Settlement Testing Equipment

Semiconductor Settlement Transmitter is the patented method to measure subsidence by buried semiconductor device into the ground.

-Dont affect ground operation

-Integrate whole measuring equipments in one spot, easy to maintain

-Permanent measurement realized as no risk for loss of transmitter

-High reliability measurement result using semiconductor element(magneto-diode)

Semiconductor Settlement Transmitter is applied to

-Road building and area development construction

-Applied to soft ground requiring continuous subsidence control

-Important structure(Power plant, Plant) :   

  Applied to important structure which subsidence is fatal to structure performance

-A pit mouth of tunnel :    Applied to a pithead of the tunnel and subway intersection area or

  equipment for digging midtown underground.

Semiconductor Settlement Transmitter is excellent in

 -Construction-ability : The installation is simple without the subsequent production process according to banking once Semiconductor Settlement Transmitter is installed.

 -Stability : Compaction is easy because settlement pipe is not exposed on earth up unlike steel settlement plate

  -Accuracy : Provide accurate data measured by precise sensor using semiconductor element which has low measurement tolerance and error.

  -Economical : Save cost by reducing time and manpower to half comparing conventional steel settlement plate

  -Maintenance : Not only measurement during work but maintenance after work is possible and excellent in digitalized data collection

Advantages Steel settlement plate ::

-Construction-ability : Connection of Settlement Pipe required during each banking and possible damage to uncovered upper connection joint by operation or construction vehicles.

-Reliability :Not easy to ensure reliable measurement date due to possible outer breakage on axial point / Measurement tolerance exists caused by level measurement

-Data Collection : Limit in collecting a lot of data in short time as measuring is done by one pair of people with level measuring instrument

-Maintenance : Extra maintenance plan required as subsidence rod  is buried during operation

-Environment Friendly : Scrapped material can cause ground pollution 

-Economical : Adequate for small sized and short term construction

                     Level measuring instrument always requires at least two people

Semiconductor Settlement Transmitter

-Construction-ability : Sensor is not exposed on earth up so no worry about loss by construction vehicle or equipment, and leveling can be done wherever instrument is installed

-Reliability : Enough data can be collected as there is no loss by outer breakage / Reliable data collection is possible as low tolerance by observer or equipment thanks to digitalized data

-Data Collection : One operator can obtain immediate data far from construction area results in optimum data collection in short period / Automated system helps easy data control

-Maintenance : Easy maintenance as using existing measuring system

-Environment Friendly : Save disposal of scrapped steel and prevent ground pollution accordingly

-Economical : Adequate for middle &large sized and long term construction

                     Save labor cost as one can perform measurement all the times

How to install

1. Install point selection and actual measuring from reference point

    -Select install point and measure actual distance from reference point after marking on it by signal pole, etc.

    -Select actual measuring distance as optional point out of influenced(or effective) area

    -Measurement :  Subsidence measured by portable indicating instrument on the spot

Automated manless( unmanned) measuring is possible for permanent measurement on vulnerable area  

2. Passage secure for cable installation : 

   Tube and cable must be installed lower than sand-mat

3. Sensor and tube installation

   -Install tube and cable in slant line along with passage after fixing on subsidence plate

   -Should be installed after covering protective tube with high endurance when expected subsidence is high

4. Protective pipe installation at waterway

   -Crossing waterway requires enough depth and extra protective pipe in order to prevent any possible breakage during digging

5. Reference water tank installation and cable connection

  -Tube and cable should be connected to water tank out of subsidence influence area

  -Datum should be made by measuring initial value after all installations are over

6. Banking

   -Compaction is easy because settlement pipe is not exposed on earth up unlike steel settlement plate.

Semiconductor Settlement Transmitter is made in this method

-Semiconductor Settlement Transmitter lineup :  

 Three major parts; reference water tank, sensor and instruction parts compose     Semiconductor Settlement Transmitter. Two tubes filled with ethyleneglycol and water at 50 to 50 connect reference water tank and sensor part, and sensor part is connected with instruction part by the cable including vent tube to correct atmosphere pressure.

-Subsidence measuring theory : 

Subsidence measured by converting head-pressure variant to location variant with semiconductor element installed at pressure sensor part

-Semiconductor sensor major characteristics  :   

Semiconductor sensor consists of resistor materials (four bridge circuits) inserted into semiconductor and this measures pressure given to semiconductor element and outputs voltage which is proportional to resistor value.

-Output instrument characteristics :   

Output instrument sends resistor variation according to pressure variation to amplifier as voltage output and it is possible to connect any receiver because it is converted and output as international common signals (4~20mA, DC) and subsidence (mm) is shown on data display instrument in real-time.