CN101778239A - Two-path adaptive radio frequency transmission control system - Google Patents
Two-path adaptive radio frequency transmission control system Download PDFInfo
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- CN101778239A CN101778239A CN 201010111599 CN201010111599A CN101778239A CN 101778239 A CN101778239 A CN 101778239A CN 201010111599 CN201010111599 CN 201010111599 CN 201010111599 A CN201010111599 A CN 201010111599A CN 101778239 A CN101778239 A CN 101778239A
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Abstract
The invention relates to a two-path adaptive radio frequency transmission control system, which is used for listening and watching high-quality programs in a train traveling process and comprises a main line radio frequency signal amplifying device Fq of a broadcast carriage, N two-path adaptive radio frequency signal amplifying devices Fwn of sleeping carriages and 2N cables L2n for redundant transmission of main line radio frequency signals. The main line radio frequency signal amplifying device is provided with four output ports A, B, C and D with equal level; the main line radio frequency signal amplifying device Fq of the broadcast carriage can be in mutual exchanging connection with the front and back positions of the two-path adaptive radio frequency signal amplifying device Fwn of any sleeping carriage or head and tail positions per se; and each two-path adaptive radio frequency signal amplifying device Fwn is provided with four main line radio frequency transmission ports An, Bn, Cn and Dn and a radio frequency output port En. The two-path adaptive radio frequency transmission control system of the invention guarantees normal transmission of radio frequency signals, guarantees the normal transmission of signals and realizes simple and high-efficiency full-automatic transmission.
Description
Technical field
The present invention relates to a kind of two-path adaptive radio frequency transmission control system, be applicable to listen in the train travelling process and watch high-quality program.
Background technology
In increasing train sleeping carriage, passengers wish to access high-quality seeing and hearing enjoyment.And in this comparatively frequent environment of vibration that jolts, guarantee that the reliability and stability of the radio signal transmission of train CATV system become the task of top priority at train, for this reason, railroad is that train CATV system has proposed concrete requirement, requires as follows:
1. every row train has 10 joint sleeping carriages, and every joint sleeping carriage has 36 user terminals.
2. the front end radio diffusion van transmits 12 tunnel TV signal.
3. backbone has two main lines to adopt redundant system, and main line passes from every joint sleeping carriage.
4. every joint sleeping carriage adopts a train CATV amplifying device.
The position of 5. every joint sleeping carriage can arbitrarily be changed.
6. the position of radio diffusion van can arbitrarily be changed.
The special-purpose CATV amplifying device of existing train is a product of going up the special Electronics Co., Ltd. of sea cowry, and its shortcoming is the transmission direction that comes switching signal with hand switch, not only poor efficiency but also waste of manpower.
Summary of the invention
The purpose of this invention is to provide a kind of two-path adaptive radio frequency transmission control system, solved owing to the position of the position in broadcasting for train compartment and the every joint sleeping carriage uncertainty of the fixing radio signal transmission direction of bringing, and because the trunk cable joint loosening not smooth problem of a certain main signal transmission that causes in somewhere realizes that simply again the two-way radiofrequency signal automaticallyes switch and non-directional main line redundant transmission efficiently.
The object of the present invention is achieved like this, a kind of two-path adaptive radio frequency transmission control system comprises main line radio frequency signal amplifying device Fq, the two-path adaptive radio frequency amplifying device Fwn of a N sleeping carriage in a broadcasting compartment and the cable L of 2N main line radiofrequency signal redundant transmission
2nThe main line radio frequency signal amplifying device such as has at four road output port A of level, B, C and D, its middle port A and B are left side main line radio frequency delivery outlet, port C and D are right side main line radio frequency delivery outlet, the main line radio frequency signal amplifying device Fq in broadcasting compartment can exchange with any one front and back position that saves the two-path adaptive radio frequency amplifying device Fwn of sleeping carriage and be connected, the main line radio frequency signal amplifying device Fq in broadcasting compartment can exchange mutually and is connected with self head and the tail position of the two-path adaptive radio frequency amplifying device Fwn of any joint sleeping carriage, each two-path adaptive radio frequency amplifying device Fwn has four main line radio frequency transmission port An, Bn, Cn, Dn and a radio-frequency (RF) output end mouth En, each two-path adaptive radio frequency amplifying device Fwn can be arbitrarily be connected by cable Ln with the two-path adaptive radio frequency amplifying device Fwn of adjacent sleeping carriage or the main line radio frequency signal amplifying device Fq in broadcasting compartment, and the radio-frequency (RF) output end mouth En of each two-path adaptive radio frequency amplifying device Fwn is connected with the user terminal of this section sleeping carriage.
Two-path adaptive radio frequency amplifying device Fwn of the present invention is by the radio frequency commutation circuit, the detection signal amplifying circuit, the A/D change-over circuit, channel control circuit, the channel status display circuit, the automatic/hand status display circuit, port is selected hand push button PC, automatic/hand switching push button A/M and single-chip microcomputer treatment circuit are formed, the main line radio frequency signal amplifying device in the two-path adaptive radio frequency amplifying device of radio frequency commutation circuit and adjacent sleeping carriage or broadcasting compartment, the detection signal amplifying circuit is connected with channel control circuit, the detection signal amplifying circuit is connected with the A/D change-over circuit, single-chip microcomputer treatment circuit and A/D change-over circuit, channel control circuit, the channel status display circuit, the automatic/hand status display circuit, port selects hand push button PC to be connected with automatic/hand switching push button A/M.
