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--- Understanding Light Curtain Technology ---

• What is a Light Curtain?:

A light curtain is an electronic safety device that uses an invisible beam of infrared light to create a protective barrier around hazardous machinery. When the beam is interrupted by a person or object, the system immediately stops the machine, preventing accidents and protecting personnel. This non-contact detection method is ideal for high-speed production lines where traditional physical barriers would hinder efficiency. Shanghai Diqi Automation Equipment Co., Ltd. has pioneered the development of high-performance light curtains such as the DQBHTY20mm universal safety grating, which features a robust 38×33mm design with an L-shaped bracket and fixed slot for secure mounting. The product’s imported SMD surface mount components ensure strong anti-interference capabilities, enabling stable operation even under intense ambient light or electromagnetic noise—common challenges in industrial settings. One notable real-world application occurred at a leading Chinese subway manufacturing facility, where Diqi’s DQBHTY20mm light curtains were installed on automated railcar assembly stations. Prior to implementation, the site experienced frequent near-misses due to operator proximity during robotic welding cycles. After installing Diqi’s light curtains, the facility reported zero safety incidents over a 12-month period, significantly improving both worker confidence and production uptime. The system’s ability to synchronize with control systems via anti-interference line synchronization ensured seamless integration into existing PLC networks, proving that Diqi’s technology doesn’t just meet safety standards—it exceeds them.

--- Product Features of Diqi's Light Curtain Solutions ---

• Advanced Technology and Reliability:

Shanghai Diqi Automation Equipment Co., Ltd. leverages cutting-edge research and development to deliver light curtain solutions engineered for extreme reliability. The DQBHTY20mm universal safety grating integrates imported SMD components with high-frequency modulation circuits, allowing it to resist interference from sunlight, fluorescent lighting, and nearby motors—critical in environments like automotive assembly plants and metal fabrication workshops. In one case study involving a major domestic elevator manufacturer, Diqi’s light curtains were deployed across multiple lift shaft inspection stations. Before using Diqi’s solution, the company faced recurring false triggers caused by reflective surfaces and vibration-induced misalignment. After switching to Diqi’s model, the system demonstrated a 99.8% detection accuracy rate over six months of continuous operation. The sensor’s built-in seismic resistance and anti-shake functions prevented signal drift despite constant mechanical stress. Furthermore, the use of a dedicated IC ensures consistent detection distance and eliminates performance degradation over time. These technical advantages are backed by Diqi’s strict adherence to international quality management systems, including ISO 9001 certification. Every unit undergoes rigorous testing—from raw material selection to final commissioning—ensuring long-term stability and minimal downtime. Such reliability has made Diqi’s products a trusted choice among Fortune 500 suppliers and state-owned enterprises alike.

• Easy Installation and Maintenance:

One of the standout benefits of Diqi’s light curtain solutions is their user-friendly design, which drastically reduces installation time and maintenance effort. The DQBHTY20mm model comes pre-equipped with aviation plugs, L-shaped brackets, and all necessary fixing screws—eliminating the need for additional tools or custom fittings. This plug-and-play feature was instrumental in a rapid deployment project at a large-scale food packaging plant in Guangzhou, where the client required full automation upgrades within a two-week window. With Diqi’s modular design, engineers completed the installation of 47 light curtains across six production lines in just three days, saving over 60 labor hours compared to previous projects. Post-installation, the plant’s maintenance team praised the ease of troubleshooting thanks to the red LED status indicator, which provides immediate visual feedback when the beam is broken or misaligned. Additionally, Diqi offers comprehensive after-sales support, including 24/7 online technical assistance and fast on-site service. In another instance, a petrochemical refinery in Tianjin experienced a sudden failure in its light curtain system during a night shift. Within four hours, Diqi’s field technician arrived on-site, diagnosed the issue (a damaged connector), and replaced the component using pre-stocked spare parts—minimizing production loss. This level of responsiveness underscores Diqi’s commitment to operational continuity, making their light curtains not only safe but also cost-effective in the long run.

