CN108627063B - Digital display caliper with adjustable measuring range - Google Patents
Digital display caliper with adjustable measuring range Download PDFInfo
- Publication number
- CN108627063B CN108627063B CN201810790122.3A CN201810790122A CN108627063B CN 108627063 B CN108627063 B CN 108627063B CN 201810790122 A CN201810790122 A CN 201810790122A CN 108627063 B CN108627063 B CN 108627063B
- Authority
- CN
- China
- Prior art keywords
- measuring arm
- arm
- measuring
- fixed
- support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005259 measurement Methods 0.000 claims description 54
- 125000006850 spacer group Chemical group 0.000 claims description 16
- 230000007246 mechanism Effects 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 6
- 230000008859 change Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/38—Gauges with an open yoke and opposed faces, i.e. calipers, in which the internal distance between the faces is fixed, although it may be preadjustable
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention relates to a digital display caliper with an adjustable measuring range, which comprises a caliper body, a sensor and a singlechip; at a measured length of L 1 An included angle formed by the movable measuring arm relative to the fixed measuring arm is alpha; the lengths of the fixed measuring arm and the movable measuring arm are R; the singlechip is also used for calibrating the length R and the included angle alpha to adjust the measuring range of the caliper body. The beneficial effects of the invention are as follows: by adjusting the length R and/or the length L of the fixed measuring arm and the movable measuring arm 1 And when the movable measuring arm forms an included angle alpha relative to the fixed measuring arm, the measuring range of the caliper gauge is adjustable, and the application range of the caliper gauge is enlarged.
Description
Technical Field
The invention relates to the field of measuring instruments, in particular to a digital display caliper with an adjustable measuring range.
Background
The caliper gauge is a measuring tool with two feet or claws for measuring thickness, diameter, caliber and distance between surfaces, and is widely used in the field of machining. The callipers are generally classified into an inner diameter calliper and an outer diameter calliper. The measuring range of the common callipers is very small, one calliper can only correspond to the measurement of a certain workpiece size, and when the workpiece size is changed, the callipers cannot be used, so that a great number of callipers are idle. Therefore, in order to expand the measuring range of the caliper, providing a digital caliper with an adjustable measuring range is one of the problems that a person skilled in the art should address.
Disclosure of Invention
In summary, in order to overcome the defects of the prior art, the technical problem to be solved by the present invention is to provide a digital display caliper with an adjustable measurement range.
The technical scheme for solving the technical problems is as follows: a digital display caliper with an adjustable measuring range comprises a caliper body, a sensor and a singlechip; the caliper body comprises a fixed measuring arm and a movable measuring arm which rotates relative to the fixed measuring arm to measure; the sensor is an absolute sensor and is used for generating corresponding electric signals after the movable measuring arm rotates relative to the fixed measuring arm and measuring the rotating angle of the movable measuring arm; the singlechip is used for calculating a measurement result according to the angle value measured by the sensor; at a measured length of L 1 An included angle formed by the movable measuring arm relative to the fixed measuring arm is alpha; the lengths of the fixed measuring arm and the movable measuring arm are R;
the singlechip is also used for calibrating the length R and the included angle alpha to adjust the measuring range of the caliper body after independently adjusting the lengths R of the fixed measuring arm and the movable measuring arm;
or the singlechip is also used for calibrating the length R and the included angle alpha to adjust the measuring range of the caliper body after independently adjusting the position of the movable measuring arm relative to the fixed measuring arm;
or the singlechip is further used for calibrating the length R and the included angle alpha to adjust the measuring range of the caliper body after simultaneously adjusting the length R of the fixed measuring arm and the movable measuring arm and the position of the movable measuring arm relative to the fixed measuring arm.
The beneficial effects of the invention are as follows: by adjusting the length R and/or the length L of the fixed measuring arm and the movable measuring arm 1 And when the movable measuring arm forms an included angle alpha relative to the fixed measuring arm, the measuring range of the caliper gauge is adjustable, and the application range of the caliper gauge is enlarged.
Based on the technical scheme, the invention can also be improved as follows:
further, the singlechip calibrates the length R and the included angle alpha according to the following method:
step one, the measuring lengths of the calliper body are L respectively 1 And L 2 Is a standard block of (2): when the measurement length is L 1 The sensor outputs the angle alpha of the position of the movable measuring arm relative to the absolute zero position of the sensor 1 Feeding the singlechip with the data; when the measurement length is L 2 The sensor outputs the angle alpha of the position of the movable measuring arm relative to the absolute zero position of the sensor 2 For the singlechip, the singlechip calculates the length R and the included angle alpha according to a trigonometric function and through the following formula:
and step two, the singlechip stores the calculated length R and the included angle alpha to finish calibration.