Radio frequency commutation circuit of the present invention is by the coil FZ1 of branch, FZ2, FZ3, FZ4, FZ5, relay J
a, J
b, J
c, J
d, J
e, detector diode I
A, I
B, I
C, I
D, I
E, amplification module AMP and two distributor FP1, FP2 form, the input of the coil FZ1 of branch, FZ2, FZ3, FZ4 is connected with port An, Bn, Cn, Dn respectively, port An, Bn are connected with the corresponding port in last joint sleeping carriage or broadcasting compartment, Cn, Dn are connected with the following corresponding port in joint sleeping carriage or broadcasting compartment, the branch end of the coil FZ1 of branch, FZ2, FZ3 and FZ4 respectively with detector diode I
A, I
B, I
CAnd I
DAnode connect detector diode I
A, I
B, I
CAnd I
DNegative electrode port V
AJ, V
BJ, V
CJAnd V
DJWith detect amplifying circuit and be connected, the output of the coil FZ1 of branch, FZ2, FZ3 and FZ4 respectively with relay J
a, J
b, J
cAnd J
dThe public contact a that switches of radio frequency
o, b
o, c
oAnd d
oConnect relay J
aAnd J
bContact a
2And b
2Respectively with relay J
cAnd J
dContact c
1And d
1Connect relay J
aAnd J
bContact a
1And b
1Respectively with relay J
cAnd J
dContact c
2And d
2Connect relay J
eContact e
1With relay J
aContact a
1And relay J
cContact c
2Connect relay J
eContact e
2With relay J
bContact b
1And relay J
dContact d
2Connect relay J
eThe public contact e that switches of radio frequency
oConnect the input of amplification module AMP, the input of the output termination branch line circle FZ5 of amplification module AMP, the termination detector diode I of branch of the coil FZ5 of branch
EAnode, detector diode I
ENegative electrode with detect amplifying circuit and be connected, this machine output port En is connected with the user terminal of this section sleeping carriage, the input of the output termination two distributor FP1 of the coil FZ5 of branch, this machine of output termination output port En of two distributor FP1, the input of another output termination two distributor FP2 of two distributor FP1, the output of two distributor FP2 and relay J
aContact a
2And relay J
cContact c
1Connect another output and the relay J of two distributor FP2
bContact b
2And relay J
dContact d
1Connect relay J
a, J
b, J
c, J
dAnd J
eControl pin Vak, Vbk, Vck and Vek be connected with channel control circuit.
Detection signal amplifying circuit of the present invention is made up of chip IC 4, IC7, resistance R 14-R18, R22-R26,10,12,5,3 pin of chip IC 4 respectively with the radio frequency commutation circuit in detector diode I
A, I
B, I
C, I
DNegative electrode port V
AJ, V
BJ, V
CJ, V
DJConnect, 13 pin of chip IC 4 are connected with the end of resistance R 18 and R26,9 pin of chip IC 4 are connected with the end of resistance R 17 and R25,6 pin of chip IC 4 are connected with the end of resistance R 14 and R22,2 pin of chip IC 4 are connected with the end of resistance R 15 and R23,2 pin of chip IC 7 are connected with the end of resistance R 16 and R24,5 pin of the chip IC 2 of another termination A/D change-over circuit of 14 pin of chip IC 4 and resistance R 18,6 pin of the chip IC 2 of another termination A/D change-over circuit of 8 pin of chip IC 4 and resistance R 17,7 pin of the chip IC 2 of another termination A/D change-over circuit of 7 pin of chip IC 4 and resistance R 14,8 pin of the chip IC 2 of another termination A/D change-over circuit of 1 pin of chip IC 4 and resistance R 15,9 pin of the chip IC 2 of another termination A/D change-over circuit of 1 pin of chip IC 7 and resistance R 16,4 pin of chip IC 4 and 8 pin of chip IC 7 meet DC power supply VCC, the other end of resistance R 22-R26,4 pin common grounds of 11 pin of chip IC 4 and chip IC 7.
Single-chip microcomputer treatment circuit of the present invention is by single-chip microcomputer IC1, chip IC 3, resistance R 27, R28, capacitor C 61, C62 and crystal oscillator XTAL1 form, resistance R 27, the end of R28 and 8 pin of chip IC 3 meet DC power supply VCC, 3 pin of another termination chip IC 3 of resistance R 27,7 pin of the other end of resistance R 28 and chip IC 3 connect 9 pin of single-chip microcomputer IC1,1 of chip IC 3,2,5,6 pin meet 1 of single-chip microcomputer IC1 respectively, 2,4,3 pin, 19 pin of one termination single-chip microcomputer IC1 of the end of crystal oscillator XTAL1 and capacitor C 61,18 pin of one termination single-chip microcomputer IC1 of the other end of crystal oscillator XTAL1 and capacitor C 62,5 of single-chip microcomputer IC1,6,7,8 pin connect the A/D change-over circuit, 16 of single-chip microcomputer IC1,17 pin are connected road control command circuit, 24 of single-chip microcomputer IC1,25,26,27 pin are connected the road status display circuit, 28 pin of single-chip microcomputer IC1 connect the automatic/hand status display circuit, 38 of single-chip microcomputer IC1,39 pin connect port respectively and select hand push button PC and automatic/hand switching push button A/M.
