There are various inspection methods for vehicles, devices and equipment of rail transit. For lamps and PIS systems, the specific inspection methods are as follows:

Lamp inspection
Lamp inspection mainly focuses on its performance, safety and electromagnetic compatibility. The specific inspection methods include:

Appearance inspection: Check whether the appearance of the lamp is intact, whether there is damage, deformation or rust.

Light intensity test on the reference axis (headlamp): Test the light intensity of the headlamp on the reference axis to ensure that it meets the specified lighting requirements.

Light source performance, starting performance test: Test the light source performance of the lamp, such as luminous intensity, light source color rendering index, etc., as well as the reliability of the starting performance.

Voltage fluctuation range test, terminal temperature rise test: Test the stability of the lamp within the voltage fluctuation range and the terminal temperature rise to ensure its normal operation under different voltage conditions.

Low temperature test, high temperature test, alternating damp heat test: Test the adaptability and stability of the lamp under different temperature conditions to ensure its normal operation in complex environments.

Insulation resistance measurement, power frequency withstand voltage test: Test the insulation resistance and power frequency withstand voltage of the lamp to ensure its electrical safety performance.
Electromagnetic compatibility performance test: Test the electromagnetic compatibility of lamps to ensure that they will not cause electromagnetic interference to other surrounding equipment or be interfered by electromagnetic interference from other equipment.
PIS system detection
PIS system detection mainly focuses on its information display, broadcast function, emergency call and other aspects. The specific detection methods include:
Static test: Check whether the various display terminals of the PIS system (such as internal display, V-shaped screen, etc.) display normally, whether the text and images are clear, and whether the broadcast function is normal.
Dynamic test: Simulate various situations during the operation of the train to test whether the information display of the PIS system is timely and accurate, whether the broadcast content is clear and easy to understand, and whether the emergency call function is unobstructed.
Network test: Check whether the network connection of the PIS system is stable and whether the data transmission is smooth, to ensure that passenger information can be transmitted to each display terminal in real time and accurately.
Safety test: Test the response speed and accuracy of the PIS system in emergency situations, such as the reliability and stability of emergency evacuation prompts, emergency calls and other functions.
In addition, the PIS system can also adopt simulation and verification methods, using advanced computer simulation software to simulate the operating status of the system to verify the rationality and safety of the design scheme.
Comprehensive detection methods
In addition to special detection of lamps and PIS systems, the following comprehensive detection methods can also be used to detect vehicles, devices and equipment of rail transit:

Non-contact measurement technology: Use high-precision equipment such as laser rangefinders and inertial navigation systems (INS) to perform non-contact measurement of track geometry to reduce human errors.
Online monitoring and data analysis: By installing online monitoring equipment to collect real-time operation data of systems such as tracks, vehicles, and signals, use big data analysis technology to promptly detect anomalies and issue warnings.
Vibration and noise testing: Use vibration and noise testing systems to measure and analyze the vibration and noise levels of trains during operation to ensure that they meet the specified standards.
In summary, there are many methods for detecting vehicles, devices and equipment of rail transit, and it is necessary to select appropriate detection methods according to specific detection objects and detection requirements. At the same time, in order to ensure the accuracy and reliability of the detection results, it is also necessary to use advanced detection instruments and equipment and operate in strict accordance with the specified detection standards and procedures.