CN100451562C - Non-magnet senser measurer and its measuring method - Google Patents
Non-magnet senser measurer and its measuring method Download PDFInfo
- Publication number
- CN100451562C CN100451562C CNB2004100088023A CN200410008802A CN100451562C CN 100451562 C CN100451562 C CN 100451562C CN B2004100088023 A CNB2004100088023 A CN B2004100088023A CN 200410008802 A CN200410008802 A CN 200410008802A CN 100451562 C CN100451562 C CN 100451562C
- Authority
- CN
- China
- Prior art keywords
- scan
- module
- impeller
- rotation
- state
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000013016 damping Methods 0.000 claims abstract description 22
- 238000005259 measurement Methods 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 239000010949 copper Substances 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 4
- 239000011800 void material Substances 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 14
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 4
- 230000010354 integration Effects 0.000 abstract 1
- 150000002739 metals Chemical class 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 22
- 238000013461 design Methods 0.000 description 5
- 238000010998 test method Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000002512 anti-withdrawal effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000010148 water-pollination Effects 0.000 description 1
Images
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The present invention relates to a device and a method for realizing flow measurement by an SCAN IF module of an MSP430FW42X single-chip microcomputer. Inductors in two resonance circuits are arranged at the upper side of an impeller to detect the rotation of the impeller. One half of the impeller is spread with copper or other metals with damping property. An electric signal measured by the resonance circuits are completed by the SCANIF module built in the MSP430FW42X single-chip microcomputer, and the SCAN IF module calculates the rotation (fluid flow) and the direction of the electric signal. The present invention has the advantages that because the MSP430FW42X single-chip computer is a special MCU chip which developed currently by TI is dedicated for detecting electronic flow and rotation movement, the MSP430FW42X single-chip computer perfectly combines an ultra-low power consumption MCU, a rotary scan interface and a liquid crystal display LCD driving module into integration, and the ultra-low power consumption structure of the device and a flow detection module not only extends the service life of batteries, but also enhances the precision and the performance of instruments simultaneously; the of resonance circuits used as a sensor of the rotary scan interface for measuring signals can exactly realize measurement of flow and rotation by measuring different damping coefficients of the resonance circuits.
Description
Technical field:
The present invention relates to a kind of device and method, genus fluid measurement instrument and method manufacturing field of realizing flow measurement with the SCAN IF module of MSP430FW42X.
Background technology:
Granted publication CN2570741Y, title " a kind of no magnetic sensing intelligence water meter ", this water meter comprises watchcase, valve seat, movement, electrically operated valve, fluidic generator, non-magnetic sensor, adopt the signal pickup assembly of no magnetic sensing, reduce the initiating flow of water meter, make metering more rationally accurately.
Granted publication CN2572371Y, title " hydrophily heat/cold meter ", this sensor detector comprise two telefaults and; Horizontal fixed has sheet metal on the rotor of described rotor water gauge; The turning axle of the described rotor of described inductive coil symmetry is arranged on the described upper cover plate, the rotor rotation, and sheet metal causes relative inductance value to change with the relative position variation of two telefaults.
Summary of the invention:
Purpose of design: adopt resonant tank (LC sensor) to combine, realize accurate measurement to various fluid flows with the SCAN IF module of MSP430FW42X.
