WO2017020603A1

WO2017020603A1 - Signal processor for shape meter of cold-rolled strip

Info

Publication number: WO2017020603A1
Application number: PCT/CN2016/078563
Authority: WO
Inventors: 刘宏民; 于丙强; 杨利坡; 陈素文; 于华鑫; 丁栋
Original assignee: 燕山大学
Priority date: 2015-07-31
Filing date: 2016-04-06
Publication date: 2017-02-09
Also published as: CN105005287A; CN105005287B

Abstract

A signal processor for a shape meter of cold-rolled strip, comprising a rotary head (1) and a cover (2), wherein an excitation power source board (3), an analogue acquisition board (4), a data processing board (5) and a wireless sending board (6) are mounted inside the rotary head (1); an electric connector (7) is mounted at one end of the rotary head (1), and an inner magnetic ring (8) is sheathed on the other end; the rotary head (1) is nested inside the cover (2); a wireless receiving board (10), a voltage regulation circuit board (11) and an outer magnetic ring (12) are mounted on an inner wall of the cover (2); a junction box (13) is mounted on an outer wall of the cover (2), and a communication cable (15) and a high-frequency power supply cable (14) are introduced from the junction box (13); and the high-frequency power supply cable (14) is connected to the voltage regulation circuit board (11) and the outer magnetic ring (12) via the junction box (13), the voltage regulation circuit board (11) supplies power to the wireless receiving board (10), the outer magnetic ring (12) supplies power to the inner magnetic ring (8), the inner magnetic ring (8) is connected to and supplies power to the excitation power source board (3), an excitation signal is forwarded to a detection roller (18) via the electric connector (7) for providing a stimulation signal to a sensor, and power supply voltages with different amplitudes supply electric energy to each of the boards (3, 4, 5, 6) of the rotary head (1). The signal processor is simple for maintenance and has high reliability, good anti-interference performance and long service life.

Description

Signal processor for cold rolled strip shape meter

This application claims the priority of the Chinese Patent Application filed on July 31, 2015, the Chinese Patent Application No. CN201510460465.X, entitled "A Signal Processor for Cold Rolled Strip Shaper", The entire contents of this application are incorporated herein by reference.

Technical field

The invention relates to the field of automatic detection and control, in particular to a wireless transmission and data processing device suitable for shape detection signals of cold rolled strip rolling processes such as cold rolled steel strip, aluminum strip and copper strip.

Background technique

At present, the on-line detection of cold rolled strip is the high-end detection technology of the rolling process, which is the premise of realizing the closed-loop control of the plate shape, and is the core key technology for producing high-quality strip. In the shape detection system, the acquisition and communication of the original shape signal and data processing are two important components. The on-line detection of the cold rolled strip in the prior art has the following problems: (1) The conventional plate-shaped signal processing method is to first output the analog signal generated by the sensor mounted inside the plate-shaped detecting roller to the carbon brush slip ring device through the carbon brush slip ring device. Outside the detection roller, signal shape processing is performed. The signal output adopts the analog signal output mode. When transmitting the analog signal remotely in the industrial field, it will inevitably be interfered by external factors such as electromagnetic, vibration and humidity, which will affect the measurement accuracy of the strip shape. And the carbon brush slip ring type signal transmission mode is affected by the friction heat generation, wear dust and vibration between the carbon brush and the slip ring. When the wear dust accumulates more and cannot be cleaned up in time, the adjacent channel may A short circuit occurs, causing severe signal distortion. Therefore, such a signal output device has a complicated structure and requires spray cleaning or humid air purging, which is difficult to maintain and has a short life. (2) Using external digital acquisition card for digital signal acquisition, remote signal output, poor shielding performance, can not avoid electromagnetic interference, electromagnetic, photoelectric, temperature, humidity and vibration interference in the industrial field, and the structure is complex and large. (3) The plate-shaped detecting roller rotates at a high speed during operation, and the sensor on the detecting roller is supplied The electric power needs a high frequency excitation signal of a specific frequency, and is powered by a contact carbon brush slip ring, which is susceptible to friction, wear and vibration between the carbon brush slip rings, causing interference and poor stability and reliability. (4) The plate-shaped signal transmission device, the signal processing device and the contact sliding power supply device are arranged in a distributed manner, and the structure is complicated and maintenance is difficult.