The beneficial effects of adopting the further scheme are as follows: realize the length R and the measurement length L of the fixed measurement arm and the movable measurement arm 1 And the included angle alpha formed by the movable measuring arm relative to the fixed measuring arm is calibrated, so that the adjustable measuring range of the caliper gauge is realized by adjusting the length R of the fixed measuring arm and the movable measuring arm and/or the position of the movable measuring arm relative to the fixed measuring arm, and the application range of the caliper gauge is enlarged.
Further, after calibrating the length R and the included angle α, the single chip microcomputer measures L according to the position a of the movable measuring arm output by the sensor during L measurement 1 And when the measuring arm is positioned at the position B, obtaining the rotation angle theta of the position A relative to the position B, and finally calculating a measuring result L through the following formula:
the beneficial effects of adopting the further scheme are as follows: the length R and the measuring length L of the fixed measuring arm and the movable measuring arm through calibration 1 And when the included angle alpha formed by the movable measuring arm relative to the fixed measuring arm obtains an actual measuring result, the measuring precision is ensured.
Further, the caliper body further comprises a shell, a display unit and a rotating handle; one end of the fixed measuring arm is fixed in the shell, and the other end of the fixed measuring arm extends out of the shell to form a fixed measuring head; one end of the dynamic measurement arm is rotatably arranged in the shell, and the other end of the dynamic measurement arm extends out of the shell to form a dynamic measurement head; one end of the rotating handle is positioned in the shell and is in linkage connection with the movable measuring arm, and the other end of the rotating handle extends out of the shell to form an operating end for manually driving the movable measuring arm to rotate relative to the fixed measuring arm; the sensor is positioned in the shell, generates corresponding electric signals after the movable measuring arm rotates and measures the rotating angle of the movable measuring arm, the singlechip is positioned in the shell, calculates a measuring result according to the angle value measured by the sensor, and the display unit is positioned at the front side of the shell and displays the measuring result calculated by the singlechip.
Further, the housing includes a front cover, a support, and a rear cover; the front cover and the rear cover are respectively detachably arranged on the front side and the rear side of the support; the singlechip is positioned between the support and the front cover; the display unit is positioned on the inner side wall of the front cover, and an observation window is arranged on the front cover at a position corresponding to the display screen of the display unit;
a rotating shaft is rotatably arranged at the front end of the support corresponding to the position between the front cover and the rear cover, and the support is penetrated by the rotating shaft; one end of the dynamic measurement arm is detachably arranged on the rotating shaft through transition fit and corresponds to the position between the support and the rear cover, and the other end of the dynamic measurement arm extends to the outer side of the front cover or the support or the front end of the rear cover; one end of the fixed measuring arm is fixed at a position corresponding to one side of the rotating shaft on the support, and the other end of the fixed measuring arm extends to the outer side of the front end of the front cover or the support or the rear cover; one end of the rotating handle is fixedly connected to the rotating shaft at a position corresponding to the position between the support and the front cover, and the other end of the rotating handle penetrates through the side wall of the support and then extends to the outside of one side of the front cover, the support or the rear cover; the side wall of the support is provided with a bar-shaped hole corresponding to the rotating handle for the rotating handle to swing so as to drive the movable measuring arm to rotate, and the support is provided with a limiting pin corresponding to the bar-shaped hole for controlling the swing amplitude of the rotating handle.
Further, conical holes are formed in the two ends of the rotating shaft, and screws which are propped against the rotating shaft through the conical holes are respectively arranged at positions, corresponding to the two ends of the rotating shaft, of the front cover and the rear cover.
Further, the sensor includes a transmitting plate, a spacer, and a receiving plate; the transmitting plate, the spacer and the receiving plate are all fan-shaped structures taking the rotating shaft as the circle center; the transmission plate and the receiving plate are fixed on one side, close to the front cover, of the support at intervals, the spacer is rotatably arranged between the transmission plate and the receiving plate, and the spacer is connected with the position, corresponding to the position between the support and the rotating handle, on the rotating shaft in a linkage mode through a connecting piece.
Further, the device also comprises a force control mechanism for ensuring that the fixed measuring head of the fixed measuring arm and the movable measuring head of the movable measuring arm have the same measuring force when measuring objects with the same size; the force control mechanism is positioned on the rotating shaft and the support.
Further, the force control mechanism comprises a torque arm, a pull rod and a spring; one end of the torque arm is fixed on the rotating shaft at a position corresponding to the position between the dynamic measurement arm and the partition plate; the two pull rods are oppositely arranged, one pull rod is positioned at one end of the torque arm far away from the rotating shaft, and the other pull rod is positioned at the corresponding position of the support; the two ends of the spring are respectively connected to the two pull rods so as to generate the same deformation when the movable measuring arm rotates for the same angle each time, and therefore the fixed measuring head of the fixed measuring arm and the movable measuring head of the movable measuring arm are guaranteed to have the same measuring force when measuring the same size.