Channel control circuit of the present invention is by chip IC 5, IC6 forms, 2 pin of chip IC 5 and 6 pin of chip IC 6 meet the control pin Vak of radio frequency commutation circuit, 12 pin of chip IC 5 and 8 pin of chip IC 6 meet the control pin Vbk of radio frequency commutation circuit, 4 of chip IC 5,6 pin meet the control pin Vck of radio frequency commutation circuit, 8 of chip IC 5,10 pin meet the control pin Vdk of radio frequency commutation circuit, 2 of chip IC 6,4 pin meet the control pin Vek of radio frequency commutation circuit, 11 of chip IC 6,13 pin meet 17 of single-chip microcomputer IC1 in the single-chip microcomputer treatment circuit respectively, 16 pin, 1 of chip IC 5,3,5,9,11,5 of 13 pin and chip IC 6,9,10 pin connect, 1 of chip IC 6,3,12 pin connect.
The invention solves because the position in broadcasting compartment is unfixing, so the radiofrequency signal from main line might enter from the left side or the right side of sleeping carriage two-path adaptive radio frequency amplifying device, in order to guarantee the normal transmission of radiofrequency signal, the two-path adaptive radio frequency amplifying device adopts single-chip microcomputer to control the transmission direction of switching signal automatically; Because backbone has two main lines to adopt redundant system, when one road main line somewhere cable joint is loosening when impelling the main line radiofrequency signal to break, the two-path adaptive radio frequency amplifying device can automatically switch to another road, thereby guarantees the normal transmission of signal; Since at the special-purpose CATV of train system, can be in order to avoid debugging realizes simply again automatically transmission efficiently.
Description of drawings
Fig. 1 is a structure principle chart of the present invention.
Fig. 2 is a radio frequency commutation circuit of the present invention, radiofrequency signal flow process and switching state schematic diagram when the main line radiofrequency signal is imported on the left of sleeping carriage.
Fig. 3 is a radio frequency commutation circuit of the present invention, radiofrequency signal flow process and switching state schematic diagram when the main line radiofrequency signal is imported from the sleeping carriage right side.
Fig. 4 is the theory diagram of detection signal amplifying circuit, A/D change-over circuit, channel control circuit, single-chip microcomputer treatment circuit, channel status display circuit, automatic/hand status display circuit, port selection hand push button and automatic/hand switching push button.
Fig. 5 is detection signal amplifying circuit and A/D change-over circuit schematic diagram.
Fig. 6 is single-chip microcomputer treatment circuit, channel status display circuit and automatic/hand status display circuit schematic diagram.
Fig. 7 is the channel control circuit schematic diagram.
Fig. 8 is inner installation form of two-path adaptive radio frequency amplifying device and regulation and control explanation schematic diagram.
Embodiment
Referring to Fig. 1, structure principle chart.Fq is broadcasting compartment radio frequency amplification apparatus, and it such as has at four road output port A, B, C, the D of level, and its middle port A, B are left side main line radio-frequency (RF) output end mouth, and port C, D are right side main line radio-frequency (RF) output end mouth.Fw1, Fw2, Fw3, Fw4, Fwn is a sleeping carriage two-path adaptive radio frequency amplifying device, they have four main line radio frequency transmission port An (n=1 respectively, 2,3, n), Bn (n=1,2,3, n), Cn (n=1,2,3, n), Dn (n=1,2,3, n), and have this machine radio-frequency (RF) output end mouth En (n=1 respectively, 2,3, n), An wherein, Bn is a left side main line prevention at radio-frequency port, Cn, Dn is a right side main line prevention at radio-frequency port, and the output signal of port En is assigned to 36 user terminals of this section sleeping carriage; When sleeping carriage is positioned at broadcasting compartment when left side, then will to make its four main line prevention at radio-frequency port be arranged to Cn, Dn automatically be that input port and An, Bn are output port to this sleeping carriage two-path adaptive radio frequency amplifying device; On the contrary, when sleeping carriage is positioned at broadcasting during the right side, compartment, then will to make its four main line prevention at radio-frequency port be arranged to An, Bn automatically be that input port and Cn, Dn are output port to this sleeping carriage two-path adaptive radio frequency amplifying device.L1, L2, L3 ... L2n is between the adjacent sleeping carriage and is used for the cable of main line radiofrequency signal redundant transmission between broadcasting compartment and the adjacent sleeping carriage, they get up butt joint in twos before and after the main line prevention at radio-frequency port of adjacent radio frequency amplification apparatus respectively, assurance still can save the sleeping carriage transmission to next after passing through the two-path adaptive radio frequency amplifying device of every joint sleeping carriage from the radiofrequency signal of broadcasting compartment radio frequency amplification apparatus.Broadcasting compartment (radio frequency amplification apparatus Fq is equipped with in inside) can be exchanged mutually with the front and back position of any joint sleeping carriage (two-path adaptive radio frequency amplifying device Fwn is equipped with in inside), the head and the tail position also can be exchanged mutually before and after self compartment in broadcasting compartment and any joint compartment, two-path adaptive radio frequency transmission control system can both guarantee that the user terminal of each sleeping carriage receives high-quality CATV program, makes train main line radiofrequency signal redundant transmission that reliable assurance has been arranged simultaneously.
