Application of High-Voltage Power Supplies in Security Inspection

In an era with increasing demand for security, the security inspection field serves as a crucial line of defense for public safety. The efficient operation of its technical equipment relies on the support of key components, and high-voltage power supplies are among them. With stable high-voltage output and unique electrical characteristics, high-voltage power supplies are deeply integrated into various security inspection devices, playing an irreplaceable role in enhancing the accuracy, efficiency, and safety of security inspections.
In X-ray security inspection equipment, high-voltage power supplies are the core power source for generating X-rays. By applying tens of thousands of volts or even higher voltages to X-ray tubes, they accelerate electrons and make them collide with the anode target at high speed, thus generating X-rays. The stability and accuracy of the high-voltage power supply's output voltage directly determine the intensity and quality of the X-rays. A stable and precise high-voltage output ensures that when X-rays penetrate objects of different densities, clear and accurate images are presented on the imaging system, enabling security inspectors to quickly identify hidden dangerous items such as metals, liquids, and explosives. Meanwhile, the fast response characteristics of high-voltage power supplies allow for rapid startup and shutdown of the equipment, effectively improving the throughput of security inspection channels.
High-voltage power supplies also play a crucial role in millimeter-wave security imaging devices. These devices construct images of the human body or objects by transmitting millimeter waves and receiving reflected signals to detect concealed items under clothing. High-voltage power supplies provide stable bias voltages and operating power for the electronic components in millimeter-wave transmitters and receivers, ensuring stable transmission and accurate reception of millimeter-wave signals. Stable high-voltage power supply can reduce signal noise, improve the resolution and signal-to-noise ratio of the images, enabling security inspectors to clearly distinguish tiny suspicious items and enhancing the accuracy and reliability of security inspections.
In addition, in ion mobility spectrometry (IMS) security inspection equipment, high-voltage power supplies are used to generate the electric field required for the ionization process. When air carrying samples enters the equipment, sample molecules are ionized under the action of a high-voltage electric field. Subsequently, driven by the electric field force, different ions are separated and detected according to their differences in mobility. The stability of the high-voltage power supply's output voltage directly affects the ionization efficiency and separation effect. A stable high voltage ensures the repeatability and accuracy of ion mobility spectra, helping security inspectors quickly and accurately detect trace amounts of prohibited substances such as explosives and drugs, and building a solid defense line for public safety.
In practical applications, security inspection environments are often complex and changeable, posing higher requirements for the reliability and adaptability of high-voltage power supplies. Therefore, high-voltage power supplies used in the security inspection field usually feature strong anti-interference capabilities, small size, and light weight. Through optimized circuit design and the use of shielding technology, they can effectively resist external electromagnetic interference and ensure the stable operation of equipment in complex electromagnetic environments. The miniaturized and lightweight design facilitates equipment integration and mobile deployment, meeting the security inspection needs of different scenarios such as airports, railway stations, and large event venues.
With the continuous development of security inspection technology, higher standards are also set for the performance of high-voltage power supplies. In the future, high-voltage power supplies will develop towards higher voltage accuracy, lower ripple, faster response speed, and intelligent control, further enhancing the performance of security inspection equipment and providing more powerful technical support for maintaining public safety.