Biosensors: Avoiding errors measuring physiological functions like EKG, heart rate, and temperature

Wearable medical devices are biosensors attached to the human body to detect and monitor changes and capture biological / physiological data. These devices are usually non-invasive devices that function autonomously. Monitoring older adults and subjects with chronic conditions in the home and community are a growing focus of these applications. Common types of physiological functions [...]

May 11th, 2017|Categories: Medical Devices, Sensors, V2017, Wearable Devices|

In the news “Finding some “Sense” in 2015

  January 27, 2015 - Walt Maclay appeared in the MDT blog.  

February 5th, 2015|Categories: Medical Devices, News, Sensors, Trends|

Maclay Featured in December 2014 Issue of Medical Design Technology

Walt Maclay shares his perspective on 2015 in Sean Fenske's column "Perspectives On What's Ahead in 2015" in the December 2014 Issue of Medical Design Technology. "During 2015, sensors will continue to be a driving force for innovative medical devices. We will see advances in chemical sensors, especially "lab on a chip" and paper-based sensors.  Driven [...]

January 2nd, 2015|Categories: Medical Devices, News, Sensors, Trends|

Sensor Innovations: Trends for 2015

The demand for the Internet of Things (IoT) devices has led to the introduction of a lot of interesting products.  These IoT devices collect data from all kinds of places: from your home, from your shoes, from your body and from your computer. In many cases, what makes this possible is the innovation of sensors. We [...]

October 21st, 2014|Categories: Sensors, Trends, V2014|Tags: |

Driving Innovation – Internet of Things

There is a massive shift happening in tech, everything is getting connected to the Internet. The convenience and power of the Internet makes these products much more valuable, so clients are rushing to get their IoT (Internet of Things) products to market. They rely on Voler expertise in sensors, wireless communication and data collection technology to [...]

January 15th, 2014|Categories: Data Acquisition, IoT, Sensors, Trends, V2014, Wireless|

Compressed Sensing – The Latest Advances

Recently MIT announced the latest research in compressed sensing that may soon be saving us money for a wide range of imaging and signal-processing applications. Compressed sensing is a new technique in signal processing and imaging that takes a weighted linear combination of samples. Using simple linear equations, these few samples can represent the complete signal. [...]

April 1st, 2013|Categories: Data Acquisition, Sensors, Trends, V2013|Tags: , |

High quality work on Automated External Defibrillator (AED) monitor device

"offered honest advise to ensure the best solution for our needs"

July 30th, 2012|Categories: Customer References, Medical Devices, Sensors|

Voler Helps Out With Legacy Test Equipment

Voler was recently approached by a large medical device company that relied on test equipment that had been designed several years earlier by a firm that was no longer available. They ask Voler for help because for the last two years the equipment would periodically fail calibration and was providing inconsistent results. They had done [...]

January 15th, 2012|Categories: Analog Circuit Design, Medical Devices, Recent Projects, Sensors, Test Systems, V2012|

How to Avoid Big Errors Using Accelerometers

Accelerometers can be used to measure not only acceleration but also vibration. Historically, accelerometers have seen widespread use in manufacturing production lines and automotive electronics. They are now widely used in portable electronic devices such as cell phones, video game controllers, and cameras. Medical devices increasingly incorporate them to add capabilities to measure motion such as the rate and depth of chest compression.

Sensor Calibration Verifies Accuracy

By Walt Maclay

Download CalibrationDisposableMedicalDevices.pdf (reprinted with permission from Embedded Computing Design)

FDA regulations for medical devices require manufacturers to develop and monitor production practices to ensure that the end device conforms to its specifications. A calibration program is a major part of this quality system to verify the accuracy and precision of measurements. Walt describes the techniques, tools, and equipment used to calibrate a disposable medical device.

Medical devices that rely on one or more embedded sensors not only need testing, but also sensor calibration. Digital circuits can be subject to pass/fail testing. However, sensors require precise testing or calibration to be accurate. Calibration ensures that different individual devices give the same result. Sensors needing calibration include temperature, pressure, acceleration, strain, and displacement.