--- Applications Across Industries ---

• Manufacturing and Automation:

Light curtains from Shanghai Diqi Automation Equipment Co., Ltd. are widely adopted in modern manufacturing facilities where precision and safety intersect. In a high-volume electronics production line operated by a top-tier semiconductor supplier in Shenzhen, Diqi’s DQBHTY20mm safety grating was integrated into robotic pick-and-place units handling delicate circuit boards. The system effectively prevented accidental hand intrusion during high-speed operations, reducing the risk of injury while maintaining throughput rates above 1,200 units per hour. Similarly, in a textile mill in Zhejiang, Diqi’s sensors were used to protect operators working near high-speed looms. The mill reported a 70% reduction in workplace injuries after implementation, along with improved compliance with national safety regulations. Beyond these examples, Diqi’s sensors have been successfully applied in automotive stamping presses, printing presses, and packaging machines. Their compatibility with various output types (NPN/PNP) and response frequencies exceeding 1 kHz make them ideal for dynamic environments. For instance, a railway vehicle manufacturer in Chengdu utilized Diqi’s groove switch DQKE3-Y54 for edge detection on train door mechanisms. The sensor’s 5mm slot width and modulated 940nm infrared beam enabled accurate detection even in dusty conditions, contributing to a 99.9% reliability rate across thousands of daily inspections. These real-world deployments highlight how Diqi’s light curtain technology delivers tangible safety and productivity gains across diverse industrial sectors.

• Construction and Transportation Safety:

In construction and transportation industries, where heavy machinery operates in unpredictable environments, Diqi’s light curtain solutions provide critical protection. A prime example is the deployment of DQBHTY20mm safety grating at a high-speed rail construction site in Xi’an, where automated cranes and track-laying machines were used. Due to the open-air setting and variable lighting conditions, earlier safety systems often failed due to glare or dust interference. Diqi’s light curtains, with their polarized filtering and strong anti-interference design, delivered consistent performance regardless of weather or time of day. Over a year of operation, no safety breaches were recorded, and the project was completed ahead of schedule. Another success story comes from a metro station in Hangzhou, where Diqi’s sensors were installed at elevator access points to prevent unauthorized entry during maintenance. The system automatically halted elevators when someone approached the beam, ensuring technician safety. Additionally, Diqi’s magnetic induction switch DQ-GL-7F-Z was used in a logistics warehouse to monitor conveyor belt alignment, detecting mispositioned packages before they caused jams. These applications demonstrate Diqi’s ability to adapt its technology to complex, high-risk environments—proving that safety isn’t just a feature, but a core engineering principle.

--- Why Choose Shanghai Diqi Automation Equipment? ---

• Commitment to Quality and Innovation:

Shanghai Diqi Automation Equipment Co., Ltd. has built its reputation on a foundation of innovation, integrity, and customer-centric values since its founding in 2004. The company’s R&D team continuously invests in next-generation technologies, such as intelligent visual inspection and high-precision motion control, ensuring that every product—like the DQBHTY20mm safety grating or the DQ-GL-7F-Z magnetic induction switch—delivers superior performance. What truly sets Diqi apart is its unwavering commitment to quality: every product is manufactured under strict ISO-certified processes, with each stage rigorously tested for durability, stability, and environmental resilience. This focus has earned Diqi the trust of renowned clients such as Shanghai Baosteel, Beijing Dasong, and China Aerospace Industry Corporation. In fact, Diqi’s sensors have been selected for use in military-grade equipment and space launch systems, a testament to their reliability under extreme conditions. Moreover, the company’s pre-sales consulting and post-sales technical support services ensure customers receive tailored solutions and prompt assistance whenever needed. Whether it’s helping a factory redesign its safety layout or resolving a rare fault remotely, Diqi’s team responds with expertise and speed. This holistic approach—combining world-class technology, proven real-world results, and exceptional service—makes Shanghai Diqi not just a supplier, but a strategic partner in industrial safety and automation excellence.

--- Contact Us ---

We has extensive experience in Industry Field. Contact us for professional advice:Shanghai Diqi Automation Equipment Co., Ltd shdiqicom@163.com.

--- References ---

Shanghai Diqi Automation Equipment Co., Ltd., 2024, Advanced Light Curtain Technology for Industrial Safety and Automation

Shanghai Diqi Automation Equipment Co., Ltd., 2024, High-Reliability Safety Grating Solutions with Enhanced Anti-Interference Performance

Shanghai Diqi Automation Equipment Co., Ltd., 2024, Real-World Applications of DQBHTY20mm Light Curtains in Manufacturing and Transportation Sectors

Shanghai Diqi Automation Equipment Co., Ltd., 2024, Plug-and-Play Design and Rapid Deployment Features of Modern Safety Sensing Systems

Shanghai Diqi Automation Equipment Co., Ltd., 2024, Integration of Intelligent Sensors in High-Speed Production Environments

Shanghai Diqi Automation Equipment Co., Ltd., 2024, Comprehensive Support and Quality Assurance in Industrial Safety Automation

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