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The difference between power DTU and ordinary DTU
The power industry is one of the pillar industries in the national economic system. The application of DTU in the power industry has gradually matured. From the initial grid monitoring, it has gradually spread rs232 to ethernet adapter to all directions. In the power industry, DTUs dedicated to power are generally used.
The difference between power DTU and ordinary DTU
1. Working temperature
Power DTUs generally adopt wide temperature and wide voltage, industrial-grade design, and the working temperature is generally between -40-85°C to adapt to the harsh temperature test in winter and summer in the wild. The working temperature of ordinary DTU generally cannot meet the requirements of industrial grade, and it is mostly in the range of -20-75°C.
2. EMC protection
EMC protection is the electromagnetic radiation protection of electromagnetic compatibility. The high voltage of tens of thousands of volts in the power grid environment will produce very strong electromagnetic radiation interference. Power DTU has made a very strong protection against this environment. Radiation anti-interference, power frequency magnetic field anti-interference, and shock wave anti-interference can all reach level three or above.
3. Interface installation method
In order to adapt to the power grid environment, the power DTU is generally installed with full wiring terminals. Its RS232/485 serial port and power supply are integrated and installed as terminals, which further improves the anti-interference ability. Ordinary DTUs will not be installed in this way because they do not have a strong electromagnetic environment.
4. Transmission protocol
In addition to electromagnetic environmental factors, the power industry is also subject to special transmission protocols. 101 and 104 transmission protocols are widely used in data transmission in the electric power industry. Compared with ordinary DTU, power DTU will support these two transmission protocols.
5, power supply, 485, etc.
Generally speaking, in terms of power supply protection, the power DTU has an electrostatic protection level of four, EFT level and power conduction immunity up to three; 485’s anti-static level can reach four, and surge level three. It can be seen that the protection of the power DTU is specially strengthened.
Power DTU Features
Embedded design, small size, ultra-low power consumption, in line with the structural requirements of power distribution network automation equipment.
Wireless high-speed transmission, big data transmission is faster and smoother; supports overseas operator networks, more choices and more convenient.
Support power IEC101/IEC104 protocol transmission to meet the needs of each power master station and automation terminal.
Pass many harsh tests such as insulation test, surge interference, electrostatic discharge interference, radio frequency radiation electromagnetic field, power frequency radiation magnetic field, high and low temperature, etc.
Multiple detection mechanisms, self-repairing of operating faults, ensuring that the device is permanently online, ethernet to rs485 converter suitable for unattended environments; disconnected reconnection, data reissue, stable and reliable transmission without packet loss.
Embedded with various protocols such as PPP, TCP/IP, UDP/IP, MODBUS-TCP, MODBUS-RTU, etc., compatible with the manufacturer's private protocol.
Support the operator's private network access and specify IP to meet financial-level data security standards, and then encrypt transmission on the basis of the private network to ensure security and accuracy.
Power DTU is a power-level embedded wireless data terminal, which can help users quickly access high-speed Internet and realize safe and reliable data transmission.
PR
Video surveillance products and technologies put forward higher requiremen
ts:
1. High-definition technology to see farther
At present, high-definition images have been widely used in traffic and other industries that require high video quality. Pollution source monitoring involves the monitoring of small objects such as gases, particles, and suspended solids, and there is also a demand for high-definition images.modbus tcp gateway In addition to high-pixel high-definition, high-definition laser and thermal imaging cameras that can see several kilometers, tens of kilometers or even farther have more demands for use in water and air pollution monitoring.
2. More transparent fog penetration technology
Current video surveillance fog penetration technologies mainly fall into two categories, namely electronic fog penetration and optical fog penetration. The thermal imaging temperature detection sensitivity of the Hepu three-band laser thermal imaging camera can reach up to 35mk, which has higher sensitivity than conventional products, can obtain more delicate picture quality, and is less affected by fog, rain and snow. It has the function of visible light through fog, daytime optical filtering and DSP image processing, which can enhance the image details in the environment of mist, water vapor and dust.
3. More targeted video intelligent analysis
Video intelligent analysis technology is an important technology for video surveillance to change from passive to active. Among them, behavior analysis, face recognition, license plate recognition and other technologies have been widely used in public security, transportation and other industries.
In the monitoring of pollution sources, behavior analysis such as regional intrusion of sewage outlets and sewage detection sampling points can effectively identify human fraud and other behaviors. At the same time, there are many industrial intelligent analysis needs:
(1) Smoke body color recognition: analyze and identify the color of smoke body;
(2) Blackness analysis of smoke body: judge the blackness information of smoke body;
(3) Water body color analysis: identify the color of the water body;
(4) Analysis of floating objects in the water body: determine the number and density of floating objects in the water body;
(5) Smart meter reading: recognize and read the data of environmental meters through video.
4. Requirements for wireless transmission
Pollution sources are mostly scattered and remote, and power supply and wired transmission are very difficult. serial rs485 to ethernet converter At present, many sensors need to support wireless transmission through 4G industrial-grade wireless routers, and because their power consumption is very low, usually a battery or solar power can support data collection for several years.
5. Requirements for corrosion resistance and self-cleaning
The source of pollution is often in an environment with a lot of water vapor, smoke and dust, and a lot of corrosion. It is necessary to focus on the dustproof, waterproof, and anti-corrosion protection of monitoring equipment. At the same time, it is necessary for the monitoring equipment to have self-cleaning functions such as wipers, which can be controlled regularly or remotely to ensure the effectiveness of the screen. At the same time, higher requirements are placed on the front-end hardware equipment.
What benefits does the Internet of Things bring to smart environmental protection applications
Smart environmental protection is an extension of the Internet of Things technology, which puts more emphasis on the application of perception layer technology and intelligence layer technology to realize a real-time and automatic environmental data perception system, and collect and monitor environmental pollution source data and atmospheric environment quality data in real time. industrial iot gateway It can intelligently analyze a large amount of environmental protection monitoring data through powerful computing power, and promote the intelligence and automation of environmental protection work.
The overall structure of "Smart Environmental Protection" is divided into four layers: perception layer, transmission layer, intelligence layer and service layer.
Perception layer: Use any equipment, system or process that can sense, measure, capture and transmit information anytime and anywhere to achieve a "more thorough perception" of environmental factors such as environmental quality, pollution sources, ecology, and radiation;
Transport layer: use environmental protection private network, combined with 4G network, satellite communication and other technologies, to interact and share the environmental information stored in personal electronic devices, organizations and government information systems, to achieve "more comprehensive interconnection";
Intelligence layer: Integrate and analyze massive cross-regional and cross-industry environmental information by means of cloud computing, virtualization, and high-performance computing to realize massive storage, real-time processing, deep mining, and model analysis, and realize "deeper intelligence change";
Service layer: use the cloud service model to establish an object-oriented business application system and information service portal to provide "smarter decision-making" for environmental quality, pollution prevention, ecological protection, radiation management and other businesses.
Specifically, modbus tcp gateway it mainly involves two parts: the front end of the data acquisition hardware and the software system of the background data center. The data acquisition hardware is responsible for collecting on-site environmental data. The environmental data that can be collected include air temperature and humidity, soil temperature and humidity, CO2 concentration, light intensity, ethernet to rs485 converter For water temperature, ammonia nitrogen in water, dissolved oxygen concentration and pH value, etc., the data center summarizes, analyzes, displays and alarms the data through the intelligent analysis software system. When the environmental data exceeds the threshold set by the system, the system will generate an alarm, through sound and light alarm Notify the relevant personnel in the form of devices, mobile phone text messages and pop-up windows, and at the same time start or close the relevant equipment to adjust the on-site environmental indicators. Here 4G wireless transmission plays an important role, generally industrial-grade wireless routers are used as the transmission pipeline at both ends. Therefore, smart environmental protection has high requirements for front-end signal acquisition equipment.
Matter は Zigbee プロトコルを置き換えることができますか?
ZigBee は 20 年近く存在しており、すでに技術的に非常に成熟しており、Bluetooth ワイヤレス技術と WIFI ワイヤレス技術を使用した近距離ワイヤレス通信の分野では、世界の 3 分の 1 を占めています。しかし、近距離通信プロトコルの新星が続々と登場し、ZigBee 廃止の噂も絶え間なく広がっています。では、ZigBee を排除することは可能でしょうか?
「Matter プロトコル」の由来については以前に触れましたが、Matter プロトコルは ZigBee プロトコルの ZCL から派生したものであり、Matter 標準プロトコルもプラットフォームとして ZigBee アライアンスを持っています。答えはノーだ
まず第一に、Matter プロトコル規格は WIFI 通信技術と低電力デバイス間の接続を開くように見えますが、Matter には IEEE802.15.4 標準プロトコルと IEEE802.11 標準プロトコル間のブリッジ デバイス、つまり「エッジ ゲートウェイ」なので、Matter 通信プロトコルは依然としてゲートウェイに依存する必要があります。
第 2 に、Matter デバイスがネットワークに接続されると、デバイス側でヒューマン コンピュータ インタラクションを実行する必要があるため、多くの Matter チップは、同じ IEEE802.15.4 への ZigBee および BLE デュアルモード チップ (E73 シリーズ ワイヤレス モジュール) です。プロトコル モードを ZigBee 標準プロトコルとして使用します。
また、MatterはIPv6をベースとしているため、無線モジュールチップのプロトコルスタックのリソース消費量はZigBee技術に比べてはるかに大きく、チップ数でコストを削減できる反面、ソフトウェア開発費やソフトウェア保守費が大幅に削減されます。 MatterワイヤレスモジュールもZigBeeモジュールよりも高くなっています。
Matter は Zigbee プロトコルを置き換えることができますか?
実際、Matter ワイヤレス技術は ZigBee 技術に取って代わるものではなく、ZigBee プロトコルを補完するものです。現在、Matter はバージョン 1.0 しかリリースしていませんが、これは ZigBee 3.0 よりも成熟度と信頼性がはるかに劣っています。また、Matter は将来的に ZigBee と下位互換性を持つ予定です.Matter は ZigBee と同じ IEEE802.15.4 プロトコルを使用し、Matter も ZCL から派生しているため、ZigBee と Matter の間のブリッジ デバイスが将来的に登場する可能性があります.
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Test kits
Wireless modem
LoRa wirelss modem
Zigbee テクノロジーモジュールの保守性
ZigBee のように、低消費電力をサポートする IoT プロトコルは無数にあります。しかし、どの IoT 通信プロトコルでも、低消費電力の下限は、チップ プロセスと RF 消費電力という 2 つの制約から逃れることはできません。したがって、一部の新しい IoT プロトコルのチップ プロセスは、一部の古い ZigBee チップ プロセスよりも技術的に劣っています。 ZigBee の低消費電力の利点は明らかではないようです。しかし、ZigBeeチップの技術も向上しています。 TI のチップを例にとると、従来の CC2530 の CPU 動作モーターは 8mA で、RX 電流は 20mA ですが、最新の CC2651 の 2 つの電流はそれぞれわずか 3mA と 6.4mA です。
RF 消費電力は、IoT チップの主要な消費電力です。ただし、ZigBee の低電力デバイスがメッセージを送信するだけでメッセージを受信しない場合、ZigBee の物理的な接続はより自由であり、常時接続を維持する必要がないため、消費電力を低く抑えることができます。継続的なハンドシェイク信号がなくても、デバイスは切断されません。開いた。したがって、ZigBee 低電力デバイスを設計する場合、必要な場合にのみ通信し、限られたすべての電力リソースを最先端に費やすことができます。
ZigBee アドホック ネットワークは静的な常時接続方式です。デバイスがネットワークに組み込まれると、簡単には切断されません。デバイスの電源を切っても、次に電源を入れたときにネットワークに接続されているため、リセットする必要はありません。ネットワーク化されたデバイスがネットワーク ステータスを変更する必要がある場合は、ネットワークの終了操作を実行するか、強制的に工場出荷時設定にリセットする必要があり、前者の動作はゲートウェイによって記録されます。
さらに、ZigBee はメッシュ ネットワークであり、デバイスはゲートウェイをバイパスして相互に直接通信できます。たとえば、ZigBee リモコンはカーテンを直接制御し、ZigBee スイッチは照明を直接制御しますが、ゲートウェイを介して転送する必要はなく、この接続関係も常に維持できます。したがって、ZigBee 無線通信技術は、コンピューター室の温度制御システム、小中学校のスマート教室システム、工場組み立てのインテリジェント管理機器など、誰も勤務していない場所やスマートフォンの使用が禁止されている場所に非常に適しています。行。
ZigBee ネットワークの安定性のために、ZigBee ゲートウェイの設計も複雑です。理論的には、コーディネーターは ZigBee ネットワーク全体のさまざまな機能を検出できるため、設計においてゲートウェイをより広範かつ包括的に考慮する必要があります。ゲートウェイが受信したすべてのメッセージは有用であり、ゲートウェイの設計が不安定なベンダーの多くは、ゲートウェイが受信したすべてのメッセージを処理しないことが原因です。
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GPS Module
CAN Module