CN211294157U

CN211294157U - Tunnel speed control visual induction repeater

Info

Publication number: CN211294157U
Application number: CN202020206012.0U
Authority: CN
Inventors: 张飞; 孟利洪; 谢海兵; 杨春海
Original assignee: Lishui Quanzhi Electronic Technology Co ltd
Current assignee: Lishui Quanzhi Electronic Technology Co ltd
Priority date: 2020-02-25
Filing date: 2020-02-25
Publication date: 2020-08-18
Anticipated expiration: 2030-02-25

Abstract

A tunnel speed control visual inducement repeater, comprising: the device comprises an input module, an output module, an input protection unit, an output protection unit, an input state display unit, an output state display unit, a signal amplifier, a double-output power supply module and a voltage selection unit; the signal amplifier have a plurality ofly, dual output power module passes through the voltage selection unit and links to each other with a plurality of signal amplifier respectively, input module loop through input protection unit, signal amplifier and input protection unit and be connected with output module, output state display element is located between input module and the input protection unit, output state display element is located between output protection unit and the output module, the utility model provides a quick vision induction repeater of tunnel accuse, the relay that can amplify multichannel signal provides functions such as operating voltage selection, wide voltage input.

Description

Tunnel speed control visual induction repeater

Technical Field

The utility model relates to an induced field of traffic specifically is an induced repeater of fast vision of tunnel accuse.

Background

In the vision induction control system for the expressway tunnel, a controller outputs a plurality of paths of control signals to respectively control the on or off of each loop of LED lamp, the control signals are PWM square wave signals, and the frequency is adjustable within 0.1-10 HZ; the PWM square wave signal has a high level of DC24V or DC12V and a low level of 0V according to different induced system working voltages. With the increase of the transmission distance, the resistance of the transmission cable causes the increase of the voltage drop of the control signal, when the voltage drop reaches a certain degree, the LED induction lamp cannot be driven, so the transmission distance cannot be too far due to the influence of the output power, through practical tests, when the rated voltage is DC24V, the terminal voltage drop cannot be greater than 5V, when the rated voltage is DC12V, the terminal voltage drop cannot be greater than 3V, but when the 2 x 2.5 signal cable is used, the installation distance of the induction lamp is 10 meters, the farthest transmission distance is about 800 meters, and the working voltage is reduced to about DC18V or DC 9V.

When the loop voltage drop reaches the limit value, in order to realize the long-distance transmission of the vision induction control signals, a repeater is required to be added for signal amplification, the tunnel vision induction controller has more than 4 paths of output, and the existing induction system repeater in the industry can only amplify single-path LED induction signals in a relaying way and cannot realize the synchronous amplification and relaying of the multi-path control signals of the vision induction system.

SUMMERY OF THE UTILITY MODEL

Current induction system repeater can only relay and amplify the single-channel signal, simultaneously, considers that mainstream induction system has multiple power supply modes such as DC12V, DC24V, the utility model provides a quick vision induction repeater of tunnel accuse, the relay that can amplify multichannel signal, for realizing the product compatibility, the multichannel is induced the repeater and still is provided functions such as operating voltage selection, wide voltage input.

In order to achieve the purpose of the invention, the utility model adopts the following technical scheme:

a tunnel speed control visual inducement repeater, comprising: the device comprises an input module, an output module, an input protection unit, an output protection unit, an input state display unit, an output state display unit, a signal amplifier, a double-output power supply module and a voltage selection unit; the dual-output power supply module is connected with the signal amplifiers through the voltage selection unit, the input module is connected with the output module through the input protection unit, the signal amplifiers and the input protection unit in sequence, the output state display unit is located between the input module and the input protection unit, and the output state display unit is located between the output protection unit and the output module.

The input module is provided with a plurality of inputs equal to the number of the signal amplifiers, and the output module is provided with a plurality of outputs equal to the number of the signal amplifiers.

The input protection unit and the output protection unit both adopt a plurality of DC24V direct current lightning protection devices with the number equal to that of the signal amplifiers.

The input state display unit and the output state display unit both adopt a plurality of LED indicating lamps with the same number as the signal amplifiers.

The dual-output power supply module adopts an AC 220V-DC 12/24V two-way output switching power supply, and the voltage selection unit is a gating contactor.

Each input is connected with the output through a corresponding DC24V direct current lightning protection device in the input protection module, a corresponding signal amplifier and a corresponding DC24V direct current lightning protection device in the output protection module in sequence respectively, and a loop is formed, and the output power of the loop is greater than 80W.

Compared with the prior art, the tunnel speed control visual induction repeater adopting the technical scheme has the following beneficial effects:

the interrupter comprises a multi-channel acquisition input, a power module, a working voltage selection unit, a signal amplification unit, an input and output protection module and the like. Through the combination of the above modules, the repeater can realize that:

1. relaying and amplifying 4 or more induction signals;

2. sampling wide voltage of 3-28V, wherein an input module is compatible with two modes of DC12V and DC 24V;

3. the two output voltages of DC12 and DC24 are supported, and the output voltages can be set on site;

4. the input and output signal protection function prevents the damage of lightning stroke to the repeater.

Drawings

FIG. 1 is a block diagram of a tunnel speed control visual induction repeater

Fig. 2 is a schematic diagram of the amplification of multiple signals by a repeater.

Fig. 3 is a schematic diagram of the control of the operating voltage of the gate contactor.