Referring to Fig. 2, when the main line radiofrequency signal is imported on the left of the two-path adaptive radio frequency amplifying device, two-path adaptive radio frequency amplifying device internal radio frequency signal flow and switching state schematic diagram.When the main line radiofrequency signal is imported on the left of the two-path adaptive radio frequency amplifying device, the detector diode I at port An and Bn place
A, I
BBifurcations from the coil FZ1 of branch, FZ2 detects aanalogvoltage V respectively
AJAnd V
BJ, through detecting amplifying circuit signal is amplified back arrival A/D analog to digital conversion circuit, send to single-chip microcomputer at last, after judging, single-chip microcomputer sends the passage control command, relay J
a, J
b, J
c, J
dControl pin Vak, Vbk, Vck, Vdk be subjected to high level control simultaneously, thereby cause relay at J
a, J
b, J
c, J
dThe contact of conducting simultaneously a
0-a
1, b
0-b
1, c
0-c
1, d
0-d
1Connect four radio-frequency transmission channels, the side signal transmission of four main line prevention at radio-frequency port is to being set to about this moment: left side An and Bn are input, and right side Cn and Dn are output.This moment, single-chip microcomputer provided relay J
eControl pin Vek level be high level, relay J
eContact e
0-e
1Connection is switched on radio-frequency transmission channels, so pass through delivery outlet, the relay J of the coil FZ1 of branch successively from the main line radio-frequency input signals of port An
aContact a
0-a
1, relay J
eContact e
0-e
1After the radio-frequency transmission channels, pour into amplification module AMP, signal arrives the coil FZ5 of branch after AMP amplifies, if pass through detector diode I in the bifurcations of FZ5
EDetected high level V
EJ, the signal that the then definite port An of single-chip microcomputer is amplification module AMP pours into mouth, no longer the signal of detection port Bn; If the bifurcations at FZ5 is passed through detector diode I
EDetection is less than high level V
EJ, single-chip microcomputer is with control relay J
eControl pin Vek level be low level, make relay J
eContact e
0-e
2Connect radio-frequency transmission channels be switched on, then from the main line radio-frequency input signals of port Bn successively through delivery outlet, the relay J of the coil FZ2 of branch
bContact b
0-b
1, relay J
eContact e
0-e
2After the radio-frequency transmission channels, pour into amplification module AMP, signal arrives the coil FZ5 of branch after AMP amplifies, again by detecting V
EJThe having or not of high level, judge that amplification module AMP output has no signal, if signal is arranged, determine that then port Bn is that the signal of amplification module AMP pours into mouth, if no signal shows that then port An and Bn do not have input signal.As long as in port An and the Bn two-way arbitrary road input signal is arranged, perhaps two-way has signal simultaneously, the road signal that single-chip microcomputer will be controlled wherein pours into amplification module AMP, signal after AMP amplifies enters two distributor FP1 by the delivery outlet of FZ5, the road output signal of FP1 arrives this machine output port En, and directly 36 user terminals for this section sleeping carriage provide CATV signal; Another road output signal of two distributor FP1 through two distributor FP2 after, be divided into the two-way output signal, the road output signal of two distributor FP2 is passed through relay J successively
cContact c
0-c
1Radio-frequency transmission channels, the coil FZ3 of branch after, arrive main line radio-frequency (RF) output end mouth Cn; Another road output signal of two distributor FP2 is passed through relay J successively
dContact d
0-d
1Radio-frequency transmission channels, the coil FZ4 of branch after, arrive main line radio frequency output Dn.
