CN112129383A - Pulse metering test device and test method for intelligent meter scheme board - Google Patents
Pulse metering test device and test method for intelligent meter scheme board Download PDFInfo
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- CN112129383A CN112129383A CN202011023047.1A CN202011023047A CN112129383A CN 112129383 A CN112129383 A CN 112129383A CN 202011023047 A CN202011023047 A CN 202011023047A CN 112129383 A CN112129383 A CN 112129383A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
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Abstract
The invention provides a pulse metering test device and a test method of a smart meter scheme board, wherein the pulse metering test device comprises a micro control unit and a plurality of pulse output circuits; the micro control unit is provided with pulse signals of a plurality of modes; the pulse signal of each mode comprises the number of paths of the pulse signal, the pulse width and the pulse frequency of each path of the pulse signal; the pulse output circuit comprises a switch and an output isolation relay which are connected in sequence; the micro control unit controls the pulse output circuit to output pulse signals or not to output the pulse signals by controlling the on or off of a switch in the pulse output circuit. The pulse metering testing device of the intelligent meter scheme board can complete the test without assembling the scheme board into a whole table. And multiple pattern boards can be tested simultaneously. The testing efficiency is improved, no noise is generated, and the office environment is not influenced.
Description
Technical Field
The invention relates to the technical field of detection, in particular to a pulse metering testing device and a pulse metering testing method for a scheme board of an intelligent meter.
Background
The scheme board, namely the circuit board, is an important component of the intelligent meter. The water meter and the gas meter are two main meters, and are hereinafter referred to as water meters and gas meters. The solution board of the water and gas meter needs to be subjected to a pulse metering test after being designed and manufactured. Because the intelligent water-gas meter has huge user quantity, the market demand is huge. The water and gas meter manufacturing enterprises need to efficiently and quickly develop and test water and gas meter products, and how to efficiently and quickly test the scheme board of the water and gas meter becomes a great challenge. At present, pulse measurement test cannot be directly carried out on a scheme board of a water-gas meter, and a commonly adopted method is to assemble the scheme board and various measurement sensors such as a reed switch, a Hall sensor or a non-magnetic measurement sensor into a whole meter to carry out pulse measurement test. The complete table test has several problems:
1. the whole table test has no way to quickly simulate the pulse jitter and pulse width variation of various metering sensors, so that the pressure and critical point test of the chopping board cannot be carried out.
2. The whole-table test can only be used for installing one pattern board on one table and testing one pattern board independently. There is no way to allow several or even more than ten recipe boards to simultaneously collect pulses from one metrology sensor, thereby failing to achieve the goal of batch verification of recipe board consistency.
3. The whole meter test has no way to quantify the pulse width of the metering pulse and the change condition of the pulse jitter of the water meter under the environments of different water flow, different water pressure and different water hammer, so that the field problems can not be avoided in the research and development stage in a full scene.
4. In order to let the whole meter walk the number, the fan is needed to simulate the water flow, and the fan blows the water meter to walk the number, so that huge noise is generated, and the office environment is influenced.
Disclosure of Invention
The invention aims to provide a pulse metering test device and a pulse metering test method for a chopping board of an intelligent meter, and solves a series of problems caused by the fact that the chopping board cannot be directly subjected to pulse metering test in the prior art and needs to be assembled into a whole meter test.
The purpose of the invention is realized by the following technical scheme:
in a first aspect, the invention provides a pulse metering test device of a smart meter scheme board, which comprises a micro control unit and a plurality of pulse output circuits; the micro control unit is provided with pulse signals of a plurality of modes; the pulse signal of each mode comprises the number of paths of the pulse signal, the pulse width and the pulse frequency of each path of the pulse signal; the pulse output circuit comprises a switch and an output isolation relay which are connected in sequence; the micro control unit controls the pulse output circuit to output pulse signals or not to output the pulse signals by controlling the on or off of a switch in the pulse output circuit.
Furthermore, the pulse metering test device of the intelligent meter scheme board also comprises a display module and a setting module; the display module comprises an LCD display screen, and the setting module comprises a matrix keyboard; the mode of the pulse signal is selected through the matrix keyboard, and the pulse width and the pulse frequency of each pulse signal in the mode are set and displayed on the LCD display screen.
