CN105066939B - Ball center distance detection device - Google Patents

Abstract

The present invention provides a ball center distance detection device and a detection method thereof, comprising: a base body, including: a guide rail and two brackets respectively fixed at both ends of the guide rail; a fixed support part, fixed on the guide rail for supporting the ball; two The mobile support parts are respectively arranged on both sides of the fixed support part, and each mobile support part includes: a sphere-side support unit movably installed on the guide rail for supporting the sphere, and a movable support unit installed on the guide rail on the fixed support part and the ball-side support unit for supporting the club; the two measuring parts correspond to the two ball-side support units and are installed on the two brackets, and are measured based on predetermined measurement rules. a first distance moved by one of the sphere-side support units and a second distance moved by the other sphere-side support unit; and a calculation unit, which calculates the distance between centers of spheres according to the first distance and the second distance.

Description

Ball center distance detection device

technical field

The invention relates to a ball center distance detection device capable of accurately detecting the ball center distance of a bat.

Background technique

The three-coordinate measuring instrument is used in the field of measurement. It can measure the size, angle and spatial position of the contour and surface of the product, and can effectively measure products with curved surfaces. The three-coordinate measuring instrument has an irreplaceable role in the field of measurement. .

The measurement accuracy of the three-coordinate measuring instrument is often checked with a ball stick. The bat consists of balls arranged at both ends and a club connecting the two balls. First, fit the center of the ball by measuring multiple points on the sphere, then measure the distance between the two spheres, and finally get the center distance of the bat, according to the measured center distance and the known center distance of the bat By comparison, the accuracy of the three-coordinate measuring instrument can be reliably verified. Therefore, the known center distance of the bat plays a critical role in the accuracy of the CMM.

The value of the known ball center distance of the above-mentioned bat can be detected by direct calibration method of laser interferometer. In the laser interferometer direct calibration method, three supports are used to support the ball of the bat, the middle support is fixed and the other two are movable. Place the two spheres of the bat on any two of the three support bases by moving the movable supports in sequence, and then measure the two moving distances of the moving support bases to obtain the ball of the bat heart distance.

However, in the above measurement process, when the two spheres of the bat are placed on any two supporting seats, the club will be deformed due to the action of the club's own gravity, which will seriously affect the measurement of the ball center distance. Accuracy, thus affecting the calibration results of the three-coordinate measuring instrument.

Contents of the invention

The present invention was made to solve the above-mentioned problems, and an object of the present invention is to provide a ball center distance detection device and a detection method thereof which can accurately detect the center distance of a bat at low cost and with a simple structure.

The invention provides a center distance detection device of a baseball bat, which is used for detecting the center distance of a bat. The bat includes two spheres and a club connecting the two spheres. It is characterized in that it includes: a base body, including: The guide rail and two brackets respectively fixed at both ends of the guide rail; the fixed support part is fixed on the guide rail to support the sphere; two mobile support parts are respectively arranged on both sides of the fixed support part, and each mobile support part includes: A ball side support unit installed on the guide rail for supporting the ball, and a club side support unit movably installed on the guide rail between the fixed support part and the ball side support unit for supporting the club; two measuring parts , corresponding to the two sphere-side support units and installed on the two brackets, and based on predetermined measurement rules, respectively measure the first distance that one sphere-side support unit moves and the second distance that the other sphere-side support unit moves ; and a calculation unit, which calculates the center-to-center distance according to the first distance and the second distance.

In the ball center distance detection device provided by the present invention, it can also have such a feature: wherein, the predetermined measurement rule is: by moving the two moving support parts in sequence, two balls are placed on the two ball side support units and the fixed support On any two of the parts, measure the moving distance of one of the sphere-side support units as the first distance, and measure the moving distance of the other sphere-side support unit as the second distance.

In the bat center distance detection device provided by the present invention, it may also have such a feature: wherein, the bat side support unit includes at least one bat side support assembly, and the bat side support assembly includes: a V for supporting the club The type frame, the adjustment member for adjusting the position of the V-type frame, and the flexible piece for flexibly connecting the V-type frame and the adjustment member.

