CN202915962U - Water meter data collector - Google Patents
Water meter data collector Download PDFInfo
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- CN202915962U CN202915962U CN 201220612638 CN201220612638U CN202915962U CN 202915962 U CN202915962 U CN 202915962U CN 201220612638 CN201220612638 CN 201220612638 CN 201220612638 U CN201220612638 U CN 201220612638U CN 202915962 U CN202915962 U CN 202915962U
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Abstract
The utility model provides a water meter data collector. The water meter data collector is characterized by comprising a flow sense unit, a pressure measure unit, a valve control unit, a switch input unit, a micro controller unit, a communication unit and a power supply unit; wherein the flow sense unit, the pressure measure unit, the valve control unit, the switch input unit, the communication unit, and the power supply unit are respectively connected with the micro controller unit and are encapsulated in a shell, and the shell is arranged on a copper opening of the water meter. A data collecting controller provided by the water meter data collector has the advantages of preventing the data meter flow from losing the data on condition that the system powers down or a cable breaks line.
Description
Technical field
The utility model relates to a kind of electronic technology field, particularly a kind of data of water meter collector.
Background technology
Water meter is the instrument of measuring discharge.The integrated flow that mostly is water is measured.Generally be divided into volumetric water meter and velocity type water meter two classes.The former accuracy is high than the latter, but high to water quality requirement, and is easily blocked when impure in the water.The instrument of record tap water water consumption is contained on the water pipe, and when the user discharged water, the water yield passed through was pointed out in the rotation of pointer or character wheel on the table.
Unique measurement instrument that water meter is settled accounts as water undertaking and user, in water system, play extremely important status, especially the management of large-diameter water meter (referred to as large table), very important especially, so-called large-diameter water meter refers to the water meter that nominal bore 50mm is above.Existing intellective IC card large-diameter water meter is a kind of new water meter that utilizes modern microelectric technique, Modern Transducer Technology, intellective IC card technology water consumption to be measured and carried out the transmission of water data and settlement bargain.This generally only has flow collection with conventional water meter compares with the function of mechanical indicator demonstration water consumption, is a very large progress.Generally be applied to the metering of the total water amounts such as community, village, enterprise.
The metering section of tradition IC-card water meter is to adopt pulse single-transmitting watermeter and cable transmission flow pulse, when generation systems power down or cable break situation, flow will be lost, and the flow of losing can't be recovered, affect the statistics of data, and then be with inconvenience to later stage work.
How a kind of data of water meter collector is provided, can overcomes above-mentioned technical matters, become the technical matters that needs to be resolved hurrily.
The utility model content
The technical problems to be solved in the utility model is how a kind of data of water meter collector is provided, and can in the situation of system power failure or cable break, guarantee the normal of data of water meter.
For solving the problems of the technologies described above, the utility model provides a kind of data of water meter collector, comprising: flow sensing unit, pressure measurement cell, valve control unit, switch input block, micro controller unit, communication unit and power supply unit; Wherein, described flow sensing unit, pressure measurement cell, valve control unit, switch input block, communication unit, power supply unit are connected with described micro controller unit respectively, and are packaged in the housing, and described housing is installed on the copper mouth of described water meter.
Preferably, described communication unit is the RS485 communication interface.
Preferably, described flow sensing unit comprises: sensor and testing circuit; Described sensor is perpendicular to the top that is installed in the dial plate needle, and is connected with described testing circuit; Described testing circuit receives the pulse signal that described sensor sends.
Preferably, described sensor is Hall element.
Preferably, described pressure measurement cell comprises: I/V transfer resistance, operational amplifier and A/D converter; Described I/V transfer resistance sends to described operational amplifier with voltage signal; Described operational amplifier sends to voltage signal described A/D converter again.
Preferably, described valve control unit comprises: prevented moment of torsion circuit, relay drive circuit and relay; Describedly prevented that the moment of torsion circuit was connected with described relay drive circuit; Described relay drive circuit is controlled opening or closing of described valve.