Referring to Fig. 3, when the main line radiofrequency signal is imported from two-path adaptive radio frequency amplifying device right side, two-path adaptive radio frequency amplifying device internal radio frequency signal flow and switching state schematic diagram.When the main line radiofrequency signal is imported from two-path adaptive radio frequency amplifying device right side, the detector diode I at port Cn and Dn place
C, I
DBifurcations from the coil FZ3 of branch, FZ4 detects aanalogvoltage V respectively
CJAnd V
DJ, through detecting amplifying circuit signal is amplified back arrival A/D analog to digital conversion circuit, send to single-chip microcomputer at last, after judging, single-chip microcomputer sends the passage control command, relay J
a, J
b, J
c, J
dControl pin Vak, Vbk, Vck, Vdk be subjected to low level control simultaneously, thereby cause relay at J
a, J
b, J
c, J
dThe contact of conducting simultaneously a
0-a
2, b
0-b
2, c
0-c
2, d
0-d
2Connect four radio-frequency transmission channels, the side signal transmission of four main line prevention at radio-frequency port is to being set to about this moment: right side Cn and Dn are input, and left side An and Bn are output.This moment, single-chip microcomputer provided relay J
eControl pin Vek level be high level, relay J
eContact e
0-e
1Connection is switched on radio-frequency transmission channels, so pass through delivery outlet, the relay J of the coil FZ3 of branch successively from the main line radio-frequency input signals of port Cn
cContact c
0-c
2, relay J
eContact e
0-e
1After the radio-frequency transmission channels, pour into amplification module AMP, signal arrives the coil FZ5 of branch after AMP amplifies, if pass through detector diode I in the bifurcations of FZ5
EDetected high level V
EJ, the signal that the then definite port Cn of single-chip microcomputer is amplification module AMP pours into mouth, no longer the signal of detection port Dn; If the bifurcations at FZ5 is passed through detector diode I
EDetection is less than high level V
EJ, single-chip microcomputer is with control relay J
eControl pin Vek level be low level, make relay J
eContact e
0-e
2Connect radio-frequency transmission channels be switched on, then from the main line radio-frequency input signals of port Dn successively through delivery outlet, the relay J of the coil FZ4 of branch
dContact d
0-d
2, relay J
eContact e
0-e
2After the radio-frequency transmission channels, pour into amplification module AMP, signal arrives the coil FZ5 of branch after AMP amplifies, again by detecting V
EJThe having or not of high level, judge that amplification module AMP output has no signal, if signal is arranged, determine that then port Dn is that the signal of amplification module AMP pours into mouth, if no signal shows that then port Cn and Dn do not have input signal.As long as in port Cn and the Dn two-way arbitrary road input signal is arranged, perhaps two-way has signal simultaneously, the road signal that single-chip microcomputer will be controlled wherein pours into amplification module AMP, signal after AMP amplifies enters two distributor FP1 by the delivery outlet of FZ5, the road output signal of FP1 arrives this machine output port En, and directly 36 user terminals for this section sleeping carriage provide CATV signal; Another road output signal of two distributor FP1 through two distributor FP2 after, be divided into the two-way output signal, the road output signal of two distributor FP2 is passed through relay J successively
aContact a
0-a
2Radio-frequency transmission channels, the coil FZ1 of branch after, arrive main line radio-frequency (RF) output end mouth An; Another road output signal of two distributor FP2 is passed through relay J successively
bContact b
0-b
2Radio-frequency transmission channels, the coil FZ2 of branch after, arrive main line radio frequency output Bn.
Referring to Fig. 4, detection signal amplifying circuit, A/D change-over circuit, channel control circuit, single chip machine controlling circuit, channel status display circuit, automatic/hand status display circuit, port are selected the theory diagram of hand push button and automatic/hand switching push button.Aanalogvoltage V in the radio frequency commutation circuit
AJ, V
BJ, V
CJ, V
DJAnd V
EJBe connected with the detection signal amplifying circuit, the detection signal amplifying circuit is connected with the A/D change-over circuit, single-chip microcomputer treatment circuit and A/D change-over circuit, channel control circuit, channel status display circuit, automatic/hand status display circuit, port select hand push button PC to be connected with automatic/hand switching push button A/M, and channel control circuit is connected with control pin Vak, Vbk, Vck, Vdk and Vek in the radio frequency commutation circuit.
Referring to Fig. 5, detection signal amplifying circuit and A/D change-over circuit schematic diagram.The detected aanalogvoltage VAJ of detector diode IE, VBJ, VCJ, VDJ and VEJ from detector diode IA, IB, IC, ID and the RF Amplifier Module output of four main line prevention at radio-frequency port An of two-path adaptive radio frequency amplifying device among Fig. 2 and Fig. 3, Bn, Cn, Dn are sent to chip IC 4 and IC7 respectively, amplified analog signal is sent to chip IC 2 respectively and carries out A/D (mould/number) conversion, and chip IC 2 sends to single-chip microcomputer to data again and handles.Four pins 15,16,17 of chip IC 2 are connected with 8 with the pin 5,6,7 of the corresponding mark of single-chip microcomputer on Fig. 6 respectively with 18.Chip IC 4 is LM324, and chip IC 7 is LM358, and chip IC 2 is TLC1543.The A/D change-over circuit is a chip IC 2, and 14,20 pin of chip IC 2 meet DC power supply VCC, 10,13 pin common grounds of chip IC 2.
