CN100399045C

CN100399045C - Method for radio measuring cast distance for throwing sports

Info

Publication number: CN100399045C
Application number: CNB2005100217419A
Authority: CN
Inventors: 田永茂
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-09-26
Filing date: 2005-09-26
Publication date: 2008-07-02
Anticipated expiration: 2025-09-26
Also published as: CN1743868A

Abstract

The present invention discloses a method for measuring throwing distance by radio for throwing sports. The present invention is composed of a main machine and an auxiliary machine with matched radio communication, wherein the main machine comprises a radio receiving and transmitting assembly, a selection circuit, a conversion circuit, a calculation assembly and a display assembly; the auxiliary machine which is arranged on a thrown object comprises a radio receiving and transmitting assembly, a selection circuit, a conversion circuit and a control circuit; the main machine and the auxiliary machine orderly and coordinately work by relying on each other and responding to short pulses. The method is practically used for measuring the thrown distance of thrown objects, such as javelins, discuses, lead balls, etc., and is also used for measuring the thrown distance of training bombs in throwing trainings in armies.

Description

The method of radio measuring cast distance for throwing sports

Technical field

The present invention relates to a kind of method of in the type games ammunition cast being found range of throwing.

Background technology

The device and the method for range finding are various at present, if any infrared ambulator, ultrasonic range finder, laser range finder, radio distance-measuring set etc.But these devices all can not be found range to the cast of ammunition.At present as in the sports to the measurement of ammunition casts such as javelin, discus still to draw tape measure or at the method measuring distance of the throwing zoning equal portions line of the throwing field of ammunition, the shortcoming of these methods is: 1, efficiency of measurement is low; 2, the staff of measure field has personal safety hidden danger; 3, in the process of performance evaluation, exist may waiting of cheating in measurement links.

Summary of the invention

The objective of the invention is at the deficiencies in the prior art, a kind of method of utilizing radiotelegraphy to measure ammunition cast automatically is provided, and this invention angle between its tracks and the surface level, i.e. angle of trajectory also can calculate ammunition and sell the time.Be useful for as: measure the cast of the ammunitions such as javelin, discus, shot of sports item, when also being useful for army's grenade-throwing training to the measurement of dummy round cast.

For realizing described purpose, the present invention is made up of main frame and secondary machine.Be the wireless communication of corresponding coupling between main frame and the secondary machine.Described main frame comprises transceiver components, selects circuit, change-over circuit, computation module, display module.Described secondary machine is installed in and comprises transceiver components, selection circuit, change-over circuit, control circuit on the ammunition.Between main frame and the secondary machine be rely on, response short pulse co-ordination in steps each other.

The secondary machine that carries on the described ammunition has the control circuit of slipping out of the hand, the moment that ammunition is slipped out of the hand produces an A4 short pulse by the control circuit of slipping out of the hand, radiating circuit through secondary machine is transmitted into the A4 short pulse in the air with wireless form, the receiving circuit of main frame receives immediately, is transferred to the computation module of main frame after A4 selects circuit to select; The moment that described ammunition lands, A1 short pulse of control circuit generation of secondary machine was launched through radiating circuit, and the receiving circuit of main frame receives immediately; Selecting circuit to select the A1 short pulse through A1 is transferred to the A2 change-over circuit and converts the A2 short pulse to, the A2 short pulse is transferred to the radiating circuit of main frame, radiating circuit is divided into two-way with the A2 short pulse: the one tunnel with wireless form to aerial emission A2 short pulse, another road is transferred to the computation module of main frame, and the computation module of main frame calculates the time difference between A4 short pulse and the A2 short pulse; The receiving circuit of secondary machine receives the A2 short pulse after A2 selects circuit to select the A2 short pulse is transferred to the A3 change-over circuit and converts the A3 short pulse to, described A3 short pulse is transferred to the form emission of the radiating circuit of secondary machine with radiowave, and the receiving circuit of main frame receives the A3 short pulse immediately; Select circuit to filter out the computation module that the A3 short pulse is transferred to main frame through A3, this moment main frame computation module calculate time difference between A2 short pulse and the A3 short pulse, and and correlation parameter calculate the cast of ammunition; The computation module of last main frame is done a comparison, calculating with the time difference between the time difference between A4 short pulse and the A2 short pulse and A2 short pulse and the A3 short pulse and correlation parameter, the angle of trajectory when calculating ammunition and launching.

