| 主权项 |
1. A pressure detection device for a blowgun, comprising:
a housing adapted to mount around a blowgun and having:
a cylindrical channel longitudinally formed through an upper portion of the housing;a sensor compartment formed inside a portion of the housing located under the cylindrical channel, and having a chamber defined therein; anda pressure-sensing opening formed through a top wall of the sensor compartment and communicating with the chamber inside the sensor compartment; and a pressure-sensing unit mounted in the chamber of the sensor compartment and having:
a pressure sensor integrated circuit (IC) mounted on the pressure-sensing unit and aligned with the pressure-sensing opening of the housing to detect an air pressure flow input generated inside the blowgun and flowing through the pressure-sensing opening upon a blowgun shooting, and outputting a voltage signal corresponding to the detected air pressure flow input;a micro-controller unit (MCU) mounted on the pressure-sensing unit, connected to the pressure sensor IC, converting the voltage signal received from the pressure sensor IC into a detected datum through an analog-to-digital conversion, and built in with a procedure for performing calibration and calculation with the detected datum to generate a blow-off pressure value;a display screen connected to the MCU and serving to display the blow-off pressure value received from the MCU;a battery serving to provide DC power to the pressure sensor IC, the MCU and the display screen;a direct current (DC) voltage boost IC connected to the pressure sensor IC, the MCU, the display screen and the battery to receive the DC power from the battery and to boost the DC power to supply an operating power to the pressure sensor IC and the MCU for operation; anda power-saving control circuit connected to the MCU and the DC voltage boost IC, wherein the pressure-sensing unit further has a switch connected to the MCU, when the switch is pressed for the first time, the power-saving control circuit activates the DC voltage boost IC to supply a boosted voltage to the pressure sensor IC and the MCU, after the MCU starts operating, the MCU controls the DC voltage boost IC in a state of continuously supplying the boosted voltage through the power-saving control circuit, and when the switch is pressed for over several seconds, the MCU then instructs the power-saving control circuit to shut down the power supplied from the battery. |
