5
The fourth sensor is the rotational speed sensor of the
drill rod and the drill bit. The sensor is an inductive speed
sensor which detects metallic surfaces from a pulse gen-
erator. The sensor is mounted on the protective cover of
the rotating linkage clamp. A plastic ring fitted with metal
blades was attached to the rotating ring as an impulse gen-
erator. Experiments with the use of various existing metal-
lic flanks did not produce a useful signal. Figure 4 shows
the sensor and the white plastic ring with the internal
metal plates.
The fifth sensor is the hydraulic fluid temperature sen-
sor. The temperature is measured at the return inlet of the
hydraulic pump. The sensor is in direct contact with the
fluid for instantaneous measurement. Figure 5 shows the
temperature sensor connected to the hydraulic circuit.
Measurement System—Data Analysis
The last chapter described the different sensors and how to
attach them to the drill. All sensors have an analog or digital
interface that is electronically processed. A minicomputer
serves as the central element for the underground evalua-
tion. It synchronously combines all measured data, stores a
backup file of all data, displays real-time data on the screen,
and sends all data in real-time of the cloud in the Mine.io
ecosystem.
Figure 2. Sandvik DE110 with installed acceleration sensors.
(Friedemann, 2024)
Figure 3. Sandvik DE110 control unit with installed
hydraulic pressure sensors. (Friedemann, 2024)
Figure 4. Sandvik DE110 rotation unit with installed
rotational speed sensor and the pulse generator.
(Friedemann, 2024)
Figure 5. Sandvik DE110 power unit with installed
temperature sensor. (Friedemann, 2024)
The fourth sensor is the rotational speed sensor of the
drill rod and the drill bit. The sensor is an inductive speed
sensor which detects metallic surfaces from a pulse gen-
erator. The sensor is mounted on the protective cover of
the rotating linkage clamp. A plastic ring fitted with metal
blades was attached to the rotating ring as an impulse gen-
erator. Experiments with the use of various existing metal-
lic flanks did not produce a useful signal. Figure 4 shows
the sensor and the white plastic ring with the internal
metal plates.
The fifth sensor is the hydraulic fluid temperature sen-
sor. The temperature is measured at the return inlet of the
hydraulic pump. The sensor is in direct contact with the
fluid for instantaneous measurement. Figure 5 shows the
temperature sensor connected to the hydraulic circuit.
Measurement System—Data Analysis
The last chapter described the different sensors and how to
attach them to the drill. All sensors have an analog or digital
interface that is electronically processed. A minicomputer
serves as the central element for the underground evalua-
tion. It synchronously combines all measured data, stores a
backup file of all data, displays real-time data on the screen,
and sends all data in real-time of the cloud in the Mine.io
ecosystem.
Figure 2. Sandvik DE110 with installed acceleration sensors.
(Friedemann, 2024)
Figure 3. Sandvik DE110 control unit with installed
hydraulic pressure sensors. (Friedemann, 2024)
Figure 4. Sandvik DE110 rotation unit with installed
rotational speed sensor and the pulse generator.
(Friedemann, 2024)
Figure 5. Sandvik DE110 power unit with installed
temperature sensor. (Friedemann, 2024)