A measurement calculator for storing and calculating measurement data comprising computer circuitry having central processing unit circuitry adapted for controlling the status of operations of the computer circuitry and manipulating measurement data therein; memory circuitry having a plurality of memory cells adapted for storing instructions and measurement data for use by the central processing unit circuitry with the measurement data accessed by a user with labels denoted by a plurality of alpha-numeric symbols; display circuitry adapted for displaying operational status indications and labels with the associated measurement data; bus circuitry adapted for transferring computer circuitry instructions and measurement data between the central processing unit circuitry, memory circuitry, and display circuitry; keypad circuitry coupled to the central processing unit circuitry having a plurality of keys adapted for inputting measurement data, performing operations on measurement data, controlling memory, processing, and display operations, and accessing measurement data indexed by the labels; computer instructions resident in the memory circuitry adapted for operating with the computer circuitry for manipulating the measurement data; and power circuitry for energizing and deenergizing the computer circuitry.
The invention is a method and apparatus for measuring the dimensions of a parcel. The invention begins by placing a parcel in the corner of a field of measurement upon a flat surface and against two adjacent walls. At the base of each wall, and along the angle where the adjacent walls meet, is a calibrated reflective strip. The calibration marks on each of the reflective strips are of known size and spacing. One or more sensors are activated and read the number of visible calibrated marks. The one or more sensors transmits this data to a processor which calculates the measurement for the length, width, and height of the parcel by subtracting the observed visible calibration marks from the number of possible calibration marks. If the flat surface, upon which the parcel has been placed is the weighing surface of a scale, then weight for the parcel can be determined. Each of the then calculated dimensions (length, width, height, and weight) can then be displayed and/or transmitted to a parcel processing system. Alternatively, the flat surface upon which the parcel is to be placed would require only one adjoining wall. Calibration marks are placed directly upon the flat surface and upon the one adjoining wall. The calibration marks on the flat surface appear as lines forming a chevron pattern progressing outwardly from a surface corner. The calibration marks on the adjoining wall are placed upon the wall from bottom to top.
An apparatus and method for calibrating machine vision measuring systems that have more than one camera are disclosed. A first calibration target is mounted in a fixed relationship to a first camera of the machine vision measuring system. A third camera mounted in a fixed relationship to a second camera of the machine vision measuring system. Second and third calibration targets are mounted in a fixed relationship to one another and viewable by the first camera and by the third camera. A data processor is programmed to compute calibration of the first camera and the second camera, based on a position of the second calibration target relative to the third calibration target and a position of the first camera with respect to the third camera. The apparatus and method provide a way to continuously measure the positions of the cameras used in the measuring system to calibrate the system.
A small-sized alarm device is hung on a doorknob to emit an alarm sound upon detecting that a human body contacts or approaches the doorknob. The alarm device has data processor, such as a calculator and the like, in addition to an alarm and an electro-optic display for displaying data processed by the data processor and information related to the operation of the alarm. To the alarm device is rotatably mounted a hanging member for hanging the alarm device on a doorknob. The hanging member is fit into the case of the alarm device when in not use or is erected from the case when the alarm device is hung on the doorknob.
The invention relates to a multifunctional tool such as, for example, a multifunctional pocket knife which is characterized by having at least one measuring and display device (12, 14) for measuring and displaying a physical value.
