苹果手表和小米手环的心率传感器工作原理介绍

时间： 2024-07-09 来源：可天士公众号

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心率传感器是智能穿戴设备中使用较为普及的传感器之一，顾名思义，它主要运用于心率检测。无论是年老群体，还是年轻一族，越来越多的人开始重视身体健康，而心率检测的需求也随之增长，心率传感器行业也开始兴盛发展起来。

心率传感器原理是什么？

我们以苹果手表和小米手环为例，来了解心率传感器原理。

Applewatch心率监测

心率监测还可以说是AppleWatch最具革命性的一大功能，它到底是如何实现的？AppleWatch利用LED绿光和红外光，以及两种光传感器来检测心率。当其处于15摄氏度以下的低温时，根据测量绿光的吸收状况来获得更加精准的数据。而高温环境下，例如用户已经在健身房里挥汗如雨时，皮肤表面水分增加，由于更多绿光已经被吸收掉，要检测皮下反射的绿光就比较困难，此时AppleWatch就转换到红外光模式。这类用于血流检测的光学技术，专业上称为“光电容积脉搏波描记法”，简称PPG。光电容积脉搏波描记法PPG就AppleWatch来说，测量心率时底部的表盘会发出绿色的灯光，而且测量的时候手腕最好维持不动否则会干扰测量结果。

小米手环检测心率

1、利用反射原理，对人体红细胞的含氧量进行检测。

2、根据检测脉搏传导速率的方法，计算出心电检测和脉搏检测的时间差，由此得到血压的信息。

3、根据内外两侧的温度感应，获得对应的更加准确的人体温度值。

4、根据代谢热整合法，检测到代谢形成的热量。

心率传感器测量会存在误差，由于测量部位会进行移动、周围存在日光灯、自然光等其他因素的干扰，最终会干扰到检测到的信号会存在很多的噪点，需要根据多种方法对其进行滤波处理，而这就是心率传感器厂商的核心算法，它会直接干扰到最终心率的准确性。光学心率传感器还可以生成测量心率的PPG波形并将该心率数据作为基础生物计量值，但是利用PPG波形还可以测量的目标远不止于此。在大量的市场需求之下，心率传感器的相关技术也在升级发展着，在各式各样的可穿戴智能设备中，心率传感器发挥的作用也将越来越关键。

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本文由ll转载自可天士公众号，原文标题为:心率传感器，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。

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功能:计步，呼救，定位，调度等推荐手环。

我们世强目前有提供手环上的心率（Silicon Labs SI1144心率传感器）、GPS定位等方案。如果您需要找成品建议看一下乐心、小米等品牌。

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KODENSHI（可天士）光电器件/编码器/传感器/红外遥控接收头选型指南

