The document discusses several applications of Hall effect sensors in mechanical engineering, including in anti-lock braking systems (ABS), liquid level sensors, proximity sensors, flow rate sensors, and crankshaft position sensors. It describes the basic working principles of Hall effect sensors and how they are used in each application. For example, it explains that ABS uses Hall sensors and wheel speed sensors to monitor wheel speeds and control brake pressure to prevent locking. Liquid level sensors use a float and magnet detected by a Hall sensor to measure fuel levels. Proximity sensors detect the presence or absence of magnetic objects. Flow rate sensors measure flow by detecting magnets on an impeller rotated by water flow.
Modern day automobile engines are made of many electronic and electrical components that constitute engine sensors, relays and actuators. All these electronic and electrical components work together to provide Engine Control Unit (ECU) with vital data required to govern the engine functionality effectively. Sensors send the information in very less time. Sensors used in engine are generally electro-mechanical type devices that monitor various engine parameters.
Modern day automobile engines are made of many electronic and electrical components that constitute engine sensors, relays and actuators. All these electronic and electrical components work together to provide Engine Control Unit (ECU) with vital data required to govern the engine functionality effectively. Sensors send the information in very less time. Sensors used in engine are generally electro-mechanical type devices that monitor various engine parameters.
In high power traction system applications two or more machines are fed by one converter. This topology results in a light, more compact and less costly system. These systems are called multi-machines single-converter systems. The problems posed by different electrical and mechanical couplings in these systems (MMS) affect various stages of the systems and require control strategy to reduce adverse effects. Control of multi-machines single-converter systems is the subject of this paper. The studied MMS is an electric vehicle with four in-wheel PMS motors. A three-leg inverter supplies two permanent magnet synchronous machines which are connected to the front right and rear right wheels, and another inverter supplies the left side. Several methods have been proposed for the control of multi-machines single-inverter systems, the master-slave control structure seems best adapted for our traction system. In this paper, a new control structure based on DTC method is used for the control of bi-machine traction system of an EV. This new control has been implanted in simulation to analyze its robustness in the presence of the various load cases involved in our electric vehicle traction chain. Simulation results indicated that this structure control allowed the stability of the traction system.
A short introduction to the common types of sensors used in modern automobiles and their functions. Please note this is only an overview, and does not include ultramodern sensors used in high end cars.
Transmission is a part of the car which connects the engine to the wheels. When car speeds up, the engine can not speed up in the same proportion, so there are gears involved which match the engine speed to the wheel speed so that we can drive faster or slower than the engine speed.
This presentation is about cam less engine.
1)Introduction
2)what is engine ?
3)working of coventional Engine.
4).sensor used in engine
1)Engine load sensor
2)Exhaust gas sensor
3)Valve position sensor
4)Engine speed sensor
5)Advantages
In high power traction system applications two or more machines are fed by one converter. This topology results in a light, more compact and less costly system. These systems are called multi-machines single-converter systems. The problems posed by different electrical and mechanical couplings in these systems (MMS) affect various stages of the systems and require control strategy to reduce adverse effects. Control of multi-machines single-converter systems is the subject of this paper. The studied MMS is an electric vehicle with four in-wheel PMS motors. A three-leg inverter supplies two permanent magnet synchronous machines which are connected to the front right and rear right wheels, and another inverter supplies the left side. Several methods have been proposed for the control of multi-machines single-inverter systems, the master-slave control structure seems best adapted for our traction system. In this paper, a new control structure based on DTC method is used for the control of bi-machine traction system of an EV. This new control has been implanted in simulation to analyze its robustness in the presence of the various load cases involved in our electric vehicle traction chain. Simulation results indicated that this structure control allowed the stability of the traction system.
A short introduction to the common types of sensors used in modern automobiles and their functions. Please note this is only an overview, and does not include ultramodern sensors used in high end cars.
