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Pulse measurement device, light intensity control method and program

A technology of measuring device and controller, applied in the direction of measuring device, measuring circuit, photometry, etc.

Active Publication Date: 2022-04-15
RENESAS ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, Japanese Unexamined Patent Application Publication No. 2016-86873 left the problem of not being able to successfully perform optical calibration depending on changes in the measurement situation after the start of the measurement

Method used

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  • Pulse measurement device, light intensity control method and program
  • Pulse measurement device, light intensity control method and program
  • Pulse measurement device, light intensity control method and program

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Embodiment Construction

[0018] Prior to the description of the embodiments, the development background of the following embodiments will be described. For example, perform optical calibration before measurement according to the following procedure. Immediately after the start of the calibration, the light emission amount of the light emitting element is set to a default value such as the maximum value. Each time the light-emitting element blinks, the amount of light emitted by the light-emitting element gradually decreases. As the amount of light emission decreases, the detection signal for reflected light detected in the photosensitive element recovers from a saturated state. When the AD value of a ΔΣAD converter for performing AD (Analog-Digital) conversion on a detection signal of reflected light reaches a center value (eg, value 0), the light emission amount is fixed.

[0019] Usually, a PGA (Programmable Gain Amplifier) ​​that amplifies a signal and adjusts a signal level is preceded by a ΔΣ A...

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Abstract

The present disclosure relates to a pulsation measurement device, a light intensity control method, and a program. There is a need to be able to perform optical calibration according to changes in the measurement situation after the start of the measurement. LED21 irradiates light to a main body. The optical detector 22 outputs an optical detection signal. The signal quality calculation section 14 calculates the signal quality of the pulsation signal generated based on the optical detection signal. The body motion level determination section 15 determines whether or not the subject remains stationary based on the acceleration detected by the acceleration sensor. The light intensity determination section 16 determines the light emission amount of the LED 21 based on the signal quality of the pulsation signal when it is determined that the subject remains in a still state.

Description

[0001] Cross References to Related Applications [0002] The disclosure of Japanese Patent Application No. 2016-191708 filed on September 29, 2016, including specification, drawings and abstract, is incorporated herein by reference in its entirety. technical field [0003] The present invention relates to, for example, a pulsation measurement device that irradiates light to a subject and generates pulsation information. [0004] The present invention relates to a light intensity control method and program in the above-mentioned pulsation measuring device. Background technique [0005] There are known pulsation measuring devices (pulse monitors) using a pulsation sensor using a light generator such as an LED (Light Emitting Diode) and an optical detector such as a phototransistor or photodiode. As related art, Japanese Unexamined Patent Application Publication No. 2016-86873 describes a vital sensor module capable of measuring pulsation. The life sensor module described in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/024
CPCA61B5/0059A61B5/02438A61B5/02444A61B5/681A61B5/7225A61B5/1118A61B2560/0223G01J1/4257A61B5/02416A61B5/721A61B2562/0219G01J1/44G01P13/00
Inventor 阵内正树
Owner RENESAS ELECTRONICS CORP
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