In industrial pipeline inspection, mechanical cavity endoscopy, and portable on-site inspection, imaging system selection often requires trade-offs between performance, cost, and reliability. When the inspection channel diameter is ≥7mm, the working distance is relatively fixed (e.g., 30-80mm), and long-term maintenance-free operation is required, a module based on a Fixed Focus Camera Module with a 7mm universal diameter and USB2.0 integrated interface becomes an engineering solution worth evaluating. This article provides a clear selection framework from five dimensions—physical size, optical characteristics, interface protocol, environmental adaptability, and typical applications—while incorporating key terms such as endoscope camera module, Fixed Focus Camera Module, usb2.0 endoscope camera, UVC Camera Module, 2MP Camera Module, and 1080P Camera Module to help you precisely match medium-bore fixed-distance inspection needs.
First step: Measure the minimum inner diameter of the target channel and assess probe passability.
The probe diameter is 7±0.10mm, a standard universal size among endoscope camera module products. The engineering value lies in:
Easily accessing industrial pipes, deep holes, engine blocks, gearboxes, and pump chambers with inner diameter ≥7.5mm, covering most medium-bore scenarios such as DN80+ pipes and common mechanical access ports.
The 7mm diameter is a “goldilocks size” in industrial endoscopy, compatible with a wide range of existing tooling, sealing adapters, and guide tubes, offering excellent interchangeability and spare parts commonality.
Compared to larger diameter probes (e.g., 8mm, 10mm), the 7mm retains more clearance, reducing the risk of jamming.
When selecting, verify: Is the minimum inner diameter ≥7.5mm? For bends, evaluate the probe’s rigid section length (typically 10-15mm) and cable bend radius. The fixed-focus design has no moving parts, making it suitable for repeated insertion and withdrawal in field use.
Second step: Confirm typical working distance and detail resolution requirements.
This module features a Fixed Focus Camera Module design, with focus factory-locked at the optimal working distance (typically corresponding to the 50-80mm range), requiring no on-site adjustment. Key advantages:
Maintenance-free: No motors or drive mechanisms, eliminating auto-focus failure modes, especially suitable for vibration environments (e.g., near engines, inside production line equipment).
Instant clarity: The image is clear as soon as power is applied, requiring no operator training or frequent calibration, significantly improving on-site inspection efficiency.
The sensor uses a 1/5-inch optical format with a pixel size of 1.75μm, achieving high pixel density within the 7mm diameter. While total pixel count is not specified, 1.75μm combined with 1/5-inch can reach VGA to 1MP levels, sufficient to clearly show common defects such as cracks, corrosion pits, and foreign objects.
For scenarios demanding higher resolution (e.g., precision mold dimensional measurement), upgraded versions with 2MP Camera Module or 1080P Camera Module are available; however, note that higher resolution often means smaller pixel size, which may compromise low-light performance. This module achieves a good balance between “sufficient” and “reliable.”
Third step: Evaluate the host platform and system integration complexity.
This module uses a USB2.0 interface integrating 3.3V power (VCC3.3V) and data transmission (D-, D+, GND), with built-in UVC Camera Module standard protocol, making it a typical usb2.0 endoscope camera. Key value:
Plug-and-play: No driver installation required; automatically recognized as a camera device by Windows, Linux, Android, etc.
Simplified wiring: Single cable simultaneously carries power and image transmission, reducing overall harness complexity and improving assembly efficiency.
Cross-platform compatibility: Direct connection to PCs, industrial computers, embedded boards (Raspberry Pi, Jetson), or portable tablets, facilitating development and field deployment.
When selecting, confirm: Does the target host’s USB port provide 3.3V power? (Some hosts only provide 5V, requiring a 3.3V LDO regulator.) The module integrates a DSP (size 22.18×6.25mm) and directly outputs standard UVC images without an additional processing board.
Fourth step: Assess on-site lighting conditions and the need for special protection.
The module comes standard with four 0402 white LEDs and reserved GPIO control pins, allowing independent on/off and brightness adjustment of the fill light. Engineering value:
Dark-field adaptation: In completely dark pipes or cavities, LED fill light ensures clear imaging.
Flexible control: GPIO allows dynamic brightness adjustment to suit highly reflective metals (lower brightness) or dark, light-absorbing materials (higher brightness).
Low power: Total power consumption of LEDs and DSP is controllable, suitable for battery-powered portable devices.
Regarding protection, the module’s steel shell does not specify an IP rating; it is intended for dry, clean environments by default. For use in humid, dusty, or temporary immersion conditions, an IP67 Waterproof version can be customized. The module is RoHS compliant.
|
Application Scenario |
Recommended Configuration |
Selection Rationale |
|---|---|---|
|
Industrial pipe (DN80+) inner wall corrosion/weld inspection |
7mm probe + long cable |
7mm universal diameter fits pipe interfaces; Fixed Focus eliminates focusing; USB2.0 direct to industrial PC |
|
Engine block/gearbox internal wear observation |
Steel shell protection + dimmable LED |
Fixed focus resists vibration; adjustable LED brightness adapts to different material reflectivity |
|
Portable handheld endoscope (facility/HVAC inspection) |
Standard USB cable + tablet OTG |
UVC Camera Module plug-and-play; 1.75μm pixels clearly show blockages |
|
Fixed-station production line quality spot check |
Fixed mount + external trigger |
Maintenance-free design reduces downtime; usb2.0 endoscope camera simplifies software integration |
|
Dark cavity inspection (fuel tanks, water tanks) |
High-brightness LED + oil-resistant sheath |
4 LEDs ensure dark-field imaging; optional IP67 protection resists oil |
The core value of the 7mm fixed-focus USB endoscope module lies in combining the maintenance-free high reliability of a Fixed Focus Camera Module, the plug-and-play convenience of a usb2.0 endoscope camera, the cross-platform compatibility of a UVC Camera Module, and the interchangeability of the 7mm universal diameter—providing a cost-effective, low-complexity vision solution for medium-bore industrial inspection, mechanical maintenance, and portable on-site inspection. When selecting, prioritize three questions:
Is the working distance relatively fixed? If the typical distance is in the 40-80mm range, the fixed-focus solution is most reliable; if distances vary widely, consider auto-focus or varifocal options.
Is higher resolution needed? For routine defect judgment, 1MP is sufficient; for micron-level detail, upgrade to 2MP Camera Module or 1080P Camera Module.
Is the environment humid or dusty? For dry scenes, the standard steel shell works; for wet or outdoor use, customize IP67 Waterproof.
As a manufacturer with over 30 years of optical imaging experience, SincereFirst not only supplies standard endoscope camera module products but also customizes cable length, LED brightness, and protection ratings according to your inspection scenario. We recommend obtaining engineering samples before mass production and conducting accessibility, image clarity, and UVC compatibility tests in real pipes or equipment to ensure your selection is both scientifically sound and forward-looking.
