Measurement-computing WaveBook rev.3.0 Manuel d'utilisateur Page 45
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WaveBook User’s Manual WBK Expansion Options, WBK14 3-13
WaveView and Module Configuration Windows
Accelerometer Tutorial
A low-impedance piezoelectric accelerometer consists of a piezoelectric crystal and an electronic amplifier.
When stretched or compressed, the two crystal surfaces develop a charge variation that is related to the
amount of stress, shock, or vibration on the crystal. The amplifier outputs a corresponding signal and
transforms the sensor’s high impedance to a lower output impedance of a few hundred ohms. Besides
acceleration, such sensors can measure pressure and force.
The circuit requires only 2 wires (coax or twisted pair) to transmit both power and signal. At low
impedance, the system is insensitive to external or “triboelectric” cable noise. Cable length does not affect
sensitivity.
The figure shows a simple sensor-WBK14 connection. The voltage developed across R is applied to the
gate of the MOSFET. The MOSFET is powered from a constant current source of 2 or 4 mA and 27 volts.
Crystal
MOSFET
Sensor
Sensor to WBK14
Coaxial Cable
C
30 VDC
Power
R
GND
Amplifier
Input
Bias
Voltage
WBK14
-
+
Constant
Current
(2 or 4 mA)
Accelerometer Circuit
- WaveBook 1
- How To Use This Manual 5
- Table of Contents 6
- 6 - PostView 7
- 7 - Calibration 7
- 8 - Theory of Operation 7
- 9 – Troubleshooting 7
- Appendices 7
- Desktop PC with WBK21 ISA/EPP 9
- DB25M Connector “ 9
- (links to LPT/EPP on host PC) 9
- 2. Connect Signals 10
- 3. Connect Power 11
- 4. Install Software 11
- 5. Test your System 12
- QS-6 Quick Start 14
- WaveBook Overview 1 15
- WaveBook Features 16
- WaveBook Overview 1-3 17
- 1-4 WaveBook Overview 18
- WaveBook Overview 1-5 19
- Software Overview 20
- WaveView Configuration Window 21
- Programming Environments 22
- Hardware Setup Notes 23
- 2-2 WaveBook Setup 24
- WaveBook Setup 2-3 25
- Optional Printer Connection 26
- System Testing 28
- WaveBook Setup 2-7 29
- 2-8 WaveBook Setup 30
- WaveBook Setup 2-9 31
- 2-10 WaveBook Setup 32
- Dust Cap 33
- Shielded 33
- BNC Connector 33
- WBK10/10H - Expansion Modules 34
- Hardware SetupConfiguration 35
- CAUTIONCAUTION 35
- DBK34 Vehicle UPS Module 36
- Software Setup 37
- WBK11 Block Dia 38
- Description 40
- Hardware Setup 40
- Accelerometer Tutorial 45
- WBK15 Board Layout 50
- 5B Module Insertion/Removal 50
- WARNINGWARNING 51
- WBK16 - Strain-Gage Module 54
- WBK16 Fan 56
- Kelvin-Type Excitation Leads 57
- Soldering Resistors to 58
- Adapter Plug 58
- B,D, or F Shunt 61
- WBK16 Si 64
- Power 65
- Channel Values Tab 72
- Column Display Description 72
- WBK30 Block Diagram 77
- WBK30 – Specifications 80
- WBK61/62 Block Diagram 81
- System Power & Assembly 4 85
- DIN5 Power Pinout 87
- 14 VDC Mode (default) 88
- 28 VDC Mode 89
- Charging DBK30A’s Batteries 90
- DBK34 - Vehicle UPS Module 91
- +24V/+12V 92
- Stacking Modules 94
- WaveView 5 95
- Startup WaveView 96
- Configure Channels 97
- Configure Acquisition 98
- Collect Data 99
- Store Data ( 100
- Menu Items & Buttons 100
- Performance 102
- Data Files 102
- Memory Module 102
- Input Channel Configuration 103
- WaveBook User’s Manual 104
- 5-10 WaveView 104
- Acquisition Configuration 105
- Multiple Ch Analog 106
- Digital Pattern 106
- WaveView 5-13 107
- Pulse Trigger Selected 108
- WaveView Scope Window 109
- Scope Display 111
- Data Destination Area 113
- 5-20 WaveView 114
- PostView 6 115
- Hours: mins: seconds. Tenths 116
- Time stamp can be relative or 116
- Starting PostView 117
- PostView Toolbar Items 118
- Channel Information Region 119
- Menu Items 120
- Chart Setup Wizard 122
- Automatic Display Creation 123
- Display Configuration 124
- Adding Channel 2 to Chart 1 125
- Manually Creating a Display 126
- Adding a Chart to Group 1 127
- PostView Timebase 129
- Calibration 7 131
- 7-2 Calibration 132
- Performing System Calibration 133
- Manual Calibration 134
- Theory of Operation 8 135
- Acquisition Steps 136
- Theory of Operation 8-3 137
- Start the Acquisition 138
- Stop the Acquisition 138
- Shut Down WaveBook 138
- Signal Processing 139
- 8-6 Theory of Operation 140
- WaveBook/516 141
- Acquisition Operation 142
- Scan Composition 143
- Scan Period 143
- Trigger Operation 144
- Multi-Channel Trigger 146
- Theory of Operation 8-13 147
- Pre/Post-Trigger Acquisition 149
- Data Processing 150
- Data Transfer 151
- Theory of Operation 8-19 153
- Theory of Operation 8-21 155
- Troubleshooting 9 157
- Overview 158
- Driver Support 158
- Connection Problems 158
- 32-Bit WaveView Issues 159
- Windows NT V3.51 159
- Windows 95/98 Problems 159
- 9-4 Troubleshooting 160
- Troubleshooting 9-5 161
- 9-6 Troubleshooting 162
- Accessories 163
- : ±1 LSB max 164
- Wavebook/516 Specifications 165
- PGA Filter 166
- Triggering 166
- External Clock 166
- Sequencer 166
- General Specifications 167
- Optional Accessories 167
- DBK30A - Specifications 168
- DBK34 - Specifications 168
- WBK10/10H - Specifications 168
- WBK11 - Specifications 168
- WBK12/13 - Specifications 169
- WBK14 - Specifications 169
- WBK15 - Specifications 170
- WBK16 - Specifications 170
- WBK20/20A - Specifications 170
- WBK21 - Specifications 170
- WBK30 - Specifications 171
- WBK61/62 - Specifications 171
- Abbreviations 172
- Appendix B B 173
- Introduction 175
- Data Acquisition Environment 175
- Basic Models 176
- Background Acquisition 186
- Complex Triggering 187
- Data Packing & Rotating 189
- Direct-to-Disk Transfers 191
- Finally, close the device: 195
- 6-22-99 196
- Commands 199
- DaqAdcSetDataFormat 206
- API Reference Tables 227
- ADC Miscellaneous Definitions 229
- WBK Card Definitions 230
- Response DAC on WaveBook 231
- WaveBook User's Manual 235
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