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L-GAGE

LT7 Long-Range Time-of-Flight Sensor

P/N 120244

Banner Engineering Corp.

•

Minneapolis, MN U.S.A.

www.bannerengineering.com • Tel: 763.544.3164

Theory of Operation

A short electrical pulse drives a semiconductor laser diode to emit a pulse of light. The

emitted light is collimated through a lens, which produces a very narrow laser beam.

The laser beam bounces off the target, scattering some of its light through the sensor’s

receiving lens to a photodiode, which creates an electrical pulse. The time interval

between the two electrical pulses (transmitting and receiving the beam) is used to

calculate the distance to the target, using the speed of light as a constant.

Multiple pulses are evaluated by the sensor’s microprocessor, which calculates the

appropriate position value. The outputs energize whenever the target is located between

the user-programmed window limits or when the preset switching threshold is crossed.

Outputs may be programmed for a variety of functions.

Microprocessor

User

Interface

Emitter

Circuitry

Analog

Signal

Processing

Time-of-Flight

Engine

Output

Circuitry

Laser

Emitter

Lenses

Target

Receiver

Element

Figure 6. Theory of operation

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Figure 7. Programming menu tree

Summary of Contents for L-GAGE LT7PIDQ

Page 1: ...ble serial connection options Models Requires a mating cable see page 20 Diffuse mode range specified using a 90 reflectance white card Retroreflective mode range specified using the appropriate speci...

Page 2: ...limated to focus a compact spot even at long sensing distances see Figure 2 Figure 1 Sensor features Figure 2 Light spot dimensions Button Functions Enter Run mode Switches from Run mode to Programmin...

Page 3: ...te single switchpoint full sensing range 5mm hysteresis QA Analog Mode 1 rising positive slope full sensing range Offset 0 Unit mm Serial RS422 Password OFF Multiple Outputs The sensing distance can b...

Page 4: ...me interval between the two electrical pulses transmitting and receiving the beam is used to calculate the distance to the target using the speed of light as a constant Multiple pulses are evaluated b...

Page 5: ...gure 7 QuickSet The received energy value is displayed in the form of a bar graph the more bars the stronger the received signal Outputs Q1 and Q2 are indicated as ON or OFF by the LED indicators on t...

Page 6: ...egun within 10 seconds sensor returns automatically to Run mode Press button 4 times then press PASSWORD _ _ _ 4 Sensor inserts a 4 in the right hand digit then moves blinking cursor to third position...

Page 7: ...ENTER Sensor enters QuickSet program Press to teach current condition to Output 1 Press to teach current condition Output 2 196 mm to target Output 1 OFF Output 2 ON Bars indicate a strong signal Curr...

Page 8: ...sor displays arrow to denote options can be viewed Press or to scroll through options Sensor displays output mode options Press to select displayed output mode MODE Q1 Sensor saves selected option Pre...

Page 9: ...identical If value is outside accepted limits sensor does not save new setting TEACH IN Setup Analog Copy Discrete Limits TEACH Analog output individual limits using the same procedures as described a...

Page 10: ...RED Sensor clears Offset Value setting and returns to Main menu To Adjust Offset If no value was previously entered current sensing distance will be displayed Press to save current sensing distance or...

Page 11: ...urns to Main menu FACTORY PRESET Press to enter Factory Preset menu F PRESET OK Returns sensor to factory preset conditions If activated all previous settings are lost Use Escape function to exit with...

Page 12: ...positioned off of the retroreflective target and at a long distance farther than 50 m 160 Mount the sensor Mount the alignment aid on the front of the sensor over the laser emitters as shown in Figur...

Page 13: ...s measured data via the serial interface without waiting for a request SINGLE mode a string of measured data is supplied only on request Parity even but not shown on LCD menu SSI 1 10 LSB 0 1 mm 10MIL...

Page 14: ...ot laser status ON OFF xx seconds ON Serial settings Serial settings see page 13 Discrete Output Q1 settings Discrete output condition ON Output high OFF Output low Output mode see IM1 IM2 Limit 1 set...

Page 15: ...nput desired value ACK Input Offset Setting All Outputs Up to 12 000 mm plus or minus or 480 00 plus or minus IVL 0 1 ACK Enable Visible Laser 0 Pilot laser OFF 1 Pilot laser ON ISB 0 1 ACK Input Stan...

Page 16: ...Meaning Discrete Output Q2 IH2 000 254 or 000 999 ACK Set Discrete Q2 Hysteresis 0 254 mm or 0 9 99 IL2 Input desired limit value not including Offset ACK Input Discrete Q2 Limit 1 0 12 000 mm or 0 48...

Page 17: ...e Active 0 0 0 0 0 1 0 0 Voltage too low or error in measurement of supply voltage NO VALUE 0 0 0 0 0 0 0 0 First measurement after switching ON sensor not yet ready Message disappears automatically w...

Page 18: ...Analog Output N A 4 20 mA Maximum Cable Length 100 m Output Response Time 12 ms Linearity 10 mm Resolution Repeatability 2 mm 4 mm Color Sensitivity Diffuse Models N A Contact Factory Temperature Effe...

Page 19: ...F Vibration Shock EN 60947 5 2 Application Notes All specifications are based on the specified surface at constant ambient conditions and following a minimum operating time of 15 minutes For best accu...

Page 20: ...Gray Alarm Output 1 F Qp Pink Alarm Output 2 G V Red 18 to 30V dc H RX Black RS422 Receiver data SS1 Clock J NC Violet K TX Gray Pink RS422 Transmitter data SS1 Data L Q2 Red Blue Discrete Output 2 M...

Page 21: ...ately 304 series stainless steel Mounting hardware included Using the Bracket and Fine Adjust Accessory Bolt the two accessories to the base and or angle of the bracket as shown in the photo above ali...

Page 22: ...0 mm 9 8 x 9 8 540 x 540 mm 21 3 x 21 3 700 x 700 mm 27 6 x 27 6 BRT TVHG 8X10P For distances up to 100 m 328 Retroreflective Tape 203 x 254 mm 8 x 10 NOTE Retroreflective material has a pressure sens...

Page 23: ...L GAGE LT7 Long Range Time of Flight Sensor P N 120244 23 Banner Engineering Corp Minneapolis MN U S A www bannerengineering com Tel 763 544 3164...

Page 24: ...rrants its products to be free from defects for one year Banner Engineering Corp will repair or replace free of charge any product of its manufacture found to be defective at the time it is returned t...

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