| 摘要 |
The present invention relates to a digital portable pulse oximeter and battery-powered control method thereof. The automatic switching of the power supply is achieved by adding a Hall circuit, and the data displayed is allowed to always face the users by adding an acceleration sensor to the circuit. The advantageous effects of the present invention compared with the prior art are: Users can always read the data from the front side no matter which way they move. The digital portable pulse oximeter of the present invention can be automatically turned on just by inserting a finger, without having to press the switch button, and cut off the power supply by pulling out the finger, as well as judge intelligently whether to continue the measurement after the finger has been pulled out. If yes, the power supply will stay on, which reduces the energy waste and low efficiency caused by the restarting program initialization, improves the use efficiency of the battery and prolongs the battery life. |
| 主权项 |
1. A digital portable pulse oximeter comprising:
a housing body having an upper housing body and a lower housing body, which are disposed such that they are stacked together, one end of both the upper housing body and the lower housing body being a measurement end where a finger is placed; a pivot and a reset spring being disposed between the upper housing body and the lower housing body enabling them to be opened and closed at the measurement end; a display window being disposed at outside of and atop the upper housing body, a display being disposed inside the display window; a power supply battery; and a measurement analysis circuit being disposed in the housing body, the measurement analysis circuit comprising a light-frequency converter, an infrared light emitting diode, a light-emitting driving circuit and a microprocessor; the microprocessor having a power supply stay-on output pin, the light-frequency converter and the light emitting diode being respectively disposed in the upper housing body and the lower housing body at the measurement end of the housing body; the infrared light emitting diode connecting to the light-emitting driving circuit, the interface circuit of the microprocessor connecting to the light-emitting driving circuit, the light-frequency converter and the display, respectively, wherein an acceleration sensor and a power supply switching-control circuit are also disposed in the housing body, the electrical signal of the acceleration sensor connects to the interface circuit of the microprocessor, wherein said power supply switching-control circuit comprises a Hall switch sensor, a magnet and a switch circuit, the Hall switch sensor and the magnet are respectively disposed in the upper housing body and the lower housing body at the measurement end of the housing body, said magnet induces the output pin of the Hall switch sensor to generate a high-low potential change through the opening and closing of the upper housing body and the lower housing body, the switch circuit includes a dual-input logic control gate circuit and a power switch device, the output pin of the Hall switch sensor connects to one input end of the dual-input logic control gate circuit, the power supply stay-on output pin of the microprocessor connects to the other input end of the dual-input logic control gate circuit, the output end of the dual-input logic control gate circuit connects to the control pin of the power switch device, the input of the power switch device connects to the power supply battery, and the outputs of the power switch device connect to the measurement analysis circuit and the display. |