Referring to Fig. 6.Single-chip microcomputer IC1 handles according to the data that chip IC 2 is sent, and sends the passage control command then; Single-chip microcomputer IC1 sends the passage control command by two pins 16 and 17, and output 1 (high level) or 0 (low level) signal send instruction to two six reverser chip IC 5 in the channel control circuit and IC6; Light-emitting diode D1, D2, D3, D4 and resistance R 31, R32, R33, R34 forms the channel status display circuit, light-emitting diode D1, D2, D3, the negative electrode of D4 meets 24 of single-chip microcomputer IC1 respectively, 25,26,27 pin, light-emitting diode D1, D2, D3, the anode of D4 is connecting resistance R31 respectively, R32, R33, the end of R34, resistance R 31, R32, R33, the other end of R34 meets DC power supply VCC jointly, as light-emitting diode D1, D2, D3, when D4 is lighted respectively, the main line prevention at radio-frequency port An that shows the two-path adaptive radio frequency amplifying device, Bn, Cn, the signal that Dn is taken as RF Amplifier Module AMP respectively pours into port, light-emitting diode D1, D2, D3, D4 is respectively green light A, green light B, green light C, green light D.Light-emitting diode D5 and resistance R 35 are formed the automatic/hand status display circuit, light-emitting diode D5 is green light A/M, the negative electrode of light-emitting diode D5 connects 28 pin of single-chip microcomputer IC1, the end of the anode connecting resistance R35 of light-emitting diode D5, another termination DC power supply VCC of resistance R 35.The end ground connection of automatic/hand switching push button A/M, its other end connects 39 pin of single-chip microcomputer IC1 and an end of resistance R 30, port is selected the end ground connection of hand push button PC, its other end is connected with 38 pin of single-chip microcomputer IC1 and an end of resistance R 29, and the other end of resistance R 29, R30 meets DC power supply VCC jointly.When continuous flicking automatic/hand switching push button A/M, light-emitting diode D5 can change under " lighting " and " knocking out " two states, " light " expression two-path adaptive radio frequency amplifying device and enter automatic detection and switching state, " knocking out " expression two-path adaptive radio frequency amplifying device enters manual state of a control; Under the state that light-emitting diode D5 " knocks out ", if continuously the flicking port is selected hand push button PC, then light-emitting diode D1, D2, D3, D4 can be moved in circles by " lighting " in turn, and this is used for before the product export debugging to each port radio-frequency technique index.Single-chip microcomputer IC1 is AT89C52, and chip IC 3 is X25043.
Referring to Fig. 7, channel control circuit.Single-chip microcomputer IC1 sends the passage control command by two pins 16 (WR) and 17 (RD), output 1 (high level) or 0 (low level) signal, arrive chip IC 5, IC6, chip IC 5, IC6 are 74H,C04 six reversers, two chip IC 5, IC6 move through a series of not gates, and channel control circuit is five relay J among Fig. 2 and Fig. 3
a, J
b, J
c, J
d, J
eControl pin control voltage Vak, Vbk, Vck, Vdk, Vek are provided respectively, the reasonable switching of control relay radio-frequency channel, thus guarantee two-path adaptive radio frequency amplifying device operate as normal.
Referring to Fig. 8.
1. automatic/hand switching push button A/M: if give the button a slight press A/M continuously, then green light A/M can change under " lighting " and " knocking out " two states.
2. green light A/M: the bright expression two-path adaptive radio frequency of lamp amplifying device enters automatic detection and switching state; Lamp goes out and represents that the two-path adaptive radio frequency amplifying device enters manual state of a control.
3. port is selected hand push button PC: under the state that green light A/M " knocks out ", if give the button a slight press PC continuously, then green light A, B, C, D can be lighted in turn, move in circles this preceding debugging to each port radio-frequency technique index that is used to dispatch from the factory.
4. green light A, B, C, D: when lamp is lighted successively, represent that respectively the signal that main line prevention at radio-frequency port An, Bn, Cn, Dn are taken as amplification module AMP pours into port;
1.. if green light A or B are lighted, then main line prevention at radio-frequency port An or Bn are as the signal input of amplification module, and main line prevention at radio-frequency port Cn and Dn are as the main line radio-frequency (RF) output end mouth of two-path adaptive radio frequency amplifying device;
2.. if green light C or D are lighted, then main line prevention at radio-frequency port Cn or Dn pour into port as the signal of amplification module AMP, and main line prevention at radio-frequency port An and Bn are as the main line radio-frequency (RF) output end mouth of two-path adaptive radio frequency amplifying device.
5. red light LED: the bright expression amplification module of lamp AMP operating voltage is normal.
6. the present invention's button A/M is set to automatic control state, promptly when native system is sealed in train CATV system and normal power supply, indicator light A/M is lighted, the two-path adaptive radio frequency amplifying device can detect four main line prevention at radio-frequency port An, Bn, Cn, Dn automatically, and will wherein there be road signal in two ports of signal to pour into amplification module AMP, and do not have two ports of signal to be set to the main line output port of amplification module AMP; The radio-frequency (RF) output end mouth En of two-path adaptive radio frequency amplifying device provides CATV signal for 36 user terminals of this section sleeping carriage.
7. if 12 channels of front end have signal simultaneously, and radio diffusion van main line radio frequency signal amplifying device saves with each, and cable (7 types, 75 Ω) length is all 30 meters between the adjacent compartment two-path adaptive radio frequency amplifying device, advise that then two-path adaptive radio frequency amplifying device incoming level is 93dB μ V (47MHz)/90dB μ V (550MHz), two-path adaptive radio frequency amplifying device incoming level allows mobility scale to be ± 6dB.The smooth output level of suggestion main line radio frequency signal amplifying device is 102dB μ V (after one four distribution of output termination, connecing trunk cable again), then respectively saves compartment this machine of two-path adaptive radio frequency amplifying device output level about 98dB μ V.
