KR200425810Y1 - Fabric density measuring device - Google Patents

Abstract

The present invention relates to a density measuring device having a wireless data transmission function, and to a density measuring device mounted on the rear of the wood cutter straightener tenter to improve user convenience.

Density Gauge, Milling Calibrator

Description

A density measuring apparatus for textiles

Figure 1 schematically shows the overall configuration of the fabric density measuring device 10 of the present invention,

2 is a schematic view for explaining the internal structure of the density detector 30,

3 is a program flow chart,

4 shows a wireless data transmission configuration diagram.

The present invention relates to a density measuring device having a wireless data transmission function, and more particularly, to a density measuring device installed at the rear of a woodworking cutter tenter to improve user convenience.

Fabric density is one of the most important factors to determine the quality of the fabric, but there is no equipment to measure the density automatically automatically, so the workers manually check the density. In order to check the density, the operator has to move away from the fabric input area with the operation panel of the machine and go to the fabric discharge port. In some cases, it can take a lot of time to measure density due to manual work, and because the operator has to check the density and pay attention to other processes, the density can't be checked frequently, so the density of the fabric can't be carefully managed. There was a difficulty.

On the other hand, the fabric is processed through the wood-calibration tenter to adjust the density of the fabric by adjusting the overfeed value of the tenter. Therefore, since the density of the fabric may be changed while going through the tenter, the fabric density meter for measuring the density of the fabric discharged from the tenter and finally displaying it usefully to the user is urgently required.

The present invention has been devised to solve the above problems and requirements, and is installed in the distal end of the tenter to wirelessly measure the density of the fabric and transmit the related data wirelessly to a remote display device. It relates to a density measuring apparatus having a.

Accordingly, an object of the present invention is to provide a fabric density measuring apparatus for automatically measuring fabric density, and another object is to provide a density measuring apparatus having a wireless data transmission function to improve user convenience by providing a wireless transmission function. It is.

An object of the present invention is an encoder 50 for checking the distal speed discharged from the tenter rear outlet; Lamp 40 for shining light in the vertical direction of the fabric; A density detector (30) for controlling the ramp and checking a far-end speed from the encoder to calculate a density value; A main body portion 11 composed of a wireless data transmitter 20 for receiving a density value from the density detector and wirelessly transmitting the density value to a display device; It can be achieved by the fabric density measuring apparatus 10 configured to include.

Figure 1 schematically shows the overall configuration of the original fabric density measuring apparatus 10 of the present invention, Figure 2 is a schematic diagram for explaining the internal configuration of the density detector (30). The fabric density detector will be described in detail with reference to FIGS. 1 and 2. The density detector 30 converts the light emitted from the lamp 40 and transmitted through the far end 41 into an electrical signal, and outputs the light detector 31 and the analog signal output from the light detector 31 as a digital signal. In other words, the control unit 32 selects only a signal corresponding to the far-end density to obtain a density value. The far-end density value output from the control unit 32 is transmitted to the wireless data transmitter 20 through RS-483 communication. The lamp 40 disposed at the front end of the photodetector may use a halogen lamp. Preferably, the lamp 40 is semi-permanent and a low voltage LED lamp may be used. -500-3-1-24 encoder is used, and it can send 500 pulses in one rotation.

The photodetector 31 is further composed of a lens 33 for collecting light transmitted through the fabric and a sensor 34 for converting the light collected through the lens into an electrical signal. The sensor 34 is composed of a plurality of optical sensors having various angles, preferably 13 optical sensors. Therefore, 13 electrical signals are output according to the angle of the far end. Since the electrical signals are mixed with disturbance light and noise components, and the signal strength is weak, it is possible to filter out the intrinsic signal by removing the noise through the electric filter and the amplification circuit.

The basic function of the sensor 34 is to convert a signal of light, which is a physical signal, into an electrical signal. Since the far end has various angles, the signal must be read from a sensor having the same angle as the far end in order to obtain an accurate far end density. Therefore, the sensor is preferably composed of 13 optical sensors, each sensor can be designed to detect up to +13.5 degrees and -13.5 degrees around the sensor corresponding to 0 degrees in the center.

The control unit 32 receiving the 13 processing signals output from the photodetector 31 may be operated as follows to obtain a far-end density. The signal is input to the microprocessor embedded in the controller via the analog multiplexer of the controller. The processor operates the multiplexer to digitize each signal internally. The digitized signal contains noise components, not density signals. Therefore, the internal program can determine which is the density signal and which is the noise signal through a special algorithm and analyze the density signal to obtain the density of the far end. The microprocessor may transmit information to the wireless data transmitter 20, which will be described later, via RS-485 communication, and ultimately, transmit the obtained density signal to the display device 12.