Furthermore, the pulse metering test device of the intelligent meter scheme board also comprises a pulse output state display module; the pulse output state display module comprises a plurality of LED lamps, and each LED is used for displaying whether a pulse signal output by each pulse output circuit is normal or not.
Furthermore, a pulse acquisition port of at least one of the chopping boards of the same type is connected to an output end of the pulse output circuit, and acquires a pulse signal output by the pulse output circuit for performing pulse test on the chopping board.
Furthermore, the pulse width and the pulse frequency of each path of pulse signal in a certain mode are modified through a setting module, so that the purpose of simulating different working environments is achieved.
In a second aspect, the present invention provides a pulse metering test method for a smart meter solution board, comprising the following steps:
step S1, setting pulse signals of various modes and storing the pulse signals into a micro control unit;
s2, selecting a pulse signal mode according to the type of the pattern board to be tested, and outputting a pulse signal;
and step S3, respectively acquiring the pulse signals output by the pulse metering test device through the pulse acquisition port of at least one to-be-tested pattern board, and completing the pulse metering test of the pattern board.
Further, the pulse signal of each mode includes the number of paths of the pulse signal, the pulse width and the pulse frequency of each path of the pulse signal.
Furthermore, the pulse width and the pulse frequency of each path of pulse signal in a certain mode are modified through a setting module, so that the purpose of simulating different working environments is achieved.
The pulse metering test device and the test method of the intelligent meter scheme board can complete the test without assembling into a whole table, and can simultaneously test a plurality of scheme boards. The testing efficiency is improved, no noise is generated, and the office environment is not influenced.
Drawings
FIG. 1 is a schematic structural diagram of a pulse metering test device of a smart meter solution board according to the present invention;
FIG. 2 is a pattern of pulse signals output by a meter sensor of a non-inverted water meter including 2 Hall sensors;
FIG. 2 is a schematic diagram of the pulse signal output by the meter sensor of a water meter without a reverse meter function that includes 2 Hall sensors;
FIG. 3 is a pattern of pulse signals output by the meter sensors of a water meter with a reverse meter function including 2 Hall sensors;
FIG. 4 is a pattern of pulse signals output by the meter sensors of a water meter with a reverse meter function including 3 Hall sensors;
FIG. 5 shows a mode of outputting a pulse 1 by a non-magnetic water meter sensor;
FIG. 6 shows a pattern of output pulses 2 of a non-magnetic water meter sensor;
fig. 7 is a schematic working flow diagram of the pulse metering testing device of the smart meter solution board of the present invention.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The invention provides a pulse metering test device of a smart meter scheme board, which is shown in figure 1. The device comprises a Micro Control Unit (MCU) and a three-way pulse output circuit. The micro control unit MCU is provided with pulse signals of a plurality of modes. Each mode comprises the set number of paths of the pulse signals, the pulse width and the pulse frequency of each path of the pulse signals. Each pulse output circuit comprises a switch and an output isolation relay. The MCU controls the mode of the output pulse signal, and controls each path of pulse output circuit to output the pulse signal or not to output the pulse signal by controlling the on or off of the switch of the pulse output circuit. And the pulse acquisition port of the to-be-tested scheme board is connected to the output end of the three-way pulse output circuit. And if the plurality of to-be-tested pattern boards are the to-be-tested pattern boards, the pulse acquisition ports of the to-be-tested pattern boards are respectively connected to the output ends of the three pulse output circuits. The number of paths of the pulse output circuit should not be construed as a limitation of the present invention. In this embodiment, for convenience of description, a three-way pulse output circuit is selected. The pulse signals of various modes are written into the MCU through the USB port by using the upper computer software, and the mode of the pulse signal to be output can also be selected through the upper computer software. If the mode of the pulse signal is to be modified, or the number of paths of the pulse signal in a certain mode, the pulse width or the pulse frequency of each path of the pulse signal are modified, the modified data can be rewritten into the MCU through the USB port by using the software of the upper computer.