目录- 公司介绍光敏器件发光器件光电开关编码器传感器红外遥控接收头外形图目录产品目录

型号- KEL-5315C,SCM02-B38,STE,KE2N23F-XX,SEL3528-01,SST553R-01,SIC507D,SST324R-02,SPDI5H7,SML955-11,SPS-12CU,SST553R-02,SRV455-ML01,ST-1MLA,SIS-ED05,ST-1MLB,SPDI542R-F4J,SIS-ED07,PS124TL1,SIS-ED04,SIS-ED03,SFIC553-01,SIS-ED27(ST),SFIC553-02,KEL-1ML2,PS119EL1,SIT30301,S系列,SST755-CL 01,SEL854-01L,SIC506L,SPDI552-02,SST334-02,SEL388-01,SST334-01,SEL755-01,SIT401P1,SPDTS-01,KEF252500CB,S SERIES,EL-1CL3,SIR801,SIT307,SIT204F-02,SIT204F-01,SIT304,SST533R-01,SIT306,SST533R-03,SIT305,PSR11TD1-A,SST433R-10,SPDI341R-01VS,SIT302,SF-14,KE2N19F-XX,SP-1ML,SML955-11T1,SEP,SST553-02,SIS-PT16(ST),SIS-ED23(ST),HPI6FER2,SEP W,SST533R-04,SEP Z,KEL-1KL3V,SIT509,KEITU013S,SEP FA,SGL324-02,SPDA-BD,SIT516,SPS119ED1,PSR11EL6-D,SIT515,SIT514,SRM603LM2M-2,SG-105LF,SIC801D,SIC504L,SIS-ED04(ST),SIC553-03,SIC553-04,SIC553-01,SPDI533R-02,SRV1206-04,SIC553-02,SCG系列,SIS-PT12(ST),SRS-16L,SIT401,SIC503L,SIC433-02,SIT316F,CL-1KL3,SUV455C-01,SIT512-C1,CL-1KL7,SE201,SF-10B,SML766L-01,SIT612,SIT512-CM,SIT401P,SEL553-02,SEL553-03,ORA3S01,SPDI441R-16F,SEL323-04L,KEL-1KL2,K1T3025S,SIA101,SIT206F,SIR-SD5,S42B8 SERIES,SIM304,SST955-01,SPDI552-01-KT,SPDI355-02,STE SERIES,S42B8,R903V-7CL,HPI610A,SPN-S6DN2-02,SIT506,SIT505,SF-10A,SIT508,SIT501,SPDI433-01,KEF SERIES,SIR201,SIC501L,KIR-5105J,SPDI754-03S,SIC501D,SRV555-CL01,SEL331,EL-1KL5,SCM SERIES,ORD1S06,APS01228D,SPDI488-01,EL-1KL3,SIA201R,CL-203,SBV533-06,ST-1CL3H,KE1△01C-15-18,KE2N26F-ZXX,CL-207,CL-209,SICD01L,PS117ED1,R123V-712,SIC553S-04,SCG01-F68,SUV455-03,SRV0805-03,SBV5073-01,SRV0805-01,PS124GD1,SML955-04,KEITU005C,SML955-03,SREC02 SERIES,SIC209D,SST655-01T,SCA系列,SIT604,SEL955-02,KIT2011S,SEL955-03,SIT601,SPDI754R-01,CL-211,SPDI754R-02,SIT602,SRS-13,SIS-ED03(ST),SPDI752-01,SG2A241,SG-105F6,STLS-150,SST331,SST533R-04N,APS623,PS124TD1,SEL755-CL01,KEITS003S,EL-1K3,PS119ED1,SCT-02,SCT-01,SEL3315,SIT205-01,PICA56337,SF-12B,KIR5105J,SIC401L,SIR501G,SIC401D,ORA1S01,KST-1KL3A,KIT3025S,SCA SERIES,SEP FA SERIES,SWL5050-03,SST5003,SML752-02,SST5001,SP-1CL3,SST3315R4,SEP08-W18-2PL,SCG SERIES,KEF302500CB,SF-12A,SPIC1206-01,SF-10,HP202G,SIS-ED06(ST),SUVM375-01,SIT303-01,SPT334R-01,SIC502D-E,KE1△01C-075,SST854R-01L,STE系列,SST0603R-02,SML655L-01,SPDA992-05,SIT512-C,SEP W SERIES,ORD1M13,SIS-PT23(ST),SF-11B,SPDI753R-01,STLS-25D,SPS119EL1,OEA-01,KIT3033S,SCL555-CL01,SIS-PT06(ST),SEL753-03,SG-105,SIC302D,SIS-PT27(ST),KIT3035S,SIR501-C,SST755-CL01,SBV0805-01,SEL323-04,HPI6FER2H,SD202,SITK01-C,SPDI552R-02,SD201,SPDI752-01K,SF-11A,SIR501,SDS1A015-02,SST533R-02PT,SGV0603-03,SPDB82-01,SST533-03,SST388-01,SEL334-01,SEL334-02,SF-11,CL-1CL3,SEL334-03,SIC204F,SITAB74,ST-1KB,SIT511-C,SST854R-01,SITA01-C,ST-1KLB,SF-14B,ST-1KLA,SPD862-03,KCL-203HL,SPD994-02,SIT506S,ORA1L03,SPDI533-01,STE01-01 SERIES,SIT210,SST553-02LD,SIT2A082,SEL533-04,SIR765-02,SST955R-02,KEEN5001A,SST955R-01,SEL533-02,SEL533-03,SEP Z SERIES,SEL533-06,SFCV5050-05,SEL554-1ML2,SEL5003,SF-14A,ST-1MLBR2,SIS-PT20,SIT505S,SIT101,SCA02-W713,SREC02,SPDI754-03,KIT3032S,R123V-10E,SEL854-01,SIS-PT24,SF-12,SEL5001,SRV955-04,SST662-01,SST753R-01,SPDI752R-02,SRV655-CL01,STLS-20D,KAPD-800-001,SG130,SIS-ED20,KAPD-800-002,PSR11TL1-A,KDT-6315A,SIT510-C,SEL324-02,SG132,KEITS005S,STE01-01,SIS-PT18,SPDI542R-F4,SIS-PT16,SST533R-02P,SIT601S,SIS-PT19,SIT504S,SF-13B,SIT311,SPDI752R-03,SPDI752R-04,PS117EL1,SPDI955R-02F,SIS-PT12,SE202F,SPN-B6CA,SRS-12L,SCA,SEP SERIES,SCL334-02,SIS-PT07,SIT208,SIS-PT04,SIS-PT05,SIS-ED18,KST-1KLB,SIT205,SF-13A,SIS-PT08,SIT207,SCG,SST755-02,ST-1KL3A,KEF系列,ST-1KL3B,SCM系列,SPDI542R,SEP系列,SF-13,SP-1KL,SCM,SIS-PT03,SIT506F-A,SEP07-Z36L

