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In order to realize the real-time and effective supervision ofconstructors’unsafe behavior, we put forward to apply RFID technology to thereal-time supervision of unsafe behavior.According to the analysis of factorsthat influence constructors’ unsafe behavior in the process of theconstruction, using the functionof RFID technology for information storage andreal-time location,so as to build subsystem based on static factors andsubsystem based on dynamic factors. We apply this system to realize real-time supervisionof constructors’ unsafe behavior.This technical method solves the deficiency oftraditional management methods ignoring constructors’ internal factors and letsreal-time supervision come true. In the end,it could improve safety managementperformance in construction site.

In order to overcome the power measurement error caused by switch leakage of time division multiplier, in this paper, the mechanism of switch leakage of no-beats time division multiplier was analyzed, and switch leak was tested. On the basis of this, power compensation circuit on zero point correction based on voltage feedback and voltage frequency conversion method is designed, subsequently the compensation effect was tested respectively. Test results show that the zero compensation method based on voltage frequency conversion method is better, the zero error decreased to 0.0022%, the accuracy of the power measurement was improved.

On the basis of introducing the working principle of the electrical fast transient pulse/burst generator, the method of combination of AC inverting and DC boosting is adopted to design a kind of DC high voltage power supply used for the electrical fast transient pulse/burst generator after the further study about the key technology of the high voltage DC power supply according to the requirements of IEC61000-4-4. The experiments show that the power output voltage reaches 5 KV, meanwhile the range of output voltage is from 0.1 KV to 5.0 KV within the linearity is about 5%, the electric power can be up to 250 watts. Above all, the design meets the requirements of the high voltage power supply for the electrical fast transient pulse/burst generator.

With the improvement of output frequency of electric fast transients (EFT) burst generator, amplitude attenuation of pulse train appeared in the high frequency. Therefore, the method of pulse width programmed digitally ,and realized by Field Programmable Gate Array (FPGA) device was put forward to overcome burst amplitude attenuation. The technology of direct digital frequency synthesis was used to adjust the output signal frequency changes. The linear array memory with one bit was adopted to store square-wave waveform, the output signal duty cycle is digital adjustable, which is achieved by changing the waveform data in the linear array memory. Brust generator is designed by using VHDL languages in the QUARTUS II 6.0 simulation platform. The simulation and experiment results show that when the frequency of the output signal reaches 1 MHz, frequency resolution arrives at 6Hz, error of pulse width is less than 10 ns.