introduction

Introduction to the development of tachograph:

The tachograph originated in Germany more than 80 years ago (1934). It was then called "paper disk type tachograph" (paper materials are used to kill all tachographs on the market now), also known as the car black box. The first electronic tachograph was not born until the late 1990s. DASH CAM has been introduced into China since about 2009. It has developed rapidly in China in just eight years. At the same time, with the development of technology becoming mature, consumers' requirements for the DASH CAM are also constantly improving. How to choose a "reliable" DASH CAM has become a big puzzle for the majority of car owners. Especially at this stage, a large part of Chinese car owners are first-time buyers. They have no experience, and blindly choosing high price or low price products must be a very irrational choice. Today's nap will introduce you a "reliable" tachograph from the perspective of rational consumption.

"Xiaoyi Smart Rear View Mirror Pilot (3G)"

Main function configuration of the product:

● MediaTek A7 4-core 1.3GHz high-performance processor

● 2 million pixel image sensor chip, 1080P FHD full HD driving record

● 6.86 "large screen+capacitive touch operation

● Customized navigation of YUNOS+mirrors

● Voice intelligent interaction

● Collision video locking

● Support GPS positioning, accurately record track and mileage

● Built in shrimp music, Himalayan online listening

Product packaging and unpacking experience

First of all, thank you Love to play computer games Valuable evaluation opportunities given by the platform; First, look at the external packaging of the product. The packaging uses a rectangular box with clear edges and corners, and does not use any fancy surface modeling.

In the field of industrial design, the standardized rectangular packaging is the most commonly used shape, which is easy to place and transport. Compared with some special-shaped packaging, it is more convenient for product storage and transportation. There is a gap in the middle of the package. Starting from the gap, you can easily open the package. I think this is very humanized. Many product packaging designs do not leave gaps. The packaging design is too tight and damped too much. At the same time, due to the atmospheric pressure (negative pressure inside the package) when opening the package, it is often difficult to open the package, Anyway, when you are having a bad nap, you just want to throw it away.

On the back of the package is the identification label of the basic product specifications. Here we take a nap to remind consumers that when they buy goods online, they should confirm the contents of the label as soon as they get the product, and check whether it is consistent with the goods they buy. For example, Xiaoyi's rearview mirror has two versions, WIFI version and 3G version, with slightly different functions.

From the pictures above, we can see that the outer package of the product was hit a little hard by the express boy. At first, I was a little worried about whether the inner product would be damaged. After unpacking, I finally put down my heart in suspense. It seems that the anti drop design of the package is OK. Soft cushion sponge is wrapped around and below the product, which can effectively cushion the impact caused by falling.

Take out the recorder body, and then take a look at the items contained in the package. Including: Xiaoyi smart rearview mirror navigation version (body), car charger, GPS antenna, fixing strap, instructions and TF memory card.

The user manual of the product has a detailed introduction to the parameter structure, product features, installation and use methods and precautions of the rear-view mirror for your reference. It is recommended that you read it carefully before driving, especially the understanding of its features and functions, so that you can use it more easily.

  Talk about details

First, take a look at the appearance of the product. When the mirror screen is not lit, the overall feeling of the mirror is very strong. There is no disharmony because there is a screen in the middle of the mirror. Even when the light is not strong, you need to carefully observe to find that there is a 6.86 inch large screen in the middle of the mirror.

The surface of the recorder is covered with a whole piece of reflective glass. The glass is not completely embedded in the recorder frame, but slightly higher than the outer frame by about 1mm. The glass edge has chamfer and smooth transition processing, which is now widely used in mobile phones called 2.5D glass. Due to the reflective effect of mirror glass and the refraction effect of light at 2.5D glass chamfer, the product looks more gorgeous under the light, giving people a bright feeling.

The back of the product is a camera, a strap holder and a card insertion prompt label. Although the material of the back shell is not metal, the surface treatment is smooth, the gap width at the junction of the frame parts is uniform, and there is no obvious burr in the groove. It can be seen that the manufacturer has made great efforts and costs in the manufacture of abrasives.

The middle part is specially made with a banded imitated metal wire drawing texture, which is highly simulated both in appearance and feel, so when I began to nap, I mistook the back cover for metal. However, after careful consideration, compared with plastic, metal materials must significantly increase the product weight and production costs, which are difficult for consumers to accept on the tachograph. The increase in weight will burden the fixation of the recorder, and the product is more likely to shake when driving. It goes without saying that price has always been one of the most important considerations for consumers.

As a nap reminder, please insert the memory card and SIM card according to the instructions on the back of the product to avoid the wrong direction of card insertion, otherwise it may be difficult to remove the card. The above experience is a personal experience of nap. Stop talking, I'll cry first.

