AC power supply management and environment monitoring device for automatic testing system

Abstract

The invention discloses an AC power supply management and environment monitoring device for an automatic testing system, and specifically relates to the technical field of AC power supply management testing system monitoring. The device comprises main units, wherein each main unit is connected with a plurality of slave units. Each main unit is provided with a main communication unit, and each slave unit is provided with a slave communication unit. The main communication units and the slave communication units are employed for achieving the bus communication between the main units and the slave units. Each main unit comprises a main controller which is connected with a man-machine interaction unit and a switching strategy management unit. Each slave unit also comprises a slave controller which is connected with a sensor unit and an on / off management unit, wherein the on / off management unit is provided with a contactor. The main units and the slave units employ a PLC as the control core, so the device is high in stability, is high in environment adaptability, and can provide a main control function stably.

Description

technical field [0001] The invention relates to the technical field of test system monitoring, in particular to an automatic test system AC power supply management and environment monitoring device. Background technique [0002] As the scale and integration of automatic test systems increase, an automatic test system often includes multiple cabinets (or assembly boxes), and each cabinet (or assembly box) integrates multiple instruments or PXI / VXI / LXI bus chassis, Due to the large overall power of the system, if all devices in the system are turned on at the same time, there will be various power-on safety problems such as large power-on surge and large leakage current. [0003] With the development of test technology, PXI bus chassis and so on are widely used in test systems, which need to be used in combination with host computers and complex instruments and equipment in various scenarios, such as AC power supply and power-off sequence management, in order to work normally;...

AI Technical Summary

Problems solved by technology

[0007] 1. The main control core uses single-chip microcomputer / ARM, and the work stability is insufficient. Power management is the core of the system work, and the tolerance requirements for power supply and environment must be very large. Using this type of control core often leads to power management downtime and restart.

[0008] 2. Using solid-state relays as the core components of power supply on-off management has very big disadvantages. Its on-off capability for capacitive and inductive loads is weak, and it is difficult to complete on-off stably and effectively. In addition, limited by solid-state relays, there is support The problem of low channel power

[0009] 3. The monitoring and management functions of environment and power parameters are weak, and only data acquisition and alarm can be performed, and no further management and protection actions can be performed

[0010] 4. The cascade management capability of multiple units is weak, that is, the number of slaves that can be accommodated by a single host is small, which is not enough to support the power management needs of the ultra-large-scale automatic test system. The program control address of the slaves cannot be changed freely, and the maintainability is poor

[0011] 5. Lack of display screen support, insufficient human-computer interaction function, the on-off status of each channel, the monitored power supply and environmental parameters, and alarm information cannot be displayed intuitively, which is not conducive to the system operator's first perception to obtain the current status information of the system

Images