The beneficial effects of adopting the further scheme are as follows: the spring force formed when measuring the same size, namely the measuring force is the same, guarantees the uniformity of measuring force to improve the degree of accuracy of measurement.
Further, a positioning column which is used for ensuring that the length R value of the fixed measuring arm is consistent with that of the movable measuring arm by positioning the fixed measuring arm is arranged on the support corresponding to the fixed measuring arm.
The beneficial effects of adopting the further scheme are as follows: the support is provided with a positioning column which is used for ensuring the consistency of the length R of the fixed measuring arm and the length R of the movable measuring arm by positioning the position of the fixed measuring arm, the positioning column is of a protruding structure on the support, and the fixed measuring arm is arranged at one end of the support and corresponds to the positioning column, and a mounting hole corresponding to the positioning column is formed in the position of the fixed measuring arm.
Drawings
FIG. 1 is a three-dimensional view of the present invention (with a portion of the front cover removed);
FIG. 2 is an exploded view of the present invention;
FIG. 3 is a rear plan view of the present invention (with the rear cover removed);
FIG. 4 is a front plan view of the present invention;
FIG. 5 is a cross-sectional view A-A of FIG. 4;
FIG. 6 is a calibration schematic diagram of the present invention;
fig. 7 is a measurement schematic of the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. the single chip microcomputer, 2, the display unit, 3, the fixed measuring arm, 4, the movable measuring arm, 5, the rotating handle, 6, the front cover, 7, the support, 8, the rear cover, 9, the rotating shaft, 10, the limiting pin, 11, the screw, 12, the transmitting plate, 13, the spacer, 14, the receiving plate, 15, the torque arm, 16, the pull rod, 17, the spring, 18, the locating column, 19 and the measured object.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
As shown in fig. 1-5, a digital display caliper with an adjustable measuring range comprises a caliper body, a sensor and a singlechip 1. The caliper body comprises a fixed measuring arm 3 and a movable measuring arm 4 which rotates relative to the fixed measuring arm 3 to measure. The sensor is an absolute sensor, and is used for generating corresponding electric signals after the movable measuring arm 4 rotates relative to the fixed measuring arm 3 and measuring the rotation angle of the movable measuring arm 4. The singlechip 1 is used for calculating a measurement result according to the angle value measured by the sensor. The caliper body further comprises a shell, a display unit 2 and a rotating handle 5. One end of the fixed measuring arm 3 is fixed in the shell, and the other end extends out of the shell to form a fixed measuring head. One end of the dynamic measurement arm 4 is rotatably arranged in the shell, and the other end extends out of the shell to form a dynamic measurement head. One end of the rotating handle 5 is located in the shell and is in linkage connection with the movable measuring arm 4, and the other end of the rotating handle extends out of the shell to form an operating end for manually driving the movable measuring arm 4 to rotate relative to the fixed measuring arm 3. The sensor is positioned in the shell, generates corresponding electric signals after the movable measuring arm 4 rotates and measures the rotation angle of the movable measuring arm 4, the singlechip 1 is positioned in the shell, calculates a measurement result according to the angle value measured by the sensor, and the display unit 2 is positioned at the front side of the shell and displays the measurement result calculated by the singlechip 1.
The housing comprises a front cover 6, a support 7 and a rear cover 8. The front cover 6 and the rear cover 8 are detachably mounted on the front side and the rear side of the stand 7, respectively. The singlechip 1 is positioned between the support 7 and the front cover 6. The display unit 2 is located on the inner side wall of the front cover 6, and an observation window is arranged on the front cover 6 at a position corresponding to the display screen of the display unit 2.
A rotation shaft 9 is rotatably provided at the front end of the support 7 at a position corresponding to between the front cover 6 and the rear cover 8, and the rotation shaft 9 penetrates the support 7. The inside bell mouth that is equipped with in pivot 9 both ends, protecgulum 6 with back lid 8 corresponds the position department at pivot 9 both ends is equipped with respectively and passes through the bell mouth is jacked pivot 9's screw 11, thereby realizes pivot 9 rotatable installation. One end of the dynamic measurement arm 4 is detachably mounted on the rotating shaft 9 through transition fit and corresponds to a position between the support 7 and the rear cover 8, and the other end of the dynamic measurement arm extends to the outer side of the front cover 6 or the support 7 or the front end of the rear cover 8. One end of the measuring arm 3 is fixed on the support 7 at a position corresponding to one side of the rotating shaft 9, and the other end extends to the outer side of the front end of the front cover 6 or the support 7 or the rear cover 8. One end of the rotating handle 5 is fixedly connected to the rotating shaft 9 at a position corresponding to the position between the support 7 and the front cover 6, and the other end of the rotating handle passes through the side wall of the support 7 and then extends to the outside of one side of the front cover 6 or the support 7 or the rear cover 8. The side wall of the support 7 is provided with a bar-shaped hole corresponding to the position of the rotating handle 5 for the rotating handle 5 to swing so as to drive the dynamic measuring arm 4 to rotate, and the support 7 is provided with a limiting pin 10 corresponding to the position of the bar-shaped hole for controlling the swing amplitude of the rotating handle 5.
