CN201577087U - Transmit-receive device used for point type responser - Google Patents
Transmit-receive device used for point type responser Download PDFInfo
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- CN201577087U CN201577087U CN2009202606260U CN200920260626U CN201577087U CN 201577087 U CN201577087 U CN 201577087U CN 2009202606260 U CN2009202606260 U CN 2009202606260U CN 200920260626 U CN200920260626 U CN 200920260626U CN 201577087 U CN201577087 U CN 201577087U
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Abstract
The utility model discloses a transmit-receive device used for a point type responser, which aims to solve the technical problems of writing the messages of the point type responser into the point type responser, and reading the messages. The device comprises a transmitting part and a receiving channel, wherein the transmitting part comprises a signal generating circuit, a prefixed power amplifier, a power amplifier, an isolating unit and a transmit-receive antenna, which are connected in sequence; an ASK modulation circuit is connected with the circuit of the power amplifier; and the receiving channel comprises the transmit-receive antenna, the isolating unit, a band pass filtering unit, an FSK demodulation circuit and a difference amplifying shaping circuit, which are connected in sequence. Compared with the prior art, the device adopts the ASK modulation mode to finish wireless data writing at a higher rate; the duplex isolating circuit for transmission and reception is simple and practical; the transmit-receive antenna adopts an LC string and resonantly realizes double frequency band resonance work; and particularly, two resonant tanks are connected in series to the resonant tank for transmission, so as to improve the transmission work band width of the antenna and meet the requirement of fast programming.
Description
Technical field
The utility model relates to a kind of wireless programming device that is used for Chinese train control system dot-mode transponder, particularly a kind of R-T unit of wireless programming device.
Background technology
China train control system CTCS is the visual plant that China railways raising speed railway and Line for Passenger Transportation guarantee train traffic safety, raising operational efficiency.At Chinese high-speed train railway a large amount of dot-mode transponders was installed along the line, has been adopted the embedding structure when these dot-mode transponders dispatch from the factory, and transponder inside did not comprise any legal message this moment.Write so will carry out data to the dot-mode transponder of firm installation, must also can only adopt wireless writing mode, adopt the wireless programming device to finish.This wireless programming device mode with amplitude shift keying ASK when activating dot-mode transponder writes the dot-mode transponder message in the dot-mode transponder, and reads the dot-mode transponder message and carry out verification after programming is finished.Could guarantee to write correct message like this, finally guarantee train traffic safety.R-T unit is the key modules of wireless programming device, its normal operation and operation with direct relation be written in the dot-mode transponder message correctly whether.There is the circuit complexity in the R-T unit of prior art, and it is low to write data rate, the programming overlong time, and environmental suitability is relatively poor, and the too high shortcoming of power consumption.
Summary of the invention
The purpose of this utility model provides a kind of R-T unit that is used for dot-mode transponder, and the technical problem that solve is that the dot-mode transponder message is write wherein so that setpoint frequency is wireless, and reads message be used for verification and check and approve from dot-mode transponder.
The utility model is by the following technical solutions: a kind of R-T unit that is used for dot-mode transponder, and described R-T unit is made up of radiating portion and receive path; Radiating portion is linked in sequence by signal generating circuit, front-located power amplifier, power amplification, isolated location and dual-mode antenna and constitutes, and the ASK modulation circuit connects power amplification circuit; Receive path is linked in sequence by dual-mode antenna, isolated location, bandpass filtering unit, FSK demodulator circuit and difference amplification and rectification circuit and constitutes.
Signal generating circuit of the present utility model is connected to form by crystal oscillator and one five rank LC low pass filter of a high frequency stability, described five rank LC low pass filters are by first inductance, second inductance of serial connection, and the 5th electric capacity, the 6th electric capacity and the 7th electric capacity that are connected between first inductance, one end, first inductance and the second inductance contact, the second inductance other end and the ground are formed.
Front-located power amplifier of the present utility model and power amplification are connected to form by the two stage power field effect transistor, and the front-located power amplifier pipe adopts the 4th power MOS pipe, and power amplifier tube adopts the 5th power MOS pipe.
The tenth inductance that is connected in series between the 39 electric capacity between the 38 electric capacity of the 4th power MOS pipe source electrode of the present utility model, the 38 electric capacity other end and the ground, the 38 electric capacity and the 5th power MOS pipe grid is formed T type matching network, realizes the coupling of the input stage of the output stage of front-located power amplifier pipe and final stage power amplifier pipe; The 49 electric capacity and the 50 electric capacity that are connected between the 13 inductance, the 13 inductance two ends and the ground of the 5th power MOS pipe source electrode are formed π type matching network, finish the output coupling of final stage power amplifier.
