In response to the defects in the existing technology, the embodiment of the present invention provides a shielding detection method for a composite access card and a composite access card In the first aspect, the embodiment of the present invention provides a shielding detection method for a composite pass card, including: enabling a signal-to-noise detection module in the composite pass card Initialize the composite access card The signal-to-noise detection module periodically samples signals within the frequency range to be tested, and determines whether shielding behavior occurs on the composite pass card based on the output value of the signal-to-noise detection module In the second aspect, the embodiment of the present invention provides a composite access card, comprising: a controller module and a signal-to-noise detection module The controller module is used for initializing the signal-to-noise detection module The signal-to-noise detection module is connected to the controller module for periodic sampling of signals within the frequency range to be tested after being enabled, and the output value is sent to the controller module for the controller module to determine whether the shielding behavior of the composite pass card occurs based on the output value of the signal-to-noise detection module. The shielding detection method of the composite pass card provided by the embodiment of the present invention involves periodic sampling of signals within the frequency range to be tested by the signal-to-noise detection module in the composite pass card. Based on the output value of the signal-to-noise detection module, it determines whether shielding behavior of the composite pass card has occurred, realizing the detection of human shielding behavior of the composite pass card. The detection method is fast and simple, and the shielding detection can be completed during the driving process, It provides a basis for punishment for law enforcement agencies and high-speed operation agencies
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
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6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China