The main functions of the output isolation relay are signal isolation, interference prevention and expansion of the contact capacity of the micro control unit.
Preferably, the pulse metering test device of the smart meter solution board of the present invention further comprises a display module and a setting module. The display module comprises an LCD display liquid crystal screen, and the setting module comprises a matrix keyboard. The mode of the pulse signal is selected through the matrix keyboard, and the pulse width and the pulse frequency of each path of pulse signal in the mode are set and are visually and clearly displayed on the LCD. The setting module can more conveniently and quickly select the modes and modify the pulse width or the pulse frequency value of the pulse signal in each mode, and is more convenient and quick than a mode of rewriting through software.
Preferably, the pulse metering test device of the smart meter solution board of the present invention further comprises a pulse output state display module. The pulse output state display module comprises 3 LED lamps and is used for displaying whether the pulse signals output by each pulse output circuit are normal or not. Also, the number of LEDs, etc. cannot be used to limit the invention L. The number of EDs and the like may be the same as the number of pulse output circuits.
The mode of the pulse signal is related to the type of the water-gas meter, and one type corresponds to one mode. The number of paths, pulse width and pulse frequency of pulse signals in each mode are obtained by summarizing and organizing the closing cycles and the jitter rules of metering sensors such as reed switches, Hall sensors or non-magnetic metering sensors of different types of water meters under different water flows, different water pressures and different water hammer environments. The pulse condition of the water meter working in different environments is fully considered, and the pressure and critical point test on the scheme board of the water-gas meter can be realized.
The modes of the pulse signals corresponding to different types of water meter gas meters are different. After induction and arrangement, pulse signals in various modes of fig. 2 to fig. 6 are obtained. Fig. 2 is a pattern of pulse signals output by a non-reversal water meter metering sensor including 2 hall sensors, wherein the pulse signals include two paths of pulse signals, namely a pulse and B pulse. If a pulse test is to be performed on a scenario board without a counter-rotating water meter that includes 2 hall sensors, the pulse mode shown in fig. 2 is selected, assuming mode 1. Fig. 3 shows the output pulse pattern of the water meter sensor with the hall tape inversion metering function, which is assumed to be pattern 2. Mode 2 is selected if a pulse metering test is to be performed on a scenario board of a water meter with a reverse metering function that includes 2 hall sensors. Mode 2 also includes two pulse signals, but with a pulse width different from that of mode 1. If pulse signals under various environments need to be simulated, the environment can be converted only by adjusting the pulse width and the pulse frequency of the pulse signals. The mode of the pulse signal is written into the MCU in advance through the USB port of the pulse metering test device by the external equipment. In actual use, a proper mode is selected through the matrix keyboard according to the type of the water-gas meter to which the scheme board to be tested belongs. And under the mode that only two paths of pulse signals are output, the MCU controls the switch of the third path of pulse output circuit to be switched off, and the third path of pulse output circuit does not output pulse signals. The pulse width and the pulse frequency of each pulse signal in the mode written initially in the MCU are obtained through induction and arrangement, and in actual use, the pulse width and the pulse frequency of the pulse signal in each mode can be reset by using a setting module of a scheme board according to actual conditions.
Fig. 4 is a pattern of output pulse signals of the metering sensor of the water meter with the counter-rotating metering function including 3 hall sensors. The pulse signal comprises 3 paths of pulse signals, namely an A pulse, a B pulse and a C pulse. The pulse patterns are not limited to those shown in fig. 2-6, and the number and type of pulse patterns should not be construed as limiting the invention.
The invention adopts the mode of MCU + small signal output isolation relay to simulate the pulse closing and shaking of the intelligent water meter under different working conditions, and adopts the man-machine interaction mode of LCD display and matrix keyboard to select the output mode, thereby achieving the purpose of rapidly switching and outputting pulse signals with different quantities, different pulse widths and different pulse frequencies.
The invention can simulate the pulse output of the metering sensor under different scenes, selects various types preset in the MCU in advance through the matrix keyboard, and then outputs the various types to the pulse acquisition port of the water-gas meter scheme board through the I/O port and the pulse output circuit of the MCU.
