CN207180796U - Flowmeter high-resolution based on linear magnetic sensor counts conversion equipment - Google Patents
Flowmeter high-resolution based on linear magnetic sensor counts conversion equipment Download PDFInfo
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- CN207180796U CN207180796U CN201721091222.4U CN201721091222U CN207180796U CN 207180796 U CN207180796 U CN 207180796U CN 201721091222 U CN201721091222 U CN 201721091222U CN 207180796 U CN207180796 U CN 207180796U
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- magnetic sensor
- linear magnetic
- magnet steel
- great wheel
- circuit board
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 56
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 41
- 239000010959 steel Substances 0.000 claims abstract description 41
- 238000010276 construction Methods 0.000 abstract description 2
- 230000005292 diamagnetic effect Effects 0.000 abstract 1
- 239000012528 membrane Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 230000002238 attenuated effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000005404 monopole Effects 0.000 description 1
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Abstract
It the utility model is related to a kind of flowmeter high-resolution based on linear magnetic sensor and count conversion equipment.It is characterized in that including counting frame, counter, drive gear and linear magnetic sensor, counter and drive gear are arranged on counting frame, the great wheel of driving gear drives counter, two opposite polarity magnet steel are provided with great wheel, the center of circle of two magnet steel and great wheel is located along the same line, and a collecting circuit board is set on the tangent line below great wheel, collecting circuit board is arranged on counting frame, linear magnetic sensor is arranged on collecting circuit board, and linear magnetic sensor is engaged with two magnet steel.The utility model can improve the resolution ratio gathered in real time, while the device can position to the numeral of character wheel, possess the characteristics of diamagnetic interference performance is strong, and cost is low, simple in construction, be particularly suitable for use in collection demand of the cut-out type membrane type flowmeter to tiny flow quantity.
Description
Technical field
It the utility model is related to a kind of flowmeter high-resolution based on linear magnetic sensor and count conversion equipment.
Background technology
Largely in the cut-out type flowmeter used on Vehicles Collected from Market, typically by carrying out electro mechanical transformation with counter to table,
Read the character wheel count value of table counter.Common mode has：（1）One magnet steel of increase is taken turns in counter second, using dry
Huang pipe or magnetic switch are counted, and count resolution is third round unit indicating value；If magnet steel is arranged on counter great wheel, count
Resolution ratio is the second wheel unit indicating value；（2）Transformation second takes turns to the 8th wheel character wheel and uses photovoltaic principals direct-reading；（3）Use image
Direct-reading identification second takes turns to the 8th wheel.More than（2）（3）Method typically avoids great wheel, because great wheel can be in random angle when static
Degree, the numerical value on character wheel are typically not at positive display location, and can all be in display center when other character wheels are static, be easy to light
Electricity or image are handled.3 kinds of methods of the above only up to arrive second indicating value unit value, example to the acquisition resolution of counter
Civilian flowmeter counter indicating value end position is 0.001 side as, and above method highest is only capable of reaching 0.01 side, actually more
Number producers intelligence meter reading resolution ratio is generally 0.1 side, continues the unusual condition of tiny flow quantity leakage for combustion gas, above structure without
Method meets collection demand.
Utility model content
For problems of the prior art, the purpose of this utility model is that providing one kind is based on linear magnetic sensor
Flowmeter high-resolution count conversion equipment technical scheme.
The described flowmeter high-resolution based on linear magnetic sensor counts conversion equipment, it is characterised in that including counting
Frame, counter, drive gear and linear magnetic sensor, counter and drive gear are arranged on counting frame, and drive gear drives
The great wheel of dynamic counter, is provided with two opposite polarity magnet steel in great wheel, and the center of circle of two magnet steel and great wheel is located at always
On line, a collecting circuit board is set, collecting circuit board is arranged on counting frame, and linear magnetic sensor is set on the tangent line below great wheel
Put on collecting circuit board, linear magnetic sensor is engaged with two magnet steel.
