CN2809603Y - Meter reading system of remotely-read water meter - Google Patents
Meter reading system of remotely-read water meter Download PDFInfo
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- CN2809603Y CN2809603Y CN 200520073012 CN200520073012U CN2809603Y CN 2809603 Y CN2809603 Y CN 2809603Y CN 200520073012 CN200520073012 CN 200520073012 CN 200520073012 U CN200520073012 U CN 200520073012U CN 2809603 Y CN2809603 Y CN 2809603Y
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- meter
- water meter
- remote transmitting
- collector
- meter reading
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Abstract
The utility model relates to a meter reading system for a remote transmitting water meter, which is mainly characterized in that the utility model adopts the transmission mode of the PSTN Public Switched Telephone Network. A magnetic-sensing switch sensor and small magnetic posts are arranged in a base meter of the water meter; a collector comprises a large-scale programmable logic device FPGA and a communication circuit taking a special communication chip as the main part. The utility model is an integrated system integrating the sensor technology, the meter detecting technology, the chip technology, the communication technology and the information management technology into one body; under the support of relevant software, the collector circularly detects the information of each water meter and store the information into a corresponding memory; at the time of the need of meter reading, the telephone of a corresponding collector is dialed through by a center computer and the collector can transmit the information in the memory to the center computer through the public switched telephone network. The utility model has the advantages of strong anti-interference ability, stable working, accurate metering, convenient operation, simple structure, low cost, long service life, etc. The technical scheme of the utility model is also suitable for a meter reading system of a remote transmitting gas meter.
Description
Technical field
The utility model relates to a kind of remote transmitting water meter kilowatt meter reading-out system, and system can finish the water meter copy reading, and adopts reliable communication mode that the copy reading data upload is arrived supervision and management center, belongs to intelligent field of instrumentation technology.
Background technology.
" Every household has an ammeter, reads the ammeter directly " engineering is just carried out by China at present.This is significant for using water wisely.Existing following two kinds of methods:
1, adopts IC-card prepayment intelligent water meter user to purchase water to water supply department, insert in the water meter then by the IC-card of special use.The valve opening of water meter, the user can water.When " surplus water " in the water meter was zero, the valve of water meter was closed automatically.
2, this system of teletransmission (water meter) kilowatt meter reading-out system can finish the water meter copy reading, and adopts reliable communication mode that the copy reading data upload is arrived supervision and management center.This system has been arranged, no longer needed the staff to arrive the corresponding information that the user scene can obtain the user.
Domestic existing remote transmitting water meter kilowatt meter reading-out system kind is many at present, can classify by following several modes:
From the type of water meter, divide two kinds of pulsed remote installed meter and direct-reading remote installed meters.
From transmission mode, divide wired, wireless and three kinds of modes of write by hand machine.In wired mode, nearly all be to adopt power line carrier and by bus mode work.The advantage of this transmission mode is to utilize ready-made network and solved power issue easily.But utilize power line carrier to bring power attenuation fast, frequency range is narrow, disturbs a series of shortcomings such as poor controllability.In wireless mode, GSM mode and GPRS mode are arranged.This transmission mode bit error rate height.Write by hand machine mode is that the meter reading personnel adopts the write by hand machine to make a copy of each water meter numerical value, concentrates then and passes to supervisory computer.This meter reading method is difficult to make the meter reading personnel to break away from the heavy task of checking meter.
The direct-reading remote installed meter is to add a camera on the reading code-disc of each water meter.When checking meter, to being copied the power supply of water meter camera and sending into the address, the information on the water meter code-disc is transferred to supervisory computer.Here transmission is image rather than data.Computing machine will just can provide data through complicated Digital Image Processing.The line of each water meter is (can not every water meter draw special line to supervisory computer) of series connection in addition, and when certain water meter broke down, the water meter of the binding of this water meter back can't be made a copy of.This in addition kilowatt meter reading-out system cost is too high, is difficult to generally promote.
Though remote meter-reading system has ready-made product, equipment and technology content is low, and fault occurs frequent, and is bulky, site operation trouble, inconvenient maintenance, cost height or the like deficiency.
