Multi-information code generation method and device

Abstract

The application relates to a multi-information code sending method and device, wherein the method comprises the following steps: taking n low-frequency crystal oscillators and 2 side-frequency crystal oscillators as the oscillation sources of a transmitter to generate n+2 oscillation signals, wherein the oscillation signals comprise n low-frequency oscillation signals, 1 upper side-frequency oscillation signal and 1 lower side-frequency oscillation signal; performing inversion processing on the oscillation signals; determining 2 signals from the n low-frequency oscillation signals subjected to the inversion processing according to external conditions, performing XOR processing on the 2 signals, and performing first frequency division processing on the signals subjected to the XOR processing to obtain first frequency division signals; inputting the first frequency division signals and the inverted upper and lower side-frequency oscillation signals into a logic gate circuit to perform FSK frequency synthesis and obtain synthesis signals; performing second frequency division processing on the synthesis signals to obtain second frequency division signals; and sequentially performing waveform shaping and power amplification on the second frequency division signals to obtain output FSK information codes. Compared with the prior art, the application has the advantages of simple structure, high reliability and low cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of FSK signal transmission, in particular to a multi-information code sending method and device. BACKGROUND

[0002] The multi-information code sending device is used for generating FSK information code externally, including low frequency and side frequency after frequency modulation.

[0003] The commonly used sending device is mainly realized by programming through FPGA or microcontroller, etc. Figure 2 As shown in the figure, the low frequency selected according to external conditions is used to synthesize the frequency shift signal of specific carrier frequency, which is output after power amplifier circuit. The microelectronic technology needs specific embedded personnel to write specific program, which causes high equipment cost, operation disorder of program itself, influence of various defect factors, poor reliability, easy chip production stop, high price, long procurement cycle and other shortcomings. SUMMARY

[0004] The purpose of the present application is to provide a multi-information code sending method and device with simple structure, high reliability and low cost.

[0005] The purpose of the present application can be realized by the following technical scheme:

[0006] A multi-information code sending method, comprising the following steps:

[0007] n low frequency crystal oscillators and 2 side frequency crystal oscillators are used as the oscillator source of the transmitter to generate n+2 oscillation signals, wherein the oscillation signals include n low frequency oscillation signals, 1 upper side frequency oscillation signal and 1 lower side frequency oscillation signal;

[0008] The oscillation signals are processed reversely;

[0009] 2 signals are determined according to external conditions for the n low frequency oscillation signals processed reversely, and XOR processing is performed, and first frequency division processing is performed on the signals after XOR processing to obtain first frequency division signals;

[0010] The first frequency division signals and the reversed upper and lower side frequency oscillation signals are input into a logic gate circuit to perform FSK frequency synthesis to obtain synthesis signals;

[0011] Second frequency division processing is performed on the synthesis signals to obtain second frequency division signals;

[0012] Waveform shaping and power amplification are sequentially performed on the second frequency division signals to obtain output FSK information code.

[0013] The first frequency division processing is 2 a frequency division for the signals, and the value of a depends on the low frequency oscillation signal.

[0014] The second frequency division processing is 2 b The value of b is determined according to the edge frequency oscillation signal, and b < a.

[0015] The waveform shaping shapes the square wave signal into a sine wave signal.

[0016] The power size of the output FSK information code is adjusted in multiple grades according to the track circuit condition.

[0017] A multi-information code sending device comprises:

[0018] An oscillation source is composed of n low-frequency crystal oscillators and 2 edge frequency crystal oscillators, and generates n+2 oscillation signals, wherein the oscillation signals comprise n low-frequency oscillation signals, 1 upper edge frequency oscillation signal and 1 lower edge frequency oscillation signal.

[0019] An inverter is used for inverting the oscillation signals;

[0020] A first frequency divider is used for determining 2 signals from the n low-frequency oscillation signals after inversion according to external conditions, performing XOR processing, performing first frequency division processing on the signals after XOR processing, and obtaining first frequency division signals;

[0021] A frequency synthesizer is composed of a logic gate circuit, and is used for inputting the first frequency division signals and the inverted upper and lower edge frequency oscillation signals into the logic gate circuit to perform FSK frequency synthesis, and obtaining synthesis signals;

[0022] A second frequency divider is used for performing second frequency division processing on the synthesis signals, and obtaining second frequency division signals;

[0023] A waveform shaper is used for performing waveform shaping on the second frequency division signals;

[0024] A power amplifier is used for performing power amplification on the second frequency division signals after waveform shaping, and obtaining output FSK information codes.