Fig. 4 is a schematic diagram of a solid state relay amplifying a signal.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The tunnel speed control visual induction repeater shown in fig. 1 to 4 comprises: the device comprises an input module, an output module, an input protection unit, an output protection unit, an input state display unit, an output state display unit, a signal amplifier, a double-output power supply module and a voltage selection unit.

The dual-output power supply module is respectively connected with the signal amplifiers through the voltage selection unit, the input module is connected with the output module through the input protection unit, the signal amplifiers and the input protection unit in sequence, the output state display unit is located between the input module and the input protection unit, and the output state display unit is located between the output protection unit and the output module.

As shown in fig. 2, the signal amplifiers amplify the low-voltage PWM signals input from the input module to rated voltage, the rated voltage is a high-power signal of DC12V or DC24V, the amplified PWM signals have high-level voltage stabilized at DC12V or DC24V, and the low-level voltage is 0V; as shown in fig. 4, the signal amplifier amplifies the signal using a solid state relay; the solid-state relay is a four-terminal active device, wherein two terminals are input control terminals, and the other two terminals are output controlled terminals; the input control end is connected with the original induction control signal, the positive pole of the switch power supply is output through the output controlled end, and the negative pole of the switch power supply is directly output. The input end supports wide voltage input of 3-28V, when an input induction signal is at a low level, the controlled end is disconnected, and the power supply does not output; when the input inducing signal is at high level, the controlled end is attracted, and the positive stage of the switching power supply is output through the controlled end; the action time delay of the solid-state relay is very small and can be almost ignored, so that the voltage of the signal output by the amplification of the solid-state relay is recovered to be standard voltage, the frequency and the phase are consistent with the original signal, meanwhile, the action part of the time delay relay is an electronic device, the reliable action times are hundreds of millions of times, the action time per second is calculated, the service life is longer than 10 years, the control requirement of an induction system is completely met, meanwhile, a plurality of amplifying circuits are integrated in the repeater, the negative electrode of the original induction signal is input and shared, the negative electrode of a switching power supply is output and shared, and the simultaneous amplification of multiple induction signals is realized.

The input module is provided with a plurality of inputs with the same number as the signal amplifiers, the output module is provided with a plurality of outputs with the same number as the signal amplifiers, the induced signal input and the induced signal output mainly realize two functions, one is the state monitoring of the signal and is realized by adopting a mode of a series resistor and a light-emitting diode indicator lamp, and the indicator lamp synchronously flickers to indicate that the corresponding input or output signal is normal; and the second is lightning protection and isolation, and in order to prevent the relay from being damaged by lightning stroke, the installation of a lightning protector for protection is recommended in an output and input loop.

The input protection unit and the output protection unit both adopt a plurality of DC24V direct current lightning protection devices with the same number as the signal amplifiers, the DC24V direct current lightning protection device provides signal isolation and protection effects, and in order to avoid the influence of the lightning protection device faults on signal sampling and output, the lightning protection device is connected in a parallel mode.

The input state display unit and the output state display unit both adopt a plurality of LED indicating lamps with the same number as the signal amplifiers, the LED indicating lamps display the states of each input loop and each output loop, and the lamps are turned on at a high level and turned off at a low level.

As shown in fig. 3, the dual-output power module adopts a switching power supply with two paths of output from AC220V to DC12/24V, the voltage selection unit is a gating contactor, the output signal can be switched to DC24V or DC12V through the gating contactor, relay amplification of different working voltage induction systems is met, when a DC12 working switch is turned on, the gating contactor is closed, the DC12V working voltage is output, otherwise, the gating contactor is turned off, and the DC24V working voltage is output.

Each input is connected with the output through a DC24V direct current lightning protection device corresponding to the input protection module, a corresponding signal amplifier and a DC24V direct current lightning protection device corresponding to the output protection module in sequence, and a loop is formed, wherein the output power of each loop is greater than 80W.

The above description is a preferred embodiment of the present invention, and a person skilled in the art can make several modifications and improvements without departing from the principles of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims

1. A tunnel speed control visual induction repeater, characterized in that: the method comprises the following steps: the device comprises an input module, an output module, an input protection unit, an output protection unit, an input state display unit, an output state display unit, a signal amplifier, a double-output power supply module and a voltage selection unit; the dual-output power supply module is connected with the signal amplifiers through the voltage selection unit, the input module is connected with the output module through the input protection unit, the signal amplifiers and the input protection unit in sequence, the output state display unit is located between the input module and the input protection unit, and the output state display unit is located between the output protection unit and the output module.

2. The tunnel speed control visual inducement repeater according to claim 1, characterized in that: the input module is provided with a plurality of inputs equal to the number of the signal amplifiers, and the output module is provided with a plurality of outputs equal to the number of the signal amplifiers.

3. The tunnel speed control visual inducement repeater according to claim 2, characterized in that: the input protection unit and the output protection unit both adopt a plurality of DC24V direct current lightning protection devices with the number equal to that of the signal amplifiers.

4. The tunnel speed control visual inducement repeater according to claim 3, wherein: the input state display unit and the output state display unit both adopt a plurality of LED indicating lamps with the same number as the signal amplifiers.

5. The tunnel speed control visual inducement repeater according to claim 4, wherein: the dual-output power supply module adopts an AC 220V-DC 12/24V two-way output switching power supply, and the voltage selection unit is a gating contactor.

6. The tunnel speed control visual inducement repeater according to any one of claims 2-5, wherein: each input is connected with the output through a corresponding DC24V direct current lightning protection device in the input protection module, a corresponding signal amplifier and a corresponding DC24V direct current lightning protection device in the output protection module in sequence respectively, and a loop is formed, and the output power of the loop is greater than 80W.