Abstract: A measuring apparatus employing a differential transformer includes a high-frequency oscillator which generates a high-frequency signal having a frequency higher than the excitation frequency of the differential transformer, a frequency divider which divides the high-frequency signal to generate a driving signal for the differential transformer, a multiplier or divider which reduces the frequency of the high frequency signal by the frequency of the driving signal, a mixer which mixes the output from the multiplier or the divider with the output from the differential transformer, a high-pass filter or a band-pass filter which cuts a low-frequency component of the output from the mixer, and a double balanced mixer which synchronously detects the output from the high-pass filter or the band-pass filter with the use of the high-frequency signal.

Abstract: A POS system is made up of: a POS terminal having a printing apparatus for printing on a receipt based on printing data, and a terminal apparatus for obtaining input information inputted by a user and for generating receipt printing information; a POS server connected to the POS terminal through a network, for controlling the POS terminal; a memory card for providing advertising information; and printing data generating part for generating printing data by adding the advertising information provided by the memory card to the receipt printing information obtained by the terminal apparatus. The printing data generating part is constituted by an additional apparatus connectable to the printing apparatus.

Abstract: A POS system is made up of: a POS terminal having a printing apparatus for printing on a receipt based on printing data, and a terminal apparatus for obtaining input information inputted by a user and for generating receipt printing information; a POS server connected to the POS terminal through a network, for controlling the POS terminal; a memory card for providing advertising information; and printing data generating part for generating printing data by adding the advertising information provided by the memory card to the receipt printing information obtained by the terminal apparatus. The printing data generating part is constituted by an additional apparatus connectable to the printing apparatus.

Abstract: A measuring apparatus employing a differential transformer includes a high-frequency oscillator which generates a high-frequency signal having a frequency higher than the excitation frequency of the differential transformer, a frequency divider which divides the high-frequency signal to generate a driving signal for the differential transformer, a multiplier or divider which reduces the frequency of the high frequency signal by the frequency of the driving signal, a mixer which mixes the output from the multiplier or the divider with the output from the differential transformer, a high-pass filter or a band-pass filter which cuts a low-frequency component of the output from the mixer, and a double balanced mixer which synchronously detects the output from the high-pass filter or the band-pass filter with the use of the high-frequency signal.

Abstract: A POS system is made up of: a POS terminal having a printing apparatus for printing on a receipt based on printing data, and a terminal apparatus for obtaining input information inputted by a user and for generating receipt printing information; a POS server connected to the POS terminal through a network, for controlling the POS terminal; a memory card for providing advertising information; and printing data generating part for generating printing data by adding the advertising information provided by the memory card to the receipt printing information obtained by the terminal apparatus. The printing data generating part is constituted by an additional apparatus connectable to the printing apparatus.

Abstract: A POS system is made up of: a POS terminal having a printing apparatus for printing on a receipt based on printing data, and a terminal apparatus for obtaining input information inputted by a user and for generating receipt printing information; a POS server connected to the POS terminal through a network, for controlling the POS terminal; a memory card for providing advertising information; and printing data generating part for generating printing data by adding the advertising information provided by the memory card to the receipt printing information obtained by the terminal apparatus. The printing data generating part is constituted by an additional apparatus connectable to the printing apparatus.

Abstract: The object of present invention is to provide a sensitivity calibrating method for a detector of a comparator, which enables easy and highly accurate sensitivity calibration for a first and a second detector for measuring opposing position of an object. Heights of two pairs of reference gauge blocks, a first reference gauge block W1 and a second reference gauge block W2, and the second reference gauge block W2 and a third reference gauge block W3 is first measured, and thereafter, sensitivity coefficients for calibrating the sensitivity of an upper detector 10 and a lower detector 20 are calculated by applying the measured value to a predetermined formula. The calculation is repeated three times, and each value is renewed for the upper and the lower detector 10 and 20 respectively.

Abstract: In one type of an angular velocity sensor, a constant vibration is applied in an X direction to one end of a vibrator which is fixed at another end and the vibrator vibrates in a Y direction perpendicular to the X direction by an action of Coriolis force caused by the angular velocity of the vibrator about the Z axis with an amplitude proportional to an angular velocity about a Z axis. An angular velocity sensor of this invention utilizes a photoelectric encoder for measurement of the vibration amplitude of the vibrator in the Y direction. The encoder includes a main scale mounted on the free end of the vibrator; an index scale mounted on a housing of the sensor to face the main scale; and a photoelectric element for sensing light reflected from the main scale and passing through the index scale.