CN218673529U

CN218673529U - Low-cost shielding door clearance detection system

Info

Publication number: CN218673529U
Application number: CN202221455252.XU
Authority: CN
Inventors: 崔惠珊
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2023-03-21
Anticipated expiration: 2032-06-10

Abstract

The utility model discloses a low-cost shield door clearance detection system relates to urban rail transit platform shield door clearance detection system technical field, specifically is a low-cost shield door clearance detection system, including signal system, 2002 safety computer, range sensor and erection column, the inside of safety computer is provided with CPU1 and CPU2 respectively, range sensor's quantity has threely. This low-cost shield door clearance detection system, through the setting of range sensor and erection column, make this low-cost shield door clearance detection system possess and used single train door to realize the clearance to survey as the target, have the low-cost, the effect that debugging work load is few, adopt range sensor to carry out clearance detection, whether the clearance presss from both sides the foreign matter is judged with the distance threshold value through negotiation range sensor's detection distance, a plurality of sensors each other is redundant can avoid the single-point trouble simultaneously, the purpose that has reached the improvement practicality.

Description

Low-cost shielding door clearance detection system

Technical Field

The utility model relates to an urban rail transit platform shield door clearance detection system technical field specifically is a low-cost shield door clearance detection system.

Background

With the development of the urbanization process, the demand for urban rail transit becomes larger and larger, and subways are applied more and more as underground rail transit. Due to the convenience and rapidness of subways, the pedestrian flow of subway stations is usually large, and some unsafe factors are brought. In order to improve the safety, the following technologies are widely applied to the shield door: 1. obstacle detection system: when the sliding door is blocked to close (the door closing force is controlled at 150N), the door operating mechanism can detect the existence of an obstacle and release the door closing force, the door closing force is released immediately when the obstacle is met in the door closing process, the door is closed again after the door stops (the pause time is adjustable within the range of 0-10 seconds), the door cannot be closed after being closed repeatedly for N times (the times are adjustable), and the sliding door is in a free state or is opened and gives an alarm. 2. The opening and closing states of the sliding door of the shielding door are connected in series with a system safety loop, all the sliding doors of the shielding door are closed, and the locking states are connected with signals through hard wires, so that the operation safety is ensured.

The shielding door gap detection system with low cost has the safety level of SIL-4, and has the characteristics of low cost, high accuracy, simplicity in installation and debugging and the like.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a low-cost shield door clearance detecting system has solved the problem of proposing among the above-mentioned background art.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides a low-cost shield door clearance detecting system, includes signal system, 2002 safety computer, range finding sensor and erection column, the inside of safety computer is provided with CPU1 and CPU2 respectively, range finding sensor's quantity has threely, and is three range finding sensor is range finding sensor 1, range finding sensor 2 and range finding sensor 3 respectively, range finding sensor's kind is laser sensor and ultrasonic ranging sensor respectively, and is three range finding sensor all installs at the top of erection column, and is three range finding sensor is equidistant or is not equidistant arranges, through wire electric connection between CPU1 and the CPU2, CPU1 and CPU2 pass through the wire respectively with range finding sensor 1, range finding sensor 2 and range finding sensor 3 electric connection.

Optionally, the 2002 secures a communication cable between the computer and the signaling system.

Optionally, the range of the laser sensor is 8 meters, the distance resolution is 1cm, the detection distance of the ultrasonic ranging sensor can reach 6 meters, the resolution is 2mm, and the repetition precision is 3mm.

Optionally, the detection ranges of the three distance measuring sensors are mutually covered, and a 3-out-of-2 logic is required to be adopted among the three distance measuring sensors.

(III) advantageous effects

The utility model provides a low-cost shield door clearance detection system possesses following beneficial effect:

1. this low-cost shield door clearance detection system, through the setting of range sensor and erection column, make this low-cost shield door clearance detection system possess and used single train door to realize the clearance to survey as the target, have low-cost, the effect that debugging work load is few, adopt range sensor to carry out clearance detection, whether the clearance presss from both sides the foreign matter is judged with the distance threshold value through negotiation range sensor's detection distance, a plurality of sensors each other is redundant can avoid the single-point trouble simultaneously, the purpose that has reached the improvement practicality.

2. According to the low-cost shielding door gap detection system, through the arrangement of the signal system and the 2002 safety computer, the low-cost shielding door gap detection system has the effect of a gap detection system capable of realizing SIL-4 safety level, the SIL-4 functional safety level is realized by adopting an embedded processor and a safety computer platform technology, and the purpose of improving the practicability is achieved by taking a single vehicle door as a detection object.

Drawings

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

FIG. 2 is a schematic structural view of the working principle of the present invention;

FIG. 3 is a schematic structural view of the sensor mounting position of the present invention;

fig. 4 is a schematic structural diagram of a sensor deployment method of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Example 1

Referring to fig. 1 to 4, the present invention provides a technical solution: the utility model provides a shield door clearance detecting system of low-cost, includes signal system, 2002 safety computer, range finding sensor and erection column, communication cable between 2002 safety computer and the signal system, it is three range finding sensor's detection range covers each other, and is three need adopt 3 to get 2 logics between the range finding sensor, range finding sensor's quantity has threely, and is three range finding sensor is range finding sensor 1, range finding sensor 2 and range finding sensor 3 respectively, range finding sensor's kind is laser sensor and ultrasonic ranging sensor respectively, laser sensor's range 8 meters, range resolution 1cm, ultrasonic ranging sensor's detection distance can reach 6 meters, resolution ratio 2mm, repeatability 3mm, and is three range finding sensor all installs at the top of erection column, and is three range finding sensor is equidistant or the unequal interval arranges.

When the device is used, the mounting column is mounted on the ground, three distance measuring sensors are mounted at equal intervals or unequal intervals, a plurality of redundant distance measuring sensors are used for detecting people or foreign matters between gaps, 3 distance measuring sensors are arranged on each platform door, 2 logic of 3 is needed to be adopted among the three distance measuring sensors, namely, the three distance measuring sensors consider that the foreign matters exist as long as two of the three distance measuring sensors detect the foreign matters, the laser sensors emit laser light by the sensors, the sensors receive emitted light after diffuse reflection of a shielding object, then the distance is calculated, the laser sensors are 8 meters in range and 1cm in distance resolution, the ultrasonic distance measuring sensors calculate the time difference between the emitted sound wave pulse and the received sound wave pulse, multiply the sound wave speed, then the time difference is divided by 2 to obtain the distance between the sensors and the object to be detected, the detection distance of the ultrasonic distance measuring sensors can reach 6 meters, the resolution is 2mm, the repetition precision is 3mm, the distance measuring sensor product adopts standard industrial products, a plurality of suppliers exist, meanwhile, each manufacturer provides a standard M12 connector with the same size, the cost is low, whether the foreign matters exist in the gap, and the key distance is considered as the detection distance after the key distance is measured, namely, and the threshold value of the obstacle is considered. The whole judgment threshold value is related to the installation position of the sensor, and if the distance measured by the distance measuring sensor is greater than L1 and less than L2, the condition that the family is detected by a shelter or a gap in the door left side upright post and the door right side upright post in the detection range is shown. The minimum value of the threshold is L1, and the maximum value of the threshold is L2. Because the sensor has the maximum detection range, the distance between the installation position of the distance measuring sensor and the upright post on the right side of the door is ensured to be less than the maximum detection distance during installation. Since the distance from the sensor is greater than the detection dead zone, L1 should be greater than the detection dead zone. The blind areas of different sensor products are different, and the distance of L1 needs to be confirmed according to actual product parameters. Because the sensor adopts the principle of diffuse reflection instead of the principle of correlation, the other side of the sensor is not required to be provided with receiving equipment, the transmitting equipment and the receiving equipment are not required to be adjusted and aligned, and the workload of installation and daily maintenance is reduced. Three or more sensors are adopted to ensure that when one sensor fails, a plurality of sensors still transmit data, and single-point failure is prevented. And because the detection space is a vertical range from top to bottom, a plurality of sensors can realize various coverage. The three ranging sensors are arranged at equal intervals or unequal intervals, and detection ranges among the three ranging sensors are mutually covered, so that each ranging sensor is at least covered by two ranging sensors.

Example 2

Referring to fig. 1 to 4, the present invention provides a technical solution: the utility model provides a shield door clearance detecting system of low cost, the inside of safety computer is provided with CPU1 and CPU2 respectively, through wire electric connection between CPU1 and the CPU2, CPU1 and CPU2 pass through the wire respectively with range sensor 1, range sensor 2 and range sensor 3 electric connection.

When the system is used, the 2OO2 safety computer consists of two CPUs, a core processor for gap detection is used for triggering a distance measuring sensor to measure distance, receiving and processing data of the distance measuring sensor and transmitting the data to a signal system, a communication cable between the 2OO2 safety computer and the signal system CAN adopt various technologies such as a CAN bus, an Ethernet, an RS485 and the like, an RSSP-1 safety communication protocol is adopted between the 2OO2 safety computer and the signal system to ensure the integrity and safety of data of communication contents and ensure the correctness of communication between the safety computer and the signal system, a 2OO2 safety computer platform refers to that the two CPUs work independently, respectively receive the data transmitted by the sensors, perform independent operation processing, respectively send the received data to the opposite side, continuously compare the two data of each CPU, and if the received data is consistent with the calculation record, the processing is considered to be correct and CAN be output. According to the requirements of standards such as IEC 61508 and EN50128/5019, 2OO2 can realize the function safety level of SIL-4. The CPU1 and CPU2 of the secure computer platform of 2OO2 may employ embedded processors with or without security authentication.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a shield door clearance detecting system of low-cost, includes signal system, 2002 safety computer, range finding sensor and erection column, its characterized in that: the inside of safety computer is provided with CPU1 and CPU2 respectively, distance measuring sensor's quantity has threely, and is three distance measuring sensor is distance measuring sensor 1, distance measuring sensor 2 and distance measuring sensor 3 respectively, distance measuring sensor's kind is laser sensor and ultrasonic ranging sensor respectively, and is three distance measuring sensor all installs at the top of erection column, and is three distance measuring sensor is equidistant or is not equidistant arranges, through wire electric connection between CPU1 and the CPU2, CPU1 and CPU2 pass through the wire respectively with distance measuring sensor 1, distance measuring sensor 2 and distance measuring sensor 3 electric connection.

2. A low cost barrier door gap sensing system according to claim 1, wherein: the 2002 secures the communication cable between the computer and the signaling system.

3. A low cost barrier door gap sensing system according to claim 1, wherein: the range of the laser sensor is 8 meters, the distance resolution is 1cm, the detection distance of the ultrasonic ranging sensor can reach 6 meters, the resolution is 2mm, and the repetition precision is 3mm.

4. A low cost barrier door gap sensing system according to claim 1, wherein: the detection ranges of the three distance measuring sensors are mutually covered, and a 3-out-of-2 logic is required to be adopted among the three distance measuring sensors.