Description of drawings

Fig. 1 is the block scheme of first kind of embodiment of the method for radio measuring cast distance for throwing sports of the present invention.

Mark among the figure: a is secondary machine; B is a main frame.

Fig. 2 is the block scheme of second kind of embodiment of the method for radio measuring cast distance for throwing sports of the present invention.

Mark among the figure: a is secondary machine; B is a main frame.

Fig. 3 is the synoptic diagram of movement locus of ammunition of the method for radio measuring cast distance for throwing sports of the present invention.

Embodiment

Describe the preferred embodiments of the present invention in detail below in conjunction with accompanying drawing.

Referring to Fig. 1, shown in embodiment wherein, between main frame and the secondary machine radio communication of corresponding coupling, be to rely on, respond short pulse co-ordination in steps each other between them.Secondary machine is mounted on the ammunition, secondary machine comprises that the receiving circuit back that has the sending and receiving antenna connects A2 and selects circuit, what A2 selection circuit connected later is the A3 change-over circuit, what the A3 change-over circuit connected later is radiating circuit, control circuit also is connected on the radiating circuit, has emitting antenna on the radiating circuit.Main frame comprises that the receiving circuit back of being with receiving antenna has connected an A1 and selected circuit and an A3 to select circuit, what A1 selection circuit connected later is the A2 change-over circuit, what the A2 change-over circuit connected later is radiating circuit, radiating circuit has emitting antenna, and the radiating circuit back also is connected with computation module simultaneously; A3 selects circuit also to be connected on the computation module; What computation module connected later is the output display circuit.Moment that ammunition lands, the control circuit of secondary machine produced the radiating circuit that an A1 short pulse is transferred to secondary machine, and was transmitted in the air with the formation of radiowave, received immediately by the receiving circuit of the main frame of correspondence; The receiving circuit of main frame receives the A1 short pulse after processing and amplifying, selecting circuit to filter out the A1 short pulse by A1 is transferred to the A2 change-over circuit and it is varied to the A2 short pulse (the A2 change-over circuit can be a freq converting circuit, the A1 short pulse is changed to another kind of frequency forms the A2 short pulse.The A2 change-over circuit can also be a coding circuit, the A1 short pulse is changed to a coding short pulse forms A2 short pulse etc.The purpose of A2 change-over circuit is exactly the A1 short pulse to be varied to a short pulse that is different from the A1 short pulse form the A2 short pulse in a word.), the A2 change-over circuit is transferred to the A2 short pulse radiating circuit of main frame, radiating circuit is divided into two-way with the A2 short pulse: one tunnel emitting antenna of radiating circuit that is transferred to main frame with the form of radiowave to aerial emission A2 short pulse, another road is transferred to the computation module (timer of computation module picks up counting simultaneously, and prepares to receive the A3 short pulse) of main frame.Accurate in order to guarantee to participate in parameters calculated, radiating circuit be transferred to computation module the A2 short pulse, be to be transferred to computation module from the A2 short pulse that the tie point of the radiating circuit of main frame and its emitting antenna is punished out certain amplitude.After the radiating circuit of main frame was launched the A2 short pulse, the receiving circuit of secondary machine received immediately; After handling A2 short pulse amplification shaping, the receiving circuit of secondary machine is transferred to A2 selection circuit (it is corresponding coupling of A2 short pulse that changes generation with the A2 change-over circuit of main frame that the A2 of secondary machine selects circuit), selecting circuit to filter out the A2 short pulse by A2 is transferred to the A3 change-over circuit (the A3 change-over circuit can be a freq converting circuit, the A2 short pulse is become another kind of frequency form the A3 pulse.The A3 change-over circuit can also be a coding circuit, the A2 short pulse is changed to a coding short pulse forms the A3 short pulse.The purpose of A3 change-over circuit is the A2 short pulse to be varied to a short pulse that is different from the A2 short pulse form the A3 short pulse in a word.), the A3 change-over circuit is transmitted into by the radiating circuit of the secondary machine form with radiowave after with A3 short pulse processing and amplifying in the air.After of the radiating circuit emission of A3 short pulse by secondary machine, the receiving circuit of main frame receives immediately, the receiving circuit of main frame with the A3 short pulse that receives amplify, shaping handles the back and selects circuit to screen (it is to change the corresponding coupling of A3 short pulse that produces with the A3 change-over circuit of secondary machine that A3 selects circuit) by A3, is transferred to the computation module (timer of computation module stops timing after the A3 short pulse arrives) of main frame after A3 selects circuit with the optimization process of A3 short pulse.This moment main frame the computation module cast that just calculates ammunition according to the time difference between the A3 short pulse that begins to transmit the A2 short pulse that comes and transmission afterwards and correlation parameter.Last computation module is transferred to display circuit with result calculated, shows with form intuitively.

