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Detection of Transparent Objects

The de­tec­tion of trans­pa­rent ob­jects can often be a real challenge due to their light trans­mis­si­on. Dif­fe­rent tech­no­lo­gies may work bet­ter under cer­tain con­di­ti­ons or may prove more ef­fec­ti­ve for spe­ci­fic ma­te­ri­als. An over­view of pos­si­ble sen­sor so­lu­ti­ons is pro­vi­ded here.

The Big­gest Chal­lenges in De­tec­ting Trans­pa­rent Ob­jects

Transparent glass container in the pharmaceutical industry

Trans­mis­si­on Rate of Trans­pa­rent Ob­jects

Challenge: Trans­pa­rent ob­jects have a high de­gree of trans­mis­si­on, which cau­ses the light emit­ted by the sen­sor to pass through ob­jects. This mi­ni­mal ab­sorp­ti­on of the light in­ten­si­ty makes de­tec­tion more dif­fi­cult for the sen­sor.

So­lu­ti­on:
Filled bottles in the brewery

Re­sis­tance to Con­ta­mi­na­ti­on

Challenge: Dust and con­ta­mi­na­ti­on af­fect sen­sor re­lia­bi­li­ty in in­dus­tri­al pro­duc­tion en­vi­ron­ments. This re­sults in re­cur­ring main­ten­an­ce in­ter­vals and the sen­sors ha­ving to be taught in again.

So­lu­ti­on: 
Medical ampoules in a pharmaceutical factory

In­ter­fe­rence Ef­fects with Ir­re­gu­lar­ly Shaped Ob­jects

Challenge: Ir­re­gu­lar sha­pes and sur­faces can cause in­ter­fe­rence, es­pe­cial­ly with mo­ving ob­jects with shiny sur­faces, cur­ves or edges. This can lead to un­con­trol­led light re­flec­tion and trans­mis­si­on and can im­pair the sen­sor sys­tem.

So­lu­ti­on: 
Dis­co­ver our port­fo­lio of re­flec­tors, in­clu­ding those with re­com­men­ded mi­crostruc­tu­re for de­tec­ting trans­pa­rent ob­jects!

Sen­sor So­lu­ti­ons at a Glan­ce

Ultrasonic sensor emits sound waves

Ul­tra­so­nic Sen­sors

Ul­tra­so­nic sen­sors use high-​frequency sound waves. They de­ter­mi­ne the time in­ter­val bet­ween the emit­ted and re­cei­ved si­gnal of ul­tra­so­nic pul­ses to cal­cu­la­te the di­s­tance to the tar­get ob­ject. They can re­lia­b­ly de­tect ob­jects, from dark to trans­pa­rent, thanks to color-​independent sound re­flec­tion. This makes them ver­sa­ti­le, es­pe­cial­ly for ap­pli­ca­ti­ons that re­qui­re pre­cise ob­ject de­tec­tion.

Wide Range of Ap­pli­ca­ti­ons for All Chal­lenges

Note: Sim­ply click the re­le­vant icon to learn more about the ap­pli­ca­ti­on.
Pizza and pizza slice
Food industry
Medication
Pharmaceuticals industry
Two sales packages
Packaging technology
Cosmetic products
Cosmetics industry
Transport crane in logistics
Logistics
Deposit bottles
Deposit return machines
Glass bottle
Beverages industry
Electric Mobility

Functional Principles for Detecting Transparent Objects

Func­tio­nal prin­ciple Be­ne­fits Pro­ducts
Ultrasonic distance sensors Ul­tra­so­nic di­s­tance sen­sors
  • Ad­jus­ta­ble sonic cone width for de­tec­ting trans­pa­rent ob­jects with com­plex sha­pes
  • Ma­te­ri­al and color in­de­pen­dent
  • Re­sistant to con­ta­mi­na­ti­on
Ultrasonic fork sensor for label detection Ul­tra­so­nic fork sen­sor for label de­tec­tion
  • The emit­ter and re­cei­ver are in the same housing
  • Ma­te­ri­al and color in­de­pen­dent
  • Re­sistant to con­ta­mi­na­ti­on
Retro-reflex sensors for transparent objects Retro-​reflex sen­sors for trans­pa­rent ob­jects
  • Re­lia­ble de­tec­tion of trans­pa­rent ob­jects 
  • Re­lia­ble process thanks to dy­na­mic re­ad­just­ment of the swit­ching th­res­hold
Fork sensors Fork sen­sors
  • The emit­ter and re­cei­ver are in the same housing
  • Re­lia­ble de­tec­tion of even the smal­lest ob­jects and clear glass
  • Ide­al­ly ali­gned transmitter-​receiver axis at the fac­to­ry
Through-beam sensor for PET selection Through-​beam sen­sor for PET sel­ec­tion
  • Di­stin­guis­hing clear PET from other trans­pa­rent ma­te­ri­als and opaque ob­jects
  • Two swit­ching out­puts for out­put­ting the re­le­vant swit­ching sta­tes

Functional Principles for Detecting Semi-Transparent Objects

Func­tio­nal prin­ciple Be­ne­fits Pro­ducts
Reflex light barriers Re­flex light bar­riers
  • Saves time and costs du­ring in­stal­la­ti­on as no re­flec­tor is re­qui­red
  • En­ables ap­pli­ca­ti­ons where re­flec­tor moun­ting is not pos­si­ble for process-​related re­a­sons
  • Re­lia­ble process thanks to dy­na­mic re­ad­just­ment of the swit­ching th­res­hold
Laser distance sensors time-of-flight Laser di­s­tance sen­sors ToF
  • For ap­pli­ca­ti­ons with a large work­ing range
  • Pre­cise edge and ob­ject de­tec­tion using a com­pact laser light spot
  • Bright laser light spot for sim­pli­fied ali­gnment and in­iti­al start-​up
  • Saves time and costs du­ring in­stal­la­ti­on as no re­flec­tor is re­qui­red
Fiber-​optic sen­sors
  • Fle­xi­ble ad­ap­tati­on through com­bi­na­ti­on with dif­fe­rent fiber-​optic ca­bles
  • In­de­pen­dent of batch chan­ge due to jump de­tec­tion
  • Re­lia­ble process thanks to dy­na­mic re­ad­just­ment of the swit­ching th­res­hold
  • Easy ad­just­ment via NFC and dis­play

Down­loads for Trans­pa­rent Ob­ject De­tec­tion

Ultrasonic Sensors Product Flyer
Ultrasonic Sensors Product Flyer (995 KB)

This do­cu­ment con­tains the pro­duct flyer for the ul­tra­so­nic sen­sors.

der wintec. Brochure
der wintec. Brochure (1 MB)

This do­cu­ment con­tains the bro­c­hu­re on long-​range laser di­s­tance sen­sors with win­tec (wenglor interference-​free tech­no­lo­gy).

PNG//smart Product Flyer
PNG//smart Product Flyer (1 MB)

This do­cu­ment con­tains the PNG//smart sen­sors pro­duct flyer. Pho­to­elec­tro­nic Next Ge­ne­ra­ti­on stands for a new age of smart pho­to­elec­tro­nic sen­sors.

P1XD Product Flyer
P1XD Product Flyer (902 KB)

This do­cu­ment pro­vi­des an over­view of the P1XD se­ries fiber-​optic am­pli­fiers.

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