LPMS-INC1 Hardware Manual
LPMS-INC1 is a high-precision, high-stability dual-axis inclinometer based on MEMS sensors. It offers a measurement range of ±90°, a resolution of less than 0.001°, and an accuracy of up to 0.011°. The operating temperature range is -20 to 85 °C. By integrating and processing data from its built-in accelerometer, and applying filtering and calibration algorithms, the device digitally outputs various data including raw acceleration, calibrated acceleration, tilt angles, and temperature.
Communication Options: To suit different applications, LPMS-INC1 provides four communication interfaces: RS232, CAN, RS485, or TTL.
Key Features:
High-precision, high-stability dual-axis inclinometer based on MEMS sensors
Measurement range: ±90°
Resolution: <0.001° (IEEE 32-bit single-precision floating-point format)
Accuracy: 0.011°
Operating temperature range: -20 to 85 °C
Supply voltage: 5 to 36 V
Real-time output: raw acceleration data, calibrated acceleration data, tilt angle data, temperature data, up to 500Hz output frequency
Communication interfaces: RS232, CAN, RS485, or TTL
Applications:
Construction machinery
Energy and power systems
Bridge and building structures
System Overview
System Architecture
Pinout Description
Pin | Type | Name | Function | Color |
1 | Power Supply | VIN | +5V~36V | White |
2 | GND | Ground | Brown | |
3 | RS232/CAN/RS485/TTL | 232T/CAN_H/B/Tx | Sensor Transmit | Green |
4 | 232R/CAN_L/A/Rx | Sensor Receive | Yellow | |
5 | - | RES | Reserved | Gray |
6 | USB | D- | USB D- | Pink |
7 | D+ | USB D+ | Blue | |
8 | - | EN | Sensor Enable | Red |
Please note that TTL, RS232 and CAN Bus pins are mutually exclusive. Only one communication interface is enabled depending on the model. Communication interfaces for different LPMS-U3 models are listed below:
Model | Communication Interface | ||||
USB | RS232 | CAN | RS485 | TTL | |
LPMS-INC1-RS232 | △ | ✓ | × | × | × |
LPMS-INC1-CAN | △ | × | ✓ | × | × |
LPMS-INC1-RS485 | △ | × | × | ✓ | × |
LPMS-INC1-TTL | △ | × | × | × | ✓ |
△: Optional
Default settings for communication interface:
USB: USBXpress, convertible to virtual COM port,921600bps,8N1
RS232, TTL: 921600bps,8N1
CAN: 500kbps, termination resistor: disabled by default (Can be enabled upon request).
RS485: 115200bps, 8N1
Reference System
Coordinates
The coordinate system for LPMS-INC1 is defined as follows:
Accelerometer output convention
A positive acceleration output will be produced when the sensor is accelerated at the same direction of the positive axes. When the sensor is at rest with Z axis pointing upwards, the calibrated output of the accelerometer is expected to be [0 0 +1g] indicating the acceleration due to the force of gravity.
Euler output convention
Euler output is in degree. Euler X and Y represents angle between X/Y axis and horizontal. LPMS-INC1 does not output yaw angle.
Range of euler output is as follow:
X Angle: -90° ~ +90°
Y Angle: -90° ~ +90°
Z Angle: -
Specifications
Main Parameters
Parameter | Condition | Value | Units | ||
|---|---|---|---|---|---|
Min. | Typ. | Max | |||
Power supply |
| 5 | 12 | 36 | V |
Current consumption |
| 8 | 20 | 37 | mA |
Dimension |
|
| 74 x 40 x 28.5 |
| mm |
Weight |
|
| ~184 |
| g |
Measurement range | X Axis |
| ±90 |
| deg |
Y Axis |
| ±90 |
| deg | |
Resolution | Float32 Output |
| <0.001 |
| deg |
Accuracy | RMS |
| 0.011 |
| deg |
Power consumption | RS232 |
| 0.24 |
| W |
CAN |
| 0.3 |
| W | |
Output frequency |
| 5 | 100 | 500 | Hz |
Operating temperature |
| -20 | 25 | 85 | °C |
Output data type | Raw and calibrated accelerometer data / Euler angle / Temperature | ||||
Connector | M12 A-coded 8 pin Male | ||||
Accelerometer Parameters
Parameter | Condition | Value | Units | ||
|---|---|---|---|---|---|
Min. | Typ. | Max | |||
Zero Offset Error | -40°C ... +125°C | -20 |
| 20 | mg |
Offset temperature drift | -40°C ... +125°C | -10 |
| 10 | mg |
-40°C ... +125°C | -15 |
| 15 | mg | |
Sensitivity | At room temperature |
| 12000 |
| LSB/g |
Linearity Error |
| -4 |
| 4 | mg |
Integrated Noise | X, Z |
| 0.08 |
| mg RMS |
Y |
| 0.06 |
| mg RMS | |
Noise Density | X, Z |
| 20 |
| μg/√Hz |
Y |
| 15 |
| μg/√Hz | |
Cross-Axis Sensitivity |
| -1.5 | ±0.2 | 1.5 | % |
Power consumption
| Current (mA @Room Temperature) | |
|---|---|---|
Input Voltage (V) | RS232 | CAN |
5 | 37 | 38 |
12 | 20 | 25 |
24 | 9 | 11 |
36 | 8 | 7 |
Packaging details