CA2575082A1 - Self reflective lasers acceleration sensor - Google Patents
Self reflective lasers acceleration sensor Download PDFInfo
- Publication number
- CA2575082A1 CA2575082A1 CA 2575082 CA2575082A CA2575082A1 CA 2575082 A1 CA2575082 A1 CA 2575082A1 CA 2575082 CA2575082 CA 2575082 CA 2575082 A CA2575082 A CA 2575082A CA 2575082 A1 CA2575082 A1 CA 2575082A1
- Authority
- CA
- Canada
- Prior art keywords
- item
- laser
- mirror
- sensor
- self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/50—Systems of measurement based on relative movement of target
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
- G01P15/093—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by photoelectric pick-up
Abstract
The invention pertains generally to sensor area. The sensor is composed of self-mixed laser generator with laser interference detector (item 2), mirror (item 4) and case (item 1). It main feature is the laser beam is transmitted and reflected back by the built-in mirror(item 4). There is no movement between the self-mixed laser (item 2) and the mirror(item 4). The laser beam is not transmitted out of the sensor case (item 1). The mirror is a concave mirror.
The concave mirror will focus the reflected laser (item 5) because the transmitted one (item 3) is scattered.
The concave mirror will focus the reflected laser (item 5) because the transmitted one (item 3) is scattered.
Description
Page 1 of3 Self Reflective Lasers Acceleration Sensor DESCRIPTION
Field of the invention Ref to figure one, this invention pertains generally to sensor area. The sensor is composed of self-mixed laser generator with laser interference detector (item 2), mirror (item 4) and case (item 1).
Background information and prior art The current acceleration sensor is designed by the interference created by the transmitted laser and its reflected one. The reflected beam is reflected back by the moving object. Like the two eyes laser sensor from Philip semiconductor, the laser beam is transmitted to the related moving object and reflected back, then the two beams mixed together and create the fringe. The fringe detector detects the fringe shift when there is acceleration.
Page 1 of 3 Page 2 of 3 Advantage and disadvantage Compared with the current sensor, this invention will give the good acceleration measurement. The laser is not transmitted out of the sensor.
There is not moving part. The sensor can work in bad environment. Its precision is very high. It can detect 1 micrometer difference.
Its disadvantage is that it need high coherent laser and mixer to detector the small phase change.
Application The laser acceleration sensor can be used on Anti-Lock Brake System, vibration measurement, speed and distance measurement. Since the reference is the light, so the 3 dimension sensor can be designed.
Detail Description Ref to figure one, the invention pertains generally to sensor area. The sensor is composed of self-mixed laser generator with laser interference detector (item 2), mirror (item 4) and case (item 1).
Page 2 of 3 Page 3 of 3 The laser generator is embedded with the interference meter. It works as the same as the Michael laser interference meter. The high coherent laser is required. After the laser is reflected back, it will be interference with the transmitted beam, then the interference fringe will be created. When the reflected beam phase is changed by the acceleration, the fringe will shift.
The detector will detect the movement for acceleration.
The mirror is used to reflect the laser back to laser generator. The mirror is concave mirror, the scatted laser need to be refocused. But there is not relative movement between mirror and the laser generator. The laser beam can not be accelerated, but the mirror can be accelerated, so there is some movement between the laser beam and the mirror, the mirror will change the phase of the reflected laser, which is detected by the interference meter.
Component assembly The acceleration sensor is installed as the same direction of the laser beam.
Page 3 of 3
Field of the invention Ref to figure one, this invention pertains generally to sensor area. The sensor is composed of self-mixed laser generator with laser interference detector (item 2), mirror (item 4) and case (item 1).
Background information and prior art The current acceleration sensor is designed by the interference created by the transmitted laser and its reflected one. The reflected beam is reflected back by the moving object. Like the two eyes laser sensor from Philip semiconductor, the laser beam is transmitted to the related moving object and reflected back, then the two beams mixed together and create the fringe. The fringe detector detects the fringe shift when there is acceleration.
Page 1 of 3 Page 2 of 3 Advantage and disadvantage Compared with the current sensor, this invention will give the good acceleration measurement. The laser is not transmitted out of the sensor.
There is not moving part. The sensor can work in bad environment. Its precision is very high. It can detect 1 micrometer difference.
Its disadvantage is that it need high coherent laser and mixer to detector the small phase change.
Application The laser acceleration sensor can be used on Anti-Lock Brake System, vibration measurement, speed and distance measurement. Since the reference is the light, so the 3 dimension sensor can be designed.
Detail Description Ref to figure one, the invention pertains generally to sensor area. The sensor is composed of self-mixed laser generator with laser interference detector (item 2), mirror (item 4) and case (item 1).
Page 2 of 3 Page 3 of 3 The laser generator is embedded with the interference meter. It works as the same as the Michael laser interference meter. The high coherent laser is required. After the laser is reflected back, it will be interference with the transmitted beam, then the interference fringe will be created. When the reflected beam phase is changed by the acceleration, the fringe will shift.
The detector will detect the movement for acceleration.
The mirror is used to reflect the laser back to laser generator. The mirror is concave mirror, the scatted laser need to be refocused. But there is not relative movement between mirror and the laser generator. The laser beam can not be accelerated, but the mirror can be accelerated, so there is some movement between the laser beam and the mirror, the mirror will change the phase of the reflected laser, which is detected by the interference meter.
Component assembly The acceleration sensor is installed as the same direction of the laser beam.
Page 3 of 3
Claims (2)
1. The invention pertains generally to sensor area. The sensor is composed of a self-mixed laser generator with interference detector (item 2), mirror (item 4) and case (item 1). It main feature is the laser beam is transmitted and reflected back by the built-in mirror (item 4) to measure the acceleration. There is no movement between the self-mixed laser (item 2) and the mirror (item 4) during acceleration. The laser beam is not transmitted out of the sensor case (item 1). The mirror (item 4) can be accelerated with sensor but the laser beam can not be accelerated. When the sensor is accelerated, the laser path is changed, the phase between the transmitted beam (item 3) and the reflected beam (item 5) will be changed by the acceleration and detected by the interference detector in the self-mixed laser (item 2).
2. The second feature is that the mirror is a concave mirror.
The concave mirror will focus the reflected laser (item 5) because the transmitted one (item 3) is scattered.
The concave mirror will focus the reflected laser (item 5) because the transmitted one (item 3) is scattered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2575082 CA2575082A1 (en) | 2007-01-22 | 2007-01-22 | Self reflective lasers acceleration sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2575082 CA2575082A1 (en) | 2007-01-22 | 2007-01-22 | Self reflective lasers acceleration sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2575082A1 true CA2575082A1 (en) | 2008-07-22 |
Family
ID=39642801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2575082 Abandoned CA2575082A1 (en) | 2007-01-22 | 2007-01-22 | Self reflective lasers acceleration sensor |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2575082A1 (en) |
-
2007
- 2007-01-22 CA CA 2575082 patent/CA2575082A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |