Universal motor train unit hand-held sliding plug door rubber strip anti-extrusion function measuring device

Abstract

The utility model discloses a universal motor train unit hand-held sliding plug door rubber strip anti-extrusion function measuring device, which comprises a hand-held terminal, one side of the hand-held terminal is provided with a fixed threaded hole, the inside of the hand-held terminal is fixedly connected with a sensor base, and one side of the hand-held terminal is provided with a single-chip microcomputer installation limiting groove. According to the universal motor train unit hand-held sliding-plug door rubber strip anti-extrusion function measuring device, a hand-held terminal is placed on the edge of a sliding-plug door frame, then a sliding-plug door is closed, a sensor fast plug and a high-pressure block are extruded, and a high-precision S-shaped pressure sensor is installed on a sensor base through bolts; the sensor can convert tiny deformation caused by mechanical pressure when the anti-extrusion rubber strip of the sliding plug door is activated into resistance change, then the resistance change is converted into accurate voltage or current signals through the Wheatstone bridge circuit and the signal conditioning circuit, and a single-chip microcomputer is installed in the single-chip microcomputer installation limiting groove. According to the device, lean maintenance item points of the sliding plug door are effectively increased.

Description

Technical Field

[0001] This utility model relates to the field of maintenance technology for sliding doors of rail transit EMU trains, specifically a universal handheld measuring device for measuring the anti-pinch function of the rubber strip of EMU sliding doors. Background Technology

[0002] With the rapid development of high-speed trains, a large number of trains are put into operation every day across the country. As a crucial component of high-speed trains, the sealing performance and safety of the sliding doors directly affect passenger comfort and travel experience. They are also a key factor in ensuring the safe operation of the train. If a sliding door malfunctions, in minor cases, mechanics need to isolate the faulty door, which will increase passenger flow at other, non-faulty doors, likely causing delays. In severe cases, the door cannot be closed, forcing the train to make an emergency stop and requiring assistance. Therefore, the maintenance of sliding doors is a vital part of the repair work.

[0003] To prevent passengers or their belongings and luggage from being squeezed during the closing process, the plug doors of high-speed trains are equipped with anti-pinch functions. However, with the gradual increase in the airtightness requirements of the train body, such as the current requirement that the time for the internal pressure to drop from 4000pa to 1000pa should not be less than 50 seconds, the plug doors must ensure normal opening and closing operations while meeting the airtightness requirements of the train body under certain aerodynamic loads. This places higher demands on the implementation of the anti-pinch function.

[0004] The operation of the sliding door adopts a planned preventive maintenance model. During routine maintenance, personnel test the anti-pinch function of the sliding door using multi-angle pressure methods. The evaluation standard is that when the sliding door encounters an obstacle, it should pause and then attempt to close again three times. If the obstacle persists, the door should automatically reopen. Before testing, it must be confirmed that the power supply voltage is DC110V (+25% / -30%) and the sliding door's rubber seals are not inflated. During measurement, the maintenance personnel first open the sliding door, holding a rubber rod and placing it approximately 1.5 meters above the top of the door, 1 meter in the middle, and 0.5 meters below. The door is then closed, and with the door lock switch not activated, the anti-pinch function's detection cycle is checked to ensure it operates normally, thus comprehensively evaluating the effectiveness of the anti-pinch function.

[0005] Through on-site investigation, the following pain points were found in the current maintenance plan: (1) Manual subjective judgment, time-consuming and poor standardization: The current maintenance plan mainly relies on manual operation to conduct multi-angle compression tests. This method is not only time-consuming, but also has low accuracy and repeatability. Furthermore, due to the differences in skills and experience of maintenance personnel and the subjectivity of manual operation, it is difficult to guarantee the standardization and consistency of each test, thus affecting the reliability of the test results; (2) There are blind spots in the detection, and small objects cannot be detected, resulting in poor accuracy: The detection of the anti-compression function of the sliding door is mainly focused on the reaction of the door to obstacles during the closing process, but the detection is only carried out when the door is not completely locked. Once the door reaches the locked position or there are small obstacles (such as a baby's hand), the anti-pinch sensing strip will fail. This means that after the door is fully closed, any safety hazards caused by operational errors or small obstacles cannot be detected by routine inspection, which greatly reduces the safety coverage of the inspection plan; (3) The physical blocking simulation method is inefficient and reduces the service life of the plug door: The current inspection tools and methods are relatively primitive and mainly rely on hand-held glue sticks to simulate physical blocking. This method is not only inefficient, but also poses certain safety risks in actual operation. Maintenance personnel need to perform complex physical operations in the electric environment of the train, which may reduce the service life of the plug door and increase the workload and safety hazards; (4) Performance judgment is limited and indicators cannot be quantified: The existing inspection plan cannot quantify the anti-pinch performance of the plug door strip, which makes it impossible to predict the trend of the strip's life and the risk of failure, limiting the in-depth understanding of the anti-pinch strip performance and the optimization of maintenance strategies. Utility Model Content

[0006] The purpose of this utility model is to provide a universal handheld measuring device for the anti-squeezing function of the rubber strip of a high-speed train, so as to solve the problems mentioned in the background art, such as long time consumption and poor standardization of manual subjective judgment, blind spots in detection and inability to detect small objects with poor accuracy, low efficiency of physical obstruction simulation method reducing the service life of the rubber strip, and limited performance judgment and inability to quantify indicators.

[0007] The present invention adopts the following technical solution:

[0008] A universal handheld measuring device for the anti-pinch function of the sliding door rubber strip on high-speed trains includes a handheld terminal. A fixed threaded hole is provided on one side of the handheld terminal. A sensor base is fixedly connected inside the handheld terminal. A microcontroller mounting limit groove is provided on one side of the handheld terminal. A battery compartment is provided inside the handheld terminal. A top cover is movably connected to one side of the handheld terminal. A sensor pressure block is movably connected to one side of the top cover. A sensor quick-connect high-pressure block is movably connected to one side of the sensor pressure block. An LED work indicator is fixedly connected to one side of the top cover. By placing the handheld terminal on the edge of the sliding door frame and then closing the sliding door, the sensor quick-connect high-pressure block is squeezed. A high-precision S-type pressure sensor is bolted to the sensor base. This sensor can convert the minute deformation caused by the mechanical pressure when the anti-pinch rubber strip of the sliding door is activated into a change in resistance. This change in resistance is then converted into a precise voltage or current signal through a Wheatstone bridge circuit and a signal conditioning circuit. The microcontroller is mounted in a mounting limit slot. The microcontroller and wireless transmission module are mounted in the mounting limit slot via bolts. The microcontroller integrates an analog-to-digital converter (ADC) that converts the analog signal output from the pressure sensor into a digital signal and calculates the precise pressure value. This value is then transmitted wirelessly to the digital display slave or handheld terminal for real-time data display and storage. A power supply is located in the battery compartment to power the entire device. The digital display slave consists of a housing and a screen, primarily used for controlling, receiving, and recording measured pressure data. The housing protects the screen and internal circuit components, while the screen provides a human-machine interface, ensuring both the device's strength and portability. Additionally, a wrist strap can be fitted to the digital display slave for easy maintenance and operation. To enhance the device's protective performance, silicone protective sleeves are installed at key contact points between the sensor and the sliding door seal, preventing damage during pressure from the sliding door and extending its lifespan. In addition, to adapt to the measurement needs of different vehicle models, an adapter pressure block and a sensor quick-connect high-voltage block are installed above the sensor. The sensor quick-connect high-voltage block is connected by magnetic attraction, which makes installation quick and easy to use.

[0009] More preferably, a sensor pressing block is provided with a sensor pressing block fixing threaded hole on one side, and a magnet mounting hole is provided on one side of the sensor pressing block.

[0010] More preferably, a guide groove is provided on one side of the sensor pressure block, and a guide boss is slidably connected to the inner wall of the guide groove.

[0011] More preferably, a digital display slave unit is provided on one side of the handheld terminal, and a housing is provided on one side of the digital display slave unit.

[0012] More preferably, a screen is fixedly connected to one side of the digital display slave unit, and a switch hole is provided on one side of the digital display slave unit.

