CN117330109A - Hall counting device, gas abnormal data identification method and related equipment - Google Patents
Hall counting device, gas abnormal data identification method and related equipment Download PDFInfo
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- 230000002159 abnormal effect Effects 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 40
- 239000010959 steel Substances 0.000 claims abstract description 40
- 230000001960 triggered effect Effects 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 112
- 239000002737 fuel gas Substances 0.000 claims description 16
- 238000004590 computer program Methods 0.000 claims description 8
- 230000005856 abnormality Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 10
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- 238000004364 calculation method Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
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- 239000003345 natural gas Substances 0.000 description 1
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- 230000035945 sensitivity Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
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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
- G01F15/068—Indicating or recording devices with electrical means
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Abstract
The application discloses hall counting device, gas abnormal data identification method and relevant equipment, hall counting device includes: the counter character wheel is provided with two groups of magnetic steels, and the polarities of one ends of the two groups of magnetic steels facing the outer side are opposite; and when one pole of the Hall sensor is triggered by the magnetic steel on the counter character wheel, the Hall sensor correspondingly outputs a low-level signal, and the high-level signal is kept to be output after the trigger disappears. According to the invention, through carrying out or operating on the double outputs of the two groups of Hall sensors, the rotation of the counter can be effectively counted under the condition of no magnetic field interference and stronger magnetic field interference, the flow statistics accuracy of the gas meter can be improved when the counter is used for the gas meter, and the abnormality such as overcurrent, micro-leakage and the like of the gas meter can be effectively identified through the gas abnormal data identification method.
Description
Technical Field
The invention belongs to the technical field of fluid flow monitoring, and particularly relates to a Hall counting device for flow monitoring, a gas abnormal data identification method and related equipment.
Background
The basic method for counting the rotation of the character wheel by utilizing the Hall switch sensor is that a cylindrical magnet is arranged on the character wheel, one or two Hall switch sensors are distributed on a circuit substrate at one side or two sides of the character wheel, the Hall switch sensors can be monopolar or nonpolar, and if the Hall switch sensors are monopolar, the corresponding magnetic poles of the cylindrical magnet are required to be arranged close to the edge of the character wheel; when the magnet is aligned with the Hall switch sensor, the magnetic field generated by the magnet exceeds the threshold value of the trigger point of the Hall switch sensor, so that the Hall switch sensor outputs a pulse, and the counting of the number of turns of the character wheel is realized by counting the pulse.
The patent application with publication number of CN107314782A discloses a Hall counting device, a bipolar double-output Hall sensor is arranged on a circuit substrate, and normal counting under the condition of permanent magnetic interference can be realized by using the Hall sensor. The device generates a counting pulse every half circle of the rotation of the character wheel under normal conditions, but when permanent magnetic interference exists, the Hall sensors on the single side or the double sides are interfered, and no pulse is generated every half circle, so that the two counting pulses are uneven, and the follow-up counting processing and flow analysis are not facilitated.
Disclosure of Invention
Aiming at the problem that the counting error of the Hall counting device is larger in the permanent magnetic interference environment in the prior art, the invention aims to provide the Hall counting device capable of greatly reducing the counting error, a gas abnormal data identification method and related equipment.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
in a first aspect, the present application provides a hall counting device for a gas meter, comprising:
the counter character wheel is provided with two groups of magnetic steels, and the polarities of one ends of the two groups of magnetic steels facing the outer side are opposite;
the two groups of bipolar double-output Hall sensors are arranged at positions which are close to the positions where the magnetic steel passes when the counter character wheel rotates, and when one pole of the Hall sensor is triggered by the magnetic steel on the counter character wheel, the Hall sensor correspondingly outputs a low-level signal, and after the trigger disappears, the Hall sensor keeps outputting a high-level signal; wherein the method comprises the steps of
The N-level output signals of the first group of Hall sensors and the S-level output signals of the second group of Hall sensors output first Hall pulse signals through a first OR gate;
the S-level output signals of the first group of Hall sensors and the N-level output signals of the second group of Hall sensors output second Hall pulse signals through a second OR gate;
the S-level output signals of the first group of Hall sensors and the S-level output signals of the second group of Hall sensors output first magnetic interference identification signals through a third OR gate;
the N-level output signals of the first group of Hall sensors and the N-level output signals of the second group of Hall sensors output a second magnetic interference identification signal through a fourth OR gate;
and determining the rotation times of the counter character wheel according to the first Hall pulse signal, the second Hall pulse signal and the counting circuit.