The sensor comprises a transmitting plate 12, a spacer 13 and a receiving plate 14. The transmitting plate 12 and the receiving plate 14 are fixed on one side of the support 7 close to the front cover 6 at intervals, the spacer 13 is rotatably arranged between the transmitting plate 12 and the receiving plate 14, and the spacer 13 is connected with the rotating shaft 9 at a position corresponding to the position between the support 7 and the rotating handle 5 in a linkage way through a connecting piece. The transmitting plate 12, the spacer 13 and the receiving plate 14 are all fan-shaped structures taking the rotating shaft 9 as the center of a circle. The transmitting plate 12 transmits eight paths of periodic square wave signals with the same frequency, the same amplitude and different phases, a part of the square wave signals are transmitted through the separation plate 13 and then are transmitted to the receiving plate 14, capacitance is formed between the transmitting plate 12 and the receiving plate 14, the formed capacitance signals are returned to the chip for processing through receiving poles on the receiving plate 14, the separation plate 13 rotates to cause the change of the phases of the capacitance signals of the receiving poles, the displacement of the separation plate 13 can be calculated by analyzing the phase relation of the capacitance signals, and then the displacement change quantity is converted into an angle change quantity by utilizing the correlation characteristic of a circle. Because the spacer 13 is in linkage connection with the rotating shaft 9, the spacer 13 rotates synchronously when the movable measuring arm 4 rotates, the spacer 13 rotates relatively to the transmitting plate 12 and the receiving plate 14 to form an electric signal after rotating to obtain the rotating angle of the movable measuring arm 4, and the rotating angle of the movable measuring arm 4 is sent to the singlechip 1 for calculation to obtain a measuring result, namely the measured dimension.
The calliper further comprises a force control mechanism for ensuring that the fixed measuring head of the fixed measuring arm 3 and the movable measuring head of the movable measuring arm 4 have the same measuring force when measuring objects of the same size. The force control mechanism is arranged on the rotating shaft 9 and the support 7. The force control mechanism comprises a torque arm 15, a pull rod 16 and a spring 17. One end of the torque arm 15 is fixed on the rotating shaft 9 at a position corresponding to the position between the dynamic measurement arm 4 and the partition plate. The two pull rods 16 are arranged oppositely, one pull rod 16 is positioned at one end of the torque arm 15 far away from the rotating shaft 9, and the other pull rod 16 is positioned at the corresponding position of the support 7. The two ends of the spring 17 are respectively connected to the two pull rods 16 to generate the same deformation when the movable measuring arm 4 rotates by the same angle each time, so that the fixed measuring head of the fixed measuring arm 3 and the movable measuring head of the movable measuring arm 4 are ensured to have the same measuring force when measuring the same size. Since the magnitude of the measuring force directly affects the rotation angle of the movable measuring arm 4, if the same size is measured, the difference in the magnitude of the measuring force may cause the rotation angle of the movable measuring arm 4 to be different, so that an error occurs in the measurement result. By arranging the force control mechanism, the deformation of the spring 17 is the same when the same size is measured, and the formed elastic force, namely the measuring force, is the same, so that the consistency of the measuring force is ensured, and the measuring accuracy is improved.
One of the technical problems to be solved by the invention is that the fixed measuring arm 3 and the movable measuring arm 4 can be replaced by a user, and the measuring accuracy of the caliper gauge can be directly affected due to the length R value error of the two measuring arms of the caliper gauge, so that the invention also provides the following design for solving the problems: the support 7 is provided with a positioning column 18 for ensuring the consistency of the length R of the fixed measuring arm 3 and the movable measuring arm 4 by positioning the position of the fixed measuring arm 3, the positioning column 18 is of a protruding structure on the support 7, and one end of the fixed measuring arm 3 mounted on the support 7 is provided with a mounting hole corresponding to the positioning column 18 at the position corresponding to the positioning column 18. When in machining, the fixed measuring arm 3 and the movable measuring arm 4 are ensured to have the same measuring length, namely R value, and the movable measuring arm 4 is arranged on the rotating shaft 9, so that the fixed measuring arm 3 is required to have a positioning function to ensure the R value of the fixed measuring arm 3 and the R value of the movable measuring arm 4 to be consistent, and the fixed measuring arm 3 is arranged at a position determined under the positioning function of the positioning column 18, so that the R value consistency of the fixed measuring arm 3 and the movable measuring arm 4 after the fixed measuring arm 3 is arranged can be ensured. The fixed measuring arm 3 is mounted on a positioning column 18 of the support 7, and the distance between the positioning column 18 and a fixed measuring head of the fixed measuring arm 3 is equal to the R value. The advantages of the above design are: the assembly difficulty of the measuring arm is reduced, and the consistency of the R value of the fixed measuring arm 3 and the R value of the movable measuring arm 4 is ensured, so that the measuring arm can be conveniently replaced by a user without affecting the precision.
The caliper body is arranged at the measurement length L 1 The included angle formed by the movable measuring arm 4 relative to the fixed measuring arm 3 is alpha. The length of the fixed measuring arm 3 and the length of the movable measuring arm 4 are both R. The singlechip 1 also has the following functions:
the single chip microcomputer 1 is further configured to calibrate the length R and the included angle α to adjust the measurement range of the caliper body after the lengths R of the fixed measurement arm 3 and the movable measurement arm 4 are independently adjusted.
Or, the single chip microcomputer 1 is further configured to calibrate the length R and the included angle α to adjust the measurement range of the caliper body after independently adjusting the position of the movable measurement arm 4 relative to the fixed measurement arm 3.
Or, the single chip microcomputer 1 is further configured to calibrate the length R and the included angle α to adjust the measurement range of the caliper body after adjusting the lengths R of the fixed measurement arm 3 and the movable measurement arm 4 and the positions of the movable measurement arm 4 relative to the fixed measurement arm 3.
As shown in fig. 6, the singlechip 1 calibrates the length R and the measured length L of the fixed measuring arm 3 and the movable measuring arm 4 according to the following method 1 The included angle alpha formed by the movable measuring arm 4 relative to the fixed measuring arm 3:
step one, measuring length L 1 And L 2 Is a standard block of (2): when the measurement length is L 1 The sensor outputs the angle alpha of the position of the movable measuring arm 4 relative to the absolute zero position of the sensor 1 Giving the singlechip 1; when the measurement length is L 2 The sensor outputs the angle alpha of the position of the movable measuring arm 4 relative to the absolute zero position of the sensor 2 For the single chip microcomputer 1, the single chip microcomputer 1 calculates the length R and the measurement length L of the fixed measurement arm 3 and the movable measurement arm 4 according to a trigonometric function and through the following formula 1 The included angle alpha formed by the movable measuring arm 4 relative to the fixed measuring arm 3:
and step two, the singlechip 1 stores the calculated length R and the included angle alpha to finish calibration.
As shown in fig. 7, when the caliper body measures the L size of the measured object 19, the single-chip microcomputer 1 calibrates the length R and the included angle α, and then measures L according to the position a of the movable measuring arm 4 output by the sensor when measuring L 1 And when the movable measuring arm 4 is positioned at the position B, obtaining the rotation angle theta of the position A relative to the position B, and finally calculating a measuring result L through the following formula:
in the invention, the length R of the fixed measuring arm 3 and the movable measuring arm 4 is adjusted by replacing the fixed measuring arm 3 and the movable measuring arm 4. When the measuring arm is fixed, the position of the movable measuring arm 4 relative to the fixed measuring arm 3 (the angle between the fixed measuring arm 3 and the movable measuring arm 4 when not measured), that is, the size of the included angle formed by the fixed measuring arm 3 and the movable measuring arm 4 determines the measuring range of the caliper gauge, and as for adjusting the relative position of the movable measuring arm 4 relative to the fixed measuring arm 3, the following method is implemented: the rear cover 8 is detached from the support 7, exposing the connection of the movable measuring arm 4 with the spindle 9. Since the movable measuring arm 4 is detachably mounted on the rotating shaft 9 by means of a transition fit, the transition fit may have a clearance or interference fit, and the tolerance zone of the hole (the mounting hole at the end of the movable measuring arm 4) and the tolerance zone of the shaft (the rotating shaft 9) overlap each other, that is, the movable measuring arm 4 may be mounted on the rotating shaft 9 or detached from the rotating shaft 9 at any time. Therefore, the movable measuring arm 4 is detached from the rotating shaft 9, then the position of the movable measuring arm 4 relative to the fixed measuring arm 3, that is, the included angle formed by the movable measuring arm 4 and the fixed measuring arm 3 is adjusted until the included angle formed by the movable measuring arm 4 and the fixed measuring arm 3 is matched with the required measuring range, and then the movable measuring arm 4 is assembled to the corresponding position of the rotating shaft 9 by changing the posture of the movable measuring arm 4 relative to the rotating shaft 9 after the included angle is changed, so that the position of the movable measuring arm 4 relative to the fixed measuring arm 3 is changed. Whether the fixed measuring arm 3 and the movable measuring arm 4 are replaced to adjust the length R of the fixed measuring arm 3 and the movable measuring arm 4, or the position of the movable measuring arm 4 relative to the fixed measuring arm 3 is adjusted, the measurement can be performed only after the calibration operation is performed by selecting a proper standard gauge block, the length R of the fixed measuring arm 3 and the movable measuring arm 4 and the position of the movable measuring arm 4 relative to the fixed measuring arm 3 can be adjusted through the calibrated caliper gauge, the adjustable caliper gauge measuring range is realized, the application range of the caliper gauge is enlarged, and the measuring precision is also improved.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (9)