Transmission is a part of the car which connects the engine to the wheels. When car speeds up, the engine can not speed up in the same proportion, so there are gears involved which match the engine speed to the wheel speed so that we can drive faster or slower than the engine speed.
This presentation is about cam less engine.
1)Introduction
2)what is engine ?
3)working of coventional Engine.
4).sensor used in engine
1)Engine load sensor
2)Exhaust gas sensor
3)Valve position sensor
4)Engine speed sensor
5)Advantages
Anti-lock Braking System also known as anti-skid braking system (ABS) is an automobile safety system which prevents the locking of wheels during braking and avoid uncontrolled skidding.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Efficiency analysis of hydraulic power steering systemLaukik Raut
Hydraulic assisted power steering
system is a high bandwidth servo with stringent
performance requirements on accuracy,
reliability, and cost. Design of such a system can
be best achieved by using a validated and user
friendly computer simulation program.
Hydraulic integrated power steering ( HIPS )
program has been developed using basic concepts
from science and engineering. HIPS provides a
design and test environment for the integrated
steering and suspension system subjected to
disturbance forces, which may be induced by
pump flow oscillations and tire loads. Two realworld automotive hydraulic steering systems are
simulated with HIPS. The simulation results
agree closely with the dynamometer test results.
The application of HIPS for design optimization
is also demonstrated.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
We have compiled the most important slides from each speaker's presentation. This year’s compilation, available for free, captures the key insights and contributions shared during the DfMAy 2024 conference.
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Hall's effect application in Mechanical Engineering
1. Engineering Physics Application of
Hall’s Effect in
Mechanical
Engineering
Department of Mechanical Engineering
UNIVERSITY OF ENGINEERING AND TECHNOLOGY,
LAHORE
2. Haris Riaz 2020-ME-61
DEPARTMENT OF MECHANICAL ENGINEERING PAGE 1
Figure 1: Analog
ABS Hall Sensor
Figure 2: Digital ABS
Hall Sensor
1. Anti-Lock Braking System (ABS)
Description:
The main function of the ABS systemis to control the speed of the
wheels when the brakepedal is pressed by checking whether any of the
wheels decreases its speed faster than the others. This means that
there’s a possibility of a wheel "block". The modern equivalent is now
called "Stability Control" and is much more advanced than the standard
ABS. New cars are fitted with anti-skidsystem, which basically works
opposite to the ABS. If there is someincrease to the individual rate of
any of the wheels when accelerating, this wheel receives breaking
pressureto reduce the difference. During this time, the electronic
control unit changes the torque. The ABS indicator light does not flash
before, during and after the aboveaction, i.e. controlunit does not
perceive the situation as an error, but as the normaloperation of ABS.
Types:
ABS sensors aredivided into twotypes:
Passive(analog)
Active (digital)
Appearance:
An analog and digital ABS sensor is shown below in Fig.1 and Fig.2:
3. Haris Riaz 2020-ME-61
DEPARTMENT OF MECHANICAL ENGINEERING PAGE 2
Principle of operation of the ABS:
ABS Sensor consists of three mainelements:
• Wheel speed sensors
• Electronic control unit (ECU) (i.e. ABS controller).
• Actuator – hydro-pneumatic unit.
Each controlled wheel is fitted with pinion and inductive sensor
comprising a permanent magnet and a coil. Rotation of the pinion
induces AC voltage in the coil sensor, which frequency is proportionalto
the angular speed and the number of teeth of the wheel.
Hydro-pneumatic unit incorporates hydraulic accumulator, electro-
hydraulic pump and valves. Individually adjustablevalves arefitted
in pair at each wheel: normally open input valve and normally closed
output valve. By controlling these valves, the ECU increases, decreases
or maintains constant pressurein the brakechamber. In the initial state
of the hydro-pneumatic unit, the two electromagnetic valves and the
hydraulic pump motor are empty. Brake chamber is connected to the
master cylinder through the open output valveand the input valveis
closed.
