Digital indication type length measuring system

A digital indication type length measuring system, comprising:

• at least one length measuring means having a measuring element which can be successively brought into contact with a plurality of workpieces to be measured, having a digital indicator, and having means for causing said digital indicator to display for each of the workpieces a respective displacement value representative of the position of said measuring element when in contact with such workpiece and with respect to a reference position of said measuring element;
• and data processor means which is separate from and connected by a cable to said length measuring means and which has indicator means for indicating each said displacement value of the measuring element;
• wherein said length measuring means includes encoder means responsive to movement of said measuring element for producing an electric signal representative of each said displacement value of said measuring element, and includes output circuit means responsive to said electric signal from said encoder means for outputting onto said cable information representative of each said displacement value;
• wherein said data processor means includes input circuit means for receiving said information from said output circuit means through said cable, processing means for calculating quality control data from the information received by said input circuit means, said quality control data including a histogram, and printer means for printing out on an elongate sheet of paper the quality control data from said processing means, said printer means printing said histogram on the paper in a size corresponding to a width of the paper;
• wherein successive transmissions of information sent across said cable by said output circuit means each include a measured displacement value;
• and wherein said processing means includes means for storing preset upper limit and lower limit values which bound a range of values containing a reference value of a particular workpiece dimension to be measured and for storing a preset division number identifying a number of equal sections into which said range is divided, and includes means for determining which said section of said range each said measured displacement value data belongs to, for determining and storing the frequency of the measured displacement values for each said section, for determining the maximum frequency of said section frequencies, for thereafter calculating a first quotient by dividing said maximum frequency by a predetermined number, for thereafter calculating for each said section a respective second quotient by dividing the frequency for such section by a coefficient of weight which is an integer larger in value than said first quotient, and for thereafter determining for each said section the minimum integer which is larger in value than the second quotient, said histogram showing for each of said sections the corresponding minimum integer.