Preferably, the two groups of magnetic steel are symmetrically arranged on two sides of the outer diameter edge of the counter character wheel.
Preferably, the two groups of Hall sensors are symmetrically arranged at two sides of the counter character wheel.
In a second aspect, the present application further provides a gas meter, including the above hall counting device.
In a third aspect, the present application further provides a method for identifying abnormal gas data by using the gas meter, where the method includes:
determining the gas flow rate through the first Hall pulse signal and the second Hall pulse signal;
if the gas flow rate exceeds the maximum gas flow rate or the gas flow rate in a certain time range exceeds a first threshold value, identifying that the gas is over-flowing abnormal;
if the flow rate of the fuel gas is basically unchanged within a certain time range, identifying that the gas consumption is abnormal due to overtime;
and if the gas flow rate is smaller than a second threshold value within a certain time range, identifying that the gas micro-leakage is abnormal.
Preferably, the determining the gas flow rate by the first hall pulse signal and the second hall pulse signal specifically includes:
determining the rotation speed of a counter character wheel according to the pulse time difference between the first Hall pulse signal and the second Hall pulse signal;
and determining the gas flow rate of the gas meter according to the rotation speed.
Preferably, the specific identification method of the gas consumption timeout abnormality comprises the following steps:
defining a plurality of gas flow rate levels and defining a maximum duration for each level;
when the flow rate of the fuel gas is stabilized at a certain level, starting timing, if the level is changed, re-timing, and when the timing length reaches the maximum duration corresponding to the level, identifying that the gas consumption is abnormal.
In a fourth aspect, the present application provides a gas abnormal data identification apparatus, including:
the fuel gas flow rate determining module is used for determining the fuel gas flow rate according to the first Hall pulse signal and the second Hall pulse signal;
the gas abnormal data identification module is used for judging the type of the gas abnormal data, and identifying the gas abnormal data as a gas overcurrent abnormal signal if the gas flow rate exceeds the maximum gas flow rate or if the flow rate in a certain time range exceeds a first threshold value; if the flow rate of the fuel gas is basically unchanged within a certain time range, identifying that the gas consumption is abnormal due to overtime; and if the gas flow rate is smaller than a second threshold value within a certain time range, identifying that the gas micro-leakage is abnormal.
In a fifth aspect, the present application further provides a gas abnormal data identification system, including:
one or more processors;
a memory for storing one or more programs,
when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the gas anomaly data identification method of any one of the above.
In a sixth aspect, the present application further provides a computer storage medium having stored thereon a computer program which, when executed by a processor, implements the gas abnormal data identification method of any one of the above.
According to the counter word wheel counting method, the counter word wheel counting device and the counter word wheel counting system, the problem that pulse counting is inaccurate only due to bipolar output of the Hall sensors in the prior art is solved, two groups of magnetic steels are arranged on the counter word wheel, two groups of bipolar Hall sensors are arranged near the counter word wheel, N-level output signals of the first group of Hall sensors and S-level output signals of the second group of Hall sensors output first Hall pulse signals through a first OR gate, S-level output signals of the first group of Hall sensors and N-level output signals of the second group of Hall sensors output second Hall pulse signals through a second OR gate, and therefore even under the condition of permanent magnetic interference, counting can be carried out through the first Hall pulse signals and the second Hall pulse signals, and accordingly the rotating speed of the counter word wheel is calculated, and corresponding magnetic field interference conditions can be recognized through the first magnetic interference identification signals and the second magnetic interference identification signals.
