MULTIPLE ROD EXTENSOMETER – MPBX
YieldPoint recognizes that in many mining situation fast deployment of an ungrouted borehole extensometer is advantageous. The d-MPBX is a unique 1 to 6-Point Multiple Point Borehole eXtensometer (MPBX) based on a single rod design. The anchors are fitted with stainless steel extension springs that secure the instrument in a 38-50mm borehole. The d-MPBX incorporates digital signal processing to result in dramatically improved accuracy compared to similar priced existing technology.
Design features of the d-MPBX involves a stiff hermetically sealed and potted central core that includes all of the electronics. The anchors are a simple aluminum tube to which are attached extension springs that positively attach the anchor to the borehole wall. The inherently digital nature of the signals eliminates the necessity for expensive analog-to-digital conversion and results in low cost readout unit that reads data directly in real world units (mm and °C). The signals themselves are robust and can be transmitted over 500m of lead-wire. If broken the lead-wire can be twisted and taped together. The sensor output is an ASCII (9600,8,N,1) digital signal which can be read by a low cost readout unit (d-Reader), dataloggers (BluLink and BluLogger), and wirelessly networked (BluGateway) for transmission to cloud based servers. The signals themselves are robust and can be transmitted over 500m of lead-wire. If broken the lead-wire can be twisted and taped together.
| Brands | Yieldpoint |
|---|---|
| Dimensions | Up to 6 Anchor points over lengths up to 30m |
| Disp. Range | 125, 150 (standard), 200 and 250mm. |
| Disp. Accuracy | typically 0.5% F.S(10m). |
| Temp. range | -40 to 125 °C |
| Output Signal | RS485 with transmission up to 500m over 2 x tp. |
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