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AMR / Wireless remote water meter system
System installation and composition editing
1. Wireless remote water meter
2. Building concentrator
3. Community center concentrator
4. Intelligent meter reading network system software
5. Management computer
System equipment introduction editor
A. Wireless remote water meter
Picture
2. Main technical indicators:
(1) Power supply voltage: DC3.6V (1 lithium-ion battery)
(2) Rated working pressure: ≤1.6Mpa
(3) Ambient temperature: -30 ° C ~ +60 ° C
(4) Relative humidity: 30% to 95% RH
(5) Working life: 10 years
(6) Working frequency: 472.5MHz
(7) Micro-transmitting power: ≤50mW
(8) Receive current ≤ 5mA, emission current ≤ 90mA, current at sleep is only ≤ 20 & micro; A.
(9) Receive sensitivity is higher than -100dBm
(10) Water medium temperature: 0 ° C ~ 40 ° C (cold water), 0 ° C ~ 95 ° C (hot water)
B. T R-131 type building wireless meter concentrator
1. Function:
(1) The management table number, electronic meter number, and difference compensation of the management range can be flexibly set.
(2) It can automatically calculate 90-day historical data and record it every 10 days to facilitate the property company, water company, gas company and power company to keep track of the user's detailed usage information.
(3) Support single-table meter reading, and batch meter reading, automatic record of various fault information uploaded by the watch, automatic record has been installed, no watch installed
(4) Support wireless remote transmission and manual meter reading.
2. Technical indicators:
(1) Equipment model: TR-131;
(2) Interface characteristics: The interface is compatible with the EIA/TIA RS-485 standard, wireless communication;
(3) Power supply voltage: 220V or solar energy;
(4) Current: quiescent current ≤ 5mA; Operating current: ≤ 100mA (maximum capacity of 200 tables).
(5) Communication mode: the upper computer can communicate via wireless communication, or RS485, and RS232 with the hand-held device;
(6) Isolation: isolation voltage 3500VRMS 500VDC continuous;
(7) Protection level: 600W lightning surge protection per line of RS-485 interface;
(8) Use environment: Temperature: -5 ° C ~ 55 ° C, relative humidity: 5% to 95%.
C. Residential wireless meter reading concentrator
1. Function:
(1) The interface device connected to the local computer host realizes the conversion of the RS-232 level and the RS-485 bus level of the computer serial port;
(2) Half-duplex communication mode, zero-delay automatic transmission and reception direction conversion.
(3) Equipment for automatically copying the data of the building concentrator;
(4) The fast transient voltage suppressor (TVS) provides 600W of surge protection power per line, effectively suppressing lightning and ESD, preventing lightning strikes and common ground interference.
2. Technical indicators:
(1) Equipment model: TR-135;
(2) Working power supply: 220V;
(3) Communication method: With the host computer: Connect the computer host RS-232 serial port; and the lower computer: wireless communication;
(4) Maximum capacity: 3000 pieces
(5) Working environment: Temperature: -5 ~ +55 °C; Humidity: 5 ~ 95% RH.
System function editing
1. Can set the meter reading item
You can set the monthly accumulation, calculation rate, meter reading date, automatic check when entering, and abnormal usage alarm.
2. Regional management
Area information can be added, modified, and deleted to create a regional database.
3. Device reading and writing
Data collection, area concentration, data reading, area configuration, write number information, read number information, write remark information, write modem configuration read device information, write timing meter reading, control lookup operation.
4. Find options
The required information can be inquired by the household number, the household name, the name of the household, the ID card, the telephone number, and the house number.
5. Phenotypic settings
Freely set phenotypes such as: water meters, pure water meters, warm water meters, electric meters, air conditioning meters, gas meters, etc.
6. Communication settings
Set Modem and RS232 communication mode selection, RS232 mode, Modem mode two meter reading modes
7. Equipment Management
Mainly for the management of building concentrators and wireless meters, the cell concentrator is the core part of the system.
8. Regional configuration
Write the number information (affiliation) of each land concentrator and the table to the corresponding cell concentrator.
9. Data collection (cell management mode)
Line number, status, fault information, "data collection"
10. Data reading
Take the data from the regional concentrator back to the system and complete a reading.
11. Meter reading date
The system can automatically complete the meter reading work at a certain time of the month.
12. Check
Check all the household equipment interface information entered, and list the duplicated tables for reference during calibration.
13. Equipment Checker
The device checker is responsible for repeating the specified table that is incorrectly present in the system due to a misoperation.
14. Rate setting
Set basic base, base rate, premium rate, limit base, and limit rate.
