CN106606852B

CN106606852B - Archery training device and method

Info

Publication number: CN106606852B
Application number: CN201510706241.2A
Authority: CN
Inventors: 侯瀚云; 其他发明人请求不公开姓名
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-10-27
Filing date: 2015-10-27
Publication date: 2020-08-11
Anticipated expiration: 2035-10-27
Also published as: CN106606852A

Abstract

An archery training device and method. The invention relates to an arrow technology, in particular to a device and a method which are beneficial to improving arrow shooting skills and can be used for arrow shooting entertainment. The archery training device and the method provided by the invention have the advantages that no special field is needed for archery training and entertainment, and no bow and arrow are lost. The technical scheme adopted comprises the following key points: the device that the bowstring can be retracted without deformation of the bowarm is adopted to measure the length of the bowstring and the applied tension in real time, and the bowstring is extended or shortened according to the magnitude of the tension, so that the process of opening the bow by leading the bowstring by a shooter is simulated; meanwhile, when the pulling force on the bowstring disappears, a beam of light is emitted along the aiming direction and irradiates on the photosensitive target, so that arrow shooting is simulated and the performance of shooting is measured.

Description

Archery training device and method

Technical Field

The invention relates to an arrow technology, in particular to a device and a method for archery training.

Background

Arches have been widely used by humans since ancient times. Today, arches are still widely used in sports, recreation, hunting and other fields. The skill necessary for mastering archery needs certain practice, but a proper practice place is not easy to find by using a common bow and arrow; moreover, since the bow cannot be emptied, the arrow needs to be worn and the bow itself needs to be worn during the practice; in addition, the conventional bow cannot conveniently adjust parameters such as tension. Therefore, new techniques and devices are needed to achieve more optimal archery training.

Disclosure of Invention

The invention provides an archery training device and method, which are used for realizing archery training with simulation effect.

The invention adopts the following technical scheme:

archery trainer, characterized by:

comprises a bow handle, a bow arm, a bow string, a string tension meter, a string elongation meter, a string retraction device, a bow light emitter, a bow master controller and a target photoreceptor;

the bow frame is defined as the part which forms the mechanical appearance of the bow except for the bowstring, and the main body of the bow frame is a bow handle and a bow arm;

the front and back of the defined direction accord with the meaning of the common bow and arrow field, namely the direction pointed by the arrow when shooting is front, and the direction for pulling the bowstring when the shooter opens the bow is back;

defining the bow opening process to conform to the meaning of the common bow and arrow field, namely the process that an archer holds a bow handle with one hand and pulls a bowstring backwards with the other hand until the pulling is finished and the bow is ready to be released;

the definition of the chord distance conforms to the meaning of the common bow and arrow field, namely the distance between the initial position of the bow chord and the bow handle, the chord distance is adjustable, but the chord distance is kept unchanged in the bow opening process;

defining the opening bow pulling force as the backward force of the archer pulling bowstring in the process of opening bow;

defining the distance of the open bow pull in the process of opening the bow, wherein the distance of the open bow pull is the backward movement distance of the action point of the open bow pull on the bowstring;

in the process of opening the bow, the bow frame has a determinable geometric shape;

in the process of opening the bow, the bowstring is in a tight state, and when the bowstring is in the tight state, the length extension of the bowstring caused by elasticity is determinable;

defining the length between two connecting points of a bow string and a bow arm as a string apparent length in the process of opening the bow;

in the process of opening the bow, the string lengthener measures the variation of the apparent length of the string and outputs the variation to the bow master controller;

defining the pulling force which is applied on the bowstring by the shooter and along the extending direction of the bowstring as the bow-opening string force in the bow-opening process;

in the process of opening the bow, the string tension meter measures the string tension of the bow and outputs the magnitude of the string tension to the bow master controller;

in the bow opening process, the string retracting device receives a string retracting signal and a string retracting speed signal, shortens the apparent length of the string when receiving the string retracting signal, and determines the shortening amount of the apparent length of the string in unit time according to the string retracting speed signal;

in the bow opening process, the string receiving and releasing device receives a string releasing signal and a string releasing rate signal, when the string releasing signal is received, the string apparent length is increased by the string receiving and releasing device, the amount of increase of the string apparent length in unit time is determined according to the string releasing rate signal, the greater the string releasing rate represented by the string releasing rate signal is, the greater the amount of increase of the string apparent length in unit time is, the smaller the string releasing rate represented by the string releasing rate signal is, the smaller the amount of increase of the string apparent length in unit time is;