[0025] The first frequency division processing is 2 a The value of a is determined according to the low-frequency oscillation signal.

[0026] The second frequency division processing is 2 b The value of b is determined according to the edge frequency oscillation signal, and b < a.

[0027] The waveform shaping shapes the square wave signal into a sine wave signal.

[0028] The power size of the output FSK information code is adjusted in multiple grades according to the track circuit condition.

[0029] Compared with the prior art, the present application has the following beneficial effects:

[0030] (1) The present application is entirely built by discrete components and simple logic gate circuits, realizes the code generation function of the ordinary transmitter operation, has simple structure and high reliability.

[0031] (2) The present application adopts crystal oscillator and logic gate circuit, compared with chip materials, the crystal oscillator has more brands of general-purpose gate circuits, is not easy to stop production, is easy to purchase and has low cost. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a device circuit structure schematic diagram of the present application;

[0033] Figure 2 It is a code generation device structure schematic diagram of the prior art. DETAILED DESCRIPTION

[0034] The present application will be described in detail below in combination with the drawings and specific embodiments. The present embodiment is implemented on the premise of the technical scheme of the present application, gives detailed implementation mode and specific operation process, but the protection scope of the present application is not limited to the following embodiments.

[0035] A multi-information code generation device for transmitting up to 19 low-frequency signals (7Hz, 8Hz, 8.5Hz, 9Hz, 9.5Hz, 11Hz, 12.5Hz, 13.4Hz, 15Hz, 16.5Hz, 17.5Hz, 18.5Hz, 20Hz, 21.5Hz, 22.5Hz, 23.5Hz, 24.5Hz, 26Hz, 30Hz), 4 side frequency (550Hz, 650Hz, 750Hz, 850Hz) frequency deviation ±55Hz FSK signals, as shown in Figure 1 , comprising:

[0036] 1) oscillation source

[0037] The oscillation source is composed of 19 low-frequency crystal oscillators and 2 side frequency crystal oscillators, generates 21 oscillation signals, wherein the oscillation signals include 19 low-frequency oscillation signals, 1 upper side frequency oscillation signal and 1 lower side frequency oscillation signal.

[0038] The crystal oscillator adopts programmable silicon oscillator, has high stability, can directly write the frequency of the crystal oscillator, and is cheap.

[0039] 2) inverter

[0040] After the oscillation source generates the resonance signal, the oscillation signal is inverted and processed by the Schmidt trigger inverter, so that the rising edge and the falling edge of the signal are relatively straight.

[0041] 3) first frequency divider

[0042] The 19 low-frequency oscillation signals after reverse processing are determined according to external conditions (i.e. the signal frequency of the required output) to obtain 2 signals, which are input into two-stage frequency division circuit (i.e. the first frequency divider) for 2 11 frequency division processing, i.e. a=11, to obtain the first frequency division signal.

[0043] Here, 2 11 frequency division processing is selected, mainly considering the frequency division of the low-frequency oscillation signal, and the frequency of the low-frequency oscillation signal source is relatively high compared with the upper and lower side frequency oscillation signal sources.

[0044] 4) Frequency synthesizer

[0045] The frequency synthesizer is composed of a logic gate circuit, which is used to input the first frequency division signal and the upper and lower side frequency oscillation signals after reverse processing into the logic gate circuit for FSK frequency synthesis to obtain a synthesized signal.

[0046] 5) Second frequency divider

[0047] The second frequency divider is used to perform 2 6 frequency division processing on the synthesized signal, i.e. b=6, to obtain the second frequency division signal. Here, 2 6 frequency division processing is selected, mainly considering the frequency division of the upper and lower side frequency signals, and the frequency of the upper and lower side frequency oscillation signal sources is relatively low compared with the low-frequency oscillation signal source. The high and low values of a and b are matched, which combines the characteristics of the high and low frequencies of the low-frequency and upper and lower side frequency signals and guarantees the stable and reliable operation of the circuit.

