Ultrasonic heat meter is now the heating project, an essential measuring equipment, and in the installation site is generally more lines, so in order to deal with different working conditions on the site, what anti-interference treatment has been done ultrasonic heat meter? Let’s take a look at it.
Analog circuit and digital circuit processing: In the design of the circuit board, the analog circuit and the digital circuit in the circuit should be distinguished, and the analog circuit should be properly larger than the digital circuit in the line width of the PCB production. The distribution of analog ground and digital ground of AD converter should be strictly laid out according to its requirements with reference to its chip data.
Power line and ground line treatment: In the design of the circuit board, the width of the power line and ground line should be widened as far as possible, after the circuit board wiring is completed, the bottom and top layer of the ground treatment, the components on the circuit board need to be grounded with copper coated pins are connected, which can greatly improve the anti-interference performance of the system.
The layout of the capacitor: The layout of the capacitor tries to place the decoupling capacitor, filter capacitor and bypass capacitor around the corresponding component. The wiring, pin wiring and wiring of the printed circuit board cause inductance, the presence of which can cause ripple and burr on the power line, and the placement of a decoupling capacitor between the power supply and the ground can effectively filter out the high-frequency ripple.
Post time: Mar-10-2024