CN201556290U - Data acquisition unit of automatic meter reading system - Google Patents

Data acquisition unit of automatic meter reading system Download PDF

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Publication number
CN201556290U
CN201556290U CN2009201994983U CN200920199498U CN201556290U CN 201556290 U CN201556290 U CN 201556290U CN 2009201994983 U CN2009201994983 U CN 2009201994983U CN 200920199498 U CN200920199498 U CN 200920199498U CN 201556290 U CN201556290 U CN 201556290U
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CN
China
Prior art keywords
data acquisition
acquisition unit
data
main control
control chip
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 - Fee Related
Application number
CN2009201994983U
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Chinese (zh)
Inventor
顾海松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Hengye Electronic Co Ltd
Original Assignee
Zhejiang Hengye Electronic Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhejiang Hengye Electronic Co Ltd filed Critical Zhejiang Hengye Electronic Co Ltd
Priority to CN2009201994983U priority Critical patent/CN201556290U/en
Application granted granted Critical
Publication of CN201556290U publication Critical patent/CN201556290U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a data acquisition unit of an automatic meter reading system, comprising a main control chip, a carrier transceiving module, a data acquisition module and a reinsurance state acquisition module, wherein the carrier transceiving module conducts bidirectional data transmission with the main control chip; the data acquisition module is used for collecting data and conducts bidirectional data transmission with the main control chip; the reinsurance state acquisition module monitors a reinsurance state in real time and actively sends the reinsurance state to the main control chip; and the communication mode of the data acquisition unit and the data concentrator is a low-voltage power line carrier communication mode. Due to the adoption of the technical scheme, the data acquisition unit collects cell electricity utilization data and protection circuit state through the power line carrier communication mode, and can collect cell electricity utilization data in real time and monitor the protection circuit state in real time.

