With the continuous development and maturity of sensors, wireless data transmission equipment and application solutions, it is also promoting the development of industrial applications, smart home,  China Lora Wireless Modules Manufacturers smart sec urity, smart transportation, smart environmental protection, smart agriculture and other industries; The incident of enterprises banning Xinjiang cotton in my country is said to be the inhumane process of cotton picking in Xinjiang. The spokesperson of the Ministry of Foreign Affairs has made it very clear about the political factors involved; my country has also responded quickly, with celebrities canceling contracts one after another, and various applications The market has removed the APPs of many companies, etc.;

We only look at the development of technology. In fact, Xinjiang's cotton economy has developed very well. Whether it is in terms of cotton quality or industrialization level, it has reached a high level; as an Internet of Things practitioner It is necessary to think about what can we do?

First of all, let's analyze a wave. Xinjiang has a large land and abundant resources, which is very suitable for mechanized operations. As a large-scale planting product, cotton cannot be cultivated in greenhouses. Also because the land is large, the distance is long, and there is no obstruction in the middle, the operator's signal It is also relatively weak here; we can use high-power radio stations to collect and judge cotton information, so as to arrange operations more reasonably and effectively;

Next, we use Ebyte's E90-DTU (400SL44) 25W LoRa radio station to realize the application of farm data transmission in Xinjiang, which is rich in land and resources, because its power is large enough and the transmission is far enough, it is especially suitable for this kind of open place;

To realize the intelligence of such a large farm, we can use temperature sensors, humidity sensors, plant status sensors, etc. to monitor the temperature of the cotton field and the state of the cotton itself; and then transmit the data to radio station A and radio station A through the RS485/RS232 interface Then the data is transmitted to the radio station B dozens of kilometers away through a new generation of LORA technology; then the radio station B outputs the collected data through RS485/RS232; if the distance is too far, it can also be relayed in the middle; The purpose of remotely monitoring cotton soil, air, and other cotton environmental indexes and the state of cotton itself;

Xinjiang cotton has many natural advantages and is not suitable for some completely intelligent solutions, so different environments and different applications need to be selected according to the actual situation.

Long transmission distance: E90-DTU (400SL44) products use a new generation of LoRa spread spectrum technology and power up to 25W, and the transmission distance can reach more than 40KM

Data is more stable: Based on the new LoRa spread spectrum technology, not only the transmission distance is greatly increased, but the anti-interference ability is more than doubled, ensuring the stability of the data.

A new generation of LoRa spread spectrum technology

Lower power consumption: E90-DTU (400SL44) LoRa radio station has industrial-grade multiple hardware and software protection; it has the advantages of ultra-high heat dissipation efficiency, shielding noise interference, good electromagnetic compatibility, and strong anti-interference ability;

E90-DTU

Case advantage

Low cost: low cost to achieve remote monitoring;

Simple and convenient networking: Only a simple networking is needed to realize the application, and the networking is more flexible;

Strong protection ability: impact resistance, dustproof, moisture-proof, anti-interference;

Customizable: According to the actual needs of customers, specific functions can be customized and developed;

Ebyte has many products and solutions suitable for smart agriculture. LoRa products are not only limited to E90-DTU (400SL44) products, but also E22, E32 and other series products; in addition to LoRa radio frequency, there are also small radio frequency, sub-G, WiFi, Bluetooth, ZigBee, 4G, NB-IoT and other technology product series help the development  China Lora Wireless Modules of industrial applications, smart home, smart security, smart transportation, smart environmental protection, smart agriculture and other industries. Ebyte people are committed to helping the development of IoT, intelligence and automation more powerfully every day, and improving resource utilization.

Posted by: flatdirectionalantenna at 06:58 AM | No Comments | Add Comment
Post contains 702 words, total size 5 kb.

When the ranging signal is transmitted and modulated by digital and analog signals, a certain delay (or distance) error is generated by the transmission and reception of the radio. Usually,4G/Cat-1/NB DTU this delay can be considered to be inevitable, which means that some compensation is needed for this delay in the calculation.

Another similar source of measurement error is the antenna delay, which is delayed by the signal transmitted by the antenna (or the received signal). Moreover, this delay may not be uniform because the delay produced in one direction of radiation may be different from the other.

Multipath refers to the phenomenon that the transmitted signal is reflected and diffracted multiple times from the transmitter to the receiver. This effect can become severe when there is an obstacle between the transmitter and the receiver.

In summary, based on the division of various error sources, we can conclude that there are two sources of error:

1. Fixed deviations caused by various specific delays, we need to give specific compensation

2. The deviation caused by an unknown variable, the master and the slave must be corrected according to the actual situation.

The above mainly describes the principle of ranging and matters needing attention. The following describes the positioning and positioning applications of some E28 modules:

The E28 module ranging positioning does not need to involve GPS positioning technology, which can achieve the minimum size, the lowest power consumption, and the lowest cost. Can be applied to various industries and fields, such as warehouse logistics, animal husbandry, construction industry and so on.

Posted by: flatdirectionalantenna at 09:12 AM | No Comments | Add Comment
Post contains 268 words, total size 2 kb.