Impulse Hammer

GKシリーズ

An impact hammer is an excitation hammer with a built-in force sensor, used to measure the natural frequencies of structures and perform modal analysis.

In addition to the general-purpose GK-3100, the GK-2110 is an ultra-compact model weighing 4.8 g, suitable for exciting small, lightweight components, while the GK-4110G20 is a large model weighing 1.1 kg, suitable for exciting automotive white bodies and large structures. Choose the model that best suits your application.

Attach an accelerometer to the object being measured and strike it with the impact hammer. An FFT analyzer can then measure the frequency response function (natural frequency) using the two signals: the excitation force signal from the impact hammer and the response acceleration signal from the accelerometer.

You can also perform modal analysis of the object by importing the resulting frequency response function into modal analysis software (such as MEscope).

Inquiry

With a lightweight mass of 4.8g (when using a plastic handle), it is possible to perform vibration analysis and countermeasures for noise in small cases such as HDDs and thin pipes like those in compressors.
Vibration is possible up to around 20 kHz.

Two types of handles are included: a plastic handle for applying vibration to very light objects, and an aluminum handle that can achieve a large vibration force, allowing you to choose according to your needs.

The hammer mass is 160 g by default, and by attaching the included extender mass, it becomes 235 g, allowing this device to achieve a wide range of excitation forces.
A dedicated sensor amplifier is included.
Four types of impact chips are included as standard. It is possible to change the vibration frequency according to the application.

With a hammer mass of 1.1 kg, it is possible to perform vibration analysis of the machine's framework that affects working precision and excitation for mode analysis of automotive white bodies.
Direct connection to the analyzer is possible due to the built-in constant current drive (CCLD) preamplifier.
Four types of impact chips are included as standard. It is possible to change the vibration frequency according to the application.

	GK-2110	GK-3100	GK-4110G20
Measurement range	220 N	2,200 N	22,000 N
Detection element	piezoelectric crystal element	piezoelectric crystal element	piezoelectric crystal element
Sensitivity	22.5 mV/N ±20%	2.25 mV/N ±15%	0.23 mV/N ±15%
Resonant frequency	above 100 kHz	above 22 kHz	above 12 kHz
Vibration frequency range (when using hard chip)	Up to 20 kHz	Up to 8 kHz	Up to 1 kHz
hammer mass	Approximately 4.8 g ^*2	approximately 160 g	approximately 1,100 g
head diameter	6.3 mm	15.7 mm	51 mm
chip diameter	2.5 mm	6.3 mm	51 mm
hammer length	107 mm^*2	216 mm	370 mm
Output Connector	Aluminum handle (5-44 coaxial) Plastic handle (10-32 miniature connector, cable direct output)	BNC（CO2）	BNC（CO2）
output signal	Constant Current Drive (CCLD) Compatible Voltage Output	Constant Current Drive (CCLD) Compatible Voltage Output	Constant current drive (CCLD) compatible voltage output Compliant with IEEE1451.4:2004 (TEDS) (from Ver.1.0 onwards)
output impedance	below 100 ohms	less than 100 ohms	below 100 ohms
drive power supply	2 to 20 mA, DC 20 to 30 V	2 to 20 mA, DC 20 to 30 V	2 to 20 mA, DC 20 to 30 V
sensor amplifier	Sold separately: SR-2210	Included: Power unit (Sensor amplifier) Sold separately: SR-2210	Sold separately: SR-2210
Cable	Included: GK-0132 (3 m, for aluminum handle)	Included: Signal cable (3 m) Sold separately: GK-0122 (3 m)	Sold separately: MX-100 series
Accessories	storage case ExtendaMas ^*1 Wax 3 red vinyl caps 5-44 ←→ 10-32 cable (3 m) Handle (Aluminum, plastic, 2 pieces) Instruction Manuals Calibration chart	storage case Extender Mas Power Supply Unit (Sensor Amplifier) Hammer cable (BNC 3 m) Signal output cable (BNC 0.9 m) Impact chip set (2 super soft, 2 soft, medium, hard) 2 mounting studs 2 vinyl covers Instruction Manuals Calibration chart	storage case Impact chips (Super soft, soft, medium, hard) Instruction Manuals Calibration chart
Price

*To connect the GK-2110 to a BNC connector, the NP-0021 conversion connector is required.
*The GK-4110G20 does not come with a signal cable.
*The GK-2110 and GK-4110G20 do not come with a sensor amplifier. The following amplifiers can be used.
・SR-2210 2ch sensor amplifier
*1: When using the aluminum handle, be sure to attach the extender mass.
*2: When using the plastic handle