For a product whose main function is the DASH CAM (which is how the nap locates it anyway), whether the camera has a certain performance is crucial. The camera specifications are as follows:

Camera pixel: 2 million pixels

Sensor: 3.0 × 3.0 μ m, 3900mV/lux.sec [high sensitivity image sensor]

Aperture: F2.0

Optical lens composition: 5G+1 IR infrared filter

Perspective: FOV(D): 140

The camera base is equipped with a universal joint, and the direction can be adjusted in multiple directions, from top to bottom, from left to right. The maximum adjustment angle is about ± 20 degrees by visual inspection, which can meet most customer needs. The universal joint damping design is excellent, and the camera will not be too loose, which will cause displacement when encountering bumps while driving, and it will not be too tight, which will make it difficult to adjust. The larger aperture and infrared filter improve the night shooting performance of the product.

This camera specification can be said to be standard, and it is the preferred configuration of the top few tachograph manufacturers in the market. Since everyone chooses this configuration, it must be reasonable.

Let's analyze. As we all know, high resolution means high code rate, that is, the higher the resolution of video recording at the same time, the larger the storage space occupied. We need to equip a memory card with larger capacity and faster storage speed. At the same time, the processing of image data with larger resolution must be supported by a more powerful CPU processor. At the same time, the more powerful CPU will also bring about a series of problems, such as higher costs and enhanced heat dissipation.

Therefore, according to the use environment characteristics and requirements of the tachograph, 1080P resolution and 30fps speed ensure the basic video clarity and shooting speed, and ensure that the appearance characteristics of surrounding vehicles, license plate information, etc. are photographed clearly when the code rate is not very high. The 140 degree wide-angle lens ensures that the recorder can effectively cover three lane vehicle images, including left and right lanes.

After professional inspection of many commercially available tachographs, the general 1080P resolution (140 degrees wide angle) tachographs on the market can capture the license plate information of vehicles within about 6 meters. This is sufficient for most applications. In addition, it is measured that Xiaoyi's video recorder occupies 51.4M of storage space per minute. If you buy a 32G memory card (the actual space is 28.9G), you can store about 9.6 hours of video. It supports 64G memory cards at most. I think it is conditional to buy a larger memory card.

On the top of the rearview mirror, from left to right, there are MINI USB power interface, AV-IN interface, SIM and TF card slot, and GPS antenna signal interface. The MINI USB power supply input requires a power supply of 5V and a current of 2A or more. The current of the original car charger equipped with Xiaoyi is 5V 2.5A. It's a pity that Xiao Ant's car charger is not a universal USB interface, but a direct out of line charger, so it can't charge the mobile phone. If you want to supply Xiao Ant's rearview mirror and mobile phone at the same time, you need to purchase a one drag two adapter plug to achieve this. The AV-IN interface makes it possible to add a rear camera, although not many people use it.

GPS antenna, which is not very satisfactory for nap, is equipped with a separate GPS antenna in order to receive GPS signals. It is not small, and needs to be fixed in an open position through 3M double-sided tape. Although the fixed position is relatively open, there is also an additional cable out.

There is a switch button at the bottom of the product. Press this button briefly to pause the screen when the machine is turned on, and press it for a long time to display the "Shutdown Restart Mute" option, which can be selected by touching the screen. The MIC hole is on the left of the button. Since the rear-view mirror is installed at a high position, both the button and MIC are designed below the product, which is more reasonable. At the same time, the button is located directly below the screen, and the surface is designed with a concave and convex texture, so that the driver can quickly touch the button during driving or in a dark environment.

The small ant intelligent rear-view mirror is fixed with straps. It is completely designed for fixing it on the original rear-view mirror of the car. It is simple, efficient, stable, and easy to remove. It is widely recognized and affirmed by users.

The installation process of Xiaoyi intelligent rear-view mirror to the car is relatively simple. The mirror is directly fixed to the original rear-view mirror with the straps in the accessories, and the angle is adjusted according to the personal driving habits.

Test the performance

The system will prompt you to authenticate and activate the SIM card when you use it for the first time.

Scan the QR code with WeChat, perform real name authentication and activate according to the prompt. Unfortunately, it cannot be activated immediately after submission, and it needs to wait 1~2 working days. I waited anxiously for the express delivery for two or three days and just got it. I couldn't wait for a nap to test and found that I had to wait again. The whole person was devastated. The actual situation is that the audit was passed after only one day, which is a little consolation.

After the authentication is completed, you can check the remaining traffic on the card on the mobile phone and recorder. It is very considerate to give 1000M free traffic to the new pilot (3G). However, it is worth noting that since the SIM card presented is the data card of the Internet of Things of China Unicom, China Unicom stipulates that the monthly data flow settlement date of the card is 26th, which means that the monthly complimentary flow will be cleared after the 26th of the month. Therefore, if you are about to activate your SIM card on the 26th, you'd better wait until the 26th (the 27th) to activate it. In this way, the free flow will be used up in the next month.