Claims (6)
1. two-path adaptive radio frequency transmission control system, it is characterized in that comprising the main line radio frequency signal amplifying device Fq in a broadcasting compartment, the cable L2n of the two-path adaptive radio frequency amplifying device Fwn of N sleeping carriage and 2N main line radiofrequency signal redundant transmission, the main line radio frequency signal amplifying device such as has at four road output port A of level, B, C and D, its middle port A and B are left side main line radio frequency delivery outlet, port C and D are right side main line radio frequency delivery outlet, the main line radio frequency signal amplifying device Fq in broadcasting compartment can exchange with any one front and back position that saves the two-path adaptive radio frequency amplifying device Fwn of sleeping carriage and be connected, the main line radio frequency signal amplifying device Fq in broadcasting compartment can exchange mutually and is connected with self head and the tail position of the two-path adaptive radio frequency amplifying device Fwn of any joint sleeping carriage, each two-path adaptive radio frequency amplifying device Fwn has four main line radio frequency transmission port An, Bn, Cn, Dn and a radio-frequency (RF) output end mouth En, each two-path adaptive radio frequency amplifying device Fwn can be arbitrarily be connected by cable Ln with the two-path adaptive radio frequency amplifying device Fwn of adjacent sleeping carriage or the main line radio frequency signal amplifying device Fq in broadcasting compartment, and the radio-frequency (RF) output end mouth En of each two-path adaptive radio frequency amplifying device Fwn is connected with the user terminal of this section sleeping carriage.
2. two-path adaptive radio frequency transmission control system according to claim 1, it is characterized in that described two-path adaptive radio frequency amplifying device Fwn is by the radio frequency commutation circuit, the detection signal amplifying circuit, the A/D change-over circuit, channel control circuit, the channel status display circuit, the automatic/hand status display circuit, port is selected hand push button PC, automatic/hand switching push button A/M and single-chip microcomputer treatment circuit are formed, the main line radio frequency signal amplifying device in the two-path adaptive radio frequency amplifying device of radio frequency commutation circuit and adjacent sleeping carriage or broadcasting compartment, the detection signal amplifying circuit is connected with channel control circuit, the detection signal amplifying circuit is connected with the A/D change-over circuit, single-chip microcomputer treatment circuit and A/D change-over circuit, channel control circuit, the channel status display circuit, the automatic/hand status display circuit, port selects hand push button PC to be connected with automatic/hand switching push button A/M.
3. two-path adaptive radio frequency transmission control system according to claim 2 is characterized in that described radio frequency commutation circuit is by the coil FZ1 of branch, FZ2, FZ3, FZ4, FZ5, relay J
a, J
b, J
c, J
d, J
e, detector diode I
A, I
B, I
C, I
D, I
E, amplification module AMP and two distributor FP1, FP2 form, the input of the coil FZ1 of branch, FZ2, FZ3, FZ4 is connected with port An, Bn, Cn, Dn respectively, port An, Bn are connected with the corresponding port in last joint sleeping carriage or broadcasting compartment, Cn, Dn are connected with the following corresponding port in joint sleeping carriage or broadcasting compartment, the branch end of the coil FZ1 of branch, FZ2, FZ3 and FZ4 respectively with detector diode I
A, I
B, I
CAnd I
DAnode connect detector diode I
A, I
B, I
CAnd I
DNegative electrode port V
AJ, V
BJ, V
CJAnd V
DJWith detect amplifying circuit and be connected, the output of the coil FZ1 of branch, FZ2, FZ3 and FZ4 respectively with relay J
a, J
b, J
cAnd J
dThe public contact a that switches of radio frequency
o, b
o, c
oAnd d
oConnect relay J
aAnd J
bContact a
2And b
2Respectively with relay J
cAnd J
dContact c
1And d
1Connect relay J
aAnd J
bContact a
1And b
1Respectively with relay J
cAnd J
dContact c
2And d
2Connect relay J
eContact e
1With relay J
aContact a
1And relay J
cContact c
2Connect relay J
eContact e
2With relay J
bContact b
1And relay J
dContact d
2Connect relay J
eThe public contact e that switches of radio frequency
oConnect the input of amplification module AMP, the input of the output termination branch line circle FZ5 of amplification module AMP, the termination detector diode I of branch of the coil FZ5 of branch
EAnode, detector diode I
ENegative electrode with detect amplifying circuit and be connected, this machine output port En is connected with the user terminal of this section sleeping carriage, the input of the output termination two distributor FP1 of the coil FZ5 of branch, this machine of output termination output port En of two distributor FP1, the input of another output termination two distributor FP2 of two distributor FP1, the output of two distributor FP2 and relay J
aContact a
2And relay J
cContact c
1Connect another output and the relay J of two distributor FP2
bContact b
2And relay J
dContact d
1Connect relay J
a, J
b, J
c, J
dAnd J
eControl pin Vak, V
Bk, V
Ck, and V
EkBe connected with channel control circuit.
