Wireless doorbell makes sense for a villa or large apartment. In addition to the function of notifying guests of a wireless doorbell, the wireless doorbell also has an important function. When there is no one in the house, the doorbell action will use the network to transfer information to the owner's mobile phone. This intelligent wireless doorbell will tell the owner about the visitor information and home Safe or not. Let ’s introduce the principle of wireless doorbell and the use of smart doorbell.
The three components of the wireless doorbell form a wireless system, and the various parts of the system communicate with each other to implement functions such as voice intercom or visual voice intercom, monitoring, taking pictures, and unlocking. Xiaobian here introduces the principle of wireless doorbell, I hope to help everyone understand the principle of wireless doorbell.
The working principle of wireless doorbell outdoor unit is:
(1) Use a microphone to collect voice and a camera to collect image signals, and convert the collected analog signals to digital signals. The main processor performs processing such as compression and enhancement of voice and digital image signals, and then transmits the compressed signals through a wireless signal transmitter;
(2) transmitting control signals generated by peripheral devices such as doorbell buttons, etc. through a wireless signal transmitter;
(3) The wireless signal receiver receives the wireless voice signal transmitted from the indoor unit, and the main processor decompresses the received voice signal, and then converts the digital-to-analog signal to an analog signal and plays it through the speaker;
(4) The wireless signal receiver receives the control signal transmitted from the indoor unit. The main processor converts the received control signal into a lock control command and transmits it to the unlock controller through a short-range wireless transmitter (usually using the Zigbee protocol).
The working principle of wireless doorbell indoor unit is:
(1) The wireless signal receiver receives the wireless voice or video signal from the outdoor unit, the main processor performs processing such as error and decoding on the received signal, and then displays the decoded video signal through the display screen, and the decoded voice signal D / A converted to analog signals, played through speakers;
(2) The control signals generated by the various peripherals of the indoor unit such as the call, unlock, and other buttons are transmitted through the wireless signal transmitter;
(3) Use a microphone to collect voice signals and convert the collected analog signals into digital signals. The main processor compresses the voice signals, and then transmits the compressed signals through a wireless signal transmitter.
Unlocking controller is mainly used to realize wireless remote unlocking. Embedded in the unlocking controller are various intelligent lock controllers (electrically controlled locks, magnetic locks, mute locks, fingerprint locks and password locks). When the unlocking controller receives the wireless control signal from the outdoor unit, it generates a signal for unlocking by decrypting and decoding, thereby remotely unlocking.
With the video doorbell, the guest at home calls the resident through the host of the unit door downstairs, and then talks with him. The resident opens the unit door, so that the host of the community can receive the alarm signal of the resident at any time. The shape is also very beautiful, becoming a popular system in the community.
Is the smart doorbell easy to use?
Smart doorbell is to add some intelligent functions to the doorbell, such as WIFI or Bluetooth connection, added webcam and microphone system, etc. Therefore, the advantage of the smart doorbell is that you can instantly view the person at the door and interact with each other or even remotely.
Because the doorbell has a camera function, the quality of the camera has become the focus of investigation when purchasing a smart doorbell. After all, the camera function is concerned about the safety of the door. The camera needs to pay attention to the problem of pixels. The higher the pixels, the clearer the image, so the higher the resolution and the higher the pixels, the better. Of course, the relative price will be more expensive. In fact, we need to pay attention to the problem of nighttime imaging. Most of the situations involving home security may occur at night, and the imaging effect of the camera on the doorbell at night can be related to the security of the home. We need to pay attention to whether the imaging is clean and the details are displayed. how is it.
The remote association function is also a key to the smart doorbell. When someone presses the doorbell at the door, can the associated mobile phone receive the information in real time and check the situation at the door through the screen, the speed of information transmission and the efficiency of instant messaging. It is related to whether the doorbell works well.
The smart doorbell's battery is usually an external power supply. After installation, it needs a plug to work. Some smart doorbells have a battery box. It is easy to install and does not need to consider installing a plug or plug-in board at the door, but it also means that the smart doorbell must consider the battery life and the alarm function of low battery. When the battery is low, the user should replace the battery to avoid The smart doorbell function has failed.
Whether it is easy to install is also a point to consider. The installation is too complicated, or it is prone to problems during installation, it is difficult to install and use quickly, and it cannot be quickly and smoothly associated with the mobile APP. .
Smart doorbell and smart door lock are equivalent to the first layer of defense of home security. It has the camera function and microphone function that smart door lock does not have. It can be associated with the door lock to function as a home security system. For external products, in addition to the various functions mentioned above, you also need to consider whether there is a waterproof function, whether it will affect its use when it is raining, and so on. Although the door lock is a small product, it has nothing to do with the family, so choose carefully.