ASK modulation circuit of the present utility model is connected and composed by emitter follower, series resonant network, RC filter network; The 32 resistance, the operational amplifier that are serially connected in the operational amplifier positive input constitute emitter follower; The 61 electric capacity, the 35 resistance and the 16 inductance composition series resonant network that is connected in parallel; The 60 series capacitance, the 34 resistance, the 60 series capacitance and the 34 resistance of serial connection) the 59 electric capacity between contact and the ground forms the RC filter network.
Isolated location of the present utility model is made of seven rank elliptic function low pass filters and duplexing buffer circuit; The 62 electric capacity to the 65 electric capacity between the 17 inductance to the 19 inductance, the 17 inductance to the each two ends of 19 inductance and the ground of serial connection are formed seven rank elliptic function low pass filters; The 20 inductance to the 24 inductance and the 74 electric capacity to seven 18 electric capacity are formed duplexing buffer circuit.
Bandpass filtering of the present utility model unit is connected and composed by the 100 electric capacity, input π type attenuation network, five rank band pass filters, series resonance network, output π type attenuation network.
The core devices of FSK demodulating unit of the present utility model is a demodulation chip.
Demodulation chip of the present utility model adopts MC13055.
Dual-mode antenna of the present utility model is made of printed board coil and the coaxial cable coiling that is fixed on the printed board periphery.
The utility model compared with prior art, form R-T unit by radiating portion and receive path, adopting the ASK modulation system to finish the wireless of data with speed faster writes, speed can reach 57600bps even higher, transmitting and receiving duplexing buffer circuit is made up of simple LC device, circuit is simple and practical, dual-mode antenna adopts LC string and resonance to realize the work of two-band resonance, launching two resonant tanks of series connection on the resonant tank especially, improve the emission bandwidth of operation of antenna, thereby guaranteed the requirement of fast programming.
Description of drawings
Fig. 1 is a circuit block diagram of the present utility model.
Fig. 2 is the signal generating circuit schematic diagram of the utility model embodiment.
Fig. 3 is front-located power amplifier, power amplification and the ASK modulation circuit schematic diagram of the utility model embodiment.
Fig. 4 is the isolated location circuit theory diagrams of the utility model embodiment.
Fig. 5 is the utility model embodiment receive path band pass filter circuit schematic diagram.
Fig. 6 is the FSK demodulator circuit schematic diagram of the utility model embodiment.
Fig. 7 is the differential amplifier circuit schematic diagram of the utility model embodiment.
Fig. 8 is the dual-mode antenna schematic diagram of the utility model embodiment.
Specific implementation method
Below in conjunction with drawings and Examples the utility model is described in further detail.As shown in Figure 1, the R-T unit that is used for dot-mode transponder of the present utility model is made up of radiating portion and receive path.Being linked in sequence by signal generating circuit, front-located power amplifier, power amplification, isolated location and dual-mode antenna constitutes radiating portion, and amplitude-shift keying ASK modulation circuit connects power amplification circuit.Be linked in sequence by dual-mode antenna, isolated location, bandpass filtering unit, frequency shift keying fsk demodulator circuit and difference amplification and rectification circuit and constitute receive path.
When this R-T unit is used for that dot-mode transponder carried out wireless programming, signal generating circuit produces the reference signal that high-frequency is stable, be amplified to certain amplitude input power amplifying unit again by front-located power amplifier, output to dual-mode antenna through the transmitting-receiving isolated location again transponder message simultaneously to be written is modulated on the large-signal of power amplification unit in the mode of the speed of 57600bps and ASK after and carry out wireless programming.
When this R-T unit is used to receive verification dot-mode transponder message, after the dot-mode transponder upward signal that dual-mode antenna receives induction passes through isolated location and bandpass filtering unit, be input to the frequency shift keying fsk demodulator circuit, carry out demodulation by the broadband FSK demodulation chip that is exclusively used in high frequency HF frequency range, the output two paths of differential signals handles for the digital decoding unit through dateout behind the difference amplification and rectification circuit.
As shown in Figure 2, signal generating circuit is connected to form by crystal oscillator X1 and one five rank LC low pass filter of a high frequency stability.The 4 pin power supply that DC power supply VDD1 gives crystal oscillator X1 through the 14 inductance L 14,3 pin of crystal oscillator X1 are the 27.095MHz signal with CMOS level form output frequency, frequency stability is ± 50ppm.Be serially connected with between crystal oscillator X1 and the LC low pass filter every the 4th straight capacitor C 4.First inductance L 1, second inductance L 2 by serial connection, the 5th capacitor C 5, the 6th capacitor C 6 and the 7th capacitor C 7 that are connected between first inductance L, 1 one ends, first inductance L 1 and second inductance L, 2 contacts, second inductance L, 2 other ends and the ground are formed five rank LC low pass filters, signal to crystal oscillator X1 output carries out Filtering Processing, exports in the mode of sinusoidal signal then.