in the process of opening the bow, the bow master controller calculates the current value of the open bow pull distance according to the current received variation of the chord apparent length and the geometric shape of the bow frame;

in the process of opening the bow, the bow main controller calculates the current value of the pulling force of the opening bow according to the current value of the string force of the opening bow received currently and by combining the current value of the pulling distance of the opening bow and the geometric shape of the bow frame;

in the process of opening the bow, the bow master controller obtains the opening bow pulling force value which is currently applied by the shooter according to the current value of the opening bow pulling distance and by combining the characteristic parameters corresponding to the bow per se, and the opening bow pulling force value is used as the current pulling force value;

in the bow opening process, the bow master controller compares the current value of the bow opening tension with the current tension value, and outputs a string winding signal and a string winding rate signal to the string winding and unwinding device when the current value of the bow opening tension is smaller than the current tension value, wherein the string winding rate is determined according to the difference value between the current value of the bow opening tension and the current tension value;

in the bow opening process, a bow master controller compares the current value of the bow opening tension with the current tension cost value, when the current value of the bow opening tension is larger than the current tension cost value, a string releasing signal and a string releasing rate signal are output to a string winding and unwinding device, wherein the string releasing rate is determined according to the difference value between the current value of the bow opening tension and the current tension cost value, if the absolute value of the difference value between the current value of the bow opening tension and the current tension cost value is larger, the string releasing rate is larger, if the absolute value of the difference value between the current value of the bow opening tension and the current tension cost value is smaller, the string releasing rate is smaller, and if the apparent length of a string reaches the set maximum value, the string releasing signal and the string releasing rate signal are stopped being output;

in the process of opening the bow, if the pulling force of the bow opening disappears, the bow main controller outputs a firing signal to the light emitting device;

when the bow light emitting device receives the firing signal, a light beam consistent with the aiming line of the shooter is emitted;

the target photoreceptor records the irradiation position of the light beam emitted by the bow light emitter as a result of the hit by the archery.

The archery training device is characterized in that:

in the process of opening the bow, the bow frame has a determinable geometric shape which is as follows:

during the opening of the bow, the bow is not deformed to a non-negligible extent by elasticity, so that its geometry is fixed.

The archery training device is characterized in that:

in the process of opening the bow, the bowstring is in a tight state, and when the bowstring is in the tight state, the length extension of the bowstring caused by elasticity is determinable, and is as follows:

during the opening process, the bowstring does not undergo a non-negligible length extension due to elasticity.

The archery training device is characterized in that:

the string lengthener measures the variation of apparent length of string, and is obtained by measuring the number of revolutions of a pulley around which the bow string is wound.

The archery training device is characterized in that:

the string tension meter measures the open bow string force, and is connected with the bow string in series to measure.

The archery training device is characterized in that:

in the process of opening the bow, the string receiving and releasing device receives the string releasing signal and the string releasing rate signal, when the string releasing signal is received, the string apparent length is increased by the string receiving and releasing device, the amount of increase of the string apparent length in unit time is determined according to the string releasing rate signal, the greater the string releasing rate represented by the string releasing rate signal is, the greater the amount of increase of the string apparent length in unit time is, the smaller the string releasing rate represented by the string releasing rate signal is, the smaller the amount of increase of the string apparent length in unit time is, and the following steps are carried out:

the extensible part of the bowstring is wound on the rotating wheel in advance;

the rotating wheel rotates to release part of bowstring wound on the rotating wheel, and the released part of bowstring is released through the connecting point of the bowstring and the bow arm, so that the apparent length of the string is increased;

the larger the string releasing speed is, the faster the runner rotates, so that the increment of the string apparent length in unit time is larger, and the smaller the string releasing speed is, the slower the runner rotates, so that the increment of the string apparent length in unit time is smaller;

the bow arm is generally divided into an upper bow arm and a lower bow arm, and the bowstring has one connection point with each of the upper bow arm and the lower bow arm, so that the bowstring has two connection points with the bow arm, and the released partial bowstring is released from the two connection points simultaneously, and the released length is the same in the same time period.

