Measurement and control system capable of isolating strong impulse interference
A technology of measurement and control system and strong pulse, applied in the field of measurement and control system, can solve problems such as test system damage, and achieve the effect of reducing damage, low cost and reducing range
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[0024] Example 1
[0025] Such as figure 1 As shown, a measurement and control system that can isolate strong pulse interference is used for a high-energy pulsed gas laser with a pulsed power supply, which is characterized by:
[0026] The pressure transmitter 4 is connected to the discharge cavity 7, and is responsible for measuring the gas pressure in the discharge cavity when the discharge circuit composed of the pulse high voltage power supply 1, the discharge anode 2, the discharge cathode 3, etc. discharges the gas in the cavity;
[0027] The isolation circuit 5 is connected to the electrical signal output of the pressure transmitter 4 to sample the output signal; and can achieve complete electrical isolation of the input and output signals; and realize the linear conversion of input and output;
[0028] The acquisition system 6 is connected to the output of the isolation circuit 5, and the non-interference signal output by the isolation circuit is collected into the computer sys...
Example Embodiment
[0042] Example 2
[0043] The output signal of the pressure transmitter is a 4-20mA current signal, so it uses figure 2 Way to make electronic circuit boards. The input end is connected to the output of the pressure transmitter, and the output end is connected to the acquisition system. Choose appropriate electronic components to make the linear coefficient of the optocoupler:
[0044] K3=K1 / K2=1 (1)
[0045] In this way, the relationship between the output voltage Vout and the input current Iloop can be obtained:
[0046] Vout / IlooP=K3*R3*R5 / (R3+R5) (2)
[0047] The applicant chooses R3 and R5 as 25Ω and 80KΩ respectively, so that the input 4-20mA current signal is linearly converted into a 0.8-4V voltage signal
[0048] The invention isolates the interference signal coupled to the pressure transmitter transmission line during the high-power pulse discharge. It effectively reduces the amplitude of strong pulse interference and prevents the damage of the strong pulse interference sig...
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