Impulse Hammer – Impact Hammer Test – Modal Hammer Test

Impulse hammers are designed for frequency measurement of mechanical structures, such as mechanical flexibility, mechanical damping and impedance.

IH series impulse hammers are powered by an IEPE source, an integrated force transducer is supplied with different hammer tips for different force and frequency ranges.

Model:	IH -01 -1	IH -01	IH -02	IH -05	IH -10	IH -20	IH -50
Sensitivity mV/N	100	25	2.5	1	0.5	0.25	0.1
Measuring Range N	50	200	2000	5000	10000	20000	50000
Nonlinearity %	≤ 1	≤ 1	≤ 1	≤ 1	≤ 1	≤ 1	≤ 1
Resolution mN rms	2	6	50	100	250	450	1000
Resonant Frequency kHz	70	60	55	55	45	45	45
Low Frequency Hz	1	1	1	0.5	0.5	0.5	0.5
Head Weight g	15	28	80	120	445	445	1000
Head Diameter mm	Φ14	Φ18	Φ16	Φ20	Φ32	Φ32	Φ51
Hammer Length mm	125	250	250	250	340	340	400
Output Connector	µDOT	µDOT	BNC	BNC	BNC	BNC	BNC
Price	877 €	899 €	985 €	1130 €	1130 €	1170 €	1220 €

IH-100

The IH-100 impulse hammer is powered by an IEPE source and is supplied with different hammer tips for different force and frequency ranges.

It is suitable for heavy objects such as buildings, bridges and foundations.

Model:	IH -100
Sensitivity mV/N	0.05
Measuring Range N	100 000
Nonlinearity %	≤ 1
Resolution mN rms	5000
Resonant Frequency kHz	25
Low Frequency Hz	0.3
IEPE Voltage	18 – 30 Volt
IEPE Current	2 – 20 mA
Head Weight g	6100
Hammer Mass g	8100
Head Diameter mm	Φ80
Hammer Length mm	1000
Output Connector	BNC

Scope of delivery:

Impact tips: Hard – Medium – Soft
BNC-BNC sensor cable 2 meters
Calibration sheet

The NVH-Imp modal test software offers all functions for experimental modal analysis.

The YouTube presentation shows you how to work with a impact hammer and an vibration sensor.

It is realized with a two-channel measurement data acquisition.

Our modal testing software supports measurement data acquisition from various manufacturers with up to 16 channels.

Here we offer you a complete impulse hammer test set at a particularly attractive price.

Select the right impulse hammer for your application from the table below.

Bump Test Set IH-01

Bump Test Set IH-02

Bump Test Set IH-05

Bump Test Set IH-10

Bump Test Set IH-20

Bump Test Set IH-50

Model:	IH -02
Sensitivity mV/N	2.5
Measuring Range N	2000
Nonlinearity %	≤ 1
Resolution mN rms	50
Resonant Frequency kHz	55
Low Frequency Hz	1
Head Weight g	80
Head Diameter mm	Φ16
Hammer Length mm	250
Output Connector	BNC

Scope of delivery:

Impact tips: Stainless steel, rubber, nylon, aluminum
BNC-BNC sensor cable 2 meters
Calibration sheet
Carrying case

Model:	IH-05
Sensitivity mV/N	1
Measuring Range N	5000
Nonlinearity %	≤ 1
Resolution mN rms	50
Resonant Frequency kHz	55
Low Frequency Hz	1
Head Weight g	80
Head Diameter mm	Φ16
Hammer Length mm	250
Output Connector	BNC

Scope of delivery:

Impact tips: Stainless steel, rubber, nylon, aluminum
BNC-BNC sensor cable 2 meters
Calibration sheet
Carrying case

IH-50

Impulse hammer for heavy objects

The IH-50 impulse hammer is powered by an IEPE source, has an interchangeable force transducer and is supplied with various impact hammer tips for different force and frequency ranges.