Summary of the invention
The purpose of this utility model be at domestic existing remote transmitting water meter kilowatt meter reading-out system exist with low content of technology, fault occurs frequent, and is bulky, the site operation trouble, inconvenient maintenance, cost height or the like deficiency provides antijamming capability strong, working stability is reliable, accurate measurement, easy to operate, simple in structure, with low cost, a kind of remote transmitting water meter kilowatt meter reading-out system of long service life.
The purpose of this utility model is achieved through the following technical solutions, and a kind of remote transmitting water meter kilowatt meter reading-out system comprises pulse remote transmitting water meter, collector, central computer, it is characterized in that the transmission mode of described system adopts the PSTN public switched telephone network; Described pulse remote transmitting water meter is made up of essentic-water-meter, two magnetosensitive switch sensors, small magnetic rod and lead-in wires; Described collector comprises extensive programmable logical device FPGA, the telecommunication circuit based on the private communication chip, DC-DC power module, power supply stabilization circuit, clock circuit, lithium battery and undervoltage detection circuit.
The utility model with existing similar remote transmitting water meter kilowatt meter reading-out system relatively, it is strong to have an antijamming capability, working stability is reliable, accurate measurement is easy to operate, and is simple in structure, with low cost, advantages such as long service life have the innovation of following several respects technically:
System is that so-called passive meter reading system of passive meter reading system does not adopt 220 volts of ac power supplies exactly in system.Do not exist 220 volts of AC power to disturb like this, can improve the security of system and strengthen maintenance, repair personnel's the sense of security.Owing to do not adopt 220 volts of ac power supplies, need not huge rectifying installation, charging circuit and expensive rechargeable battery, make system architecture simple, with low cost.Because most collectors are installed in the residential building sub-district, do not adopt 220 volts of ac power supplies, just there is not the expense dispute of 220 volts of AC power;
Adopt extensive programmable logical device FPGA in the system, in remote meter-reading system, adopt extensive programmable logical device FPGA first.This compares with the kilowatt meter reading-out system that adopts single-chip microcomputer and middle small scale integrated circuit to constitute, and have significant advantage: power consumption reduces this device greatly and is operated under the low frequency state, and dynamic power consumption is extremely low.This has just guaranteed the low-power consumption of total system; Adopt FPGA that collector is detected the data message of water meter and carry out simultaneously, do not exist and leak meter Aquapulse phenomenon, guaranteed the accuracy of metering with communicating by letter of central computer; Because FPGA integrated level height has substituted single-chip microcomputer and many middle small scale integrated circuits, thereby shorten the length that internal circuit goes between, reduced the possibility that receives external disturbance, strengthened the antijamming capability of collector; Because the encryption feature of FPGA is good, the data in the collector can't be decoded, and have guaranteed the security of system; Because the field programming function that FPGA provides can be changed " handshake " and licencing key easily.
System adopts the private communication chip, adopts the modem chip of this low-power consumption of private communication chip to carry out the innovation that data communication is domestic remote meter-reading system in the collector.This chip has following characteristics: power consumption is extremely low and have park mode when collector is in non-communications status, and it is park mode that FPGA is provided with the private communication chip.This moment, consumed current was only several microamperes.When central computer dials when checking meter to collector, the private communication chip just returns to normal operating conditions.This moment, working current also had only several milliamperes.After about 10 seconds, get back to park mode again; The private communication chip carries out data transmission based on the communication protocol of maturation, has guaranteed reliability of data transmission.Characteristics such as the private communication chip can insert in the existing P STN public switched telephone network easily, makes to have compact conformation `, and installation and maintenance is convenient.
System adopts mistor to make sensor in the pulse remote transmitting water meter, does not adopt the magnetosensitive on-off element to make sensor, considers from power consumption.General on-off element sensor has the closed and disconnected two states.When closure, connect the direct earthing of input port of sensor, cause internal current to increase easily, thereby power consumption increase.And adopt mistor to make sensor, and under the effect in magnetic field, just resistance reduces, and the input port that connects sensor is direct earthing not, has also just reduced the current drain of input port.
The utility model integrates the system ensemble of sensor technology, instrument detection technique, chip technology, the communication technology and information management technique.A central computer is installed in the management of residential district chamber and is equipped with teletransmission meter reading data library management software; A door of residential quarters collector of installation.Each collector is connected with central computer by public switched telephone network (PSTN).Collector links to each other with this every water meter by lead-in wire simultaneously.The information of every water meter of collector cycle detection also deposits in the corresponding storer.When needs are checked meter, put through the phone of corresponding collector by central computer, then this collector just is sent to central computer with the information in the storer by public switched telephone network.Technical solutions of the utility model also are applicable to the remote transmitting gas meter kilowatt meter reading-out system.
Description of drawings
Fig. 1 is the utility model system schematic block diagram;
Fig. 2 is that pulse remote transmitting water meter structure reaches and the collector connection diagram in the utility model;
Fig. 3 is a collector circuit block diagram in the utility model;
Embodiment
Further specify the utility model in conjunction with the accompanying drawings and embodiments, the utility model is made of this four part of pulse remote transmitting water meter, collector, PSTN public switched telephone network and central computer, the pulse remote transmitting water meter is by essentic-water-meter, two magnetosensitive switch sensor K1, K2, a small magnetic rod and four lead-in wires are formed, and essentic-water-meter is used for the discharge metering.One in two magnetosensitive switch sensors is used for converting discharge to the Aquapulse signal; Near another high-intensity magnetic field that is used for the water meter detects.Article four, lead-in wire is connected the pulse remote transmitting water meter with collector.Two magnetosensitive switch sensor K1, K2 are two mistors in native system, and mistor K1 is used to form the Aquapulse signal, and it is installed in 0.001m
3The water wheels bottom.Small magnetic rod is attached to 0.001m
3Water wheels on.In water meter, there are current out-of-date, along with 0.001m
3The rotation of water wheels, small magnetic rod are also along with rotation.When small magnetic rod forwarded K1 mistor correspondence position to, the K1 resistance sharply descended; And when leaving this position, the K1 resistance increases rapidly, and reverts to this true value.Along with 0.001m
3Water wheels rotate a circle, and the resistance of mistor K1 descends once and increases once.Sort signal is converted into digital pulse signal in collector, and the water yield that flows through in the corresponding water meter of pulse signal is 0.01m
3Mistor K2 is installed near the position of mistor K1, but is not subjected to the influence of small magnetic rod.Under normal circumstances, the K2 resistance is this true value.Have only when high-intensity magnetic field occurring near the water meter, the K2 resistance just sharply descends.High-intensity magnetic field near water meter, occurs and cause the K1 resistance to descend, can not recover, in the time of also just can not producing pulse signal, cause the K2 resistance to descend equally.High-intensity magnetic field has appearred near collector collects K2 when being low resistance, just knows water meter.K2 in the water meter is in order to keep metering accuracy, to prevent that water is provided with steathily.
Collector among Fig. 1 is the core of remote meter-reading system circuit design.It comprises on-the-spot extensive programmable logical device FPGA, the telecommunication circuit based on the private communication chip, DC-DC power module, power supply stabilization circuit, clock circuit, lithium battery and undervoltage detection circuit.
The DC-DC power module is the telephone line output voltage to be converted to+5 volts DC voltage, and voltage conversion circuit can adopt existing ripe circuit; Then by voltage stabilizer surely to the needed voltage of FPGA.Voltage range is between the 40-70 volt when considering telephone set on-hook and ring, so the DC-DC power module adopts wide voltage input.Its input voltage range is the 36-72 volt; And output voltage is fixed as 5.0 volts, and imports, exports maintenance and isolate.Because the internal state machine operating voltage of FPGA is 2.5 volts, the I/O port voltage is 3.0 volts, so the output of power module lies prostrate and 3.0 volts through HT7325 and the voltage stabilizing to 2.5 of HT7130 difference, powers to FPGA.(telephone set is in the simulation off hook state) telephone line output voltage is less than 10 volts, so added 3.6 volts of lithium batteries in the collector when communication.At ordinary times by the power module power supply.Only when causing telephone line to interrupt, communication or mishap just switch to lithium battery power supply.When mishap occurring and cause telephone wire to interrupt, lithium battery is powered for a long time, causes lithium battery under-voltage easily.In circuit, added the battery undervoltage detection circuit of forming by voltage-level detector HT7033.When lithium battery forces down in 3.3 volts, the HT7033 output low level; Otherwise output high level.
The needed oscillator signal of FPGA is provided by the HYM8563 clock chip.This chip can stably be exported the voltage waveform of respective frequencies at the crystal of external corresponding frequencies and when inserting power supply.The FPGA input port of appointment is received in the output of HYM8563 chip.FPGA is operated under this low frequency frequency, is favourable to the dynamic power consumption that reduces chip.
Selecting the master chip of private communication chip as telecommunication circuit for use, is not only because of low in energy consumption, and because of the communication protocol based on maturation, and can guarantee reliability of data transmission.
When collector was operated in non-communications status, the private communication chip was in park mode.At this moment the chip current sinking only is several microamperes.When central computer when collector dials, ringdown wakes the private communication chip up.This chip sends meter reading request signal to FPGA.FPGA realizes the communication overall process by the operation to the private communication chip.Sign off, FPGA operation private communication chip comes back to park mode.
Claims (5)
1, a kind of remote transmitting water meter kilowatt meter reading-out system comprises pulse remote transmitting water meter, collector, central computer, it is characterized in that the transmission mode of described kilowatt meter reading-out system adopts the PSTN public switched telephone network; Described pulse remote transmitting water meter is made up of essentic-water-meter, magnetosensitive switch sensor, small magnetic rod and lead-in wire; Described collector comprises extensive programmable logical device FPGA, the telecommunication circuit based on the private communication chip, DC-DC power module, power supply stabilization circuit, clock circuit, lithium battery and undervoltage detection circuit.
2, a kind of remote transmitting water meter kilowatt meter reading-out system according to claim 1, the magnetosensitive switch sensor that it is characterized in that the pulse remote transmitting water meter is two mistors, mistor K1 is installed in essentic-water-meter 0.001m
3The water wheels bottom, small magnetic rod is attached to 0.001m
3Water wheels on, mistor K2 is installed near the position mistor K1.
3, a kind of remote transmitting water meter kilowatt meter reading-out system according to claim 1, it is characterized in that the DC-DC power module is the telephone line output voltage to be converted to+5 volts DC voltage, the output of power module lies prostrate and 3.0 volts through power supply stabilization circuit HT7325 and the voltage stabilizing to 2.5 of HT7130 difference, meets logical device FPGA.
4, a kind of remote transmitting water meter kilowatt meter reading-out system according to claim 1 is characterized in that undervoltage detection circuit is made up of voltage-level detector HT7033.
5, a kind of remote transmitting water meter kilowatt meter reading-out system according to claim 1 is characterized in that clock circuit is made of the HYM8563 clock chip, the crystal of the external corresponding frequencies of HYM8563 chip, and the FPGA input port of appointment is received in the output of HYM8563 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520073012 CN2809603Y (en) | 2005-06-22 | 2005-06-22 | Meter reading system of remotely-read water meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520073012 CN2809603Y (en) | 2005-06-22 | 2005-06-22 | Meter reading system of remotely-read water meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2809603Y true CN2809603Y (en) | 2006-08-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520073012 Expired - Fee Related CN2809603Y (en) | 2005-06-22 | 2005-06-22 | Meter reading system of remotely-read water meter |
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| CN (1) | CN2809603Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105070022A (en) * | 2015-08-31 | 2015-11-18 | 深圳市金博通科技有限公司 | Meter end device and wireless meter reading system and method |
-
2005
- 2005-06-22 CN CN 200520073012 patent/CN2809603Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105070022A (en) * | 2015-08-31 | 2015-11-18 | 深圳市金博通科技有限公司 | Meter end device and wireless meter reading system and method |
| CN105070022B (en) * | 2015-08-31 | 2019-11-08 | 深圳市金博通科技有限公司 | Instrument end device, wireless kilowatt meter reading-out system and method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |