# SENSOR

Bulk Data Entry Defines different types of sensors. Sensors may be used to activate loads.

## Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
SENSOR SID STYPE DELAY NACC
Continuation line if STYPE=TEMP
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
LSID GID LBOUND/LTID UBOUND/UTID
Continuation lines if STYPE=ACCEL (number of continuation lines = NACC)
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
AID1 DIR1 AMIN1 TMIN1
AID2 DIR2 AMIN2 TMIN2
etc. etc.
Continuation line if STYPE=DIST
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
G1 G2 DMIN DMAX
Continuation line if STYPE=SENS, AND, OR
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
SID1 SID2
Continuation line if STYPE=NOT
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
SID1
Continuation line if STYPE=NTER
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
CID
Continuation line if STYPE=RWAL
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
RWID

## Example 1

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
SENSOR 100 ACCEL 1
7 X 500.0 0.03

## Example 2

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
SENSOR 2 TEMP
4 933 100.0 200.0

## Definitions

Field Contents SI Unit Example
SID Unique sensor identification number.

No default (Integer > 0)

STYPE Sensor type. May be one of:
TEMP
Temperature. 1, 10
TIME
Start time - the sensor is activated after the time delay (DELAY).
ACCE
Accelerometer.
DIST
Nodal distance.
SENS
Activation with sensor SID1, deactivation with sensor SID2.
INTER
Interface activation and deactivation.
RWAL
Rigid wall activation and deactivation.
AND
ON if sensors SID1 and SID2 are ON
NOT
ON if sensor SID1 is OFF
OR
ON if sensors SID1 or SID2 is ON

No default

LSID Load set identification number of a QBDY1 or QVOL Bulk Data Entry.

No default (Integer > 0)

GID Grid or scalar point identification number.

No default (Integer > 0)

LBOUND/LTID Lower bound of the temperature range, or the table identification number of a TABLEDi entry which specifies the lower bound as a function of time.

No default (Real or Integer)

UBOUND/UTID Upper bound of the temperature range, or the table identification number of a TABLEDi entry which specifies the upper bound as a function of time.

No default (Real or Integer)

DELAY Time delay.

(Real > 0)

NACC Number of accelerometers ACCEL.

(0 < Integer ≤ 6)

AID# Accelerometer identifier

References the ID of an ACCLR Bulk Data Entry.

(Integer > 0)

DIR# Direction of accelerometer #. May be one of:
X
X direction
Y
Y direction
Z
Z direction
XY
XY plane $\left(\sqrt{{\gamma }_{\text{x}}^{2}+{\gamma }_{\text{y}}^{2}} \right)$
YZ
YZ plane $\left(\sqrt{{\gamma }_{\text{y}}^{2}+{\gamma }_{\text{z}}^{2}} \right)$
ZX
ZX plane $\left(\sqrt{{\gamma }_{\text{z}}^{2}+{\gamma }_{\text{x}}^{2}} \right)$
XYZ
Total acceleration $\left(\sqrt{{\gamma }_{\text{x}}^{2}+{\gamma }_{\text{y}}^{2}+{\gamma }_{\text{z}}^{2}} \right)$

No default

AMIN# Minimum absolute value for acceleration for accelerometer #.

(Real ≥ 0)

TMIN# Minimum duration of AMIN for accelerometer #.

(Real ≥ 0)

G1 Grid ID 1.

(Integer > 0)

G2 Grid ID 2.

(Integer > 0)

DMIN Distance minimum.

(Real ≥ 0)

DMAX Distance maximum.

(Real ≥ 0)

SID1 Activation sensor identifier.

References the ID of another SENSOR Bulk Data Entry.

(Integer > 0)

SID2 Deactivation sensor identifier.

References the ID of another SENSOR Bulk Data Entry.

(Integer > 0)

CID Contact identifier.

References the ID of a CONTACT Bulk Data Entry.

(Integer > 0)

RWID Rigid Wall identifier.

References the ID of a RWALL Bulk Data Entry.

(Integer > 0)

1. A SENSOR can only be activated once. All sensor TYPEs (except TYPE=TEMP) are supported for Explicit Dynamic Analysis (Radioss Integration) for activation of NLOAD1 loads. Sensor with TYPE=TEMP is supported only for Transient (Linear and Nonlinear) Heat Transfer Analysis.
2. For STYPE=ACCE, the sensor is activated if one of the accelerometers gives an acceleration greater than AMIN during a time greater than TMIN.

The time of activation of the sensor is the time at which the above criteria is first met plus the time delay (DELAY).

3. For STYPE=DIST, the sensor is activated once the distance between G1 and G2 moves outside the allowable range (between DMIN and DMAX).

The time of activation of the sensor is the time at which the above criteria is first met, plus the time delay (DELAY).

4. For STYPE=SENS, the sensor is activated once the referenced sensor SID1 is activated. The minimum activation duration is given by the time delay (DELAY). After this minimum activation duration, the sensor is deactivated if referenced sensor SID2 is activated. If there is no SID2 referenced, then the sensor is deactivated after the time delay.
5. For STYPE=AND, the sensor is activated once both the referenced sensors (SID1 and SID2) are activated.
6. For STYPE=OR, the sensor is activated once either of the referenced sensors (SID1 or SID2) are activated.
7. For STYPE=NOT, the sensor is active whenever the referenced sensor SID1 is not active.
8. For STYPE=INTER, the sensor is activated once the referenced contact (CID) is impacted. The sensor is deactivated if there is no impact during a time equal to the time delay (DELAY).
9. For STYPE=RWAL, the sensor is activated once the referenced rigid wall (RWID) is impacted. The sensor is deactivated if there is no impact during a time equal to the time delay (DELAY).
10. The presence of the SENSOR Bulk Data Entry with TYPE=TEMP turns off the referenced LSID loading outside the defined temperature range and turns on the LSID loading inside the temperature range (LBOUND/LTID to UBOUND/UTID).