US 12,588,840 B2Granted

Blood oxygen concentration measurement device and method

AssigneeQuanta Computer Inc.

InventorsPeng-Zhe Tsai, Yung-Ming Chung

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Abstract

A blood oxygen concentration measurement device includes a light source unit, a light detection unit, a signal processing circuit, and a control unit. The light source generates a light signal. The light detection unit receives a penetrating signal generated by the light signal penetrating an object to generate a detection signal. The signal processing circuit receives the detection signal and processes the detection signal to generate a first processing signal. The control unit receives the first processing signal, calculates the blood oxygen value, the pulse rate and the signal strength index according to the first processing signal, and outputs the blood oxygen value, the pulse rate, and the signal strength index, or performs a low perfusion signal measurement process according to the signal strength index and the first predetermined index.

Claims12

Dependent claims

A blood oxygen concentration measurement device, comprising:

a light source unit, configured to generate a light signal;
a light detection unit, configured to receive a penetrating signal generated by the light signal penetrating an object to generate a detection signal;
a signal processing circuit, configured to receive the detection signal and process the detection signal to generate a first processing signal;
and
a control unit, configured to receive the first processing signal, calculate a blood oxygen value, a pulse rate and a signal strength index according to the first processing signal, and output the blood oxygen value, the pulse rate, and the signal strength index or perform a low perfusion signal measurement process according to the signal strength index and a first predetermined index;
wherein the control unit determines whether the signal strength index is greater than the first predetermined index, when the control unit determines that the signal strength index is greater than the first predetermined index, the control unit outputs the blood oxygen value, the pulse rate, and the signal strength index, and when the control unit determines that the signal strength index is not greater than the first predetermined index, the control unit performs the low perfusion signal measurement process;
wherein the control unit further determines whether the first processing signal is within a predetermined measurement range, when the control unit determines that the first processing signal is not within the predetermined measurement range, the control unit controls the signal processing circuit to adjust a driving signal to generate an adjustment signal, so that the light source unit generates the light signal according to the adjustment signal, and when the control unit determines that the first processing signal is within the predetermined measurement range, the control unit calculates the blood oxygen value, the pulse rate, and the signal strength index according to the first processing signal.

4 more elements

A blood oxygen concentration measurement method, comprising:

using a light source unit to generate a light signal;
using a light detection unit to receive a penetrating signal generated by the light signal penetrating an object to generate a detection signal;
using a signal processing circuit to receive the detection signal and process the detection signal to generate a first processing signal;
using a control unit to receive the first processing signal;
using the control unit to calculate a blood oxygen value, a pulse rate, and a signal strength index according to the first processing signal;
using the control unit to output the blood oxygen value, the pulse rate, and the signal strength index or perform a low perfusion signal measurement process according to the signal strength index and a first predetermined index;
the control unit determining whether the first processing signal is within a predetermined measurement range;
when the control unit determines that the first processing signal is not within the predetermined measurement range, the control unit controlling the signal processing circuit to adjust a driving signal to generate an adjustment signal, and performs the step of using the light source unit to generate the light signal;
and
when the control unit determines that the first processing signal is within the predetermined measurement range, performing the step of using the control unit to calculate the blood oxygen value, the pulse rate, and the signal strength index according to the first processing signal;
wherein the step of outputting the blood oxygen value, the pulse rate, and the signal strength index, or of performing the low perfusion signal measurement process according to the signal strength index and a first predetermined index, comprises:
determining whether the signal strength index is greater than the first predetermined index;
when the control unit determines that the signal strength index is greater than the first predetermined index, the control unit outputting the blood oxygen value, the pulse rate, and the signal strength index;
and
when the control unit determines that the signal strength index is not greater than the first predetermined index, the control unit performing the low perfusion signal measurement process.

12 more elements

Dependencies are inferred from the claim text.