Capacitive sensors: design and applications
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
New York, NY
IEEE Press
1997
|
| Schriftenreihe: | IEEE Press series on electronics technology
|
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | XIV, 302 S. Ill., graph. Darst. |
| ISBN: | 0780311302 |
Internformat
MARC
| LEADER | 00000nam a2200000 c 4500 | ||
|---|---|---|---|
| 001 | BV011148494 | ||
| 003 | DE-604 | ||
| 005 | 19970303 | ||
| 007 | t | ||
| 008 | 970115s1997 ad|| |||| 00||| engod | ||
| 020 | |a 0780311302 |9 0-7803-1130-2 | ||
| 035 | |a (OCoLC)34544983 | ||
| 035 | |a (DE-599)BVBBV011148494 | ||
| 040 | |a DE-604 |b ger |e rakddb | ||
| 041 | 0 | |a eng | |
| 049 | |a DE-91 | ||
| 050 | 0 | |a TK7870 | |
| 082 | 0 | |a 621.37/42 |2 20 | |
| 084 | |a MSR 055f |2 stub | ||
| 100 | 1 | |a Baxter, Larry K. |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Capacitive sensors |b design and applications |c Larry K. Baxter |
| 264 | 1 | |a New York, NY |b IEEE Press |c 1997 | |
| 300 | |a XIV, 302 S. |b Ill., graph. Darst. | ||
| 336 | |b txt |2 rdacontent | ||
| 337 | |b n |2 rdamedia | ||
| 338 | |b nc |2 rdacarrier | ||
| 490 | 0 | |a IEEE Press series on electronics technology | |
| 650 | 7 | |a Capteurs (technologie) |2 ram | |
| 650 | 7 | |a Électronique - Instruments - Conception et construction |2 ram | |
| 650 | 4 | |a Capacitance meters |x Design and construction | |
| 650 | 4 | |a Electronic instruments |x Design and construction | |
| 650 | 0 | 7 | |a Kapazitiver Sensor |0 (DE-588)4209035-0 |2 gnd |9 rswk-swf |
| 689 | 0 | 0 | |a Kapazitiver Sensor |0 (DE-588)4209035-0 |D s |
| 689 | 0 | |5 DE-604 | |
| 856 | 4 | 2 | |m HEBIS Datenaustausch |q application/pdf |u http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=007472674&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |3 Inhaltsverzeichnis |
| 999 | |a oai:aleph.bib-bvb.de:BVB01-007472674 | ||
Datensatz im Suchindex
| _version_ | 1804125642183147520 |
|---|---|
| adam_text | Contents
Preface xiii
Basics
Chapter 1—Introduction 1
Sensor trends 1
Market 1
Technology 2
Integration 2
Intelligence 3
Sensor bus 3
Applications of capacitive sensors 3
Proximity sensing 3
Measurement 4
Switches 4
Communications 5
Computer graphic input 5
Chapter 2—Electrostatics 6
Approximations 6
Charges and fields 7
Coulomb’s law 7
Conduction and displacement current 9
Induced charge 11
Superposition 11
Charge images 12
Capacitance 13
Calculating Capacitance 14
Multielectrode capacitors 17
v
vi Contents
Analytical solutions 20
Effect of Gap Width 20
Planar Geometries 21
Cylindrical Geometry 23
Approximate solutions 24
Sketching field lines 24
Teledeltos paper 25
Finite element analysis 27
FEA plot 28
Fringe fields 29
Crosstalk 31
Moving shield 34
Proximity detector 35
Chapter 3—Capacitive sensor basics 37
Basic electrode configuration 37
Motion sensing plate configurations 38
Spacing variation 38
Area variation 39
Matching the circuit to the sensor 40
Spacing variation with low-Z amplifier 40
Spacing variation with high-Z amplifier 41
Area variation with low-Z amplifier 42
Area variation with high-Z amplifier 43
Area variation with feedback amplifier 44
Electrode configuration table 45
Limits to precision 46
Noise 46
Stability 46
Chapter 4—Circuit basics 48
Linearity 48
Measuring capacitance 49
Circuit comparison 49
Direct DC 51
Oscillator 51
Synchronous demodulator 54
Amplifiers 54
High-Z amplifier 54
Low-Z amplifier 56
Feedback amplifier 55
DC restoration 56
Single-ended circuits 57
Bridge circuits 57
Wheatstone bridge 57
Capacitance bridge 57
Bridge vs single-ended 58
Excitation 58
Contents
vii
Sine wave 58
Square wave 59
Filtering 59
Lowpass filter 59
Bandpass filter 60
Applications
Chapter 5—Capacitive micrometers 61
Circuits 62
Two-plate micrometer 62
Three-plate micrometer 63
Circuit comparison 65
Chapter 6—Proximity detectors 66
Applications 66
Technology 67
Inductive sensors 67
Magnetic sensors 68
Optical sensors 68
Ultrasonic sensors 68
Capacitive proximity detectors 69
