When it comes to badminton, the name of our "super Dan" - Lin Dan will definitely appear in the minds of many people. If you are a badminton enthusiast, you must know the names and equipment of the four kings by heart. The popularity of badminton in China is very high, but to reach a relatively high level, it needs professional training and constant contact. Of course, "burn racket" and "burn coach" are very expensive. If there is a product that can record your playing status in real time, then analyze what problems exist, and provide solutions, it would be excellent, In addition to a class of intelligent badminton rackets, the current intelligent badminton products are also badminton sensors like this test. What's the specific effect? Let's talk about it slowly.

[Unpacking]

First, look at the outer package. There is official WeChat on the side (there is APP inside WeChat), and on the other side is the product performance logo, which is connected through Bluetooth.

Open the box, the first layer: the sensor is in the middle, and two plastic bases are on both sides.

The bottom layer is the instruction manual, two silicone handle sleeves, charging data cable and two 3M glue.

OK, Here is the family photo.

The sensor is the size of a dollar coin, with a USB charging socket on one side, and a row of LED light dots on the front in purple to show the working status.

Balance point and handle thickness in badminton racket:

The balance point of badminton under the advanced science popularization:

[Balance point of the racket] is a parameter of the racket, which is used to indicate whether the racket is head heavy or head light. It is also a 3u racket. Why do some rackets feel laborious and powerful when they are waved; Some rackets are easy to swing and return quickly. This is why the weight of the racket is concentrated on the head. When you buy a racket, you will wear the ball line and wrap the hand glue. At this time, the balance point has changed. Don't underestimate the change of the balance point. Once you change the balance point, the original ball feeling will change greatly, which will seriously affect the play!

[Thickness of racket handle]: The thickness of racket handle is generally expressed in G, which is divided into G0 to G5. The larger the number, the thinner the handle, the lighter the handle, and the closer the balance point of the racket is to the racket head. The handle is usually divided into G3 and G4, and some also have G5. Of course, the choice of which is based on the comfort of your grip, or friends who do not understand, can be Baidu.

Will this sensor significantly change the balance point of the racket? According to the actual measurement, when using the rubber sleeve, the balance point changes more than the first one (the rubber sleeve is heavier). When using the plastic base or directly pasting the sensor, the balance point changes less, so if you want to use this sensor, try to choose the second installation method.

The first installation method or the second one has the advantage that it does not affect the grip of the racket. The huge rubber sleeve is placed on the keel hand glue, causing the difference in levels, which greatly affects the swing, the diaphragm hand and the feel of the hand.

Installation mode I:

Plastic buckle+3M glue, use 3M glue to stick the connecting rod tail and plastic buckle, and then push the sensor to finish it. This way will not affect the grip, and it is also comfortable to watch.

Second:

The rubber sleeve design is adopted. The manufacturer has prepared 2 sets (different sizes) for adaptation, which is not bad. Then the rubber sleeve has a charging port reserved, but there is no direct opening. It is a little troublesome to dig it yourself. This is not easy to drop, but the disadvantage is that it slightly affects the grip feel.

In addition, one side of the 3M glue is quite difficult to uncover (I don't know whether it is the weather, the test room temperature is about 25 ℃)

If the 3M adhesive sensor is used directly, it will fall in the later measurement, so the first method is recommended.

【 APP 】

Of course, when it comes to the word "smart", it must be linked to the APP. There is only one official WeChat QR code left on the manual and the entire package. To provide the QR code for direct scanning of the APP, you need to enter the APP and then search for the APP to download, which is not very direct.

OK, Download and open the APP, and then set personal basic information such as gender, age and height. The left and right hands are used to this setting, because some players hold the racket with their left hands like Lin Dan.

OK, Enter the home page. There are four items in the middle of the home page, mainly showing the video of badminton and the evaluation of equipment.

OK, First of all, we need to connect the sensor to the mobile phone, shake the sensor and turn on the Bluetooth of the mobile phone. The advantage of Bluetooth is low power consumption, which is consistent with the use orientation of this small product.

OK, The next step is to test the actual function:

The toolbar at the bottom of the home page, with data statistics on the left

The top part of the data statistics shows four sports records, the bottom part shows the number of shots of each game, and the upper right corner can share data.

Each game can also be marked and deleted by sliding left and right.

At the same time, click each round, and the system will give a report, and then link relevant improvement videos with the report. This is a good design to solve the problem.

Data recording accuracy:

I conducted two tests respectively: 10 kills, 10 catches, and 10 picks (backcourt service).

It can be seen from the data below that the error of the swing times has reached more than 30%, which is mainly due to the fact that in the pick link, after the swing, the return becomes twice. The error of the kill and overhand test data is acceptable, but the statistics of underhand still needs to be optimized.

3D kill:

The maximum killing speed can be tested, and the count of strokes is still accurate. The error of 3D killing practice is slightly large. The rightmost picture appears 3-4 times in 10 times. Friends who have learned badminton know that the last shot of killing must be on the left side (except for left-handed people), but obviously the rightmost picture is wrong, which is an algorithm problem and needs to be improved.

Video measurement:

When signing in for points, they will exchange gifts according to their rankings. It sounds a bit like the recently popular WeChat running. This smart sensor also uses a similar method to compete with all users for rankings, and then win prizes by relying on the former. This is also a good way to urge people to exercise.

Other tests:

Battery life: 5 hours at full power. I usually play every 2 hours, which is just enough for me to play twice. The battery life is not good or bad.

The following is a video of charging.

Finally, a short video of playing football is sent:

Summary

advantage:

Small size, rich accessories

Cache information design is more practical

APP is rich in content, and teaching videos are practical

Disadvantages:

Some counting algorithms need to be improved

General durability of pasting and fixing

This product is suitable for friends with a certain badminton foundation. The killing and upper ball counts are more accurate, and the counting algorithm of the lower pick and other actions needs to be improved, There are many actual deflections in the 3D killing track, and the overall APP has teaching content that is very practical. Fortunately, the overall weight is not large, and the balance point and feel have little impact. If you just want to show the killing speed in the circle of friends, this product can help you. If you only have Hongshuangxi and other supermarkets to take photos, you'd better save the money to buy a beginner's photo, tie up another YYBG65 22 pounds, and practice your steps and basic movements.