Data acquisition circuit board and equipment monitoring system

A data acquisition circuit board, comprising:

• a power supply module configured to perform voltage conversion and supply a power supply signal;
• a micro-processing unit coupled to the power supply module;
• a data acquisition module coupled to the micro-processing unit;
• and
• a data transmission unit coupled to the power supply module and the micro-processing unit;
• wherein the micro-processing unit receives and processes data acquired by the data acquisition module, and outputs processed results to the data transmission unit, which transmits the processed results wirelessly;
• wherein the power supply module comprises a voltage conversion chip, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first diode, a second diode, an inductor, a power input end and a power output end, wherein the voltage conversion chip comprises a first port, a second port, a third port, a fourth port, a fifth port and a sixth port, wherein the first port is coupled to the sixth port through the first capacitor, the second port is grounded, the third port is grounded through the first resistor and coupled to the output end through the second resistor and the fourth capacitor connected in parallel, the fourth Port is grounded through the third resistor and coupled to the fifth port through the fourth resistor, the fifth port is electrically connected to the power input end and grounded through the second capacitor, and the sixth port is grounded through the first diode and coupled to the power output end through the inductor, and wherein the power output end is grounded through the third capacitor and the second diode, respectively.