4. two-path adaptive radio frequency transmission control system according to claim 2, it is characterized in that described detection signal amplifying circuit is made up of chip IC 4, IC7, resistance R 14-R18, R22-R26,10,12,5,3 pin of chip IC 4 respectively with the radio frequency commutation circuit in detector diode I
A, I
B, I
C, I
DNegative electrode port V
AJ, V
BJ, V
CJ, V
DJConnect, 13 pin of chip IC 4 are connected with the end of resistance R 18 and R26,9 pin of chip IC 4 are connected with the end of resistance R 17 and R25,6 pin of chip IC 4 are connected with the end of resistance R 14 and R22,2 pin of chip IC 4 are connected with the end of resistance R 15 and R23,2 pin of chip IC 7 are connected with the end of resistance R 16 and R24,5 pin of the chip IC 2 of another termination A/D change-over circuit of 14 pin of chip IC 4 and resistance R 18,6 pin of the chip IC 2 of another termination A/D change-over circuit of 8 pin of chip IC 4 and resistance R 17,7 pin of the chip IC 2 of another termination A/D change-over circuit of 7 pin of chip IC 4 and resistance R 14,8 pin of the chip IC 2 of another termination A/D change-over circuit of 1 pin of chip IC 4 and resistance R 15,9 pin of the chip IC 2 of another termination A/D change-over circuit of 1 pin of chip IC 7 and resistance R 16,4 pin of chip IC 4 and 8 pin of chip IC 7 meet DC power supply VCC, the other end of resistance R 22-R26,4 pin common grounds of 11 pin of chip IC 4 and chip IC 7.
5. two-path adaptive radio frequency transmission control system according to claim 2, it is characterized in that described single-chip microcomputer treatment circuit is by single-chip microcomputer IC1, chip IC 3, resistance R 27, R28, capacitor C 61, C62 and crystal oscillator XTAL1 form, resistance R 27, the end of R28 and 8 pin of chip IC 3 meet DC power supply VCC, 3 pin of another termination chip IC 3 of resistance R 27,7 pin of the other end of resistance R 28 and chip IC 3 connect 9 pin of single-chip microcomputer IC1,1 of chip IC 3,2,5,6 pin meet 1 of single-chip microcomputer IC1 respectively, 2,4,3 pin, 19 pin of one termination single-chip microcomputer IC1 of the end of crystal oscillator XTAL1 and capacitor C 61,18 pin of one termination single-chip microcomputer IC1 of the other end of crystal oscillator XTAL1 and capacitor C 62,5 of single-chip microcomputer IC1,6,7,8 pin connect the A/D change-over circuit, 16 of single-chip microcomputer IC1,17 pin are connected road control command circuit, 24 of single-chip microcomputer IC1,25,26,27 pin are connected the road status display circuit, 28 pin of single-chip microcomputer IC1 connect the automatic/hand status display circuit, 38 of single-chip microcomputer IC1,39 pin connect port respectively and select hand push button PC and automatic/hand switching push button A/M.
6. two-path adaptive radio frequency transmission control system according to claim 2, it is characterized in that described channel control circuit is by chip IC 5, IC6 forms, 2 pin of chip IC 5 and 6 pin of chip IC 6 meet the control pin Vak of radio frequency commutation circuit, 12 pin of chip IC 5 and 8 pin of chip IC 6 meet the control pin Vbk of radio frequency commutation circuit, 4 of chip IC 5,6 pin meet the control pin Vck of radio frequency commutation circuit, 8 of chip IC 5,10 pin meet the control pin Vdk of radio frequency commutation circuit, 2 of chip IC 6,4 pin meet the control pin Vek of radio frequency commutation circuit, 11 of chip IC 6,13 pin meet 17 of single-chip microcomputer IC1 in the single-chip microcomputer treatment circuit respectively, 16 pin, 1 of chip IC 5,3,5,9,11,5 of 13 pin and chip IC 6,9,10 pin connect, 1 of chip IC 6,3,12 pin connect.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101115998A CN101778239B (en) | 2010-02-10 | 2010-02-10 | Two-path adaptive radio frequency transmission control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101115998A CN101778239B (en) | 2010-02-10 | 2010-02-10 | Two-path adaptive radio frequency transmission control system |
Publications (2)
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| CN101778239A true CN101778239A (en) | 2010-07-14 |
| CN101778239B CN101778239B (en) | 2011-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101115998A Active CN101778239B (en) | 2010-02-10 | 2010-02-10 | Two-path adaptive radio frequency transmission control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389740A (en) * | 2013-07-29 | 2013-11-13 | 中国传媒大学 | Control module of parallel type stereoscopic video cloud station |
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| EP1903800A1 (en) * | 2005-07-12 | 2008-03-26 | Mitsubishi Electric Corporation | Train-installed video information delivery control display system |
| CN201118767Y (en) * | 2007-11-23 | 2008-09-17 | 王坤宇 | Device for high-speed data transmission based on mobile transportation tool |
| CN101567731A (en) * | 2009-06-03 | 2009-10-28 | 北京华高世纪科技股份有限公司 | Digital broadcasting system on train and implementation method thereof |
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2010
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1903800A1 (en) * | 2005-07-12 | 2008-03-26 | Mitsubishi Electric Corporation | Train-installed video information delivery control display system |
| CN201118767Y (en) * | 2007-11-23 | 2008-09-17 | 王坤宇 | Device for high-speed data transmission based on mobile transportation tool |
| CN101567731A (en) * | 2009-06-03 | 2009-10-28 | 北京华高世纪科技股份有限公司 | Digital broadcasting system on train and implementation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103389740A (en) * | 2013-07-29 | 2013-11-13 | 中国传媒大学 | Control module of parallel type stereoscopic video cloud station |
| CN103389740B (en) * | 2013-07-29 | 2016-03-23 | 中国传媒大学 | A kind of control module of parallel type stereoscopic video cloud station |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101778239B (en) | 2011-10-19 |
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