As the user's requirements for the shape quality of cold-rolled strips continue to increase and the pace of technological advancement of steel companies accelerates, higher requirements are imposed on the cold-rolled strip shape measurement and control technology. To improve the level of shape measurement and control technology, it is first necessary to improve the level of shape detection. The invention discloses a high-precision, long-life plate-shaped signal digital processing and transmission device, which is a key technology for improving the level of shape detection. The prior art cannot meet the industrial needs.

Summary of the invention

In view of the above, an object of the present invention is to provide a signal processor for a cold rolled strip shape meter that is simple in maintenance, high in reliability, undisturbed, and stable in power supply.

In order to achieve the above object, the following technical solutions are adopted: the invention mainly comprises a rotating head and a cover,

The rotating head is a cylindrical shaft structure, and an excitation power board, an analog collecting board, a digital processing board and a wireless transmitting board are installed inside the rotating head, and the center is installed at the center of one end of the rotating head a protruding electrical connector, the inner magnetic ring is sleeved on the outer wall of the other side of the rotating head;

The main body of the outer cover is a cylindrical structure, and the open end edge is provided with a ring with a threaded hole, and the outer cover is internally nested with a rotary head; a wireless receiving board is installed in the inner wall of the outer cover and stabilized a pressure circuit board, wherein an outer magnetic ring is fixedly mounted on the inner wall of the outer cover corresponding to the inner magnetic ring of the rotary head, the outer magnetic ring and the inner magnetic ring on the rotary head are matched with each other; and the junction box is mounted on the outer wall of the outer cover Introducing a communication cable and a high frequency power supply cable in the junction box;

The electrical connector is configured to connect with a sensor inside the plate-shaped detecting roller and collect a shape signal of the sensor; the excitation power card is connected to the electrical connector, and the electrical connector is used in the shape detecting roller The sensor provides an excitation signal; the electrical connector is connected to the analog acquisition board for signal transmission, and the detection signal is processed by the analog acquisition board, the digital processing board, and then transmitted to the wireless transmission board. , the wireless transmitting board will detect the letter The number is transmitted to the wireless receiving board in the housing, and the wireless receiving board outputs a detection signal through a communication cable.

Further, one end of the high frequency power supply cable is used for connecting with an output connector of the main box, the main box generates a high frequency excitation signal for realizing electromagnetic induction coupling; and the other end of the high frequency power supply cable Connected to the voltage stabilizing circuit board and the outer magnetic ring through a junction box, the voltage stabilizing circuit board is connected to and powered by the wireless receiving board, and the outer magnetic ring is coupled by wireless electromagnetic induction. The inner magnetic ring transmits electrical energy; the inner magnetic ring is connected to and powered by the excitation power supply card, and the excitation power supply card generates an excitation signal and a supply voltage of different amplitudes, and the excitation power supply card is The analog acquisition board, the digital processing board, and the wireless transmission board are sequentially connected and power the boards.

Further, a finger is provided at one end of the rotary head to which the electrical connector is mounted.

Further, a finger groove is formed on an end surface of the plate-shaped detecting roller, and the finger groove corresponds to a size and a position of the finger, and the rotating head is inserted into the plate-shaped detecting roller through the finger .

Further, an open end of the outer cover is connected to a bearing seat of the plate-shaped detecting roller, and the outer cover is fixed to a bearing seat of the plate-shaped detecting roller by a screw and a connecting plate; a rotating head inside the outer cover It is connected to the plate-shaped detecting roller.

Further, the wireless receiving board is sequentially connected to an external switch, a computer, a communication box, and a shape control system through a communication cable, and outputs a signal.

Further, an observation window is provided at the center of the sealing end of the outer cover.

Further, an air-cooled joint is mounted on the outer wall of the outer casing.

Further, a status display card is placed on the outermost end surface of the outer cover, and a voltage signal generated by the excitation power supply card supplies power to the status display card, and the status display card and the wireless receiving board Connected for displaying the detection signal output by the wireless receiving board.

Compared with the prior art, the present invention has the following advantages:

1. By installing the excitation power board, analog acquisition board, digital processing board and wireless transmission board in the rotating head, the analog processing of the shape signal, digital processing, and no The functions of line digital transmission and wireless power supply are highly integrated to realize miniaturization, integration and networking of hardware systems.

2. The shape detection signal is processed by the analog acquisition board and the digital processing board and transmitted to the wireless transmission board to realize the signal processing of the shape signal during the rotation of the detection roller to avoid electromagnetic, photoelectric, temperature, humidity and vibration. External interference improves the accuracy of signal detection and processing.