The described flowmeter high-resolution based on linear magnetic sensor counts conversion equipment, it is characterised in that described linear
Magnetic Sensor connection sets an AD conversion unit, and AD conversion unit is arranged on display control circuit plate.
The described flowmeter high-resolution based on linear magnetic sensor counts conversion equipment, it is characterised in that described two
Magnet steel is separately positioned on the digit position of great wheel.
The described flowmeter high-resolution based on linear magnetic sensor counts conversion equipment, it is characterised in that described two
Magnet steel is separately positioned on 2 and 7 two digit positions of great wheel.
The described flowmeter high-resolution based on linear magnetic sensor counts conversion equipment, it is characterised in that described two
Magnet steel is separately positioned on 3 and 8 two digit positions of great wheel.
The utility model is provided with two opposite polarity magnet steel in great wheel, and the center of circle of two magnet steel and great wheel is positioned at same
On one straight line, a collecting circuit board is set, collecting circuit board is arranged on counting frame, linear magnetic sensing on the tangent line below great wheel
Device is arranged on collecting circuit board, and linear magnetic sensor is engaged with two magnet steel, and two magnet steel are separately positioned on the number of great wheel
Word location（Such as 2 and 7）, the position that two magnet steel are placed can arbitrarily choose, by being obtained and character wheel after the signal transacting that collects
Numerical relation, safety assurance ability of the cut-out type flowmeter when lasting low discharge is revealed can be strengthened.
The utility model can improve the resolution ratio gathered in real time, while the device can position to the numeral of character wheel, possess anti-
Magnetic disturbance ability is strong, and cost is low, it is simple in construction the characteristics of, be particularly suitable for use in collection of the cut-out type diaphragm gas meter to tiny flow quantity
Demand.
Brief description of the drawings
Fig. 1 is counter structure schematic diagram；
Fig. 2 is counter side structure schematic diagram；
Fig. 3 is magnet steel scheme of installation；
Fig. 4 is character wheel rotary magnetic field waveform；
In figure：1- counting frames, 2- counters, 3- drive gears, 4- collecting circuit boards, 5- great wheels, 6- magnet steel.
Embodiment
With reference to Figure of description, the utility model is described in further detail：
Flowmeter high-resolution based on linear magnetic sensor counts conversion equipment, including counting frame 1, counter 2, driving
Gear 3 and linear magnetic sensor, counter 2 and drive gear 3 are arranged on counting frame 1, the actuation counter of drive gear 3
Great wheel 5, two opposite polarity magnet steel 6 are provided with great wheel 5, have optimal collection to identify using 2 opposite polarity magnet steel
Effect, two magnet steel 6 and the center of circle of great wheel 5 are located along the same line, and follow great wheel to rotate, one is set on the tangent line below great wheel
Collecting circuit board 4, collecting circuit board 4 are arranged on counting frame 1, and linear magnetic sensor is arranged on collecting circuit board 4, linear magnetic
Sensor is engaged with two magnet steel.
Linear magnetic sensor connection sets an AD conversion unit, and AD conversion unit is arranged on display control circuit plate, shows
Show in control board be each flowmeter basic composition, will not be repeated here.
Specifically, two magnet steel are separately positioned on the digit position of great wheel, and the position that 2 magnet steel are placed can arbitrarily be chosen,
By obtaining the numerical relation with character wheel after the signal transacting that collects.
Preferably, two magnet steel are separately positioned on 2 and 7 two digit positions of great wheel, now collecting circuit board is set
On the lower section tangent line of numeral 2.When digital 2 station acquisitions are to most strong monopole magnetic signal, numeral that counter is just above being shown
It is just 0, this process is referred to as numeral 0 and positioned, and when collecting most strong opposite polarity magnetic field, the numeral of counter front display is just
For 5.
Preferably, two magnet steel are separately positioned on 3 and 8 two digit positions of great wheel, now collecting circuit board is set
On the lower section tangent line of numeral 3.