Features:

Integrated preamplifier for IEPE sensor supply 2..20mA
Stainless steel hammer head & measuring cell
3 different impact buffers for a wide frequency range
Easy to operate
robust construction
Sensitivity 0.1 mV/N
Maximum force 50000 N
Voltage range + -5V
Frequency range from 0.5 Hz
Head weight 1000 g
Additional mass 500 g
Length 400 mm
Hammer head diameter 51 mm
Aluminum handle with armoured rubber

Scope of delivery:

Impact tips: White-Hard, Black-Medium, Green-Soft
BNC-BNC sensor cable 2 meters
Calibration sheet
Carrying case

IH-01-1

Impulse hammer for light objects

The IH-01-1 impulse hammer is powered using an IEPE source, has a force transducer and is supplied with various impact hammer tips for different force and frequency ranges.

Features:

Integrated preamplifier for IEPE sensor supply 2..20mA
Stainless steel hammer head & measuring cell
3 different impact buffers for a wide frequency range
Easy to operate
robust construction
Sensitivity 100 mV/N
Maximum force 50 N
Voltage range + -5V
Frequency range from 1 Hz
Head weight 15 g
Length 125 mm
Hammer head diameter 14 mm
Aluminum handle with armored rubber
Different impact tips for a wide frequency range
Easy to use
Robust construction

Scope of delivery:

Impact tips: Stainless steel, nylon, aluminum
10-32-BNC sensor cable 2 meters
Calibration sheet
Carrying case

Technical

What do I have to consider in order to perform a correct EXCITATION?

For a correct excitation, the following must be ensured:

Excite the frequency range of interest with high amplitude (above the background noise of the sensor)

An amplitude uniformly distributed over the frequency range to be examined

Enough energy must be generated to excite the entire frequency range of interest, but not significantly beyond. The force must not drop more than 20 dB in the excited frequency range to get a sufficient energy input.

It must be ensured that enough force is induced into the structure to excite the modes of the structures.

A correct excitation should have the following course over the frequency range to be examined:

When do I use which hammer tip for excitation?

The general idea is that resonant frequencies can be more easily identified by applying the same force level over the entire frequency range.

The width of the input force is controlled by the duration of the shock pulse. However, the shorter the duration of the impulse, the wider the frequency range response.

To controll the input force frequency range, you can change the hammer tip in two ways:

Hammer mass – Reducing the mass of the hammer tip causes the hammer to touch the structure for a shorter time. Because the reduced mass allows the hammer to reverse direction more easily after hitting the structure, thus reducing the contact time.

Hammer tip stiffness – Increasing the stiffness of the tip also allows the hammer to shorten the time of contact. For example, a rubber tip could be replaced with a metal tip.

A hard tip has a very short pulse and excites a wide range of frequencies. Whereas a soft tip has a long pulse and excites a narrow frequency range. But the hammer tip itself does not completely determine the excited frequency range. The local flexibility of the structure must also be taken into account.

Generally applies: The lighter the hammer and the stiffer the tip, the higher the excited frequency range.

Choice of tips:

How do I recognize a doublel-hit excitation?

A double hit excitation can often be detected in the time domain as well as in the frequency domain.

If a second peak occurs in the time domain, this is an obvious evidence for a double hit excitation.

If this is not the case, it is possible that the second peak is just too small or too close to the first peak. In this case, the double hit excitation can be detected in the frequency domain.

It shows one of the following significant forms:

What is the effect of a double-hit excitation on the frequency spectrum?

The effect of the double excitation can be calculated from the time interval between the two impacts.

The following chart shows how the inverse of the time interval affects the interference in the frequency band.

Impulse Hammer - Impact Hammer - Modal Hammer

Impulse Hammer Price - Impact Hammer Price - Modal Hammer Price

Modal hammer for heavy objects

Impact Hammer Test Presentation

Structure Amimation Presentation

Impact Hammer Test Kit - Bump Test Vibration Kit