The invention can test the water-gas surface pattern plates in batch, and can use the same group of pulses to connect several or dozens of modules in parallel through the output isolation relay for simultaneous test.
The invention can accurately calculate the number of output pulses. The MCU is used for accurately measuring the sent pulse frequency and displaying the sent pulse frequency and the accumulated amount of the simulated water leakage on the LCD, so that a user can conveniently check whether the scheme board has the lost pulse number.
The working flow of the pulse metering testing device of the intelligent meter scheme board is shown in fig. 7, and the working principle is as follows:
setting parameters during first power-on:
and writing pulse signals of various modes into the MCU through the USB port by using upper computer software, setting water meter parameters of pulse output and storing the parameters into the FLASH, and facilitating selection of pulse parameters to be output through a 4-by-4 matrix keyboard during subsequent testing.
Pulse parameter modification at start of run/during run:
the explanation will be given by taking the 3-way pulse signal shown in fig. 4 as an example. After the pulse metering test device is powered on, the matrix keyboard, the pulse output state display module and each pulse output circuit are initialized. And then reading the mode of the pulse signal in the memory FLASH of the MCU, and selecting the mode corresponding to the to-be-tested scheme board. Default pulse signal parameters are set in each mode, and the default pulse signal parameters comprise the number of paths of pulse signals, the pulse width and the pulse frequency of each path of pulse signals. And clicking a start button to output a pulse signal according to a selected mode, and sequentially outputting an A pulse, a B pulse and a C pulse according to default parameters and continuously cycling back and forth. And keeping the high level of the pulse A, the pulse B and the pulse C according to the set time length. The high level ranges from 10mS to 90S. Then A outputs 50Hz shaking pulses, pulse number range: 0 to 200. Then hold low, low hold range: 10MS to 90S. Then outputting shaking pulses, the pulse number range: 0 to 200. And then remains high 10MS to 90S. At this time, the B pulse repeats the operation of the a pulse and thereafter maintains the high level. And finally, the pulse C repeats the action of the pulse A and then returns to a high level state, and the pulse A, the pulse B and the pulse C respectively output a low pulse in sequence at the moment, so that a complete metering period is completed. When the A pulse is at a high level, the corresponding LED lamp is lighted. When the B pulse is at a high level, the corresponding LED lamp is turned on. When the C pulse is at a high level, the corresponding LED lamp is turned on. When the pulse metering and testing device continuously and circularly outputs the pulse signals, the water-gas meter pattern board can continuously obtain the input pulse signals, so that the aim of simulating the water meter to output the pulse signals by using the electronic pulse generator is fulfilled, the water-gas meter pattern board is tested in batch, and the testing efficiency is improved. The pulse output of the water meter under various environments can be simulated, so that the pressure and critical point test can be carried out on the chopping board, and the problems caused by different working environments can be avoided in the research and development stage. Meanwhile, a fan is not needed to blow the water meter, and the noise influence is eliminated.
If the working environment of the simulated water meter needs to be changed, the pulse width and the pulse frequency of each pulse signal need to be modified. At the moment, a stop button is pressed, then the water meter type is selected through a 4 x 4 matrix keyboard, then the high-low level width and the frequency of A pulse, B pulse and C pulse are input, parameters are stored in a flash by pressing a confirmation key after setting, and parameter modification is completed. And then pressing a start key, and starting the metering test equipment to output pulses according to the modified parameters. The pulse metering test device can only output pulse signals of one mode at the same time, and test the pulse metering of the scheme board of the same type under the same working environment. If the pulse measurement of the scheme board of the same type under different working environments needs to be tested, or the pulse measurement of the scheme board of different types under the same environment needs to be tested, the mode needs to be reselected after the test is finished, or the parameters of the pulse signal need to be reset, and then the test is started.
The invention discloses a pulse metering test method of a smart meter scheme board, which comprises the following steps:
and step S1, setting pulse signals of various modes and storing the pulse signals into a FLASH memory FLASH of the micro control unit.
