JP2000172976A - Signal transmission equipment - Google Patents

Abstract

(57) Abstract: A desired signal can be transmitted from a plurality of measurement results measured by an optical measuring device provided on a rotating disk while shortening the longitudinal dimension of the rotating transformer. A signal transmission device is provided. SOLUTION: A rotary transformer 3 transmits a measurement result of a wire W measured by an optical measuring device A provided on a rotating disk 4 and having a plurality of CCD image sensors 21 having a required number of light receiving elements. Each of the CCs is operated by an arithmetic processing unit 10 provided on the rotating disk 4.
The position data of the wire W is calculated based on the output from the D image sensor 21, each position data of the wire W is converted into a digital signal, and a carrier signal is superimposed on each digital signal to generate an AC signal. The alternating signals are combined in a predetermined arrangement and sent to the rotary transformer 3 as a series of transmission signals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a signal transmission device. More specifically, the present invention relates to an improvement in a signal transmission device when a rotary transformer is used.

[0002]

2. Description of the Related Art Conventionally, in precision rolling of a wire represented by a steel wire, a cross-sectional shape of the wire is measured by an optical dimension measuring device in order to obtain parameters for dimensional control and rolling control. As shown in FIG. 8 and FIG.
A measurement comprising an optical system in which a light source d and a CCD image sensor e are arranged on the rotating disk b so as to sandwich a wire W inserted through a through hole c provided at the center of the rotating disk b. An optical measuring device a having a section is known. The result of the measurement by the optical measuring device a is transmitted to a data processing device (not shown) by a rotary transformer t disposed behind the rotary disk b. In the figure, the symbol f indicates the output of the CCD image sensor e by the rotating transformer t.
1 shows a signal processing device for superimposing a carrier signal to be transmitted according to the present invention.

However, in this optical measuring device a, in order to transmit a measurement result (see FIG. 9) in two directions of an X-axis direction and a Y-axis direction orthogonal thereto, a synchronization signal and an alarm signal, A rotary transformer t having four channels is used as the rotary transformer t. Then, in the rotary transformer t, as shown in FIG. 8, since the first channel t ₁ ~ fourth channel t ₄ are tandem arranged in the longitudinal direction of the wire is W, the lengthening of the rotary transformer t Is calling. For this reason, there is also a problem that the optical measuring device a cannot be installed on a line where the distance between the rolling mills is small.

[0004] The use of a rotary transformer t having four channels for transmitting a signal requires one channel for one signal since each data is transmitted without encoding. It is.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art, and is intended to convert a plurality of measurement results measured by an optical measuring device provided on a rotating disk into a rotating transformer. While shortening the longitudinal dimension of
It is an object of the present invention to provide a signal transmission device capable of performing desired signal transmission.

[0006]

According to a first aspect of the present invention, there is provided a signal transmission device which is measured by an optical measuring device provided on a rotating disk and having a light receiving element array having a required number of light receiving elements. A signal transmission device for transmitting a measurement result of the wire rod by a rotary transformer, wherein the wire rod position calculation unit calculates a position of the wire rod based on an output from the light receiving element array, and converts the calculated wire rod position into a digital signal. The rotary disk includes an arithmetic processing device having a digital signal generation unit and an AC signal generation unit that generates an AC signal by superimposing a carrier signal on the digital signal generated by the digital signal generation unit. It is characterized by becoming.

A second embodiment of the signal transmission device of the present invention is a device for transmitting a measurement result of a wire rod measured by an optical measuring device provided on a rotating disk and having a light receiving element array having a required number of light receiving elements. A signal transmission device for transmitting by a rotary transformer, wherein a wire rod position calculating unit that calculates a position of the wire rod based on an output from the light receiving element row, and a wire diameter of the wire rod based on the position of the wire rod calculated by the front wire rod position calculating unit. , A digital signal generator that converts the calculated wire position and wire diameter into digital signals, and superimposes a carrier signal on each digital signal generated by the digital signal generator, and An AC signal generating unit for generating a converted signal, and a transmission signal generating unit for generating a series of transmission signals by combining the signals converted by the AC signal generating unit in a predetermined arrangement. The arithmetic processing device characterized by comprising comprises the rotating disk.

According to a third aspect of the signal transmission device of the present invention, a measurement result of a wire rod measured by an optical measuring device disposed on a rotating disk and provided with a plurality of light receiving element rows having a required number of light receiving elements. Signal transmission device for transmitting the position of the wire rod by a rotary transformer, a wire rod position calculation unit that calculates the position of the wire rod respectively by the output from the plurality of light receiving element rows, and a digital that converts each of the calculated wire rod position into a digital signal A signal generator, an AC signal generator for superimposing a carrier signal on each digital signal generated by the digital signal generator to generate an AC signal, and an AC signal generated by the AC signal generator. And a transmission signal generating unit for generating a series of transmission signals by combining the respective signals in a predetermined arrangement.

