NB-IOT ultrasonic valve controlled water meter

NB-IOT ultrasonic valve controlled water meter
The module adopts NB IoT module modulation and demodulation design, which solves the decentralized ultra long distance communication problem of small data volume in complex environments. Compared to traditional modulation techniques, HY-WL also has advantages in suppressing same hop interference, solving the drawbacks of traditional design schemes that cannot simultaneously consider distance, high power consumption, and the need for a central gateway. The chip integrates a+23dBm adjustable power amplifier, which can achieve a receiving sensitivity of -129dBm for wireless remote transmission. This solution is feasible for applications that require high reliability for long-distance transmission.


Product Overview
1. Product Overview
The module adopts NB IoT module modulation and demodulation design, which solves the problem of ultra long distance communication with small data volume in complex environments. Compared to traditional modulation techniques, HY-WL also has advantages in suppressing same hop interference, solving the drawbacks of traditional design schemes that cannot simultaneously consider distance, high power consumption, and the need for a central gateway. The chip integrates a+23dBm adjustable power amplifier, which can achieve a receiving sensitivity of -129dBm for wireless remote transmission. This solution is feasible for applications that require high reliability for long-distance transmission.

2. Technical parameters
(1) NB oT module modem:
Without the need for a central gateway, a NB oT base station can be used to operate on a frequency band of 850M (Band5), which belongs to the NB IoT dedicated frequency band,; No need to apply for frequency point: peak output power+23dBm; receiver sensitivity quotient -129dBm:
(2) Power consumption
Working voltage 3.1V-4.2V, typical value 3.6V
Supports multiple low-power operation modes
Sleep power consumption<10uA
Peak working current 260mA
(3) Basic functions
A. 32-bit microcontroller;
B、 Support low-power serial port (LEUART) communication, TTL level 3V, baud rate up to 9600bps:
C、 Semi transparent/fully transparent communication method, directly communicating with the server through a low-power serial port
D、 Supports AES128 encryption
E、 Compatible with NanoSlMeSIM;
F、 It can read parameters, set parameters, report data, and issue instructions through a low-power serial port.

3. Functional features
1) Moisture protection
The base table and plastic shell base, as well as the plastic shell base and plastic upper shell, are both designed with full sealing, achieving IP65.
2) Low power consumption
All components are equipped with low-power products to extend the lifespan of the battery.
3) Data collection
Can automatically collect pulse signals from electromechanical sensors, using a dual Hall/dual reed sampling method
4) Data upload method
① TheTimed upload method——
When the internal clock of the wireless remote water meter reaches the required time for data upload set by the system, the meter actively uploads real-time data and obtains relevant commands.
② TheManual upload method——
At any time, users can upload real-time data and obtain relevant commands by pressing the function button in the wireless remote water meter.
5) Online configuration data upload time
Customers can configure the data upload time online through the backend system according to their needs. There are two ways to upload the time: one is XX days, YY hours, and ZZ minutes, and the data is uploaded at YY hours and ZZ minutes with XX days as the cycle. Another way is to upload data on a monthly basis on XX day of each month at YY hour and ZZ minute.
6) Remote valve closing
The valve can be remotely closed through the backend service system. When the valve is closed, users cannot open it through the function button. This function can solve user arrears and cooperate with the backend prepayment function.
7) Remote valve opening
The valve can be remotely enabled through the backend service system. After receiving the enable valve command, the meter will not automatically open the valve and needs to manually trigger the function button to open the valve.
8) Valve protection
When encountering a valve malfunction, the valve fails to close properly, but the instrument can still maintain data sampling
9) Power on and send data
When the system detects that the alkaline battery has changed from non-existent to present and meets the power on requirements, it automatically uploads data and provides sufficient protection against battery shaking or malicious frequent power on and off.
10) Battery monitoring
When the battery voltage is lower than the set "undervoltage value", the LCD panel will display the character "low battery" and automatically send data to the backend service system.
If the battery voltage is lower than the set "valve closing voltage value", a prompt should be given to close the valve. After replacing the battery, restore normal operation and press the function button to open the valve.
11) Remaining amount and unit price return
When the instrument data is uploaded, the backend system automatically calculates the user's remaining amount and returns it to the instrument along with the current unit price. Users can check the relevant information through the LCD panel.
12) LCD constant display
The LCD of the watch is in normal display mode, usually displaying the user's remaining amount or water volume. Through the function buttons, users can view the remaining amount or water volume, tap water unit price, clock year month day, clock hour minute second, and the last 8 digits of the communication meter number.
When the remaining amount or water volume is zero, the system will notify the user in the form of a text message and provide a prompt in the water company's system. At the same time, the valve can be closed in a timely manner or a one-time overdraft amount can be given according to the water company's system settings (the meter can achieve prompt valve closure), bringing convenience to the user's use.
13) Upload data error function
To avoid data channel congestion caused by simultaneous access of a large number of instruments, different peak shifting mechanisms can be set up for handling large amounts of concurrent data.
14) Fault tolerance mechanism for timed data upload
If the data is not successfully uploaded at once during scheduled upload, the instrument will wait for the corresponding time and try sending again.
15) Internal clock network timing
The instrument adopts a hard clock with an accuracy of ± 5ppm internally, ensuring that the accumulated clock error throughout the year does not exceed 10 minutes. In addition, the instrument will perform network timing every time it logs into the system, and there will be no significant deviation.
16) Data Protection
Data can be stored for a long time without being affected by external interference, low voltage, power failure, battery replacement, etc.

4. Advantages of the source manufacturer
1) Price discounts
2) Quality assurance, providing quality inspection assurance, and offering real case studies
3) Strength guarantee