The screenshots of the traffic charges are given to you. Personally, the pricing is reasonable, such as 106 yuan for the 300M/month annual package. It can basically meet the daily navigation, occasionally listen to music, and listen to Himalayan FM programs. For heavy users or local tyrants, please choose the corresponding money burning package.

During the whole test, I felt that the 6.86 inch IPS capacitive screen was sensitive to touch. As a tachograph and navigation device, 1280x480 definition and size were enough.

The DASH CAM function is automatically turned on after the power is turned on, and the recorded video is divided into small videos every 1 minute, named after the recording time point, such as "vid_front_20170914_020806", to facilitate searching. In case of an accident, you only need to search the relevant videos according to the accident time, so as to avoid the tedious trouble of watching for a long time.

There are two resolutions for video recording of the driving record function: 720P and 1080P. Users with small memory card capacity can switch to 720P mode, which can save about 56% of storage space. In addition, you can also choose to turn on or off the voice recording function. Turning off the voice recording function when necessary can protect privacy. From the experience of the product, I think the designers of Xiaoyi are still very distracted in designing products. Why do you say this? The evil nap leaves some space for free imagination.

The mobile phone can review the video function, turn on the rearview mirror wifi hotspot function, use the mobile phone to connect and turn on the rearview mirror app of Little Ant, you can see the video files recorded by the recorder in the album, select the corresponding file to download, and after downloading, the app will automatically transcode and transcode, you can find the relevant video files in the mobile phone album.

The above picture is a screenshot of video recording on the mobile phone.

When the phone is turned on, you can start the voice intelligent interactive system by saying "Hello, Little Ant" anytime and anywhere. For example, if you want to turn on the music listening function, just say "I want to listen to music", and the system will automatically turn on Xiami music and start playing recommended music. You can also search for the music you want to listen to.

Just say "Navigation to * *" to open the navigation. This customized navigation software of Goddard is really very convenient. The voice interaction system frees your hands from the tedious input information of staring at the screen, which saves time and greatly improves the safety and fun of driving.

Since navigation requires map data support, there are two options for how to obtain map data. The first is to directly use the SIM card to link to the network for real-time download, or you can use the SIM card to download the offline map package at one time. For example, the offline map package in Tianjin where the nap is located requires 72M of data. The second kind of "zero flow update" is to use the computer to download the offline map package to the TF card, open the map and load the offline map data of the TF card.

Here's a quick nap to remind everyone that although the offline maps of the separate car version and car mirror version of Gaode Navigation are unified, the map data of the car mirror version was not found after a long nap on the official website of Gaode, only the offline map of the car mirror version was downloaded, so the nap speculated that the two versions were universal, so he called Gaode customer service to verify that they were indeed universal, After a nap, I also found that the voice of Gao De's customer service sister was very sweet...

There are still some functions of this product that haven't been mentioned in the nap, leaving some suspense. You can start and experience them yourself. Here, the nap only tests the main functions of this product.

Finally, we will show you two groups of videos taken during the day and at night through dynamic pictures to see the picture quality of the recorder. It can be seen that during daytime driving recording, the picture is relatively clear and the purity is also high. The license plate number of the vehicle 7-8 meters ahead is clearly visible. However, at night, due to the illumination of the light and the dark environment, the quality of the pictures recorded by the recorder declined a lot; In particular, the shooting effect of the edges on both sides of the screen is more obvious, but it is acceptable compared with the product price. In general, both daytime and nighttime driving records can be used as a guarantee to provide safety for users to travel. Even in case of traffic friction accidents, they can also become strong evidence.

summary

Xiaoyi's smart rear-view mirror uses a 2 million pixel 140 degree wide-angle camera, which is a relatively mainstream configuration at present. It has better balanced the relationship between customer demand and product price, and can meet most customers' requirements for the use of the DASH CAM. In addition, based on Alibaba's customized YUNOS system, the embedded intelligent voice control function runs smoothly with the support of MediaTek's 4-core high-speed CPU, which can easily turn on navigation. The 6.86-inch large screen should have no pressure on navigation. At the same time, Xiaoyi cooperates with Unicom with the accompanying IoT SIM card, which can open online Xiami Music, Himalayan FM and other apps after connecting to the network. At the same time, it can also achieve online system updates and navigation road data updates, providing infinite possibilities for the subsequent function improvement and improvement of the product.

Put forward several suggestions for improvement:

1. The GPS antenna is built in, saving the trouble of wiring.

2. It is hoped that the later products can support the common mobile phone SIM card to access the Internet.

3. Improve the Bluetooth module specification and use Bluetooth 4.0 or higher chips (currently 2.0).

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