Internal Sensors

Light Sensor

The Senquip ORB is equipped with an internal light sensor that is used to activate the ORB setup functions when the lid is opened and to detect tamper attempts. The light sensor is sampled on a regular basis and does not have an associated measurement interval.

An alert can be generated when the ORB detects light, meaning that the lid has been opened.

Note

A tamper alert, if enabled will be triggered by a tamper attempt or an authorised entry to change settings.

A full list of light sensor settings is given in the table at the end of the chapter.

Accelerometer

The Senquip ORB has an integrated 3-axis accelerometer. The accelerometer allows for angle measurement, movement detection, harsh-usage monitoring and utilisation calculation. To provide more accurate measurement for pitch, roll and angle measurement, each time the accelerometer is measured, 10 samples will be taken at 1 msec intervals and the average will be returned as the measured value. Pitch, roll and angle will be calculated from the average acceleration.

Raw accelerometer data in the X (through the lid), Y (left to right across the ORB lid) and Z (from the hinge down to the cable gland) are available and are delivered in G’s. These values can be useful, for instance where an incident is being re-created from force data.

Note

Incident recreation using force data requires high speed sampling. Please contact Senquip to discuss your application.

When looking at the front cover, positive pitch is described as the top of the ORB tilting towards the observer. In the same scenario, negative pitch is described as the top of the ORB cover moving away from the observer.

Definition of pitch

Definition of pitch

When looking at the front cover, positive roll is described as the top of the ORB tilting towards the right. In the same scenario, negative roll is described as the top of the ORB cover moving towards the left.

Definition of roll

Definition of roll

Pitch and roll are useful in applications where objects to which the ORB is attached have a definite front, back, left and right; for instance a vehicle. For objects like a pole, the user may be more interested in the angle of the pole to vertical. In these applications, the tilt may be more useful than pitch or roll.

Definition of tilt

Definition of tilt

Specification

Parameter

Specification

G-force range

+- 16G

Resolution

1mG

Sensitivity change vs temperature

0.1% per°C

Typical zero-g level offset accuracy

+- 40mG

Tilt resolution

0.1 deg

Tilt accuracy (0-45 deg)

1.0 deg

Tilt accuracy (45-90 deg)

2.0 deg

Settings

Accelerometer measurements can be scheduled as a multiple of the base-interval. The fastest possible measurement rate is achieved by setting the interval to 1 in which case measurements will occur on every base interval. To reduce power consumption, the measurement rate can be turned down by increasing the interval.

Warning and alarm thresholds for pitch, roll and angle can be enabled. Once enabled, each time a measurement is completed, the returned value will be compared with minimum and maximum warning and alarm thresholds. If a warning or alarm level is breached, a message will immediately be transmitted. As long as the warning or alarm condition persists, messages will be transmitted at the exception-interval rather than the transmit-interval. Hysteresis can be specified in 1 degree increments, to prevent multiple alarms in the presence of vibration.

The accelerometer is able to detect motion and shocks due to harsh usage even during sleep. If motion or shock monitoring is enabled and either of those events occurs, a flag will be set. Event flags are checked at each base-interval and if one exists, an alert message can be scheduled to be sent at that time. The threshold as well as time for which an activity must be present can be set for both motion and shock monitoring.

Note

Pitch and roll warning and alarm levels can be positive or negative. Angle warning and alarms can only be positive.

Vibration can be used as a trigger to count hours. This may be useful where the number of hours that an engine is running needs to be calculated.

A full list of accelerometer settings is given in the table at the end of the chapter.

Pressure Sensor

The ORB contains a built-in pressure sensor for measuring atmospheric pressure and short term height change. Although the enclosure is rated to IP67, an integrated moisture resistant gore-vent allows internal and external pressure to equalise, meaning accurate atmospheric pressure measurement.

Specification

Parameter

Specification

Pressure range

300 - 1100 hPa

Temperature range

-40 to 85°C

Absolute accuracy (0 to 65 deg C)

+-1hPa

Relative accuracy (25 to 40 deg C)

+-0.12hPa, equivalent to +-1m altitude

Absolute maximum pressure

20,000hPa

Settings

Measurements can be scheduled as a multiple of the base-interval. The fastest possible measurement rate is achieved by setting the interval to 1 in which case measurements will occur on every base interval. To reduce power consumption, the measurement rate can be turned down by increasing the interval.

