Introduction to IOT Wireless Grain Silo Temperature Monitoring System

Wireless grain silo temperature monitoring system is a new generation of grain silo temperature measurement and control system with complete independent intellectual property rights based on low-power wireless radio frequency module using the wireless sensor network (Internet of Things) technology, which is regarded as one of the top ten most influential world-changing technologies in the 21st century.

As an important part of the multi-parameter grain monitoring system, the grain silo wireless temperature sensor system, without the need for on-site professional installation, without the need to provide door-to-door service, is not easy to damage, greatly reduces the cost, and greatly facilitates the use of the user. It completely abandoned the traditional criss-crossed wired network, not only to fundamentally solve the problem due to the cable coverage, vulnerable to lightning impact damage, more difficult to seal the contacts, vulnerable to fumigation and corrosion, resulting in frequent failures after the fumigation, the entire system is expensive, difficult to install and debugging in the grain rotation inverted warehouses, the line is vulnerable to mechanical damage, and the GPRS gateway can be accessed to the moisture, food pests, phosphine concentration, etc. Other grain data. GPRS gateway can also access moisture, grain pests, phosphine concentration and other grain data.

Wireless grain bin temperature monitoring system, consisting of 4G gateway, wireless digital temperature measurement cable (with battery), etc., combined with wireless air temperature and humidity sensors (already completed), and wireless grain temperature and moisture sensors, wireless grain pest sensors, wireless phosphine gas sensors, wireless oxygen sensors, wireless carbon dioxide sensors, wireless grain height sensors, and wireless switch controllers in the planning, can constitute a complete wireless grain monitoring system. All parts of the system are powered by two ordinary 3.3 volt 2300maH batteries, which can guarantee 3 years of normal service life under the condition of 15-minute interval of uploading temperature data at regular intervals and 10-second response time. Outside the warehouse equipment can also use solar power supply, life expectancy of more than 10 years.

The response time is adjustable at 10-second intervals. However, the shorter the interval the more power the product consumes. The advantage of a short response time is that when the user temporarily needs to read data from a temperature sensor, the temperature data can be read within the set response time.

salient features

• Completely wireless grain condition measurement and control system, no need to connect power supply and communication cable.
  • On-site installation is simple, the construction only need to place the corresponding equipment to the designated location can be, not to the grain storage building facilities such as digging trenches, trenching, drilling and other construction, while saving the cost of cables and burying, threading, racking, and other construction costs, can save 90% more than the cost of installation and commissioning.
• In addition to the computer system, all parts of the system can be powered by ordinary 1.5V dry batteries, and the equipment outside the warehouse can also be powered by solar energy.
  • The operation of the system is not affected by power outages in the depot, and if the computer system uses a portable laptop, it can be used normally anywhere in the depot.
• Completely solve the problem of lightning damage and mechanical damage
  • The traditional wired way due to the equipment connected to each other, cable coverage, easy to be damaged by lightning impact, while the grain in and out of the warehouse during the period is also vulnerable to mechanical damage, resulting in frequent failures, Shidian Grain Condition Measurement and Control System due to the lack of cable connection, so completely solved these problems.
• Timely system repair without the need for after-sales service from the equipment manufacturer
  • Because there is no connection between the equipment, so even if a piece of equipment is damaged only the user with spare parts to do a simple replacement, damaged equipment and the manufacturer to exchange.

system block diagram

Installation steps for temperature measuring cables

1. Set of products
   • The temperature measurement cable consists of two parts:
     • The temperature sensor cable section, which consists of multiple temperature sensors (DS18B20), connecting cables, reinforcement and sheath.
     • Electronic components section, including MCU and lora communication modules, housing, etc.
   • After the temperature measurement cable passes the factory inspection, the whole cable will be packaged and sent to the user.
   • If a temperature sensor or electronic component sends a fault, the entire temperature measuring cable will be replaced, so it is important to maximize the reliability of the product.
2. On-site installation
   • The temperature measuring cable is evenly distributed by the user to each part of the silo according to the specific location and shape of the silo. When the temperature measurement cable is installed on site, the temperature measurement cable is taken at will, with no specified numbering or sequencing requirements. After the temperature measurement cable is inserted into place, the management personnel will issue inspection orders through the center node, and through the human-computer interaction function of the product, observe and record the installation part of each temperature measurement cable, and mark the corresponding position on the interface of the background management platform. When the system is running, the temperature at a certain point can be understood.

Wireless Temperature and Humidity Sensor Introduction

Wireless temperature and humidity sensor, can be very convenient to the measurement point of the temperature and humidity value through wireless transmission, received by the GPRS gateway transmission to the host computer, you can set up a temperature and humidity monitoring system, without wiring, construction is simple.

⦾ Technical indicators:

1. Temperature measurement range: -10°C - +60°C
2. Temperature measurement accuracy: ±0.5℃ (-10℃ - +60℃)
3. Humidity measurement range: 1% - 99% (non-condensing)
4. Humidity Measurement Error: ±3%RH (25℃ Normal Humidity 30%-70%)
5. Wireless transmission rate: 9600 BPS (fixed)
6. Micropower emission, maximum emission power 20dbm
7. ISM band, no need to apply for a frequency point
   • Carrier frequency 433MHz
8. High immunity to interference and low bit error rate
   • The lora-based modulation with efficient forward error correction channel coding technique improves the ability of data to resist bursty and random interference with strong bypass performance.
9. Long transmission distance
   • Line-of-sight (open field) antenna placement >2 meters, reliable transmission distance >1.5km (9600 BPS)
10. Sampling interval: 60S (can be set according to customer requirements)
11. Supply voltage: Battery
12. Battery life: 2600maH battery, 60S sampling once available for more than 3 years
13. Overall dimensions: 100 X 80 X 30 (mm)

Hainan Shidian

Hainan Shidian Technology Co., Ltd. to "make the standardization of industrial Internet of Things easier" as the vision, focusing on the direction of the Internet of Things industry chain, indoor positioning, sensing and control and data transmission products in the field of continuous research and development, Lego (Lego) production, precise to meet the small amount of industrial Internet of Things products and a variety of demand characteristics, to provide customer Complex environment and personalized needs to meet the real low inventory, high satisfaction of the new supply and demand relationship.

The company has four R&D centers in Shanghai, Suzhou, Chengdu and Taipei, adhering to the group's nearly 40 years of good business resources and reputation, firmly believe in the "be an expert in the industry" business philosophy, precise in the channel, sensitive to the market, focus on products, "research" is reliable, "production" is stable, "sales" is quality, always focusing on the industrial Internet of Things customers personalized scenarios to meet the ultimate needs. We believe in the business philosophy of "being an expert in the industry", we are precise in channels, sensitive to the market, and focus on products, "research" is reliable, "production" is stable, "sales" is quality, and we are always focusing on the ultimate satisfaction of personalized scenarios of industrial IoT customers.

In terms of products, we have both Zigbee positioning products, which have been cultivated by our self-research team for more than 10 years, and UWB positioning products, which are developed by our teams in Shanghai and Taipei, to meet the different needs of customers for positioning accuracy. At the same time, the company also introduces Bluetooth positioning products to supplement the self-developed solutions, in order to fully meet the needs of all kinds of customers.

Software support we integrate the overall program of various industries, actively open interfaces and source codes for system integrators to join, for related system software companies to do case demonstration based on our products to provide convenience, so that the Internet of Things indoor positioning applications broader.