The archery training device is characterized in that:

the elastic component is connected with the bow string in series, and the elastic component is positioned between the string retractor and the string tension meter.

The archery training device is characterized in that:

if the bow-opening pulling force disappears, the bow main controller outputs a firing signal to the light emitting device, and the firing signal is as follows:

the reduction rate of the currently received bow opening pulling force of the bow master controller exceeds a set threshold value, and then the bow master controller outputs a firing signal to the light emitting device.

The archery training device is characterized in that:

when the bow light emitter receives a firing signal, the bow light emitter emits a light beam consistent with the aiming line of the shooter, and the method comprises the following steps:

the light beam emitted by the arched light device is consistent with the geometric axis thereof;

for the bow which adopts the rear peephole and the front sighting device to form a sighting mechanism, a rubber band of the peephole for drawing the peephole is tied to be consistent with a sighting line, then a bow light emitter is attached to the rubber band of the peephole, and the geometric axis of the bow light emitter is consistent with the straightening direction of the rubber band.

The archery training method is characterized in that:

adopting a bow arm with a determined geometric shape and no elastic deformation;

the bowstring which is retractable in length and does not extend elastically is adopted;

defining the bow opening tension as the backward force of the archer pulling the bowstring;

defining the bow-opening pull distance as the backward moving distance of the action point of the bow-opening pull force on the bowstring;

in the process of opening the bow, measuring the length variation of the bowstring at the current moment and the pulling force borne by the bowstring, and accordingly obtaining the opening pull distance and the opening pulling force at the current moment;

comparing preset bow characteristic parameters according to the measured bow-opening pull distance at the current moment to obtain a bow-opening pull force value which is required to be applied at the current moment, comparing the bow-opening pull force value which is required to be applied with the measured bow-opening pull force, if the bow-opening pull force value which is required to be applied is smaller than the measured bow-opening pull force, increasing the length of a bowstring, otherwise, shortening the length of the bowstring;

if the measured bow-opening pulling force at the current moment tends to disappear, light beams are emitted along the aiming direction;

the target senses the position of the beam irradiation as a result of the archery hitting the target.

The invention has the beneficial effects that: (1) the action process of opening the bow and releasing the arrow by the shooter can be simulated really; (2) the device can simulate different tension and pull distance characteristics, thereby being suitable for various types of bows such as a recurve bow, a compound bow and the like; (3) the elastic stress deformation part is not arranged, and the safety is high; (4) no arrow is consumed, and the use cost is low; (5) the device is not limited by places; (6) and the electronic target is matched, so that the target simulation capability is strong, and the entertainment is good.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of a configuration for increasing and decreasing the length of a chord.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The terms and terms of bow, arrow, bowstring, bow handle, bow arm, pulley, squat, distance, bow, distance, arrow, sight, peephole, front and back, etc. are used in accordance with the common meanings of bow and arrow and related art, and are not specifically defined or limited herein.

FIG. 1 is a schematic structural diagram of an archery training device. The overall shape of the bow is mainly composed of a bow handle 110, an upper bow arm 120 (note: the bow arm is also called as a bow slice) and a lower bow arm 130, except for bowstrings, in view of the appearance shape by omitting small-sized accessories such as bolts and shock absorbing sheets; for simplicity and clarity, the bow mainly comprising the handle 110, the upper arm 120 and the lower arm 130 is referred to as a bow frame as a whole. Wherein, the relative position of the upper bow arm 120 and the lower bow arm 130 with the bow handle 110 can be changed along the front-back direction, thereby the chord distance can be adjusted; for example, when the upper and

