---
title: "Foreign Object Detection"
industry: "Computer, Electronic and Optical Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:FOREIGN_OBJECT_DETECTION"
  data_integrity_hash: "efa227a9e42964dc46a61881df6516d6"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:FOREIGN_OBJECT_DETECTION"
  data_source_uri: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/foreign-object-detection.md"
  official_resource_url: "https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/foreign-object-detection"
  is_verified_logic: true
attributes:
  primary_spec:
    status: "config-dependent"
    typical_range: "0.1-100 m detection distance, 1-1000 mm object size, -20°C to 70°C ambient temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 3
    unit: "dB"
    consequence: "Rayleigh scattering limit at λ=905 nm, thermal noise floor at 300 K, Fresnel diffraction at aperture D=25 mm"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Laser diode junction temperature exceeding 85°C"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Thermal management with 0.5 K/W heatsink and PID-controlled TEC cooling"
  - node_2:
      trigger: "Ambient light intensity &gt; 100,000 lux at 550 nm wavelength"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Optical bandpass filter with 10 nm FWHM at 905 nm and automatic gain control circuit"
bom_nodes:
  detection-sensor-head-0:
    type: "part"
    urn: "URN:CNFX:ME:DETECTION_SENSOR_HEAD"
    interface_type: "physical-logic-coupled"
  signal-processor-control-unit-1:
    type: "part"
    urn: "URN:CNFX:ME:SIGNAL_PROCESSOR_CONTROL_UNIT"
    interface_type: "physical-logic-coupled"
  rejection-mechanism-2:
    type: "device"
    urn: "URN:CNFX:ME:REJECTION_MECHANISM"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 22000:2018 - FOOD SAFETY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/ASQ Z1.4-2008 - SAMPLING PROCEDURES AND TABLES FOR INSPECTION BY ATTRIBUTES"
    scope: "Verified Engineering Specification"
  - standard: "DIN EN 1672-2:2020 - FOOD PROCESSING MACHINERY - SAFETY AND HYGIENE REQUIREMENTS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/foreign-object-detection.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "954aef837ba5af230a7b5a8d121f5b3d59071b752fe9b3af6f7655fcbe5d9e39"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Foreign Object Detection

## 1. Technical Definition
A component that identifies and signals the presence of unwanted materials or objects within an industrial system's process flow.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.1-100 m detection distance, 1-1000 mm object size, -20°C to 70°C ambient temperature**. Failure boundary: **Signal-to-noise ratio &lt; 3 dB, detection latency &gt; 50 ms, spatial resolution &gt; 5 mm**, Mechanism: **Rayleigh scattering limit at λ=905 nm, thermal noise floor at 300 K, Fresnel diffraction at aperture D=25 mm**.

### 2.1 Analytical Physics Model
Governed by the **Rayleigh Resolution Criterion**:

> **Primary Equation**: $d = \frac{0.61 \lambda}{NA}$  
> **Engineering Impact**: Defines the theoretical limit of machine vision systems.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| \lambda | Wavelength | Engineering Constant |
| NA | Numerical Aperture | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Laser diode junction temperature exceeding 85°C | 8 | Optical power degradation below 10 mW at 905 nm wavelength | Thermal management with 0.5 K/W heatsink and PID-controlled TEC cooling |
| Ambient light intensity &gt; 100,000 lux at 550 nm wavelength | 8 | Photodetector saturation causing signal clipping at 5 V rail voltage | Optical bandpass filter with 10 nm FWHM at 905 nm and automatic gain control circuit |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| primary_spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Detection Sensor Head](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/detection-sensor-head.md) `(Standalone System)`
- [Signal Processor / Control Unit](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/signal-processor-control-unit.md) `(Standalone System)`
- [Rejection Mechanism](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/rejection-mechanism.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Industrial Conveyor System**, **Machine Vision Camera**, **Programmable Logic Controller**  
**Downstream Applications**: Printed Circuit Boards, Semiconductor Wafers, Optical Lenses  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What types of foreign objects can this detection system identify?
**A**: This system detects metallic contaminants, plastic fragments, dust particles, and other unwanted materials that could compromise product quality in computer and electronic manufacturing processes.

### Q: How does the rejection mechanism work when contaminants are detected?
**A**: Upon detection, the system triggers an automated rejection mechanism that removes contaminated materials from the process flow, preventing defective products from continuing through production.

### Q: What maintenance is required for the stainless steel housing and sensors?
**A**: The stainless steel housing requires minimal maintenance with periodic cleaning. Sensors need calibration checks every 6-12 months depending on usage intensity to maintain detection accuracy.

## 6. Manufacturing Compliance
- ISO 22000:2018 - FOOD SAFETY MANAGEMENT SYSTEMS
- ANSI/ASQ Z1.4-2008 - SAMPLING PROCEDURES AND TABLES FOR INSPECTION BY ATTRIBUTES
- DIN EN 1672-2:2020 - FOOD PROCESSING MACHINERY - SAFETY AND HYGIENE REQUIREMENTS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Foreign Object Detection](https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/foreign-object-detection)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: FOREIGN_OBJECT_DETECTION | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 80d5a688
