CN212483804U

CN212483804U - Signal machine detection device

Info

Publication number: CN212483804U
Application number: CN202020771476.6U
Authority: CN
Inventors: 梅满; 田文礼; 强鹏
Original assignee: Hangzhou Hang Hong Kong Metro Co ltd
Current assignee: Hangzhou Hang Hong Kong Metro Co ltd
Priority date: 2020-05-11
Filing date: 2020-05-11
Publication date: 2021-02-05
Anticipated expiration: 2030-05-11

Abstract

The utility model discloses a signaler detection device, which comprises a change-over switch and a conductive insertion piece; the conductive plug-in sheet comprises at least two power supply terminals and at least two connecting terminals, and the power supply terminals are electrically communicated with the power supply terminals; the power supply terminal is inserted into a cable box of the annunciator and is electrically connected with a corresponding wiring terminal of the annunciator; the connecting terminal is inserted into a cable box of the annunciator and is electrically connected with a corresponding connecting terminal of the annunciator; the change-over switch is arranged between the power supply terminal and the connecting terminal, and can be switched and communicated with one power supply terminal and one connecting terminal; the utility model discloses can provide a handy detection device, reduce and eliminate even and overhaul the during operation and switch into the operational risk of reserve mode with signal system to the detection of signal lamp state, whether detect each signal in proper order through change over switch is in normal condition, alleviates track traffic maintainer's intensity of labour, reduces the human cost.

Description

Signal machine detection device

Technical Field

The utility model relates to a detection device in the rail transit field especially relates to a semaphore detection device.

Background

In recent years, with the continuous development of communication technology and rail transit train control technology, a train operation control system based on communication, namely a CBTC system, has been greatly developed. Particularly, in the urban subway system, the train can run in a moving and blocking mode under the track running of the CBTC system. Different from the traditional working mode of detecting the position of a train by a circuit, the communication-based train automatic control system (CBTC) continuously, quickly and reliably transmits data by using a large-capacity train-ground bidirectional wireless communication technology, ensures the safe interval of train operation, improves the passing capacity of a line and realizes the function of moving block.

The signal system is used as a key system for guaranteeing the operation safety and efficiency of the subway train and has high safety, reliability and usability. In order to further ensure the reliable operation of a signal system, a backup operation signal system is arranged in the application of the domestic track traffic CBTC system, and the backup operation signal system is realized by secondary train occupation monitoring equipment and a computer interlocking function based on the CBTC system, namely when the CBTC system equipment fails, the backup operation signal system is degraded to a backup mode to meet the safety of train operation.

In the CBTC mode, the train runs automatically through a vehicle-mounted signal or manually by a driver; when the CBTC fails or other reasons, the train needs to be degraded into a backup mode, namely, the train is manually driven to run by a train driver according to the display of the ground trackside signal machine. Therefore, the railway traffic project is provided with the signal machine at the same time of being provided with the CBTC signal system.

In the backup mode, the annunciator has three working states, specifically as follows:

the first state: and the annunciator is in a CBTC mode and is in a backup mode, and the annunciator is in a corresponding lamp position according to the computer interlocking route state point.

And a second state: and the annunciator is lighted in the CBTC mode, and the annunciator is lighted in the backup mode according to the corresponding light position of the computer interlocking access state point.

And a third state: and the annunciator lights the blue light in the CBTC mode, and the annunciator lights the corresponding light position according to the computer interlocking route entry state point in the backup mode.

In the above three states, no matter what state the signal system is, in the backup mode, the signal machine is required to light the corresponding lamp position according to the computer interlocking route state.

At present, the design scheme of the signal machine of the domestic subway project is that the signal machine basically consists of four lamp positions, and four display lamp position structures of a yellow lamp, a green lamp, a red lamp and a blue lamp are sequentially arranged from top to bottom, and the specific meanings are as follows:

yellow light indicates that: notice or slow down speed (front switch on side);

green light means: running at a specified speed (the front turnout is opened in a straight direction);

red light indicates that: parking (prohibiting crossing of the rack signal);

the blue light indicates: the current train operation control mode is CBTC control.

