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DETF

更新时间: 2024-11-30 12:48:19
品牌 Logo 应用领域
STATEK 传感器
页数 文件大小 规格书
1页 479K
描述
Double-Ended Tuning Fork Sensors

DETF 数据手册

  
PRODUCT INFORMATION  
Double-Ended Tuning Fork Sensors  
OVERVIEW  
Statek has designed and manufactured quartz-crystal  
resonators using photolithographic and chemical milling  
methods for over three decades and has applied this  
expertise and capability to now offer double-ended tuning-  
fork (DETF) force-sensors, as shown in Figure 1.  
The resonant frequency of the DETF force-sensor is a  
function of its dimensions, electrode configuration, and the  
applied force. Compression or extension of the sensor  
causes a corresponding change in frequency, as shown in  
Figure 2. Once calibrated, measuring this change in  
frequency gives the applied force.  
Figure 1: A picture of one of Statek’s DETF Force-Sensors  
Because the DETF force-sensors operate on frequency-  
based priniciples, they are immune to amplitude noise as  
well as noise at frequencies other than at the frequency of  
the sensor. As a consequence, the signals in the system can  
operate at full amplitude, thereby avoiding the noise that  
usually plagues low-level measurements.  
0
-20,000  
-40,000  
-60,000  
Quartz force-sensors offer further advantages over other  
force sensing technologies such as sensitivity, small size,  
low mass and stable performance.  
We can customize the size of the sensor to fit your  
application.  
2
dF/F = DP+ EP  
-80,000  
D = 124 ppm/gram  
E = 0.014 ppm/gram2  
FEATURES  
-100,000  
0
100  
200  
300  
400  
500  
600  
700  
800  
Highly sensitive  
Applied Force (P), grams  
Small size  
Figure 2: Example of a corresponding change in frequency by applied  
force.  
Operates based on frequency principles  
High signal-to-noise-ratio  
Low aging  
Designed for customer specific applications  
APPLICATIONS  
Accelerometers, see Figure 3.  
Pressure sensors, see Figure 4.  
Figure 3: Cross-section of one type of accelerometer.  
TECHNICAL PAPERS  
Chuang, Shih S., Force Sensor Using Double-Ended  
Tuning Fork Quartz Crystals, Proceedings of the 37th  
Annual Frequency Control Symposium, 1983, pp. 248-254.  
FURTHER INFORMATION  
We invite you to discuss your custom force sensing  
requirements with us. Call us at (714) 639-7810, or e-mail  
sensors@statek.com.  
Figure 4: Schematic of pressure sensor or scale.  
10186 - Rev A  
STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com  

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