GA/T 995-2020 in English
VALIDTechnical specifications for video forensics devices for violations of road trffic satety
- Issued on:2020-07-28
- Implemented on:2020-12-01
- File Format:PDF
- Delivery:Via email within 5 business days
$534.00
本标准规定了道路交通安全违法行为视频取证设备的一般要求、技术要求、试验方法。
本标准适用于道路交通安全违法行为视频取证设备，其他视频设备的道路交通安全违法行为记录要素可参照执行。
Introduction
Background of Standard Revision and Technical Evolution
This standard replaces the 2012 version of GA/T 995. The main technical changes include: deleting the definition of standard definition/high definition video terms, adding 3 new terms such as panoramic features, strengthening the requirements for video processing units, adding 5 functions such as driver facial feature recording, and optimizing 12 types of test methods. It reflects the industry's technical upgrade path from single evidence collection to intelligent analysis + multi-source data fusion.
Technical requirements for core equipment
| Indicator category | Fixed equipment | Mobile equipment |
|---|---|---|
| Horizontal resolution | ≥1000 TVL | ≥800 TVL |
| Minimum illumination | ≤0.01Lux(F1.2) | ≤0.1Lux(F1.2) |
| Video storage | ≥300 violation records + 720h monitoring | ≥100 violation records + 8h monitoring |
Application case: After a city traffic police detachment deployed a fixed video evidence collection device that complies with this standard, the daytime capture rate of motor vehicles failing to yield to pedestrians increased from 82% to 93%, and the MTBF (mean time between failures) of the device reached 5,000 hours.
Key function implementation points
1. Violation evidence collection function
It is necessary to ensure that the video record contains: more than 5 seconds of illegal behavior process, panoramic features (including license plates/line markings), and illegal behavior features. Capture rate requirements for fixed equipment:
- Daytime ≥90% | Nighttime ≥80%
- Special scenarios (such as horn evidence collection) must include 3 seconds of audio
2. Vehicle feature recognition
Improve accuracy through dual-mode verification:
- Static image recognition: license plate resolution 100-160 pixels
- Real vehicle dynamic test: speed coverage 20-100km/h
Electromagnetic compatibility and environmental adaptability
| Test type | Vehicle equipment requirements | Test parameters |
|---|---|---|
| Electrostatic discharge | Contact discharge 8kV | GB/T 19951 |
| Temperature range | -40℃~85℃ | GB/T 2423.22 |
| Vibration test | 5-200Hz random vibration | GB/T 2423.56 |
Implementation suggestions
1. Selection and configuration: For urban expressways, fixed equipment that supports multi-stream recording and traffic statistics should be selected first, and the vehicle-mounted equipment must meet the IP66 protection level.
2. Test verification: It is recommended to conduct a 2000+ sample stress test through the illegal scenario library in Appendix B to ensure that the license plate recognition accuracy rate is ≥98%.
3. Operation and maintenance management: Use the status monitoring function in clause 4.6.5 of the standard, set a 300-second status synchronization cycle, and monitor the health of the equipment in real time.
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