DE102010021317A1 - Hand-held device for measuring mass of e.g. cuboid-shaped objects, has measuring panels determining ends of intersection lines, where mass of side surface of objects is calculated by data of intersection lines - Google Patents

Abstract

The device (1) has a set of measuring panels (E1a, E1b, E2) radiating laser beams, arranged parallel to each other and formed on detected height-or width mass of a side surface of cuboid-shaped objects (3). The measuring panels determine intersection lines of the measuring panels with the side surface of the cuboid-shaped objects by received reflections and determine ends of the intersection lines. The mass of the side surface of the objects is calculated by data of the intersection lines. The measuring panels are arranged on the side surface of the cuboid-shaped objects. An independent claim is also included for a method for measuring a mass of cuboid-shaped objects with a hand-held device.

Description

The invention relates to a handheld device for detecting the dimensions of a cuboid object or a cuboid enclosure of an object by fanned laser beams.

Stationary devices for detecting the dimensions and bar codes of packets are known. Such devices have treadmills on which the packages pass through large racks on which measuring devices and detection devices are mounted. In addition, stationary devices are known which scan objects by laser to detect their shape and size. This is done in order to reproduce the objects figuratively and in particular three-dimensional. All devices and devices have in common that they are structurally complex and have large outer dimensions.

The object of the invention is to provide a hand-held device for detecting the dimensions of cuboid objects, which is easy to handle and has small dimensions.

This object is achieved in that to the detected height or width dimension of a side surface of the object, a pair of two mutually parallel measurement planes of fanned laser beams is emitted, which hits the object side surfaces and the cut lines of the measurement planes with the received by the reflections Object side surface and the ends of the cut lines determined by the values of at least one measure of the object side surface is calculated.

A handset of this type is easy and quick to use. Neither larger racks nor treadmills are needed. The device has small outer dimensions and does not have to be aligned at right angles to the object to be measured. It is particularly advantageous for use with cuboid objects, since then extremely accurate measurement results can be achieved.

Advantageously, this handset is suitable for packages such as packages and boxes to their outer dimensions, d. H. their height, width and depth to capture within a very short time, these measurements are read on the handset. It is not necessary that reflection points on the object to be measured must be mounted beforehand.

A particularly simple, quick and accurate detection of the dimensions is achieved when two pairs of parallel measurement planes are radiated, which are at a right angle to each other to obtain the length, width and height dimension of the object. It is also advantageous if it has a display on which the measurement results are displayed.

• – wenn durch die erste Messebene eines ersten Messebenenpaares eine erste Schnittlinie einschließlich mindestens eines ihrer beiden Enden mit einer Gegenstandseitenfläche ermittelt wird,
• – wenn durch eine zur ersten Messebene rechtwinklig angeordnete dritte Messebene eine dritte Schnittlinie mit derselben Gegenstandseitenfläche ermittelt wird,
• – wenn der Schnittpunkt beider Schnittlinien miteinander ermittelt wird, durch den die erste Schnittlinie in zwei Abschnitte aufgeteilt wird,
• – wenn durch eine zweite zur ersten Messebene parallele Messebene des ersten Messebenenpaares eine zweite Schnittlinie einschließlich mindestens einen ihrer beiden Enden ermittelt wird,
• – wenn der Schnittpunkt der zweiten Schnittlinie mit der dritten Schnittlinie ermittelt wird, durch den die zweite Schnittlinie in zwei Abschnitte aufgeteilt wird,
• – wenn aus der Differenzlänge von h2 – h1, dem Abstand der zwei Messebenen des ersten Messebenenpaares voneinander und dem Winkel zwischen der ersten Schnittlinie und der Senkrechten der Gegenstandsseitenfläche die Höhe und/oder Breite der Gegenstandseitenfläche errechnet und angezeigt wird.

A particularly advantageous measuring method with such a hand-held device is then given,

• If a first cutting line including at least one of its two ends with an object side surface is determined by the first measuring plane of a first measuring plane pair,
• If a third cutting line with the same object side surface is determined by a third measuring plane arranged at right angles to the first measuring plane,
• If the point of intersection of both lines of intersection is determined with each other, by which the first intersection line is divided into two sections,
• If a second cutting line including at least one of its two ends is determined by a second measuring plane of the first measuring plane pair parallel to the first measuring plane,
• If the point of intersection of the second cutting line with the third cutting line is determined, by which the second cutting line is divided into two sections,
• If the height and / or width of the object side surface is calculated and displayed from the difference length of h2-h1, the distance between the two measurement planes of the first measurement plane pair and the angle between the first cut line and the vertical of the object side surface.

It is preferably proposed that, after determining the height and the width of the first article side surface, the third dimension of the article, in particular its length, is determined and calculated on a second article side surface by the same measurement planes.

An embodiment of the invention is shown schematically in the drawings and will be described in more detail below. Show it

1 3 is a perspective view of the two measuring planes which strike a cuboid object,

2 a cuboid object to be measured, in particular a package with the lines of intersection of the measurement planes on two side surfaces.

The handset 1 has at least one laser, the laser beams fanned so that they each lie in a measuring plane E. The hand-held device emits laser beams which are fanned out in planes E1 to E3 in the form of two laser planes E1 and E2 which are approximately parallel to each other and which are in 1 are substantially perpendicular, where "parallel" is understood that when hitting a wall, the measurement planes E1 and E2 form two cut lines that are substantially parallel to each other. The starting point of the measurement levels in the handheld device, however, is the same generating laser, so that both measurement planes are generated in the embodiment of the same laser.

Alternatively, however, each measurement plane can be generated by a corresponding own laser, in which case the responsible for a pair of measurement planes pair with each other form a distance and then the two measurement planes are exactly parallel to each other.

The hand-held device also contains at least one sensor, which records the lines and end points generated on the object by laser beams in the form of their reflections and sends them to the computer which evaluates them.

In the in 1 illustrated embodiment of the generated in the handset 1 arranged laser two measurement planes E1a and E1b, which are horizontal to the ground 2 are arranged substantially perpendicular or slightly oblique and form a first pair of measurement planes.

Furthermore, the handset generates 1 a third measuring plane E2, which is perpendicular to the measuring planes E1a and E1b and thus approximately horizontally.

In 2 is shown as the three measurement planes E1a, E1b, E2 on an object to be measured in the form of a cuboid object 3 meet, for example, this object is a cuboid package or a cuboid box with a bottom lying on the ground, so that the side surfaces of the object 3 vertical and the top horizontally.

Through these three levels of measurement becomes a measure of the object 3 determined as follows:
To the height H of the object 3 To determine, the measuring plane E1b generates a section line h2, h3 with the end points P3 and P4 at the edge of the vertical side surface F1, which faces the handset. Furthermore, the second measuring plane E1a generates a second cutting line h1, h4, with the end points P2 and P3. The handset detects the distance a of the two lines of intersection to each other in the uppermost region and thus through the point P3 running, wherein the arithmetic unit of the handset still calculates the difference of the lengths of both cut lines, the in 2 represented by "b". The distances a and b are at right angles to each other and thus form a right triangle with the hypotenuse c. The angle a and c form with each other is equal to the angle α formed by the first intersection h2, h3 with the height H, the length of the first intersection having its end points P3 and P4 being known.

Further, the angle α and the fact that the height H is vertical are known. Thus, by these values, the length of the height H and thus the height of the object 3 calculated and displayed on the handset display.

• – wenn durch die erste Messebene E1a eines ersten Messebenenpaares E1a + E1b eine erste Schnittlinie mit ihrem unteren Ende P2 und ihrem oberen Ende P3 auf einer Gegenstandsseitenfläche F1 ermittelt wird,
• – wenn durch eine zum ersten Messebenenpaar E1a + E1b rechtwinklig angeordnete zweite Messebene E2 eine Schnittlinie mit ihrem ersten (linken) Ende P5 und ihrem zweiten (rechten) Ende P6 auf der gleichen Gegenstandsseitenfläche F1 ermittelt wird,
• – wenn der Schnittpunkt S1 der Linien E1b und E2 ermittelt wird, durch den E1b in zwei Abschnitte h2 + h3 aufgeteilt wird,
• – wenn der Schnittpunkt S2 der Linien E1a und E2 ermittelt wird, durch den der Abstand vom Schnittpunkt S1 der Ebenen E1b und E2 S1 zu ihrem Ende der Schnittlinie E1a am oberen Rand der Gegenstandsseitenfläche F1 im Punkt P3 ermittelt wird h1,
• – wenn durch die Differenz von h1 und h2 die erste Seite b eines rechtwinkligen Dreiecks abc ermittelt wird,
• – wenn durch den Abstand von S1 zu S2 auf der Ebene E2 die zweite Seite desselben rechtwinkligen Dreiecks ermittelt wird tanα = a / b; α = 90° – γ
• – wenn durch h2 + h3 und dem aus dem Dreieck abc resultierenden Ergänzungswinkel alpha die Höhe H ermittelt wird,
  
• – wenn durch Anlegen von α im Punkt P6, des rechten Winkels β in P7, dem daraus resultierenden Winkel γ in P5 des rechtwinkligen Dreiecks die Breite B ermittelt wird cosα = B / E2; B = E2·cosα
• – wenn für die Längsseite (Oberseite) F2 des Gegenstandes der Auftreffwinkel α zugrunde gelegt wird, aus der Länge von E3 (der fortlaufenden Linie E1b auf der Oberseite F2) und der Größe von α eine zu H analoge Berechnung für L erfolgt.

A technically even more accurate calculation of the object with such a hand-held device is then given

• If a first section line with its lower end P2 and its upper end P3 on an object side surface F1 is determined by the first measuring plane E1a of a first measuring plane pair E1a + E1b,
• If a section line with its first (left) end P5 and its second (right) end P6 on the same object side surface F1 is determined by a second measuring plane E2 arranged at right angles to the first pair of measuring planes E1a + E1b,
• If the intersection S1 of the lines E1b and E2 is determined, dividing E1b into two sections h2 + h3,
• If the point of intersection S2 of the lines E1a and E2 is determined by which the distance from the intersection S1 of the planes E1b and E2 S1 to their end of the intersecting line E1a at the upper edge of the article side surface F1 at the point P3 is determined h1,
• If the first side b of a right-angled triangle abc is determined by the difference between h1 and h2,
• If the second side of the same right-angled triangle is determined by the distance from S1 to S2 on plane E2 tanα = a / b; α = 90 ° - γ
• If the height H is determined by h2 + h3 and the supplementary angle alpha resulting from the triangle abc,
  
• If the width B is determined by applying α at the point P6, the right angle β in P7, the resulting angle γ in P5 of the right-angled triangle cosα = B / E2; B = E2 · cosα
• If, for the longitudinal side (upper side) F2 of the object, the angle of incidence α is taken as the basis, then from the length of E3 (the continuous line E1b on the upper side F2) and the size of α a calculation analogous to H is made for L.

Thus, the three sides L, B, H can be determined independently of the device position, provided that the required lines E1a, E1b and E2 are displayed on the measurement object.

Alternatively or additionally, these data can also be transferred from the handset to a computer to be stored there, and in particular to be displayed on the display.

Of importance in this measurement method is that the handset 1 does not have to be held exactly vertical, ie the first pair of measurement planes does not necessarily perpendicular to the horizontal surface 2 stand, but the handset can also be held at an angle, as is the case in the 2 show marked measuring levels. Even with this oblique holding accurate measurement results can be achieved.

This makes it possible to obtain exact measured values through the mutually parallel measuring planes or the pair of measuring planes and the third measuring plane perpendicular thereto. For this purpose, either three lasers or two lasers (one for the measuring plane pair and one for the right-angled measuring planes) are used, or else there is only one laser in the device, which generates all three measuring planes by calculation.

In one embodiment, the handset has only a single laser but is controlled to produce the various levels of measurement. Alternatively, the handset has two or more lasers, preferably a separate laser for each measurement plane.

The operation of the handset is the following:
Two laser beams are fanned out by a prism into a plurality of measuring beams. The values of one level give the width of the object, the values of another level give height and length.

The prisms are arranged so that the measuring planes consisting of measuring beams E1a, E1b and E2 are at right angles to each other. These measurement planes are directed to the object to be measured, so that a visible cross of the two planes is displayed on the vertical side of the object. The meter must be aligned so that the perpendicular measuring beam on the top of the object continues to run.

A right-angled position to the object to be measured is not required. The jetting of the measuring beams onto the object takes place in three dimensions (1st length, 2nd width, 3rd height), so that the dimensions of the object can be calculated from the three measured values.

The scanner performs a total number of measurements on each of the smeared pages, each one always having an increasingly different value from the adjacent measurement. At the respective edges of the measurement object, the length of the measurement beam changes significantly, and the next measurement point has a significantly different value. This change is recognizable, the addition of the measured values with changing values gives the measure of the length of the painted sides of the object. At the edges of the object, the measuring beam experiences a serious change in its length (parameter change). The distances determined between these two parameter changes result in the respective length of the page.

In order to make the measurement independent of a perpendicular position of the measuring device to the object, two independent control measurements are automatically taken at right angles from the axis of the plane of the plane E1 of the measuring cross at a defined distance.

The first control measurement (K.1) derives its value from the distance between the plane E1 and the upper edge of the object. The second control measurement (K.2) is performed with a separate laser beam.

The arithmetic mean of the two control measurements K.1 and K.2 makes it possible to determine the deviation from the parallelism of the plane E1 to the edge of the object. A trigonometric function creates a virtual parallelism. The resulting length of the plane E1 then represents the actual side length of the object.

From the value found, the program concludes by means of trigonometric function on the length of the object (level E3).

From the values found in this way, the complete dimensions of the object can be calculated. The determined data are stored in the device and combined with the integrated barcode reader into a data set containing all the required information. Via WLAN or via USB interface, the data sets are fed to external computers for further processing.

Claims (4)

Hand-held device for detecting the dimensions of a cuboid object ( 3 ) or a cuboid enclosure of an object by fanned laser beams, characterized in that to be detected height or width dimension (H, B) of a side surface (F1) of the object, a pair of two parallel measuring planes (E1, E2) of fanned laser beams which is incident on the object side surfaces (F1) and which, by the received reflections, the intersection lines (h1 to h4, 61, 62) of the measurement planes (E1, E2) with the object side surface (F1) and the ends of the intersection lines (P, M ), by whose values at least one measure (H) of the object side surface is calculated. Hand tool according to claim 1, characterized in that two pairs of parallel measuring planes (E1 to E4) are emitted, which are at a right angle to each other to obtain the length, width and height dimension of the object. Hand tool according to claim 1 or 2, characterized in that it comprises a display on which the measurement results are displayed. Measuring method with a hand-held device according to one of the preceding claims, characterized in that through the first measuring plane E1a of a first measuring plane pair (E1a + E1b) a first cutting line with its lower end (P2) and its upper end (P3) on an object side surface (F1 ) is determined, that a cut line with its first (left) end (P5) and its second (right) end (P6) on the same object side surface (E2) arranged at right angles to the first plane pair (E1a + E1b) ( F1), - that the point of intersection (S1) of the lines / E1b and E2) is determined, by which E1b is divided into two sections (h2 + h3), - that the intersection (S2) of the lines (E1a and E2) determining the distance from the intersection point (S1) of the planes (E1b and E2) (S1) to its end of the intersection line (E1a) at the upper edge of the object side surface (F1) at the point (P3) (h1), that by the difference of h1 and h2 the first side b of a right triangle (abc) is determined, - that by the distance from S1 to S2 on the plane (E2), the second side of the same right triangle through tan α = a / b and α = 90 ° - γ is determined - that by h2 + h3 and the resulting from the triangle (ABC) supplementary angle alpha, the height (H) by

is determined, and - that by applying α in the point (P6), the right angle β in P7, the resulting angle γ in P5 of the right triangle by the width (B) by cosα = B / E2 and B = E2 · cosα is determined, and - that for the long side (top F2) of the object of the angle of incidence α is based, from the length of E3 (the continuous line E1b on the top F2) and the size of α a calculation analogous to H for the length L of the object ( 3 ) is determined.

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