Abstract:
A multicarrier digital transmission signal from digital signal processing unit 1 is converted to an analog signal in analog circuit 2, and is transmitted from transmission lines 61 and 62 via communication transformer 3. Digital signal processing unit 1 includes time carrier detector 12 that detects existence and non-existence of a carrier generated by another apparatus using the transmission line, by using a time waveform of a reception signal and frequency carrier detector 13 that detects existence or non-existence of the carrier by using frequency characteristics of the reception signal. Under the control of the controller 11, carrier detection is performed by switching between activating time carrier detector 12 and frequency carrier detector 13 for operation.
Abstract:
A carrier tape package 20 is used in an electronic components placing apparatus for feeding electronic components by a tape feeder, and has a carrier tape 22 housed in a wound state on a tape reel 21. In the carrier tape package 20, a data storage unit 23, in which an IC tag 25 having carrier tape information containing identification information of electronic components P held in the carrier tape 22 is held in a holder 24, is attached to the tape reel 21. At the instant when the carrier tape 22 is mounted in the tape feeder, the carrier tape information is read out by a reader/writer belonging to the tape feeder from the data storage unit 23 mounted on the leading end portion of the tape feeder.
Abstract:
A communication apparatus includes a transmission signal generation section 1, a transmission signal control section 2, a transmission section 3, a leakage electric power detection section 4, and an electric power control judgment section 5. The transmission signal generation section 1 generates a transmission signal for carrying out transmission using a plurality of sub-carriers, under control of the transmission signal control section 2, and has a transmission electric power control function with respect to each sub-carrier. The leakage electric power detection section 4 detects electric power which is leaked from a transmission line 9 among transmission electric power. The electric power control judgment section 5 judges necessity of transmission electric power control by the transmission signal control section 2, on the basis of a leakage electric power signal from the leakage electric power detection section 4, and in case that it was judged that transmission electric power control is necessary, it notifies that effect to the transmission signal control section 2. The transmission signal control section 2 controls transmission electric power of a sub-carrier, on the basis of the leakage electric power signal from the leakage electric power detection section 4.
Abstract:
A first communication apparatus 100 transmits a pilot signal which was generated by a pilot signal generation section 14, at predetermined timing, and detects an unbalance component of a transmission line 300 at the time of pilot signal transmission in an unbalance component detection section 13, and controls a transmission signal in such a manner that an unbalance component is reduced by a transmission control section 12 on the basis of the detected unbalance component.
Abstract:
A synchronous follow-up apparatus includes a PLL portion that outputs a first clock signal, and a control loop portion. The control loop portion includes a reference frequency signal generating portion that outputs a reference frequency signal, a clock signal generating portion that generates a second clock signal having the same frequency as a frequency of the first clock signal based on the reference frequency signal generated by the reference frequency signal generating portion, and a frequency control signal generating portion that generates a frequency control signal to change the frequency of the second clock signal based on a frequency difference between the first clock signal and the second clock signal that occurs after a predetermined time and outputs the frequency control signal to the clock signal generating portion.
Abstract:
A rack bar (1, 21, 31) includes a shaft member (S1) having a toothed section (2, 12, 22). The toothed section (2, 12, 22) has a plurality of rack teeth (3, 13, 23), and extends over a portion of an entire length of the shaft member (S1) along a longitudinal direction of the shaft member (S1). The shaft member (S1) has a grinding-finished outer peripheral surface extending over the entire length of the shaft member (S1) including the toothed section (2, 12, 22). A method for manufacturing the rack bar (1, 21, 31) includes forming the toothed section (2, 12, 22) by plastic working and grinding the outer peripheral surface to improve shape accuracy.
Abstract:
An apparatus to measure a depth of a hardened layer formed at a surface layer of a quenched workpiece. The apparatus includes an exciting coil configured to generate a magnetic flux to magnetize the workpiece and a detecting coil configured to detect the magnetic flux generated by the exciting coil. The exciting coil has a U-shaped excitation core portion and an excitation coil portion wound on the excitation core portion. The excitation core portion is arranged such that distal ends of magnetic poles of the excitation core portion face the workpiece. The detecting coil has a detection core portion and a detection coil wound on the detection core portion. The detection core portion is arranged between the magnetic poles of the excitation core portion and along a surface of the workpiece.
Abstract:
A heating method, a heating apparatus, and a method for manufacturing a press-molded article using the heating method are provided. Electrodes are placed on a workpiece to extend across a heating target region in a first direction. At least one of the electrodes is moved in a second direction perpendicular to the first direction over the heating target region while applying electric current to the electrodes. A distribution of contact pressure between at least one of the electrodes and the workpiece along the first direction is adjusted, with a plurality of segment regions being defined by dividing the heating target region such that the segment regions are arranged side by side in the first direction, and in accordance with a length of each of the segment regions between the electrodes, to adjust a heating temperature of each of the segment regions of the heating target region.
Abstract:
A shaft diameter enlarging apparatus and a shaft diameter enlarging method are provided. The shaft diameter enlarging apparatus includes a presser to apply pressure to both ends of a shaft in an axial direction, a load generator to apply alternating load in a direction intersecting the axial direction to an intermediate portion of the shaft, a detector to detect an outer diameter of the intermediate portion being enlarged, along with a compression in the axial direction, through the application of the pressure and the alternating load, and a controller to control the presser and the load generator. The detector includes a contact element arranged to contact an outer peripheral surface of the intermediate portion to detect the outer diameter based on a displacement of the contact element. The controller adjusts the pressure applied by the presser and stops the compression of the intermediate portion, based on the detected outer diameter.
Abstract:
A hollow rack bar (10) and a method of manufacturing the hollow rack bar are provided. The hollow rack bar (10) includes a hollow blank pipe portion having a uniform wall thickness, and a rack toothed portion. The rack toothed portion includes teeth, a flat portion (33) having a flat surface (35) and arranged side by side with the teeth in a direction along a center axis of the blank pipe portion, and a slanted portion (34) provided at an end of the flat portion (33) with respect to a direction perpendicular to the center axis and arranged to be lower than the flat portion. A length (t1) of the slanted portion (34) projected on a straight line perpendicular to the center axis and parallel to the surface of the flat portion is longer than zero and equal to or shorter than the wall thickness (t) of the blank pipe portion.