When the Hall counting device is used for the gas meter, the flow speed of the gas meter and the flow in a certain time can be calculated according to the rotating speed of the counter character wheel, and after the corresponding flow speed and flow are obtained, abnormal conditions such as gas overflow, micro leakage, gas utilization overtime and the like of the gas meter can be identified, so that dangers are avoided.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a Hall counting device;
FIG. 2 is a signal diagram of the output of two sets of Hall sensors of the Hall counting device under the condition of no magnetic field interference;
FIG. 3 is a signal diagram of two Hall pulse signals and two magnetic interference identification signals of a Hall counting device under the condition of no magnetic field interference;
FIG. 4 is a graph of signals output by two sets of Hall sensors under magnetic field interference conditions;
FIG. 5 is a signal diagram of two Hall pulse signals and two magnetic interference identification signals of one group of Hall sensors under the condition of magnetic field interference;
FIG. 6 is a graph of signals output by two sets of Hall sensors under the condition of stronger magnetic field interference;
FIG. 7 is a signal diagram of two Hall pulse signals and two magnetic interference identification signals of two groups of Hall sensors under the condition of stronger magnetic field interference;
FIG. 8 is a graph of signals output by two sets of Hall sensors under the condition of extremely strong magnetic field interference;
FIG. 9 is a signal diagram of two Hall pulse signals and two magnetic interference identification signals of two groups of Hall sensors under the condition of extremely strong magnetic field interference;
FIG. 10 is a flow chart of a method of identifying gas anomaly data;
FIG. 11 is a schematic diagram of a device for identifying abnormal fuel gas data;
FIG. 12 is a schematic diagram of a gas anomaly data recognition system according to an embodiment of the present disclosure;
fig. 13 is a schematic structural diagram of an embodiment of a computer storage medium provided in the present application.
Detailed Description
The invention will be further described with reference to examples and drawings, to which reference is made, but which are not intended to limit the scope of the invention.
In some existing hall counting devices for counting gas (such as natural gas) flow, two groups of magnetic steels are symmetrically arranged on a counter character wheel, and polarities of one ends of the two groups of magnetic steels facing the outer side are opposite, namely one of the two groups of magnetic steels facing the outer side is an N pole, and the other is an S pole. The magnetic steel can be one of a cylindrical magnet, a bar magnet and a horseshoe magnet.
A group of bipolar double-output Hall sensors are arranged at positions which are close to the positions where the magnetic steel passes when the counter character wheel rotates, so that the Hall sensors can output corresponding signals only when the magnetic steel passes and triggers the Hall sensors. For example, when the N pole of one set of magnetic steel is close to the Hall sensor, the N pole output of the Hall sensor changes from high level to low level, when the N pole of the set of magnetic steel is far away from the Hall sensor, the N pole of the Hall sensor is released to high level, when the S pole of the other set of magnetic steel is close to the Hall sensor, the S pole output of the Hall sensor changes from high level to low level, and when the S pole of the set of magnetic steel is far away from the Hall sensor, the S pole of the Hall sensor is released to high level.
Under the condition of no external magnetic field interference, the N pole and the S pole of the Hall counting device can output a low-level pulse every time the counter character wheel rotates for one circle, and if the N pole and the S pole are overlapped, the low-level pulse exists every time the counter character wheel rotates for half a circle, so that the rotating speed of the counter character wheel can be calculated, and the gas flow is obtained.
However, once the external magnetic field is interfered, the pulse output by the N pole and the S pole of the Hall counting device in each rotation of the counter character wheel is unstable, for example, the N pole of the Hall counting device is interfered by the magnetic field, the N pole of the Hall counting device always outputs a low level until the S pole magnetic steel rotates to the position to counteract the interference magnetic field, and the N pole and the S pole of the Hall counting device can not be overturned to a high level, but if the superposition of the N pole and the S pole of the Hall counting device is considered, the pulse cannot be output.
The present application thus presents an embodiment of a hall counting device as shown in fig. 1, which can be used for flow counting devices for gases, liquids and other fluids such as gas meters.
In this embodiment, two groups of separated bipolar double-output hall sensors are mainly arranged at positions where magnetic steel passes when a counter word wheel rotates, and when the hall sensor senses N-pole magnetic steel, the N-pole of the hall sensor outputs a low-level signal, and when the S-pole magnetic steel is sensed, the S-pole of the hall sensor also outputs a low-level signal, and when the hall sensor is released, the high-level signal is maintained.
The two groups of hall sensors can be distributed at the rotation periphery of the counter character wheel to form a certain included angle, for example, 45 degrees, 90 degrees or 120 degrees, in the embodiment, the two groups of hall sensors are preferably distributed symmetrically, namely, 180 degrees included angle is formed, and in the case that the two groups of magnetic steels are also distributed symmetrically, the N pole or the S pole of the hall sensors can output a signal every half rotation of the counter character wheel.
