Omron-HEM-Solar-LTD-DesignMed Din Ce e Format Imagini

8/11/2019 Omron-HEM-Solar-LTD-DesignMed Din Ce e Format Imagini

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Omron HEM-Solar(HEM-4500-SOLE)

Solar-Assisted Blood Pressure Monitor - Live Teardown

DesignMedAnaheim CA / February 8 2011

David Carey VP Techn ical Intelligence / UBM Te [email protected]


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Copyright 2011 UBM, LLC

Background UBM TechInsights - Technical Intelligence and Intellectual Property Services

Chip-level Reverse Engineering

Teardown Reports & related research on Wireless, Mobile, Consumer Electronicsand Medical Devices

A Teardown covers: System architecture

physical implementation

Bill-of-Materials (BOM) and estimated Cost of Goods Sold (COGS)

System metrics.

Cellular Phones, Digital Cameras, Wireless Networking, Game Boxes,Multimedia, Medical, Broadband systems are primary areas of coverage.

Teardown analysis activities cover well over a decade of industry change andover 1000 product analyses.
http://www.ubmtechinsights.com/http://www.ubmtechinsights.com/reports-and-subscriptions/teardowns/http://www.ubmtechinsights.com/reports-and-subscriptions/teardowns/http://www.ubmtechinsights.com/http://www.ubmtechinsights.com/http://www.ubmtechinsights.com/


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Omron HEM-Solar .With the twist of solar -assisted charging...


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Omron HEM-Solar ..of a 2.4V / 600mAh NiMH cell. Twin AAAs provide a 3 rd Power Source.


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Omron HEM-Solar Five self-tapping screws hold the ABS- plastic enclosure together.


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Omron HEM-Solar ..a Two -Piece case, other than the LCD Window and Battery Door.


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Omron HEM-Solar Internal Screws hold Main Board and PCBs for LED and NiMH Connector.


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Omron HEM-Solar Plenty of hand-soldered wires connect power sources and LED


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Omron HEM-Solar A single CEM (FR-4 / Phenolic) Board holds most electronics.


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Omron HEM-Solar The LCD wraps around and mounts to the pressure sensor shield.


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Omron HEM-Solar Primary ICs are on one side of the PCB.

Toshiba#TMP86FS23UG*

8-bit Microcontroller

Seiko Instruments#S-93C56

1 Kbit Serial EEPROM

Toshiba#TC74VHC02

Quad NOR Gate

Linear Technology#LTC4060NiMH Charger

Seiko Instruments#S-817

50mA / 3.8V LDOVoltage Regulator


3.8V Step-Up SwitchingRegulator

*4.7mm x 4.7mm; 1999 ChipCopyright Date on die

LCD Connections

Pressure tube attach


Voltage Detector


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Omron HEM-Solar On/Off Switch, Pressure Sensor, and Power Connects occupy Side 2.

On / Off Button Pressure Sensor

Solar Panel Connects

AAA Battery Connects

AC Adapter Connects

NiMH Battery Connects


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Omron HEM-Solar So whats going on with the Pressure Sensor?

Basically, a Pneumatic Capacitor.


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Omron HEM-Solar And What About that Solar Cell?

A 50mm x 70mm thin-film Si on Glass:Probably about 3V @ 50mA based onsize or 150mW output. NiMH battery israted at 1.44WH so ~10 hours to fullycharge the NiMH battery in principle.Manual says 35 hours charge time in

bright sun so some combination of paneloutput estimate error and/or chargingefficiency loss must be at work.


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Omron HEM-Solar Estimated BPM Operation Basics.

RingOscillator

Circuit uController

Sys: 120

Dia: 80

Pressurized Cuff output changes capacitance of Pressure Sensor, affecting Ring Oscillator (RO)Frequency.

Assuming the system works similar to aneroid

sphygomomanometer and stethoscope approach :

When pulse is first detected in uController byfrequency change, Systolic is recorded. Whenpulse fades (monitored in RO output frequencystabilizing), Diastolic pressure reading is captured.

Pressure Sensor

Inflation Bulb

Pressure Cuff


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Omron HEM-Solar Power Source Management (very speculative; no trace-out performed).

Solar Panel Connects (3-4V)

AC Adapter Connects (6V) NiMH Battery Connects (2.4V)

Transistor Network

Linear TechnologyNiMH Charger

ElectronicsDiode Check Valve ?

AAA Battery Connects (3V)

Down-regulation to 3.8V Step-up to 3.8V


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Omron HEM-Solar And Cost of parts? (very roughly..)

Case/Enclosures/Plastics: $5Solar Panel: $1.5Electronics: $7LCD: $2

Pneumatics: $10 AC Adapter: $2Manuals/Box/Bag: $1.5

Call it ~ $30

Retail Price of $140-$150


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Omron HEM-Solar Thank you for your time

Visit: www.ubmtechinsights.com/markets-served/medical-devices
http://www.ubmtechinsights.com/markets-served/medical-deviceshttp://www.ubmtechinsights.com/markets-served/medical-deviceshttp://www.ubmtechinsights.com/markets-served/medical-deviceshttp://www.ubmtechinsights.com/markets-served/medical-deviceshttp://www.ubmtechinsights.com/markets-served/medical-deviceshttp://www.ubmtechinsights.com/markets-served/medical-devices

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