In the baseball heart distance detection device provided by the present invention, it also has such a feature, and also includes: a correction part, including: a first inductive micrometer arranged on a sphere and a first electric micrometer arranged on a ball corresponding to the side support assembly of the bat at least one second inductance micrometer on the club, wherein the adjustment member adjusts the position of the V-shaped frame according to the indication values of the first inductance micrometer and the second inductance micrometer, so that the V-shaped frame and the club are aligned When in contact and the fixed support portion or the sphere-side support unit is in contact with the sphere.

In the baseball center distance detection device provided by the present invention, it may also have such a feature: wherein, there are two bat side support assemblies. The number of the second electric micrometers is two, and they are in one-to-one correspondence with the bat side support components.

In the baseball center distance detection device provided by the present invention, it may also have such a feature: wherein, the adjustment member includes: a first slide rail arranged parallel to the guide rail, a first slide block engaged on the first slide rail , the second slide rail arranged on the first slide block and perpendicular to the slide rail, the second slide block engaged on the second slide rail, set on the second slide block and connected with the first slide rail and the second slide rail The third slide rail is perpendicular to the plane where the second slide rail is located, and the third slide block is engaged on the third slide rail for installing the flexible member.

In the ball center distance detection device provided by the present invention, it may also have such a feature, and further include: wherein, the measuring part includes: a transmitting unit for emitting a light beam, and a ball side support installed on the ball center corresponding to the ball center; A reflective mirror on the unit for reflecting light beams, and a processing unit for obtaining the distance between the transmitting unit and the reflective mirror according to the reflected light beams.

In addition, the present invention also provides a method for detecting the center distance of a baseball bat using the aforementioned device for detecting center distance of a baseball bat. On the side support unit, another sphere is placed on the fixed support part, and the bat side support unit supports the club; step 2, one of the sphere side support units is moved to place the other sphere on the other sphere side support unit 1, the bat side support unit supports the club, and the measurement part measures the moving distance of one of the ball side support units as the first distance; step 3, moves the other ball side support unit to place the other ball on the fixed support part In the first step, the club-side support unit supports the club, and then, the measuring part measures the moving distance of the other ball-side support unit as the second distance; step 4, the calculation part calculates the ball center distance according to the first distance and the second distance.

Function and Effect of Invention

According to the ball center distance detection device and detection method of the present invention, since the fixed support part is fixed on the guide rail to support the ball, the ball-side support unit can move on the guide rail and be used to support the ball, and the bat-side support unit can also be used to support the ball. Move on the guide rail and support the club so as to realize the auxiliary support for the club. The measurement part is installed on the bracket, and based on the predetermined measurement rules, the first distance and the second distance that the two ball side support units move respectively are measured. The calculation part according to the first distance The first distance and the second distance calculate the ball center distance of the bat, therefore, the ball center distance detection device of the present invention and its detection method can realize the measurement of the ball center distance of the bat, which solves the problem of the long ball when measuring the long bat. The deformation caused by the rod's own gravity affects the measurement accuracy, which makes the measurement more accurate and the cost is low and the structure is simple.

Description of drawings

Fig. 1 is a schematic structural view of a baseball center distance detection device in an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a correction unit in an embodiment of the present invention;

Fig. 3 is the schematic diagram of the process of the ball center distance detecting device in the embodiment of the present invention; and

Fig. 4 is a working flow chart of the detection method of the baseball heart distance detection device in the embodiment of the present invention.

detailed description

In order to make the technical means, creative features, goals and effects of the present invention easy to understand, the following embodiments will specifically illustrate the ball center distance detection device and its detection method of the present invention in conjunction with the accompanying drawings.

Fig. 1 is a structural schematic diagram of a detection device for the center distance of a ball and baseball in an embodiment of the present invention.

As shown in Fig. 1, in this embodiment, the ball center distance detection device 100 performs non-contact measurement of the ball center distance of the bat 200 as a standard, and in this embodiment, it can measure the distance between 300mm and 1000mm. The bat is tested. The bat 200 includes: two balls 201 and a club 202 , the club 202 connects the two balls 201 . In this embodiment, a 300mm bat purchased from Germany is used as the bat. The values given by the German DAkks calibration certificate are 300.5063mm, and the given uncertainties are U=1.1 μm and k=2.