[0048] 6) Waveform shaper

[0049] The waveform shaper is used to perform waveform shaping on the second frequency division signal to shape the square wave signal into a sine wave signal.

[0050] 7) Power amplifier, which is used to perform power amplification on the second frequency division signal after waveform shaping to provide two isolated output FSK information codes (i.e. frequency shift signals) with sufficient output power to the load. The size of the output power can be adjusted in three grades according to the load condition of the track circuit, and the power is 13W, 10W and 7W respectively.

[0051] The preferred embodiments of the present application are described in detail above. It should be understood that those skilled in the art can make many modifications and changes without creative labor according to the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiments based on the prior art according to the concept of the present application should be within the protection scope determined by the claims.

Claims

1. A method for transmitting multiple information codes, characterized in that, Includes the following steps: Using n low-frequency crystal oscillators and 2 side-frequency crystal oscillators as the oscillation source of the transmitter, n+2 oscillation signals are generated, including n low-frequency oscillation signals, 1 upper side-frequency oscillation signal and 1 lower side-frequency oscillation signal; Invert the oscillation signal; The n-channel low-frequency oscillation signals that have undergone phase inversion are used to determine two signals based on external conditions and XOR them. The XORed signals are then subjected to a first frequency division to obtain the first frequency-divided signal. The first frequency division signal and the inverted upper and lower sideband oscillation signals are input into a logic gate circuit to perform FSK frequency synthesis to obtain the synthesized signal; The synthesized signal is subjected to a second frequency division to obtain the second frequency-divided signal; The second frequency division signal is then subjected to waveform shaping and power amplification to obtain the output FSK information code.

2. The multi-information coding method according to claim 1, characterized in that, The first frequency division process is to divide the signal into 2... a The value of 'a' in frequency division depends on the low-frequency oscillation signal.

3. The multi-information coding method according to claim 2, characterized in that, The second frequency division process is to divide the signal into 2... b The value of b in the frequency division depends on the sideband oscillation signal. <a。 4. The multi-information coding method according to claim 1, characterized in that, The waveform shaping transforms the square wave signal into a sine wave signal.

5. The multi-information coding method according to claim 1, characterized in that, The power of the output FSK information code is adjustable in multiple levels depending on the track circuit conditions.

6. A multi-information code transmitting device, characterized in that, include: An oscillation source is composed of n low-frequency crystal oscillators and 2 side-frequency crystal oscillators, generating n+2 oscillation signals, wherein the oscillation signals include n low-frequency oscillation signals, 1 upper side-frequency oscillation signal and 1 lower side-frequency oscillation signal; An inverter is used to invert an oscillating signal; The first frequency divider is used to determine two signals from the n-channel low-frequency oscillation signals after phase inversion based on external conditions and perform XOR processing on them. The XOR processed signals are then subjected to first frequency division processing to obtain the first frequency divided signal. A frequency synthesizer, composed of logic gate circuits, is used to input the first frequency division signal and the inverted upper and lower sideband oscillation signals into the logic gate circuits to perform FSK frequency synthesis to obtain the synthesized signal. The second frequency divider is used to perform a second frequency division on the synthesized signal to obtain the second frequency divided signal; A waveform shaper is used to shape the waveform of the second frequency division signal; The power amplifier is used to amplify the power of the second frequency-divided signal after waveform shaping to obtain the output FSK information code.

7. A multi-information coding method according to claim 6, characterized in that, The first frequency division process is to divide the signal into 2... a The value of 'a' in frequency division depends on the low-frequency oscillation signal.

8. A multi-information coding method according to claim 7, characterized in that, The second frequency division process is to divide the signal into 2... b The value of b in the frequency division depends on the sideband oscillation signal. <a。 9. A multi-information coding method according to claim 6, characterized in that, The waveform shaping transforms the square wave signal into a sine wave signal.

10. A multi-information coding method according to claim 6, characterized in that, The power of the output FSK information code is adjustable in multiple levels depending on the track circuit conditions.

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