Preferably, described communication unit is the RS485 communication interface.
Compared with prior art, characteristics of the present utility model are: because the housing of encapsulation collector is directly installed on the copper mouth of water meter, so that inner Magnetic Sensor can noncontact be sensed the rotation of water meter needle, thereby detect flow pulse.Even also can normally measure under power-down conditions, it is more convenient to install, and does not need to change original base table structure.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment and technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment and the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structured flowchart of a kind of data of water meter collector of the utility model;
Fig. 2 is the structured flowchart of flow sensing unit in a kind of data of water meter collector of the utility model;
Fig. 3 is the structured flowchart of the valve control unit in a kind of data of water meter collector of the utility model.
Embodiment
The below will engage the accompanying drawing among the utility model embodiment, and the technical scheme among the utility model embodiment is clearly and completely described, and obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to shown in Figure 1ly, Fig. 1 is the structured flowchart of a kind of data of water meter collector of the utility model.
The utility model provides a kind of data of water meter collector, comprising: flow sensing unit, pressure measurement cell, valve control unit, switch input block, micro controller unit, communication unit and power supply unit; Wherein, described flow sensing unit, pressure measurement cell, valve control unit, switch input block, communication unit, power supply unit are connected with described micro controller unit respectively, and be packaged in the housing, described housing is installed on the copper mouth of described water meter, and jointly consists of the heavy caliber electronic remote transmission water meter with base table.
The data of water meter collector that the utility model provides is used for converting the mechanical finger indicating value of water meter to electric impulse signal, obtain integrated flux after accumulated counts, and communication unit transmits data on flows at a distance.Described data acquisition unit has control concurrently and drives the function of electrically operated valve, and it is to receive instruction by communication unit to come by-pass valve control to open or close operation.
Please refer to shown in Figure 2ly, Fig. 2 is the structured flowchart of flow sensing unit in a kind of data of water meter collector of the utility model.
Flow detection in the data of water meter collector that the utility model provides, the flow sensing unit comprises Hall element and testing circuit.
Hall element is perpendicular to the top that is installed in the dial plate needle, with S or the N utmost point formation magnetic induction return circuit of needle.The dial plate needle is along with the counting gear rotation produces alternately changing magnetic field, and action of alternating magnetic field induces a series of positive and negative spike pulses in Hall element.Become the rect.p. of one fixed width after the pulse process testing circuit comparison of Hall element output, the shaping, then export respectively the count pulse of following current body or adverse current body both direction by the sensing circuit.
Detect the rotating speed of water meter counting gear by Hall element, thereby obtain the pulse signal that is directly proportional with water consumption, then pass through the inner RAM counter pulse signals Continuous accumulation of micro controller unit (MCU), from obtaining total volumetric flow rate.
Water consumption is kept in the FLASH storer of MCU inside, and data are preserved the following situation that is divided into:
Preserve during the certain water consumption of every accumulative total (such as 1 cube);
Preserve first rear transmission during each communication;
Preserve immediately during battery undervoltage;
Preserve during the abnormal situation (opening or closing fault such as valve).
Flux cumulating is to carry out in RAM, only on occur during any situation, the flow value among the RAM should be copied in the FRAM storer preservation or directly write FRAM.
For measuring channel pressure, designed a kind of pressure measurement cell, it is comprised of I/V transfer resistance, operational amplifier and A/D converter.The current sampling resistor of I/V conversion adopts the precision resistance of 12.5 Ω, when input current is respectively 4mA and 20mA, obtain 0.5V and 2.5V voltage signal at the sample resistance two ends, this voltage signal is directly by 10 A/D passage P2.0 that output to MCU after the operational amplifier buffering, after A/D conversion, obtain 204～1023 digital signals, its pressure measurement accuracy can reach full scale ± 2%.Namely, the utility model data of water meter collector provides the electric current input channel of one tunnel 4～20mA, the pressure signal that is used for measuring converts 0.5～2.5V voltage signal to, obtains 10 binary value after 10 A/D conversions, and then converts 0～1.00Mpa force value to.
