1. The device is a frequency conversion display road traffic signal lamp, which consists of a signal shaping circuit U1, a frequency halving unit U2, a frequency doubling signal generating unit U3, a signal combining and processing unit U4, a communication unit U5, a signal lamp panel power supply U6, a signal lamp LED lamp panel U7 and a switch triode Q1, wherein the signal shaping circuit U1 is connected with an external alternating current power supply through an alternating current signal input port and is connected with a pulse signal input port of a frequency halving unit U2 through a pulse signal output port; a frequency division signal output port of the frequency division unit U2 is connected with a synchronous signal input port of the frequency multiplication signal generation unit U3; an N frequency doubling pulse A output port and an N frequency doubling pulse B output port of the frequency doubling signal generation unit U3 are correspondingly connected with a signal A input port and a signal B input port of the signal combination processing unit U4 respectively, and a frequency doubling number, duty ratio and phase control input port is connected with a frequency doubling number, duty ratio and phase control output port of the communication unit U5; a signal or output port of the signal combination processing unit U4 is connected with a G pole of the switching triode Q1; the communication interface of the communication unit U5 is connected with a communication circuit; the signal lamp panel power supply U6 is connected with the S pole of the switching triode Q1; the D pole of the switching triode Q1 is connected with a signal lamp LED lamp panel U7; n in the description represents a positive integer.

2. The apparatus of claim 1, wherein the output waveform of the N-times pulse A of the frequency doubling signal generating unit U3 is S1, the output waveform of the N-times pulse B is S2, and the output waveform of the signal combining processing unit U4 is S3; 1 cycle duration in the waveforms S1, S2, S3 is equal to 1 cycle duration of the ac power source multiplied by 2 divided by N; 1 pulse exists in one period of the waveforms S1 and S2, and the duty ratio and the phase of the pulse can be set; waveform S3 is equal to the logical OR of waveforms S1 and S2; the signal or output port of the signal combination processing unit U4 controls the G pole of the switching transistor Q1, so that the S pole and the D pole of the switching transistor Q1 can be switched on or off, and the signal lamp LED panel U7 is correspondingly turned on or off.

3. The apparatus of claim 1, wherein: the external alternating current power supply connected with the signal shaping circuit U1 can be alternating current 220 volt mains electricity or alternating current obtained after alternating current 220 volt mains electricity is transformed; the frequency-halving unit U2, the frequency-doubling signal generating unit U3, the signal merging processing unit U4 and the communication unit U5 can be merged into a programmable device and realized by programming, and the programmable device can be an FPGA or an MCU; the switching triode Q1 can be a PNP triode circuit, an MOS tube circuit and a relay circuit; the signal shaping circuit U1 can be a photoelectric coupler circuit or a voltage comparator circuit; the frequency multiplier, duty cycle and phase control parameters required for the operation of the device may be received via communication unit U5.

Background

At present, at a traffic signal lamp intersection provided with electronic police video monitoring, a red signal lamp is often displayed as yellow or white, and a green signal lamp and a yellow signal lamp are also displayed as white on a video or a photo captured by an electronic police, which is caused by the fact that the signal lamps are too bright compared with electronic police video monitoring equipment. As evidence for penalizing traffic offences, signal lamp color distortion on the image will affect the penalties for traffic offences.

The invention adopts the frequency conversion technology and the commercial power frequency calibration synchronization technology for the light emission of the signal lamp, the display is normal when the human eyes see that the signal lamp is on, and the color is normal when the human eyes see that the video monitoring equipment can see the color, thereby well solving the problem of color change caused by mismatching of the traffic signal lamp and the electronic police video monitoring equipment.

Disclosure of Invention

The device is a frequency conversion display road traffic signal lamp, which consists of a signal shaping circuit U1, a frequency halving unit U2, a frequency doubling signal generating unit U3, a signal combining and processing unit U4, a communication unit U5, a signal lamp panel power supply U6, a signal lamp LED lamp panel U7 and a switch triode Q1, wherein the signal shaping circuit U1 is connected with an external alternating current power supply through an alternating current signal input port and is connected with a pulse signal input port of a frequency halving unit U2 through a pulse signal output port; a frequency division signal output port of the frequency division unit U2 is connected with a synchronous signal input port of the frequency multiplication signal generation unit U3; an N frequency doubling pulse A output port and an N frequency doubling pulse B output port of the frequency doubling signal generation unit U3 are correspondingly connected with a signal A input port and a signal B input port of the signal combination processing unit U4 respectively, and a frequency doubling number, duty ratio and phase control input port is connected with a frequency doubling number, duty ratio and phase control output port of the communication unit U5; a signal or output port of the signal combination processing unit U4 is connected with a G pole of the switching triode Q1; the communication interface of the communication unit U5 is connected with a communication circuit; the signal lamp panel power supply U6 is connected with the S pole of the switching triode Q1; the D pole of the switching triode Q1 is connected with a signal lamp LED lamp panel U7; n in the description represents a positive integer.