At normaloperating pressures (no wheel“block”) brakefluid passes
fromthe master cylinder to the brake chamber without restriction as
the pressureof the fluid in the cylinder and the chamber is equal and
proportionalto the amount of pressureapplied on the brake pedal. In
this case ABS sensor does not affect the brakesystem. During an
emergency brake (possibility of wheel “block”) the ECU controls the
electromagnets of two valves simultaneously causing them to operate.
The input valve releases the brakechamber fromthe master cylinder
and the output valve connects it with the hydraulic accumulator, thus
reducing the pressure. Simultaneously, the ECU turns on the hydraulic
pump motor to return liquid from the hydraulic accumulator in the
master cylinder. Brakechamber pressurecontinues to decrease. When
the possibility of wheel lock disappears, theECU closes the output
4. Haris Riaz 2020-ME-61
DEPARTMENT OF MECHANICAL ENGINEERING PAGE 3
Figure 3: ABS Sensor Fitted in a
vehicle
valve. The brakechamber is disconnected fromthe master cylinder and
fromthe hydraulic accumulator, and the pressurein the chamber
remains constant and less than the master cylinder. When the wheel
speed increases, the ECU turns off the input valve which opens and the
brakechamber is connected to the master cylinder again. The pressure
in the chamber increases and equalizes to the pressurein the master
cylinder. This completes one cycle of operation of ABS.
If the wheel tries to block again, next cycle is being started. System
frequency is 5Hz - 10Hz.
When ABS operates the averagepressurein the brake chamber does
not depend on the applied pressureto the brakepedal. It is determined
by the ECU and depends on the conditionof road surface.
In its full configuration ABS includes four sensors and four pairs of
valves, which allows individual control of each wheel to achieve
maximum effect and allows keeping the diagonal distribution of brake
actuators. Such systems areused to be called four-channel systems.
2. Liquid Level Sensor
Description:
5. Haris Riaz 2020-ME-61
DEPARTMENT OF MECHANICAL ENGINEERING PAGE 4
Every car, truck and motorcycle are equipped with a
fuel level sensor to measure the amount of gasoline left in the fuel tank.
Although these sensors havebeen in place for a long time already, there
are still someevolutions ongoing and require manufacturers to consider
new solutions in order to save space, weight and costor to increase the
reliability of thesesensors and the fuel tanks. Among other, these
requirements have led to more complex tank geometries and a reduction
of the tank openings to reducefuel leakage and permeation.
WorkingPrinciple with Appearance:
The Hall sensor is used in some automotive fuel-levelindicators. In a
vertical float system, a permanentmagnet is mounted on the surfaceof
a floating object. The current-carrying conductor is fixed on the top of
the tank, lining up with the magnet. When the level of fuel rises, an
increasing magnetic field is applied on the current, resulting in higher
Hall voltage. As the fuel level decreases, the Hall voltage also decreases.
The fuel level is indicated and displayed by proper signal condition of
Hall voltage. Another possibleimplementation of fuellevel sensor uses
a vertically moving float. Depending on whether a continuous signalor
only discretelevels are needed, solutions with magnetic sensors can be
designed based on either linear Hall sensors or Hall switches. Figure4
shows a possibleimplementation using an array of linear Hall sensors,
utilizing two small magnets that are magnetized in opposite directions.
By choosing the distance and size of the magnets properly, the
horizontalfield component turns out to be linear over a considerable
range as can be seen in Figure 5. The distance between the linear Hall
sensors then needs to be chosen in such a way that there is always at
least one sensor in its linear range. Fromthe outputs of the sensors, itis
possibleto decide which sensor output is to be taken.
6. Haris Riaz 2020-ME-61
DEPARTMENT OF MECHANICAL ENGINEERING PAGE 5
Figure 4: Vertical float based liquid level sensors using linear Hall sensors and
Hall effect switches.
Figure 5: Possible output signals from an
array of linear Hall sensors.
