Page Comparison

laser

https://www.youtube.com/watch?v=2b-BE5c-cg4&ab_channel=MTIInstruments%2CInc.

using the Hall effect

2 pole sn magnetic disk is fixed on the actuator shaft

its position is detected by an ic sensor aligned to it with a small air gap between the magnet and the sensor

this is used to measure the

angular position of a moving element by using a magnetic field instead of a physical brush or wiper

use a magnetically biased Hall-effect integrated circuit ic that senses the rotary movement of the actuator shaft over a set operating range

no moving contact so wear is eliminated

each Hall-effect sensor has a power supply and output terminal filter capacitor

the pedal circuit contains two independent Hall-effect sensor ics with filter capacitors at each of the power supply terminals and at each of the output terminals. the filter capacitors enhance and improve the immunity to electrical noise

the rotation of the actuator shaft changes the magnet’s position relative to the ic and the resulting flux density changes. it is converted to a linear output.

inductive type

• consists of a sensor and activator

• the activator is typically made of

• mild steel and

• is mounted to or machined into the moving part of the application

• the sensor monitors the position of the activator as it moves across the sensor face

• this is a three-step process

1. it generates a magnetic field

1. that penetrates the activator. this causes it to produce its own opposite field

2. the next coil stop generating its magnetic field and measures the activators induced field

3. the measurements are compared across the series of coils to calculate an absolute position of the activator

• unaffected by the presence of permanent magnets

https://www.gillsc.com/applications/throttle-pedal-position-sensor-f1-racing-team/

• they literally have this but i guess it is for gas and not brake so so sorry :,)

inductive type - linear position sensor

https://www.gillsc.com/products/position-sensors/1484-linear-position-sensor/

• this sensor can measure angular, linear, and non-uniform travel

inductive type - rotary position sensor

https://www.gillsc.com/products/position-sensors/1498-rotary-position-sensor/

datasheet - https://www.gillsc.com/assets/Uploads/PD1498-Iss-6.pdf

• output is a *pwm/voltage

• may need to program ??? i do not know hehe

• measures 360 degrees

inductive type - the dual cavity position sensor

https://www.gillsc.com/products/position-sensors/1356-dual-cavity-sensor/

• uses induction technology with two coils measuring the position of a unique metallic target activator

• thicker activator prongs produce a stronger field

• sensor output varies symmetrically (~2.5v)

• introducing an activator into the positive coil sends the voltage up and vice versa

• each coil can also be used independently and produces a separate output allowing for the monitoring of two separate movements with a single sensor

• the unique arrangement allows for a wide range of linear or angular motion to be monitored with various output characteristics by changing the shape of the activator

inductive type - side on eddy currents

using the principles of a wire loop induction and eddy currents

eddy current method is based on the principle of generating circular electrical currents in a conductive material. this is achieved by the use of a coil connected to

an alternating current generator driving an alternating magnetic field

the contactless inductive type accelerator pedal position sensor consists of a stator and a rotor