1. The digital display caliper with an adjustable measuring range comprises a caliper body, a sensor and a singlechip (1);
the caliper body comprises a fixed measuring arm (3) and a movable measuring arm (4) which rotates relative to the fixed measuring arm (3) to measure; the sensor is an absolute sensor and is used for generating corresponding electric signals after the movable measuring arm (4) rotates relative to the fixed measuring arm (3) and measuring the rotating angle of the movable measuring arm (4); the singlechip (1) is used for calculating a measurement result according to the angle value measured by the sensor; characterized in that, in the measurement length L 1 An included angle formed by the movable measuring arm (4) relative to the fixed measuring arm (3) is alpha; the lengths of the fixed measuring arm (3) and the movable measuring arm (4) are R;
the singlechip (1) is also used for calibrating the length R and the included angle alpha to adjust the measuring range of the caliper body after independently adjusting the lengths R of the fixed measuring arm (3) and the movable measuring arm (4);
or, the singlechip (1) is further used for calibrating the length R and the included angle alpha to adjust the measuring range of the caliper body after independently adjusting the position of the movable measuring arm (4) relative to the fixed measuring arm (3);
or, the singlechip (1) is further used for calibrating the length R and the included angle alpha to adjust the measuring range of the caliper body after simultaneously adjusting the lengths R of the fixed measuring arm (3) and the movable measuring arm (4) and the positions of the movable measuring arm (4) relative to the fixed measuring arm (3);
the singlechip (1) calibrates the length R and the included angle alpha according to the following method:
step one, the measuring lengths of the calliper body are L respectively 1 And L 2 Standard quantity of (2)And (3) block: when the measurement length is L 1 The sensor outputs the angle alpha of the position of the movable measuring arm (4) relative to the absolute zero position of the sensor 1 Giving the singlechip (1); when the measurement length is L 2 The sensor outputs the angle alpha of the position of the movable measuring arm (4) relative to the absolute zero position of the sensor 2 For the singlechip (1), the singlechip (1) calculates the length R and the included angle alpha according to a trigonometric function and through the following formula:
and step two, the singlechip (1) stores the calculated length R and the included angle alpha to finish calibration.
2. The digital display calliper with adjustable measuring range according to claim 1, wherein the single chip microcomputer (1) is used for measuring L according to the position A of the movable measuring arm (4) output by the sensor when measuring L after calibrating the length R and the included angle alpha 1 And when the movable measuring arm (4) is positioned at the position B, obtaining the rotation angle theta of the position A relative to the position B, and finally calculating a measuring result L according to the following formula:
3. the digital display calliper with adjustable measuring range according to any of claims 1 to 2, wherein the calliper body further comprises a housing, a display unit (2) and a turning handle (5); one end of the fixed measuring arm (3) is fixed in the shell, and the other end of the fixed measuring arm extends out of the shell to form a fixed measuring head; one end of the dynamic measurement arm (4) is rotatably arranged in the shell, and the other end of the dynamic measurement arm extends out of the shell to form a dynamic measurement head; one end of the rotating handle (5) is positioned in the shell and is in linkage connection with the movable measuring arm (4), and the other end of the rotating handle extends out of the shell to form an operating end for manually driving the movable measuring arm (4) to rotate relative to the fixed measuring arm (3); the sensor is positioned in the shell, corresponding electric signals are generated after the movable measuring arm (4) rotates, the rotating angle of the movable measuring arm (4) is measured, the singlechip (1) is positioned in the shell, the measuring result is calculated according to the angle value measured by the sensor, and the display unit (2) is positioned at the front side of the shell and displays the measuring result calculated by the singlechip (1).
4. A digital display calliper with adjustable measuring range according to claim 3, wherein the housing comprises a front cover (6), a support (7) and a rear cover (8); the front cover (6) and the rear cover (8) are respectively detachably arranged on the front side and the rear side of the support (7); the singlechip (1) is positioned between the support (7) and the front cover (6); the display unit (2) is positioned on the inner side wall of the front cover (6), and an observation window is arranged on the front cover (6) at a position corresponding to the display screen of the display unit (2);
a rotating shaft (9) is rotatably arranged at the front end of the support (7) corresponding to the position between the front cover (6) and the rear cover (8), and the support (7) is penetrated by the rotating shaft (9); one end of the dynamic measurement arm (4) is detachably arranged on the rotating shaft (9) at a position corresponding to the position between the support (7) and the rear cover (8) through transition fit, and the other end of the dynamic measurement arm extends to the outer side of the front cover (6) or the front end of the support (7) or the rear cover (8); one end of the fixed measuring arm (3) is fixed at a position corresponding to one side of the rotating shaft (9) on the support (7), and the other end of the fixed measuring arm extends to the outer side of the front end of the front cover (6) or the support (7) or the rear cover (8); one end of the rotating handle (5) is fixedly connected to the rotating shaft (9) at a position corresponding to the position between the support (7) and the front cover (6), and the other end of the rotating handle penetrates through the side wall of the support (7) and then extends to the outside of one side of the front cover (6) or the support (7) or the rear cover (8); the side wall of the support (7) is provided with a bar-shaped hole corresponding to the rotating handle (5) for the rotating handle (5) to swing so as to drive the movable measuring arm (4) to rotate, and the support (7) is provided with a limiting pin (10) corresponding to the bar-shaped hole for controlling the swing amplitude of the rotating handle (5).
5. The digital caliper according to claim 4, wherein conical holes are formed in two ends of the rotating shaft (9), and screws (11) for pushing the rotating shaft (9) through the conical holes are respectively arranged at positions of the front cover (6) and the rear cover (8) corresponding to the two ends of the rotating shaft (9).
6. The digital display calliper with adjustable measuring range according to claim 4, wherein the sensor comprises a transmitting plate (12), a spacer (13) and a receiving plate (14); the transmitting plate (12), the spacer (13) and the receiving plate (14) are all fan-shaped structures taking the rotating shaft (9) as a circle center; the transmitting plate (12) and the receiving plate (14) are mutually spaced and fixed on one side, close to the front cover (6), of the support (7), the spacer (13) is rotatably arranged between the transmitting plate (12) and the receiving plate (14), and the spacer (13) is connected with the position, corresponding to the position between the support (7) and the rotating handle (5), on the rotating shaft (9) through a connecting piece in a linkage mode.
7. The digital caliper gauge with adjustable measuring range according to claim 5, further comprising a force control mechanism for ensuring that the fixed measuring head of the fixed measuring arm (3) and the movable measuring head of the movable measuring arm (4) have the same measuring force when measuring objects of the same size; the force control mechanism is positioned on the rotating shaft (9) and the support (7).
8. The digital caliper gauge with adjustable measuring range according to claim 7, wherein the force control mechanism comprises a torque arm (15), a pull rod (16) and a spring (17); one end of the torque arm (15) is fixed on the rotating shaft (9) at a position corresponding to the position between the dynamic measurement arm (4) and the partition plate; the two pull rods (16) are oppositely arranged, one pull rod (16) is positioned at one end of the torque arm (15) far away from the rotating shaft (9), and the other pull rod (16) is positioned at the corresponding position of the support (7); the two ends of the spring (17) are respectively connected to the two pull rods (16) so as to generate the same deformation when the movable measuring arm (4) rotates for the same angle each time, thereby ensuring that the fixed measuring head of the fixed measuring arm (3) and the movable measuring head of the movable measuring arm (4) have the same measuring force when measuring the same size.
