Tilt Sensors SOLID STATE, LOW RANGE, ANALOG SERIES ▼ Small, Low-Cost, Rugged ▼ Vibration Resistant ▼ ± 20° Range, 100 mV/O output ▼ Fully Conditioned Analog Outputs Applications ▼ Scissor Lifts ▼ Static Platforms ▼ Alignment Systems ▼ Laser Leveling tilt sensors ▼ CXTLA01, CXTLA02 The CXTLA single and dual axis analog tilt sensors offer resolution, accuracy, and fast response in an inexpensive, easy-to-use package. The CXTLA series design centers on a highly stable silicon micro-machined capacitive inclination sensor element. The CXTLA series is fully signal conditioned with high level analog output(s), and optional analog temperature signal. Micro-machined devices, perfected in automotive safety applications, offer several distinct advantages over fluid, electrolytic, and pendulum-based sensors. Like other solid-state devices, they are more reliable than their mechanical counterparts. In a package smaller than many pendulum or fluid sensing elements, completely integrated electronics eliminate the need for external components. Unlike other micro-machined devices, the CXTLA Series maintains its accuracy and stability over temperature: < 25° of arc over the range 0° to 70° C. The output can be user corrected for temperature with the T option, yielding accuracy to within ± 0.5° over the angular range. A typical configuration using CXTLA sensors is shown below. Each module is factory calibrated, tested and includes a calibration sheet. The module can be securely attached using screws or adhesive. The CXTLA is available in a standard nylon or high temperature aluminum package. 8-30V GND CXTLA02 Power Supply Xout Yout A/D Converter Temp (optional) Typical CXTLA02 Configuration Micromachined Tilt Sensor Element ▼ 2 Document Part Number: 6103-0014 c r o s s b o w t e c h n o l o g y, i n c ▼ 41 daggett drive ▼ san jose, ca 95134-2109 * C Specifications ± 20 CXTLA02 Remarks 0.03 100 ± 10 0.01 2.5 ± 0.15 3 0.03 < 0.4 6 ±1 <5 ± 20 0.03 100 ± 10 0.01 2.5 ± 0.15 3 0.03 < 0.4 6 ±1 <5 -55 to +85 -40 to +85 -55 to +105 -40 to +105 10 2000 -55 to +85 -40 to +85 -55 to +105 -40 to +105 10 2000 Nylon Package Nylon Package -AL High Temperature Package -AL High Temperature Package 20-2 kHz random 1 ms, half sine 8 - 30 4 8 - 30 8 Unregulated ø Actual value provided with Sensor -1 Actual value provided with Sensor Typical Typical Over ± 20O not including Arcsine Error Typical Inclusive of alignment error Figure 1 .75 x 1.875 x 1.00” (1.91 x 4.763 x 2.54 cm) .95 x 2.00 x 1.20“ (2.41 x 5.08 x 3.05 cm) 1.38 oz (43 gm) 2.09 oz (65 gm) tilt sensors Performance Angular Range (°) Angular Resolution (° rms) Sensitivity - small angles (mV/O) Sensitivity Drift (%/OC) Zero Angle Voltage (Volts) Zero Angle Drift (mV/OC) Zero Angle Drift (O/OC) Non-Linearity (°) Bandwidth (Hz) Alignment (°) Cross-axis Sensitivity (%) Environment Storage Temperature ( OC) Operating Temperature (OC) Storage Temperature (OC) Operating Temperature (OC) Non-Operating Vibration (g rms) Shock (g) Electrical Supply Voltage (VDC) Current (mA) Physical Size (Nylon Package) (Aluminum Package) Weight (Nylon Package) (Aluminum Package) CXTLA01 Specifications subject to change without notice Principle of Operation The CXTLA Series Tilt Sensors use a micro-machined acceleration sensing element with a DC response to measure inclination relative to gravity. The response of the tilt sensor depends on the magnitude of gravity parallel to the sensor element. The output of the tilt sensor will be an offset voltage plus the voltage response proportional to the amount of gravity measured by the sensor. Using the CXTLA Sensor proportional to the sine of the tilt angle. Accurately measuring tilt angle involves solving the equation shown in the bottom of Figure 1. Clearly to solve this equation the Zero Angle Voltage and Sensitivity must be determined prior to use. Crossbow provides this information on a calibration sheet with its CXTLA products. The 180/π factor changes the angle from radians to degrees. When the tilt angle is less than 20°, the error from linear approximation will be less than 1%. This is convenient when you don’t have or want the computing power to calculate an inverse sine function. For angles less than 20°, the sine function can be approximated by a linear relationship between the Vout and the tilt angle in radians. Thus the equation for angle in degrees is: Pin Color 1 2 3 4 5 Function Red Black White Yellow Green Power Ground Pitch Roll Temp Pin Diagram The voltage response of the CXTLA is 180/π * [(Vout - Zero Angle Voltage)/Sensitivity] Ordering Information Model Axes CXTLA01 CXTLA02 X X,Y OPTIONS -T -AL Full Range Resolution ± 20º ± 20º 0.03º 0.03º Temperature Sensor Internal High Temperature Aluminum Package CALL FACTORY FOR OTHER CONFIGURATIONS If ordering options, please specify Model followed by the regulator option and then the package option, e.g. Optional Aluminum Package Document Part Number: 6103-0014 phone: 408.965.3300 ▼ fax: 408.324.4840 ▼ e-mail: [email protected] ▼ w e b : w w w. x b o w. c o m ▼ 3