The microprocessor of the controller 32 obtains the density of the far-end through verification and processing of the density signal. Preferably, the embedded processor is a high performance microprocessor capable of 160,000 operations per second. Hereinafter, a program executed by the control unit 32 will be described.

The program is stored in flash memory inside the microprocessor. 3 briefly illustrates the role of a program, and can be roughly divided into two roles. First, it is connected to the wireless data transmitter and RS-485 communication, transmits the density signal and receives the speed value of the far-end through the encoder 50, and then receives the 13 density signals sequentially by digitizing and controlling the multiplexer The algorithm performs the density of the fabric.

3 is a program flow chart for obtaining far-end density. According to this, the signals of each of the 13 sensors are read and digitized. The size of the signal is checked to store the channel having the largest magnitude. Thereafter, the far-end speed is checked, which analyzes a signal input from the encoder 50 to check the speed. The lamp 40 is then appropriately adjusted based on the magnitude of the signal. Even if the lamp is turned on with the same brightness, if the far end 41 is thick, the size of the signal is small. If the far end is thin, the signal is large. To check the density, an appropriate level of signal size must be ensured, so the lamp is automatically adjusted each time to match the required signal size. This is the preparation process for checking the density, after which the density pulse is read through the channel memorized in the previous step. This density pulse is read and processed to read the density of the far end.

4 is a schematic block diagram of wireless data transmission. Specifically, the wireless data transmission device (FD-RF) 20 transmits a density / speed / level signal from the density detector 30 to RS-485 communication. It receives the input, and processes the signal to radiate to the air through the antenna as an RF radio signal, and comprises a transmission module 21 and a transmission device microprocessor (22). In one embodiment, the transmission module used TX2-433-40-5V of Radiometrix of England having the following characteristics.

* 2 stage SAW controlled, FM modulated, up to 160kbps transmission speed.

* Can operate at 2.2V to 6V power supply voltage.

* Delivers + 9dBm transmit power at 433.92MHz.

* It emits RF signal with high efficiency of more than 15%.

* Improved frequency accuracy and deviation accuracy.

Processes second-order resonant signals below 60 dBc.

On the other hand, the RF receiving module 70 corresponding to the transmitting module 21 also used RX2-433-40-5V of Radiometrix Co., Ltd. having the following characteristics.

Double conversion FM was used.

* SAW filter with 50dB of gain on the front and rear.

* Available at 3.0V to 6.0V supply voltage and consumes 13mA of current

-100dBm sensitivity (at 1ppm BER in 40kbps version)

For the convenience of the user, the display device 12 which can be remotely mounted from the main body 11 receives an RF signal through an antenna and separates the data signal from the RF receiving module 70, and processes the data signal to obtain a density signal for display. CPU unit 60 for controlling the device and the display unit 80 under actual control of the CPU unit to display the number. The preferred CPU is Microchip's 16F876A, which has the capacity to execute 5 million instructions per second.

A fabric density meter having the above configuration was attached to an experimental machine. When the fabric flows, the fabric density meter measures the density and emits an RF signal to the air through the transmitter antenna. The RF receiving module of the display device receives the signal and displays the correct density value on the display device installed in front of the user, thereby improving work efficiency and stability.

Claims (4)

An encoder 50 for checking the distal speed; Lamp 40 for shining light in the vertical direction of the fabric; A density detector (30) for controlling the ramp and checking a far-end speed from the encoder to calculate a density value; A main body portion 11 composed of a wireless data transmitter 20 for receiving the density value from the density detector and wirelessly transmitting the density value to the display device, and a display device 12 for displaying the density value wirelessly received from the wireless data transmitter. Fabric density measuring device configured to include). The light detector 31 of claim 1, wherein the density detector 30 converts the light emitted from the lamp 40 and transmitted through the distal end 41 into an electrical signal, and outputs the electrical signal from the light detector 31. The far-end density measuring apparatus, characterized in that the control unit 32 for converting the output analog signal into a digital signal to select only the signal corresponding to the far-end density to obtain a density value. The apparatus of claim 1, wherein the wireless data transmitter (20) comprises a transmitter module (21) and a transmitter microprocessor (22). The display device of claim 1, wherein the display device 12 includes an RF receiving module 70 that receives an RF signal and separates the data signal, a CPU unit 60 that processes the data signal to obtain a density signal, and controls the display device. Disposed by the CPU control unit, characterized in that consisting of a display unit for displaying the actual number, characterized in that the fabric density measuring device.

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