Limits of proximity detection 71
Maximum detection range 72
Proximity sensing equivalent circuit 74
Stray fields 75
Phase detectors 76
Capacitive limit switches 78
Vanes 78
Limit switch circuits 80
Chapter 7—Motion encoders 83
Applications 83
Absolute 83
Incremental 83
Technology 84
Capacitive motion encoders 86
Electric potential sensors 87
Alternate ways to generate a linear electric field 88
Convolution 92
The convolution integral 92
Sampled data convolution 93
Examples of inverse convolution 95
Rectangular to polar conversion 98
Plate geometry 99
Spacing change effects 100
Wireless coupling 103
Chapter 8—Multiple plate systems 105
Capacitive multiple plate systems 105
viii Contents
Rotary encoders 106
Multiple plate counting 109
Debounce 110
Tracking circuits 112
Tracking algorithms 113
Three-phase drive 113
Plate construction 113
Printed circuit board techniques 113
Other techniques 115
Dielectric substrate 118
Chapter 9—Miscellaneous sensors 122
Pressure sensors 122
Differential pressure transducer 122
Absolute pressure sensors 123
Silicon pressure sensors 123
3 cm linear transducer 124
Linear multiplate motion sensor 127
Motor commutator 129
Commutation 129
Ripple torque 129
Water/oil mixture probe 131
Simple probe 132
Improved probe 133
Touch switch 134
Keypad 135
CMOS and ESD 136
Keypad software 137
Touchpad 138
Sensing Technique 138
Accurate two-dimensional sensor 139
Spacing measurement 139
Liquid level sense 140
Dielectric liquids 140
Conductive liquids 141
Low-Z amplifier 142
Liquid level switch 143
Six-axis transducer 144
Demodulator 145
Clinometers 145
Design
Chapter 10—Circuits and components 147
Capacitor dielectrics 147
Classical dielectric models 147
Modified dielectric model 148
Other dielectrics 150
Contents
ix
Capacitor measurement 152
Capacitor models 152
Bridges 153
Pickup amplifiers 154
High-Z amplifier 154
Rise time effects 159
Discrete amplifiers 160
Low-Z amplifier 162
Feedback amplifier 164
Wireless connection 165
Noise performance 167
Circuit noise 168
Components 169
Operational amplifiers 169
Resistors 121
Carrier 171
Demodulators 173
180° drive circuits 173
90° drive circuits 175
Chapter 11—Switched capacitor techniques 177
Alternate design techniques 177
Digital signal processing 177
Charge coupled devices, bucket brigade devices 178
Packaged switched capacitor filters 178
Component accuracy 179
MOS vs bipolar processes 179
BiCMOS process 180
MOS vs discrete component accuracy 180
Sampled signals 181
Filters 182
Lowpass filter, RC 183
Lowpass filter, switched capacitor 184
Integrator 185
Instrumentation amplifier 186
Demodulator 187
Switched capacitor circuit components 188
Switch 188
Operational amplifiers 189
Accuracy 191
Capacitor ratios 191
Amplifier accuracy 191
Parasitics 191
Charge injection 192
Balanced differential-input demodulator 193
Alternate balanced demodulator 195
X
Contents
Chapter 12—Noise and stability 197
Noise types 197
Resistor noise 199
FET noise 200
High-impedance amplifier 204
Limiting displacement 205
Limiting displacement of three-plate micrometer 205
Maximizing limiting displacement 206
Shielding 207
Grounding 209
Ideal ground 209
Stability 211
Temperature 211
Stability with time 212
Stability with humidity 213
Chapter 13—Hazards 214
Leakage 214
Guarding against leakage 214
Static discharge 217
To combat static discharge 217
Static charge 219
Crosstalk in silicon circuits 219
Products
Chapter 14—Electret microphone 221
Electret microphone construction 221
Equivalent circuit 223
Miller capacitance 224
Chapter 15—Accelerometer 226
Accelerometer design 226
Surface micromachining vs bulk micromachining 226
Force balance 227
Capacitive feedback in silicon accelerometers 228
ADXL50 228
Chapter 16—StudSensor 231
Block diagram 232
Circuit diagram 232
Low cost display 233
Increased sensitivity 233
Self calibration 234
Modified circuit diagram 234
Chapter 17—Proximity detector 236
Block diagram 236
Lossy capacitance 236
Construction 237
Carrier 238
Contents xi
Schematic 239
Excitation 239
Input amplifier 239
