The intelligence and progress of science and technology are also reflected in elevator weighing technology. With the increasing popularity of elevator applications, the market has begun to pay more attention to elevator weighing technology.
Heavy technology also has greater requirements. As an important guarantee for the later operation of the elevator, elevator weighing technology plays a very important role in elevator design. As an important tool for elevator weighing, load cells also play a very important role. As the application scope of smart elevators continues to expand, the frequency of load cells being used in smart elevators is also expanding.
Application status of smart elevators
The popularity of smart elevators has greatly facilitated passengers. They are mainly used in high-end buildings with a large flow of people, such as in cities.
Most shopping malls, hotels, guesthouses, etc. are equipped with smart elevators. However, the actual results achieved are not ideal. Due to the large flow of people in public places and the uneven quality of personnel, the probability of damage to smart elevators is undoubtedly increased. Through interviews and surveys in public places where smart elevators are installed, such as local shopping malls, the data we obtained shows that the number of invalid operations performed by elevators confirms that the frequency of elevators executing invalid instructions caused by artificially pressing elevator buttons is very high. At the same time, while executing invalid instructions, it increases the time cost and causes inconvenience to passengers getting on and off the elevator. This is contrary to the original intention of smart elevators to bring convenience to passengers. The same situation occurs when passengers wait too long for the elevator or leave the elevator boarding point due to temporary matters, and fail to cancel the instructions for the elevator in time. This will also cause ineffective opening and closing of the elevator door and the inefficiency of getting on and off the elevator. This is undoubtedly a problem. This increases the operating costs of the elevator and the waiting time for other passengers. From point to point, it can be seen that the current application effect of smart elevators in most areas of our country is not ideal. Smart elevators have also failed to achieve the goal of truly convenient passengers, and have also brought greater operating costs and failure risks to elevator investors. . Through the above application analysis of smart elevators, we urgently need to change this status quo through certain methods. The following mainly studies
The purpose is to realize timely elevator information transmission through load sensors, help smart elevators identify invalid instructions, save elevator operating costs, facilitate the majority of passengers, and make smart elevators more convenient.
Working principle of the load sensor: The use of the load sensor is mainly to realize the identification of invalid instructions by the intelligent elevator through the weight change inside the car, thereby reducing the elevator operating cost and improving the operating efficiency. The elevator load sensor is an important part of the elevator weighing device. Other components include the elevator load sensor, signal amplifier and elevator main control board. The elevator load sensor is installed at the end of the traction wire rope. In order to visually detect the weight of the elevator, the signal sensor and the signal amplifier are connected by a shielded cable. There is also another shielded cable between the signal amplifier and the elevator main control board.
cable connection. The resistance strain gauge is pasted on the elastic sensitive element to form an electric bridge in an appropriate manner, thereby converting the mass of the object into an electrical signal. It mainly consists of two parts. The first part is the elastic sensitive element, which converts the pressure and mass of the measured object into the strain value of the elastomer; the second part is the resistance strain gauge as the sensing element, which synchronizes the strain of the elastomer. is converted into changes in resistance value, and then output after corresponding conversion.
3.2 Selection of load cells
Regarding the sensors used by smart elevators to meet the above needs, we have made the following considerations. Regarding the cost of weighing sensors,
We made a detailed analysis of the original conditions such as the quality of the elevator itself and the elevator weighing system. We chose to implement the final selection and debugging of the load sensor by implanting the signal input end of the microcontroller. The steps for implanting a microcontroller are not complicated. We first find the original sensor placed under the car, and carefully implant the microcontroller in the sensor. Be careful not to damage the original sensor, otherwise the gain outweighs the loss. After implantation, use The cover gently covers the entire sensor, so that the load cell completes the laying work in the smart elevator.
3.3 Introduction to microcontroller applications
When the smart elevator embedded with the microcontroller program is running, it can automatically accumulate the number of people getting on and off the elevator and the floors it passes.
If the number of people going up and down in the floor of this command is more than the number of people in the car of the next command, then the sensor will detect this change, and the elevator will perform the operations of lifting the floor and opening and closing the elevator door. The number of people in the car is the same as the number of people in the car for the next instruction. This can indicate that someone has pressed the elevator floor number multiple times inside the elevator, resulting in the existence of invalid instructions. The sensor can effectively identify these invalid instructions and automatically filter them. The elevator will not respond to instructions inside the elevator, but will only execute instructions outside the elevator. This operation will undoubtedly reduce the elevator's
Reduce operating costs, save elevator operating time, improve efficiency, and ensure passenger convenience.
4 Advantages of optimized smart elevators
Compared with the smart elevators currently on the market, the efficient smart elevator designed in this article has the following advantages:
(1) Intelligent judgment and automatic cancellation of invalid operations improves the operating efficiency of the elevator and saves electricity;
(2) Intelligently calculate the load capacity and use ordinary traffic light display methods to facilitate passengers to choose their own way to go up and down stairs, saving passengers valuable time;
(3) Modern smart elevators can be realized with small improvements (adding micro-load sensors and microcontrollers) without spending a lot of capital costs. It has good market prospects.
With the continuous development of the elevator industry, whether in production or in life, the application of elevators is becoming more and more widespread, and smart elevators
Elevators came into being, but various problems arose during the put into use of smart elevators, which will increase operating costs and operational risks. This article uses the identification of the weight of the car in elevator weighing technology to identify the validity of the elevator instructions issued inside the car, thereby effectively avoiding invalid instructions during elevator operation and achieving effective operation of the elevator. It is hoped that through the discussion of this article , can provide safer and more reliable guarantee for elevator design.