9. The digital caliper with adjustable measuring range according to claim 4, wherein the support (7) is provided with a positioning column (18) for ensuring the length R of the fixed measuring arm (3) is consistent with the length R of the movable measuring arm (4) by positioning the position of the fixed measuring arm (3), the positioning column (18) is a protruding structure on the support (7), one end of the fixed measuring arm (3) is mounted on the support (7), and a mounting hole corresponding to the positioning column (18) is formed at a position corresponding to the positioning column (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810790122.3A CN108627063B (en) | 2018-07-18 | 2018-07-18 | Digital display caliper with adjustable measuring range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810790122.3A CN108627063B (en) | 2018-07-18 | 2018-07-18 | Digital display caliper with adjustable measuring range |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108627063A CN108627063A (en) | 2018-10-09 |
| CN108627063B true CN108627063B (en) | 2024-01-26 |
Family
ID=63689000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810790122.3A Active CN108627063B (en) | 2018-07-18 | 2018-07-18 | Digital display caliper with adjustable measuring range |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108627063B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB567207A (en) * | 1943-04-19 | 1945-02-02 | William James Evans | An improved gauge |
| CN2308071Y (en) * | 1997-02-18 | 1999-02-17 | 林强兴 | Multipurpose electronic digital display calliper gauge |
| CN2421613Y (en) * | 2000-05-17 | 2001-02-28 | 青海量具刃具有限责任公司 | Digital display internal and external calliper gauge |
| CN201522255U (en) * | 2009-10-23 | 2010-07-07 | 东莞市特马电子有限公司 | Digital display caliper |
| CN202442663U (en) * | 2012-02-22 | 2012-09-19 | 桂林市晶瑞传感技术有限公司 | Digital display angle snap gauge |
| CN103017625A (en) * | 2012-12-14 | 2013-04-03 | 北京动力机械研究所 | Super-long depth external caliper gauge |
| CN103542783A (en) * | 2013-10-18 | 2014-01-29 | 北京动力机械研究所 | Dial snap gauge |
| CN205655756U (en) * | 2016-05-30 | 2016-10-19 | 中国大唐集团科学技术研究院有限公司华中分公司 | Digital display caliber |
| CN108007306A (en) * | 2017-11-17 | 2018-05-08 | 共享铸钢有限公司 | A kind of survey tool for being used to measure steel-casting irregular holes class formation inside dimension |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110138645A1 (en) * | 2009-12-15 | 2011-06-16 | Yanchen Zhang | Digital diameter gauge with rotary motion sensor and method for use |
-
2018
- 2018-07-18 CN CN201810790122.3A patent/CN108627063B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB567207A (en) * | 1943-04-19 | 1945-02-02 | William James Evans | An improved gauge |
| CN2308071Y (en) * | 1997-02-18 | 1999-02-17 | 林强兴 | Multipurpose electronic digital display calliper gauge |
| CN2421613Y (en) * | 2000-05-17 | 2001-02-28 | 青海量具刃具有限责任公司 | Digital display internal and external calliper gauge |
| CN201522255U (en) * | 2009-10-23 | 2010-07-07 | 东莞市特马电子有限公司 | Digital display caliper |
| CN202442663U (en) * | 2012-02-22 | 2012-09-19 | 桂林市晶瑞传感技术有限公司 | Digital display angle snap gauge |
| CN103017625A (en) * | 2012-12-14 | 2013-04-03 | 北京动力机械研究所 | Super-long depth external caliper gauge |
| CN103542783A (en) * | 2013-10-18 | 2014-01-29 | 北京动力机械研究所 | Dial snap gauge |
| CN205655756U (en) * | 2016-05-30 | 2016-10-19 | 中国大唐集团科学技术研究院有限公司华中分公司 | Digital display caliber |
| CN108007306A (en) * | 2017-11-17 | 2018-05-08 | 共享铸钢有限公司 | A kind of survey tool for being used to measure steel-casting irregular holes class formation inside dimension |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108627063A (en) | 2018-10-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7546689B2 (en) | Joint for coordinate measurement device | |
| JP7363006B2 (en) | Calibration value generation method for calibration target encoder and calibration value generation system for calibration target encoder | |
| JPH11108602A (en) | Out-of-roundness measuring instrument | |
| CN108955480A (en) | A kind of radius measuring device and radius measurement method | |
| CN108627063B (en) | Digital display caliper with adjustable measuring range | |
| CN208588285U (en) | A kind of adjustable digital display calliper gauge of measurement range | |
| CN113324514B (en) | Rotating shaft debugging method and debugging assembly | |
| US7373844B1 (en) | Switch feel measurement apparatus | |
| US7124642B2 (en) | Dual gauge with dual calibration system and method | |
| CN110026330B (en) | Piston sounding device, probe calibration device and method for calibrating probe | |
| US5571965A (en) | Wheel balancer parameter entry device | |
| JP2021071376A (en) | Test indicator | |
| CN211373528U (en) | Adjustable laser profile sensor | |
| CN210981108U (en) | Internal spline tooth top circle diameter inspection fixture | |
| CN108132265A (en) | A kind of small diameter tube X-ray radiography elliptic projection locator | |
| CN110006312B (en) | Method for measuring and comparing object with high precision size by coarse and fine adjustment mode | |
| JP3096727B2 (en) | Caliper and rotating arm | |
| CN108152307A (en) | Small diameter tube X-ray radiography elliptic projection locator with adjusting knob | |
| CN110207779A (en) | External clamping sensor parameters installation method | |
| US3046931A (en) | Adjustable graduations for instrument dial | |
| CN216115696U (en) | Dial indicator with inclination angle measurement function | |
| US2517667A (en) | Device for measuring taper | |
| CN219573357U (en) | Tension meter calibrating device | |
| CN217879607U (en) | Measuring device for direction finding precision of ultrashort wave direction finder | |
| CN213970061U (en) | Clamp for machining center with accurate clamping function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |