Vibration Monitoring Instrumentation & Field Practices

ULTRA ENVIRO-SYSTEMS (P) LTD.

New Delhi

ULTRA ENVIRO-SYSTEMS (P) LTD.

 

 Visionary and founder Late Shyam Sunder Sharma started Globe Agencies in 1969 to Sell Support and Service high technological instrumentation in Mining, Atmospheric and Earth Sciences. 

 

We have maintained over the years “High Quality Personalized Sales & After Sales Services to our customers”. 

 

We work in close coordination with customers and our foreign collaborators and principals to offer technological instruments and systems best suited to Indian conditions.

 

We also offer total Indian Solutions using Local Contents, Layouts and Hardware.         

Scientific Rock Blasting means breaking rock using controlled explosive energy in meaningful sizes suitable to the deployed plant &

machinery.  

* Rock Blasting is a fine blend

of Science & Art

* Blaster Artistic Kit

is designed to promote:

a) Enviro-friendly Blasting

b) Quality & Blast optimization  

  c) Blast Data Management

 

 

 

 

 

Overview of the Presentation

• Why use a Vibration Monitor• Vibration Terminology• Configuring your Seismograph• Placement of your Geophone and Microphone• Different type of sensors• Understanding a Seismograph report• Control Blasting Techniques

Why use a Vibration Monitor “Seismograph”

• Document Compliance with established vibration guidelines

• Protect Structures• Minimize risk of damage or annoyance• Protect yourself against claims and lawsuits• Control Blasting and Optimizing Blast using

Vibration Record

Vibration Terminology

• Geophone - The sensor for measuring ground vibrations• Microphone - Sensor used for measuring air blast• Peak Particle Velocity (PPV): - Maximum velocity over the record time on each channel measured in

mm/sec• Air Overpressure - Air pressure wave resulting from the blast is reported in dB(L) for linear

or dB(A) weight• Peak Sound Pressure Level Velocity (PSPL): - Maximum Air over pressure the record time on Microphone channel in

dB(L) as unit of noise.

Configure the Seismograph

Select your Instantel® Monitor:

Blastmate III™ SeismographISEE Linear, A-Weight, or

High Pressure Microphone with windscreen

Sectional Microphone Stand

Storage for sensors, microphone stand, geophone

spikes and accessories

Integrated Thermal Printer

ISEE or DIN Geophone or other supported Sensor (e.g. Hydrophone, Low/High Level Geophones, Accelerometers)

Connectors:Auxiliary Power Geophone Microphone

Water and shock resistant carrying case

Monitor interface:Keypad and LCD

Remote AlarmModem

Breakout BoxWire Trigger

120 VACInternational VAC12 VDC Battery

Car AdaptorSolar Panel

ISEE or DINAccelerometer

High/Low Level GeoBorehole GeoHydrophone

ISEEA-Weight

High Pressure

Why Point the arrow towards the blast?

8 Channel Minimate Plus Monitor

Minimate Pro™ Key FeaturesExpansive Memory and Digital Signal Processing

Water Resistant to IP67

Auxiliry

Easy-to-read, 240x60, backlitinterface display

Rugged Design – Cast Aluminum Case

Remote AlarmModemWire TriggerEthernet Interface

120 VAC12 VDC Input12 VDC BatteryCar AdaptorSolar Panel

ISEE or DIN Geophone

11

Power

RF and EMI Shielding

Smart Sensor Detection with color coded connectors and

matching labels

Recording Types

• Full Waveform (Single shot, continuous, manual)

• Histogram (Histogram)

NOTE: Histogram Combo™ consist of both types of recording.

• Combined bar chart and waveform recording mode

• Record bar chart with 2 sec to 15 min intervals

• Record waveform when trigger level is exceeded

• Graphical monitor log• Capture and identify

anomalies

12

Recording Types (continued)Histogram Combo™

• Combined bar chart and waveform recording mode

• Record bar chart with 2 sec to 15 min intervals

• Record waveform when trigger level is exceeded

• Graphical monitor log• Capture and identify

anomalies

Recording Types (continued)Histogram Combo™

15

Configure the Seismograph

Step 1: Select the Record Mode• Available Record Mode selections:

– Single-Shot– Continuous– Manual– Histogram– Histogram Combo

16

Configure the Seismograph

Step 2: Select the Sample Rate• Available Sample Rates include 1024, 2048 and

4096 With the a Standard Geophone ISEE, a Sample Rate of

1024 samples per second is more than sufficient. With the a Standard Geophone DIN, a Sample Rate of

2048 samples per second is more than sufficient.• In Storage Mode, ensure that the monitor is set

to Save All Data

Step 2: Select the Sample Rate• Available Sample Rates include 1024, 2048 and 4096

With the a Standard Geophone ISEE, a Sample Rate of 1024 samples per second is more than sufficient.

