With the development of the economy, the application environment of electric power transmission lines is becoming increasingly variable and complex, with greater differences in climatic conditions. In the frigid winter, moisture in the air often forms rain icicles, leading to ice accumulation on transmission lines. In some special geographical environments, the situation of ice accumulation can be even more severe, often having a significant impact on the normal operation of transmission lines, potentially damaging them and causing substantial economic losses. Generally, the areas affected by ice accumulation on transmission lines are mostly located in remote mountainous areas such as hills, high mountain watersheds, and canyons, which poses great difficulties and obstacles for power line patrol personnel, as relying solely on manpower cannot timely detect and prevent ice accumulation disasters.
To ensure the normal operation of transmission lines, ice monitoring products have emerged. Traditional ice monitoring devices use tension sensors for transmission conductors, suspending the conductors between two spans with tension sensors. This not only complicates the installation process, requiring power outages that affect transmission efficiency, but also leads to significant measurement errors due to large spans, making the measured data unsuitable for direct use as detection results. Additionally, transmission lines are greatly affected by external environmental factors such as wind speed and direction, and existing products have a relatively singular method for measuring ice thickness, making them prone to errors caused by unknown environmental conditions or inaccurate judgments of the actual ice situation. Therefore, designing an easy-to-install and accurately measuring ice monitoring product is an urgent problem that needs to be solved in existing technology.
This article introduces a visual mobile ice online monitoring device and system addressing the technical issues in existing technology. The visual mobile ice online monitoring device includes a control unit, an ice detection device, and a power supply unit. The ice detection device features a detection bracket with two installation terminals, tension sensors installed at each terminal, an analog conductive wire installed between the two tension sensors, and an image collector for capturing images of the analog conductive wire; the analog conductive wire is equipped with a heating component; the control unit is electrically connected to the image collector, tension sensors, and heating component to control their operational states; the power supply unit is electrically connected to the control unit, image collector, tension sensors, and heating component.
The visual mobile ice online monitoring device also includes a wireless communication device, which is electrically connected to the control unit and power supply unit. The wireless communication device consists of a wireless communication chip and a wireless communication antenna, where the wireless communication chip is electrically connected to the control unit, and the wireless communication antenna is electrically connected to the wireless communication chip. The ice detection device also includes a meteorological monitor for monitoring surrounding meteorological parameters, which is electrically connected to the control unit. The meteorological monitor is an ultrasonic micro-meteorological sensor. The ice detection device further includes a de-fogging and de-icing component that is electrically connected to the control unit and installed at the front end of the image collector. The power supply unit includes a battery and a power supply circuit, with the battery supplying power to the control unit, image collector, tension sensors, and heating component through the power supply circuit. The power supply unit also includes a solar panel that converts solar energy into electrical energy, which is electrically connected to the battery.
If security encryption features are needed, the NRSEC3000 security chip must be installed. The NRSEC3000 security chip is a type of communication security chip that uses a 32-bit embedded RISC architecture CPU. It features low power consumption, high performance, and high code density, with independent memory protection units (MPU) and memory encryption units (MEU), as well as a rich set of internal coprocessors and external interfaces. It can serve as a supporting chip for the mainboard of terminal devices, providing encryption and decryption capabilities for terminal communication signaling.
The chip internally implements dedicated encryption modules for the SM2 and SM1 algorithms required for national commercial password products, as well as DES/3DES encryption modules and RSA public key algorithm engines. Additionally, the chip provides a 32-bit hardware encryption processor that can be used for public key algorithms, hash algorithms, and symmetric algorithms such as AES/DES. The chip is embedded with a 32-bit true random number generator (TRNG) to meet the cryptographic application requirements of COS developers, saving software overhead and improving software implementation efficiency.
NRSEC3000 Product Features
1. The chip has a rich set of external interfaces, including: 7816 (smart card interface, a type of serial port, half-duplex) master/slave transceiver, which can implement t=0 and t=1 protocols, supporting multiple communication speeds; hardware SPI (a type of serial port, full-duplex) master/slave module.
2. The chip provides enhanced security features. By configuring the memory management unit (MMU), it completes the setting of working modes and related permissions, enabling hardware-guaranteed security for multiple applications on a single card. Furthermore, the chip includes security mechanisms such as voltage and frequency detection, program and data encryption storage mechanisms, and code protection mechanisms to combat physical attacks and chip probing.
3. The chip is high-performance, low-power, and features a rich set of internal coprocessors and external interfaces.
Product Performance
SM2 Signature: 2.34s/time
SM1 Encryption/Decryption: 3.38mb/s
SM2 Key Generation: 1.62s/time
SM2 Signature Verification: 4.68s/time
SM2 Public Key Operation: 4.67s/time
SM2 Private Key Operation: 1.63s/time
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