3. Proximity Sensors:
Description:
Hall effect proximity sensors areused to detect
the proximity, presenceor absence of a magnetic object using a critical
distance. They function via an electrical potential that is developed across
an axis transverse to an appliedcurrent flow in the presenceof
a magnetic field.
WorkingPrinciple:
7. Haris Riaz 2020-ME-61
DEPARTMENT OF MECHANICAL ENGINEERING PAGE 6
Figure 6-7: Proximity Sensors
There are two concepts for developing a
proximity sensor thatcan be used for accurate positioning. In the first
example, Figure6, four digital output unipolar sensors arethreaded into an
aluminum housing and actuated individually by four magnetic actuators. In
use, event signals are generated by the sensors which representdistances
measured froma reference surface. These signals define the acceptable
dimensional limits between which the item under test mustgenerate
electrical pulses. In a known application, each of the sensors has
accumulated at least 8 million operate/release cycles per month and is still
operating, without replacement or maintenance.
In the second example, Figure 7, four digital output bipolar sensors are
actuated by one magnet mounted on a rod. Applications using this concept
can achieve linear positioning accuracy of .002”. Sensing various lens
locations for photo-processing equipmentis an ideal application for this
concept. Itcould also be used to sensethe precise location of a moving
table for a 35mm slide mounter.
4. Flow Rate Sensor:
Description:
Flow Rate Sensor is a device which is used to
measure flowrate of a liquid analog or digitally using Hall Effect Sensor.
8. Haris Riaz 2020-ME-61
DEPARTMENT OF MECHANICAL ENGINEERING PAGE 7
Figure 8: Flow Rate
Sensor
WorkingPrinciple:
Figure8 illustrates a concept that uses a
digital output bipolar sensor and magnets mounted to an impeller to
measureflow rate for a water softener. In this design, the softener can be
made to automatically rechargeon demand, instead of on a timed basis.
Demand is determined by measuring the amount of water that has passed
through the softener. When a certain level is reached, the recharge cycle
begins. There are various methods for designing Hall effect flowmeters,
but the general principle is the same: each actuation of the sensor, by a
magnet or by shunting the magnetic field, corresponds to a measured
quantity of water. In the example shown, the magnetic field is produced by
magnets mounted on the impeller blade. Theimpeller blade is turned by
the water flow. The sensor produces two outputs per revolution. Besides
the immediate savings derived by the proper usageof the salt, this
approach provides morereliability, and longer life and the assuranceof a
continuing supply of softened water.
Appearance:
9. Haris Riaz 2020-ME-61
DEPARTMENT OF MECHANICAL ENGINEERING PAGE 8
5. Crankshaft Position or Speed
Sensor:
The Hall Effect (named for its discoverer) utilizes the fact that a magnetic
field generates a voltagewithin a hall element. Its level is independent of its
rate of change. The sensors includethe necessary magnet (M) and the dual
hall element (DH). With the profile passing by, the magnetic field varies,
thereby creating the signal voltage within the hall element. Here it is
important to keep in mind that the signal does not fade at low speed. The
principle engages a twin chip hall element and the signal amplifier (A) uses
only the difference between both. It is then amplified to providethe power
square wave output.
A temperature compensated -40°C to+150°C (-40°F to
302°F) vaneoperated sensor is mounted in the damper
hub lip. The frequency of the output signal will be
proportionalto the speed of the crankshaft, even down
to zero speed. Since the magnetic field is being
interrupted, vibration, eccentricity and end play
tolerance have little effect on the output signal. Notches
in the lip can be used as timing marks to indicate the
position of the crankshaft. Directinterfacing of the
sensor to the on-board microprocessor adds additional
reliability to the system.
6. Conclusion:
Hence, Hall Sensors are widely used not only in Mechanical Engineering
field but also in the latest technologies. They havefound vastapplications
in Automotive industries too.
Figure 9: Crankshaft
Speed Sensor