As shown in Figure 3, power amplification unit is connected to form by two stage power field effect transistor metal-oxide-semiconductor, and the 27.095MHz signal that prime signal generation unit is imported is amplified to sufficiently high power after isolated location outputs to antenna.The 4th power MOS pipe Q4 is the front-located power amplifier pipe, and the 5th power MOS pipe Q5 is the final stage power amplifier pipe.The tenth inductance L 10 that is connected in series between the 39 capacitor C 39 between the 38 capacitor C 38, the C38 other end that is connected the Q4 source electrode and the ground, C38 and the Q5 grid is formed T type matching networks, realizes the coupling of the input stage of the output stage of front-located power amplifier pipe and final stage power amplifier pipe.The 49 capacitor C 49 and the 50 capacitor C 50 that are connected between the 13 inductance L 13, L13 two ends and the ground of Q5 source electrode are formed π type matching networks, finish the output coupling of final stage power amplifier, and high order harmonic component is had certain inhibition ability.The function of ASK modulation circuit is to be that the message of 57600bps is modulated on the grid of final stage power amplifier with speed, realizes final stage power amplifier output high level ASK modulation signal.The 57600bps message signals is through emitter follower, series resonant network, the RC filter network grid to final stage power amplifier.The 32 resistance R 32, the operational amplifier U1B that are serially connected in operational amplifier U1B positive input constitute emitter follower, the 61 capacitor C the 61, the 35 resistance R 35 and the 16 inductance L 16 composition series resonant network that is connected in parallel, the 59 capacitor C 59 between the 60 series capacitance C60, the 34 resistance R 34, C60 and the R34 contact and the ground of serial connection is formed the RC filter networks.The effect of series resonant network is to present high resistant at the 27.095MHz frequency, prevents that powerful 27.095MHz signal from exerting an influence to the modulation input.
As shown in Figure 4, isolated location comprises the seven rank elliptic function low pass filters of being made up of the 62 electric capacity to the 65 capacitor C 62-C65 between the 17 inductance to the 19 inductance L 17-L19, described inductance two ends and the ground of serial connection, the duplexing buffer circuit that the 20 inductance to the 24 inductance L 20-L24 and the 74 electric capacity to seven 18 capacitor C 74-C78 form.The low pass filter that the 75 electric capacity to the 78 capacitor C 75-C78 between the 21 inductance to the 24 inductance L 21-L24, described inductance rear end and the ground of serial connection form, 4.234MHz and following frequency signal thereof are presented the low-resistance characteristic, the 27.095MHz signal is then presented high resistant, and this partial circuit stops the high-frequency signal of 27.095MHz to enter receive path.The series resonant network that the 20 inductance L 20 and the 74 capacitor C 74 are formed presents the high resistant characteristic at the 4.234MHz frequency, and the 4.234MHz signal that antenna receives on the dot-mode transponder can only transmit along receive path under the obstruct of this circuit.Thereby realize the duplex of the 4.23MHz signal of the 27.095MHz signal of emission and reception is isolated.
As shown in Figure 5, from the signal of isolated location successively through the 100 capacitor C 100 of bandpass filtering unit, input π type attenuation network, five rank band pass filters, series resonance network, output π type attenuation network to the FSK demodulating unit.The 28 inductance to the 32 inductance L 28-L32 and the 101 electric capacity to the 105 capacitor C 101-C105 form five rank band pass filters, to near the signal controlling 4.234MHz decay in 3dB, and to the 27.095MHz signal suppressing more than 60dBc.The input π type attenuation network of forming by the 42 resistance to the 45 resistance R 42-R45, improve the input coupling of band pass filter, by the output π type attenuation network that the 48 resistance to the 50 resistance R 48-R50 form, improve the output coupling of band pass filter.The 33 inductance L 33 and the 111 capacitor C 111 are formed the series resonance network, further absorb and suppress the 27.095MHz high-frequency signal.
As shown in Figure 6, the core devices of FSK demodulating unit is demodulation chip U2.The coupling resonant network of the 113 capacitor C 113, the 118 electric capacity and C118 the 36 inductance L 36 compositing chip inputs.The 10th pin and the 11st pin of U2 are exported the differential signal of a pair of demodulation.The dot-mode transponder upward signal mates the 5th pin that resonant network is sent into U2 through input, and the 10th pin of U2 and the 11st pin are exported the differential signal of a pair of demodulation to the difference amplification and rectification circuit.As most preferred embodiment, demodulation chip U2 adopts the special-purpose FSK demodulation chip MC13055 of Motorola Inc..
As shown in Figure 7, the differential signal of demodulation chip output is input to behind the LC low-pass filter network that the 38 inductance L 38 and the 136 capacitor C the 136, the 39 inductance L 39 and the 135 capacitor C 135 are formed respectively and carries out processing and amplifying among the differential amplifier circuit U6A.Outputing to digital processing element then decodes.
As shown in Figure 8, dual-mode antenna is a dual-resonant antenna, it includes printed board coil and the coaxial cable coiling that is fixed on the printed board periphery, coaxial cable one end ground connection, the other end links to each other with isolated location by the 101 inductance L the 101, the 102 inductance L 102, the 3rd capacitor C 3, first resistance R 1, second resistance R 2 of order series connection, wherein the 101 inductance L 101 two ends are parallel with first capacitor C 1, the, 102 inductance L 102 two ends and are parallel with second capacitor C 2.The printed board coil produces mutual inductance L with the coaxial cable coiling that is fixed on the printed board periphery, its inductance value is approximately 1～2uH, the inductance value of the 101 inductance L 101, the 102 inductance L 102 is 100nH, and the resistance of first resistance R 1 and second resistance R 2 is 10 ohm.C1, C2 present open circuit at low frequency 4.234MHz, and C3 then presents short circuit when high frequency 27.095MHz.Therefore, L101, L102, three inductance of L and C1, C2 acting in conjunction realize the double resonance pattern, resonance frequency all near 27.095MHz, thereby obtained the resonant bandwidth of broad, be used for radiation 27.095MHz carrier only signal and ASK modulation signal.L101, L102, three inductance of L and C3 acting in conjunction, resonance are used to receive the upward signal of dot-mode transponder feedback near 4.234MHz.In order to improve the coupling of transmitting antenna and transmitter, in feeder, seal in two 10 ohm power resistor R1 and R2.Though the power resistor that adds can loss part power, reduces radiation efficiency, guaranteed under the situation of radiation field intensity that the transmitter port coupling is near 50 ohm satisfying.
High level ASK modulation circuit of the present utility model, dual-resonant antenna, transmitting-receiving isolated location circuit are simple, and wherein the dual-band antenna of high level ASK modulation circuit and wide transmitted bandwidth is that high-rate wireless writes and brings possibility; Dual-band antenna has reduced the power consumption of R-T unit realizing having obtained sufficiently high emission effciency under the situation of mating with transmitter simultaneously; And isolated location adopts simple circuit form promptly to realize two-frequency operation, has finished the isolation of receiving and transmitting signal.Make that use R-T unit programmable device of the present utility model is simple, reliable and practical.
Claims (10)
1. R-T unit that is used for dot-mode transponder, it is characterized in that: described R-T unit is made up of radiating portion and receive path; Radiating portion is linked in sequence by signal generating circuit, front-located power amplifier, power amplification, isolated location and dual-mode antenna and constitutes, and the ASK modulation circuit connects power amplification circuit; Receive path is linked in sequence by dual-mode antenna, isolated location, bandpass filtering unit, FSK demodulator circuit and difference amplification and rectification circuit and constitutes.
2. the R-T unit that is used for dot-mode transponder according to claim 1, it is characterized in that: described signal generating circuit is connected to form by crystal oscillator (X1) and one five rank LC low pass filter of a high frequency stability, described five rank LC low pass filters are by first inductance (L1), second inductance (L2) of serial connection, and the 5th electric capacity (C5), the 6th electric capacity (C6) and the 7th electric capacity (C7) that are connected between first inductance (L1) end, first inductance (L1) and second inductance (L2) contact, second inductance (L2) other end and the ground are formed.
3. the R-T unit that is used for dot-mode transponder according to claim 1, it is characterized in that: described front-located power amplifier and power amplification are connected to form by the two stage power field effect transistor, the front-located power amplifier pipe adopts the 4th power MOS pipe (Q4), and power amplifier tube adopts the 5th power MOS pipe (Q5).
