface of the end table. The front surface of the end table 21 is provided with an inner ring baffle and an outer ring baffle. The transmission structure is coaxial with the inner ring baffle and the outer ring baffle. When the transmission structure is driven by the flowing measurement target, the inner ring baffle and the outer ring baffle are driven to rotate synchronously.

[0031] For example, the transmission structure can be a gear. The gear shaft is coaxial with the inner ring baffle and the outer ring baffle, as shown in Figure 2 When the gear rotates, the inner ring baffle and the outer ring baffle rotate synchronously, and the rotation axes of the three are consistent.

[0032] The front surface of the end table can be directed towards the carrier 1. The outer trigger and the inner trigger are mounted and fixed on the carrier 1, so that the outer trigger is in the second point position and the inner trigger is in the first point position. The gear shaft can be extended to the front surface of the end table 21, so that it is located at the center of the front surface of the end table. The rotating shaft located at the center is rotationally connected with the carrier 1.

[0033] Based on the structural configuration between the rotating body 2 and the carrier 1, the light shield 3 can be arranged on the carrier 1 from the back surface of the end table 21. A through hole is formed in the center of the bottom of the light shield 3. The transmission structure is exposed from the through hole, so that the transmission structure establishes a transmission relationship with the flowing measurement target.

[0034] It should be clear that the diameter of the annular wall of the light shield 3 should be greater than the diameter of the end table 21, so as not to affect the rotation of the end table 21 around the shaft. The height of the annular wall is greater than the height of the inner ring baffle and the outer ring baffle, so as to complete the shielding and block the light from entering. The through hole formed on the bottom wall is matched with the transmission structure, for example, the distance between the through hole is slightly greater than the gear, so that the gear can be exposed and can establish a transmission relationship with other structures. The purpose is that these other structures are driven by the flowing measurement target to produce rotation.

[0035] For example, the gear can be in meshing transmission with the base table. When the instrument is working, the gear is driven to rotate, that is, the rotating body 2 produces rotation. The annular baffles on the end table 21 pass through the optical coupler gap, so that the optical coupler generates high and low levels.

[0036] The annular wall of the light shield 3 can be in airtight form with the carrier 1 to ensure the light shielding effect; the transmission structure should have a small area on the back of the end table 21, and the bottom wall should be as close as possible to the back of the end table 21 to make the overlapping area of the bottom wall and the back of the end table larger to effectively block the light from entering.

[0037] In the embodiments of the present application, the inner and outer ring baffles are taken as an example to be explained and described, which include three baffles: Specifically, please refer to Figure 2 The outer ring baffle includes three outer baffles, and the three outer baffles are evenly distributed in a ring shape, and the interval angle between adjacent outer baffles is 120°; the inner ring baffle includes three inner baffles, and the three inner baffles are evenly distributed in a ring shape, and the interval angle between adjacent inner baffles is 120°.

[0038] The dislocation angle of the inner baffle and the outer baffle is set to 30°, at this time, the included angle between the first point and the second point can be 120°, as shown in Figure 3 The included angle between the first point and the second point can also be 180°, as shown in Figure 4 The trigger located at the first point and the second point is fixed based on the carrier 1.

[0039] When the included angle between the first point and the second point is 120°, taking the view of Figure 3 as the reference, when the end table 21 is rotated forward: The first pulse signal of the outer trigger 6 is: 0110011001100110 The second pulse signal of the inner trigger 7 is: 1100110011001100 The above is the forward rotation pulse level of one period, wherein 0 represents low level and 1 represents high level, and it can be seen that the inner trigger 7 always triggers high level first during forward rotation.

[0040] When the end table 21 is reversed: The first pulse signal of the outer trigger 6 is: 0011001100110011 The second pulse signal of the inner trigger 7 is: 1001100110011001 The above is the reverse rotation pulse level of one period, wherein 0 represents low level and 1 represents high level, and it can be seen that the outer trigger 6 always triggers high level first during reverse rotation.

[0041] Therefore, when it is determined that the included angle between the first point and the second point is 120°, the rotation direction of the end table 21 can be determined according to the first triggering of high level in the period, when the inner trigger 7 triggers high level first, it is forward rotation; when the outer trigger 6 triggers high level first, it is reverse rotation. It can also be used to determine whether the instrument is installed reversely.

[0042] When the angle between the first point and the second point is 180°, the first pulse signal of the outer trigger 6 is 1100110011001100 Figure 4 When the end table 21 is rotated forward, the first pulse signal of the outer trigger 6 is 1100110011001100 The second pulse signal of the inner trigger 7 is 0110011001100110 The second pulse signal of the inner trigger 7 is 0110011001100110 The above is the forward rotation pulse level of one period, wherein 0 represents low level and 1 represents high level. It can be seen that the outer trigger 6 always triggers high level first during forward rotation.

[0043] When the end table 21 is rotated backward, the first pulse signal of the outer trigger 6 is 1001100110011001 The second pulse signal of the inner trigger 7 is 0011001100110011 The second pulse signal of the inner trigger 7 is 0011001100110011 The above is the backward rotation pulse level of one period, wherein 0 represents low level and 1 represents high level. It can be seen that the inner trigger 7 always triggers high level first during backward rotation.

[0044] Therefore, when it is determined that the angle between the first point and the second point is 180°, the rotation direction of the end table 21 can be determined according to the first triggering of high level in the period. When the inner trigger 7 triggers high level first, it is backward rotation. When the outer trigger 6 triggers high level first, it is forward rotation. The instrument can also be determined whether it is installed reversely based on this.

[0045] The single baffle (inner and outer baffles) triggers two optocouplers to generate four kinds of level combinations (00, 01, 11, 10), and 12 pulse signals can be generated in one rotation period. Taking gas as an example, if 2.4 liters of gas are calibrated per rotation, the single pulse resolution is 0.2 liters. The calibration data can be adjusted according to the accuracy requirement, so that the resolution of the single pulse meets the requirement.

[0046] Meanwhile, the accuracy can be further improved by increasing the number of inner and outer ring baffles or optocouplers. When the number of baffles of the inner and outer ring baffles is increased, the interval angle between the adjacent baffles will change, and the misalignment angle between the inner and outer baffles should be adjusted synchronously. At this time, the angle between the first point and the second point should also be adjusted synchronously.

[0047] In this application, when the degree of the misalignment angle changes, the angle between the first point and the second point should change synchronously, so that the change nodes of the first pulse signal and the second pulse signal appear alternately.

[0048] For example, the outer baffle and the inner baffle can be circular arc structures, which reduce the trajectory range during rotation and facilitate the passage through the groove space of the U-shaped optocoupler.

[0049] In the embodiment of the application, the pulse signals are periodically cycled during forward rotation and reverse rotation, and there is a signal characteristic that triggers a high level first, so that the rotation direction of the instrument can be judged in real time by analyzing the level sequence through software, and then whether the instrument is reverse-mounted can be detected, and the valve can be closed or an alarm can be triggered based on this.

[0050] At the same time, when a reverse signal (reverse rotation) occurs, accumulation can not be performed to avoid measurement errors; only forward signals are accumulated.

[0051] The application also provides a gas meter photoelectric signal sampling method, which calculates a measurement parameter of a measurement target based on a sampling signal, and can also judge the installation state of the instrument, and filters mechanical jitter of the instrument during use to achieve accurate measurement.

[0052] In the application, after the positions of the two flip-flops are fixed, the pulse signals during forward rotation and the pulse signals during reverse rotation can be obtained by rotating the end table, and based on this, a first pulse sequence of the first pulse signal and a second pulse sequence of the second pulse signal are preset, the first pulse sequence is at least one period of pulse signals of the first pulse signal, and the second pulse sequence is at least one period of pulse signals of the first pulse signal.

[0053] The first pulse sequence includes a first forward rotation sequence and a first reverse rotation sequence, and the second pulse sequence includes a second forward rotation sequence and a second reverse rotation sequence.

[0054] The logic sequence of the pulse signals is generated based on the first pulse sequence and the second pulse sequence, and the logic sequence is the pulse sequence during forward rotation of the instrument; and the reverse sequence of the pulse signals is generated based on the first pulse sequence and the second pulse sequence, and the reverse sequence is the pulse sequence during reverse rotation of the instrument.

[0055] The logic sequence and the reverse sequence are used as reference standards of the current instrument to implement functions such as measurement behavior, rotation direction judgment, and jitter filtering.

[0056] In the application, on the basis of the determined logic sequence, the instrument measures related parameters of the corresponding target, specifically including: The first pulse signal and the second pulse signal are obtained to generate a sampling signal, and it is judged whether there are continuous N pulse signals conforming to the logic sequence in a set period: If yes, the measurement parameter of the measurement target is accumulated according to the sampling signal; If no, no response is given; Wherein, N is a preset value.

[0057] In the embodiments of the present application, the set period can be a fixed number of periods, such as one complete period. If there are continuous N pulse signals in a logical order in one period, it is considered to be effective rotation, and the metering program is started to calculate the gas consumption. On the contrary, if less than N continuous pulse signals are detected, it is determined to be a mechanical vibration interference signal, at this time, no response can be made, and the metering is automatically terminated and the signal calculator is reset to avoid false accumulation.

[0058] In the present application, the logical order is used as the determination standard, which can effectively filter reverse dithering. At the same time, for forward dithering, N can be set to 3. If three continuous sequential pulses are detected when not ventilating, it is determined to be effective airflow and metering. If the signal is less than three sequential pulses for a short time, it is determined to be dithering interference, and the count is cleared.

[0059] In the present application, in the case of a misalignment angle of 120° between the first point and the second point, the node change of the pulse signals in the reverse order and the logical order can be compared to obtain the following characteristics: The forward rotation level characteristic is that the internal trigger 7 triggers high level first, that is, the high level of the second pulse signal is generated before the first pulse signal. The reverse level characteristic is that the external trigger 6 triggers high level first, that is, the high level of the first pulse signal is generated before the second pulse signal.

[0060] Based on this, it can be determined whether the instrument is reversed during installation. During the subsequent use of the instrument, the rotation direction of the instrument can be detected, and the main control system of the instrument can autonomously determine the rotation direction of the instrument.

[0061] In a specific embodiment, whether the instrument is reversed is determined, specifically including: The node change characteristics of the pulse signals in the reverse order and the logical order are compared, and the forward rotation level characteristic and the reverse rotation level characteristic are output. The node change characteristics are the relationship between the generation of the pulse levels of the first pulse signal and the second pulse signal. When the sampling signal is obtained, the node change characteristics of the sampling signal are extracted, and whether the instrument is reversed is determined: When the node change characteristics of the sampling signal match the forward rotation level characteristic, the instrument is installed in the correct direction. When the node change characteristics of the sampling signal match the reverse rotation level characteristic, the instrument is installed in the reverse direction, and a reverse installation alarm information is sent. The reverse installation alarm information at least includes an instruction to close the valve in the instrument.

[0062] Specifically, during the installation stage, the reverse installation alarm information can include alarm information, and the alarm information is reverse installation. During the subsequent use stage, the reverse installation alarm information can include an instruction to close the valve in the instrument, and a reverse information can be sent, indicating that the instrument is reversed.

[0063] It has to be noted that the terms "first", "second", etc. as used herein only serve the purpose to distinguish one general feature from another general feature, without prejudicing its positional relationship or order of sequence. Also, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without further constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0064] The above description is further to the present application in connection with specific preferred embodiments thereof. It is to be understood that the above description is not intended to limit the present application to these specific embodiments. Rather, without departing from the spirit of the present application, a number of simple modifications or substitutions can be made by a person of ordinary skill in the art to which the present application pertains, and these shall all come within the scope of the present application.

Claims

1. A gas meter photoelectric signal sampling device, characterized in that: The invention comprises a carrier (1) for receiving a pulse signal, a rotating body (2) driven by a flowing metering target to rotate, and a trigger for generating a pulse signal, wherein an inner ring baffle (5) and an outer ring baffle (4) are coaxially arranged on the rotating body (2), an inner trigger (7) is arranged at a first point of the rotation track of the inner ring baffle, and an outer trigger (6) is arranged at a second point of the rotation track of the outer ring baffle; the outer ring baffle comprises a plurality of outer baffles, the plurality of outer baffles are evenly distributed in a ring shape, and when the outer baffle passes through the outer trigger, the outer trigger is stimulated to generate a pulse signal. Generate a first pulse signal; the inner ring baffle includes a plurality of inner baffles, and the plurality of inner baffles are evenly distributed in a ring shape. When the inner baffle passes through the inner trigger, the inner trigger is stimulated to generate a second pulse signal; the outer baffle and the inner baffle are staggered, and the angle between the first point position and the second point position is set according to the staggered angle between the inner baffle and the outer baffle, so that when the rotating body rotates, the change nodes of the first pulse signal and the second pulse signal appear alternately; the carrier receives the first pulse signal and the second pulse signal for measuring the measurement target.

2. A gas meter photoelectric signal sampling device according to claim 1, characterized in that: The metering target at least includes a gaseous metering target.

3. A gas meter photoelectric signal sampling device according to claim 1, characterized in that: The outer ring baffle includes three outer baffles, which are evenly distributed in a ring shape, and the interval angle between adjacent outer baffles is 120°; the inner ring baffle includes three inner baffles, which are evenly distributed in a ring shape, and the interval angle between adjacent inner baffles is 120°.

4. A gas meter photoelectric signal sampling device according to claim 3, characterized in that: The staggered angle between the inner baffle and the outer baffle is 30°.

5. A gas meter photoelectric signal sampling device according to claim 4, characterized in that: The angle between the first point and the second point is 120° or 180°.

6. A gas meter photoelectric signal sampling device according to claim 1, characterized in that: The rotating body (2) includes a transmission structure and an end platform (21), wherein the transmission structure is arranged on the back of the end platform, and the inner ring baffle and the outer ring baffle are arranged on the front of the end platform, and the transmission structure is coaxial with the inner ring baffle and the outer ring baffle; when the transmission structure is driven by the flowing metering target, it drives the inner ring baffle and the outer ring baffle to rotate synchronously.

7. A gas meter photoelectric signal sampling device according to claim 6, characterized in that: The front of the end platform faces the carrier (1), and the external trigger and the internal trigger are mounted and fixed on the carrier (1), so that the external trigger is in the second position and the internal trigger is in the first position; a rotation axis is provided at the center of the front of the end platform, and the rotating body is rotationally connected to the carrier (1) via the rotation axis.

8. A gas meter photoelectric signal sampling device according to claim 7, characterized in that: It also includes a light shield (3), which covers the end platform on the carrier (1) from the back of the end platform. A through hole is opened at the center of the bottom of the light shield (3), so that the transmission structure is exposed from the through hole, so that the transmission structure establishes a transmission relationship with the flowing metering target.

9. A gas meter photoelectric signal sampling method, characterized in that: Applicable to the gas meter photoelectric signal sampling device according to claim 1, the method comprising: Preset a first pulse sequence of a first pulse signal and a second pulse sequence of a second pulse signal, wherein the first pulse sequence is a pulse signal of at least one cycle of the first pulse signal, and the second pulse sequence is a pulse signal of at least one cycle of the first pulse signal; The first pulse sequence includes a first forward sequence and a first reverse sequence, and the second pulse sequence includes a second forward sequence and a second reverse sequence; A logical sequence of generating pulse signals based on the first pulse sequence and the second pulse sequence, wherein the logical sequence is a pulse sequence when the instrument rotates forward; generating a reversal sequence of pulse signals based on the first pulse sequence and the second pulse sequence, wherein the reversal sequence is a pulse sequence when the instrument is reversed; Obtain the first pulse signal and the second pulse signal, generate a sampling signal, and determine whether the sampling signal contains N consecutive pulse signals that conform to the logical sequence within a set period: If yes, accumulating the metrology parameter of the metrology target according to the sampling signal; If not, no response; Wherein, N is a preset value.

10. A gas meter photoelectric signal sampling method according to claim 9, characterized in that: Also includes: Comparing the node change characteristics of the pulse signal generated by the inversion sequence and the logic sequence, and outputting a forward level characteristic and a reverse level characteristic; The node change feature is the relationship between the changes in the pulse levels of the first pulse signal and the second pulse signal; When the sampling signal is obtained, the node change feature of the sampling signal is extracted to determine whether the instrument is installed in reverse: When the node change characteristics of the sampling signal match the positive level characteristics, the instrument is properly installed; When the node change feature of the sampling signal matches the inversion level feature, the instrument is reversely installed and a reverse installation alarm message is sent, wherein the alarm message at least includes an instruction to close a valve in the instrument.

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