History of the presence machine
The first attendance device was called punchy, this type of attendance device was called key and paper tape. This device was a time recording machine. This device printed the exact time of the traffic on pre-printed paper strips, each of which was specific to one of the personnel. In fact, each of the personnel recorded their arrival or departure time by entering their own number.
The second series of Panchi attendance devices was the D attendance device. In these types of devices, a large metal circle was embedded on which the number was inserted. A hand was embedded in the center of this metal circle. Each person should place the hand on his own number and press it to register his traffic. Then the machine entered the current time in the papers of each number that was embedded inside the machine.
The third and developed type of time attendance devices were card time attendance devices. In this device, special sheets were designed for each worker or personnel, and each person was required to enter or leave according to a recipe, put his sheet inside the machine, and the machine would insert the time of entry or exit in the desired place. did In fact, this device only printed the current time in a certain place.
In all the mentioned devices, at the end of each month, someone was required to check the exit slips and had to calculate each person's salary. But there were still problems. One of those problems was the speed of entry and exit registration; In the complexes that included many employees, it led to long queues at the time of entry and exit of people, and the machine was not responsive to all the people.
So the companies needed a new and hassle-free technology to be able to do their management work faster and more carefree. For this reason, the first fully automatic time attendance device was released to the market in 1316 (H). In this device, the calculation of personnel working hours was easier, faster and much simpler, and in a way, it caused a revolution in this technology.
Cards
Since the beginning of the formation of attendance and absence devices, the use of cards has been one of the basic methods to record attendance. Using the card makes authentication faster and easier. The cards supported by attendance devices are RF-id and MiFare. These cards only contain the personnel code of the holder and by placing them in front of the device, the time of entry or exit for that person is automatically recorded in the device.
The device contains an electromagnetic chip that, by placing the card in front of it, identifies the card and registers the person's movement. Ease of user interface, speed and low cost are among the positive components of these devices and they have attracted the attention of many companies. But the biggest disadvantage that can be taken from card attendance devices is the possibility of very easy fraud in them.
Fraud is possible in such a way that any person can register his traffic record by another person or by forging a card, he can act against the rules established in his work group. Also, another problem of these devices is the loss of the authentication card by people. Because until a new card is prepared, the card holder will not be able to register traffic. So, if we want to put together all the positive and negative components of card attendance devices
Benefits:
Simple user interface;
High speed for authentication and traffic registration;
suitable for busy complexes with high personnel;
Affordable price (lower than all attendance devices);
Biometric presence and absence devices
Certainly, if authentication is done by attendance devices through the unique features of each person such as fingerprints, face or palm pattern, there will be no possibility of any fraud or forgery when registering traffic. had Now, if we want to have a complete definition of the term biometrics, we must state it like this: "All the biological and physical characteristics of a human being that the system can measure and recognize automatically are called biometric characteristics". All the devices that are used to identify a person using mathematical algorithms, take unique and fixed impressions from fixed and living organs such as the iris of the eye and fingerprints, which cannot be imitated and in many cases are also unchangeable. data and use them as a password, they are called biometric devices. At the beginning of the introduction of this technology, the systems were mostly under Dos and had little flexibility. With the advent of computer technology as well as attendance software, these devices established their place more widely in companies and offices. By connecting to special software in computer systems, biometric time and attendance devices have made it possible to register and perform calculations on the information received from the device, and make it easier and faster to edit and apply things like leave.< br>
Fingerprint detection devices
When cards were used as a means of authentication, managers of departments and organizations always struggled with problems related to card authentication and the possibility of fraud. The technology of attendance and absence systems should go for an authentication method that is not only unique to people, but also reduces the possibility of fraud to zero. So for this reason, fingerprint identification sensors were used for the first time in attendance devices.
Fingerprint attendance devices are considered as the first biometric attendance devices. Using an optical sensor equipped with anti-scratch glass, these devices receive the fingerprints of each person and by processing special mathematical algorithms, they convert parts of the fingerprints into zeros and ones. Using this method for authentication is very accurate, easy and fast, and the possibility of cheating has been reduced to zero.
Benefits
Cost-effectiveness compared to the technology on the device;
The possibility of fraud is zero;
Face -to -face attendance devices
The second type of biometric time attendance devices was facial recognition time attendance devices. These devices were initially produced with different algorithms, in the first algorithm, the device took different images of the person's face with different angles. When the person stood in front of the facial recognition camera to record his traffic, the algorithm implemented on the device quickly compared the person's image with the images in its database, and immediately after identifying the person, his traffic was recorded.
But in another algorithm, a different and more advanced method was used. In this algorithm, when the device registered a person's face, only one photo of his face was registered in the device's database. But this image was different from an image captured by an ordinary camera. The answer to this claim is that this device, in addition to a normal camera for taking pictures, also had an infrared camera for detecting depth.
Therefore, when the person's image was recorded, it was not considered a two-dimensional image. In fact, it was considered a three-dimensional plan of a person's face. In the third type, the device had two imaging cameras and a depth detection camera. But the algorithm implemented on the device was a little different. When this algorithm received the person's image, it determined the exact location of the person's eyes, nose and lips and then calculated the distance between these components.
Benefits
The possibility of cheating in this device is zero; It is suitable for all job positions; Instant performance without the need for any human intervention; The lack of hand contact prevents contamination and the spread of any disease
The presence and absence of the palm pattern detection
When the developers of biometric attendance and absence devices turned to the palm pattern, the question arose as to what special feature in the human palm could be unique. There are many features in human hands. A series of palm lines, hand size and palm veins are among the unique characteristics of each person's hand. Palm pattern attendance devices today mostly use palm lines as well as palm veins for authentication.
The infrared sensor inside the device detects the lines or veins of the palm and records the movement of the person. The point that needs to be mentioned is that the palm pattern devices that identify palm lines are not suitable for jobs that mostly involve hands.
Benefits
There is no possibility of cheating in it