To ensure good operation of the signaling system, regular and irregular maintenance and service of the signaling system are required, ensuring good operation of the CBTC system and reliable operation of the annunciator.

At present, the domestic subway basically adopts an LED signal machine; the LED signal machine realizes color display of different lamp positions by connecting LED lamp caps with different colors in the mechanism in series/parallel. Taking a certain type of LED signal machine as an example, 60 LED lamp caps are arranged in each mechanism, wherein each 5 LED lamp caps are connected in series to form a group, and 12 groups are connected in parallel in total. When all the LED lamp holders work normally, the working current is about 126 mA-135 mA (the distance of a signal machine is different, different output voltages of the outdoor lighting transformer are adjusted, the current is also different), the primary side input voltage range of the outdoor lighting transformer is 85-110 VAC, and the rated working current of the LED luminotron is 18-20 mA. When the outdoor annunciator has a broken wire fault, the group of LED lamp holders will be extinguished (5), the working current will be reduced at the moment, if the broken wire in the outdoor LED annunciator exceeds 3 beams (15), the current value will be reduced to the lower threshold set by the filament alarm device, the filament broken wire alarm is triggered, and the display effect of the annunciator will be influenced at the moment.

For the inspection of the annunciator, especially for the inspection of the annunciator in the backup mode, the output voltage of the outdoor lighting voltage transformation needs to be continuously adjusted to light three lamp positions of yellow, green and red lamps except the blue lamp, that is, if the control level of the signal system needs to be degraded to the backup mode during the inspection, the normal inspection operation can be carried out; this places a higher demand on the timing of the detection of the traffic signal, and even the traffic signal may affect the driving of the train during maintenance and repair. Therefore, the existing signal machine overhauling method is not convenient and economical enough, the labor intensity of the overhauling personnel is high, and the switching of the signal system to the backup mode can bring unknown operation risks.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of prior art, provide one kind and can conveniently carry and need not switch over the signalling system to the reserve mode can carry out the semaphore detection device that detects to the semaphore.

The utility model adopts the following technical scheme: a kind of signal machine detection device, including change-over switch and conductive insertion piece;

the conductive plug-in sheet comprises at least two power supply terminals and at least two connecting terminals, and the power supply terminals are electrically communicated with the power supply terminals; the power supply terminal is inserted into a cable box of the annunciator and is electrically connected with a corresponding wiring terminal of the annunciator; the connecting terminal is inserted into a cable box of the annunciator and is electrically connected with a corresponding connecting terminal of the annunciator;

the change-over switch is arranged between the power supply terminal and the connecting terminal, and the change-over switch can switch and communicate one power supply terminal and one connecting terminal.

Further, the power supply device further comprises an ammeter, and the ammeter is connected between the change-over switch and the power supply terminal in series.

The ammeter can adopt a digital ammeter.

Further, the device also comprises a voltmeter which is connected with the power supply terminal in parallel and used for detecting the voltage at the power supply terminal.

The ammeter can adopt a digital voltmeter.

Further, the device also comprises an ammeter, a voltmeter and a step-down rectification module; the ammeter is connected in series between the change-over switch and the power supply terminal; the voltmeter is connected with the power supply terminal in parallel and used for detecting the voltage at the power supply terminal; the primary input edge of the step-down rectifying module is connected in parallel to the voltmeter, and the secondary output edge of the step-down rectifying module is connected in parallel to the ammeter.

Furthermore, the change-over switch is not less than five gears, the number of the power supply terminals is at least four, the number of the connecting terminals is at least four, the four power supply terminals are inserted into the cable box on the annunciator and are respectively and electrically connected with the connecting terminals corresponding to the four color signal lamps of the annunciator, and the connecting terminals corresponding to the power supply terminals are inserted into the cable box on the annunciator and are respectively and electrically connected with the connecting terminals corresponding to the four color signal lamps of the annunciator; the contact points corresponding to four gears of the change-over switch are respectively connected with the four power supply terminals and the four connecting terminals, and the change-over switch can conduct one pair of the connected power supply terminals and the connecting terminals.