3. The digital processing board performs analog-to-digital (AD) conversion, phase-frequency identification, magnetic coupling isolation, optical isolation and digital encoding, and then passes to the wireless transmission board; wireless output in the form of digital signals, avoiding traditional carbon brushes The effects of slip ring friction, wear and vibration improve transmission accuracy and service life.

4. The non-contact transmission of large power excitation power supply signal is realized by the principle of electromagnetic coupling. The combined magnetic ring type wireless power supply module can effectively avoid the influence of friction, wear and vibration between the traditional contact sliding power supply elements, and improve the stability of power supply. And reliability.

DRAWINGS

FIG. 1 is a schematic diagram of a three-dimensional structure of an embodiment of the present invention.

Figure 2 is a cross-sectional structural view of an embodiment of the present invention.

FIG. 3 is a block diagram of a workflow according to an embodiment of the present invention.

4 is a system connection diagram in a panel shape detecting system according to an embodiment of the present invention.

FIG. 5 is a block diagram of a power supply system according to an embodiment of the present invention.

Reference numerals: 1-rotating head, 2-cover, 3-excitation power board, 4-analog acquisition board, 5-digit processing board, 6-wireless transmitting board, 7-electric connector, 8-in Magnetic ring, 9-connector, 10-wire receiver board, 11-regulator board, 12-external magnetic ring, 13-junction box, 14-high frequency power supply cable, 15-communication cable, 16-state Display board, 17-key, 18-detection roller, 19-bearing, 20-switch, 21-computer, 22-communication box, 23-board control system, 24-view window, 25-air-cooled joint, 26-wireless signal processor, 27-host box, 28-output connector, 29-power input.

detailed description

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the description of the specific structures in this section and the description of the embodiments are merely illustrative of specific embodiments and should not be construed as limiting the scope of the invention.

The present invention will be further described below in conjunction with the accompanying drawings:

As shown in FIG. 1 and FIG. 2, the present invention mainly comprises a rotary head 1 and a cover 2, wherein the rotary head is a cylindrical shaft structure, and an excitation power board (LC-AL) 3 and an analog acquisition board are installed inside the rotary head. Card (MN-16AM) 4, digital processing board (SZ-DSP) 5 and wireless transmitting board (WF-TX) 6, and an outwardly protruding electrical connector 7 is mounted at the center of one end of the rotating head, the electric The connector uses a circular or square aerospace connector, the inner magnetic ring 8 is sleeved on the other side of the rotating head;

The main body of the outer cover 2 has a cylindrical structure, and the open end edge is provided with a ring of connecting holes 9 with threaded holes, and the rotating cover is nested inside the outer cover; a wireless receiving board (WF-RX) is installed in the inner wall of the outer cover. 10 and the voltage stabilizing circuit board (WY-WR) 11, fixedly mounting the outer magnetic ring 12 at the inner wall of the outer cover corresponding to the inner magnetic ring of the rotating head, the outer magnetic ring and the inner magnetic ring on the rotating head are matched with each other, the inner magnetic ring Combined with the outer magnetic ring to form a combined magnetic ring type wireless electromagnetic induction power supply, the inner and outer magnetic rings are finished by high-temperature sintering of nickel-zinc ferrite, and the transmission efficiency is 75%-85%; the junction box 13 is installed on the outer wall of the outer cover, a communication cable 15 and a high frequency power supply cable 14 are led out from the junction box;

As shown in FIG. 4 and FIG. 5, one end of the high frequency power supply cable is connected to the output connector 28 of the main box 27. The power input 29 of the main box is 110-220V, 50/60 Hz AC power, and the output is used for A high-frequency excitation signal for electromagnetic induction coupling is realized; the other end of the high-frequency power supply cable is respectively connected to the voltage-stabilizing circuit board and the outer magnetic ring through a junction box, and the voltage-stabilizing circuit board is connected to and supplied with the wireless receiving board, and the external magnetic field The ring transmits electric energy to the inner magnetic ring through wireless electromagnetic induction coupling, and the rotating inner magnetic ring receives the high-frequency alternating current signal transmitted by the outer magnetic ring through wireless electromagnetic induction; the inner magnetic ring is connected with the excitation power board and supplies power thereto. Excitation power board generates excitation signal and voltage signal of different amplitude, excitation power board and analog acquisition board, number The word processing board and the wireless transmitting board are connected in sequence, and the voltage signals of different amplitudes generated by the excitation power board provide the required power supply voltage for various circuit boards on the rotating head.

