Dingjian Dan Beidou explosion-proof terminal provides a one-stop solution for refinery inspections, equipment inspections, and emergency command through high-precision positioning, multi-mode communication, intelligent IoT, and intrinsic safety design. The specific program content and advantages are as follows：

1. Core functions support the needs of three major scenarios

High-precision positioning and trajectory tracking

Centimeter level positioning: Combining Beidou-3 satellite navigation and UWB ultra-wideband technology, centimeter-level positioning can be achieved in closed spaces such as tank areas, pipe galleries, and reactors in refineries, and the trajectory can be traced to an accuracy of 30 centimeters.

Electronic fence warning: By setting a virtual safety boundary, it can automatically warn personnel who violate regulations and enter high-risk areas (such as storage tank areas and around reactors) to reduce the risk of accidents. After a petrochemical company applied it, illegal entry incidents were reduced by 80%, and safety accidents caused by inspection misoperations were reduced to zero.

Device location management: Supports external positioning modules to track the location of explosion-proof electric locomotives, inspection robots and other equipment in real time to avoid accidentally entering dangerous areas.

Multi-mode communication ensures full scene coverage

Seamless switching between ground and satellite: Supports 5G/4G, Wi-Fi 6, Bluetooth 5.3 and satellite communications. When the ground network is normal, it automatically switches to the cellular network to reduce communication costs. ； When the base station is damaged, it will automatically switch to satellite mode within 30 seconds to ensure the continuity of voice, SMS, and data transmission.

Anti-interference and stability: Digital signal processing (DSP) and frequency hopping technology are used to effectively resist problems such as electromagnetic interference and signal attenuation, ensuring stable communication in areas with complex electromagnetic environments such as refining and chemical plants.

Cluster scheduling and video backhaul: It supports 5G private network to ensure real-time backhaul of high-definition video and builds a holographic digital twin system. The command center can check the status of on-site equipment in real time, improving emergency command efficiency by more than 40%.

Intelligent IoT and predictive maintenance

Environmental safety monitoring: Built-in laser methane sensor, temperature and humidity sensor, and vibration monitoring module can collect equipment temperature, pressure, gas concentration and other parameters in real time, and realize fault prediction through AI algorithm. For example, in the catalytic cracking unit, the terminal analyzes the reactor temperature curve in real time. When the temperature deviates from the standard value ±2°C, an early warning is immediately triggered and a maintenance work order is generated, reducing unplanned downtime by 60%.

Leak detection and heat map generation: The laser methane sensor is used to quickly scan the leakage points of the pipeline network and generate a heat map to visually display the leakage range, providing key data support for emergency decision-making.

Edge computing and local decision-making: Supports real-time processing of data on the device side, reducing cloud transmission delays. During pipe gallery inspections, the terminal automatically associates pipeline files with historical inspection records through NFC/QR code scanning, combines AI algorithms to analyze corrosion trends, and warns of potential leakage risks 14 days in advance.

2. Intrinsically safe design eliminates safety hazards

Explosion-proof certification and material innovation

It has passed international explosion-proof certifications such as Ex ib IIC T4 Gb, ATEX, IECEx, etc. It uses low-voltage/low-current circuits, explosion-proof lithium batteries and triple redundant cooling systems to control the surface temperature of the equipment below 85°C. It can withstand 100% methane gas environment and avoid sparks or thermal effects from igniting explosive mixtures.

The housing is constructed from high-strength carbon fiber composite material capable of withstanding extreme temperatures ranging from -35°C to 70°C; it features an integrated multi-gas sensor array (methane, CO, H2S) offering ppm-level detection sensitivity and a response time of less than 3 seconds.

Paperless inspection and compliance management

Equipment positioning is achieved through NFC/QR code scanning, valve status and pressure parameters are automatically recorded, and the data is uploaded to the ERP/MES system in seconds, reducing the manual error rate by 85%.

Automatically record inspection time, location, and data to meet the safety supervision department's requirements for "double prevention" (risk classification management and control, hidden danger investigation and management), build a digital operation process, and achieve traceability of safety compliance.

3. Emergency command and rescue support

Real-time command and multi-department collaboration

Integrated thermal imaging camera and gas sensor to monitor fire sources and trapped persons’ locations in real time； When a flammable gas leak alarm is triggered, the encrypted voice channel is automatically switched, and the commander can remotely guide on-site personnel to put on positive pressure respirators and evacuate through video.

It supports the Beidou short message function and realizes two-way communication in areas without ground network coverage, ensuring full coverage of emergency instructions and avoiding information gaps.

Dingjian Dan Beidou explosion-proof terminal uses precise positioning, reliable communication, intelligent IoT and intrinsically safe design to build a full-process digital defense line of "inspection-monitoring-emergency" for refineries. It not only significantly improves operating efficiency and safety compliance, but also provides solid protection for human lives and equipment assets in extreme scenarios, becoming a key infrastructure for the intelligent transformation of the refining and chemical industry.

Dingjian focuses on the R&D, production and sales of three-proof communication products such as single Beidou handheld terminals, Beidou short message terminals, RTK high-precision positioning terminals, single Beidou explosion-proof intercom terminals, explosion-proof mobile phones, anti-confidential mobile phones, 5G single Beidou law enforcement recorders, satellite communication phones, etc. It supports customized Hongmeng systems, secondary development, and provides one-stop communication equipment application solutions.