Furthermore, the conductive plug-in sheet also comprises a suspension terminal, the number of the four power supply terminals is 2, 4, 6 and 8, the number of the four connecting terminals is 1, 3, 5 and 7, the number 1 connecting terminal and the number 2 power supply terminal are in a group, the number 3 connecting terminal and the number 4 power supply terminal are in a group, the number 5 connecting terminal and the number 6 power supply terminal are in a group, the number 7 connecting terminal and the number 8 power supply terminal are in a group, the

number

2, 4, 6 and 8 power supply terminals are inserted into the cable box on the annunciator and are respectively and electrically connected with the corresponding connecting terminals of the four color signal lamps in the annunciator, and the

number

1, 3, 5 and 7 connecting terminals are inserted into the cable box on the annunciator; the change-over switch is a knob switch, the change-over switch has no less than five gears, the connecting

points

11, 33, 55, 77 and 99 at one side of the change-over switch are electrically communicated and connected with an ammeter, the connecting points 00, 22, 44, 66 and 88 at the other side of the change-over switch are respectively connected with the corresponding connecting

terminals

1, 3, 5 and 7, and the change-over switch can conduct one group of power supply terminals and the connecting terminals;

an ammeter is connected in series between the 11 terminal of the change-over switch and the suspension terminal, a voltmeter is arranged between the power supply terminal and the suspension terminal, the primary input edge of the step-down rectifier module is connected in parallel to the voltmeter, and the secondary output edge of the step-down rectifier module is connected in parallel to the ammeter.

Further, still include the protection box, change over switch sets up in the inside of protection box, and power supply terminal and connecting terminal set up in the inside of protection box.

The protection box is made of an insulating material, and the protection box can be made of an insulating resin material.

The utility model has the advantages that: the utility model discloses under each state of track traffic signal system, the homoenergetic is used for detecting the signal lamp for lighting, detects whether being in normal condition of each signal through change over switch in proper order.

Furthermore, the ammeter can be used for detecting the state of each signal lamp, and particularly for judging the working condition of the signal lamp with a plurality of LED lamps connected in parallel.

Furthermore, the voltmeter can be used for detecting whether the working voltage of the signal lamp is normal or not, and further judging whether the working state of the signal lamp is good or not.

Furthermore, the ammeter and the voltmeter are arranged simultaneously, the current value and the voltage value of the signal system can be detected simultaneously, the working state of the signal lamp is detected through multiple parameters, and the voltage reduction rectification module can reduce the influence of noise on the ammeter.

Furthermore, the protection box can realize insulation protection, dust prevention and electromagnetic interference resistance.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is another schematic structural diagram of the present invention;

fig. 3 is a schematic diagram of the transfer switch of the present invention;

fig. 4 is a schematic diagram of an ammeter of the present invention;

fig. 5 is a schematic diagram of a voltmeter according to the present invention;

fig. 6 is a schematic structural diagram of the protection box of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1, the signal detecting device comprises a change-over switch 2 and a conductive plug piece 3; the conductive patch 3 comprises at least two power supply terminals 31 and at least two connecting terminals 32, wherein the power supply terminals 31 are electrically communicated with the power supply terminals 31; the power supply terminal 31 is inserted into a cable box of the signal machine and is electrically connected with a corresponding wiring terminal of the signal machine; the connecting terminal 32 is inserted into a cable box of the annunciator and is electrically connected with a corresponding connecting terminal of the annunciator; the changeover switch 2 is provided between the power supply terminal 31 and the connection terminal 32, and the changeover switch 2 can switch and communicate one power supply terminal 31 with the connection terminal 32.

