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ST的飞行时间传感器产品以及哪些传感器具有哪些功能

我有点沮丧，因为没有“这是 ST 的飞行时间传感器产品以及哪些传感器具有哪些功能”之类的页面。传感器数据表本身也不提供与其他（引脚兼容）部件的任何实际比较数据。
从我收集到的：
vl53l0x - 25o FOV，测距传感器中的基本型号。单一区域，单一目标
vl53l1 - 27o FOV，多区域（可调 FoV）
vl53l1x - 相同但有更多区域？
vl53l1cb - 不知道
vl53l2 - 不是产品
vl53l3cx - 25o FOV、多目标、更快 (1MHz) I2C
vl53l4cd - 18o FOV，短距离 (1mm - 1300mm)，快速 (100Hz)，1MHz I2C
vl53l4cx - 基于直方图 (?)，远程 (0-6000mm)，18o，多目标
看起来 L5 不兼容足迹：
vl53l5cx - 63o FOV，多区域，多目标
vl53l5cp - cx + 人员检测？
vl53l8ca - 第二代，像 L5 一样的宽 FOV，与 L5 引脚兼容？
然后是 VL6180，它与封装不兼容，我认为它更旧，基于早期的 ToF 设计，以及添加 ALS 的 VL6180x？
我还找到了 John Kvam 关于 ToF 传感器的演示（是否有与幻灯片配套的网络研讨会视频？）但它也没有涉及这些产品之间的差异以及何时/如何选择一个而不是另一个。









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陈桂平

2022-12-7 14:30:03
1. Introduction

[size=13.0813px]There are getting to be many Time-of-Flight sensors, and although there is a product selection page at www.ST.com/TimeOfFlight it can be a bit of a challenge.

So let me introduce each sensor grouping them by their most significant attributes. Then we can get into more detail. To make things more concise, the terms are defined below the sensor listing

2. Time-of-Flight sensors performances

2.1 Short distance*; lowest power; 850nm VCSEL*; Autonomous

  • VL6180V1
  • VL6180CX – same as the VL6180V1, but adds ALS*
[size=13.0813px]All the VL53 sensors below have invisible, 940nm VCSELs
2.2 Medium distance sensors

  • VL53L0CX –  Autonomous; 27-degree Field of View*
  • VL53L4CD* – Autonomous 17-degree Field of View; Ultra Lite software (ULD) *
2.3 Longer distance sensors

  • VL53L1CX – Adds an optical* lens to the L0 to get longer ranging, ULD driver
  • VL53L3CX – Adds Histograms* to get longer ranging
  • VL53L4CX –Single Mode 17-degree Field of View; Histograms
2.4 The longest range

  • VL53L1CB – Adds optical lens AND Histograms to get the very longest range.
[size=13.0813px]Up to this point the effort has been to ever longer distance sensors. But we’ve reached the practical limit. So here is a completely new class of device:
2.5 Multi-zone:

  • VL53L5CX – Long distance; Multi-zone; Wide Field of View*; Autonomous
    • The ‘L5CX’ is really in a class by itself, it is much more capable than then the prior sensors.

3. Summary Table
1.jpg
4. Glossary

  • Distance – Datasheet gives the max distance in ideal conditions, but here is a practical estimate:
    • Short distance – good for seeing hands to 50cm
    • Medium distance – can see people to 1.5M
    • Long distance – Can see people to 3M
    • Longer distance – Can see farther, but one needs a big target.
  • VCSEL – Vertical Cavity Surface Emitting Laser. 850nm is barely visible, All the VL53 sensors use a completely invisible 940nm VCSEL.
  • Field of View (FoV) –  most sensors have a 27-degree Field of View. This means the diameter of the area of illumination is ½ the distance to the target.
    • L4CX has a 17-degree FoV.
    • L5CX has a square FoV of 45x45 for 63° diagonal
  • Autonomous – sensor does all the work. It can wake a sleeping MCU based on proximity.
  • ULD – Ultra Lite Driver. Software available for the very smallest MCUs.
  • ALS – Ambient Light Sensor. Not very many people use this, but they can.
  • Optics – by adding a Lens on the sensor it can gather more light and can range farter. It can also adjust the Region of Interest.
  • Histograms – Patented algorithm: each bin of the histogram is the number of photons captured during that clock cycle. This allows multiple targets in one collect, better accuracy and longer distances. However, the processing of the histogram is done in the host with ST software.
  • Single Mode VCSEL – narrower FoV laser that comes on more quickly and thus produces a bit more accuracy.
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