[0013] More preferably, a charging port is provided on one side of the digital display slave device, and the switch port and the charging port are square.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] In this invention, a handheld terminal is placed on the edge of a sliding door frame, and then the sliding door is closed. A pressure sensor is quickly inserted into the high-pressure block, and a high-precision S-type pressure sensor is bolted to the sensor base. This sensor converts the minute deformation caused by the mechanical pressure on the anti-pinch rubber strip of the sliding door into a change in resistance. This change in resistance is then converted into a precise voltage or current signal via a Wheatstone bridge circuit and a signal conditioning circuit. A microcontroller is mounted in a limiting slot, and the microcontroller and wireless transmission module are bolted into the limiting slot. The microcontroller's integrated analog-to-digital converter (ADC) converts the analog signal output by the pressure sensor into a digital signal and calculates the precise pressure value. The data is transmitted wirelessly to a digital display slave unit or handheld terminal for real-time display and storage. A power supply is located in the battery compartment to power the entire device. The digital display slave unit, consisting of a housing and a screen, primarily controls, receives, and records measured pressure data. The housing protects the screen and internal circuit components, while the screen provides a human-machine interface, ensuring both structural strength and portability. A wrist strap can be fitted to the slave unit for easy operation and maintenance. To enhance protection, silicone protective sleeves are installed at key contact points between the sensor and the sliding door seal, preventing damage during pressure and extending the unit's lifespan. Furthermore, to accommodate different vehicle models, an adapter pressure block and a sensor quick-connect pressure block are installed above the sensor. The sensor quick-connect pressure block uses magnetic connection for quick and easy installation. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the three-dimensional cross-sectional structure of the present invention. Figure 1 ;

[0018] Figure 3 This is a schematic diagram of the three-dimensional cross-sectional structure of the present invention. Figure 2 ;

[0019] Figure 4 This is a schematic diagram of the partial explosion structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the three-dimensional cross-sectional structure of the present invention. Figure 3 ;

[0021] Figure 6 This is a schematic diagram of the partially disassembled structure of this utility model.

[0022] The accompanying figures are labeled as follows:

[0023] 1-Handheld terminal; 2-Fixing threaded hole; 3-Sensor base; 4-Microcontroller mounting limit groove; 5-Battery compartment; 6-Top cover; 7-Sensor clamping block; 8-Sensor quick-connect high voltage block; 9-LED working indicator light; 10-Sensor clamping block fixing threaded hole; 11-Magnet mounting hole; 12-Guide groove; 13-Guide boss; 14-Digital display slave unit; 15-Housing; 16-Screen; 17-Switch hole; 18-Charging hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0027] Please see Figure 1 - Figure 6This utility model provides a technical solution: a universal handheld measuring device for the anti-pinch function of the sliding door rubber strip on high-speed trains, including a handheld terminal 1. A fixed threaded hole 2 is provided on one side of the handheld terminal 1. A sensor base 3 is fixedly connected inside the handheld terminal 1. A microcontroller mounting limit groove 4 is provided on one side of the handheld terminal 1. A battery compartment 5 is provided inside the handheld terminal 1. A top cover 6 is movably connected to one side of the handheld terminal 1. A sensor pressure block 7 is movably connected to one side of the top cover 6. A sensor quick-connect high-pressure block 8 is movably connected to one side of the sensor pressure block 7. An LED work indicator light 9 is fixedly connected to one side of the top cover 6. By placing the handheld terminal 1 on the edge of the sliding door frame and then closing the sliding door, the sensor quick-connect high-pressure block 8 is squeezed. A high-precision S-type pressure sensor is installed on the sensor base 3 by bolts. This sensor can convert the minute deformation caused by the mechanical pressure when the anti-pinch rubber strip of the sliding door is activated into a change in resistance. Then, through a Wheatstone bridge circuit and a signal conditioning circuit, this change in resistance is converted into a precise voltage or current signal. The microcontroller is mounted in mounting limit slot 4. The microcontroller and wireless transmission module are mounted in mounting limit slot 4 via bolts. The microcontroller integrates an analog-to-digital converter (ADC) that converts the analog signal output from the pressure sensor into a digital signal and calculates the precise pressure value. This value is then transmitted wirelessly to the digital display slave unit 14 or handheld terminal 1 for real-time data display and storage. The battery compartment 5 contains a power supply to power the entire device. The digital display slave unit 14 consists of a housing 15 and a screen 16, primarily used for controlling, receiving, and recording measured pressure data. The housing 15 protects the screen 16 and internal circuit components, while the screen 16 provides a human-machine interface, ensuring both the device's strength and portability. Furthermore, the digital display slave unit 14 can be equipped with a wrist strap for easy maintenance by attaching it to the wrist. To enhance the device's protective performance, silicone protective sleeves are installed at key points where the sensor contacts the sliding door seal, preventing damage during pressure from the sliding door and extending its service life. In addition, to adapt to the measurement needs of different vehicle models, an adapter pressure block and a sensor quick-connect high voltage block 8 are installed above the sensor. The sensor quick-connect high voltage block 8 is connected by magnetic attraction, which makes installation quick and easy to use.