15. Rate
In a nutshell, the rate is the price of resources such as water, electricity, and gas. However, depending on the method of calculating the selected fee, the different usage of the household and the price of the resource are different, that is, the basic rate, the limited rate, and the rate are added.
16. Meter reading
At the fixed time of each month (the meter reading date), the system reads the table data, calculates the usage amount of the current month, and distributes the loss according to the loss ratio, and calculates the entire process according to the rate.
17. Meter Reading Manager
In the meter reading manager, you can “patrol” and “watch” and print out the “list of readings”.
18. Single household meter reading
For short-term households such as renters (because households may withdraw their rent at any time), they must pay a separate meter for their households at any time, and the system provides a “single household meter reading” function.
19. Print payment report
Generate expense data files based on the requirements of the property management software.
Site construction editor
Basic principle
When the communication distance is required to be several tens of meters to hundreds of meters, the micro-power wireless communication is used as the transmission mode, and the meter is placed between the building concentrators, and the wireless communication is taken as communication between the building concentrator and the cell concentrator. The following are some of the basic principles of installation of wireless communication concentrators:
2. Wireless communication structure and distance:
Wireless communication is easily affected by the external environment in the user's use environment, such as the environment between the residential buildings, the height of the residential floors, the distance between the buildings, the interference sources of the urban wireless communication environment, and the residential room structure. There is a big impact. Therefore, the installation of the watch, the installation of the building concentrator, the installation of the cell concentrator, in particular the wireless communication antenna of the building concentrator, the wireless communication antenna of the cell concentrator. If the hand concentrator is used to copy the building concentrator, the building concentrator can be installed in the corridor, and the antenna can lead the outdoors. If a community concentrator is used to take the building concentrator, the building concentrator is recommended to be installed on the roof. The concentrator installed on the roof can be powered by solar energy or 220V mains.
3. Factors affecting communication effectiveness
The concentrator layout is unreasonable:
The building concentrator should be installed in the center of a certain unit of the building as much as possible to ensure that the data of the entire building can be copied.
distance is too far:
Since the wireless communication is affected by the transmission power, the communication distance cannot be too far. The general communication distance is 11 floors in the building, and the open environment is greater than >500 meters.
System feature editing
1. Low-power pulse meter with long service life
The watch uses a pulse meter and the system power consumption is very low. A 3.6V 2A/h disposable lithium battery can be used for up to 6 years.
2. Real-time monitoring of the status of the watch
Set a minimum number of transmissions and minimum transmission interval and watch number in the wireless meter. The wireless meter collection meter automatically measures the pulse or direct reading data, and checks the power, tamper, anti-shear, magnetic interference and other data. When the meter judges that the minimum number of transmissions is satisfied, the metering data and the power source, tampering, anti-shearing, magnetic interference and the like are wirelessly transmitted to the concentrator, and if the minimum transmission number is not met within the minimum transmission time interval, the minimum is satisfied. Data such as metering data and power supply, tampering, anti-shearing, and magnetic interference are wirelessly transmitted to the concentrator during the interval.
3. The table address is unique
The table has a unique address, and the system reads only uniquely. No matter where the table is, the system only recognizes the table address.
4. The data adopts advanced verification method to ensure reliable system data.
The meter output is an accurate table reading with a check code (16-bit CRC code). If the meter reading is disturbed during transmission and the meter reading is not accurate at the receiving end, the check code will also be incorrect. After the test, the meter reading has been changed, and the system will send it three times in a set time to ensure that the readings read by the system will not be transmitted due to transmission.
5. Simple and convenient construction
Each building concentrator can receive up to 200 pieces of water meter data, no wiring is required, and the meter number in the building concentrator can be flexibly set, deleted, modified and other functions.
6. Flexible configuration
The wireless watch does not need to be set after leaving the factory to reduce system debugging tasks.
7. Remote networking
Centralized management of the cell, through the cell concentrator, the data of the table in any area of the city can be collected at any position in the city, and the telephone, the broadband network, and the wireless transmission are provided in various ways to realize long-distance communication without the limitation of distance, and form The middle layer of the facts, the real meter reading to the household.
8. Anti-lightning strike
There is no connection, no lightning impact on the system.
9. Easy to read the meter
The system administrator can use the GPRS, CDMA, hand-written device, telephone network or broadband network to log in the system to read the readings of each meter in the area at any time and any place, and truly ensure that the management department does not enter the household to complete the meter reading work. .
10. Easy to maintain
The system can immediately reflect the fault of the connection line and accurately locate it, and the service personnel can log in to the system through the telephone network or broadband network for remote maintenance.