4. the R-T unit that is used for dot-mode transponder according to claim 3, it is characterized in that: the tenth inductance (L10) that is connected in series between the 39 electric capacity (C39) between the 38 electric capacity (C38) of described the 4th power MOS pipe (Q4) source electrode, the 38 electric capacity (C38) other end and the ground, the 38 electric capacity (C38) and the 5th power MOS pipe (Q5) grid is formed T type matching network, realizes the coupling of the input stage of the output stage of front-located power amplifier pipe and final stage power amplifier pipe; The 49 electric capacity (C49) and the 50 electric capacity (C50) that are connected between the 13 inductance (L13), the 13 inductance (L13) two ends and the ground of the 5th power MOS pipe (Q5) source electrode are formed π type matching network, finish the output coupling of final stage power amplifier.
5. the R-T unit that is used for dot-mode transponder according to claim 1 is characterized in that: described ASK modulation circuit is connected and composed by emitter follower, series resonant network, RC filter network; The 32 resistance (R32), the operational amplifier (U1B) that are serially connected in operational amplifier (U1B) positive input constitute emitter follower; The 61 electric capacity (C61), the 35 resistance (R35) and the 16 inductance (L16) the composition series resonant network that is connected in parallel; The 59 electric capacity (C59) between the 60 series capacitance (C60), the 34 resistance (R34), the 60 series capacitance (C60) and the 34 resistance (R34) contact and the ground of serial connection is formed the RC filter network.
6. the R-T unit that is used for dot-mode transponder according to claim 1 is characterized in that: described isolated location is made of seven rank elliptic function low pass filters and duplexing buffer circuit; The 62 electric capacity to the 65 electric capacity (C62-C65) between the 17 inductance to the 19 inductance (L17-L19), the 17 inductance to the each two ends of 19 inductance and the ground of serial connection are formed seven rank elliptic function low pass filters; The 20 inductance to the 24 inductance (L20-L24) and the 74 electric capacity to seven 18 electric capacity (C74-C78) are formed duplexing buffer circuit.
7. the R-T unit that is used for dot-mode transponder according to claim 1 is characterized in that: described bandpass filtering unit is connected and composed by the 100 electric capacity (C100), input π type attenuation network, five rank band pass filters, series resonance network, output π type attenuation network.
8. the R-T unit that is used for dot-mode transponder according to claim 1 is characterized in that: the core devices of described FSK demodulating unit is demodulation chip (U2).
9. the R-T unit that is used for dot-mode transponder according to claim 8 is characterized in that: described demodulation chip adopts MC13055.
10. the R-T unit that is used for dot-mode transponder according to claim 1 is characterized in that: described dual-mode antenna is made of printed board coil and the coaxial cable coiling that is fixed on the printed board periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202606260U CN201577087U (en) | 2009-11-20 | 2009-11-20 | Transmit-receive device used for point type responser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202606260U CN201577087U (en) | 2009-11-20 | 2009-11-20 | Transmit-receive device used for point type responser |
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| CN201577087U true CN201577087U (en) | 2010-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009202606260U Expired - Lifetime CN201577087U (en) | 2009-11-20 | 2009-11-20 | Transmit-receive device used for point type responser |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664655A (en) * | 2012-05-10 | 2012-09-12 | 北京交大思诺科技有限公司 | Transponder message reading and writing device |
| CN102917500A (en) * | 2012-10-24 | 2013-02-06 | 浙江北光照明科技有限公司 | LED high power source with linear dimming function |
| US10547339B2 (en) | 2016-01-29 | 2020-01-28 | Apple Inc. | Electronic devices having millimeter wave wireless data transfer capabilities |
| CN116979989A (en) * | 2023-09-22 | 2023-10-31 | 北京全路通信信号研究设计院集团有限公司 | Industi track transponder device |
-
2009
- 2009-11-20 CN CN2009202606260U patent/CN201577087U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664655A (en) * | 2012-05-10 | 2012-09-12 | 北京交大思诺科技有限公司 | Transponder message reading and writing device |
| CN102917500A (en) * | 2012-10-24 | 2013-02-06 | 浙江北光照明科技有限公司 | LED high power source with linear dimming function |
| CN102917500B (en) * | 2012-10-24 | 2014-11-05 | 浙江北光照明科技有限公司 | LED high power source with linear dimming function |
| US10547339B2 (en) | 2016-01-29 | 2020-01-28 | Apple Inc. | Electronic devices having millimeter wave wireless data transfer capabilities |
| CN116979989A (en) * | 2023-09-22 | 2023-10-31 | 北京全路通信信号研究设计院集团有限公司 | Industi track transponder device |
| CN116979989B (en) * | 2023-09-22 | 2024-04-26 | 北京全路通信信号研究设计院集团有限公司 | Indusi track transponder device |
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Granted publication date: 20100908 |
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| CX01 | Expiry of patent term |