When the signal lamp is used, the method of 'borrowing electricity to light up' is adopted, the electric energy at the electrified signal lamp in a certain control mode of the signal system is transmitted to the signal lamp needing to be electrified to light up, and the control of electrifying the detection signal lamp is realized. In a specific embodiment, in the CBTC control mode, the power of the blue signal lamp is introduced into the other signal lamps, and the red lamp or the green lamp or the yellow lamp desired to be energized is turned on by the power source for driving the blue lamp. That is, all the power supply terminals 31 of the present embodiment are conducted to each other, and when the cable box of the signal of the power supply terminal 31 is electrically connected to the corresponding terminal of the signal, the power supply terminal 31 corresponding to the blue lamp draws electric energy from the terminal where the blue lamp is located and transmits the electric energy to the other power supply terminals 31, so that each power supply terminal 31 is energized. The change-over switch 2 is operated to make the power supply terminal 31 of the gear position of the change-over switch 2 conducted with the connection terminal 32, and the connection terminal 32, which is electrically connected with the corresponding connection terminal of the signal through the cable box inserted into the signal, conducts the signal lamp with the corresponding color, and lights the signal lamp. The operator can observe the state of the signal lamp, so as to judge whether the signal lamp is damaged. Simultaneously, blue lamp signal lamp also needs change over switch 2 to set up just can light when switching on with power supply terminal 31 and connecting terminal 32 that blue lamp signal lamp is connected because the setting of cable box department binding post, realizes that operating personnel detects the time, and the semaphore can only have a signal lamp circular telegram in the same time.

As a specific embodiment, the power supply terminals 31 may be two, the connection terminals 32 may be two, one power supply terminal 31 and one connection terminal 32 as a set; wherein a set of power supply terminal 31 and connecting terminal 32 are connected with the binding post that electrified signal lamp corresponds in the signal machine, another a set of power supply terminal 31 and connecting terminal 32 insert the signal machine cable box and need detect the binding post that the signal lamp that accepts corresponds and be connected, power supply terminal 31 and connecting terminal 32 that switch on mutually with the detection signal lamp when change over switch 2 intercommunication are, wait to detect that the signal lamp is gone up electrically, this signal lamp does not light, then show that corresponding lamp pearl has damaged, this signal lamp lights, then show that corresponding lamp pearl can work. Then, the power supply terminal 31 and the connection terminal 32 for conducting with the detection signal lamp are sequentially connected with other signal lamps to be detected for detecting the working state of the signal lamp.

As a specific implementation manner, the number of the power supply terminals 31 and the connection terminals 32 may be the same as the number of the colors of the signal lamp, and only once inserting all the power supply terminals 31 and the connection terminals 32 into the cable box in the signal machine to connect with the corresponding connection terminals, the detection work of the signal lamp can be completed in sequence by controlling the change-over switch 2.

As a specific embodiment, the number of the shift positions of the change-over switch 2 may be more than the number of the power supply terminals 31, and the specific number may be more than 1, so that the change-over switch 2 is conveniently set to a neutral position, i.e. any one set of the power supply terminals 31 and the connection terminals 32 is not connected, and the operation safety is improved.

Further, an ammeter 4 is connected in series between the changeover switch 2 and the power supply terminal 31.

When the signal lamp is used, only one signal lamp can be electrified in the signal lamp at the same time, and the current condition of the signal lamp in the electrified state can be reflected by the number of the ammeter 4.

Further, the traffic light detecting apparatus may further include a voltmeter 5, wherein one end of the voltmeter 5 is connected to the power supply terminal 31 for detecting the voltage at the power supply terminal 31.

In the embodiment, the other end of the voltmeter may be grounded. In specific implementation, the signal lamps are LED signal lamps, each signal lamp is provided with 60 LED lamp caps, wherein each 5 LED lamp caps are connected in series to form a group, and 12 groups are connected in parallel in total. When all the LED lamp holders work normally, the working current is about 126 mA-135 mA (the distance of the signal machine is different, the current is also different by adjusting different output voltages of the outdoor lighting transformer). For example, the input voltage range of the primary side of the outdoor lighting transformer is 85-110 VAC, and the rated working current of the LED luminous tube is 18-20 mA. Because the semaphore can only have a signal lamp circular telegram in the same time, can judge signal lamp LED's state through 4 readings of ampere meter that judge semaphore monitoring devices, promptly when the trouble of some LED lamp pearls in the signal lamp, the electric current through the signal lamp diminishes, the reading of ampere meter 4 diminishes correspondingly. As a specific embodiment, the ammeter 4 may be a digital display ammeter. Similarly, the reading of the voltmeter 5 is the detected working voltage of each signal lamp, and the abnormity of the working voltage of the signal lamp can be judged according to the distance between the signal machine and the output transformer, so as to further judge whether the circuit of the signal lamp is abnormal.