Warning and alarm thresholds for pressure can be enabled. Once enabled, each time a measurement is completed, the returned value will be compared with minimum and maximum warning and alarm thresholds. If a warning or alarm level is breached, a message will immediately be transmitted. As long as the warning or alarm condition persists, messages will be transmitted at the exception-interval rather than the transmit-interval. Hysteresis can be specified in 1 kPa increments, to prevent multiple alarms in the presence of fluctuating pressure, for instance due to wind.

A full list of pressure sensor settings is given in the table at the end of the chapter.

Temperature sensor

An integrated temperature sensor allows for measurement of ambient temperature. Please be aware that the temperature sensor will measure the temperature inside the ORB enclosure; this temperature can be subject to fluctuations, for example when the internal lithium ion battery is charging and so the environment within the ORB heats up. For accurate external temperature measurement or to measure a wider range of temperatures, use the thermocouple peripheral.

Specification

Parameter

Specification

Measurement range

-40 - 85°C

Resolution

0.01 deg°C

Absolute accuracy (25°C)

+-0.5 deg°C

Absolute accuracy (0 - 65°C)

+-1 deg°C

Settings

Measurements can be scheduled as a multiple of the base-interval. The fastest possible measurement rate is achieved by setting the interval to 1 in which case measurements will occur on every base interval. To reduce power consumption, the measurement rate can be turned down by increasing the interval.

Warning and alarm thresholds for ambient temperature can be enabled. Once enabled, each time a measurement is completed, the returned value will be compared with minimum and maximum warning and alarm thresholds. If a warning or alarm level is breached, a message will immediately be transmitted. As long as the warning or alarm condition persists, messages will be transmitted at the exception-interval rather than the transmit-interval. Hysteresis can be specified in 1°C increments, to prevent multiple alarms in the presence of fluctuating temperature.

A full list of temperature sensor settings is given in the table at the end of the chapter.

GPS

Models of the ORB that have 4G LTE connectivity also have an integrated Global Positioning System (GPS). The GPS receiver, with integrated antenna and LNA allows for position and speed based reporting. The internal GPS will receive GPS, GLONASS, BeiDou and Galileo satellites to ensure high accuracy measurement and fast time to first fix. Data available from the GPS includes:

  • Latitude, longitude and height

  • Speed (km/h) and bearing

  • Date and time

  • Number satellites being tracked

In order to utilise the GPS, the ORB needs to be mounted such that the internal antenna has visibility of the sky. Plastic and fibreglass roof sheeting will have a minimal effect on GPS performance whereas reinforced concrete and metal roofs will render the GPS inoperable. In applications where GPS is required but the ORB cannot be mounted in a position where the sky is visible, a GPS re-radiating antenna can be used. Please make sure that the chosen re-radiating antenna is of high quality and legal for use in your region. An advantage of good GPS signal quality is that the ORB will consume less power as acquisition time will be less.

Specification

Parameter

Specification

Time to first fix from power up

Typically 60 seconds

Position update rate

Maximum 1Hz

Horizontal position accuracy

Typically +-5m (<2.5m CEP-50)

Vertical position accuracy

Typically +-20m

Horizontal speed accuracy

1km/h

Settings

Measurements can be scheduled as a multiple of the base-interval. The fastest possible measurement rate is achieved by setting the interval to 1 in which case measurements will occur on every base interval. To reduce power consumption, the measurement rate can be turned down by increasing the interval. The GPS is a high power peripheral and so use should be limited when running on battery power.

GPS alert description

GPS alert parameters

The GPS can create an alert based on position and speed. A known position (expected latitude and expected longitude) can be specified and if the ORB moves a particular radius from that point, an alert can be raised. Hysteresis can be specified in 1 meter increments to prevent multiple alerts, for instance as a boat swings on a mooring near the edge of the allowed radius. Likewise, a maximum speed can be specified and if the ORB exceeds that speed, an alert will also be raised. Speed hysteresis can be specified in 1km/h increments, to prevent multiple alerts as the speed fluctuates at the alert point. The time that GPS speed exceeds 2km/h can counted and be used to calculate machine utilisation.

Note

In the example above, the ORB could also report bilge water level, solar battery voltage and a host of other parameters associated with the yacht.

A full list of GPS settings is given in the table at the end of the chapter.

Bluetooth Interface

The ORB has a Bluetooth peripheral that can transmit and receive Bluetooth Low Energy (BLE) advertising packets. BLE beacons typically use the advertising packets to communicate measured data such as temperatures, voltages, movement, and battery voltage. BLE tags are a special type of beacon that typically only contain identification information and are used to locate items. BLE beacons send advertising messages at different rates. Some report every second and some may be every minute or more. Battery operated BLE devices tend to send at lower rates to save power. Some BLE device are smart and will slow their send rate if they are not being used. A tire pressure monitoring device may stop sending if the tire is not rotating. Typical protocols used in advertising packets include Eddystone and iBeacon. The ORB supports both.

The BLE beacons from ELA shown below enable identification, and measurement of temperature, humidity, voltage, switch position, and more.

Selection of BLE beacons

Example BLE beacons from ELA

The ORB will report the beacon address, data, and the strength of the received signal.

  • The address (or identifier) is unique and allows individual tags to be recognised.

  • The data may contain battery voltage, temperature, humidity, or any other data being conveyed by the beacon.

  • The receive signal strength (RSSI) gives an indication of how strong the signal from the beacon is.

For details on using the ORB as a BLE beacon to transmit custom advertising packets, please refer to the Senquip Scripting Guide.

Note

The BLE module and Wi-Fi module share a common radio. BLE operation will work best when the ORB is operated using a cellular network rather than Wi-Fi.

Specification

Parameter

Specification

Bluetooth version

4.2

Settings

Measurements can be scheduled as a multiple of the base-interval. The fastest possible measurement rate is achieved by setting the interval to 1 in which case the Bluetooth peripheral will be sampled on every base interval. To reduce power consumption, the measurement rate can be turned down by increasing the interval.

When active, the Bluetooth peripheral will scan for all advertising packets. In a typical environment, phones, computers, and other devices are all advertising. The ORB Bluetooth peripheral could easily report a dozen Bluetooth devices even when the one you are searching for is off. The ORB can filter for only the required Bluetooth devices by filling in the Address Capture List. Required addresses should be entered in hexadecimal and should be separated by commas. When the ORB wakes for the next measurement interval, the Bluetooth peripheral will be sampled until all the messages listed have been found or the Capture Time has been reached. If multiple messages with the same identifier are required in a single measurement interval, place a * followed by the number of messages of that identifier to be returned after the identifier in the list. For example: 98588A10375E*4, 98588a103777, 98588a103888*10 will return 98588A10375E four times, 98588a103777 once and 98588a103888 ten times. Leave the ID Capture List blank to receive all messages.

The Capture Time setting can be used to set a timeout after which the Bluetooth peripheral will stop listening, allowing the ORB to transmit received messages and return to sleep. Capture-time can be used as a mechanism to allow the ORB to sample the environment for devices for a defined time-period.

A full list of Bluetooth settings is given in the table at the end of this chapter.

Internal Sensor Settings

A full list of settings for internal sensors is given in the table below.

Name

Item

Function

Range

Unit

Internal Reference

Light Sensor

Name

text

A name for the light sensor that is meaningful to the user.

25 chars

tamper.name

Tamper Alert

boolean

This parameter determines if an alert is generated when the light sensor detects light or not.

tamper.enable

Ambient Temperature

Name

text

A name for the input that is meaningful to the user.

25 chars

ambient.name

Interval

integer

The number of base intervals after which the temperature is sampled. A value of 1 means that the input is collected every base interval. Set to 0 to disable.

0 to 10000

ambient.interval

Hysteresis

decimal

The amount by which the measured value has to drop below the threshold to re-enable the alert after an event.

0 to 100

°C

ambient.hysteresis

Warning

text

Warning thresholds. Refer to user guide.

