where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

Hillger Ing. Büro
was founded in 1984 and develops special ultrasonic imaging systems for high-tech materials.
647 views
Technical Discussions
N. Y. Kao
N. Y. Kao
09:36 Apr-17-2000
Vibration sensor

Hi,

I am a student undergoing a project 'Heart Rate Monitor'.

I am trying to capture wrist pulse in order to measure the heart rate.

Here are few questions:
1. How to use a vibration sensor?

2. Is it it converts mechanical force into voltage directly? Then i capture the signal using an amplifier?

3. My friend recomend me bi-morph flexure elements. But, how to use it? Any application notes?

Your help is much appreciated.
Thank you!


    
 
 Reply 
 
steve
steve
02:26 May-09-2001
Re: Vibration sensor
Hi,
I'm looking for info on the bi-morph vibration sensors too. So far i've discovered the main issue with these devices is that they like to be connected to high-impedance inputs. 1 to 2 Megohms. "FET input op-amps" are a good starting point.

steve

: Hi,

: I am a student undergoing a project 'Heart Rate Monitor'.

: I am trying to capture wrist pulse in order to measure the heart rate.

: Here are few questions:
: 1. How to use a vibration sensor?

: 2. Is it it converts mechanical force into voltage directly? Then i capture the signal using an amplifier?

: 3. My friend recomend me bi-morph flexure elements. But, how to use it? Any application notes?

: Your help is much appreciated.
: Thank you!




    
 
 Reply 
 
Dr. Patel
R & D, Consultant to Universities/Industries
Fallon Ultrasonics/McMaster University, Canada, Joined May 2001, 20

Dr. Patel

R & D, Consultant to Universities/Industries
Fallon Ultrasonics/McMaster University,
Canada,
Joined May 2001
20
04:52 May-09-2001
Re: Vibration sensor
: Hi,
: I'm looking for info on the bi-morph vibration sensors too. So far i've discovered the main issue with these devices is that they like to be connected to high-impedance inputs. 1 to 2 Megohms. "FET input op-amps" are a good starting point.
.
: steve
.
: : Hi,
.
: : I am a student undergoing a project 'Heart Rate Monitor'.
.
: : I am trying to capture wrist pulse in order to measure the heart rate.
.
: : Here are few questions:
: : 1. How to use a vibration sensor?
.
: : 2. Is it it converts mechanical force into voltage directly? Then i capture the signal using an amplifier?
.
: : 3. My friend recomend me bi-morph flexure elements. But, how to use it? Any application notes?
.
: : Your help is much appreciated.
: : Thank you!
.
Firstly in mechanical enineering they have force sensor which may work. You need a charge amplifiers with high impedance. With bimorphs, the pressure put on wrist may even give you effect. You can try with any low frequency piezo-ceramics with very good charge amplifiers and it may work.

Regards

Dr. Patel


    
 
 Reply 
 
puneet kumar audichya
puneet kumar audichya
02:19 Aug-25-2001
how vibration sensor using the fourier series is use in mechanical machines?
: Hi,

: I am a student undergoing a project ' in skf bearings india LTD.

: I am trying to capture wrist pulse in order to measure the heart rate.

: Here are few questions:
: 1. How to use a vibration sensor?

: 2. Is it it converts mechanical force into voltage directly? Then i capture the signal using an amplifier?


: Your help is much appreciated.

: actually i want to give the seminar in this topic so i do'nt know about more in vibration sensor plz help me as soon as possible?
: Thank you!




    
 
 Reply 
 

Product Spotlight

HARDNESS TESTER TKM-459CE combi

TKM-459CE combi applies 2 methods of hardness control: UCI and Leeb. It provides high-accuracy tes
...
ting of metals and alloys as well as items of different sizes and configurations, their hardened layers and galvanic coatings. Device represents results in HB, HRC, HV and others. Shock-, dust- and water-proof housing with intuitive software make this gauge easy to use in all working conditions.
>

Combination of Digital Image Correlation and Thermographic Measurements

The combination of measuring results from the digital image correlation (ARAMIS, DIC) and temperat
...
ure measuring data from infrared cameras permits the simultaneous analysis of the thermal and mechanical behavior of test specimens in the materials and components testing field.
>

Immersion systems

ScanMaster ultrasonic immersion systems are designed for high throughput, multi shift operation in a
...
n industrial or lab environment. These fully integrated systems provide various scanning configurations and incorporate conventional and phased arrays technologies to support diverse applications, such as inspection of disks, bars, shafts, billets and plates. All of ScanMaster immersion systems are built from high accuracy scanning frames allowing for scanning of complex parts and include a multi-channel ultrasonic instrument with exceptional performance. The systems are approved by all major manufacturers for C-scan inspection of jet engine forged discs. Together with a comprehensive set of software modules these flexible series of systems provide the customer with the best price performance solutions.
>

Research and Applications Development For NDT

The Research and Applications Development (RAD) group is a newly formed team within Acuren dedicat
...
ed to tackling challenging inspection problems. Our focus is the development of novel, field deployable, advanced inspection techniques for use in cases where standard NDT methods are ineffective. We don't wait for new innovations, we engineer them. From concept to commissioning.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window