As a specific implementation manner, the conductive patch 3 includes four power supply terminals 31 and four connection terminals 42, the change-over switch 2 includes a five-gear switching state, the four power supply terminals 31 and the four connection terminals 42 correspond to connection terminals in a cable box of the signal machine, and five gears of the change-over switch 2 correspond to a four-color signal lamp and a neutral position respectively.

Further, the present embodiment further includes a step-down rectification module 6. As shown in fig. 2, the step-down rectification module 6 is disposed between the transfer switch 2 and the power supply terminal 31, a primary side of the step-down rectification module 6 is connected in parallel with the voltmeter 5, and a secondary side of the step-down rectification module 6 is connected in parallel with the ammeter 4; one side of the ammeter 4 is connected with the change-over switch 2, and the other side of the ammeter 4 is grounded; one side of voltmeter 5 is connected to power supply terminal 31, and the other side of voltmeter 5 is grounded.

As a specific embodiment, the buck rectifier module 6 can buck 110V to 5V and provide dc power to the ammeter 4.

In the implementation of the present embodiment, the step-down rectifier module 6 reduces the voltage on the primary side on the secondary side, and according to the principle of the transformer, the primary side inputs the voltage, and the higher the voltage, the smaller the current; and the secondary side outputs, and similarly, the smaller the voltage, the larger the current. Therefore, the secondary side current is amplified relative to the primary side current, and the accuracy of detection can be improved.

Further, the present embodiment further includes a floating terminal 33, as shown in fig. 2, the step-down rectification module 6 is disposed between the transfer switch 2 and the power supply terminal 31, a primary side of the step-down rectification module 6 is connected in parallel with the voltmeter 5, and a secondary side of the step-down rectification module 6 is connected in parallel with the ammeter 4; one side of the ammeter 4 is connected with the change-over switch 2, and the other side of the ammeter 4 is connected with the suspension terminal 33; one side of the voltmeter 5 is connected to the power supply terminal 31, and the other side of the voltmeter 5 is connected to the flying terminal 33.

As a specific embodiment, the power supply device comprises four power supply terminals 31, four connection terminals 32 and a suspension terminal 33, wherein the power supply terminals 31 are specifically numbered 2, 4, 6 and 8, the connection terminals are specifically numbered 1, 3, 5 and 7, and the suspension terminal 33 is specifically numbered 0; the interior of the change-over switch 2 consists of five gears, each gear consists of two contacts, and the number of the ten contacts is 11, 22, 33, 44, 55, 66, 77, 88, 99 and 00; when the change-over switch 2 is arranged at a K1 gear, the contacts 11-22 are switched on, and the others are not switched on; when the change-over switch 2 is arranged at a K2 gear, the contacts 33-44 are connected, and the other contacts are not connected; when the change-over switch 2 is arranged at the K3 gear, the contacts 55-66 are switched on, and the others are not switched on; when the change-over switch 2 is arranged at the K4 gear, the contacts 77-88 are switched on, and the others are not switched on; when the change-over switch 2 is arranged at a K5 gear, the contact 99-00 is connected, and the other contacts are not connected; the shift position K1 is a neutral position, and is not connected to any power supply terminal 31 and any connection terminal 32; when the change-over switch 2 is arranged at a gear K2, the power supply terminal 31 and the connecting terminal 32 communicated with the blue signal lamp are conducted, and the blue signal lamp of the signal machine is lightened; when the change-over switch 2 is arranged at a gear K3, the power supply terminal 31 and the connecting terminal 32 communicated with the red signal lamp are conducted, and the red signal lamp of the signal machine is lightened; when the change-over switch 2 is arranged at a gear K4, the power supply terminal 31 and the connecting terminal 32 communicated with the green signal lamp are conducted, and the green signal lamp is lightened; the change-over switch 2 is arranged at a gear K5 to conduct the power supply terminal 31 and the connection terminal 32 communicated with the yellow signal lamp; by the switch, when the lighting light source of the signal machine is switched, only one lamp position is kept to be turned on at any time, and other lamp positions are turned off.

