(Suspension Borehole Logging System)

Product description :

ZD16 Self Vibration Borehole Wave Speed Tester is a set of three-channel high-resolution, digital wave speed tester.

ZD16 Self Vibration Borehole Wave Speed Tester is mainly composed of wave speed tester, wave speed detector (abbreviation: probe) 

and special connection cable; wave speed detector is mainly composed of cylindrical metal waterproof and fully sealed electromagnetic 

excitation source, two independent Sealed detector, damping and high-strength soft hose.

Application:

u Field investigation shear wave velocity test

u Field investigation micro-tremor excellence cycle test

u Shear wave and compression wave test for engineering survey;

Applicable standards

Code for Seismic Design of Buildings  GB 50011-2010

Code for Investigation of Geotechnical Engineering  GB 50021-2001

Code for Testing of Dynamic Characteristics of Foundation GB/T 50269-2015

Features:

u 10.4-inch high-definition and high-brightness color touch screen, with special touch pen;

u The acquisition operating system is WinCE 6.0, and the analysis software supports winXP, win7, and win10 systems.

u Data and graphics are saved in * .bmp, * .Excel, * .word formats, and word report formats can be issued;

u Convenient operation, stable performance, industrial-grade motherboard, high signal-to-noise ratio, strong anti-interference ability, adapt to harsh environment；

u Imported chassis, the whole machine is sealed, beautiful and firm, the structure is reasonable, and it has good anti-vibration, moisture-proof, waterproof, dust-proof performance;

u The instrument uses a built-in rechargeable lithium battery, which can continuously complete work for no less than 16 hours, and is equipped with a dedicated charger；

Features:

This instrument adopts the method of exciting in the hole (that is, exciting in the hole, receiving in the hole, no need to tap the vibration source on the ground), you can collect any depth in the hole with a single press on the [Internal Trigger] key. The wave speed related information is automatically processed, and the wave speed value is presented in front of you, which saves you many tedious processes of ground excitation, and also solves the problem of wave speed testing for underwater drilling. 

Working principle:

A method for determining the wave velocity of the formation where the borehole is located by using the arrival time of the S-wave signal from the source received by the geophone placed in the borehole.

In the borehole, the well fluid is used as a coupling agent, and an instantaneous impact force is applied perpendicular to the borehole wall with an electromagnetic shock source. Two types of particle vibration are generated in the borehole formation. One is that the particle vibration direction is perpendicular to the borehole wall , Which propagates along the direction of the borehole, is called S wave (shear wave, shear wave); the other is that the particle vibration direction is the same as the propagation direction and is called P wave (compression wave, longitudinal wave).

The detector receives the S-wave vibration signal and converts it into an electrical signal, and then transmits it to the computer. After the computer processes the signal, the computer uses two cross-correlation analysis methods to automatically calculate the time difference 

between the S-wave propagation between the two detectors. Find out the S-wave propagation speed between the two channels.

Technical Parameters:

Standard configuration:

Acquisition interface:

Analysis interface:

Engineering case:

           Guangzhou Baiyun Airport subway wave speed test site

                      Kunming High Speed Rail Station

                                                Maldives