The electrical connector is connected to the detecting roller, the detecting roller is mounted with a sensor, the sensor acquires the shape information, the electrical connector is connected with the sensor inside the detecting roller, the sensor transmits the detection signal to the electrical connector; the excitation power card is also Connected to the electrical connector, the excitation signal is provided to the sensor in the detection roller through the electrical connector to make the sensor work normally; the electrical connector is connected to the analog acquisition board for signal transmission, and the detection signal is transmitted through the analog acquisition board and the digital processing board. After the card is processed, it is transmitted to the wireless transmission board, and the wireless transmission board transmits the detection signal to the wireless receiving board in the housing. The wireless receiving board outputs the detection signal over a long distance through the communication cable. A state display board 16 is placed on the outermost end surface of the outer cover, and there are power status indicators such as power supply, work, communication, etc., and the voltage signal generated by the excitation power board is supplied with power, and is connected with the wireless receiving board, and outputs the same. The detection signal is displayed.

A finger 17 is disposed at one end of the rotating head on which the electrical connector is mounted, and a finger groove is formed on the end surface of the detecting roller 18. The finger groove corresponds to the size and position of the finger on the rotating head, and the rotating head passes the finger and The plate-shaped detection roller is plug-in connection for synchronous rotation.

The open end of the outer cover is connected to the bearing seat 19 of the plate-shaped detecting roller, and the outer cover is fixed to the bearing seat of the plate-shaped detecting roller by a screw and a connecting plate; the rotating head inside the outer cover is connected with the plate-shaped detecting roller.

The wireless receiving board is sequentially connected to the external switch 20, the computer 21, the communication box 22, and the shape control system 23 through a communication cable, and outputs a signal.

A transparent material observation window 24 is disposed at the center of the sealing end of the outer cover. The blinking state of the indicator light on the turntable display card 16 can be observed through the observation window, and it can be determined whether the system is in a normal working state.

An air-cooled joint 25 is mounted on the outer wall of the outer casing. Since the heat generated by the work of the card and the heat generated by the rolled strip are transferred to the signal processor, if the temperature of the signal processor is too high, it can be cooled by compressed air.

The working process is roughly as follows:

In the working process, the high-frequency excitation signal is first generated by the main box, and the high-frequency power supply cable and the junction box are respectively connected to the voltage-stabilizing circuit board and the outer magnetic ring on the outer cover, and the voltage-stabilizing circuit board is wirelessly received. The power supply of the board, the inner magnetic ring and the outer magnetic ring together form a combined magnetic ring type wireless power supply device, and the outer magnetic ring realizes the high frequency electric signal to the inner magnetic ring by means of wireless electromagnetic induction coupling, and the inner magnetic ring is connected to the excitation power supply board. The card and the excitation power board generate voltage signals and excitation signals of various amplitudes. The voltage signals of different amplitudes provide the required power supply voltage for various circuit boards on the rotating head, and the excitation signals are detected by the electrical connector. The sensor on the roller provides an excitation signal to make the sensor in a normal working state, and the shape detection signal is obtained through the sensor. The shape detection signal is processed by the analog acquisition board and the digital processing board, and then transmitted to the wireless transmission board, and the wireless transmission board is transmitted. The detection signal is transmitted to the wireless receiving board in the housing, and the wireless receiving board outputs the detection signal through the communication cable.

As shown in Figure 3, the analog signal generated by the sensor on the plate-shaped detecting roller is transmitted to the analog acquisition board through the electrical connector, and the analog acquisition board demodulates, locks, and filters the analog shape signal, and then transmits it to the digital Processing the board; the digital processing board performs analog-to-digital (AD) conversion, phase-frequency phase-detection, magnetic coupling isolation, optical isolation, and digital encoding, and continues to pass to the wireless transmission board; the wireless transmission board sets the shape data to specific The transmission protocol is wirelessly transmitted to the wireless receiving board; the wireless receiving board converts the received wireless signal data packet into a wired signal data packet, and transmits it to the industrial control computer for subsequent unpacking through the junction box and the shielded communication cable. Operation, signal processing, real-time display and process control.

As shown in FIG. 4, in the shape detecting system, the wireless signal processor 26 of the present invention is usually mounted on one side of the plate-shaped detecting roller, and the main box is supplied with a high-frequency excitation signal through a high-frequency power supply cable. The wireless signal processor of the device digitally processes and encodes the analog signal of the shape detecting roller, sends it to the panel display computer through the switch, and then transmits the signal to the shape control system through the communication box.

The embodiments described above are only intended to describe the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Variations and modifications are intended to fall within the scope of the invention as defined by the appended claims.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are included in the spirit and scope of the present invention, should be included in the present invention. Within the scope of protection.

Industrial applicability

The signal processor for cold rolled strip shape meter provided by the invention can integrate the functions of analog processing, digital processing, wireless digital transmission and wireless power supply of the plate shape signal, and realize miniaturization of the hardware system. Integrated and networked. Therefore, the present invention has industrial applicability.

Claims

A signal processor for a cold rolled strip shape meter, comprising mainly a rotary head and a cover, characterized in that:

The rotating head is a cylindrical shaft structure, and an excitation power board, an analog collecting board, a digital processing board and a wireless transmitting board are installed inside the rotating head, and the center is installed at the center of one end of the rotating head a protruding electrical connector, the inner magnetic ring is sleeved on the outer wall of the other side of the rotating head;

The main body of the outer cover is a cylindrical structure, and the open end edge is provided with a ring with a threaded hole, and the outer cover is internally nested with a rotary head; a wireless receiving board is installed in the inner wall of the outer cover and stabilized a pressure circuit board, wherein an outer magnetic ring is fixedly mounted on the inner wall of the outer cover corresponding to the inner magnetic ring of the rotary head, the outer magnetic ring and the inner magnetic ring on the rotary head are matched with each other; and the junction box is mounted on the outer wall of the outer cover Introducing a communication cable and a high frequency power supply cable in the junction box;

The electrical connector is configured to connect with a sensor inside the plate-shaped detecting roller and collect a shape signal of the sensor; the excitation power card is connected to the electrical connector, and the electrical connector is used in the shape detecting roller The sensor provides an excitation signal; the electrical connector is connected to the analog acquisition board for signal transmission, and the detection signal is processed by the analog acquisition board, the digital processing board, and then transmitted to the wireless transmission board. The wireless transmitting board transmits a detection signal to the wireless receiving board in the housing, and the wireless receiving board outputs a detection signal through a communication cable.
A signal processor for a cold rolled strip shape meter according to claim 1, wherein one end of said high frequency power supply cable is used for connecting with an output connector of said main box. The main box generates a high frequency excitation signal for realizing electromagnetic induction coupling; the other end of the high frequency power supply cable is respectively connected to the voltage stabilization circuit board and the outer magnetic ring through a junction box, the voltage stabilization circuit board and The wireless receiving board is connected to and powered by the outer magnetic ring, and the inner magnetic ring transmits electrical energy to the inner magnetic ring by means of wireless electromagnetic induction coupling; the inner magnetic ring is connected to the excitation power board and supplies power thereto. The excitation power board generates an excitation signal and a supply voltage of different amplitudes, and the excitation power board is sequentially connected to the analog acquisition board, the digital processing board, and the wireless transmission board The board is powered.
A signal processor for a cold rolled strip shaper according to claim 1, wherein a finger is provided at one end of the rotary head to which the electrical connector is mounted.
A signal processor for a cold-rolled strip shaper according to claim 3, wherein a finger groove is formed on an end surface of said plate-shaped detecting roller, said finger groove and said finger Corresponding to the size and position, the rotary head is inserted into the plate-shaped detecting roller by the finger.
A signal processor for a cold rolled strip shaper according to claim 1, wherein an open end of said outer cover is connected to a bearing block of said plate-shaped detecting roller, and a screw and a connecting plate are provided. The outer cover is fixed to a bearing housing of the plate-shaped detecting roller; a rotary head inside the outer cover is coupled to the plate-shaped detecting roller.
A signal processor for a cold rolled strip shape meter according to claim 1, wherein said wireless receiving board is connected to an external switch, computer, communication box, and form control through a communication cable. The system is connected in turn to output the signal.
A signal processor for a cold rolled strip shaper according to claim 1, wherein a viewing window is provided at the center of the sealing end of said outer cover.
A signal processor for a cold rolled strip shaper according to claim 1 wherein an air-cooled joint is mounted on the outer wall of said outer casing.
A signal processor for a cold rolled strip shaper according to claim 1, wherein a state display card is placed on an outermost end surface of said outer cover, which is generated by said excitation power supply card The voltage signal is used to supply power to the status display board, and the status display board is connected to the wireless receiving board for displaying a detection signal output by the wireless receiving board.