CN105775664A - Belt conveyor speed detecting system based on radio-frequency identification - Google Patents

Abstract

The invention discloses a belt conveyor speed detecting system based on radio-frequency identification. The belt conveyor speed detecting system comprises two or more radio-frequency identifying labels, a belt, two or more readers and a controller; the radio-frequency identifying labels are embedded on the belt; the belt moves along with a drum; the distance between every two readers is fixed; the readers identify the radio-frequency identifying labels, and send signals to the controller; and the controller calculates the operation speed of a belt conveyor according to identified label signals. The belt conveyor speed detecting system has the multiple beneficial effects of: fast label scanning speed; capability of penetrating through dust to read under bad field environments without being interfered by external; incapability of causing such mechanical damage as collision and wear under strong vibration environment; and incapability of influencing the label characteristics and the monitoring accuracy.

Description

A belt conveyor speed detection system based on radio frequency identification

technical field

The invention relates to the field of belt conveyor speed detection, in particular to a belt conveyor speed detection system based on radio frequency identification.

Background technique

In production, it is usually necessary to measure and collect the speed of the belt conveyor as an important parameter and control basis for monitoring the operation of the belt conveyor. The belt conveyor uses a speed sensor to measure the speed. Compared with the set normal speed, if there is a slipping or overspeed fault, the belt conveyor is required to stop running after a delay.

Due to the structural characteristics of the belt conveyor, the installation of testing equipment is affected by structural restrictions, and the on-site operating environment of the belt conveyor is harsh. The speed measurement methods and equipment used are often prone to problems such as large measurement errors, low precision, and easy wear and tear of equipment. How to use suitable equipment or system to accurately and reliably measure the running speed of belt conveyor is a problem that needs to be solved urgently.

Contents of the invention

In order to solve the above problems, the present invention provides a belt conveyor speed detection system based on radio frequency identification, including two or more radio frequency identification tags, belts, two or more readers, and a controller; the radio frequency identification tags are embedded On the belt; the belt moves with the drum; the distance between the two readers is fixed, the reader identifies the radio frequency identification tag and sends a signal to the controller; the controller recognizes the The label signal calculates the running speed of the belt conveyor.

Described controller is PLC controller.

The beneficial effects of the present invention are: the method and system for detecting the speed of a belt conveyor based on radio frequency identification described in the present invention has fast and accurate label scanning speed; it is not subject to external interference; Destruction; can be adjusted according to the actual situation.

Description of drawings

Fig. 1 is the structural representation of the radio frequency identification type belt conveyor speed detection system of the present invention;

Fig. 2 is a signal processing flow chart of a belt conveyor speed detection system based on radio frequency identification according to the present invention.

Among them: 1-radio frequency identification tag; 2-belt; 3-roller; 4-reader; 5-controller.

detailed description

The following will be described in detail in conjunction with the embodiments of the present invention with reference to the accompanying drawings.

A belt conveyor speed detection system based on radio frequency identification, including two or more radio frequency identification tags 1, a belt 2, a roller 3, two or more readers 4, and a controller 5; the radio frequency identification tags 1 are embedded On the belt 2, the position of the radio frequency identification tag 1 relative to the belt 2 is fixed and can be identified by different readers; the belt 2 moves with the drum 3; The distance is fixed, and the reader 4 identifies the RFID tag 1 and sends a signal to the controller 5; the controller 5 calculates the speed of the belt conveyor according to the identified tag signal.

Described controller 5 is PLC controller.

The principle of a belt conveyor speed detection system based on radio frequency identification is the definition of speed, that is, the ratio of distance to time.

The calculation method is that the first RFID tag 1 installed on the belt 2 is scanned by two or more readers 4 determined as the movement of the belt 2; between the first reader 4 and the second reader 4 The distance between the second reader 4 and the third reader 4 is L ₂ , the distance between the nth reader 1 and the n+1th reader ₂ is Ln, each The distance Ln between two readers 4 is fixed.

According to the value of L ₁ combined with the structure of the belt conveyor, the distance S ₁ that the belt 2 runs is constant, and it is recorded that the first radio frequency identification tag 1 is scanned by the first reader 4 and the second reader 4 The interval time T ₁₁ , the running speed V ₁₁ of the belt 2 within the time T ₁₁ is S ₁ /T ₁₁ . Install n radio frequency identification tags 1 on the belt 2, and the second radio frequency identification tag 1 is scanned by the first reader 4 and the second reader 4 at an interval of T ₂₁ , and the belt 2 within T ₂₁ The running speed V ₂₁ is S ₁ /T ₂₁ , the interval time between the nth radio frequency identification tag ₁ being scanned by the first and the second two readers 4 in turn is T _n1 , and the belt 2 The running speed V _n1 is S ₁ /T _n1 .