As shown in Figure 3, Fig. 3 is the structured flowchart of the valve control unit in a kind of data of water meter collector of the utility model.
Valve control unit in the utility model data of water meter collector comprises: prevented moment of torsion circuit, relay drive circuit and relay.
Prevented that button square circuit was for avoiding the valve rear generation motor rotation blockage motor damage that puts in place.Prevented that button square circuit was to be made of two AND circuit, each and two input ends of door cut-in valve control signal and valve signal that puts in place respectively, by with logic after delivery valve control signal.When valve puts signal in place when being high level, valve control signal controlling is effective, and when signal was low level and valve puts in place, valve control signal controlling was invalid.Like this, valve open or valve pass process in, as long as valve leaves or valve closes and to put in place, block immediately valve control signal, motor is shut down.
The data of water meter collector that the utility model provides provides valve to open or valve closes control output, is used for the control electric butterfly valve and opens or closes operation.The control of the common realization of signal to electrically operated valve that puts in place of these two control valve signal and DI1 and DI2 valve ON/OFF.Valve opens or closes respectively and is controlled by two relays, and when relay contact closure, plugged makes motor get electric operation forward or backwards, and rotation direction depends on electric power polarity.
The data of water meter collector that the utility model provides is opened with valve except valve and to be closed the input signal that puts in place, also comprises in addition double switch amount input channel, and namely " switch input block " is mainly used in receiving the alarm switch signal.This double switch input channel can receiving key contact or open collector signal, and input low level is effective.
Data of water meter flow controller of the present utility model provides the input of 4 channel switchs, and each passage can receive outside switch contact or open collector gate signal, is Low level effective.The input of 4 channel switchs can be used for following function:
OPS(DII): reaching a signal for detection of valve, during high level be+12V, is 0V during low level;
CLS(DI2): closing the signal that puts in place for detection of valve, is+12V to be 0V during low level during high level;
DI3, DI4: be used for the input of alarm switch signal, such as the infrared alarm switch.
Micro controller unit is the MSP430F1232 chip that adopts TI company, it is a kind of 16 single-chip microcomputers with super low-power consumption characteristic, the FLASH storer of built-in 4KB+256 byte, the RAM of 256 bytes, 1 general serial line interface, 1 timer, 1 comparer, 1 WTD timer, 21 input/output end ports and 10 A/D converters.MSP430F1232 has 28 pins, and its pin function is defined as follows shown in the table.
| Pin | Title | Defined function | Describe |
| 1 | TEST | The JATG control inputs | Be connected to programming socket JT1 |
| 2 | VCC | +3.0V | |
| 3 | P2.5/ROSC | For subsequent use | |
| 4 | VSS | 0V | |
| 5 | XOUT | 32.768KHz crystal output | |
| 6 | XIN | 32.768KHz crystal input |
| 7 | RST/NMI | The JATG control inputs | Be connected to programming socket JT1 |
| 8 | P2.0/ACLK/A0 | Pressure signal input (PRE_AIN) | |
| 9 | P2.1/INCLK | Primary power interrupting input (PFO) | Be connected to reset circuit PFO |
| 10 | P2.2/CAOUT/TAO | Interrupting input (BLO) is pressed in the battery embedding | |
| 11 | P3.0/STE0 | RS485 receives control | Be connected to RS485 driver RE through the I/ |
| 12 | P3.1/SIMO0 | RS485 sends control | Be connected to RS485 driver DE through the I/O interface |
| 13 | P3.2/SOMI0 | I/O interface closing control | Be connected to the EN end of I/O interface, Low level effective |
| 14 | P3.3/UCLK0 | For subsequent use | |
| 15 | P3.4/TXD0 | Data send (TXD) | Be connected to MAX3471 |
| 16 | P3.5/URXD0 | Data receiver (RXD) | Be connected to MAX3471 |
| 17 | P3.6 | Control output (ALA_OPEN) left by valve | Be connected to socket J3 |
| 18 | P3.7 | Valve closes control output (ALA_CLOSE) | Be connected to socket J3 |
| 19 | P2.3/CA0/TA1 | Valve reaches position input DI1(ALA_OP_STA) | Be connected to socket J3 |
| 20 | P2.4/CA1/TA2 | Valve closes the input DI2(ALA_CL_STA that puts in place) | Be connected to socket J3 |
| 21 | P1.0/TACLK | Switching value input (DI3) | Be connected to socket J2 |
| 22 | P1.1/TA0 | Switching value input (DI4) | Be connected to socket J2 |
| 23 | P1.2/TA1 | Count pulse input (SOA) positive pulse | Be connected to socket J4 |
| 24 | P1.3/TA2 | Count pulse input (SOB) negative pulse | Be connected to socket J4 |
| 25 | P1.4/SMCLK/TCK | The JATG control inputs | Be connected to programming socket JT1 |
| 26 | P1.5/TA0/TMS | The JATG control inputs | Be connected to programming socket JT1 |
| 27 | P1.6/TA1/TDI | The input of JATG data | Be connected to programming socket JT1 |
| 28 | P1.7/TA2/TDO/TDI | The output of JATG data | Be connected to programming socket JT1 |
Produce when following and interrupt when backup battery voltage is reduced to 3V, juxtaposition meter status byte corresponding positions is 1.It is to be input to the P2.2 mouth as the input level by divider resistance (intrinsic standoff ratio is 0.8) that battery undervoltage detects, with 1.5 * VCC of inside as the reference level, 1 capture compare device by inside is compared signal level with datum, represent undervoltage warning when cell voltage drops into 3V.
The data of water meter collector is the DC12/24V primary power power supply by the outside.Produce a rising edge and interrupt when primary power powers on, the P2.1 mouth is uprised by low, opens bus I/O by MCU; Produce a negative edge and interrupt when electric under the primary power, the P2.1 mouth closes closed bus I/O by high step-down by MCU, to save internal cell consumption.
The utility model can also comprise communication failure monitoring means (figure does not look), when communicating by letter between data acquisition controller and the CPU card controller, if when finding the garble except verification, namely can be used as the communication failure record one time, the corresponding positions of juxtaposition meter status byte=1.
When the primary power power down, MCU is except clock is in active state, and other all is in dormant state.Under dormant state, only have and can interrupt under the following situations waking up:
Flow pulse interrupts waking up: produce when the flow sensor input interface receives a pulse negative edge and interrupt, and MCU carries out the RAM counting.
Battery undervoltage wakes up: produce when battery undervoltage occurs and interrupt, and wake MCU up and carry out the battery undervoltage processing.
Primary power powers on and wakes up: produce when primary power powers on and interrupt, and wake MCU up and carry out the power supply electrifying processing.
In addition to the above, other interrupts Close All.
The P1.1 of MCU and P1.2 are the I/O interfaces with interrupt function, and be respectively applied to receive the two pulse signals from the output of flow sensing unit: the one tunnel is positive pulse, and another road is negative pulse.Be input as negative edge for P1.1 and trigger, P1.2 is input as falls along triggering.The P1.2 input pulse can be used as the reference signal of P1.1 input pulse, to determine the pulse signal validity of P1.1 input.
SOA of every reception and SOB pulse are carried out RAM and are added 1 operation.Concrete methods of realizing is:
(1) opens up 2 RAM counters in MCU inside, a SOA and a SOB counter.Wherein the counting step of SOA and SOB counter is 1 byte (00..FFH); Flow register byte length is 32 (in FRAM).
(2) P1.1 and P1.2 passage interrupt priority level are set, wherein the P1.1 interrupt priority level should be higher than P1.2.Namely at any time at first respond in the P1.1 passage and have no progeny, could respond the P1.2 passage and interrupt (interrupt priority level should be set).
(3) if the P1.1 passage produces to interrupt, carry out RAM by the SOA interrupt routine and add 1, then respond P1.2 and interrupt, carry out RAM by the SOB interrupt routine and add 1.
(4) value in two RAM counters reaches the counting setting, and for example two count values are 100(64H) time,
SOA and SOB value are compared, if SOA=SOB, the expression current count value is effective, otherwise makes mistakes for counting.
For the RWM304V1 plate originally, the SOA passage of P1.1 is used for counting, and the SOB passage of P1.2 is used for antimagnetic warning, jumps along triggering under all adopting.Owing to increased the FRAM storer at the RWM304V1 intralamellar part, so flowmeter counter and flow register should be set in FRAM.Concrete methods of realizing is:
(1) in FRAM, the flowmeter counter of 1 byte is set, be used for RAM and add 1 operation; Flow register A and the B of two 4 bytes are set, and A is the main flow register, and B is flow register for subsequent use, is respectively applied to preserve the flux cumulating result; The errors number counter of 2 bytes is set, is used for record aggregate-value errors number.
(2) open the P1.1 mouth and interrupt, allow the input flow rate pulse.
(3) 1 pulse of the every input of P1.1 mouth adds 1 operation in flowmeter counter, when count value reach setting 1,10 or 100 the time, should carry out flux unit and convert, this determines in the coefficient of flow that arranges, the system default coefficient of flow is 1.
(4) when the aggregate-value in the flowmeter counter reaches the coefficient settings value, aggregate-value is obtained actual flow after divided by the coefficient of flow value, unit is cubic meter.
(5) flow value after will converting is write flow of the people register A and B.When writing the flow register, should operate according to the following steps:
Read first the value in the A flow register, and with current conversion after the flow value addition, write back again A flow register;
Read again the value in the B flow register, and with current conversion after the flow value addition, write back again B flow register;
New value during A and B flow deposited compares, if the A=B value illustrates that numerical value is correct; If A, illustrates the aggregate-value mistake, but has allowed ± 1 digital error greater than the B value less than B or A;
If numerical fault should write 1 in water meter state byte corresponding positions, until write back again 0 when next time correct.Numerical fault should not affect accumulated result.
Errors number is write the indegree counter, in order to reading;
(6) when SOB passage (P1.2) when being input as low level, and the low level retention time surpasses 10S, confirms outside high-intensity magnetic field attack, and should be set to 1 this moment in " strong magnetic interference " position of water meter state byte, until the P1.2 mouth sets to 0 when reverting to high level, can not affect normal counting this moment.
(7) in the high-intensity magnetic field situation, if detect numerical fault, confirm then to have surreptitiously that the water phenomenon occurs, be set to 1 in " stealing water " position of water meter state byte, until the P1.2 mouth sets to 0 when reverting to high level.
The design objective of the data of water meter collector that the utility model provides can be with reference to shown in the following table.
A kind of data of water meter collector that the utility model provides because the housing of encapsulation collector is directly installed on the copper mouth of water meter, so that inner Magnetic Sensor can noncontact be sensed the rotation of water meter needle, thereby detects flow pulse.Even also can normally measure under power-down conditions, it is more convenient to install, and does not need to change original base table structure.
The preferred implementation of a kind of data of water meter collector that the above only provides for the utility model does not consist of the restriction to the utility model protection domain.Number of components among this embodiment is not limited to the mode that adopts among the embodiment; any any modification of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the claim protection domain of the present utility model.
Claims (7)
1. a data of water meter collector is characterized in that, comprising: flow sensing unit, pressure measurement cell, valve control unit, switch input block, micro controller unit, communication unit and power supply unit; Wherein, described flow sensing unit, pressure measurement cell, valve control unit, switch input block, communication unit, power supply unit are connected with described micro controller unit respectively, and are packaged in the housing, and described housing is installed on the copper mouth of described water meter.
2. data of water meter collector according to claim 1 is characterized in that, described communication unit is the RS485 communication interface.
3. data of water meter collector according to claim 1 is characterized in that, described flow sensing unit comprises: sensor and testing circuit; Described sensor is perpendicular to the top that is installed in the dial plate needle, and is connected with described testing circuit; Described testing circuit receives the pulse signal that described sensor sends.
4. data of water meter collector according to claim 3 is characterized in that, described sensor is Hall element.
5. data of water meter collector according to claim 1 is characterized in that, described pressure measurement cell comprises: I/V transfer resistance, operational amplifier and A/D converter; Described I/V transfer resistance sends to described operational amplifier with voltage signal; Described operational amplifier sends to voltage signal described A/D converter again.
6. data of water meter collector according to claim 1 is characterized in that, described valve control unit comprises: prevented moment of torsion circuit, relay drive circuit and relay; Describedly prevented that the moment of torsion circuit was connected with described relay drive circuit; Described relay drive circuit is controlled opening or closing of described valve.
7. data of water meter collector according to claim 1 is characterized in that, described communication unit is the RS485 communication interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220612638 CN202915962U (en) | 2012-11-19 | 2012-11-19 | Water meter data collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220612638 CN202915962U (en) | 2012-11-19 | 2012-11-19 | Water meter data collector |
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| Publication Number | Publication Date |
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| CN202915962U true CN202915962U (en) | 2013-05-01 |
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| CN 201220612638 Expired - Fee Related CN202915962U (en) | 2012-11-19 | 2012-11-19 | Water meter data collector |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105823521A (en) * | 2015-05-18 | 2016-08-03 | 安庆供水集团公司 | Remote water meter data acquisition system |
| CN105825648A (en) * | 2015-05-17 | 2016-08-03 | 安庆供水集团公司 | Long-range positioning control water gauge data acquisition system |
| CN105823520A (en) * | 2015-05-17 | 2016-08-03 | 安庆供水集团公司 | Data acquisition system of remote water meter for data analysis |
| CN106525168A (en) * | 2016-11-15 | 2017-03-22 | 广州市兴世电子有限公司 | Flowmeter signal collector |
| CN108645555A (en) * | 2018-08-12 | 2018-10-12 | 西南大学 | A method of realizing that tractor shear stress senses using magnetic induction |
| CN108645556A (en) * | 2018-08-12 | 2018-10-12 | 西南大学 | A kind of tractor resistance detection device |
| CN109141567A (en) * | 2018-08-03 | 2019-01-04 | 武汉路宝市政建设配套设施有限公司 | A kind of meter box convenient for inquiry |
-
2012
- 2012-11-19 CN CN 201220612638 patent/CN202915962U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105825648A (en) * | 2015-05-17 | 2016-08-03 | 安庆供水集团公司 | Long-range positioning control water gauge data acquisition system |
| CN105823520A (en) * | 2015-05-17 | 2016-08-03 | 安庆供水集团公司 | Data acquisition system of remote water meter for data analysis |
| CN105823521A (en) * | 2015-05-18 | 2016-08-03 | 安庆供水集团公司 | Remote water meter data acquisition system |
| CN106525168A (en) * | 2016-11-15 | 2017-03-22 | 广州市兴世电子有限公司 | Flowmeter signal collector |
| CN109141567A (en) * | 2018-08-03 | 2019-01-04 | 武汉路宝市政建设配套设施有限公司 | A kind of meter box convenient for inquiry |
| CN108645555A (en) * | 2018-08-12 | 2018-10-12 | 西南大学 | A method of realizing that tractor shear stress senses using magnetic induction |
| CN108645556A (en) * | 2018-08-12 | 2018-10-12 | 西南大学 | A kind of tractor resistance detection device |
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Granted publication date: 20130501 Termination date: 20171119 |
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| CF01 | Termination of patent right due to non-payment of annual fee |