2023.08 - KODENSHI - 选型指南代理服务技术支持批量订货

KODENSHI光敏器件选型表

提供PIN型光敏二极管、光敏三极管、环境光传感器、达林顿型光敏管、光敏二极管、光敏二极管阵列、光电集成电路的选型

产品型号	品类	Open circuit voltage(V)(Typ)	Short circuit current (uA)(Typ)	Dark current(nA)(Max)	Capacitance(pF)	Spectral spensitivity(nm)	Peak wavelength(nm)	Operating temperature(℃)	Half angle(deg)(Typ)
HPI6FER2(H)	PIN型光敏二极管	0.4	50	200	48	700~1100	1000	-30~+70	±50

选型表 - KODENSHI 立即选型

KODENSHI（可天士）光电元件选型指南

目录- Integrated Production Process OPTO ELECTRONIC COMPONENTS MATRIX MICRO ELECTRO MECHANICAL SYSTEMS APPLICATION PRODUCTS OF MEMS TECHNOLOGY PHOTODIODE CHIPS LED CHIPS DETECTORS EMITTERS PHOTOINTERRUPTERS ENCODERS PHOTO ELECTRIC APPLICATION SENSORS PHOTO ICs・LSIs INFRARED RECEIVER MODULES OPTO ELECTRONIC COMPONENTS Products List Terms・Symbols

