GB/T 41774-2022
Forensic sciences—Code of practice for identification of explosive device (English Version)
- Standard No.
- GB/T 41774-2022
- Language
- Chinese, Available in English version
- Release Date
- 2022
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 41774-2022
- Scope
- This document establishes the identification procedures and steps of explosive devices in the field of forensic science, and describes the inspection methods and judgment basis of explosive devices. This document applies to the inspection and identification of explosive devices that have been decomposed in the field of forensic science, and other fields can also be used as a reference.
- Introduction
Professional and technical background of standard formulation
Compared with the 2008 version of the preliminary review standard, this specification adds matching verification requirements and a three-dimensional inspection process for X-ray machines. The introduced safety assessment system enables the explosives inspection to evolve from instrument detection to system analysis.
Technology evolution pace
Indicator system 2008 edition 2015 revised edition 2022 new edition Functional verification requirements Single instrument detection Extended component analysis System matching verification Safety assessment means Text inspection specifications Graded protection catalogue X-ray machine + structural modeling Ignition mode classification Physical trigger definition Class II branch structure Five-level classification verification system
Component functional characteristics inspection
When using a multimeter to inspect circuit parameters, ensure that the component under test is within the spectrum scan detectable domain value. For example, in the IED case uncovered in 2019, the three-point positioning method was used to establish a 3D reconstruction model for the vernier caliper size data.
Analysis framework of ignition mode
- Flame transfer type: The ignition point must meet the aperture calibration standard (≥2 joules/cm2)
- Kinetic activation type: A tooth-shaped firing pin mark depth of <0.1mm is judged as failure
- Electric energy trigger type: Relay throttling parameter inspection benchmark
Judicial implementation recommendation specifications
Case scenario Precautions Detonator network evidence chain Prioritize Micro-fusion mark imaging and fixation Intelligent detonation device Use electromagnetic shielding box to separate components
GB/T 41774-2022 Referenced Document
- GB/T 41775 Forensic sciences—Terminology for explosive identification
GB/T 41774-2022 history
- 2022 GB/T 41774-2022 Forensic sciences—Code of practice for identification of explosive device