According to a fourth aspect of the signal transmission device of the present invention, a measurement result of a wire rod measured by an optical measuring device provided on a rotating disk and provided with a plurality of light receiving element rows having a required number of light receiving elements. A signal transmission device for transmitting a signal by a rotary transformer, a wire rod position calculation unit that calculates the position of the wire rod by the output from the plurality of light receiving element rows, and from the position of the wire rod calculated by the front wire rod position calculation unit A wire diameter calculation unit that calculates the wire diameter of the wire, a digital signal generation unit that converts the calculated wire position and wire diameter into a digital signal, and a carrier signal to the digital signal generated by the digital signal generation unit. An AC signal generating unit for generating a signal that is superimposed and AC, and combining the signals AC converted by the AC signal generating unit in a predetermined arrangement to generate a series of transmission signals; The arithmetic processing unit and a transmission signal generation unit which is characterized in that it comprises the rotating disk.

[0010]

According to the present invention, the number of data of a signal to be transmitted can be reduced. Therefore, even when transmitting the measurement result by the optical measuring device having a plurality of light receiving element rows, the signal can be transmitted as a series of signals, so that the number of channels of the rotary transformer for transmitting the measurement result is one. it can. Further, since the number of data to be transmitted is reduced, the frequency of the carrier signal becomes low, and the transmission stability is improved.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on embodiments with reference to the accompanying drawings, but the present invention is not limited to only such embodiments.

FIG. 1 and FIG. 2 show an optical dimension measuring apparatus A provided with a signal transmission device according to an embodiment of the present invention.
In the drawing, reference numeral 1 denotes a light projecting unit, 2 denotes a light receiving unit, 3 denotes a rotary transformer, 4 denotes a rotating disk, 10 denotes an arithmetic processing unit, and W denotes a wire.

The signal transmission system in the optical dimension measuring apparatus A will be described in comparison with a conventional signal transmission system.

As shown in FIG. 3, a slit-like light beam emitted from the light projecting portion 1 to the wire W is
Light is received by a CD image sensor (configured from 4000 to 5000 elements) 21. In this case, the output of the CCD image sensor 21 is as shown in FIG. 4 because the light receiving amount of the element corresponding to the shadow of the wire W is close to zero.

In the prior art, the output of the CCD image sensor 21 is superimposed with a carrier signal as shown in FIG. FIG. 6 is a schematic diagram of an output signal of the CCD image sensor 21 on which a carrier signal is superimposed. Such signal processing is performed so that the signal can be transmitted by the rotary transformer 3 as an alternating signal (alternating signal) as described above.

As described above, in the conventional signal transmission method, CC
Since the entire output of the D image sensor 21 is transmitted while being superimposed on the carrier signal, a high frequency (period:
Since the carrier signal of (output time of CCD image sensor 21 / number of elements of CCD image sensor 21) must be used, transmission stability is low.

Therefore, in this embodiment, as shown in FIG. 7, a wire position calculating unit 11, a wire diameter calculating unit 12, a digital signal generating unit 13, an alternating signal generating unit 14, a transmission signal generating unit The operation processing device 10 including the
The input of the output of the D image sensor 21 is input and processed before transmission.
To transmit.

That is, the wire position calculating unit 11
The element position of a portion corresponding to the shadow of the wire W is calculated for the output of each CCD image sensor 21 from the output of the D image sensor 21. The calculation is performed for the output of each CCD image sensor 21, and the generation of a digital signal including the position data and the wire diameter data from each value calculated by the digital signal generation unit 13 is performed for the output of each CCD image sensor 21. A carrier signal is superimposed on each of the digital signals generated by the AC signal generator 14 to generate an AC signal, and then the transmission signal generator 1
5, the AC signals are combined in a predetermined arrangement to form a series of transmission signals, which are transmitted by the rotary transformer 3.

In this case, since the output of the CCD image sensor 21 is made by 4000 to 5000 elements, it is necessary to digitally display the position data and the wire diameter of each element.
Up to 16 bits will suffice. Further, in this embodiment, as for the measurement data of the wire W, only the data relating to the position of the element in the portion corresponding to the shadow of the wire W and the wire diameter data are transmitted, so the amount of data to be processed is small. It is also easy to convert data on the wire W measured in a plurality of directions into a series of signals in a predetermined arrangement. Therefore, in this embodiment, data measured in a plurality of directions can be transmitted by one channel of the rotary transformer 3. In addition, since the transmission signal in each measurement direction has 14 to 16 bits, the frequency of the carrier signal (period: output time of CCD image sensor 21 / number of transmission signal bits) is low, and the transmission stability is high.

The arithmetic processing device 10 having the above configuration is
For example, it is realized by storing a program corresponding to the above-described processing contents in a system including a CPU, a ROM, a RAM, a clock, and an input / output interface.

As described above, according to this embodiment, 2
Since the measurement result measured in the direction is transmitted as a series of signals, the number of channels of the rotary transformer 3 to be used can be reduced. Therefore, the applicable range of the optical dimension measuring device is expanded to a line in which the distance between the rolling mills is small. Further, since the frequency of the signal carrying the measurement result becomes lower, the stability of the transmitted signal is also improved.