The baseball center distance detection device 100 includes: a base 10, a fixed support part 20, two movable support parts 30, two measurement parts 40, a calculation part (not shown in the figure) and a correction part (not shown in the figure).

The base body 10 includes: a guide rail 11 and two brackets 12 .

The base of the guide rail 11 is made of stable granite. A protective plate is installed on the outside of the guide rail 11, and drag chains, air pipes, wires and other accessories are placed inside the protective plate, and a cavity for placing a linear motor and a grating scale is also provided, so that it can be improved into an automatic measurement system later. The design dimensions of the guide rail 11 are: length X width X height 2800mm X 170mm X 400mm, and the whole straightness of the guide rail 11 is better than 2 μm. In this embodiment, the guide rail 11 adopts an air-floating planar rail structure. Because the gas bearing has high precision, low friction, and can work in an extreme working environment, it is a kind of air-floating workbench scheme to be used in the design of the precision motion platform. An ideal choice. The guide rail 11 is designed with aerostatic pressure. The air static pressure guide rail is to send the air with a certain pressure into the gap of the guide rail through the restrictor, and use its static pressure to suspend the guide rail, so that an extremely thin air film is formed between the guide rail surfaces, and the thickness of the air film is basically kept constant. Unchanged a pure air friction sliding guide.

Two brackets 12 are respectively fixedly installed at both ends of the guide rail 11 for supporting the measuring part 40 . In this embodiment, the brackets 12 are made of granite.

The fixed support part 20 is fixed at the middle position of the guide rail 11 for supporting the bat 200 . The fixed support part 20 includes: a fixed connecting block 21 , a fixed side ball seat 22 and an air adsorption fixed workbench 23 . The fixed connection block 21 is fixed on the air adsorption fixed workbench 23 , and the fixed side ball seat 22 is arranged on the fixed connection block 21 for supporting a ball 201 of the ball bat 200 .

The gas adsorption fixed workbench 23 is connected with the guide rail 11 in the form of gas adsorption, and when the gas pipe leads to the gap between the guide rails 11, the gas adsorption fixed workbench 23 can slide on the guide rail 11, thereby driving the fixed connection block 21 to move; stop supplying When the air is airy, the air adsorption fixed workbench 23 is just fixed on the guide rail 11.

The two movable supporting parts 30 are respectively provided on both sides of the fixed supporting part 20 , and the movable supporting part 30 includes: a ball-side supporting unit 31 and a bat-side supporting unit 32 .

Two sphere-side support units 31 are used to support the sphere 201 , respectively denoted as a first sphere-side support unit 31 a and a second sphere-side support unit 31 b. The first sphere side support unit 31a is arranged on one side of the fixed support part 20, and the second sphere side support unit 31b is arranged on the other side of the fixed support part 20. Viewed from the direction shown in FIG. 1, the first sphere side supports The unit 31 a is located on the left side of the fixed support part 20 , and the second ball-side support unit 31 b is located on the right side of the fixed support part 20 .

Hereinafter, the first spherical side supporting unit 31a is taken as an example to describe the spherical side supporting unit.

The first sphere-side supporting unit 31 a is movable on the guide rail 11 . The first sphere-side supporting units 31 a all include: an air-floating sliding workbench 311 , a moving connection block 312 , and a moving-side ball seat 313 . The air-floating sliding table 311 is movably installed on the guide rail 11, the mobile connecting block 312 is fixedly installed on the air-floating sliding table 311, and the moving side ball seat 313 is arranged on the moving connecting block 312 to correspond to the center of the sphere 201. The corresponding positions are used to support the sphere 201 . In this embodiment, the air-floating sliding workbench 311 is provided with a fine-tuning mechanism, so that the first ball-side support unit 31a reaches a specific position according to the theoretical value of the center distance of the bat 200, and then fine-tunes through the fine-tuning mechanism, so that the ball The two spherical bodies 201 of the stick 200 are in full contact with the ball seat 311 on the moving side. In this embodiment, in order to improve the repeatability of contact between the ball and the ball seat, a magnet piece is fixed in the ball seat to give the steel ball a fixed adsorption force, which is beneficial to improve the repeatability of placing the bat. During the experiment, it was found that when the adsorption force of the magnet sheet is too large, it is easy to cause collision between the steel ball and the ball seat during the measurement process, and there will be a measurement deviation of several microns. Therefore, use the method of heating to weaken the magnetism of the magnet in the ball seat to an appropriate level, so as to ensure the measurement accuracy.