Design proposal: the MSP430FW42x series monolithic is that TI is at the special-purpose MCU chip of electronic type flow with the up-to-date exploitation of detection that rotatablely moves, it ideally is combined as a whole super low-power consumption MCU, rotation sweep interface (Scan IF) and liquid crystal display LCD driver module, the super low-power consumption structure of this device and flow detection module have not only prolonged the life-span of battery, have also improved the precision and the performance of instrument simultaneously.SCAN IF module can be in the motion of automatic inspection line under the low-power consumption or rotation.SCAN IF module is formed by three: AFE (analog front end) (AFE), signal Processing state machine (PSM), definition status machine (TSM).Wherein the main components and parts of AFE (analog front end) are " VCC/2 " generators, a comparer and 10 DAC, AFE (analog front end) stimulus sensor, detection signal and be conversion of signals digital form; These digital signal entering signal treatment state machines, the signal Processing state machine rotatablely moves according to these signal analysis and counting, and the signal Processing state machine calculates rotation (fluid flow) and its direction; Definition status machine control AFE (analog front end) and signal Processing state machine.1. ultimate principle: a mechanical hook-up that is made of impeller or cross helical gear flows fluid and is converted to rotation, and this conversion can realize the measurement of fluid flow.Place the inductance in the resonant tank top of impeller can detect the rotation of impeller, half of impeller is covered with copper or other have the metal of damping and amortization.By the determining positions of inductance above impeller the ratio of damping of resonant tank, when inductance is positioned at regional a, when the ratio of damping in loop is higher than inductance and is positioned at regional b.By measuring the different damping coefficient of resonant tank, can realize measurement to rotating.Fig. 1 is the measuring principle synoptic diagram.2. vibration test method: Fig. 2 has provided the waveform when 2 sensors are positioned at zones of different, and MSP430FW42X adopts the vibration test method that different attenuation amplitudes is converted to digital signal and measures.This method is expressed as " L " to the damping factor of the sensor among Fig. 21, and the damping factor of sensor 2 is expressed as " H ".3. signal Processing: along with wheel rotation, the signal of sensor 1 and sensor 2 constantly changes thereupon.Fig. 3 has provided the state variation of two sensors, if know preceding state and new state, can draw the direction of rotation simultaneously.Increase counting: change to state " a " by state " d "; Subtract counting: change to state " a " by state " b ".
Technical scheme 1: non-magnetic sensor measurement mechanism, inductance in two resonant tanks places the top of impeller to detect the rotation of impeller, half of impeller is covered with copper or other have the metal of damping and amortization, and the measured electric signal of resonant tank inputs to the signal input part of built-in SCAN IF in the MSP430FW42X single-chip microcomputer and calculates rotation (fluid flow) and its direction by SCAN IF module.
Technical scheme 2: a kind of non-magnetic sensor measuring method that is applicable to the described device of claim 1, since the determining positions of inductance above impeller the ratio of damping of resonant tank, when inductance is positioned at regional a, when the ratio of damping in loop is higher than inductance and is positioned at regional b, by measuring the different damping coefficient of resonant tank, MSP430FW42X adopts the vibration test method that different attenuation amplitudes is converted to digital signal and measures, to realize the measurement to rotating.
The present invention compares with background technology, the one, because the MSP430FW42x series monolithic is that TI is at the special-purpose MCU chip of electronic type flow with the up-to-date exploitation of detection that rotatablely moves, it ideally is combined as a whole super low-power consumption MCU, rotation sweep interface (Scan IF) and liquid crystal display LCD driver module, the super low-power consumption structure of this device and flow detection module have not only prolonged the life-span of battery, have also improved the precision and the performance of instrument simultaneously; The 2nd, adopt the measuring-signal sensor of resonant tank as the rotation sweep interface, by measuring the different damping coefficient of resonant tank, can realize to high precision measurement to rotation flow; The 3rd, the fluid measurement utensil that adopts MSP430FW42X to design, its circuit structure are very simple, reliable; The 4th, do not need external flow to detect IC, directly replace TMS3723B, simplify The Hardware Design and software design greatly, and improved the stability of system; The 5th, be not only applicable to heat meter, hot water and cold water instrument, gas instrument and industrial flowmeter, windage scale and other rotations and detect application, and the application of timer support counter, the operation of radio frequency bit stream, IrDA and M-Bus communication, and can realize that analog-to-digital general-purpose simulation comparer A can be used in the calorimeter.
Description of drawings:
Fig. 1 is 2 structural representations that the LC sensor measurement rotatablely moves in the non-magnetic sensor measurement mechanism.
Fig. 2 is the waveform synoptic diagram of 2 LC sensors when being positioned at zones of different.
Fig. 3 is the state variation synoptic diagram of 2 LC sensors.
Fig. 4 adopts MSP430FW42X design water meter block scheme.
Fig. 5 is a SCAN IF module frame chart.