With the a Standard Geophone DIN, a Sample Rate of 2048 samples per second is more than sufficient.

• In Storage Mode, ensure that the monitor is set to Save All Data

Step 3: Set the Maximum Geophone Range

254 mm/s or 31.7 mm/s

17

Configure the Seismograph

Step 4: Select the Trigger Source

Geo/Microphone/Geophone /Microphone

Step 5: Select the Trigger Level Generally a level of <2 mm/s is sufficient for rock

blasting/ construction vibration

18

Configure the Seismograph

Step 6: Set the Record Time (continued) NOTE: Add the blast duration plus 1 second of Record Time

for every 335 m (1100 ft.) between the seismograph and the blast, otherwise you may cut off the recorded event, like the sample shown below:

Configure the Seismograph

21

Configure the SeismographStep 7: Option Notes

Select the Option Notes key to enter site information. NOTE: These are text fields that will appear in the Event

Report if populated.LocationClientUser nameGeneralExtended NotesJob Number

Step 9: Adjust Special Setups• Timer Mode: Select Daily or Off• Daily Self Check: This will enter a line in the Monitor Log, telling the user that the

monitor was functioning properly on the specified date• Sensor Check: Select Before, After or Disable to determine if and when a Sensor

Check will be performed. The results will appear on the Event Report• Units of Measurements: Set the units to either Imperial or Metric

Step 10: Set Time and Date

Placement of Geophoneby Spiking and Burial

Right Wrong

Placement of Geophoneby Bolting or Attachment

Right Wrong

Placement of Geophone by Sandbagging and Microphone Faces Blast

Right Wrong

5 Kg

 

Remote MonitoringNeed to gather data from your site – not looking forward to the two-hour roundtrip? Is your job site hard-to-reach? Or maybe the event results need to be forwarded to several customers, clients or regulatory agencies simultaneously. The solution may be to establish a permanent or semi-permanent monitoring station that can be downloaded using telemetry.Instantel provides the features you need to quickly and easily set up remote monitoring stations and networks. The Instantel® Auto Call Home™ automated call-in feature, allows remote access to your monitor and data. Whenever an event occurs, the monitor automatically places a call to your PC and downloads event data into one central location on your hard disk drive.

Communication can be established using telephone, cellular, GSM or satellite modem connections.Once the files are on your computer, Instantel Blastware™ software enables automatic distribution of data to a wide variety of devices, such as cellular phones, pagers, PDA’s and PCs. You create "accounts" that specify what information will be sent to which recipients the entire event file, or selected data for each channel. You can also send different information to different recipients, or choose to time-delay distribution.

 

                                                                           

Auto Call Home™ feature

No Yes Yes

Packaging Compact Compact Standard

Control Blasting with Scaled Distance Analysis

Regression Line For SETHIA.SDF80% Line Equation: V = 606 * (SD) (̂-1.72)

Coef f icient of Determination = 0.856 Standard Dev iation = 0.0560

1 10 1001

10

100

Square Root Scaled Distance (m/kg 1̂/2)

Pe

ak P

art

icle

Ve

locity (

mm

/s)

 Why Calibration is Important

Calibration is important to ensure the instrument is performing as per designed specification.

 

Although seismographs are designed to be used in a rugged environment, they are still a sophisticated electronic monitoring device. Therefore, preventative maintenance becomes an important part of the annual calibration process.  

Calibrated vibration instrument can prevent legal litigations. 

Different type of sensor

Event Report

FFTReport

Govt. of India Ministry of Labour & Employment Mines Safety Vibration Standards

Type of structures Dominant excitation frequency, Hz

< 8Hz 8-25Hz >25Hz(A) Buildings/structures not belong to the owner readings in mm/s

1. Domestic houses/structures Kuchcha, bricks & Cement 2. Industrial building3. Objects of historical importance & sensitive Structures

5

10 2

10

20 5

15

25 10

(B) Buildings belonging to the owner with limited span of life reading in mm/s

1. Domestic houses/structures2. Industrial buildings

10 15

15 25

20 50

Thanks for your attention

JAGDEEPAK SHARMACHIEF EXECUTIVE ULTRA ENVIRO-SYSTEMS (P) LTDHS-6 KAILASH COLONY MARKETNEW DELHI-110048 INDIAPHONES: 91-11 29245904 FAX: 91-11 41731084Contact: jagdeepak @ultraenviro.com CELL: 098 100 20196  Web: www.ultraenviro.com