Last year, Dajiang 3 of Dajiang led the entire consumer drone market to become the sales champion. In March of this year, the Elves 4 launched by Dajiang added a lot of technological innovations, which made people shine. So can Elf 4 Inheriting the advantages of the previous generation of products, continue to be the best-selling drone? Let's take a look at the Wizard 4 together, verify its automatic obstacle avoidance, intelligent flight, a variety of intelligent control modes, speed flight, etc. Is black technology really so fun?
Dajiang Phantom 4
1. What are the technological innovations?
In 2016, drones are no longer a particularly fresh technology toy. In the past, flight control became the dominant market in the drone market. Today, flight control has become very basic, no longer distinguishing the strength of drones. The decisive factor, and more is to distinguish the individual intelligent function of the drone, Dajiang has increased a lot in the intelligent flight.
Dajiang Elf 4
1, intelligent obstacle avoidance
At the beginning of 2016, at CES, the automatic obstacle avoidance function became another new highlight of the drone. I remember that at that time, Dajiang did not release new products for automatic obstacle avoidance, although it was released as early as August 2015. The developer platform M100 uses the GUIDANCE intelligent obstacle avoidance accessory, but it is eager to see this function on the consumer drone. On March 5 this year, Dajiang officially released a new wizard 4, which is equipped with automatic obstacle avoidance function. The principle still uses the binocular ranging method, but the detection distance is longer than the GUIDANCE accessory, reaching a distance of 0.7 meters to 15 meters, and the flying speed of the drone can be controlled according to the speed of the flight, and the time of stopping is adjusted. To avoid collisions, if you want to understand the principle of binocular obstacle avoidance, you can refer to the principle is actually very simple! Automatic obstacle avoidance is not a special cow. Below we will test this binocular obstacle avoidance system to tell everyone how easy it is.
Dajiang Elf 4
On the other hand, competitors, although Yueec's Typhoon H, which has won eyeballs at the CES 2016 exhibition, has passed the past five months, and has not seen any products. It has been disclosed by online users at the beginning of the CES show video. There are strict requirements for light adjustment, and it is impossible to get out of the laboratory. For his sale, only in an English promotional material outside Yuneec, a drone without RealSence obstacle avoidance function was found, and the price is only as high. 9000 yuan, compared with the DUA in Dajiang, the cost of the Elf 4 is significantly higher.
Dajiang Elf 4
2, intelligent flight
The new Elf 4 will be a cross-generation drone product, bringing together many black technology features to make people shine. The introduction of "computer vision" and "machine learning" technology has made consumer-grade drones more intelligent, with the ability to think and learn, and to better understand the user's mind. "Intelligent Tracking" is the biggest embodiment. Compared with the GPS positioning on the remote control by the previous generation, when we control the drone, we no longer need to carry around with the remote control. By controlling the phone or iPad of the Wizard 4, we choose After the object to be tracked, the 5D image (camera, 2 visual positioning, 2 obstacle avoidance) sensors on the drone are used to draw a 3D stereoscopic image comprehensive calculation activity route, and smooth tracking shooting is selected. In actual flight, the Elf 4 moves back and forth with the footsteps of the model on the T stage, or irregularly running, always maintaining a fixed distance, and the camera lens is firmly locked on the object to be followed.
Dajiang Elf 4
3, a new way of control
Dajiang Elf 4 gives the Elf 4 more choices in the control mode. It can realize the drone control through the remote control, and also adds a new “pointing flight†mode to directly control the unmanned from the visual. The flight direction of the machine, forward, backward, leftward, rightward, the logic of the control is in line with the public's thinking, simple and extremely easy to use. For the friends whose left and right hands are not flexible, the "pointing flight" function will give you a more direct control method. You only need to click on the screen and pull it left and right. The wizard 4 will automatically fly toward your target. When encountering obstacles , Wizard 4 will be very user-friendly to choose to bypass or stop the forward instructions.
Dajiang Elf 4
4, sports mode
In the Elf 4, a new sport mode has been added, giving the Elf 4 a higher sensitivity and speed. The maximum vertical ascent speed is 6m/s, the drop is 4m/s, the horizontal direction is 20m/s, and the tilt angle is increased from 30° to 45°. The handling feel is also very sensitive, and the flying posture will be more colorful.
Dajiang Elf 4
5. Aerial photography enhancement
On the Dajiang Elf 4, the PTZ camera was embedded in the fuselage of the drone, making the drone more beautiful, not only handsome, but also better. The sprite 4 uses a new 94° viewing angle (equivalent to 35 focal length of 20mm) and f/2.8 aperture lens. The lens distortion has a significant drop compared to the previous generation, which is reduced by 36%, and the ratio of color difference is Reduces by 56% and significantly eliminates vignetting, giving you precise detail every detail. Not only that, Elf 4 also added 1080/120p slow-motion playback to make shooting more interesting.
Dajiang Elf 4
6. Strengthening of basic functions
Due to the addition of many new features, Dajiang Elf 4 will also consume more battery power. The battery of Elf 4 has also improved a lot, and it has surpassed the previous generation's battery life, reaching 28 minutes. Greatly improve the fun of consumers when they use it. For the first time, the design concept of flight control is adopted. It is equipped with dual vision communication system, dual IMU and dual GPS signal components to avoid the situation that the drone is broken after one of the sensors fails, which greatly improves the reliability of the drone. At the same time, the height of hovering indoors has also increased from the original 3m to 10 meters.
Summary: From the parameter point of view, there are always a lot of complicated parameters, watching the white is confused, but in general, the biggest improvement of the Elf 4 is in the automatic obstacle avoidance system, intelligent tracking, and pointing flight, for the consumer class Among the drones, only the Elves 4 of Dajiang can make such a powerful technique, and below we will look at how the Elf 4 can play from the perspective of a user.
Second, Dajiang Elf 4 appearance
Dajiang Elf 4 is a four-axis rotorless drone. Compared with the Elf 3, the Elf 4 is more streamlined, the body becomes more fat, and the height and width are unchanged. The outer shell is made of lustrous green plastic. White, removed the two gold bands of the previous generation, Xiaobian, I saw that I would like to paint a graffiti with a brush on it, to make a personalized order, but the paintings are limited, so I think about it, but of course in dji. The official website also provides customized services with personalized appearance. Interested friends can pay attention to it.
Dajiang Elf 4
Compared with Elf 3, Elf 4 has a more generous packaging, a gray foam box with a hand-held pull ring for easy travel, and can carry 3 fast batteries (1 in the fuselage + 2 in the box) In the battery compartment).
Dajiang Elf 4
Dajiang Elf 4
In the accessories of the Elf 4, similar to the previous generation, including the fuselage of the Elf 4, battery, remote control, 8 blades placed in the storage bag, charging power, data cable, data cable adapter and multi-language Many manuals are used.
Dajiang Elf 4
The Dajiang Elf 4 adds a fan-hot hole below the four rotors, below the fuselage, to avoid the problem of fan-controlled heat ingress due to rain during flight.
Dajiang Elf 4
Dajiang Elf 4
Elf 4 uses a new ultra-low distortion lens, which presents an oil-green coating on the lens coating, which reduces the color deviation caused by dispersion and reduces the ratio of color difference by 56%. The lens distortion of Elf 4 has a significant drop compared to the previous generation, which is reduced by 36% and significantly eliminates vignetting.
Dajiang Elf 4
The Elf 4's propeller adopts a new push-type installation method, which greatly reduces the time for installing the propeller. The four propellers are all good, basically solved within 1 minute. After proficiency, the operation can be completed in 30 seconds.
Dajiang Elf 4 vs. Elf 3
Dajiang Elf 4 vs. Elf 3
Dajiang Elf 4 vs. Elf 3
Dajiang Elf 4 vs. Elf 3
Dajiang Elf 4 vs. Elf 3
Not only does the appearance of the Wizard 4 change, but also the function buttons on the top of the remote control have been adjusted. The button on the upper right corner of the Wizard 4 has become a pause button. When the flight speed of the drone is too fast, the pause button can be quickly pressed. Let the drone hover in the air.
Dajiang Elf 4 vs. Elf 3
Dajiang Elf 4 vs. Elf 3
On the mode button of the Wizard 4 remote control, compared with the previous generation, although the 3rd flight mode mode is maintained, the PAF of the Wizard 3 becomes the PSF, the A file and the P file are merged, and the added S file is the Sport. The meaning, the sport mode, in this mode, the drone's control becomes more aggressive, the flexibility is very high, and because the speed is too fast, the automatic obstacle avoidance function will not be activated.
Dajiang Elf 4
Dajiang Elf 4
The new battery module is used in the Elf 4, the appearance becomes bigger, and the button part becomes more refined. The power switch button is more like the iPhone's home button. The overall design matches the body, and it still has a rounded appearance.
New battery interface at the bottom of the battery (Left 3 battery on the left and Wizard 4 battery on the right)
Brand new battery shape (left for Elf 3 battery, right for Elf 4 battery)
Ventilation is designed on the side of the brand new battery (Left 3 battery on the left and Elf 4 battery on the right)
More refined battery button (Left 3 Elf Battery, Right Elf 4 Battery)
In terms of battery life, the battery capacity has been increased from 4480 mAh of Wizard 3 to 5350 mAh of Wizard 4, which not only provides sufficient power for the newly added obstacle avoidance system, but also increases the battery life from 23 minutes to 28 minutes. Looking at the extra 5 minutes, in the Age of Elves 3, it often takes more than 3 batteries to fly, but on the Elf 4, basically 2 batteries are enough.
Third, automatic obstacle avoidance
1, automatic obstacle avoidance
The automatic obstacle avoidance system on the Dajiang Elf 4 uses the principle of ranging similar to the human eye. Through the image difference between the eyes, the application of the trigonometric function is used to measure the linear distance of the object. For details, please refer to the principle. simple! Automatic obstacle avoidance is not a special cow. Let's take a look at the effect of this obstacle avoidance system.
Test one: white wall
The Elf 4 is equipped with a binocular obstacle avoidance system. The white wall can be said to be a breeze. At 7m, there is already a distance indication of obstacles. During the control process, when it reaches 3 meters, it stops flying and cannot continue. Close to ensure the safety of the drone.
Test 2: Pointing to the stairs in flight
When the Elf 4 was flying, it encountered a building. The computer detected an open area above it. The Elf 4 chose to bypass it and successfully avoided the obstacle.
Test three: mirror
Considering that the above-mentioned binocular obstacle avoidance system is similar to the human eye, we consider the shortcomings of the human eye. The distance to the mirror surface is double the distance, and the mirror is measured against the drone. As I expected, the distance sensing of the mirror is relatively poor, and there will be a beating situation. When the collision occurs, the distance of 1m is measured and the foreground is stopped.
Fourth, intelligent tracking
The intelligence is to use the 5 images (camera, 2 visual positioning, 2 obstacle avoidance) sensors on the drone to draw a 3D stereoscopic image comprehensive calculation activity route, and select smooth tracking shooting. In actual flight, the Elf 4 moves back and forth with the footsteps of the model on the T stage, or irregularly running, always maintaining a fixed distance, and the camera lens is firmly locked on the object to be followed.
As the name implies, intelligent tracking, with a certain learning ability, will also have a certain learning time for the moving track of moving objects. When the first test flight, Xiaobian can not identify the trajectory of the author well, let Xiaobian White ran for a while, but the second time, the response of Elf 4 was relatively stable. Similarly, in the third attempt, Elf 4 also tracked the movement of Xiaobian well.
In the second intelligent tracking, the drone has been able to detect my movements. In the end, because I detected obstacles in front of me, I did not choose to follow the path, but adjusted the angle of the PTZ camera, but always It is aimed at the author's movements, and when the author walks back, perhaps because of the specular reflection of the glass, the Elf 4 seems to admit the wrong person and has to try the third time.
Five, pointing flight
In the test effect of the pointing flight, it is really easy to get started. The white cursor in the video is the position of the finger touch, click on the part above the red line, and then press the “GO†wizard 4 to move toward the target with more locking. In the middle part, there is a horizontal lever, the finger is pressed and dragged, the direction of the drone can be controlled, the up and down drag is controlled to rise and fall, and the left and right is left to right, in the video Finally, the front of the drone is a building, and the automatic obstacle avoidance system of the Elf 4 also plays a corresponding role, flying upwards to avoid obstacles, but fortunately did not hit the small series.
VI. Violent flight test flight mode
Dajiang Elf 4
In the Elf 4, a new sport mode has been added, giving the Elf 4 a higher sensitivity and speed. The maximum vertical ascent speed is 6m/s, the drop is 4m/s, the horizontal direction is 20m/s, and the tilt angle is increased from 30° to 45°. In the actual trial, it is really very fun, and the steering wheel is arbitrarily moved in the air. The Elf 4 dances in the air, and the speed of the forward and backward is more of a racing back.
Seven, Dajiang Elf 4 real shot samples
Dajiang Elf 4
Dajiang Elf 4
Eight, PConline evaluation room reviews
Summary of the advantages and disadvantages of Dajiang Elf 4
Advantages Disadvantages
1, the intelligent obstacle avoidance success rate is very high
2, 28 minutes battery life
3, intelligent tracking
4, higher security
1. Intelligent tracking requires a certain amount of time to learn
2. Defects in the obstacle avoidance effect of the glass mirror
Dajiang Elf 4, as expected by the author in the early stage, is very powerful. It is often used during the flight process. After the automatic obstacle avoidance, the flight safety of the drone is greatly improved, and the drone collision occurs when no image is transmitted. In the evaluation, the obstacle avoidance of Dajiang Elf 4 can be said to be very sensitive. Except for the smooth mirror surface, other situations are very accurate to estimate the distance of the obstacle in front. It is indeed a good drone function. In the intelligent flight, because the first generation of intelligent sensing system is still in the normal situation, it is still very sensitive to track the object, and the obstacle avoidance system of the drone works at the same time, so that the whole process is very safe. However, in some object recognition, it still needs to continue to improve, but these can be done through software upgrades, after all, it is still a baby. Speaking of the price, the pricing of 8999 is not close to the people. It is more expensive than the previous Elf 3 Professional Edition, but compared to the Elf 3 full range of products, the function of Elf 4 can be said to be beyond imagination. The fare is out, and compared to other brands of drones, at the same price point, there seems to be no drone that can match this function.
In general, for the novice, the Elf can give you a one-stop drone experience, not only safe, but also easy to use, the effect is also very good, the craftsmanship must first sharpen its tools, want to be in aerial photography There are some studies on the road, but there is no experience, a good machine will give you a more convenient film.
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