GNSS出现，无需垂直平整杆位吗？

用GNSS天线出发是一项棘手的任务。查看控制器屏幕上的说明和值，将杆移至所需位置，并通过将杆气泡居中（全部同时）确保垂直于垂直的位置 - 需要仔细执行，并且不容易，尤其是当时间压力为高的。与新的Leica GS18 T, setting out is much more convenient and faster than ever before. In this article Paul Dainty explains more.

Surveyors and setting out engineers are no different. Pressure at work is high. There are the usual time-critical tasks to do on a typical construction site such as checking the as-built structure, or setting out earthworks or building foundations.

压力打开。船员和一台昂贵的机器正在等待.

Sometimes though, the pressure on site can get really high. Imagine, the excavator machine has just arrived on site earlier than planned and it is ready to start the earthworks. The problem is the profile boards have not been set out, and this needs to be done before the earthworks can start. The setting out engineer is the only person who can do this. The pressure is on. He must set out these profile boards right now, as fast as possible, to the highest possible accuracy of course while a very expensive machine is waiting idle, not to even mention dozens of impatient workers.

使用传统的GNSS RTK漫游者出发可能很慢

With a conventional GNSS RTK rover, setting out is a rather slow and methodical procedure. This is because the pole needs to be held vertically at the same time as looking at the setting out information on the controller screen all the while moving the pole into position. The GNSS position is calculated to the antenna, which is fixed onto a 1.8 m or 2 m pole. Hence, for the setting out information on the screen to be correct, the pole must be held vertically by centering the pole bubble.

To set out a position accurately, it is needed to perform several tasks at the same time:

• Look at the setting out instructions and values on the controller screen
• Walk and orientate: Move the pole to the required position so that the stake values are close to zero
• Ensure the pole is vertical by centering the pole bubble

Simplified setting out with the new Leica GS18 T. Looking at the pole bubble and holding the pole vertical (like in the image) are history.

As it is extremely difficult to do these all at the same time, it is generally preferred to follow those tasks in an iterative process:

It needs to be an iterative process because by centering the bubble to ensure the pole is vertical in step 3, we probably need to move the antenna, and need to go to step 1 again to check the setting out instructions on the screen. Then do step 2 again to adjust the pole position, and so on. To set out a position accurately enough, the process probably has to be performed two or three times, which is not particularly difficult, but it does take time to do it properly.

Now returning to our site, imagine the excavator and the crew of workers waiting for you to carefully set out the profile boards, performing the iterative setting out process on each one. The situation is likely to be very stressful and mistakes are likely to happen, slowing the process down further.

Imagine being able to set out without needing to perform this iterative process.

Well, now that is possible, using theLeica GS18 Twith tilt compensation. The GS18 T is the first GNSS RTK rover to allow staking out with a tilted pole. Because the GS18 T combines seamlessly with theLeica Captivatefield software, tilt compensated measurements are possible in any app within the software. We can measure and stake points, lines, roads or whatever is needed, all with a tilted pole.

The new Leica GS18 T – different from all other GNSS sensors

那么，倾斜补偿是如何工作的，如何消除对迭代设置流程的需求？对于GS18 T，Leica GeoSystems开发了一种非常特殊的IMU和一种专利的方法，可以将IMU和GNSS数据组合在一起。有了这项新技术，不再需要依靠磁力计计算每个测量的倾斜方向。具有倾斜补偿的GS18 T无校准，传感器不受磁干扰的影响。GS18 T不仅具有出色的使用能力，而且还用于衡量，因此GS18 T与目前市场上市场上的所有其他倾斜补偿传感器不同。

凝视变得容易得多，因为倾斜补偿消除了将气泡置于气泡以使杆垂直方向的需要。这意味着，在使用GS18 t出发时，工程师只需要执行以下两个步骤：

• Look at the setting out instructions and values on the controller screen
• Move the pole tip to the required position so that the stake values are close to zero

Intuitive stake out: With the GS18 T the position of the pole and the distance of the pole tip to the stake point are graphically shown in real time on the controller with a powerful 3D viewer.

The following video sequence gives a good impression how it works:

As the setting out engineer does not need to ensure the pole is vertical by centering the pole bubble any more, the process is not iterative anymore. Setting out is much more comfortable and can be done faster than ever before.

与新的Leica GS18 T setting out can be done quickly, confidently and accurately with the minimum of fuss and reduced stress. Simply get the job done on time.

Ask for a demo, if you want to try out the new GS18 T on your own.

想要自己对世界上最快的GNSS RTK Rover的印象的读者，请与您联系当地的Leica Geosystems分销商and ask for a demo. Demos are possible from November 2017 onward. The Leica Geosystems distribution network will be at your service.

保罗·迪蒂（Paul Dainty）
Leica Geosystems的应用程序工程师