Referring to Fig. 2, shown in embodiment wherein, between main frame and the secondary machine radio communication of corresponding coupling, be to rely on, respond short pulse co-ordination in steps each other between them.Secondary machine is mounted on the ammunition, secondary machine comprises that the receiving circuit back that has the sending and receiving antenna connects A2 and selects circuit, what A2 selection circuit connected later is the A3 change-over circuit, what the A3 change-over circuit connected later is radiating circuit, radiating circuit has also connected control circuit respectively and the control circuit of slipping out of the hand, and has emitting antenna on the radiating circuit.Main frame comprises that the receiving circuit back of being with receiving antenna has connected A1 respectively and selected circuit, A3 to select circuit, A4 to select circuit, what A1 selection circuit connected later is the A2 change-over circuit, what the A2 change-over circuit connected later is radiating circuit, and radiating circuit has connected emitting antenna and computation module respectively; What A4 selection circuit connected later is computation module; What A3 selection circuit connected later is computation module; What computation module connected later is the output display circuit.The secondary machine that carries on the described ammunition has the control circuit of slipping out of the hand, produce an A4 short pulse in the moment that ammunition is slipped out of the hand by the control circuit of slipping out of the hand, through the radiating circuit of secondary machine form the A4 short pulse is transmitted in the air with radiowave, the receiving circuit of main frame receives immediately, after selecting circuit to screen, A4 is transferred to computation module (timer of computation module picks up counting simultaneously, and prepares to receive the A2 short pulse); The moment that described ammunition lands, A1 short pulse of control circuit generation of secondary machine was launched through radiating circuit, and the receiving circuit of main frame receives immediately; Selecting circuit to filter out the A1 short pulse through A1 is transferred to the A2 change-over circuit and converts the A2 short pulse to, the A2 short pulse is transferred to the radiating circuit of main frame, radiating circuit is divided into two-way with the A2 short pulse: lead up to emitting antenna with the form of radiowave to aerial emission A2 short pulse, another road is transferred to the computation module of main frame (after computation module receives the A2 short pulse, on the one hand the timer of computation module stops the timing to the A4 short pulse, calculates time difference between A4 short pulse and the A2 short pulse by computation module.Another timer of computation module has begun the timing to the A2 short pulse again on the other hand, and preparation receives the A3 short pulse), the computation module of main frame goes out the ammunition parabolical arc length of orbit aloft according to the time difference between A4 short pulse and the A2 short pulse and relevant calculation of parameter; The receiving circuit of secondary machine receives the A2 short pulse after A2 selects circuit to filter out the A2 short pulse is transferred to the A3 change-over circuit and converts the A3 short pulse to (the A3 change-over circuit can be a freq converting circuit, the A2 short pulse is become another kind of frequency form the A3 pulse.The A3 change-over circuit can also be a coding circuit, the A2 short pulse is changed to a coding short pulse forms the A3 short pulse.The purpose of A3 change-over circuit is the A2 short pulse to be varied to a short pulse that is different from the A2 short pulse form the A3 short pulse in a word.), described A3 short pulse is transferred to the form emission of the radiating circuit of secondary machine with radiowave, and the receiving circuit of main frame receives the A3 short pulse immediately; Select circuit to filter out the computation module that the A3 short pulse is transferred to main frame through A3, the cast that (this moment, the timer of computation module of main frame stopped timing to the A2 short pulse) computation module calculates ammunition according to the time difference between A2 short pulse and the A3 short pulse and correlation parameter; The computation module of last main frame is according to the ammunition cast and the relevant calculation of parameter of working time (time difference between A4 short pulse and the A2 short pulse just) and the ammunition angle of trajectory that goes out ammunition aloft.

