MEMS Inclinometer

SSM7001A Tower Motion Sensor

. Axis: 2 axis
. Range: ±60°
. Accuracy: ±0.1°
. Resolution: ±0.01°

INQUIRY

Features

² Monitoring functions: vertical angle and shaking motion of telecom tower

² RS485 output

² Four alarm thresholds can be set

² Low cost, high stability and reliability

² Outdoor application

² Simple installation, free maintenance

Application

Telecom tower monitoring system

Descriptions

SSM7001A tower motion sensor adapts MEMS accelerometers and gyroscopes with advanced strap-down technology and FFT technology, to on-line monitoring the telecom tower moving status with any harsh working condition. This sensor output:

n Six monitoring data: tower azimuth angle, tilt direction, tilt angle, horizontal deviation displacement(refer to tower vertical position), shaking amplitude and frequency

n Four settable warning thresholds：horizontal deviation displacement, tilt angle, shaking amplitude, shaking frequency.

Principle block diagram of sensor

Measuring Performances

Type	performances	Resolution	Accuracy
input to sensor（Manually）	Tower azimuth angle	0.1°	2°
	Installation height	0.01m	0.1m
	Software version	——	——
	Manufacturer code	——	——
	Equipment model	——	——
Measuring data	Tilt angle（±90°range）	0.01°	0.05°
	Tilt direction angle	0.01°	0.1°
	Horizontal deviation displacement	5mm	2cm
	Shaking amplitude	1cm	5cm
	Shaking frequency	0.1Hz	0.1Hz
Alarm thresholds	Horizontal deviation	cm	1/75×height
	Tilt angle	°	1
	Shaking amplitude	cm	5
	Shaking frequency	Hz	0.5
Alarms	Horizontal deviation warning	——	Alarm 1,Normal 0
	Tilt warning	——	Alarm 1,Normal 0
	Shaking amplitude warning	——	Alarm 1,Normal 0
	Shaking frequency warning	——	Alarm 1,Normal 0

Other performances

Mechanical	Protection	IP67
	Dimensions	90×54×33.5mm
	Housing	Die casting aluminum
	Weight	300g
Electrical	Power supply	9~36VDC
	Power consumption	80mA@24VDC
	Output interface	RS485 Modbus(HEX)
	Connecting	M12-5Pin socket
Environmental	Operation temperature	-40~70℃
	humidity	0~100%RH
	Altitude	＜5000m
Reliability	Storage temperature	-40~85℃
	Shock	3m Fall to concrete floor (excluding connector)
	Vibration	2grms，5~30Hz,half-sine
	EMC	Electrostatic discharge immunity, Surge immunity, Electromagnetic radiation immunity, DC power supply test