CN1063364A

CN1063364A - Graphical representation navigation system installation

Info

Publication number: CN1063364A
Application number: CN91110869A
Authority: CN
Inventors: 吴育刚
Original assignee: Inst Of Forestry Science Of Qiannan Buyi Nationality And Miao Nationality A
Current assignee: Inst Of Forestry Science Of Qiannan Buyi Nationality And Miao Nationality A
Priority date: 1991-11-16
Filing date: 1991-11-16
Publication date: 1992-08-05

Abstract

The present invention is that a kind of high precision wireless electrograph shows navigation system installation, utilizes flow diagram to navigate, and is used for that aircraft scatters seeds and use such as medicine.Load onto the quadruplet radio device respectively on three hilltops and on the aircraft broadcasting near the district, its pulse of sending required time when returning is sent into computing machine, draw the coordinate position of aircraft after the calculating, demonstrate the track of airplane motion on the last TV screen aboard and broadcast the flow diagram that district's boundary Control point is formed.The pilot overcomes the deficiency that present manual guidance aircraft broadcasts sowing operation according to this figure task that fulfils assignment.

Description

Graphical representation navigation system installation

The present invention is that a kind of high precision wireless electrograph shows navigation system installation, utilizes flow diagram to navigate, and is used for uses such as aircraft seeding seed or medicine.

At present, operation navigation is manually to survey and establish signaling point broadcasting ground, district in forestry, and this method has the following disadvantages: 1, broadcast district's signal point position and survey that to establish and discharge signal labour intensity big, work strain; 2, because number of signals is few, waste has been caused in the place that has 20 percent seed and medicine to fail to be sprinkling upon regulation approximately; 3, signal is not easy to be found, and perhaps signal occurs untimely and influences operation; 4, because job procedure is fixed, pilot's the subjective initiative and the advanced feature of aircraft fail to give full play to and utilize.

The objective of the invention is to make installation TV screen aboard will broadcast the shape in district at any time with this device, the position at aircraft place, operation situation and graphics proportion show in schematic form, and this figure is called flow diagram.Accompanying drawing 1 is exactly a flow diagram.The pilot overcomes the deficiency of present manual guidance aircraft seeding operation according to the flow diagram task of fulfiling assignment that just can drive an airplane.And navigation error can be reduced an order of magnitude, reach below 10 meters.

The present invention by be contained in broadcast the district near three hilltops on and aircraft on the quadruplet radio device form.

Fig. 2 is that 3 of structure principle chart A, B, the C of graphical representation navigation system installation broadcasts near three the topped aircrafts of high somes energy in district at the highest hilltop that broadcast district's operation, as the reference point of aircraft location.Have in A point installed device: transmitter 1, receiver 2, time set 3, detecting device 4, computing machine 5, display 6, transposer 7, video tape recorder 8, draught machine 9, disk drive 10.At 8 a transponder 14 is installed, at the C point transponder 15 is installed also, D is the equipment that is equipped with on the aircraft.Transponder 11, sensor 12, TV screen 13.

The time set 3 that A is ordered, under the control of the CLQQ measurement request signal that computing machine 5 sends, send signal F _S(emission control) makes transmitter frequency of 1 emission and the fixing wireless pulse F of pulsewidth _A, time set 3 timing of starting from scratch simultaneously is contained on the D(aircraft) and transponder 11 receives F _AAnswer a fixed-frequency but the dissimilar wireless pulse F of pulsewidth _DAfter, whether pulsewidth reflects aircraft just in operation, F under the effect of sensor 12 _DRepresented aircraft in operation at=1 o'clock, on the contrary F _DRepresented that aircraft was not in operation at ≠ 1 o'clock.

The transponder 14 that B is ordered is received F _DAnswer a frequency and pulsewidth fixing wireless pulse Fe.

The transponder 15 that C is ordered is received F _DAfter, answer a frequency and pulsewidth fixing wireless pulse F _C

The receiver 2 that A is ordered receives F _B, F _C, F _DTime set 3 is delivered in three pulses respectively, respectively the time that these three pulses arrive under the meter.

Receive pulse F _BTime under the counter meter is T _ADBA, promptly electromagnetic wave from the A point through D point, B point to time that A is ordered.

Receive pulse F _CTime under the counter meter is T _ADCA, promptly electromagnetic wave from the A point through D point, C point to time that A is ordered.

Receive pulse F _D, the time under the counter meter is T _ADA, promptly electromagnetic wave through the D point, arrives the time that A is ordered from the A point.

4 couples of F of detecting device _DPulsewidth detect and deposit and be job parameter ZY.

When time set 3 has been deposited T _ADAT _ADBA, T _ADCA(being referred to as the T parameter) three parameters are just sent CZXY(to computing machine 5 and are measured response signal, and expression T parameter measurement finishes.

Computing machine 5 sends OSSZ(reading clock to time set 3 after receiving CLXY) read time set 3 by the CLSJ(measurement data) the T parameter sent of end and from ZY reading operation parameter.After being somebody's turn to do, substitution formula 1 calculates, and obtains the distance of aircraft to each reference point.

OA＝0.5T _ADA-V-0.5△tV

OB＝（T _ADBA-0.5T _ADA）V-（1.5△tV+AB）

OC=(T _ADCA-0.5T _ADA) V-(1.5 △ tV+AC) formula (1)

OA, OB, OC are respectively the distance that the O point is ordered to A point, B point, C in the formula.△ t is that

transponder

11,14,15 sends the delay time between the pulse from receiving pulse, and V is the speed that electromagnetic wave is propagated in air.The distance of AB for ordering to B for the A point, AC is the distance that the A point is ordered to C.

According to solid analytical geometry with OA, OB, OC substitution formula (2)

In the formula: X, Y, X represent the longitude of geographic position coordinate respectively, latitude and sea level elevation.

Subscript A, B, C, D represent the point of diverse location respectively.

(2) (X in the formula _D, Y _D, Z _D) be the location coordinate that aircraft place O is ordered, be unknown number, other are known number, separate (2) formula, can obtain the aircraft O location coordinate (X of ordering aloft _D, Y _D, Z _D).

Computing machine 5 is by major control point E, the F, the G that broadcast the border, district of input in advance then ... longitude, latitude, as (X _E, Y _E), (X _F, Y _F), (X _G, Y _G) ... fasten to plot by a certain percentage at rectangular coordinates and broadcast district's shape synoptic diagram, and aircraft is in the position of broadcasting the district, demonstrate electron image by display 6, the aircraft on the synoptic diagram represents that with the bright spot of motion detecting device 4 has the output of ZY signal, be that aircraft is in operation, the rail track that bright spot moves then is retained, and becomes the synoptic diagram of aircraft operation, no ZY signal output, be aircraft not in operation, the rail track that bright spot moves then disappears.

The same figure that can show two different proportions on the display 6 simultaneously, district's operation overview is broadcast in width of cloth vast scale figure reflection, and another width of cloth small scale drawing reflection aircraft is broadcast district local job situation near the horizontal projection position.

By transposer 7 display 6 shown flow diagrams are forwarded, the operation image can be received and show to the TV screen 13 of installing aboard.

The pilot can carry out operation by the plant seeds by airplane requirement according to the different same flow diagram of above two ratios that TV screen shows aboard.Reach the purpose of pictorial navigation display.

Disk drive 10, draught machine 9, video tape recorder 8 store the loss of data that shutdown caused that prevents fault and necessity to data respectively.Avoid unnecessary replay and broadcast leakage.

Above overall process is to be handled by computing machine 5 automatic control and managements and data management under the support of graphical representation navigation system software.

Claims

1, a kind of graphical representation navigation system installation is made up of the quadruplet radio device that is contained in respectively on three hilltops and the aircraft; It is characterized in that, be contained in the transmitter 1 at the A point hilltop, receiver 2, time set 3, detecting device 4, computing machine 5, display 6, transposer 7, video tape recorder 8, draught machine 9, disk drive 10 is contained in the transponder 14 at the B point hilltop, be contained in the transponder 15 at the C point hilltop, be contained in the transponder 11 on the aircraft D, sensor 12, electromagnetism screen 13.