型号- PIC2410,PIC-A1814□TE5,PIC-A1804□SM,PIC-A1804□SP,PIC-A1804□SR,SD-503,LG205,KE2△23F-□L,LG206,ST601,LG207,PIE310,ST-1MLA,HPI340R2,EL6F11,LG217L-□,ST-1MLB,PS124TL1,LG248NL□,LG207D,ORD3S05,PIC79603,OPA8518PPSA,LG413D,PS119EL1,HPI304R4L,SG233V1S-S,LG207L,KEM-101-△30,PS126GL1,EL333,SG2A194,LG2A30L,LG214,KEF252500CB,SD-612,EL-1CL3,LG209,SG227V,LG206D,PSR11TD1-A,PIC-A1804□TM2,KE401-M120-R1,ST3552,PSR11GD6-F,ORA2P03,SG SERIES,PIC-A1804□△△△,SP-1ML,LG206L,LG248BL,SG206F,SG2C09-S,EL321,HPI6FER2,PIC-A1814□TC5,LG2A02D2,LG2A22ND2,KE-2△18-□,OPA8205PPS,SG205,TPS01504,LG209D,SG209,LG416NL□-01R,PSR11EL6-D,SG206,LG2A09NL□,SG207,KE-2△10-□,ST3522,ORA1M05,LG2A24BL1,ORA1M04,LG209L,LG2A30D,LG2A21L2,LLG214D,ST615,LG2A18L2,KEM-101-△15,LG217D-□,LG285D□,HPI622,HL221,LG2C15D,LG2A13NL1,ORD1L31-080,SG23FT,SG285□,HPI6FFR4,ST3592,CL-1KL3,HPI6FFR2,PID310D,CL-1KL7,LG413NL,PIC0103SL,PIC-A1814□TH5C,KE-2△19-□,LG2A17D4,HPI215,HL615H,KM1102-N16S14,ORA3S01,LG SERIES,ST23G,HPI219,SG222V2,SG2A032,LG226L,LG214L,ORD2S06,PIC-A1814□LJ,HL-331,PS122TL4-A,ST341R2,KE-2△18F-□,PD-012,HPI610A,PS182EL1,DI352L2,PS181FL1-M,PICA1814□△△C,HP601,SG23FH,SG23FF,SG211V,LG214D,ML615,LLG205D,LG415NL□,PID310L,LG205L,SG299□,HP5FR2,HP5FR4,PIC96601,EL-1KL5,SG275□,KM1102-NECS14,EL-1KL3,KM1102-N04S14,CL-203,HPI6FGR4,ST-1CL3H,CL-205,CL-207,LG2A27D4,CL-209,SG402,PICA38603,SG238V,DI310D,ORA1L15-J6,PS117ED1,SG405,LG205D,LG416NL□,DI310L,LLG206D,SG267V2,PS124GD1,KED-45,TPM227,ST3582,OPA8508PPSA,HPI-2464,SG2A174,G3522,KE2N26F-Z□,KE-2△13F-□,SP217,LG2A23ND2,ORD1L31-160,HPI6FH,ST333R4F1,LG283D□,PIC0903SL,HL6F,CL-211,SD6201,HPM349,LLG207D,SG2B01V,LG2A17ND4,KE2N26F-U,HPI307,SG2A241,PICA0719,SD-101,ML-1CL3,PID352D2,PS124TD1,MD2C08,SG277,KE-2△19F-□,SD-103,SG278,SG276,EL-1K3,SG268,PS119ED1,ORA1L17-J9,LG2A19D4,KE-2△13-□,HPI615S,KM1102-NECL14,KE-2△14-60,EL611,HPI23G,SG2C12,ORA1S01,SG2C13,SG2C10,SG2C11,ST310,HL601,SG2C15,PIC-A1804□LQ,SG264,PS181EL1-S,SG257,PS181GD1-M,KEF302500CA,KEF302500CB,LG2A19ND4,LLG209D,EL615,BL15-1101H,PIC-A1804□TE2,SG2A01-A,KED-15,SG2A022,PS133GD1,SD-201,LG2A02L2,OPA6525PPS,LG2A21D2,G3552,SG290,SG294,SG2A06,SD-202,KM1102-N08S14,HL615,SG298,ORD1M13,PIC-A1804□LU,LG2A02ND2,PICA39337,HPI5FCR2,LG2A22NL2,SG128IR,LG415NL□-01L,SG2A131,SG2A252,SG-107,PIC-A1814□△△△,SG-105,PIC2503SL,DD3-30,HPI340,SG282,SG288,LG2A18D2,LG285L□,KE2N27F-Z□,PICA0237-1,SD-112F2,CL-1CL3,BL15-1212H,KE2△23-□,PIC-A1814□SY,EL341M,ST-1KB,SG112,SG226,PIC-A1804□TH2,ST-1KLB,DS3-20,ST-1KLA,ST333R4,KEF251250CA,DS3-23,PD-07N,PIC0903R4SL,DS3-27,LG243D,ORA1L02,DS3-25,LG248D□,G3582,EL342M,OPA8510PPS,PIC8836-1,SG223,HPI-2464R5,SG220,SG213,SG214,LG2B04D,HP202,ST-1MLBR2,DS3-16,G3592,SG2C02,HPI307R2,SG2C05,SG130,SG2C06,KE-2△10F-□,G310,PSR11TL1-A,SG255,ORD2S06H,SG256,SG132,HP333,SG128,PS122GD4-A,EL333F1,OPA6515PPS,ML341H,PS117EL1,PIC4103SL,SG248□,KE2△22-□,SD-112,PIC-A1814□TH5,LG2A16L2,PIE3522,SG243,ORA3S01S,EL23G,PS135GL1,LG2A23NL2,ST-1KL3A,ST-1KL3B,LG283L□,SP-1KL,LG220D

2022/10/12 - KODENSHI - 选型指南代理服务技术支持批量订货

KODENSHI（可天士）光传感器新产品选型指南

目录- Semiconductor Products Introduction IoT Solution Industrial Equipment and Medical Equipment Solution Home Electric Appliance Solution OA Solution Automobile Solution/Amusement Solution Illumination and Signage Solution