lower arms

120, 130 are moved rearward, the chordal distance increases. After the upper and

lower limbs

120, 130 are adjusted to a desired chord distance, the upper and

lower limbs

120, 130 are not moved during the opening process, thereby maintaining the chord distance. During the opening process, the upper arm 120, the lower arm 130 and the handle 110 are not deformed elastically, which is not negligible or unpredictable, so that the bow frame has a determinable geometric shape. The pulley 310 is arranged at the joint of the upper bow arm 120 and the bow string, and the pulley 320 is arranged at the joint of the lower bow arm 130 and the bow string; in fact, the pulley 310 and the pulley 320 form the upper and lower connection points of the bow string and the bow arm (or the bow string and the bow frame). The bow string between the pulley 310 and the pulley 320 is called a string viewing section 210; the chordal section 210 includes a bowstring portion for the archer to pull the bowstring to perform an opening action and an arrow; the length of the chordal section 210 is referred to as the chordal length. During the process of opening the bow, as the shooter pulls the bowstring backwards, the apparent length of the string will increase continuously until it reaches its maximum value at the end of the process of opening the bow. If the whole bow string involved in the device is taken as a whole, the connection sequence of the bow strings is as follows: the head end of the bow string starts from a string winding and unwinding device 530, then is connected with a string tension meter 520 in series, then passes through a bow upper end pulley 330, further passes through a pulley 310 in a string view section mode to be connected to a pulley 320, and finally passes through a bow lower end pulley 340, and the tail end of the bow string returns to the string winding and unwinding device 530; in the path of the bowstring, depending on the shape of the bow frame, the bowstring will pass around pulleys, such as pulley 330 and pulley 340 in this embodiment, at each bend; all pulleys around which the bowstring passes or passes should reduce the friction force to which the string is subjected when moving around the pulleys as much as possible.

Unlike traditional bow, such as reverse bow, modern composite bow adopts force converting structure, such as cam, and the like, and during the bow opening process, the pulling force is not monotonously changed along with the pulling distance, but has a small-large-small changing process; moreover, the pull distance cannot be increased backwards at a glance, but has a maximum value; the bow with different characteristics has different action relationships among the tension and the pull distance. The real reflection of the characteristics is the key for improving the performance of the archery training device; for this reason, it is necessary to measure the values of the pull distance and the pull force during the opening process in real time and to adjust the response of the device to the shooter's behavior accordingly.

Since in the field of arches in general and their technology there are several different versions regarding the definition of the pull distance and the pulling force, in order to make the description more precise, the invention defines in particular the "open bow pulling force" and the "open bow pull distance". Definition the opening pull is the amount of force that the shooter pulls the bowstring backwards during the opening process. The opening pull distance is defined as the distance that the point of action of the opening pull on the bowstring moves backwards during the opening process. Generally, the point of application of the opening tension on the bowstring is located at the "string ring" or "nock", i.e., the rearmost position of the bowstring. The "open bow pull" and its maximum as defined in the present invention are different from what is commonly referred to as "pull" and its maximum in meaning. However, the difference between these terms does not affect the understanding and application of the technical solution described in the present invention; because, those skilled in the art can easily understand the differences between these noun terms and how to bridge the differences to obtain the interconvertions. For example, the distance to be measured is the distance from the bow to the bow starting from the bow, while the open-bow distance of the present invention is the distance from the bow starting from the initial position of the bow to the bow; this differential distance is actually the chordal distance that is determined during the bowing process. For another example, when calculating the pull distance starting from the bow, there are also different defined versions, which may result in a difference of the width of the bow grip; however, such deviations can be compensated for, since the width of the handle grip is known. Thus, the open bow pull force and open bow pull distance specifically defined by the present invention do not affect the understanding and use of what is commonly referred to as pull force and pull distance; at the same time, possible differences are eliminated, so that the description is more accurate.

For measuring open bow pull distanceValue, using a chord lengthgauge 510. Since the geometry of the bow is deterministic, the initial length of the chordal apparent length is deterministic, i.e., the length of the chordal apparent length at the chordal apparent length initial position 220. Therefore, only the variation of the chord apparent length is measured, the current value of the chord apparent length can be calculated, and the corresponding open bow pull distance value can be further calculated. The variation of the apparent length of the string can be measured in various ways; in the present embodiment, it is assumed that the string lengthgauge 510 counts the number of rotations of the pulley 330 to determine the amount of change in apparent length of the string. Assuming that the diameter of the pulley 330 is 10 cm, 20 electrical pulses correspond to each circle of the pulley 330, and the arc lengths of the arc sections of the circles corresponding to the electrical pulses are the same (the result can be realized by devices such as photoelectric or magnetic induction, which are not described herein), each electrical pulse increases the count by one when the pulley rotates forward (assuming that the chord length is increased by the forward rotation), and each electrical pulse decreases the count by one when the pulley rotates backward; the chord lengthgauge 510 then simply counts the number of pulses to calculate the apparent length of the chord added along the pulley 330 "