Demodulator 240
Power supply 241
Noise and stability 241
Performance 242
Chapter 18—Vernier caliper 243
6 in caliper 243
Circuit description 246
CMOS ASIC 247
Problems 248
Chapter 19—Graphic input tablet 250
Specifications 250
Generating the electric field 250
One dimension 250
Two dimensions, resistive sheet 251
Potentiometer wire 253
Pickup 253
Reverse sensing 254
Excitation 255
Demodulation 255
Chapter 20—Camera positioner 257
Specifications 258
Motor 258
DC brush motor 260
DC brushless motors 261
Permanent magnet step motors 261
Hybrid step motors 262
Transmission 262
Servo system 263
Chapter 21—Digital level 265
Specifications 266
Sensor 266
Sensor construction 269
Circuit description 270
Calibration 270
Chapter 22—References 271
Appendix 1—Capacitive sensors in silicon technology 279
Appendix 2—Dielectric properties of various materials 287
|
| any_adam_object | 1 |
| author | Baxter, Larry K. |
| author_facet | Baxter, Larry K. |
| author_role | aut |
| author_sort | Baxter, Larry K. |
| author_variant | l k b lk lkb |
| building | Verbundindex |
| bvnumber | BV011148494 |
| callnumber-first | T - Technology |
| callnumber-label | TK7870 |
| callnumber-raw | TK7870 |
| callnumber-search | TK7870 |
| callnumber-sort | TK 47870 |
| callnumber-subject | TK - Electrical and Nuclear Engineering |
| classification_tum | MSR 055f |
| ctrlnum | (OCoLC)34544983 (DE-599)BVBBV011148494 |
| dewey-full | 621.37/42 |
| dewey-hundreds | 600 - Technology (Applied sciences) |
| dewey-ones | 621 - Applied physics |
| dewey-raw | 621.37/42 |
| dewey-search | 621.37/42 |
| dewey-sort | 3621.37 242 |
| dewey-tens | 620 - Engineering and allied operations |
| discipline | Elektrotechnik / Elektronik / Nachrichtentechnik Mess-/Steuerungs-/Regelungs-/Automatisierungstechnik |
| format | Book |
| fullrecord | <?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01508nam a2200397 c 4500</leader><controlfield tag="001">BV011148494</controlfield><controlfield tag="003">DE-604</controlfield><controlfield tag="005">19970303 </controlfield><controlfield tag="007">t</controlfield><controlfield tag="008">970115s1997 ad|| |||| 00||| engod</controlfield><datafield tag="020" ind1=" " ind2=" "><subfield code="a">0780311302</subfield><subfield code="9">0-7803-1130-2</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(OCoLC)34544983</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)BVBBV011148494</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-604</subfield><subfield code="b">ger</subfield><subfield code="e">rakddb</subfield></datafield><datafield tag="041" ind1="0" ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="049" ind1=" " ind2=" "><subfield code="a">DE-91</subfield></datafield><datafield tag="050" ind1=" " ind2="0"><subfield code="a">TK7870</subfield></datafield><datafield tag="082" ind1="0" ind2=" "><subfield code="a">621.37/42</subfield><subfield code="2">20</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">MSR 055f</subfield><subfield code="2">stub</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Baxter, Larry K.</subfield><subfield code="e">Verfasser</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Capacitive sensors</subfield><subfield code="b">design and applications</subfield><subfield code="c">Larry K. Baxter</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="a">New York, NY</subfield><subfield code="b">IEEE Press</subfield><subfield code="c">1997</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">XIV, 302 S.</subfield><subfield code="b">Ill., graph. Darst.