The bat-side support unit 32 is movably installed on the guide rail 11 and disposed between the fixed support portion 20 and the ball-side support unit 31 for supporting the club 202 so as to provide auxiliary support for the club 200 . One of the two bat-side support units 32 is located between the first ball-side support unit 31 a and the fixed support portion 20 , and the other is located between the second ball-side support unit 31 b and the fixed support portion 20 .

The bat side support unit 32 includes two bat side support assemblies 321 . The bat side support assembly 321 includes: a V-shaped frame 321a, a flexible member (not shown in the figure) and an adjustment member 321b. The V-shaped frame 321a is used to support the club 202, and the supporting position is selected at the Bezier point, that is, the two V-shaped frames 321a of the club side support unit 32 are placed at a position 0.2203L away from both ends of the club 200 ( L is the length of the bat). One end of the flexible piece is connected to the V-shaped frame 321a, and the other end is installed on the adjusting member 321b. In this embodiment, the flexible piece adopts a spring so that the V-shaped frame does not affect the support of the ball by the ball-side support unit when supporting the club. .

The adjusting member 321b is connected to the guide rail 11 for adjusting the position of the V-shaped frame 321a. The adjustment member 321b includes: a first slide rail X, a first slide block (not shown in the figure), a second slide rail Y, a second slide block (not shown in the figure), a third slide rail Z and a third slide block ( not shown in the figure).

The first slide rail X is arranged on the side wall of the guide rail 11 and is parallel to the track of the guide rail 11 , and is used for adjusting the position of the V-shaped frame 321a in the X-axis direction. The first slider is engaged on the first slide rail X and can slide along the first slide rail X.

The second slide rail Y is connected with the first slide block and is perpendicular to the first slide rail X, so that the second slide rail Y can move along the direction of the first slide rail X. The second slider is engaged on the second slide rail Y, and can move on the second slide rail Y and in the Y-axis direction perpendicular to the first slide rail X, that is, viewed from the direction shown in FIG. 1 , The Y-axis direction is a direction parallel to the plane where the guide rail 11 is located. In this embodiment, the second sliding rail Y and the second sliding block use a Y-direction adjustment platform to realize the above functions.

The third slide rail Z is connected with the second slide block, and is perpendicular to the first slide rail X and the second slide rail Y, and the third slide block is engaged with the third slide rail Z for connecting with the flexible member, so that The V-shaped frame 321a can move along the third slide rail Z in the Z-axis direction (vertical direction) perpendicular to the X-axis and the Y-axis. In this embodiment, the third sliding rail Z and the third sliding block use a Z-direction precision adjustment table to realize the above functions. The V-shaped frame 321 can move in the Z-axis direction through the third slide rail Z, move in the Y-axis direction through the second adjustment table Y, and move in the X-axis direction through the first slide rail X.

The two measuring parts 40 are installed on the two brackets 12 respectively, and the two measuring parts 40 are respectively the first measuring part 40a corresponding to the first sphere side support unit 31a and the second measuring part 40a corresponding to the second sphere side support unit 31b. Section 40b.

The first measurement unit 40a includes: a transmitting unit 41, a mirror 42, a receiving unit (not shown in the figure) and a processing unit (not shown in the figure). The emitting unit 41 is used to emit light beams toward the first sphere-side supporting unit 31a. Reflector 42 is fixed on the moving second slider 312 and at a position corresponding to the center of the sphere 201 on the ball seat 313 on the moving side. Reflector 42 reflects the light beam, and the receiving unit receives the reflected light beam. The reflected light beam results in the distance between emission unit 41 and mirror 42 . The second measuring part 40b is similar to the first measuring part 40a, and will not be repeated here. In this embodiment, the light sources of the two emission units 41 are obtained by splitting light with a laser interferometer, thereby realizing two-way interferometry, because the uncertainty component introduced by only one light source will improve the detection device to a certain extent. measurement accuracy. The receiving unit is realized by a fiber optic receiver.