Embodiment:
Embodiment 1: the non-magnetic sensor measurement mechanism, (resonant tank is the LC resonant tank to two resonant tanks, LC resonance measurement sensor just) inductance in places the top of impeller to detect the rotation of impeller, and half of impeller is covered with copper or other have the metal of damping and amortization, sees accompanying drawing 1.The measured electric signal of resonant tank is finished by built-in SCAN IF module in MSP430FW42X (MSP430FW423, MSP430FW425, the MSP430FW427) single-chip microcomputer, calculates rotation (fluid flow) and its direction by the SCANIF module, sees accompanying drawing 5.One end of two resonant tanks, one end and capacitor C also connects the SIFCOM end of SCAN IF module, the other end ground connection of capacitor C, and the other end of two resonant tanks connects the SIFCH0 and the SIHF1 end of SCAN IF module respectively, sees accompanying drawing 1.SCAN IF module is made up of AFE (analog front end) (AFE), signal Processing state machine (PSM), definition status machine (TSM), AFE (analog front end) stimulus sensor wherein, detection signal and be conversion of signals digital form, these digital signal entering signal treatment state machines, the signal Processing state machine rotatablely moves according to these signal analysis and counting, definition status machine control AFE (analog front end) and signal Processing state machine are seen accompanying drawing 1.1. the basic setup of CAN IF: control register SIFCTL1, SIFCTL2, SIFCTL3, SIFCTL4, SIFCTL5 that SCAN IF is set; Definition P6.x/SIFCH.x pin is a SCAN IF functions of modules; Open " VCC/2 " generator; Clock source selection; The signal condition processor; 2. plan the time state machine: the time state machine of SCAN IF is used for determining the measurement sequence, and each required time in step can be adjusted accurately, and common measurement sequence is as follows: determine idle condition; Excitation LC sensor; The time-delay regular hour, measure this moment and can carry out; Open DAC and comparer; Measure; Stop; 3. define the magnetic hysteresis thresholding of DAC: DAC and provide the magnetic hysteresis thresholding for the damping and the self-sustained oscillation device of each sensor, oscillating curve by observing each sensor and the voltage of DAC are adjusted the magnetic hysteresis thresholding of DAC; 4. signal Processing state machine: it is a programmable state machine that the signal Processing state machine is handled, and it draws rotating speed and direction by the state table that is stored in the MSP430 storer, the state table of vectorial SIFTPSMV initial directional PSM.
Embodiment 2: the non-magnetic sensor measuring method, as mentioned above, since the determining positions of inductance above impeller the ratio of damping of resonant tank, when inductance is positioned at regional a, when the ratio of damping in loop is higher than inductance and is positioned at regional b, by measuring the different damping coefficient of resonant tank, MSP430FW42X adopts the vibration test method that different attenuation amplitudes is converted to digital signal and measures, to realize the measurement to rotating.Along with wheel rotation, the signal in two resonant tanks constantly changes thereupon, knows preceding state and new state, promptly draws the direction of rotation, increases counting: change to state " a " by state " d "; Subtract counting: change to state " a " by state " b ", see accompanying drawing 2 and 3.
SCANIF module initialization program:
void?InitScanIF(void){int?i；P6SEL|＝0x03；
// initialization time state machine
SIFTSM0＝0x0000；SIFTSM1＝0x002C；SIFTSM2＝0x0404；SIFTSM3＝0x0934；
SIFTSM4＝0x3174；SIFTSM5＝0x0220；
The magnetic hysteresis thresholding of // given DAC
SIFDACR0＝0x0330；SIFDACR1＝0x0330；
The control register of // initialization Scan IF
SIFCTL2＝0x0140；for(i＝0；i＜＝857；i++)；SIFCTL3＝0x0100；SIFCTL4＝0x13F0；
SIFCTL5＝0x0045；SIFTPSMV＝(unsigned?int)&PSM；SIFCTL1|＝0x1001；
Embodiment 3: no magnetic water meter, it comprises power supply, liquid crystal display LCD and motor driven by-pass valve control, and the motor driven by-pass valve control is controlled by the CMU processing unit, is used for the unlatching of by-pass valve control or closes, when in the card (or CMU processing unit record) when rich, valve is opening; When in the card (or CMU processing unit record) during no money, valve is closed condition.Rotation sweep interface (ScanIF) among the MSP430FW42X (MSP430FW423, MSP430FW425, MSP430FW427) connects signal output part, communication interface IC-card or radio-frequency card or the M-BUS teletransmission of two LC resonant tanks respectively.Be connected to electric capacity between two LC resonant tank signal output parts and rotation sweep interface.Be provided with antiwithdrawal device and motor driven in the no magnetic water meter.Measuring principle: being converted to rotatablely moves realizes the detection of fluid flow to this programme by fluid is flowed.Adopt with the impeller of metal film and realize this conversion, ducted fluid promotes the continuous rotation of impeller, and its rotating speed directly is decided by flow rate of fluid.This mechanical rotation signal is translated into the SCAN IF module that electric signal is delivered to microcontroller through no magnetic non-contacting sensor, and SCAN IF module calculates rotation (fluid flow) and its direction.Major function: 1. water consumption metering: total water amount, when the water consumption per month metering; Store 12 months historical water usage; 2. time management: have calendar, timing and leap year automatic switching function; Calendar, time are provided with the measure that prevents unauthorized people's operation; 3. logout: a, water yield record: purchased the time of water last time and purchased the water yield, total water amount, surplus water, last 12 months historical water usage; B, battery management: under-voltage record of battery and prompting; C, artificial destruction record; Tear table record open; 4. show: the integrated flow of display water-meter, surplus water, this purchases relevant informations such as the water yield and water meter valve state, battery status; DISPLAY ORDER and display time intervals can preset; Report to the police and the error message prompting; 5. communication interface: can choose any one kind of them in three kinds of modes below.IC-card, radio-frequency card, M_BUS teletransmission; 6. button operation:, display button can be set according to user's base table and watchcase decision.
What need understand is: though the foregoing description is to the present invention's detailed explanation of contrasting.But these explanations only limit to explanation of the present invention, rather than limitation of the present invention, and any innovation and creation that do not exceed in the connotation of the present invention all fall within the scope of protection of the present invention.
Claims (5)
1, a kind of non-magnetic sensor measurement mechanism, it is characterized in that: the inductance in two resonant tanks places the top of impeller to detect the rotation of impeller, half of impeller is covered with copper or other have the metal of damping and amortization, one end of two resonant tanks, one end and capacitor C also connects the SIFCOM end of built-in SCAN IF module in the MSP430FW42X single-chip microcomputer, the other end ground connection of capacitor C, the other end of two resonant tanks connect the SIFCH0 of built-in SCAN IF module in the MSP430FW42X single-chip microcomputer and SIHF1 end respectively and calculate amount of spin and rotation direction by SCAN IF module.
2, non-magnetic sensor measurement mechanism according to claim 1, it is characterized in that: SCAN IF module is made up of AFE (analog front end) (AFE), signal Processing state machine (PSM), definition status machine (TSM), AFE (analog front end) stimulus sensor wherein, detection signal and be conversion of signals digital form, these digital signal entering signal treatment state machines, the signal Processing state machine rotatablely moves according to these signal analysis and counting, definition status machine control AFE (analog front end) and signal Processing state machine.
3, a kind of non-magnetic sensor measuring method that is applicable to the described device of claim 1, it is characterized in that: since the determining positions of inductance above impeller the ratio of damping of resonant tank, when inductance is positioned at regional a, when the ratio of damping in loop is higher than inductance and is positioned at regional b, by measuring the different damping coefficient of resonant tank, resonant tank is regularly encouraged by SCAN IF module, produce waveform, built-in SCAN IF module is measured the situation of change of each waveform in the MSP430FW42X single-chip microcomputer, different attenuation amplitudes is converted to digital signal measures, draw the amount of spin and the rotation direction of impeller.
4, non-magnetic sensor measuring method according to claim 3, it is characterized in that: along with wheel rotation, the signal in two resonant tanks constantly changes thereupon, knows preceding state and new state, promptly draw the direction of rotation, increase counting: change to state " a " by state " d "; Subtract counting: change to state " a " by state " b ".
5, non-magnetic sensor measuring method according to claim 3 is characterized in that: SCAN IF module initialization program:
void?InitScanIF(void)
{int?i；
P6SEL|＝0x03；
// initialization time state machine
SIFTSM0＝0x0000；
SIFTSM1＝0x002C；
SIFTSM2＝0x0404；
SIFTSM3＝0x0934；
SIFTSM4＝0x3174；
SIFTSM5＝0x0220；
The magnetic hysteresis thresholding of // given DAC
SIFDACR0＝0x0330；
SIFDACR1＝0x0330；
The control register of // initialization Scan IF
SIFCTL2＝0x0140；
for(i＝0；i＜＝857；i++)；
SIFCTL3＝0x0100；
SIFCTL4＝0x13F0；
SIFCTL5＝0x0045；
SIFTPSMV＝(unsigned?int)&PSM；
SIFCTL1|＝0x1001。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100088023A CN100451562C (en) | 2004-03-12 | 2004-03-12 | Non-magnet senser measurer and its measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100088023A CN100451562C (en) | 2004-03-12 | 2004-03-12 | Non-magnet senser measurer and its measuring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1563908A CN1563908A (en) | 2005-01-12 |
| CN100451562C true CN100451562C (en) | 2009-01-14 |
Family
ID=34477734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100088023A Expired - Lifetime CN100451562C (en) | 2004-03-12 | 2004-03-12 | Non-magnet senser measurer and its measuring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100451562C (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102200459A (en) * | 2010-03-26 | 2011-09-28 | 河南新天科技股份有限公司 | Direct reading gauge |
| CN103575340B (en) * | 2013-08-22 | 2016-04-06 | 浙江利尔达物联网技术有限公司 | Liquid flow non-magnetic detector and detection method thereof |
| CN104048723B (en) * | 2014-06-30 | 2017-06-27 | 江苏赛达电子科技有限公司 | Big pointer up-sampling separates magnetism-free type remote transmitting water meter |
| CN104089670A (en) * | 2014-07-21 | 2014-10-08 | 江苏赛达电子科技有限公司 | Digital display anti-magnetic-disturbance water meter |
| CN104089671A (en) * | 2014-07-21 | 2014-10-08 | 江苏赛达电子科技有限公司 | Magnetic disturbance prevention water meter controlled in wireless and remote mode |
| CN108645463A (en) * | 2017-10-12 | 2018-10-12 | 三川智慧科技股份有限公司 | A kind of Novel measuring damping fin based on no magnetic NB-IoT Internet of Things water meters |
| CN107782421B (en) * | 2017-10-12 | 2020-02-11 | 三川智慧科技股份有限公司 | Calibration method for water meter metering threshold value based on nonmagnetic NB-IoT (NB-IoT) internet of things |
| CN107817034B (en) * | 2017-10-27 | 2020-02-07 | 深圳友讯达科技股份有限公司 | Method and device for correcting temperature of meter |
| CN107747984B (en) * | 2017-10-27 | 2019-11-19 | 深圳友讯达科技股份有限公司 | Reference voltage modification method and device |
| CN108871469A (en) * | 2018-04-16 | 2018-11-23 | 深圳市源啓智能科技有限公司 | A kind of flowmeter of non-magnetic sensor |
| CN108981772B (en) * | 2018-06-12 | 2020-09-18 | 杭州绿鲸科技有限公司 | Non-contact non-magnetic anti-disassembly detection method for meter |
| CN109238313B (en) * | 2018-09-18 | 2020-12-01 | 东南大学 | A Multi-parameter LC Sensor for Condition Monitoring of Rotating Structures |
| CN110274636B (en) * | 2018-11-05 | 2020-11-27 | 杭州绿鲸科技有限公司 | Non-magnetic water meter flow detection device and method |
| CN112113637A (en) * | 2019-06-22 | 2020-12-22 | 无锡水表有限责任公司 | Method for rapidly discriminating performance stability of water meter |
| CN111289046A (en) * | 2020-02-29 | 2020-06-16 | 成都易信达科技股份有限公司 | Non-magnetic water meter and using method thereof |
| CN111579006A (en) * | 2020-04-16 | 2020-08-25 | 上海飞奥燃气设备有限公司 | A non-magnetic sensor metering detection intelligent gas meter |
| CN114623893A (en) * | 2020-12-10 | 2022-06-14 | 金卡智能集团股份有限公司 | Detection device and measuring instrument |
| CN114623885A (en) * | 2020-12-11 | 2022-06-14 | 国民技术股份有限公司 | A non-magnetic metering system and its metering method |
| CN113899298A (en) * | 2021-10-15 | 2022-01-07 | 济南瑞泉电子有限公司 | Inductance position sensing device based on phase shift sine and cosine double-circuit voltage detection |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2570741Y (en) * | 2002-07-15 | 2003-09-03 | 姜跃炜 | Non-magnetic sensing intelligent water purification gauge |
| CN2572371Y (en) * | 2002-10-17 | 2003-09-10 | 金陶 | Water medium heat/cold meter |
-
2004
- 2004-03-12 CN CNB2004100088023A patent/CN100451562C/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2570741Y (en) * | 2002-07-15 | 2003-09-03 | 姜跃炜 | Non-magnetic sensing intelligent water purification gauge |
| CN2572371Y (en) * | 2002-10-17 | 2003-09-10 | 金陶 | Water medium heat/cold meter |
Non-Patent Citations (4)
| Title |
|---|
| Electrical Magazine,Vol.5 No.5. 2001 * |
| 智能型低功耗热量表研究. 陈伟.Mechanical & Electrical Magazine,Vol.5 No.5. 2001 |
| 智能型低功耗热量表研究. 陈伟.Mechanical & Electrical Magazine,Vol.5 No.5. 2001 * |
| 智能型低功耗热量表研究. 陈伟.Mechanical & * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1563908A (en) | 2005-01-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100451562C (en) | Non-magnet senser measurer and its measuring method | |
| US8051723B2 (en) | Encoder-type register for an automatic water meter reader | |
| US20160084632A1 (en) | Tamper detection through magnetic sensing | |
| CN203489925U (en) | Passive intelligent water meter | |
| CN202814466U (en) | Electronic water meter | |
| CN102944268B (en) | A kind of intelligent gas meter with temperature compensation | |
| RU156181U1 (en) | METHOD FOR MEASURING LIQUID FLOWS PROTECTED FROM UNAUTHORIZED ACCESS | |
| CN109115293A (en) | A kind of electronic counting-type water meter | |
| CN2752732Y (en) | Non-magnetic sensor measuring device | |
| CN201548263U (en) | Gas meter with double-display mode | |
| CN109186698A (en) | A kind of electromagnetism water meter transmitter of interval excitation and Digital Signal Processing | |
| CN106441479A (en) | Counting device for automatically controlling sampling detection of two magnetic sensors with low power consumption | |
| CN104990597A (en) | Magnetic pulse electronic water meter | |
| CN201233259Y (en) | Electronic flowmeter | |
| RU2699260C1 (en) | Electronic tachometric meter for accounting of liquid and gas flow with remote transmission of measurement results via radio channel | |
| CN104596605B (en) | A kind of magnetic automation flow recorder | |
| JPS601377Y2 (en) | fluid flow meter | |
| CN107727163A (en) | A kind of control method and control system for steam type vortex precession flowmeter | |
| WO2002001164A1 (en) | Flow meter for liquids | |
| CN2549438Y (en) | Digital open channel flowmeter | |
| CN111579006A (en) | A non-magnetic sensor metering detection intelligent gas meter | |
| CN220893535U (en) | Electronic water meter capable of being rapidly calibrated | |
| CN105651347A (en) | Intelligent electromagnetic flowmeter system | |
| CN204788510U (en) | Magnetic pulse formula electron water gauge | |
| CN203012855U (en) | Intelligent gas meter with temperature compensation function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: LIERDA SCIENCE AND TECHNOLOGY CO., LTD. Free format text: FORMER NAME: HANGZHOU LIERDA TECHNOLOGY CO., LTD. Owner name: LIERDA TECHNOLOGY GROUP CO., LTD. Free format text: FORMER NAME: LIERDA SCIENCE AND TECHNOLOGY CO., LTD. Owner name: HANGZHOU LIERDA TECHNOLOGY CO., LTD. Free format text: FORMER NAME: LIERDA MONOLITHIN PROCESSOR TECH CO., LTD., HANGZHOU |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 301 room 207, tower building, No. 310000, Wen two road, Xihu District, Zhejiang, Hangzhou Patentee after: Lierda Technology Co.,Ltd. Address before: 301 room 207, tower building, No. 310000, Wen two road, Xihu District, Zhejiang, Hangzhou Patentee before: Hangzhou Lierda Technology Co.,Ltd. Address after: 301 room 207, tower building, No. 310000, Wen two road, Xihu District, Zhejiang, Hangzhou Patentee after: Hangzhou Lierda Technology Co.,Ltd. Address before: 301 room 207, tower building, No. 310000, Wen two road, Xihu District, Zhejiang, Hangzhou Patentee before: HANGZHOU LIERDA SINGLE CHIP MI |
|
| CP03 | Change of name, title or address |
Address after: 310011 Gongshu District, Hangzhou Province, the United States and the United States hospital A District, building 1201, room 18, room Patentee after: LIERDA SCIENCE & TECHNOLOGY GROUP Co.,Ltd. Address before: 301 room 207, tower building, No. 310000, Wen two road, Xihu District, Zhejiang, Hangzhou Patentee before: Lierda Technology Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20090114 |
|
| CX01 | Expiry of patent term |