型号- SG2A241,LG283,LG285,KLB16□ SERIES,KOI-6713BT,MD2C08,PIC-A18,SG278,LG2A19D4,PIC79603,ORAXSXX,HPV-2KB,PS126GL1,ORA1SXX,SG2A194,PICA4550-02,LM803 SERIES,KEF,LG SERIES,PS181EL1-S,KLB16□,SG SERIES,PS181GD1-M,LG206D,KE401-M120-R1,PSR11GD6-F,ORA2P03,LG2A04,PICA2632,LG206L,PS133GD1,SG2A022,LG2A02L2,ORD SERIES,LG2A21D2,LM803,LG2A22ND2,OPA SERIES,HL652-002(T),TPS01504,LG2A02ND2,PSR11EL6-D,LG2A22NL2,TPT,LW831 SERIES,LG2A21L2,ORA1MXX,LP801,KIT3035S,LG2A18L2,HIC192,LG2A18D2,ORD1LXX,HL222,LW831,PICA0237-1,LP801 SERIES,OPA,EL341M,HPI6FFR4,LG248,KE2△27□-Z**,LG2A17D4,PIC-A18 SERIES,HP5F,ORA1L03,ORA3S01,KOE-1108D,PICA0921,ORA1LXX,SG2A032,KE2△26□-Z**,KE1S01C-36,KE1N01C-18,ORD2S06,OPA8510PPS,KE1S01C-30,PS122TL4-A,ST341R2,PS182EL1,PS181FL1-M,ORD1MXX,ORDXSXX,LW812,KIT3032S,ML615,KEF SERIES,ORA,ORD,LW812 SERIES,PIC96601,ORA SERIES,SG2C06,ORD1SXX,SG132,PICA38603,SG128,PS122GD4-A,TPT SERIES,KE1S01C-15,SG2A174,LG2A23ND2,LM618,LM618 SERIES,KE SERIES,LG2A23NL2,HPM349,LG2A17ND4

Oct. 2022 - KODENSHI - 选型指南代理服务技术支持批量订货

KODENSHI反射型光电开关选型表

提供不同反射距离的反射型光电开关

产品型号	品类	PIN间距（mm)	反射距离（mm)	VF Max(V)	IR Max(uA)	ICEO Max(nA)	IC Min(mA)	Operating temp(℃)	tr typ(usec)	tf typ(usec)
SIR201	反射型光电开关	10.5	2	1.4	10	100	0.2	-20~+85	5	5

选型表 - KODENSHI 立即选型

KODENSHI（可天士）照明用和装饰用LED选型指南

目录- LED APPLICATION LED LINEUP LED PRODUCT INFORMATION CHROMATICITY COORDINATES DIAGRAM TERMS / CAUTIONS

型号- LP801 SERIES,LP812,LP831-010D(T),LW815 SERIES,LP,LX815-003,LZ801-006D,LW831 SERIES,LD806,LW812 SERIES,LP812-***,L□801,□□□803 SERIES,LW831-007D(T),LY812-003A(T),ABL803,LX801-013A,LY801-003D,LY815-003D,LW812-1BA2000,LW812-1**2700,LW815,LP PASTEL SERIES,LA812-001A(T),L□815 SERIES,LW831-008D(T),LD831 SERIES,L□831 SERIES,LM803 SERIES,LD831-012A(T),L□815,L□812,LX812-003A(T),LX831-009A(T),LD831-011A(T),LW812,LD806 SERIES,BEL803,LY801-002D,LM803,LW815-014D,LP812 SERIES,LZ812-001A(T),LP831-010D,LD831,LY831-002D,LZ831-003D(T),LD806-004,LM803-028(T),LZ815-004D,LP801,L□812 SERIES,LD831-009A(T),LP SERIES,L□831,LW812-005A,LP801-***,BIL803,LP PASTEL,□□□803,LY831-002D(T),LX831-006A(T),LW831,L□801 SERIES

2021/11/9 - KODENSHI - 选型指南代理服务技术支持批量订货

KODENSHI红外测距模块SDSA015-02完美替换GP2Y0A51SK0F

KODENSHI红外模块采用PSD三角测距法，在短距避障模块中，KODENSHI的红外测距模块SDSA015-02，可以完美替换GP2Y0A51SK0F。

2018-05-12 - 器件选型代理服务技术支持批量订货

KODENSHI发光器件选型表

提供不同波长,功率的发光器件：红外发光二极管、紫外发光二极管、雪崩二极管、发光集成电路、白光发光二极管、蓝光发光二极管、绿光发光二极管、红光发光二极管

产品型号	品类	Forward current(Max)(mA)	Reverse voltage(Max)(V)	Power dissipation(Max)(mW)	Operating temp(Max)(℃)	Radiant intensity(Typ)(mW)	Forward voltage(Max)(V)	Peak wavelength(Typ)(nm)	Half angle(Typ)(deg)
SEL323-04	红外发光二极管	50	5	75	-25~+85	0.8[Min.]	1.5	940	±20