The principle of this programme acquisition method is as follows：Liquid crystal is added up into registration during Default Value to be set to show with mechanical counter
Number is identical, and when flowmeter just conventional gas, counter great wheel drives internal 2 magnet steel to rotate, and linear magnetic sensor collects most
Strong N pole fields, N poles magnet steel are gradually attenuated to 0, the midpoint that the numeral of counter front display is 2 and 3, and subsequent S pole fields are gradual
Increase, it is 5 to reach the numeral shown during maximum, and subsequent S pole fields are gradually attenuated to 0, and the numeral of display is 7 and 8 midpoint,
Because 2 magnet steel are different apart from linear magnetic sensor distance, the magnetic field intensity collected is different with direction, passes through timing acquiring magnetic
Field size and direction, the changes of magnetic field of 2 collections, by comparing look-up table, can determine whether out the display of current character wheel before and after judgement
Position；For ease of identification, the timing of timing acquiring should be less than the time that great wheel rotates half cycle.
Embodiment：As shown in Fig. 2 in great wheel（Fig. 2）The digit position of inner side outer wall corresponding 2,7 places axial direction and magnetic pole phase
Anti- magnet steel, collecting circuit board is placed close to character wheel edge below 2 number words, sets linear magnetic to sense on collecting circuit board
Device, when normal ventilation, character wheel is rotated in the clockwise direction, when the magnet steel at 2 number words is close to lower section collecting circuit board, line
Property Magnetic Sensor collect most strong N pole fields, the indicating value of corresponding counter great wheel is ' 0 ', and when continuing ventilation, 3 number words are swept
The collecting circuit board of lower section is crossed, because magnet steel is remote, the N pole fields that linear magnetic sensor collects linearly are decayed, and work as operation
During collecting circuit board inswept to 4,5 number words, magnetic field 0；Subsequent S pole fields are because No. 7 position magnet steel of distance are more and more nearer, S
Gradually extreme value arrive in enhancing to pole field, and the indicating value of corresponding counter great wheel is ' 5 ', when running to 9, the 0 inswept Acquisition Circuit of number word
During plate, S pole fields are gradually attenuated to 0.Such repeat count, if what is detected is not this sequence, magnetic disturbance be present.This
Sample substantially increases antijamming capability, for the counter of 0.001 side, reachable 0.001 side of tiny flow quantity acquisition resolution subdivision,
By judging that the most high-intensity magnetic field in 2 directions is once measured, real-time accuracy is 0.01 side.
Due to 2 magnet steel according to the existing market universal standard its magnetic field intensity error up to 30%, therefore should not directly use
Gathered data, which table look-up, draws character wheel position, and so production needs separate unit to calibrate, and complex process is impracticable.Therefore algorithm is needed
Gathered data is analyzed and avoids using absolute data values.
Specific algorithm is as follows：
AD conversion unit interval 50ms is acquired to current magnetic field, to the data A and the data M0 of last time collection of collection
It is compared, if gathered data is more than a/d converter and the overall error of Magnetic Sensor, it is believed that data are effective, are included in M1；Otherwise
Abandon, and so on record magnet steel tables of data MN, wherein N numbers of poles are according to being negative value, and S is extremely just.