In the device, the waveform output by the N frequency doubling pulse A of the frequency doubling signal generating unit U3 is S1, the waveform output by the N frequency doubling pulse B is S2, and the signal or output waveform of the signal merging processing unit U4 is S3; 1 cycle duration in the waveforms S1, S2, S3 is equal to 1 cycle duration of the ac power source multiplied by 2 divided by N; 1 pulse exists in one period of the waveforms S1 and S2, and the duty ratio and the phase of the pulse can be set; waveform S3 is equal to the logical OR of waveforms S1 and S2; under the control of the G pole of the switching transistor Q1 by a signal or output port of the signal combination processing unit U4, the S pole and the D pole of the switching transistor Q1 can be switched on or off, and the signal lamp LED panel U7 is correspondingly turned on or off.

In the device, an external alternating current power supply connected with the signal shaping circuit U1 can be alternating current 220 volt commercial power, and can also be alternating current obtained by transforming alternating current 220 volt commercial power; the frequency-halving unit U2, the frequency-doubling signal generating unit U3, the signal merging processing unit U4 and the communication unit U5 can be merged into a programmable device and realized by programming, and the programmable device can be an FPGA or an MCU; the switching triode Q1 can be a PNP triode circuit, an MOS tube circuit and a relay circuit; the signal shaping circuit U1 can be a photoelectric coupler circuit or a voltage comparator circuit; the frequency multiplier, duty cycle and phase control parameters required for the operation of the device may be received via communication unit U5.

Drawings

Fig. 1 is a schematic block diagram.

Fig. 2 is a schematic diagram of waveforms.

In fig. 1 and 2, a waveform S1 is a signal waveform of the N-fold pulse a output of the frequency-doubled signal generating unit U3; the waveform S2 is the signal waveform output by the N-fold frequency pulse B of the frequency-doubled signal generating unit U3; the waveform S3 is a waveform of a signal or an output of the signal combination processing unit U4, and is a waveform generated by logical or of the waveforms S1 and S2.

Examples

Referring to fig. 1 and 2, the device is a frequency conversion display road traffic signal lamp, which is composed of a signal shaping circuit U1, a frequency-halving unit U2, a frequency-doubling signal generating unit U3, a signal merging processing unit U4, a communication unit U5, a signal lamp panel power supply U6, a signal lamp LED panel U7 and a switching triode Q1, wherein the signal shaping circuit U1 is connected with an external alternating current power supply through an alternating current signal input port and is connected with a pulse signal input port of a frequency-halving unit U2 through a pulse signal output port; a frequency division signal output port of the frequency division unit U2 is connected with a synchronous signal input port of the frequency multiplication signal generation unit U3; an N frequency doubling pulse A output port and an N frequency doubling pulse B output port of the frequency doubling signal generation unit U3 are correspondingly connected with a signal A input port and a signal B input port of the signal combination processing unit U4 respectively, and a frequency doubling number, duty ratio and phase control input port is connected with a frequency doubling number, duty ratio and phase control output port of the communication unit U5; a signal or output port of the signal combination processing unit U4 is connected with a G pole of the switching triode Q1; the communication interface of the communication unit U5 is connected with a communication circuit; the signal lamp panel power supply U6 is connected with the S pole of the switching triode Q1; the D pole of the switching triode Q1 is connected with a signal lamp LED lamp panel U7; n in the description represents a positive integer.

Referring to fig. 1 and 2, in the present apparatus, the output waveform of the N-fold pulse a of the frequency-doubled signal generating unit U3 is S1, the output waveform of the N-fold pulse B is S2, and the output waveform or the signal of the signal combination processing unit U4 is S3; 1 cycle duration in the waveforms S1, S2, S3 is equal to 1 cycle duration of the ac power source multiplied by 2 divided by N; 1 pulse exists in one period of the waveforms S1 and S2, and the duty ratio and the phase of the pulse can be set; waveform S3 is equal to the logical OR of waveforms S1 and S2; under the control of the G pole of the switching transistor Q1 by a signal or output port of the signal combination processing unit U4, the S pole and the D pole of the switching transistor Q1 can be switched on or off, and the signal lamp LED panel U7 is correspondingly turned on or off.

Referring to fig. 1 and 2, in the apparatus, the external ac power source connected to the signal shaping circuit U1 may be ac 220 v mains electricity, or ac 220 v mains transformed ac; the frequency-halving unit U2, the frequency-doubling signal generating unit U3, the signal merging processing unit U4 and the communication unit U5 can be merged into a programmable device and realized by programming, and the programmable device can be an FPGA or an MCU; the switching triode Q1 can be a PNP triode circuit, an MOS tube circuit and a relay circuit; the signal shaping circuit U1 can be a photoelectric coupler circuit or a voltage comparator circuit; the frequency multiplier, duty cycle and phase control parameters required for the operation of the device may be received via communication unit U5.