The pulse signal of each mode comprises parameters such as the number of paths of the pulse signal, the pulse width and the pulse frequency of each path of the pulse signal and the like. The parameters are obtained by analyzing and researching, summarizing and generalizing pulse signals of different types of water-gas meters under different working environments and are default parameters.
And step S2, selecting the mode of the pulse signal according to the type of the pattern board to be tested, and outputting the pulse signal.
The type of the scheme board to be tested is the type of the water-gas meter to which the scheme board to be tested belongs. Each type of scheme board to be tested corresponds to a mode of pulse signals. For example, a water meter without inversion, which includes 2 hall sensors, corresponds to the mode shown in fig. 2, and includes two pulse signals, and parameters of pulse width and pulse frequency of each pulse signal are default values.
And step S3, respectively acquiring the pulse signals output by the pulse metering test device through the pulse acquisition port of at least one to-be-tested pattern board, and completing the pulse metering test of the pattern board.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The above description is for the purpose of illustrating embodiments of the invention and is not intended to limit the invention, and it will be apparent to those skilled in the art that any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the invention shall fall within the protection scope of the invention.
Claims (8)
1. The pulse metering test device of the intelligent meter scheme board is characterized by comprising a micro control unit and a plurality of pulse output circuits; the micro control unit is provided with pulse signals of a plurality of modes; the pulse signal of each mode comprises the number of paths of the pulse signal, the pulse width and the pulse frequency of each path of the pulse signal; the pulse output circuit comprises a switch and an output isolation relay which are connected in sequence; the micro control unit controls the pulse output circuit to output pulse signals or not to output the pulse signals by controlling the on or off of a switch in the pulse output circuit.
2. The pulse metering test device of the intelligent meter scheme board as claimed in claim 1, further comprising a display module and a setting module; the display module comprises an LCD display screen, and the setting module comprises a matrix keyboard; the mode of the pulse signal is selected through the matrix keyboard, and the pulse width and the pulse frequency of each pulse signal in the mode are set and displayed on the LCD display screen.
3. The pulse metering testing device of the intelligent meter scheme board as claimed in claim 1, further comprising a pulse output state display module; the pulse output state display module comprises a plurality of LED lamps, and each LED is used for displaying whether a pulse signal output by each pulse output circuit is normal or not.
4. The pulse metering and testing device of the intelligent meter scheme board as claimed in claim 1, wherein the pulse acquisition port of at least one scheme board of the same type is connected to the output end of the pulse output circuit, and acquires the pulse signal output by the pulse output circuit for performing pulse testing on the scheme board.
5. The pulse metering and testing device of the intelligent meter scheme board as claimed in claim 2, wherein the pulse width and pulse frequency of each pulse signal in a certain mode are modified by a setting module to achieve the purpose of simulating different working environments.
6. The pulse metering test method of the intelligent meter scheme board is characterized by comprising the following steps:
step S1, setting pulse signals of various modes and storing the pulse signals into a micro control unit;
s2, selecting a pulse signal mode according to the type of the pattern board to be tested, and outputting a pulse signal;
and step S3, respectively acquiring the pulse signals output by the pulse metering test device through the pulse acquisition port of at least one to-be-tested pattern board, and completing the pulse metering test of the pattern board.
7. The pulse metering test method of the intelligent meter scenario board of claim 6, wherein the pulse signal of each mode comprises a number of paths of the pulse signal, a pulse width and a pulse frequency of each path of the pulse signal.
8. The pulse metering test method of the intelligent meter scheme board as claimed in claim 6, wherein the pulse width and pulse frequency of each pulse signal in a certain mode are modified by a setting module to achieve the purpose of simulating different working environments.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113625153A (en) * | 2021-08-10 | 2021-11-09 | 上海桑锐电子科技股份有限公司 | Batch testing device for water-gas meter chopping boards |
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| JPH01227021A (en) * | 1988-03-08 | 1989-09-11 | Tokyo Riyousuiki Kogyosho:Kk | Method and apparatus for testing flowmeter and displacement meter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113625153A (en) * | 2021-08-10 | 2021-11-09 | 上海桑锐电子科技股份有限公司 | Batch testing device for water-gas meter chopping boards |
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