</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="b">n</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="b">nc</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="490" ind1="0" ind2=" "><subfield code="a">IEEE Press series on electronics technology</subfield></datafield><datafield tag="650" ind1=" " ind2="7"><subfield code="a">Capteurs (technologie)</subfield><subfield code="2">ram</subfield></datafield><datafield tag="650" ind1=" " ind2="7"><subfield code="a">Électronique - Instruments - Conception et construction</subfield><subfield code="2">ram</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Capacitance meters</subfield><subfield code="x">Design and construction</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Electronic instruments</subfield><subfield code="x">Design and construction</subfield></datafield><datafield tag="650" ind1="0" ind2="7"><subfield code="a">Kapazitiver Sensor</subfield><subfield code="0">(DE-588)4209035-0</subfield><subfield code="2">gnd</subfield><subfield code="9">rswk-swf</subfield></datafield><datafield tag="689" ind1="0" ind2="0"><subfield code="a">Kapazitiver Sensor</subfield><subfield code="0">(DE-588)4209035-0</subfield><subfield code="D">s</subfield></datafield><datafield tag="689" ind1="0" ind2=" "><subfield code="5">DE-604</subfield></datafield><datafield tag="856" ind1="4" ind2="2"><subfield code="m">HEBIS Datenaustausch</subfield><subfield code="q">application/pdf</subfield><subfield code="u">http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=007472674&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA</subfield><subfield code="3">Inhaltsverzeichnis</subfield></datafield><datafield tag="999" ind1=" " ind2=" "><subfield code="a">oai:aleph.bib-bvb.de:BVB01-007472674</subfield></datafield></record></collection> |
| id | DE-604.BV011148494 |
| illustrated | Illustrated |
| indexdate | 2024-07-09T18:04:48Z |
| institution | BVB |
| isbn | 0780311302 |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-007472674 |
| oclc_num | 34544983 |
| open_access_boolean | |
| owner | DE-91 DE-BY-TUM |
| owner_facet | DE-91 DE-BY-TUM |
| physical | XIV, 302 S. Ill., graph. Darst. |
| publishDate | 1997 |
| publishDateSearch | 1997 |
| publishDateSort | 1997 |
| publisher | IEEE Press |
| record_format | marc |
| series2 | IEEE Press series on electronics technology |
| spelling | Baxter, Larry K. Verfasser aut Capacitive sensors design and applications Larry K. Baxter New York, NY IEEE Press 1997 XIV, 302 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier IEEE Press series on electronics technology Capteurs (technologie) ram Électronique - Instruments - Conception et construction ram Capacitance meters Design and construction Electronic instruments Design and construction Kapazitiver Sensor (DE-588)4209035-0 gnd rswk-swf Kapazitiver Sensor (DE-588)4209035-0 s DE-604 HEBIS Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=007472674&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Baxter, Larry K. Capacitive sensors design and applications Capteurs (technologie) ram Électronique - Instruments - Conception et construction ram Capacitance meters Design and construction Electronic instruments Design and construction Kapazitiver Sensor (DE-588)4209035-0 gnd |
| subject_GND | (DE-588)4209035-0 |
| title | Capacitive sensors design and applications |
| title_auth | Capacitive sensors design and applications |
| title_exact_search | Capacitive sensors design and applications |
| title_full | Capacitive sensors design and applications Larry K. Baxter |
| title_fullStr | Capacitive sensors design and applications Larry K. Baxter |
| title_full_unstemmed | Capacitive sensors design and applications Larry K. Baxter |
| title_short | Capacitive sensors |
| title_sort | capacitive sensors design and applications |
| title_sub | design and applications |
| topic | Capteurs (technologie) ram Électronique - Instruments - Conception et construction ram Capacitance meters Design and construction Electronic instruments Design and construction Kapazitiver Sensor (DE-588)4209035-0 gnd |
| topic_facet | Capteurs (technologie) Électronique - Instruments - Conception et construction Capacitance meters Design and construction Electronic instruments Design and construction Kapazitiver Sensor |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=007472674&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| work_keys_str_mv | AT baxterlarryk capacitivesensorsdesignandapplications |