[0028] In this embodiment, as Figure 1 , Figure 2 and Figure 6 As shown, a sensor block 7 has a sensor block fixing threaded hole 10 on one side and a magnet mounting hole 11 on the other side.

[0029] In this embodiment, as Figure 1 , Figure 3 and Figure 5As shown, a guide groove 12 is provided on one side of the sensor block 7, and a guide boss 13 is slidably connected to the inner wall of the guide groove 12.

[0030] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, a digital display slave unit 14 is provided on one side of the handheld terminal 1, and a housing 15 is provided on one side of the digital display slave unit 14.

[0031] In this embodiment, as Figure 1 As shown, a screen 16 is fixedly connected to one side of the digital display slave unit 14, and a switch hole 17 is provided on one side of the digital display slave unit 14.

[0032] In this embodiment, as Figure 1 As shown, a charging port 18 is provided on one side of the digital display slave unit 14, and the switch port 17 and the charging port 18 are square.

[0033] The usage method and advantages of this utility model: The working process of this universal handheld plug door rubber strip anti-pinch function measuring device for high-speed trains is as follows:

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, by placing the handheld terminal 1 on the edge of the sliding door frame, and then closing the sliding door, the pressure sensor is quickly inserted into the high-pressure block 8. The sensor base 3 is bolted to a high-precision S-type pressure sensor. This sensor can convert the minute deformation caused by the mechanical pressure when the anti-pinch rubber strip of the sliding door is activated into a change in resistance. Then, through a Wheatstone bridge circuit and a signal conditioning circuit, this change in resistance is converted into a precise voltage or current signal. The microcontroller is mounted in the mounting limit slot 4. The mounting limit slot 4 is bolted to the microcontroller and the wireless transmission module. The microcontroller integrates an analog-to-digital converter (ADC) of the transmitter module to convert the analog signal output by the pressure sensor into a digital signal. The analog signal is converted into a digital signal, and the precise pressure value is calculated. Then, it is transmitted to the digital display slave unit 14 or the handheld terminal 1 via a wireless transmission module to realize the real-time display and storage of data. The battery compartment 5 is equipped with a power supply to power the entire device. The digital display slave unit 14 consists of a housing 15 and a screen 16. It is mainly used to control, receive, and record the measured pressure data. The housing 15 is used to protect the screen 16 and internal circuit components. The screen 16 provides a human-machine interface, which ensures the strength of the device and improves its portability. In addition, the digital display slave unit 14 can be equipped with a wrist strap to make it easy for maintenance personnel to fix it on their wrist for convenient operation and maintenance.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims.

Claims

1. A universal handheld measuring device for the anti-crushing function of a plug door seal on a high-speed train, comprising a handheld terminal (1), characterized in that: The handheld terminal (1) has a fixed threaded hole (2) on one side, a sensor base (3) is fixedly connected inside the handheld terminal (1), a microcontroller mounting limit groove (4) is provided on one side of the handheld terminal (1), a battery compartment (5) is provided inside the handheld terminal (1), a top cover (6) is movably connected to one side of the handheld terminal (1), a sensor pressure block (7) is movably connected to one side of the top cover (6), a sensor quick-connect high voltage block (8) is movably connected to one side of the sensor pressure block (7), and an LED working indicator light (9) is fixedly connected to one side of the top cover (6).

2. The universal handheld plug door rubber strip anti-crushing function measuring device for high-speed trains according to claim 1, characterized in that: The sensor block (7) has a sensor block fixing threaded hole (10) on one side and a magnet mounting hole (11) on one side.

3. The universal handheld plug door rubber strip anti-crushing function measuring device for high-speed trains according to claim 1, characterized in that: The sensor block (7) has a guide groove (12) on one side, and a guide boss (13) is slidably connected to the inner wall of the guide groove (12).

4. The universal handheld plug door rubber strip anti-crushing function measuring device for high-speed trains according to claim 1, characterized in that: A digital display slave device (14) is provided on one side of the handheld terminal (1), and a housing (15) is provided on one side of the digital display slave device (14).

5. A universal handheld plug door rubber strip anti-crushing function measuring device for high-speed trains according to claim 4, characterized in that: A screen (16) is fixedly connected to one side of the digital display slave unit (14), and a switch hole (17) is opened on one side of the digital display slave unit (14).

6. The universal handheld plug door rubber strip anti-crushing function measuring device for high-speed trains according to claim 5, characterized in that: The digital display slave device (14) has a charging port (18) on one side, and the switch port (17) and the charging port (18) are square.

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