The ammeter 4, the voltmeter 5 and the step-down rectifying module 6 can detect and display current and voltage information. The ammeter 4 is an LED digital display ammeter, the voltmeter is 5, and the step-down rectification module is a 110V to 5V step-down rectification module; digital display ammeter + pole and 2.5mm²The terminal 0 of the conductive insertion sheet 3 is connected, the pole-pole of the digital display ammeter is connected with the change-over switch terminal 1, and the ammeter is in a series structure inside the embodiment. Digital display voltmeter N end and 2.5mm²The No. 8 terminal of the conductive insertion sheet is connected, and the L end of the digital display voltmeter is 2.5mm²The No. 0 terminal of the conductive insertion sheet is connected, and the voltmeter 5 is in a parallel structure in the device. The 110V-to-5V step-down rectification module is used for providing a working direct current power supply for the ammeter 4, and the primary side input end N of the rectification module is equal to SUPU2.5mm²The No. 8 terminal of the conductive insertion sheet is connected, and the primary side input end L is connected with SUPU2.5mm²The No. 0 terminal of the conductive insertion sheet is connected, the secondary side output end VCC of the conductive insertion sheet is connected with the working + pole of the digital display ammeter, and the secondary side output end GND is connected with the working-pole of the digital display ammeter. The suspension terminal 0 is grounded; alternatively, the floating terminal 0 is grounded after being connected to a load.

As a specific embodiment, the present example further includes a protection box 1, the protection box 1 is a housing of the annunciator detection device; specifically, the protection box 1 is of a cuboid structure, the protection box 1 is made of an insulating material, specifically, insulating plastics, and the protection box 1 is used for bearing the installation and fixation of all parts; the change-over switch 2 is provided inside the protective case 1, and the power supply terminal 31 and the connection terminal 32 are provided inside the protective case 1; the protection box 1 is used for the main body shell of the device and can realize the characteristics of insulation protection, dust prevention and electromagnetic interference resistance.

As a specific implementation mode, the change-over switch 2 is a knob switch, and a straight round hole is drilled in the center of the front surface of the protection box 1 for the change-over switch 2 to extend out of the box body; four round holes for fixing the change-over switch 2 are drilled around the round hole for the change-over switch 2 knob to extend out of the protection box 1, the power supply terminal 31 and the connecting terminal 32 are arranged in the protection box 1, the protection box 1 is hollow at the connecting positions of the power supply terminal 31 and the connecting terminal 32 and the wiring terminal in the signal machine, and the power supply terminal 31 or/and the connecting terminal 32 can be electrically connected with the corresponding wiring terminal in the signal machine. As a specific embodiment, two rectangular grooves are respectively arranged on the side surfaces of the protective box 1 and are respectively used for arranging the ammeter 4 and the voltmeter 5. Specifically, the ammeter 4 can be a digital display ammeter, the voltmeter 5 can be a digital display voltmeter, and the digital display panels of the digital display ammeter and the digital display voltmeter can be respectively arranged in the grooves of the two rectangular grooves to be fixed. As a specific embodiment, the protection case 1 has a rectangular parallelepiped structure, as shown in fig. 6; the change-over switch 2 is a five-gear knob switch, as shown in fig. 3; the ammeter 4 is a digital display ammeter, and the interface of the ammeter 4 is shown in fig. 4; the voltmeter 5 is a digital display voltmeter, and the interface of the voltmeter 5 is shown in fig. 5.

The utility model discloses a protection scope is not limited to above-mentioned embodiment, and the all belongings the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a protection scope. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The signal machine detection device is characterized by comprising a change-over switch (2) and a conductive plug sheet (3);

the conductive plug-in sheet (3) comprises power supply terminals (31) and connecting terminals (32), the number of the power supply terminals (31) is not less than two, the number of the connecting terminals (32) is not less than two, and the power supply terminals (31) are electrically communicated with the power supply terminals (31); the power supply terminal (31) is inserted into a cable box of the signal machine and is electrically connected with a corresponding wiring terminal of the signal machine; the connecting terminal (32) is inserted into a cable box of the signal machine and is electrically connected with a corresponding connecting terminal of the signal machine;

the change-over switch (2) is arranged between the power supply terminal (31) and the connecting terminal (32), and the change-over switch (2) can switch and communicate one power supply terminal (31) and one connecting terminal (32).

