Ultrasonic Transducer for Bone Density Testing
1.test bone density
2.
1. Application
1.1Design to test Bone Density on the arm.
1.2Frequency : 1.25Mhz
2. Structure
2.1 Appearance: Customized, The design can be provided by clients.
2.2 Connection wire: wire Diagram provided by clients.
2.3 Circuit Schematics: The sensor works without extra inductance & capacitance
2.4 Structures (inside):
Array element: 4pcsEffective Aperture length: 10mmWidth: 3.75mmPZT launch side polarization mark: Positive3. Test Waveform Diagram
Item | Parameters |
Center frequency(Khz) | 1.2475M |
Overall sensitivity | -36.5db min |
Receive Frequency(Khz) | 1.25M |
6db pulse-length | 10.2us |
Bandwidth | -6db 32.3% |
Peak Frequency(Khz) | 1.248M |
Remark: G1.25-410.3.75 Testing date: 2011.03.19 | |
Ref:
Item | Parameters | Test scope | |
Center frequency | -6dB | 1.25MHz | probe |
Relative Bandwidth | -6dB | 37.2% | probe |
Pulse-length | -20db Average | 8.3us | probe |
Sensitivity | Average | -36.5dB | probe |
Deviation | ≤0.5 dB | ||
Electric capacitance | Average | 0.68nf | chip |
Deviation | ≤ 0.02 nf | ||
Crosstalk | ≤-22dB | chip | |
Insulating Strength | AC 4000V,1mA above, cut down and keep1 minute pass | probe | |
4. Test Condition
Indoor Temperature | 25±5°C |
Water Temperature | 25.5±0.5°C |
Reflector | Stainless steel (flat) |
Reflection distance | 30mm |
Pulse transmitter | Item No.: Agilent 33250A |
Setting condition: Frequency 1.25MHz, range 10V incentive single pulse | |
Oscilloscopes | Agilent 54622A |
5. Environmental Requirement (GB9706.1-2007)
5.1 Working conditions:
Environment Temperature | +0°C ~ +50°C |
Relative Humidity | 30%~75% |
Atmospheric pressure | 700Pa~ 1060hPa |
5.2 Storage and transport conditions:
Environment Temperature | -40°C ~ +70°C |
Relative Humidity | 10%~100%, include condensation |
Atmospheric pressure | 500Pa~ 1060hPa |
6. Probe Reliability
Shell defend class IPX7 test | IEC60529: 2001 |
Free drop test | GB9706.1-2007 |
Electromagnetic compatibility | GB9706.1-2007 |
Cable tensile test | GB9706.1-2007 |
Biological safety compatibility | ISO10993-5:1999 ISO10993-10:2002 |
Probe surface temperature | IEC60601-2-37: 2001 |
Thermal Shock Test | Test in high temperature 60°C for 30 minutes: Test in low temperature -10°C 30 minutes; keep testing thermal cycling for 20times |
Immerse the probes into | Immerse into the reagents |