Tables of data MN takes following steps to build：
Step 1：Judge whether gathered data is more than 1.5 times of the magnet extreme value, more than being then judged to magnetic disturbance, less than then holding
Row step 2；
Step 2：Judge current collection value and last time collection value variation tendency, continuous several times collection value is increase, then character wheel
It is 1-5 in upper half-turn, is ascending curve section in oscillogram；Continuous several times collection value is reduces, then character wheel is in lower branch
6-0, it is decline curve section in oscillogram；
When character wheel is in upper half-turn, current gathered data is smaller than last time collection, when subsequent continuous several times reduce, judges character wheel
Turning over S pole field maximum MAXS, i.e. peak value in oscillogram, then current character wheel is 5,
Likewise, when character wheel is in lower branch, current gathered data is bigger than last time collection, when subsequent continuous several times increase,
Judge that character wheel turns over N pole field maximum MINN, i.e. valley in oscillogram, then current character wheel is 0；
Step 3：One circle dipolar magnetic field maximum MAXS, MINN was rotated by last time, its difference QM is magnetic field range ability,
Reference interval of this scope as this circle of rotation one, for determining other numerals；When in upper half-turn：Collection value be in
Corresponding numeral 1,2,3,4 during lower section,
[MINN+30%QM, MINN+46%QM, MINN+54%QM, MINN+70%QM, MINN+QM]
When being similarly in lower branch：Collection value is in corresponding numeral 6,7,8,9 during following section,
[MAXS-30%QM, MAXS-46%QM, MAXS-54%QM, MAXS-70%QM, MAXS-QM]
By difference relatively more than 8 numerals, these numerals due to being to table look-up to draw, can be asynchronous with character wheel,
Tiny flow quantity identification can be used as to calculate to use, and the identification of 0,5 numeral can be used as real time measure data.
Claims (5)
1. the flowmeter high-resolution based on linear magnetic sensor counts conversion equipment, it is characterised in that including counting frame, counts
Device, drive gear and linear magnetic sensor, counter and drive gear are arranged on counting frame, driving gear drives counter
Great wheel, be provided with two opposite polarity magnet steel in great wheel, the center of circle of two magnet steel and great wheel is located along the same line, great wheel
One collecting circuit board is set on the tangent line of lower section, and collecting circuit board is arranged on counting frame, and linear magnetic sensor is arranged on collection
On circuit board, linear magnetic sensor is engaged with two magnet steel.
2. the flowmeter high-resolution according to claim 1 based on linear magnetic sensor counts conversion equipment, its feature
It is that the linear magnetic sensor connection sets an AD conversion unit, AD conversion unit is arranged on display control circuit plate.
3. the flowmeter high-resolution according to claim 1 based on linear magnetic sensor counts conversion equipment, its feature
It is that described two magnet steel are separately positioned on the digit position of great wheel.
4. the flowmeter high-resolution according to claim 1 based on linear magnetic sensor counts conversion equipment, its feature
It is that described two magnet steel are separately positioned on 2 and 7 two digit positions of great wheel.
5. the flowmeter high-resolution according to claim 1 based on linear magnetic sensor counts conversion equipment, its feature
It is that described two magnet steel are separately positioned on 3 and 8 two digit positions of great wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721091222.4U CN207180796U (en) | 2017-08-29 | 2017-08-29 | Flowmeter high-resolution based on linear magnetic sensor counts conversion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721091222.4U CN207180796U (en) | 2017-08-29 | 2017-08-29 | Flowmeter high-resolution based on linear magnetic sensor counts conversion equipment |
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| Publication Number | Publication Date |
|---|---|
| CN207180796U true CN207180796U (en) | 2018-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721091222.4U Expired - Fee Related CN207180796U (en) | 2017-08-29 | 2017-08-29 | Flowmeter high-resolution based on linear magnetic sensor counts conversion equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340024A (en) * | 2017-08-29 | 2017-11-10 | 杭州先锋电子技术股份有限公司 | Flowmeter high-resolution based on linear magnetic sensor counts conversion equipment |
-
2017
- 2017-08-29 CN CN201721091222.4U patent/CN207180796U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340024A (en) * | 2017-08-29 | 2017-11-10 | 杭州先锋电子技术股份有限公司 | Flowmeter high-resolution based on linear magnetic sensor counts conversion equipment |
| CN107340024B (en) * | 2017-08-29 | 2023-04-11 | 杭州先锋电子技术股份有限公司 | High-resolution counting conversion device of flow meter based on linear magnetic sensor |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180403 |
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| CF01 | Termination of patent right due to non-payment of annual fee |