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*note* : for discussing any technical issues or project designs with your LIDAR-Lite, please proceed to our forum and create a new topic here.

RB-Pli-17 - LLV3HP

The new version of the LIDAR-Lite v3 “High Performance” (LLV3HP) is now available at RobotShop. It offers key improvements while staying compatible with the current interfaces (I2C & PWM) our customers have grown used to. This article will go over the main improvements and differences.

Improvements

  • The casing is now IP rated at IPX7, which means it is resistant to water such as splashes, rain or snow and showering. Because of this LV3HP can be used on robots that operate in damp, wet and even rainy environments without issue. Please note this doe not make it suitable for situations where is it immersed in water.
  • The update rate of the sensor increased from 1-500 Hz to a new maximum of at least 1000 Hz (1 kHz). This is certainly a boon to any application where fast response time to a changing environment is critical.
  • It now uses less current during acquisition: less than  65 mA versus the previous version which used up to 130 mA continuously.

Other differences

  • The casing is slightly bigger in two directions and smaller in another, going from 48 mm x 40 mm x 20 mm for the LIDAR-Lite 3 to 53 mm x 33 mm x 24 mm for the LLV3HP. If you have any projects you wish to upgrade to this new sensor, we recommend that you take a look at your mounting arrangement as this will most likely need to be updated.

We are eager to see what new cool projects will be created using this sensor. Let us know what you are planing with the LLV3HP in the comments below.

 

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10 Responses to “New LIDAR-Lite V3 High Performance (LLV3HP) now available at RobotShop”

  1. Snipersdimages

    Nous souhaitons utiliser ce type de capteur pour mesurer la position et la vitesse d’approche ou d’éloignement d’un sujet, et calculer son moment de passage à une certaine distance. Le but et de déclencher un DSRL (photo) en anticipant l’instant du passage d’un animal dans le plan focale, afin de compenser l’inertie du système en tenant compte de la vélocité du sujet (oiseau, mammifère, insecte) La focale doit pouvoir disperser le faisceau pour ajuster la surface de detection à la taille et à la trajectoire. La distance de mesure doit pouvoir s’étendre de 5 cm à 10 mètres. L’idéal serait un laser infra-rouge invisible.

    • Sébastien Parent-Charette

      @Snipersdimages: Le faisceau du RB-Pli-17 est en effet dispersé. Par contre, le montant de dispersion est fixe et le capteur est calibré pour celui-ci. Vous pouvez consulter les spécifications ici. Celle-ci indique que le faisceau diverge de 8 mrad. Ceci devrait donner une taille du faisceau de quelques cm de large @ 10 m.
      Pour de l’aide technique au sujet de votre projet, s’il vous plaît créez un message ici.

  2. Ray

    Hi, is it possible to have the datasheet of the product? I am curious about the measurement rate setup (MEASURE_DELAY). It would be also interesteng to know how the measurement rate affects power consumption.

    • Sébastien Parent-Charette

      @Ray: The datasheet is still not out yet since the product has not entered production yet. We should be getting the official information shortly. As soon as we receive it, it will be place on the product page under Useful Links.

  3. Doppler_uav

    Hi, do you know if it will work ok with Pixhawk? I heard that the previous version of lidar-lite v3 had some issues with Pixhawk. I´m starting a project and will have to decide between this or another rangefinder. Thanks.

    • Sébastien Parent-Charette

      @Doppler_uav: Actually, the LIDAR-Lite (v1, v2, v3) always seemed to work well with Pixhawk using the PWM mode. Some versions had issues in some cases using I2C, but those were resolved with the latest LIDAR-Lite v3 and the LLV3HP. You can read as much online, such as here.

  4. Roger Thibeaux

    Sebastian, how can I utilize the Lidar to measure pipe diameters in a sewer remotely.

    • Sébastien Parent-Charette

      @Roger Thibeaux: Measuring the diameter directly would imply having the sensor at the periphery of the pipe. Since that is unlikely, an alternative option would be to measure part of the distance and derive the diameter from that. For example, if your sensor is in the center of the pipe, you can can simply measure the radius. Another case would be is your sensor is on a rover platform inside the pipe. The rover would be at the bottom and you could therefore measure straight up part of the diameter and add to it the displacement from the rover itself to get the full diameter. Please note the sensor has a resolution of 1 cm, so unless the pipes you are measuring are quite big, this may not be precise enough. As for remotely, you would need to use some form of wireless or wired communication. For more technical help, please create a new topic on the forum here. Make sure to include as many details about your project as possible, such as pictures, drawings, setup, requirements, goals, etc.

  5. Abidine

    Hi Sébastien,
    I want to use the Lidar Lite 3 in my small device (based on a raspberry pi 3) to measure the distance between the sensor and a vehicle (a range of 15 to 30m). I know heavy rain may influence the measurement but i was wondering if I’ll get one return from the water, no return at all, or multiple returns: small ones from the rain drops and a big one from the vehicle.
    Thanks in advance

    • Sébastien Parent-Charette

      @Abidine: The device actually returns a measurement based on the aggregation of (typically) hundreds of signals, not just one. This is why it is able to perform well in many circumstances. In most cases, the sensor will simply need more time in order to obtain a proper measurement. That being said, if the rain is particularly heavy, it most likely will have reduced range (and accuracy) as less of the signal makes it through properly. The best would be to test the sensor in the conditions you expect it to be in and see how it performs.

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