". Because the tension of the bowstring on the upper and lower bowarms is symmetrical when the bow is opened, the length of the apparent length of the bowstring increased along the pulley 330 (and along the pulley 310) is the same as the length of the apparent length of the bowstring increased along the pulley 340 (and along the pulley 320), and the total increase of the apparent length of the bowstring is obtained "

". It is noted that although the bowstring has a certain elongation, the material properties of the bowstring are usually characterized as "flexible" rather than "elastic", and therefore, the change in the length of the bowstring due to the elasticity is not significant, especially after the bowstring has been in a taut state; for this reason, the influence of the bow-string elongation can be ignored when measuring the amount of increase in the apparent length of the string, so that the bow-string length extension due to elasticity is determinable (i.e., ignored); of course, the length change caused by elongation can also be calculated using a more complex and comprehensive calculation function,so that the bow-string length extension due to elasticity is always determinable (this embodiment is not described). The chord lengthener 510 transmits the amount of change in the measured chord apparent length to the bow master 610.

To measure the current force magnitude of the bowstring, a string tension meter 520 is employed. The string tension meter 520 may employ any mechanical, electronic, or integrated form of tension measuring device; provided it has two mechanical connection ends for connection in series with the bowstring, and a "tension-electrical signal" conversion means and an interface for outputting the measurement results. Furthermore, to avoid the effect of elastic deformation that the string tension meter 520 itself may have on the measurement of the string length, the string tension meter 520 should be installed behind the string tension meter 510 or at a position further away from the pulley 330 than the string tension meter 510; for example, the string tension meter 520 is installed at a position between the string lengthgauge 510 and the string retractor 530. Since the string tension meter 520 is connected in series with the string, the tension measured is in the direction of the bow-string extension; the pulling force applied to the bowstring by the shooter along the extending direction of the bowstring is called the open bow string force. It should be noted that the measurement of the string tension meter 520 should take into account the initial tension of the string itself; that is, at the very beginning of the bowing process, the string itself has some initial tension before the shooter applies the pulling force that pulls the bow string, since the string has been previously taut; this initial tension can be recorded as a known value, measured by the chord tension meter 520 itself, and subtracted from the final result. Alternatively, the initial tension of such strings may be pre-measured and stored in the bow master 610, so that the results received from the string tension meters 520 by the bow master 610 may be removed; in any case, the measurement error can be eliminated, and the detailed description is omitted here. In addition, the resistance added by the pulley should also be deducted; but the sheave resistance is typically small and negligible. The string tension meter 520 transmits the measured open bow string force to the bow master 610.

The bow master controller 610 can calculate the current value of the open bow pull distance according to the variation of the currently received chord apparent length and the geometry of the bow frame. This is easy to calculate: stringThe initial value of the apparent length is determined by the geometrical shape of the bow frame, the current value of the chord apparent length is equal to the initial value of the chord apparent length plus the variation of the chord apparent length, and when the action point of the open bow pulling force is positioned at the middle point of the chord apparent length, the method can be obtained by solving a trigonometric function. For example: if the increase in apparent chord length is 20 cm and the initial length of apparent chord length is 80 cm, then the current value of the open bow pull distance is equal to "

"; that is, the distance from the rearmost point of the viewing chord 210 to the initial position 220 of the viewing chord is 30 cm, or the distance that the opening tension acts backward is 30 cm.

The bow master controller 610 can calculate the current value of the open bow pulling force according to the currently received open bow string force by combining the current value of the open bow pulling distance and the geometric shape of the bow frame. This is easy to calculate, because: under the condition of known open bow pull distance and geometric shape of the bow frame, the proportional relation between the open bow pulling force and the open bow string force can be obtained by utilizing the force decomposition and synthesis principle, so that the open bow string force can be converted into the open bow pulling force. For example, if the initial value of the chordal length determined by the bow frame is 80 centimeters, the point of action of the open bow tension is at the midpoint of the chordal segment, the current value of the open bow pull distance is 30 centimeters, and the current value of the open bow chord force is 50 pounds, then the current value of the open bow tension can be calculated as "(first calculation)

(second step calculation)