As described above, the present invention has been described based on the embodiments. However, the present invention is not limited to only the embodiments, and various modifications can be made. For example, in the embodiment, the measurement of the wire is performed in two directions, but may be performed in three directions or four directions. In the embodiment, a rolled wire is described as an example, but applicable wire is not limited to a rolled wire. Furthermore, in the embodiment, the arithmetic processing device is provided with the wire diameter calculating section to calculate the wire diameter, but the calculation of the wire diameter may be performed by a data processing device that receives a signal from the rotary transformer. Furthermore, in the case of measuring only one direction and transmitting only the position data of the wire, the alternating signal may be directly transmitted by a rotary transformer.

[0023]

As described in detail above, according to the present invention,
Since the measurement results measured in a plurality of directions are transmitted as a series of signals in a predetermined arrangement, the number of rotating transformer channels used is reduced, and as a result, the applicable range of the optical dimension measuring device is reduced to the rolling mill and the rolling mill. An excellent effect is obtained in that the line is also extended to a line with a small distance from the machine.

Further, since the frequency of the carrier signal is also low,
An excellent effect of improving the stability of the transmitted signal is also obtained.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an optical dimension measuring device including a signal transmission device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of an arrangement of devices on a rotating disk of the optical dimension measuring device according to the embodiment.

FIG. 3 is an explanatory diagram showing a light receiving state in the CCD image sensor.

FIG. 4 is a schematic diagram of an output signal of a CCD image sensor.

FIG. 5 is a schematic diagram of a conventional carrier signal.

6 is a schematic diagram showing a state in which the carrier signal shown in FIG. 5 is superimposed on the output signal shown in FIG. 4;

FIG. 7 is a schematic diagram of an arithmetic processing device.

FIG. 8 is a schematic diagram of an optical dimension measuring device provided with a conventional signal transmission device.

FIG. 9 is a schematic view of an arrangement of devices on a rotating disk of a conventional optical dimension measuring device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 light emitting unit 2 light receiving unit 3 rotating transformer 4 rotating disk 10 arithmetic processing unit 11 wire rod position calculating unit 12 wire diameter calculating unit 13 digital signal generating unit 14 alternating signal generating unit 15 transmission signal generating unit 21 CCD image sensor A optics Type dimension measuring device W wire rod

Claims (4)

[Claims] 1. A signal transmission device comprising a light receiving element array having a required number of light receiving elements and transmitting a measurement result of a wire measured by an optical measuring device provided on a rotary disk by a rotary transformer. A wire position calculating unit that calculates the position of the wire based on the output from the light receiving element row; a digital signal generating unit that converts the calculated wire position into a digital signal; and a digital signal generated by the digital signal generating unit. A signal transmission device comprising: an arithmetic processing device having an alternating signal generation unit that generates an alternating signal by superimposing a carrier signal on a signal. 2. A signal transmission device comprising a light receiving element array having a required number of light receiving elements and transmitting a measurement result of a wire measured by an optical measuring device provided on a rotating disk by a rotating transformer. A wire rod position calculation unit that calculates the position of the wire rod based on the output from the light receiving element row, and a wire diameter calculation unit that calculates the diameter of the wire rod from the position of the wire rod calculated by the front wire rod position calculation unit, A digital signal generation unit for converting the calculated wire position and wire diameter into a digital signal; and an AC signal for superimposing a carrier signal on each digital signal generated by the digital signal generation unit to generate an AC signal. A generating unit;
An arithmetic processing device having a transmission signal generation unit that generates a series of transmission signals by combining the signals converted by the AC conversion signal generation unit in a predetermined arrangement, is provided on the rotating disk. Characteristic signal transmission device. 3. A signal transmission device having a plurality of light receiving element rows having a required number of light receiving elements and transmitting a measurement result of a wire rod measured by an optical measuring device disposed on a rotating disk by a rotary transformer. A wire position calculating unit that calculates the position of the wire based on the output from the plurality of light receiving element rows; a digital signal generating unit that converts the calculated wire position into a digital signal, and the digital signal generating unit An AC signal generating section for superimposing a carrier signal on each digital signal generated by the above to generate an AC signal, and synthesizing each signal AC converted by the AC signal generating section in a predetermined arrangement. A signal processing device having a transmission signal generating unit for generating a series of transmission signals on the rotating disk. 4. A signal transmission device having a plurality of light receiving element rows having a required number of light receiving elements and transmitting a measurement result of a wire measured by an optical measuring device provided on a rotary disk by a rotary transformer. A wire position calculating unit that calculates the position of the wire based on the output from the plurality of light receiving element rows; and a wire diameter calculation that calculates the wire diameter of the wire from the position of the wire calculated by the front wire position calculating unit. Unit, a digital signal generator for converting the calculated wire position and wire diameter into a digital signal, and a carrier signal superimposed on the digital signal generated by the digital signal generator to generate an AC-converted signal. And a transmission signal generation unit that combines the signals converted by the AC conversion signal generation unit in a predetermined arrangement to generate a series of transmission signals. Signal transmission apparatus characterized by including a processing unit to the rotating disk.