The calculation unit calculates the center distance of the bat 200 based on the distance obtained by the processing unit.

Fig. 2 is a schematic structural diagram of a correction unit in an embodiment of the present invention.

As shown in Figure 2, in this embodiment, the correcting part 60 is used to correct the position of the bat side support unit 32, so that the V-shaped frame 321a plays a supporting role, and at the same time the ball 201 does not break away from the ball seat (the ball seat is Two moving side ball seats 313 and a fixed side ball seat 22).

The calibration unit 60 includes: a first inductance micrometer 61 and two second inductance micrometers 62 .

The first electric micrometer 61 is arranged on the ball 201, and the ball 201 has been placed on the ball seat. In this embodiment, the ball bat 200 is placed on the fixed support part 20 and the second ball side support unit 31b. An electrical micrometer 61 is placed above the first sphere-side supporting unit 31 a, and the measuring head is in contact with the top of the sphere 201 .

The two second electrical micrometers 62 correspond to the two bat side support assemblies 321 one by one, the second electrical micrometers 62 are placed above the V-shaped frame 321 a, and the probes are in contact with the club 202 .

The correction method of the correction part 60 to calibrate the V-shaped frame 321a is as follows:

Step 1, place two spheres 201 on the fixed support part 20 and the second sphere-side support unit 31b respectively.

Step 2, slide the two sliders of the bat side support unit 32 between the fixed support portion 20 and the second ball side support unit 31b to the positions of the Bezier points of the bat 200 respectively.

Step 3, respectively adjust the second slider so that the axis direction of the V-shaped frame 321a is parallel to the axis of the club 200, that is, the club 202 just completely falls into the V-shaped groove.

Step 4, fix the three inductance micrometers, contact the measuring head of the first inductance micrometer 61 with the ball top, and set the indicated value to zero. The other two second inductive micrometers 62 are respectively placed above the V-shaped frame 321 a, and the probes are in contact with the club 202 .

Step 5, adjust the third slide block in the upward direction along the z direction, drive the V-shaped frame to move in the vertical direction, and find the critical point where the indication value of the second inductance micrometer 62 changes, which represents the V-shaped frame 321a and The club 202 is in full contact.

Step 6, after finding the critical point, set the indication values of the two second electrical micrometers 62 to zero.

Step 7, continue to fine-tune the two third sliders upwards, and keep the indication values of the two second inductance micrometers 62 consistent at any time until the indication value of the first inductance micrometer 61 changes suddenly, which means that the sphere 201 has been connected with Tee disengaged.

Step 8, fine-tune the two third sliders, find the critical point at which the indication value of the first inductance micrometer 61 will change but not occur, and record the indication value a of the two inductance micrometers 62 .

Step 9. Adjust the two third sliders downward until the displayed value is a/2. At this time, it means that the auxiliary support effect of the two V-shaped frames has been achieved. The compensation for the deformation caused by gravity is realized when the ball bat 200 is measured.

Fig. 3 is a schematic diagram of the process of the detection device for the heart distance of the ball and baseball in the embodiment of the present invention.

As shown in Figure 3, in the field of metrology, the application of interferometric length measurement generally has only one interferometric distance measurement in one dimension. However, due to the particularity of the bat structure, it is necessary to have two interferometric signals in one dimension, and make the optical axes of the two optical paths coincide. The measurement process is:

1. Place the two balls 201 of the bat 200 on the moving side ball seat 313 of the first ball moving unit 31a and the fixed side ball seat 22 of the fixed support part 20 respectively, and initialize the interferometric signal of the first measuring part 40a as zero.

2. Move the first ball moving unit 31a so that the rightmost ball 201 of the bat 200 is placed on the moving side ball seat of the second ball moving unit 31b, record the displacement measured by the first measuring part 40a as a, and initialize the second ball at the same time The interferometer of the measurement part 40b is zero.

3. Move the second ball moving unit 31b to move the ball 201 at the left end of the bat to the ball seat 22 on the fixed side, and record the displacement measured by the second measuring part 40b as b.

4. Then the ball center distance of the bat is L=a+b.

Based on this measurement rule, the design and installation of the detection device must comply with Abbe's principle to ensure that the axis of the interferometric measurement coincides with the axis of the bat and the axis of the sliding table movement, thereby minimizing the cosine error. Because one measurement only needs to be completed at a few specific points on the guide rail, the long-stroke sliding of the worktable on the guide rail is avoided, and the influence of the straightness error of the guide rail can be minimized. This reduces the requirements on the straightness of the guide rail to a certain extent. Therefore, under the premise that the bat axis coincides with the measurement axis, the straightness of the guide rail meets 2 μm/m, and the cosine error introduced by the straightness error of the guide rail can be ignored in the process of uncertainty evaluation.

Fig. 4 is a working flow chart of the detection method of the baseball heart distance detection device in the embodiment of the present invention.

As shown in Figure 4, the specific steps of the baseball center distance detection method using the baseball center distance detection device 100 are as follows:

Step S1, turn off the air floatation switch of the air adsorption fixed workbench 23 to fix it at the middle position of the guide rail 11, and then enter into step S2.

Step S2, adjusting the measuring part 40 so that all the light beams emitted by the emitting unit 41 are irradiated on the reflecting mirror 42; then go to step S3.

Step S3, open the two air-floating switches of the air-floating sliding workbench 311 of the first ball side support unit 31a, slide the first ball side support unit 31a, and one of the balls of the bat 200 (the left ball in FIG. 1 ) Put it on the moving side ball seat 313 of the first ball side support unit 31a, close the air float knob, adjust the fine-tuning screw so that the moving side ball seat 313 is in full contact with the ball 201, and the other ball 201 (the right side ball in Fig. 1) Put it on the fixed-side ball seat 22 of the fixed support part 20, then initialize the measured values of the first measuring part 40a to be zero, and then go to step S4.

Step S4, turn on the two air-floating switches of the air-floating slide table 311 of the first ball side support unit 31a, slide the first ball side support unit 31a, and keep the left ball 201 of the bat 200 still on the first ball side On the moving side ball seat 313 of the support unit 31a, simultaneously, open the two air-floating switches of the air-floating sliding workbench 311 of the second ball side support unit 31b, slide the second ball side support unit 31b to a suitable position, and make the bat The ball 201 on the right side of 200 is placed on the ball seat 313 on the moving side, then, record the displacement a of the first ball-side support unit 31a measured by the first measuring part 40a, and initialize the measured values of the second measuring part 40b to be zero, then go to step S5.

Step S5, keep the ball on the moving side ball seat 313 of the second ball side support unit 31b still on the ball seat, pick up the left ball 201 of the bat 200, and open the air bearing of the second ball side support unit 31b Slide the two air-floating switches of the workbench 311, slide the second ball side support unit 31b to a suitable position, make the left ball 201 of the bat 200 be placed on the fixed side ball seat 22 of the fixed support part 20, and the second measuring part Step 40b measures b as the displacement of the second sphere-side support unit 31b, and then proceeds to step S6.

Step S6, calculate the ball center distance L of the bat according to the company L=a+b, and then enter the end state.

Repeat the above steps ten times to obtain the measurement results as shown in the table below:

Table: 300mm ball bat (standard device) measurement results

It can be seen from the above table that, according to the result of the ball center distance measured by this device and the value given by the German DAkks calibration certificate, the technical indicators of the baseball center distance detection device are assessed by calculating the En value. The calculation formula of En is: :

In the formula: A ₂ -A ₁ : the difference between the measured results of the two comparison methods;

U ₁ ² +U ₂ ² : the mean square sum of the measurement uncertainties of the two comparison methods.

In this embodiment, En=0.41, En<1, because |E _n |<1, which proves that the uncertainties of the measurement results of the two methods for the center distance of the baseball and baseball are all within the ranges of the measurement uncertainties assessed respectively.