”。

The bow master controller 610 can obtain the characteristics of the simulated bow of the open bow pulling force and the open bow pulling distance according to the prestored or set parameters of the simulated bow of the pull force-the pulling distance, the string distance and the like; therefore, the corresponding open bow pulling force of the bow per se under the current open bow pulling distance is obtained and is taken as the current pulling force cost value. The bow master controller 610 compares the current bow-opening pulling force with the pulling force cost value if the current bow-opening pulling force and the pulling force cost value are not equalWhen the opening tension is smaller than the tension value, outputting a string winding signal to the string winding and unwinding device 530, and outputting the magnitude of the string winding speed according to the difference value of the opening tension and the tension value; if the current opening bow pulling force is larger than the current pulling force, a string releasing signal is output to the string releasing device 530, and the magnitude of the string releasing rate is output according to the difference between the current opening bow pulling force and the current pulling force (for example, the greater the absolute value of the difference between the current opening bow pulling force and the current pulling force, the greater the string releasing rate). For example, the current measured and calculated open bow pull distance is 10 inches and the open bow pull force is 40 pounds; according to the characteristic parameters of 'tension-pull distance' of the simulated bow, the tension cost value is 35 pounds under the condition that the corresponding open bow pull distance is 10 inches; because the open bow pulling force is larger than the pulling force basic value, the bow master controller 610 outputs the string releasing signal to drive the bow releasing and retracting device 530 to increase the length of the bow string, and the absolute value of the difference value between the open bow pulling force and the pulling force basic value "

", as a level of speed that actuates the bow retractor 530 to release the bowstring. If the current value of the open bow pull distance has reached the set maximum value (for a compound bow, the pull distance is limited by the maximum value), even if the open bow pull force is greater than the pull force cost value, the string unwinding signal is not emitted any more (in the case of no unwinding signal, the string unwinding rate signal is ignored by the string unwinding device).

The string winding and unwinding device 530 receives the string winding signal and the string winding rate signal, and the string unwinding signal and the string unwinding rate signal from the bow master 610, and determines whether to increase or decrease the apparent length of the string, and how fast the apparent length of the string is to be increased or decreased. It should be noted that, assuming that the pulling force of the opening bow acts on the center of the string visual segment, the forces of the bowstring on the upper and lower arms during the opening bow are symmetrical, so that no matter the string visual length is increased or shortened, the operations should be performed simultaneously and at the same length at two connecting points of the bowstring and the bowarm. Taking the example of increasing the chordal apparent length, the increased length of the chordal apparent length via pulley 310 is equal to the increased length via pulley 320 over the determined period of time. The string retractor 530 may have various forms of electromechanical structures to meet the bow string retraction requirements; an example structure is given below.

FIG. 2 is a schematic diagram of a configuration for increasing and decreasing the length of a chord. The rotation power of the power unit 810 (assumed to be composed of a motor, a gearbox and a control circuit) is transmitted to the driving wheel 820, the driving wheel 820 drives the winding wheel 830 to rotate, and the upper extension string 250 and the lower extension string 260 are wound on the winding wheel 830; wherein the upper extending string 250 leads to the upper yoke (eventually interfacing with the chordal view via pulley 310 of the upper yoke) and the lower extending string 260 leads to the lower yoke (eventually interfacing with the chordal view via pulley 320 of the lower yoke). When it is desired to increase or decrease the chord apparent length, the locking pin 850 is first released to allow the drive pulley 820 and the wind-up pulley 830 to rotate; if the apparent length of the string is shortened, the driving wheel 820 rotates clockwise to drive the winding wheel 830 to rotate anticlockwise, so that the upper extension string 250 and the lower extension string 260 are wound; if the apparent length of the string is to be shortened, drive wheel 820 rotates in a counterclockwise direction, causing winding wheel 830 to rotate clockwise, thereby paying out the wound portions of upper extending string 250 and lower extending string 260 (note: the clockwise/counterclockwise rotation described herein corresponds to shortening/increasing the apparent length of the string, depending on the manner in which the string is wound). Since the upper and lower extension strings 250 and 260 are both wound on a wheel of the same diameter and the amount of rotation of the wheel is the same for both, the shortening of the chord apparent length and the increasing of the chord apparent length occur at the same time and at the same length at both points of the connection of the chord apparent segment and the limb. In addition, the string winding rate and the string unwinding rate can be used as parameters for controlling the rotating speed of the driving wheel 820, for example, the larger the string unwinding rate is, the larger the current supplied to the motor is, and the faster the driving wheel 820 rotates counterclockwise; thus, the requirements of increasing and shortening the apparent length of the string are met. The locking pin 850 is locked to prevent rotation of the drive wheel, and hence the winding wheel, when the chord length does not need to be changed.

