摘要:
A sheet identifying apparatus includes: an excitation coil disposed upstream in a passage through which a sheet inserted into an input port passes and wound on an outer periphery of the passage; a first output unit that detects a magnetization variation of a magnetic element due to the excited excitation coil when the sheet having the magnetic element passes through a region of the passage where the excitation coil is disposed in a state where an AC current is applied to the excitation coil and that outputs a first detection signal when the magnetization variation is detected; and a second output unit that detects that the sheet passes through a region downstream in the passage on the basis of a characteristic of the sheet without using the magnetic element and that outputs a second detection signal when detecting that the sheet passes through the region.
摘要:
When a user who has a magnetic substance attached paper enters a gate which generates a magnetic field, steep magnetization reversal is produced in the magnetic substance by the magnetic field. As a result, pulse current flows into a detection coil provided in the gate, and a generated waveform signal indicating a characteristic transient response is output to a terminal device. The terminal device calculates correlation coefficients of this waveform and a plurality of stored reference waveforms, additionally calculates an average of the calculated correlation coefficients, and determines whether or not the average is equal to or more than a threshold. When the average is equal to or more than the threshold, the terminal device instructs an imaging device to image a user. When the average is below the threshold, the imaging device is not allowed to image the user.
摘要:
A sensing device includes: a magnetic field generating coil that generates an alternating magnetic field in a sensing-target region; a signal inducing coil in which is induced an electric signal corresponding to the alternating magnetic field generated by the magnetic field generating coil; an amplifier that amplifies a third electric signal obtained from the difference between a first electric signal induced in the signal inducing coil in a state where a sensing-target magnetic body is present in the sensing-target region and a second electric signal induced in the signal inducing coil in a state where the magnetic body is not present in the sensing-target region; and a sensing unit that senses, on the basis of the third electric signal amplified by the amplifier, the magnetic body passing through the sensing-target region by sensing a change in the magnetic field resulting from magnetization reversal of the magnetic body.
摘要:
An object detecting apparatus that detects an object including a magnetic body including: a detection signal acquiring unit that acquires a detection signal based on a magnetic signal; a disturbance source detection signal storage unit that stores a detection signal of a disturbance source that generates a disturbance component with respect to the detection signal; a determining unit that determines whether the detection signal acquired by the detection signal acquiring unit contains the disturbance component; an amplitude correction unit that corrects an amplitude of the disturbance source detection signal and generates an amplitude-corrected disturbance source detection signal; a disturbance component suppression unit that generates a determination signal by suppressing the disturbance component contained in the detection signal; and an object determination unit that determines whether the object is the object to be detected based on the determination signal.
摘要:
A paper includes a paper body containing pulp fibers, a low electric-resistance region provided in a layer inside the paper body and being lower than the paper body in electric resistivity, and magnetic bodies arranged inside the low electric-resistance region and having a large Barkhausen effect.
摘要:
A sheet includes a pulp fiber and a linear magnetic material. The linear magnetic material has a substantially large Barkhausen effect. The linear magnetic material also has irregularities at an outer periphery of the linear magnetic material. The sheet in which the magnetic material is inhibited from being exposed at both surfaces of the sheet can be provided.
摘要:
A control gate includes a first exciting coil, a first detection coil, a second exciting coil, a second detection coil, a signal determination unit and an amplification factor setting unit. The first exciting coil forms a first alternating magnetic field in a passage. The first detection coil detects a variation in the first alternating magnetic field. The second exciting coil forms a second alternating magnetic field in the passage. The second detection coil that detects a variation in the second magnetic field. The signal determination unit includes a first amplifier which (i) amplifies a first detection signal of the first detection coil and (ii) determines a passage of the magnetic material based on the amplified first detection signal. The amplification factor setting unit sets a first amplification factor for the first amplifier based on a second detection signal of the second detection coil.
摘要:
A detection system includes: an acquiring unit that acquires document data representative of a document which includes a plurality of pages; a selector that selects, for each page of the document, a first printing sheet which contains a detected element or a second printing sheet which does not contain the detected element such that the first printing sheet is selected for at least one page; a supplier that supplies the first or the second printing sheet selected by the selector; a printer that sequentially prints the document acquired by the acquiring unit on the printing sheets supplied by the supplier; a detector that detects a detected element contained in a printing sheet on which the document is printed by the printer; and a reporter that reports detection of the detected element in a printing sheet by the detector.
摘要:
A recording paper having a magnetic material-containing layer, that includes a magnetic material that generates a large Barkhausen effect and a filler, and is disposed between pulp layers containing a pulp.
摘要:
A control gate includes an exciting coil and a detecting coil. The exciting coil forms an alternating magnetic field in a passageway at an entrance to or an exit from an area where taking out or bringing in of an object is controlled. The detecting coil detects a change of the magnetic field when magnetic substance contained in the object generating a large Barkhausen effect causes magnetic inversion in the alternating magnetic field. The exciting coil is provided above the passageway and has a winding wire wound along a horizontal plane. The detecting coil is provided in a side part of the passageway and has a winding wire wound along a vertical plane which is parallel to a passing direction of the passageway.