Through the conversion of the value of L ₂ and the structure of the belt conveyor, the distance S ₂ that the belt 2 runs is constant, and it is recorded that the first radio frequency identification tag 1 is scanned by the second reader 4 and the third reader 4 The interval time T ₁₂ , the running speed V ₁₂ of the belt 2 within the time T ₁₂ is S ₂ /T ₁₂ . Install n radio frequency identification tags 1 on the belt 2, and the second radio frequency identification tag 1 is scanned by the second reader 4 and the third reader 4 in turn at an interval of T ₂₂ , and the belt 2 within T ₂₂ The running speed V ₂₂ is S ₂ /T ₂₂ , the interval time between the nth radio frequency identification tag 1 being scanned by the second and third readers 4 in turn is T _n2 , and the belt ₂ The running speed V _n2 is S ₂ /T _n2 .

According to the value of L _n combined with the structure of the belt conveyor, the running distance S _n of the belt 2 is constant. Record the first radio frequency identification tag 1 passing through the nth reader 4 and the n+1th reader 4. The scanned interval time T _1n , the running speed V _1n of the belt 2 within the time T _1n is S _n /T _1n . Install n radio frequency identification tags 1 on the belt 2, and the second radio frequency identification tag 1 is scanned by the nth reader 4 and the n+1th reader 4 in turn at an interval of T _2n , within T _2n time The running speed V _2n of the belt 2 is S ₁ /T ₂₁ , the interval time between the nth radio frequency identification tag 1 being scanned by the first and the second two readers 4 in turn is T _nn , within the time T _nn The running speed V _nn of the belt 2 is S _n /T _nn .

Combined with radio frequency identification and high-speed signal acquisition and processing technology, the continuously collected T is used for program calculation, and multiple V _nn values are obtained for comparison, filtering, processing and analysis, and then the running speed V _t of the belt conveyor can be obtained. The more radio frequency identification tags 1 and readers 4 installed on the belt conveyor belt 2, the higher the accuracy of V _t obtained by the controller 5 is.

The radio frequency identification tag 1 is embedded in the belt 2, and each radio frequency identification tag 1 can be accurately distinguished, so that the speed of the belt conveyor can be accurately measured, and the influence of environmental factors on the measurement accuracy can be effectively prevented.

The distance between the readers 4 is fixed, each radio frequency identification tag 1 is scanned by two readers 4 that are determined as the belt 2 moves, the distance that the belt 2 runs is certain, and the scanning speed of the radio frequency identification tag 1 is fast and accurate ; Radio frequency identification tag 1 non-contact identification, the sensitivity and measurement accuracy of radio frequency identification are better than ordinary sensors, can penetrate dust, read in the harsh environment of the site, and will not be interfered by the outside world; Advanced fixing and protection methods will not cause mechanical damage such as bruises and abrasions in strong vibration environments, and will not affect the characteristics of the RFID tag 1 itself and the accuracy of monitoring; the length and measurement of the belt conveyor Depending on the requirements, install different numbers of RFID tags 1 and readers 4 to achieve on-demand customization, and adjust the algorithm according to the actual situation; when a RFID tag 1 is damaged or missed reading, because multiple RFID tags 1 are installed , without affecting the speed measurement at all.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also It should be regarded as the protection scope of the present invention.

Claims (2)

1. based on a ribbon conveyer speed detection system for RF identification, including two and above RFID tag (1), belt (2), cylinder (3), two and above reader (4), controller (5)；Described RFID tag (1) is embedded on belt (2), and RFID tag (1) is fixing relative to the position of belt (2), it is possible to by different reader identification；Described belt (2) moves along with cylinder (3)；The described distance between each two reader (4) is fixing, and RFID tag (1) is identified by described reader (4), and transmits a signal to controller (5)；Controller (5) calculates the speed of ribbon conveyer according to the label signal recognized.

2. RF identification formula ribbon conveyer speed detection system according to claim 1, it is characterised in that described controller (5) is PLC.