To balance the fluctuations in tension, provide a more continuous feel of tension to the shooter, and to tighten the action of the bowstring in the initial state, elastic members (such as springs) may be connected in series in the bowstring. Connecting the elastic members in series requires avoiding the influence of the stretching of the elastic members themselves on the measurement of the apparent length of the string, and therefore the elastic members should be connected in series somewhere between the string extensometer and the string takeup and payoff.

Based on the measurement of the opening force, if the rate of decrease of the opening force (i.e., the absolute value of the decrease in opening force per unit time) exceeds a set threshold, the shooter is deemed to have "fired" (i.e., the shooter releases the bowstring, releases the tension or discharge on the bowstring and shoots the arrow). When "firing" is detected, the bow master 610 sends a firing signal to the bow light emitter; upon receipt of the firing signal, the bow light emitter emits a beam of light that is coincident with the shooter's line of sight. The arching light device can have a variety of forms. For example, the bow light emitter may be cylindrical and fixed to the bow grip in a position such that its axis coincides with the line of sight of the shooter; upon receipt of a firing signal, a beam of light is emitted instantaneously along its axis. For another example, compound bows often use a rear "peephole" attached to the main bow string and a front "sight pin" attached to the bow handle to form a sight line; thus, the rubber band of the peephole for aligning the peephole can be bound to be consistent with the aiming line, the bow light emitter is attached to the rubber band of the peephole, and the geometric axis of the bow light emitter is consistent with the straight direction of the rubber band; upon receipt of a firing signal, a beam of light is emitted instantaneously along its axis. The light emitted by the bow light applicator may be a laser, infrared or other type of beam, so long as it forms a focused spot or spot of light that is sensed by the target photoreceptor.

The target photoreceptor senses the irradiation of the light beam emitted by the bow light emitter and records the irradiation position; this position information can be translated into archery achievements. The target photoreceptor may have other ancillary functions, making archery training more effective and interesting. For example, the target surface may be a "screen" showing various target shapes, even moving targets; for another example, the target can have functions of storage, data transmission and the like, so that the scores of archery each time are transmitted to intelligent equipment such as a mobile phone and the like, and the scores of archery can be conveniently summarized, analyzed, contrasted, scored and the like.

A pendulum bob which swings along with the firing can be attached to the bow arm, so that the vibration generated along with the firing is simulated; devices such as a level meter and the like capable of detecting the holding posture of the bow handle can be installed to help perfect the action specification of the shooter; and a balance weight capable of adjusting the overall mass of the bow and the like can be installed. The additional components and devices help to make the process of simulating archery more realistic and efficient.

The above embodiments are only specific implementations performed according to the technical solution of the present invention; general changes and substitutions within the technical scope of the present invention should be included in the protection scope of the present invention.

The present invention is applicable to all apparatus and methods constructed in accordance with the teachings of the present invention and variations available without the ability of other inventive features. Thus, the present invention is to be accorded the widest scope consistent with the principles and features described herein.

Claims

1. Archery trainer, characterized by:

the bow frame is defined as the part which forms the mechanical appearance of the bow except for the bowstring, and the main body of the bow frame is a bow handle and a bow arm; the front and back of the defined direction accord with the meaning of the common bow and arrow field, namely the direction pointed by the arrow when shooting is front, and the direction for pulling the bowstring when the shooter opens the bow is back;

in the process of opening the bow, if the pulling force of the bow opening disappears, the bow master controller outputs a firing signal to the bow light emitting device;

2. The archery training device of claim 1, wherein:

3. The archery training device of claim 1, wherein:

4. The archery training device of claim 1, wherein:

5. The archery training device of claim 1, wherein:

6. The archery training device of claim 1, wherein:

the extensible part of the bowstring is wound on the rotating wheel in advance;

7. The archery training device of claim 1, wherein:

8. The archery training device of claim 1, wherein:

if the bow-opening pulling force disappears, the bow main controller outputs a firing signal to the bow light emitting device, and the firing signal is as follows:

the reduction rate of the currently received bow-opening pulling force of the bow master controller exceeds a set threshold value, and then the bow master controller outputs a firing signal to the bow light emitting device.

9. The archery training device of claim 1, wherein:

10. The archery training method is characterized in that: