Water and electricity consumption monitoring for construction service projects in Hohhot Economic Development Zone Data acquisition case

1. Project Background and Requirements

The project is located in Hohhot, Inner Mongolia, and is a service project for the construction of the Hohhot Digital Economic Development Zone. It is a sub-project of the enterprise energy data collection and energy consumption monitoring sector.

With regard to the collection of water and electricity consumption data, combined with the constraints of objective factors on site, data collection is quite difficult. Most of the 485 interfaces of State Grid electricity meters are not allowed to be disassembled and wired due to seal restrictions. The collection of water consumption requires factory equipment and facilities to realize water consumption data collection without damaging the original pipelines. In view of the above difficulties in water and electricity consumption collection, we adapt corresponding products and provide implementation plans. Effective and real-time collection of energy consumption data provides convenience for enterprise energy consumption management.

2. Power Collection

1. 1 Applicable electric meters and data collection products

Adapt to the State Grid protocol (614/645 protocol, 698 protocol), and install and implement the infrared acquisition method.

SC-GP-IR4G wireless infrared meter reading terminal is a universal electric meter and gas meter reading terminal based on infrared communication, 4G wireless transmission, and DC wide voltage power supply launched by Shanghai Shucai Internet of Things Technology Co., Ltd. It can collect electric energy data, voltage, current, power factor and other electrical parameter data of State Grid electric meters (supporting 645 and 698 protocols).

Brief introduction to the principle of infrared meter reading: The infrared photoelectric probe reads the parameter information of the smart meter regularly through the infrared optical port and uploads it. The infrared meter reader has the function of infrared signal modulation and demodulation, modulates the binary digital signal into a pulse sequence with a frequency of 38KHz, and drives the infrared emitting diode to send it out in the form of infrared light pulses; the transceiver converts the received light pulse into an electrical signal, and then sends it to the demodulation circuit for demodulation after amplification, filtering and other processing, and restores it to a binary digital signal. After message parsing, it is sent to the server in a specified format (such as json).

The wireless infrared meter reading terminal supports the use of 4G communication, which greatly simplifies the on-site deployment time and reduces the construction cost. This terminal supports meter reading scenarios of various meters, gas meters and other instruments with infrared communication interfaces, and is suitable for electric energy meter data collection, smart city data collection, power monitoring data collection, energy conservation and emission reduction data monitoring system data collection, energy consumption monitoring system data collection, photovoltaic system data collection, intelligent monitoring data collection, robot data collection, smart security system data collection, cloud platform system data collection; electric energy meter calibration and inspection test bench; especially suitable for photovoltaic power generation system electric energy meter reading and power supply bureau state grid electric energy meter total meter lead seal is completely closed, and no seal can be opened.

1.2 Electricity Data Collection Implementation Process

Products include: adapter, 4G data acquisition terminal, infrared probe (with 3M glue), 4G suction cup antenna

1.2.1 Factors affecting the implementation of electricity meter data collection and installation

1) Whether the electric meter is of the State Grid protocol, whether it has an infrared communication port, and whether the infrared communication port is far infrared (if there is a near infrared communication port, it can be implemented, but the infrared probes used are different).

2）Signal impact: The environment where the meter is located, the underground distribution box (basement), the impact on the 4G signal (no signal, unable to transmit). For sealed iron boxes, the antenna needs to be extended and pulled out.

3）Power supply: 220VAC AC or 12VDC DC must be available on site.

4）The infrared probe should be installed close to the infrared communication port. If the meter cabinet cannot be opened, it can be installed through transparent glass. If there is no transparent glass and it cannot be installed close to the meter, the infrared communication collection method will not be implemented.

1.2.2 Infrared installation steps

Step 1: Check the photos of the electric energy meter to determine whether it has the far infrared communication function. If it has a far infrared communication window, it can be implemented . As shown in the following figure:

Electric meter infrared reading window

Step 2: Aim the infrared probe at the infrared window of the meter, with a distance of 0 to 5 meters, visible, and an angle less than 5 degrees, even through transparent glass. As shown in the figure below

One is to directly aim the infrared probe at the infrared window of the meter, which will provide better reception ( this is the recommended preferred installation method ) .

The infrared probe is directly attached to the electric meter (for example)

Another method is to stick it on the glass outside the infrared window of the meter when the meter cabinet door cannot be opened, as shown in the following figure:

Infrared probe attached to the outside of the glass (example)

3. Water Collection

3.1 Adaptive collection products

Adapt to pipeline water volume collection, no damage to the original pipeline, non-invasive installation and collection method, external clamp-on flow meter.

4G clamp-on ultrasonic flowmeter ( model DAQ-GP-UF4G ) is a universal ultrasonic flowmeter based on 4G wireless transmission and AC/DC wide voltage power supply launched by Shanghai Shucai IoT Technology Co., Ltd. It can collect instantaneous flow and instantaneous heat flow in the pipeline. Compared with traditional flowmeters, clamp-on ultrasonic flowmeters have the advantages of convenient and quick installation, no need to cut off the pipe to stop the flow, and truly realize lossless online installation.

The clamp-on ultrasonic flowmeter is equipped with a 4G data acquisition terminal , which can greatly simplify the on-site deployment time and reduce the construction cost. It is widely used in the heating industry, water supply, heat metering and charging, water treatment industry, fuel oil , light oil, chemical industry and other industries.

3.2 Product Features and Implementation Process

Acquisition characteristics : Measuring range: DN15~6000 (pipe diameter); Measuring medium: water, seawater, industrial sewage, acid and alkali solution, alcohol, beer, various oils and other single uniform liquids that can conduct ultrasonic waves; Accuracy: ±1%; Display: 2x20 character LCD display .

Electrical characteristics : Power supply: 9-36V DC power supply/220V AC power supply; Working power consumption: 1~2W;

IV. Implementation process and data upload

The wireless infrared meter reading and ultrasonic flow meter are equipped with 4G wireless data collection terminals, which upload data to the Inspur cloud platform in accordance with specific encryption and docking methods.

Corresponding electricity meter JSON data format (reference):

{

"Fflat": 0, //positive flat charge

"Fpeak": 28.91, //Forward peak power

...

"Rtotal": 0, // total reverse power

"Rvalley": 0, //Reverse valley level power

}

Corresponding water meter JSON data format (reference):

{

"flow": 11.1 , // Instantaneous flow rate , unit: m³/h

"fluidSpeed": 11.1 , // Fluid speed , unit: m/s