2. The traffic signal detection device according to claim 1, further comprising an ammeter (4), the ammeter (4) being connected in series between the changeover switch (2) and the power supply terminal (31).

3. The semaphore detection device according to claim 2, further comprising a voltmeter (5), the voltmeter (5) being connected in parallel with the power supply terminal (31) for detecting the voltage at the power supply terminal (31).

4. The signal detection device according to claim 1, further comprising an ammeter (4), a voltmeter (5) and a buck rectifier module (6); the ammeter (4) is connected in series between the change-over switch (2) and the power supply terminal (31); the voltmeter (5) is connected with the power supply terminal (31) in parallel and is used for detecting the voltage at the power supply terminal (31); the primary input edge of the voltage-reducing rectifying module (6) is connected in parallel to the voltmeter (5), and the secondary output edge of the voltage-reducing rectifying module (6) is connected in parallel to the ammeter (4).

5. The annunciator detection device according to any one of claims 1, 2, 3 and 4, wherein the change-over switch (2) has not less than five gears, the number of the power supply terminals (31) is at least four, the number of the connection terminals (32) is at least four, the four power supply terminals (31) are inserted into the cable box on the annunciator and are electrically connected with the connection terminals corresponding to the four color signal lamps of the annunciator respectively, and the connection terminals (32) corresponding to the power supply terminals (31) are inserted into the cable box on the annunciator and are electrically connected with the connection terminals corresponding to the four color signal lamps of the annunciator respectively; the contact points corresponding to four gears of the change-over switch (2) are respectively connected with four power supply terminals (31) and four connecting terminals (32), and the change-over switch (2) can conduct one pair of the connected power supply terminals (31) and the connecting terminals (32).

6. The signal detecting device according to claim 4, wherein the conductive patch (3) further includes a flying terminal (33), four power supply terminals (31) are numbered 2, 4, 6, 8, four connection terminals (32) are 1, 3, 5, 7, a set of the connection terminal (32) No. 1 and the power supply terminal (31) No. 2, a set of the connection terminal (32) No. 3 and the power supply terminal (31) No. 4, a set of the connection terminal (32) No. 5 and the power supply terminal (31) No. 6, a set of the connection terminal (32) No. 7 and the power supply terminal (31) No. 8, 2, 4. no. 6 and No. 8 power supply terminals (31) are inserted into the cable box on the annunciator and are respectively and electrically connected with the corresponding wiring terminals of the four color signal lamps in the annunciator, and No. 1, No. 3, No. 5 and No. 7 connection terminals (32) are inserted into the cable box on the annunciator and are respectively and electrically connected with the corresponding wiring terminals; the change-over switch (2) is a knob switch, the change-over switch (2) has at least five gears, the connection points 11, 33, 55, 77 and 99 on one side of the change-over switch (2) are electrically communicated and connected with an ammeter, the connection points 00, 22, 44, 66 and 88 on the other side of the change-over switch (2) are respectively connected with the corresponding connection terminals 1, 3, 5 and 7, and the change-over switch (2) can conduct one group of power supply terminals (31) and the connection terminals (32);

an ammeter (4) is connected in series between the 11 terminal of the change-over switch (2) and the suspension terminal (33), a voltmeter (5) is arranged between the power supply terminal (31) and the suspension terminal (33), the primary input side of the step-down rectifying module (6) is connected in parallel to the voltmeter (5), and the secondary output side of the step-down rectifying module (6) is connected in parallel to the ammeter (4).

7. The semaphore detection device according to any of claims 1, 2, 3, and 4, further comprising a protective box (1), wherein the switch (2) is disposed inside the protective box (1), and wherein the power supply terminal (31) and the connection terminal (32) are disposed inside the protective box (1).