Referring to Fig. 1 of the present invention, Fig. 2 as can be known, the moment that after ammunition is launched, lands in the first time, control circuit by the secondary machine that carries on the ammunition produces an A1 short pulse, here control circuit produces the A1 short pulse can following several form and method: 1, select a vibroswitch for use, its vibroswitch of the moment short pulse closed apace or that disconnection produces that lands along with ammunition forms the A1 short pulse after amplifying shaping; 2, its vibroswitch of moment that lands along with ammunition is opened an oscillator, forms the A1 short pulse by its short pulse of exporting a controlled duration; 3, control circuit also can produce the A1 short pulse by, peripheral circuit auxiliary as some sensors such as proximity transducer, displacement transducer and its.In order to guarantee in the end to calculate the information that participates in calculating in the link, the information that ammunition lands for the first time during just each the throwing, can be with following several forms or method: 1, on ammunition, establish a reset button at the control circuit of secondary machine, have only whenever by described control circuit after the reset button next time to produce an A1 short pulse, A1 short pulse of the every generation of control circuit just all must be pressed reset button one time; 2, the RC delay circuit of enough duration is set at the suitable contact place of described vibroswitch circuit, this RC delay circuit begins charge and discharge process when described control circuit produces first A1 short pulse, and RC delay circuit control circuit when charge and discharge process can not be worked again, this just guaranteed ammunition after the moment control circuit that lands produces an A1 short pulse to ammunition in the static process control circuit all can not produce the A1 short pulse again; 3, the RC delay circuit that in described oscillatory circuit, connects a suitable duration, guarantee ammunition after the moment control circuit that lands produces an A1 short pulse to ammunition in the static process, control circuit all can not be worked again; 4, select to connect a control circuit in circuit or the A2 change-over circuit at the A1 of main frame, make it make response transmitting first A1 short pulse that comes.Certainly the form and the method for the form of control circuit generation A1 short pulse and method and restriction control circuit generation A1 short pulse number of times are not limited to above those examples of enumerating, also can take other methods.

Referring to Fig. 2, shown in embodiment wherein, the A4 short pulse that the control circuit of slipping out of the hand produces is that a kind of human induction switch and interlock circuit produce, its principle method can be done metallic object at the handgrip place of ammunition, it is connected on the human induction switch, when ammunition at the moment human induction switch immediate response of just having slipped out of the hand, control, participate in corresponding circuit and produce the A4 short pulse.Same principle human induction switch also can be replaced by a mechanical switch.

Referring to Fig. 1 of the present invention, Fig. 2 as can be known, to select circuit be for the receiving circuit that stops main frame the A2, the A3 that receive, A4 and aerial some other undesired signal, noise signal etc. to be transferred in the next stage circuit to A1.It is for the receiving circuit that stops secondary machine the A1, the A3 that receive, A4 and aerial some other undesired signal, noise signal etc. to be transferred in the next stage circuit that A2 selects circuit.It is for the receiving circuit that stops main frame the A1, the A2 that receive, A4 and aerial some other undesired signal, noise signal etc. to be transferred in the next stage circuit that A3 selects circuit.It is for the receiving circuit that stops main frame the A1, the A2 that receive, A3 and aerial some other undesired signal, noise signal etc. to be transferred in the next stage circuit that A4 selects circuit.

Referring to Fig. 3 of the present invention as can be known, can calculate the angle of trajectory of ammunition with following computing formula.In actual calculation, consider the elemental height of throwing bead, as figure (3) be exactly elemental height be that h is a synoptic diagram:

Two formula are arranged below:

\frac{1}{2} g t_{0}^{2} - v_{0} t_{0} \sin a = h

x ₀＝v ₀t ₀cosa

t ₀---the traveling time from the throw point to the pick-up point;

The elemental height of h---throw point is as figure (2)

x ₀---the distance from the throw point to the pick-up point

G---gravity adds height, generally gets g=9.8

So the elemental height direction that draws is: (angle of trajectory just)

tga = \frac{{gt}_{0}^{2} - 2 h}{2_{x_{0}}}

The formula that Here it is requires.

The angle substitution (1) of calculating, (2) formula just can be obtained height.

Certainly, we can do one corresponding to the circuit of above formula or obtain the angle of trajectory of ammunition with the method for programming.

Shown in figure (3), can calculate the ammunition arc length of movement locus aloft with following computing formula, the displacement x 0 of time t0 that known ammunition moves from the throw point to the pick-up point and ammunition motion, know by these two conditions, the initial velocity V0 when ammunition is dished out and when dishing out the relational expression between the angle a on initial velocity and ground be:

V0?t0?COS?a＝x0

But can not determine that concrete initial velocity V0 is much, because direction the unknown of initial velocity V0 and initial velocity in this problem.

Present known conditions can not be obtained parabolical equation, also can't obtain length of a curve, must add a condition.

This condition can be the height of the bead of any displacement place, but all is to provide the height of bead at the neutral displacement place generally, promptly

The height h. of the bead at x0/2 place

If condition satisfies, then parabolical equation might as well be made as: y=PX ²+ qX

It can't be otherwise for this equation, and p, q are known numbers, can be drawn by known conditions.

y(0)＝0，y(x0/2)＝h，y(x0)＝0

Can draw thus ammunition aloft the arc length expression formula of movement locus be:

S = \frac{1}{a (1 - \frac{b}{\sqrt{1 + b^{2}}})} + aIn [1 + \frac{a_{x_{0}} + b}{\sqrt{1 + {(a_{x_{0}} + b)}^{2}}}] + \frac{1}{a (1 + \frac{b}{\sqrt{1 + b^{2}}})}

+ aIn [1 - \frac{a_{x_{0}} + b}{\sqrt{1 + {(a_{x_{0}} + b)}^{2}}}] - \frac{1}{a (1 - \frac{a_{x_{0}} + b}{\sqrt{1 + {(a_{x_{0}} + b)}^{2}}})}

- \frac{1}{a (1 + \frac{a_{x_{0}} + b}{\sqrt{1 + {(a_{x_{0}} + b)}^{2}}})} - aIn [1 - \frac{b}{\sqrt{1 + b^{2}}}]

aIn [1 + \frac{b}{\sqrt{1 + b^{2}}}]

(annotate: a in the expression formula of arc length, b are the institute's parabolical quadratic term of asking and the coefficient of item once.)

Certainly, we can do one and obtain the ammunition arc length of movement locus aloft corresponding to the circuit of above formula or with the method for programming.

Claims

1. the method for a radio measuring cast distance for throwing sports, it is characterized in that: the secondary machine that carries on this ammunition comprises receiving circuit, selects circuit, change-over circuit, control circuit, radiating circuit, its output terminal connected A2 selection circuit, A3 change-over circuit, radiating circuit successively after receiving circuit received desired signal, and radiating circuit also is connected with control circuit and emitting antenna; Comprise receiving circuit in this main frame, select circuit, change-over circuit, radiating circuit, computation module, display module, its output terminal connected A1 selection circuit and A3 selection circuit respectively after receiving circuit received desired signal, A1 selects circuit output end to connect A2 change-over circuit, radiating circuit, emitting antenna successively, A3 selects circuit output end to connect computation module, display module successively, and computation module also is connected with the radiating circuit of main frame; Be the wireless communication of corresponding coupling between main frame and the secondary machine, between main frame and the secondary machine be rely on, response short pulse co-ordination in steps each other.

2. the method for radio measuring cast distance for throwing sports according to claim 1 is characterized in that: the moment control circuit that this pair machine lands with ammunition produces an A1 short pulse to be launched through radiating circuit, and the receiving circuit of main frame receives immediately; Selecting circuit to filter out the A1 short pulse through A1 is transferred to the A2 change-over circuit and converts the A2 short pulse to, the A2 short pulse is transferred to the radiating circuit of main frame, radiating circuit is divided into two-way with the A2 short pulse: the one tunnel is transferred to the computation module of main frame, launch with the form of wireless wave by emitting antenna on another road, and the receiving circuit of secondary machine receives the A2 short pulse immediately; Select circuit to filter out the A2 short pulse through A2 and be transferred to the A3 change-over circuit and convert the A3 short pulse to, the A3 short pulse is transferred to the radiating circuit of secondary machine to be launched the A3 short pulse through emitting antenna, and the receiving circuit of main frame receives the A3 short pulse immediately; Select circuit to filter out the computation module that the A3 short pulse is transferred to main frame through A3, the computation module of main frame is according to the time difference of A2 short pulse and A3 short pulse and the cast of correlation parameter calculating ammunition at this moment, and last computation module is transferred to display module with result of calculation and shows intuitively.

3. the method for radio measuring cast distance for throwing sports according to claim 1, it is characterized in that: the secondary machine that carries on this ammunition has the control circuit of slipping out of the hand, ammunition produces an A4 short pulse in the moment of slipping out of the hand by the control circuit of slipping out of the hand, through the radiating circuit of secondary machine form the A4 short pulse is transmitted in the air with radiowave, the receiving circuit of main frame receives immediately, is transferred to the computation module of main frame after A4 selects circuit to filter out the A4 short pulse; Described ammunition lands moment, the control circuit of its secondary machine produced the radiating circuit emission of an A1 short pulse through secondary machine, and the receiving circuit of main frame receives immediately; Selecting circuit to filter out the A1 short pulse through A1 is transferred to the A2 change-over circuit and converts the A2 short pulse to, the A2 short pulse is transferred to the radiating circuit of main frame, radiating circuit is divided into two-way with the A2 short pulse: lead up to emitting antenna with the form of radiowave to aerial emission A2 short pulse, another road is transferred to the computation module of main frame, and the computation module of main frame calculates the time difference between A4 short pulse and the A2 short pulse; The receiving circuit of secondary machine receives the A2 short pulse after A2 selects circuit to select the A2 short pulse is transferred to the A3 change-over circuit and converts the A3 short pulse to, described A3 short pulse is transferred to the form emission of the radiating circuit of secondary machine with wireless wave, and the receiving circuit of main frame receives the A3 short pulse immediately; Select circuit to select the computation module that the A3 short pulse is transferred to main frame through A3, the computation module of main frame calculates the time difference between A2 short pulse and the A3 short pulse at this moment; The computation module of last main frame is done a comparison, calculating with the time difference between the time difference between A4 short pulse and the A2 short pulse and A2 short pulse and the A3 short pulse and correlation parameter, the angle of trajectory when calculating ammunition and launching.

4. according to the method for any one described radio measuring cast distance for throwing sports in the claim 1 to 3, it is characterized in that: described A2 change-over circuit and A3 change-over circuit are freq converting circuits.

5. according to the method for any one described radio measuring cast distance for throwing sports in the claim 1 to 3, it is characterized in that: described A2 change-over circuit and A3 change-over circuit are the code conversion circuit.

6. according to the method for any one described radio measuring cast distance for throwing sports in the claim 1 to 3, it is characterized in that: described A1 short pulse, A2 short pulse, A3 short pulse, A4 short pulse are the signals of different frequency, and select circuit, A2 to select circuit, A3 to select circuit, A4 to select circuit correspondence coupling one by one with A1.

7. according to the method for any one described radio measuring cast distance for throwing sports in the claim 1 to 3, it is characterized in that: the short pulse of described A1, A2, A3, A4 is the signal of different coding, and selects circuit, A2 to select circuit, A3 to select circuit, A4 to select circuit correspondence coupling one by one with A1.

8. according to the method for any one described radio measuring cast distance for throwing sports in the claim 1 to 3, it is characterized in that: this A1 short pulse is to be produced by the short pulse generator of secondary machine control circuit.

9. according to the method for any one described radio measuring cast distance for throwing sports in the claim 1 to 3, it is characterized in that: the every throwing of this ammunition once, the control circuit of secondary machine produced A2 short pulse, A3 short pulse that A1 short pulse and A1 short pulse change out and makes response and handle when main frame and secondary machine only landed for the first time to ammunition.

10. the method for radio measuring cast distance for throwing sports according to claim 3 is characterized in that: A4 pulse that this control circuit of slipping out of the hand produces is that a kind of human induction switch and its interlock circuit produce.