Description

The data acquisition unit of Automatic meter reading system
Technical field
The utility model relates to a kind of data acquisition unit of Automatic meter reading system.
Background technology
Collector is the on-site data gathering equipment of intelligence table Automatic meter reading system.It is responsible for realizing that the table code data with in the intelligence table is transferred to concentrator by power line carrier communication.The data acquisition unit of existing Automatic meter reading system can not be gathered the residential electricity consumption data in real time.
The utility model content
Technical problem to be solved in the utility model provides a kind of data acquisition unit of Automatic meter reading system, can gather the residential electricity consumption data in real time.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: the data acquisition unit of Automatic meter reading system, comprise main control chip, the carrier transmitting-receiving module, data acquisition module, code insurance state acquisition module, carrier transmitting-receiving module and main control chip carry out bidirectional data transfers, data acquisition module is responsible for image data, carry out bidirectional data transfers with main control chip, code insurance state acquisition module is monitored the code insurance state in real time, initiatively will give main control chip on the code insurance state, the communication mode of described data acquisition unit and data concentrator is the low-voltage powerline carrier communication mode.
Described data acquisition unit and ammeter communication mode are the RS485 communication mode.
Further also comprise the duty indicating module, this duty indicating module is connected by I/O with main control chip, the real-time display system running status.
Described data acquisition unit adopts transformer step-down power supply.
The utility model by the power line carrier, PLC mode, is gathered community user electricity consumption data and holding circuit state owing to adopted technique scheme.Can gather the residential electricity consumption data in real time, in real time the monitoring and protecting circuit state.
Description of drawings
Fig. 1 is the line frame graph of the data acquisition unit of the utility model Automatic meter reading system.
Fig. 2 is the main control chip circuit diagram of this data acquisition unit.
Fig. 3 is the power circuit diagram of this data acquisition unit.
Fig. 4 is that the carrier wave of this data acquisition unit receives and radiating circuit figure.
Fig. 5 is the data acquisition interface circuit diagram of this data acquisition unit.
Fig. 6 is the PORTA code insurance state acquisition interface circuit figure of this data acquisition unit.
Fig. 7 is the PORTB code insurance state acquisition interface circuit figure of this data acquisition unit.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is further described.
Fig. 1 is the line frame graph of the data acquisition unit of the utility model Automatic meter reading system.Power supply 3 provides work required power supply to total system.What carrier transmitting-receiving module 2 and main control chip 1 carried out is two-way data transmission.Duty indicating module 4 is connected by common I/O with main control chip 1, the real-time display system running status.Data acquisition module 5 is responsible for image data, carries out two-way data transmission with main control chip 1.Code insurance state acquisition module 6 is monitoring code insurance state in real time, initiatively will give main control chip 1 on the code insurance state.
Fig. 2 is the main control chip circuit diagram of this data acquisition unit.The native system main control chip adopts Beijing lucky star journey PL3106C dawn, and this is integrated 8051 kernels, carrier wave coding and decoding, the chip of carrier transmitting-receiving circuit.The 5V operating voltage, centre carrier frequency 120kHz, bandwidth 15kHz.9.6M crystal oscillator provides work clock for main control chip 1, the sub-crystal oscillator of 32.768KHz provides oscillation source in real time for pattern.
Fig. 3 is the power circuit diagram of this data acquisition unit.Adopt transformer step-down power supply.
Input voltage: Ub70%-Ub120%.
Output voltage: primary power is 12V/150mA; External interface (RS485 communication, impulse sampling) power supply is 11V/50mA.
The 220V alternating current is through transformer T1 step-down, and at secondary output two-way power supply, one group through rectifier bridge D704 rectification, pass through three-terminal regulator block U702 voltage stabilizing again after, working power is provided for main control chip and external circuit thereof.Other one group of mode rectification of then using half-wave rectification, pass through three-terminal regulator block UVD2 voltage stabilizing again after, working power is provided for the RS485 chip.The 78L05 front end provides emission power (12V/150mA) for the carrier transmit amplifying circuit.
Fig. 4 is that the carrier wave of this data acquisition unit receives and radiating circuit figure.The carrier wave receiving circuit is coupled by coil, and signal is coupled to receiving circuit from electrical network, and through pressure limiting, filtering is capacitively coupled to carrier chip.Receiving circuit requires receiving sensitivity height, received signal " totally ".
US6M2 is the NMOS and the PMOS complex pipe of band overvoltage protection in the carrier transmit circuit; can bear maximum current 1A; the power supply capacity of system's electric power system is 12V/150m A, increases current-limiting resistance R207 simultaneously, therefore the situation that overcurrent causes metal-oxide-semiconductor to burn out can not occur.ZD201 among the figure is a schottky diode, plays two effects at this: 1) withstand voltage is 20V, and the Vsg voltage of the P raceway groove of assurance MOS1 is less than 20V; 2) utilize its forward conduction voltage low, guarantee that Vgs is no more than the withstand voltage of MOS1.Thereby protection metal-oxide-semiconductor.
Capacitor C 221 is formed three group carrier wave coupled circuits with transformer T5, capacitor C 223 with transformer T6 with transformer T4, capacitor C 222.Mainly contain two effects: system and high-voltage fence are isolated and carrier signal delivered on the electrical network or from electrical network and obtain carrier signal.With PMOS and the compound metal-oxide-semiconductor MOS1 of NMOS is that this part circuit at center is the carrier wave amplifying circuit, and carrier signal is carried out power amplification through amplifying circuit, passes through C205, L202 frequency-selecting again, delivers to electrical network after the shaping.The carrier signal that receives receives pin through a series resonant circuit and a resonant circuit frequency-selecting in parallel, shaping through the carrier wave of delivering to main control chip behind two diode amplitude limits.
Fig. 5 is the data acquisition interface circuit diagram of this data acquisition unit.System requirements is gathered the user power utilization data by the RS485 communication modes, simultaneously monitor user ' power protector state.What power protector was exported is the passive switch state, therefore, and with interrupt mode monitor user ' power protector.Guarantee accurately to collect the state of user power utilization protector.
The RS485 control mode of the criteria of right and wrong that this circuit adopts, U402 receives control, and U403 sends control and enables control, and PTC401 and TVS401 form a complex protection RS485 holding circuit.Being connected between this circuit and the main control chip is to connect by the UART interface.
Fig. 6 and Fig. 7 are the code insurance state acquisition interface circuit figure of this data acquisition unit.The family expenses earth leakage protective device meets PORTA and PORTB, in case the family expenses earth leakage protective device hinders tripping operation for some reason, and PORTA and PORTB meeting conducting, optocoupler N101 conducting.When PULIN is flat high level, at this moment can step-down, just produced the impulse hits of a negative edge, MCU can detect this pulse constantly, in case catch, sends to concentrator, and reporting to the police, this leaks and protects fault.
Because code insurance output is passive signal, when gathering the code insurance status signal, provide power supply for it.The input end of optocoupler N101 is code insurance state input port, and output terminal is connected to an interruption input port of main control chip.Main control chip is monitored the code insurance state by interrupt mode.
The data acquisition unit of the utility model Automatic meter reading system and concentrator communication mode are the low-voltage powerline carrier communication mode, and data acquisition unit and ammeter communication mode are the RS485 communication mode.
RS485 communication MAX1348 chip, the two wires control mode, communication line adds protection circuit.Adopt the optocoupler coupling way of output because of the interface section, the system core and peripheral interface device require electrical isolation.
After system powers on, power transfer module with the 220V power source conversion become carrier wave amplifying circuit power supply (+12V) and system's primary power (+5V).
After power module provided stable power to system, system began initialization, and system initialization finishes.Can observe system initialization process and initialization result thereof by state indication etc.
After initialization was finished, the carrier transmitting-receiving module was in accepting state, and data acquisition module is in accepting state, and the code insurance state acquisition is in accepting state.
When system receives data acquisition command, carry out order accordingly, and data are returned.System also carries out the timed task of prior setting.The data of collecting are temporary, and the wait data concentrator is got.
The effect of this data acquisition unit is in kilowatt meter reading-out system, be responsible for to realize the conversion of RS485 passage to the conversion of carrier channel or RS485 passage to the RS485 passage.Acquisition terminal on the one hand carries out exchanges data with concentrator by carrier channel or RS485 passage, on the other hand the ammeter communication by check meter RS485 mouth and RS485 type.This equipment have at a distance check meter, precision height, reliability height, good stability.

Claims (4)

1. the data acquisition unit of Automatic meter reading system, it is characterized in that: comprise main control chip (1), carrier transmitting-receiving module (2), data acquisition module (5), code insurance state acquisition module (6), carrier transmitting-receiving module (2) is carried out bidirectional data transfers with main control chip (1), data acquisition module (5) is responsible for image data, carry out bidirectional data transfers with main control chip (1), code insurance state acquisition module (6) is monitored the code insurance state in real time, initiatively will give main control chip (1) on the code insurance state, the communication mode of described data acquisition unit and data concentrator is the low-voltage powerline carrier communication mode.
2. according to the data acquisition unit of the described Automatic meter reading system of claim 1, it is characterized in that: the communication mode of described data acquisition unit and ammeter is the RS485 communication mode.
3. according to the data acquisition unit of the described Automatic meter reading system of claim 1, it is characterized in that: also comprise duty indicating module (4), this duty indicating module (4) is connected the real-time display system running status with main control chip (1) by I/O.
4. according to the data acquisition unit of the described Automatic meter reading system of claim 1, it is characterized in that: described data acquisition unit adopts transformer step-down power supply.
CN2009201994983U 2009-10-29 2009-10-29 Data acquisition unit of automatic meter reading system Expired - Fee Related CN201556290U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009201994983U CN201556290U (en) 2009-10-29 2009-10-29 Data acquisition unit of automatic meter reading system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009201994983U CN201556290U (en) 2009-10-29 2009-10-29 Data acquisition unit of automatic meter reading system

Publications (1)

Publication Number Publication Date
CN201556290U true CN201556290U (en) 2010-08-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009201994983U Expired - Fee Related CN201556290U (en) 2009-10-29 2009-10-29 Data acquisition unit of automatic meter reading system

Country Status (1)

Country Link
CN (1) CN201556290U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103761856A (en) * 2014-02-20 2014-04-30 国网上海市电力公司 Data monitoring collector
CN105788217A (en) * 2016-03-22 2016-07-20 四川长虹网络科技有限责任公司 Automatic meter reading equipment and system suitable for old water meters

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103761856A (en) * 2014-02-20 2014-04-30 国网上海市电力公司 Data monitoring collector
CN105788217A (en) * 2016-03-22 2016-07-20 四川长虹网络科技有限责任公司 Automatic meter reading equipment and system suitable for old water meters

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100818

Termination date: 20181029