In order to improve the triggering sensitivity, two groups of magnetic steels are preferably arranged on two sides of the outer diameter edge of the counter word wheel, so that the magnetic steels can be closer to the Hall sensor and trigger the Hall sensor.
In order to overcome magnetic field interference, the embodiment also outputs a first Hall pulse signal Y1 through a first OR gate by using N-level output signals of a first group of Hall sensors (Hall 1) and S-level output signals of a second group of Hall sensors; the S-level output signals of the first group of Hall sensors and the N-level output signals of the second group of Hall sensors output a second Hall pulse signal Y2 through a second OR gate; the S-level output signals of the first group of Hall sensors and the S-level output signals of the second group of Hall sensors output a first magnetic interference identification signal Y3 through a third OR gate; the N-level output signals of the first group of Hall sensors and the N-level output signals of the second group of Hall sensors output a second magnetic interference identification signal Y4 through a fourth OR gate.
In normal operation, the signals generated by the first group of hall sensors and the second group of hall sensors are shown in fig. 2, wherein H represents a high level, and waveforms of the first hall pulse signal Y1, the second hall pulse signal Y2, the first magnetic interference identification signal Y3 and the second magnetic interference identification signal Y4 are shown in fig. 3. It can be seen that when the N pole of the hall sensor is triggered by the N pole magnetic steel or the S pole of the hall sensor is triggered by the S pole magnetic steel, a count pulse with a low level is correspondingly generated, so that normal counting can be performed by using Y1 and Y2, and at this time, the first magnetic interference identification signal Y3 and the second magnetic interference identification signal Y4 keep high level all the time.
When one of the poles (such as the N pole of the Hall sensor 1) of one group of Hall sensors is interfered by an external magnetic field, the N pole signal of the Hall sensor 1 is always triggered to keep a low level, as shown in fig. 4, wherein L represents a low level until the S pole magnetic steel turns to the Hall sensor 1 to counteract the N pole magnetic field, so that the N pole of the Hall sensor 1 is released and turned to a high level, and the other group of Hall sensors (Hall sensor 2) can still normally output the trigger signals of the N pole and the S pole. At this time, the processed first hall pulse signal Y1 and second hall pulse signal Y2 may still generate one count pulse in sequence every half turn of the counter word wheel, as shown in fig. 5. At this time, the first magnetic interference identification signal Y3 and the second magnetic interference identification signal Y4 still maintain high level because the magnetic interference intensity is not large, only one group of hall sensors is acted, and the hall counting device can count normally.
When two groups of Hall sensors are triggered by the interference of external S-pole magnetic fields, the S-pole output signals of the two groups of Hall sensors are always triggered to keep low level, and the S-pole of the Hall sensors can be released to be high level only when the N-pole magnetic steels of the counter character wheel sequentially rotate beside the Hall sensors, and the N-pole magnetic steels of the counter character wheel counteract the interference S-pole magnetic fields, as shown in fig. 6. At this time, the first hall pulse signal Y1 and the second hall pulse signal Y2 sequentially generate one count pulse every half turn of the counter wheel, and at the same time, the first magnetic interference identification signal Y3 triggers to a low level at the gap between the first hall pulse signal Y1 and the second hall pulse signal Y2 generating the count pulse, as shown in fig. 7.
Similarly, when the two groups of hall sensors are triggered by the interference of the external N-pole magnetic field, the gap between the first hall pulse signal Y1 and the second hall pulse signal Y2, which generate counting pulses, of the second magnetic interference identification signal Y4 is triggered to be at a low level.
It can be seen that the triggering of the first magnetic interference identification signal Y3 and the second magnetic interference identification signal Y4 to a low level can be identified as the external strong magnetic field interference, and the triggering of the first magnetic interference identification signal Y3 to a low level can be identified as the S-pole strong magnetic interference, and the triggering of the second magnetic interference identification signal Y4 to a low level can be identified as the N-pole strong magnetic interference.
As shown in fig. 8 and 9, if the external magnetic field interference of the two hall sensors is strong to a certain extent, one pole (such as S pole) of the two hall sensors is triggered, the other pole magnetic steel (N pole) of the counter word wheel is aligned with the hall sensor and is still insufficient to counteract the influence of the S pole magnetic field interference, so that the S pole of the hall sensor is released, at this time, the first hall pulse signal Y1 and the second hall pulse signal Y2 cannot generate counting pulses, but the first magnetic interference identification signal Y3 or the second magnetic interference identification signal Y4 can generate low level, so that the external magnetic field interference can be identified, and likewise, the first magnetic interference identification signal Y3 triggers the low level to be S pole strong magnetic interference, and the second magnetic interference identification signal Y4 triggers the low level to be identified as N pole strong magnetic interference.
From the above analysis, it can be seen that the improved hall counting device can sequentially generate one counting pulse for each half turn of the wheel by the first hall pulse signal Y1 and the second hall pulse signal Y2, except in the case of extremely strong magnetic field interference, in the case of no magnetic field interference and relatively strong magnetic field interference (at least one group of hall sensors are interfered by magnetic field). The rotation speed of the counter character wheel can be calculated through the first Hall pulse signal Y1 and the second Hall pulse signal Y2 matched with corresponding counting circuits. The specific method comprises the following steps:
in the case where the two sets of magnetic steels and the two sets of hall sensors are equivalent in performance, the counting pulses generated by the first hall pulse signal Y1 and the second hall pulse signal Y2 are substantially uniform, as shown in fig. 3, at this time, the time difference between the falling edges of two adjacent counting pulses of the first hall pulse signal Y1 and the second hall pulse signal Y2 is the time when the counter character wheel rotates for half a turn, and assuming that the time difference between the falling edges of two adjacent counting pulses is Δt, the counter character wheel rotates for one turn for 2Δt, and the rotation speed s=1/(2Δt) of the counter character wheel.
The above-mentioned condition is the comparatively ideal condition of hall counting device, in actual conditions, because there is the difference in magnetic field intensity of two magnet steel, there is the difference in magnet steel surface and hall sensing surface interval, there is the difference in hall sensor trigger threshold, can lead to the pulse width that first hall pulse signal Y1 and second hall pulse signal Y2 produced to have the difference, and then lead to the unstable condition of time difference appearance of two adjacent count pulse falling edges of first hall pulse signal Y1 and second hall pulse signal Y2, lead to final count to appear great error. In order to eliminate the errors caused by the reasons, the calculation errors can be eliminated as much as possible by taking the center point of the counting pulse, and the calculation errors are specifically as follows:
as shown in fig. 5, assuming that the time from the first pulse falling edge to the rising edge of the first hall pulse signal Y1 is T1, the time from the first pulse rising edge to the pulse falling edge of the second hall pulse signal Y2 is T2, the time from the first pulse falling edge to the first pulse rising edge of the second hall pulse signal Y2 is T3, the time from the first pulse rising edge to the second pulse falling edge of the second hall pulse signal Y2 is T4, and the time from the second pulse falling edge to the second pulse rising edge of the first hall pulse signal Y1 is T5, the time difference t= (t1+t3)/2+t2 between the first pulse center point of the first hall pulse signal Y1 and the first pulse center point of the second hall pulse signal Y2, and the time difference t= (t1+t3)/2+t2 between the first pulse center point of the second hall pulse signal Y2 and the second pulse center point of the first hall pulse signal Y2 is T4' = (T1+t3)/T4+t2. It will be appreciated that T is the time of the first half of the counter wheel rotation and T' is the time of the second half of the counter wheel rotation. The time of the counter wheel rotating half cycle can be calculated through T, T 'or the average value of the two (in the actual situation, the average value of T and T' is taken as the time of the counter wheel rotating half cycle or the sum of T and T 'is taken as the time of the counter wheel rotating one cycle), and the rotating speed of the counter wheel can be calculated to be 1/(T+T').
It should be noted that, in the above two cases, the two sets of hall sensors are symmetrically distributed, if the two sets of hall sensors are not symmetrically distributed, for example, form an included angle of 90 °, for a person skilled in the art, the time difference between the falling edges of two adjacent counting pulses of the first hall pulse signal Y1 and the second hall pulse signal Y2 is 1/4 of the time of one revolution of the counter character wheel (3/4 of the time of one revolution of the counter character wheel if the rotation directions are opposite), and the time of one revolution of the counter character wheel and the rotation speed thereof can be calculated.
In another embodiment, when the hall counting device in the above embodiment is used for a gas meter, abnormal data of the gas meter may be identified, as shown in fig. 10, and the specific method is as follows:
s100: determining a gas flow rate by the first hall pulse signal and the second hall pulse signal
When the Hall counting device is used for a gas meter, the flow of each circle of counter character wheel is assumed to be V 0 In the case of ideal performance of the hall counter, the flow rate of the gas meter per unit time can be calculated as v=s·v by directly using the time difference Δt between the falling edges of two adjacent counter pulses 0 Where S is the rotational speed of the counter wheel s=1/(2Δt).
In the case where the performance of the hall counting device is not fully ideal, the flow velocity v=v of the gas meter can still be calculated by the above-described calculation method 0 /(T+T’)。
S200: if the gas flow rate exceeds the maximum gas flow rate or the gas flow rate in a certain time range exceeds a first threshold value, identifying that the gas is over-flowing abnormal; in this case, it means that the user gas usage exceeds the normal usage value.
If the flow rate of the fuel gas is basically unchanged within a certain time range, identifying that the gas consumption is abnormal due to overtime; under the condition that the gas consumption does not accord with the conventional habit of the user, the user is possibly not turned off for a long time, and the condition needs to be identified to remind the user to pay attention to ensure the gas use safety.
In the above case, a plurality of gas flow rate levels that time out with gas may be defined first, and the maximum duration of each level is specified. Specifically, when the abnormal event of gas utilization timeout occurs and is stabilized at a certain level, starting timing, if the level changes (the action of manually adjusting the fire is indicated), resetting the timing, and if the timing reaches the maximum duration corresponding to the level, recognizing that the gas utilization timeout occurs, at this time, reminding a client, such as an alarm or pushing information to a mobile phone.
And if the gas flow rate is smaller than a second threshold value within a certain time range, identifying that the gas micro-leakage is abnormal. This is mainly the case when the gas line is broken or the joint loosens, causing the gas to leak outwards at a small flow rate, and when the abnormality continues to occur within a certain time range, a slight leakage event is identified. In the micro-leakage event, the second threshold is set relatively small.
As shown in fig. 11, the present embodiment provides a gas abnormal data identification apparatus including a gas flow rate determination module and a gas abnormal data identification module.
The fuel gas flow rate determining module determines the fuel gas flow rate according to the first Hall pulse signal and the second Hall pulse signal.
The gas abnormal data identification module is used for judging the type of the gas abnormal data, and specifically comprises an overcurrent abnormal judgment module, a timeout abnormal judgment module and a micro leakage abnormal judgment module. The overcurrent abnormality judging module is used for judging whether the gas flow rate exceeds the maximum gas flow rate or whether the flow rate in a certain time range exceeds a first threshold value, and if so, identifying the gas overcurrent abnormality signal; the overtime abnormal judging module is used for judging whether the air flow rate of the internal combustion engine basically keeps unchanged in a certain time range, and if so, the internal combustion engine is identified as abnormal overtime; the micro leakage abnormality judging module is used for judging whether the air flow rate of the internal combustion engine is smaller than a second threshold value within a certain time range, and if so, the micro leakage abnormality judging module is used for identifying the micro leakage abnormality of the fuel gas.
As shown in fig. 12, the present embodiment further provides a gas abnormal data identification system, which includes at least one processor 91 (processor), a communication interface 92 (Communications Interface), a memory 93 (memory) and a communication bus 94, wherein the processor 91, the communication interface 92 and the memory 93 complete communication with each other through the communication bus 94. The processor 91 may call logic instructions in the memory 93 to perform the gas abnormal data identification method in any of the embodiments described above.
The logic instructions in the memory 93 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In addition, referring to the schematic structural diagram of the embodiment shown in fig. 13, the storage medium 10 includes a computer program 101 stored thereon, and the computer program 101 can be executed to implement the method for identifying abnormal fuel gas data provided by any one or any non-conflicting combination of the above embodiments. Wherein the capacity of the storage medium 10 is dimensioned to meet the requirements for storing a computer program.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Moreover, the present application may take the form of a computer program product embodied on one or more storage media 10 (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
The first threshold is determined from a stable peak in the gas meter history over a time range.
The Hall counting device, the gas abnormal data identification method and the related equipment provided by the application are described in detail. The description of the specific embodiments is only intended to facilitate an understanding of the method of the present application and its core ideas. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.
Claims (10)
1. A hall counting device for a gas meter, comprising:
the counter character wheel is provided with two groups of magnetic steels, and the polarities of one ends of the two groups of magnetic steels facing the outer side are opposite;
the two groups of bipolar double-output Hall sensors are arranged at positions which are close to the positions where the magnetic steel passes when the counter character wheel rotates, and when one pole of the Hall sensor is triggered by the magnetic steel on the counter character wheel, the Hall sensor correspondingly outputs a low-level signal, and after the trigger disappears, the Hall sensor keeps outputting a high-level signal; wherein the method comprises the steps of
The N-level output signals of the first group of Hall sensors and the S-level output signals of the second group of Hall sensors output first Hall pulse signals through a first OR gate;
the S-level output signals of the first group of Hall sensors and the N-level output signals of the second group of Hall sensors output second Hall pulse signals through a second OR gate;
the S-level output signals of the first group of Hall sensors and the S-level output signals of the second group of Hall sensors output first magnetic interference identification signals through a third OR gate;
the N-level output signals of the first group of Hall sensors and the N-level output signals of the second group of Hall sensors output a second magnetic interference identification signal through a fourth OR gate;
and determining the rotation times of the counter character wheel according to the first Hall pulse signal, the second Hall pulse signal and the counting circuit.
2. The hall counting device according to claim 1, wherein two sets of the magnetic steels are symmetrically arranged on both sides of the outer diameter edge of the counter character wheel.
3. The hall counting device according to claim 1, wherein two sets of hall sensors are symmetrically arranged on both sides of a counter wheel.
4. A gas meter comprising a hall counter device according to any one of claims 1 to 3.
5. A method for identifying abnormal gas data using the gas meter of claim 4, comprising:
determining the gas flow rate through the first Hall pulse signal and the second Hall pulse signal;
if the gas flow rate exceeds the maximum gas flow rate or the gas flow rate in a certain time range exceeds a first threshold value, identifying that the gas is over-flowing abnormal;
if the flow rate of the fuel gas is basically unchanged within a certain time range, identifying that the gas consumption is abnormal due to overtime;
and if the gas flow rate is smaller than a second threshold value within a certain time range, identifying that the gas micro-leakage is abnormal.
6. The method for identifying abnormal gas data according to claim 5, wherein determining the flow rate of the gas by the first hall pulse signal and the second hall pulse signal specifically comprises:
determining the rotation speed of a counter character wheel according to the pulse time difference between the first Hall pulse signal and the second Hall pulse signal;
and determining the gas flow rate of the gas meter according to the rotation speed.
7. The method for identifying abnormal gas data according to claim 5, wherein the specific method for identifying abnormal gas consumption overtime is as follows:
defining a plurality of gas flow rate levels and defining a maximum duration for each level;
when the flow rate of the fuel gas is stabilized at a certain level, starting timing, if the level is changed, re-timing, and when the timing length reaches the maximum duration corresponding to the level, identifying that the gas consumption is abnormal.
8. A gas abnormal data identification device, characterized by comprising:
the fuel gas flow rate determining module is used for determining the fuel gas flow rate according to the first Hall pulse signal and the second Hall pulse signal;
the gas abnormal data identification module is used for judging the type of the gas abnormal data, and identifying the gas abnormal data as a gas overcurrent abnormal signal if the gas flow rate exceeds the maximum gas flow rate or if the flow rate in a certain time range exceeds a first threshold value; if the flow rate of the fuel gas is basically unchanged within a certain time range, identifying that the gas consumption is abnormal due to overtime; and if the gas flow rate is smaller than a second threshold value within a certain time range, identifying that the gas micro-leakage is abnormal.
9. A gas abnormal data identification system, comprising:
one or more processors;
a memory for storing one or more programs,
when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the gas anomaly data identification method of any one of claims 5-7.
10. A computer storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements the gas abnormal data identification method of any one of claims 5 to 7.
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