-40 to 100

°C

ambient.warning

Alarm

text

Alarm thresholds. Refer to user guide.

-40 to 100

°C

ambient.alarm

Accelerometer

Name

text

A name for the input that is meaningful to the user.

25 chars

accel.name

Interval

integer

The number of base intervals after which the accelerometer is sampled. A value of 1 means that the input is collected every base interval. Set to 0 to disable.

0 to 10000

accel.interval

Output XYZ Vectors

boolean

Send X,Y,Z gravity vectors in data output.

accel.outputxyz

Hysteresis

decimal

The amount by which the pitch, roll or angle has to exceed a threshold before triggering alarms or warnings.

0 to 20

Degrees

accel.hysteresis

Pitch Warning

text

Warning thresholds. Refer to user guide.

-90 to 90

Degrees

accel.pitch.warning

Pitch Alarm

text

Alarm thresholds. Refer to user guide.

-90 to 90

Degrees

accel.pitch.alarm

Roll Warning

text

Warning thresholds. Refer to user guide.

-90 to 90

Degrees

accel.roll.warning

Roll Alarm

text

Alarm thresholds. Refer to user guide.

-90 to 90

Degrees

accel.roll.alarm

Angle Warning

text

Warning thresholds. Refer to user guide.

0 to 90

Degrees

accel.angle.warning

Angle Alarm

text

Alarm thresholds. Refer to user guide.

0 to 90

Degrees

accel.angle.alarm

Motion Warning

text

Warning thresholds. Refer to user guide.

0 to 5000

milli-g

accel.motion.warning

Motion Alarm

text

Alarm thresholds. Refer to user guide.

0 to 5000

milli-g

accel.motion.alarm

Wake from Hibernate

boolean

The high warning motion threshold is used to wake the device when hibernating.

accel.motion.wake_from_hibernate

Motion Wake Threshold

decimal

The motion threshold above which the device will wake from hibernation.

1 to 2000

milli-g

accel.motion.wake_threshold

Count Motion Hours

boolean

Counts the number of hours the device exceeds the Motion Wake Threshold. Typically used as an machinery work vs idle hour meter.

accel.motion.count_hours

GPS

Name

text

A name for the GPS signal that is meaningful to the user.

25 chars

gps.name

Interval

integer

The number of base intervals after which the gps is sampled. A value of 1 means that the input is collected every base interval. Set to 0 to disable.

0 to 10000

gps.interval

Max Time

integer

Maximum time the device will wait for a valid GPS fix.

0 to 3600

Seconds

gps.maxtime

Position

Position Alert

boolean

Sets whether a change in position generates an alert.

gps.position.alert.enable

Radius

integer

An alert will be raised if the device moves further than this value from the expected position.

1 to 10000

Meters

gps.position.alert.radius

Hysteresis

integer

Once the alert is active or inactive, the radius must change by this value to change the alert state.

1 to 10000

Meters

gps.position.alert.hysteresis

Expected Latitude

decimal

Latitude at which the device is expected to be.

-90 to 90

Degrees

gps.position.alert.lat

Expected Longitude

decimal

Longitude at which the device is expected to be.

-180 to 180

Degrees

gps.position.alert.lon

Speed

Count Movement Hours

boolean

Counts the number of hours the device is moving according to the GPS speed.

gps.speed.count_hours

Speed Alert

boolean

Sets whether a change in speed generates an alert.

gps.speed.alert.enable

Threshold

integer

An alert will be raised if the device’s speed goes above this threshold.

1 to 1000

km/h

gps.speed.alert.threshold

Hysteresis

integer

Once the alert is active or inactive, the speed must change by this value to change the alert state.

1 to 1000

km/h

gps.speed.alert.hysteresis

Bluetooth

Name

text

A name that is meaningful to the user.

25 chars

ble.name

Interval

integer

The number of base intervals after which the CAN module is turned on. Set to 0 to disable.

0 to 10000

ble.interval

Capture Time

integer

The device will capture matching messages for this length of time.

Seconds

ble.capture_time

ID Capture List

text

List of IDs to be captured in HEX format, separated by a comma. Leave blank to capture all.

200 chars

ble.id_list