delabs Circuits

Showing posts with label Optical-Proximity-Sensors. Show all posts
Showing posts with label Optical-Proximity-Sensors. Show all posts

Friday, October 20, 2017

Visual Inspection for Quality Control

Wanted a system for detecting: "missprinting cartons reject" in production - Message: pls give me help about mention subject.

Mail from SS

You can scan the manufactured objects with a camera connected to computer USB. Then compare the scans got with a reference standard. Apply a tolerance for acceptance or rejection. Based on the quantity of rejections improve process, till faults are within acceptable limits.

The scanned object must be in same position and same angle for proper results. This depend on some guiding system in conveyor to make object position properly.

Machine vision (MV) is the technology and methods used to provide imaging-based automatic inspection and analysis for such applications as automatic inspection, process control, and robot guidance, usually in industry.

Machine vision is a term encompassing a large number of technologies, software and hardware products, integrated systems, actions, methods and expertise.

Machine-Vision in Genomics Research

A novel machine-vision-based facility for the a.utomatic evaluation of yield-related traits in rice.

Machine-Vision in Genomics Research

The evaluation of yield-related traits is an essential step in rice breeding, genetic research and functional genomics research. A new, automatic, and labor-free facility to automatically thresh rice panicles, evaluate rice yield traits, and subsequently pack filled spikelets is presented in this paper.

Details of the inspection unit. The inspection unit consisted mainly of a three-stage conveyor, two line-scan cameras, two LED light sources, a wind separator and an unfilled spikelet outlet.

Inside the Box Winn Hard

Machine-vision system validates barcodes on packages within carton. The cameras take images of the open shipping container, locate individual packages inside, and then locate the product labels on the individual packages. The information along with images for archive and audit is returned via Ethernet to the Numina Group’s Carton Audit and Validation System (CAVS).


Sunday, October 04, 2015

How bently nevada proximity sensor works

A mail thread from my mail box, i was answering a question by an engineer about proximity switches. Question was -  how bently nevada proximity sensor works

Mail from UM

Microwave and RF radiates energy. - You know when a magnet is moved near small nails it make them Move ! If you make an DC electromagnet, it make the nails move again.

How bently nevada proximity sensor works

But when you keep swapping the polarities, That is with an AC supply it generates a field or radiates an energy. Right from the Toy generator with magnets to the Sun it is the same. The highest form of sun is it radiates photons.

RF is nothing but a Magnet rotated at high speed which is called frequency. This energy can cause food to cook in your microwave oven or a proximity sensor to gauge the gap. It even helps people when the have a sun bath.

I have seen even an old Analog Joystick of a Machine has this induction method to position objects. Study Links below for helping you understand better.


Applications of electromagnetic induction - An eddy current is a swirling current set up in a conductor in response to a ... and to provide the necessary energy required for the motor to do work.

Design of an Eddy-Current Proximity Sensor using a Two-Coil Planar ... .However these proximity sensors are not conducive to scaling to conventional integrated circuit levels. This is because most conventional eddy current


Friday, June 12, 2015

Optical switch with photo sensors

Can you help me to find circuits which uses photo-sensors.and if you do have them, would you please send them to me.

Mail from TM

Just a few days back i have added one. It is to turn of-on water taps.

Optical Obstacle Switch. - one more here  thru all links in great detail.

Here is an image of a low cost gizmo that applies the photo-sensors to detect motion. They are called motion detectors.

Optical switch with photo sensors

How Infrared motion detector components work - Infrared radiation exists in the electromagnetic spectrum at a wavelength that is longer than visible light. It cannot be seen but it can be detected.

K30 PIR Movement Detector -  This circuit is designed around a custom motion-detection IC KC778B. The circuit utilizes both a PIR (Passive InfraRed) detector and a light-dependent resistor (LDR) to detect motion up to 6 meters away.

PIR Controller – KC778B

The MPCC has been designed for easy implementation of AC control functions that use a Passive Infra-Red (PIR) motion detector. Due to its high sensitivity and reliability, it is also widely used in security product.

PIR Controller -KC778B - Auto Camp Light

Above is an example of  camp light using the KC778B. Uses battery 12VDC. Internal voltage regulator is used,  but can work down to 7V.


Thursday, June 11, 2015

Lighting and Power control Automation

i am researching for a project for industrial automation . in this i am having one concept that is following below

if any one of person is in room the electrical power should be connected in this time one or more persons are entering in side that room at that time also that power should be ON .Now that persons who are all inside that room one by one is coming out that power should not be OFF but the last person who is coming out side off the room that power should be OFF

this is my concept of my project for this concept please design a circuit for me please send me replay for this concept

Mail from TM

You have to count people with optical switches or infrared detectors. Then using dsp or up processors and figure how best to establish number of people in room.

See below Motion Detectors - Professional and a DIY Version

Motion Detectors - Professional and a DIY Version

See a Related circuit here Optical Obstacle Switch.

A pair of optical switch-sets for every door that leads to room. Only if object cuts both beams then you count one. It is the idea you have to develop, Circuits are on the web.

See also - InfraRed Detector for Proximity Switch and InfraRed LED Flasher for Optical Switch

A pair of optical switch-sets for every door that leads to room. Only  if  object cuts  both  beams   then you  count  one. Even windows need sensors, if you expect some to use that for movement.  But some may slip in between beams, you might  have  see that happen.

Motion detector - Wiki

An electronic motion detector contains an optical, microwave, or acoustic sensor, and in many cases a transmitter for illumination. However, a passive sensor only senses a signal emitted by the moving object itself.

Other methods are RFID fixed on every person. Then it may be foolproof. Also as  most have cellphones, track the phones with GPS and count people in room.  A footrug with a weight measurement can also count people moving thru door. But a few may jump over them, so it has to be foolproof log footrug.

Updated - 10th Jun 2015