Treating OCR as “one model” is a common misconception. Results depend on the whole pipeline: detect, rectify, recognize, structure. OCR is a pipeline, not a model Text detection: DBNet-class models find text lines; skew-correct perspective first; Recognition: quantized CRNN/SVTR on the NPU runs 20-50 ms per line; Structuring: template-based field extraction (invoice no., date, amount) […]
The cardinal sin of boot optimization is guessing. First attribute time to phases with tools, then attack the longest. Measure before optimizing Measure: systemd-analyze blame for userspace services, kernel printk timestamps for the kernel phase, bootchart for the whole picture; Usual wins: disable unused services and drivers, defer non-critical units, parallelize dependency chains, and move […]
Industrial failures are rarely about insufficient performance and usually about environmental fit. The order is environment, interfaces, supply, then performance. Environment first, parameters second Environmental fit: operating temperature, humidity, vibration, dust and EMI levels, plus whether conformal coating and fanless operation are required; Interfaces and protection: industrial sites demand isolated RS485/CAN, DI/DO and surge protection […]
Vendor-proprietary protocols make integration expensive. OPC UA offers a common information model and a secure channel, the lingua franca of cross-system integration. Why OPC UA Information modeling: don’t expose bare variables — build a device/unit/station object tree so MES understands data semantics; Security: use certificate mode, not anonymous, and rotate X.509 certificates on a schedule […]
Once a SoM is in production, every missing parameter becomes carrier-board rework. Confirm this list in writing. Move the questions to selection time Electrical and mechanical: connector type and stack height, board thickness, mounting holes, DDR capacity and bus width, operating temperature range; Interface resources: available PCIe lanes and generation, SATA/USB counts and speeds, Ethernet […]
The value of a data gateway is one box talking to every PLC on site, which demands broad protocol coverage and tag-list configuration. Multi-protocol is the bulk of the work Protocol coverage: S7, MC, FINS and Modbus TCP are the big four — build a compatibility matrix and test unit by unit; Tag lists: import […]
CNC panels live with oil mist, vibration and wide temperature swings. Industrial-grade parts and a fanless design are the first principles. Three trials beside the machine Temperature and cooling: -20 to 70C industrial parts in a fanless aluminum enclosure that conducts heat to the case; Vibration-proof storage: eMMC or industrial SSD — spinning disks die […]
The customer didn’t want to replace the line, only to add automatic inspection at key stations and reduce escape rates from manual checks. Retrofit, don’t rebuild Deployment: one edge box per station with an industrial camera, results driving a reject mechanism directly over IO; Algorithm: trained on historical defect images, with edge inference plus human […]
Benchmarks alone mislead. Performance per watt is the real cost metric for always-on hardware. How to compute efficiency Idle power: RK3576 units at 1.5-2 W vs RK3588 at 2.5-3.5 W — about 10-15 kWh more per year for 7×24; Loaded efficiency: under light load (
The key metrics are NAT throughput, concurrent connections and offload capability; clock speed is not the first priority. Routers are judged on forwarding, not benchmarks RK3528’s place: quad A53 with dual gigabit, low power and good cost for home and small business routing; RK3568’s edge: richer PCIe and USB3 for Wi-Fi 6 modules or multi-port […]