Function and effect of embodiment

According to the ball center distance detection device and detection method of the present embodiment, because the fixed support part is fixed on the guide rail to support the ball, the ball-side support unit can move on the guide rail and be used to support the ball, and the bat-side support unit can also be used to support the ball. Move on the guide rail and support the club so as to realize the auxiliary support for the club, the measuring part is installed on the bracket, and measure the first distance and the second distance that the two ball side support units move respectively based on predetermined measurement rules, and the calculating part according to The center distance of the bat is calculated from the first distance and the second distance. Therefore, the center distance detection device and detection method of the baseball bat in this embodiment can realize the measurement of the center distance of the bat, and solve the problem of measuring a long bat. The problem that the measurement accuracy is affected by the deformation caused by the gravity of the bat itself makes the measurement more accurate and the cost is low and the structure is simple.

In this embodiment, since the correction part calibrates the support unit on the side of the bat, this embodiment realizes effective auxiliary support for the bat, thereby ensuring accurate detection results.

The above embodiments are preferred examples of the present invention, and are not intended to limit the protection scope of the present invention.

The bat heart distance detection device in this embodiment is used to detect bats of 300m to 1000mm, and the present invention can also be used to detect bats of other lengths, especially for the detection of long bats, which has more prominent advantages.

Claims (5)

1. A ball center distance detection device for a baseball bat, which is used to detect the center distance of a ball bat, said ball bat comprising two spheres and a club connecting said two spheres, characterized in that it comprises: The base body includes: a guide rail and two brackets respectively fixed at both ends of the guide rail; a fixed support part, fixed on the guide rail for supporting the sphere; Two mobile support parts are respectively arranged on both sides of the fixed support part, and each of the mobile support parts includes: a sphere-side support unit movably installed on the guide rail for supporting the sphere, and a movable A club-side support unit for supporting the club is installed on the guide rail between the fixed support portion and the ball-side support unit; The two measuring parts are respectively one-to-one corresponding to the two sphere-side support units and are installed on the two brackets, and respectively measure the first distance moved by one of the sphere-side support units and the first distance of the other based on predetermined measurement rules. a second distance that the spherical side support unit moves; a calibration section comprising a first electrical micrometer mounted on one of said spheres; and a calculation unit that calculates the distance between the centers of the spheres according to the first distance and the second distance, Wherein, the bat side support unit comprises at least one bat side support assembly, The club side support assembly includes: a V-shaped frame for supporting the club, an adjustment member for adjusting the position of the V-shaped frame, and a flexible connection for the V-shaped frame and the adjustment member. flexible parts, said calibration section further comprising at least one second inductive micrometer disposed on said club corresponding to said club side support assembly, The adjustment member adjusts the position of the V-shaped frame according to the indications of the first and second electric inductance micrometers, so that when the V-shaped frame is in contact with the club and the The fixed support portion or the sphere-side support unit is in contact with the sphere. 2. The baseball heart distance detection device according to claim 1, characterized in that: Wherein, the predetermined measurement rule is: by sequentially moving the two moving support parts and placing the two spheres on any two of the two sphere-side support units and the fixed support parts, measure the The moving distance of one sphere-side supporting unit is used as the first distance, and the moving distance of the other sphere-side supporting unit is used as the second distance. 3. The baseball heart distance detection device according to claim 1, characterized in that: Wherein, the number of the bat side support components is two, The number of the second electrical micrometers is two, and they correspond to the bat side support components one by one. 4. The baseball heart distance detection device according to claim 1, characterized in that: Wherein, the adjusting member includes: a first sliding rail arranged parallel to the guide rail, a first sliding block engaged on the first sliding rail, a first sliding block arranged on the first sliding block and The second slide rail perpendicular to the slide rail, the second slide block engaged on the second slide rail, the second slide block and the first slide rail and the second slide rail A third sliding rail perpendicular to the plane where the rail is located, and a third sliding block engaged on the third sliding rail for installing the flexible member. 5. The baseball heart distance detection device according to claim 1, characterized in that: Wherein, the measuring part includes: an emitting unit for emitting a light beam, a reflector mounted on the support unit on the side of the sphere corresponding to the center of the sphere for reflecting the light beam, and The light beam gets a processing unit for the spacing between the emitting unit and the mirror.