Method, system and terminal for detecting overspeed of inclined mine car using photoelectric sensor

Abstract

The present invention belongs to the technical field of mine detection equipment and discloses a method, system and terminal for detecting overspeed of inclined mine cars using photoelectric sensors. The system uses a state detection component composed of three groups of photoelectric sensors to detect the moment when the inclined mine car passes through and feeds back a detection signal to a microprocessor, wherein the state detection component is connected to the microprocessor; the microprocessor performs comprehensive calculation and analysis on the detection signal, and when it is determined that the running speed of the inclined mine car exceeds the set speed, the control center sends out a corresponding alarm signal. The method of detecting overspeed of inclined mine cars using photoelectric sensors of the present invention uses a set microprocessor to perform comprehensive analysis on the signals of the state detection component composed of three groups of photoelectric sensors, accurately and timely detecting overspeed of mine cars caused by unhooking, broken ropes, etc., overcoming the disadvantage that conventional encoders cannot detect the speed of mine cars under corresponding working conditions, and will not falsely report overspeed signals when people walk in both directions along the tunnel.

Description

Technical Field

[0001] The present invention belongs to the technical field of mine detection equipment, and in particular relates to a method, system and terminal for detecting overspeed of inclined mine vehicles using a photoelectric sensor. Background Art

[0002] Coal, a vital resource in my country, has long been mined. However, most coal resources are buried deep underground, requiring underground transportation via inclined tunnels. Therefore, safe transportation underground is crucial for safe coal production. The greatest safety hazard associated with inclined tunnel transportation is runaway accidents. These accidents occur when a mine car, used to lower equipment, hoist materials, and transport coal, loses control due to a broken rope, unhooking, or misoperation. Under the influence of its own gravity, the car moves abnormally along the track. Therefore, the importance of runaway prevention devices is self-evident.

[0003] At present, the common practice for detecting the speed of inclined tunnel mine cars is to calculate the speed of the mine car hook head through the encoder of the gearbox main shaft. However, when the hook is unhooked or the rope is broken, the speed of the mine car cannot be detected.

[0004] Through the above analysis, the problems and defects of the existing technology are: in the current method of calculating the speed of the mine car hook head through the gear box main shaft encoder, the speed of the mine car cannot be detected when unhooking or rope breaking occurs. Summary of the Invention

[0005] In response to the problems existing in the prior art, the present invention provides a method, system and terminal for detecting overspeed of inclined mine cars using photoelectric sensors.

[0006] The present invention is implemented as follows: a method for detecting overspeeding of inclined mine cars using photoelectric sensors, the method for detecting overspeeding of inclined mine cars using photoelectric sensors comprising: three groups of photoelectric sensors are installed on both sides of the tunnel above the gate railing of the inclined shaft car protection device; the system uses a status detection component composed of three groups of photoelectric sensors to detect the moment when the inclined shaft mine car passes, and feeds back a detection signal to a microprocessor, wherein the status detection component is connected to the microprocessor; the microprocessor performs comprehensive calculation and analysis on the detection signal, and when it is determined that the running speed of the inclined shaft mine car exceeds the set speed, the control center sends a corresponding alarm signal to the outside.

[0007] Furthermore, the method of using photoelectric sensors to detect speeding of inclined mine cars also includes: the photoelectric sensor is connected to the control center using a normally closed contact. When there are no mine cars or pedestrians passing by, the control center continues to receive the sensor signal to determine that the photoelectric sensor is working normally; when there are mine cars or pedestrians passing by, the photoelectric sensor is blocked, so that the photoelectric sensor receiving end cannot receive the infrared signal emitted by the photoelectric sensor, and the control center cannot receive the response signal of the photoelectric sensor. When the control center does not receive the response signal of the photoelectric sensor for a period of time, it is determined that the sensor may have failed, and the control center sends an alarm signal to prompt the operator to check; a sensor status display screen is designed on the display in the control room of the control center, and the photoelectric sensor lights up a green signal light when it is not blocked, and the signal light shows red when the photoelectric sensor is blocked.

[0008] Furthermore, the method for detecting overspeed of an inclined mine car using a photoelectric sensor comprises the following steps:

[0009] Step 1: Arrange three sets of photoelectric sensors at a certain distance above the vehicle barrier along the roadway; calculate the time (T12min) for the mine car to pass through the first and second sets of photoelectric sensors, and the time (T23min) for the second and third sets of sensors, based on the maximum allowable speed of the mine car;

[0010] Step 2: Under the premise that the photoelectric sensors at the second speed measuring point and the third speed measuring point do not receive a position change signal, when the first group of photoelectric sensors generates a position change signal, it is considered that the mine car has reached the first speed measuring point. The microprocessor sets a flag that the mine car has reached the first speed measuring point, and the microprocessor starts timing.

[0011] Step 3: After the mine car passes through the first speed measuring point and the third group of photoelectric sensors does not change position, when the second group of photoelectric sensors generates a change signal, it is considered that the mine car has reached the second speed measuring point. A flag for the mine car to reach the second speed measuring point is set, and the microprocessor calculates the time T12 when the mine car passes through the first and second groups of photoelectric sensors.

[0012] Step 4: When the mine car reaches the first speed measuring point and the second speed measuring point mark changes, the mine car is deemed to have reached the third speed measuring point when the third group of photoelectric sensors changes signal. The microprocessor calculates the time T23 between the mine car passing the second and third groups.

[0013] Step 5: When the head of the mine car descends and reaches the third speed measuring point, the time it takes for the mine car to pass through the first and second speed measuring intervals and the time it takes for the second and third speed measuring intervals to pass is calculated. If the time of the first and second speed measuring intervals and the time of the second and third speed measuring intervals are both greater than zero and less than the time corresponding to the maximum allowable speed, the mine car is determined to be speeding.

[0014] Furthermore, the installation method of the three groups of photoelectric sensors in step one also includes: installing the three groups of photoelectric sensors between the top of the tunnel and the ground track.

[0015] Furthermore, the time of the first and second speed measurement intervals and the time of the second and third speed measurement intervals in step five are both greater than zero and less than the time corresponding to the maximum allowed speed, including: T12>0, T23>0, T12 <T12min、T23<T23min。

[0016] Furthermore, the method for detecting overspeeding of inclined mine cars using a photoelectric sensor also includes: when the mine car rope breaks, the first mine car overspeeds first, so only the speed of the first descending mine car is detected.

[0017] Another object of the present invention is to provide a system for detecting overspeed of an inclined mine car using a photoelectric sensor, which is applied to the method for detecting overspeed of an inclined mine car using a photoelectric sensor. The system for detecting overspeed of an inclined mine car using a photoelectric sensor comprises:

[0018] The time detection module is used to detect the time when the inclined mine car passes by using a state detection component composed of three groups of photoelectric sensors connected to the microprocessor, and feed back the detection signal to the microprocessor;

[0019] The signal analysis module is used to perform comprehensive calculation and analysis on the detection signal using a microprocessor. When it is determined that the running speed of the inclined shaft mine car exceeds the set speed, a corresponding alarm signal is sent out.

[0020] Another object of the present invention is to provide a computer device, which includes a memory and a processor. The memory stores a computer program. When the computer program is executed by the processor, the processor executes the steps of the method for detecting overspeed of inclined mine cars using photoelectric sensors.

[0021] Another object of the present invention is to provide a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the processor executes the steps of the method for detecting overspeed of an inclined mine car using a photoelectric sensor.

[0022] Another object of the present invention is to provide an information data processing terminal, which is used to implement the system for detecting overspeed of inclined mine cars using photoelectric sensors.

[0023] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the present invention are as follows:

[0024] First, the method provided by the present invention uses a photoelectric sensor to detect the speeding of inclined mine cars. The microprocessor provided uses a comprehensive analysis of the signal of the status detection component to accurately and timely detect the speeding of the mine car caused by unhooking, broken rope, etc., and will not falsely report the speeding signal when people walk in both directions along the tunnel.

[0025] Second, the system of the present invention for detecting overspeed of inclined mine cars using photoelectric sensors is applied to the inclined shaft running car protection device, which overcomes the disadvantage that conventional encoders cannot detect the speed of mine cars under working conditions such as unhooking and rope breaking.

[0026] Third, the present invention not only solves the problem that the inclined shaft running car protection device relies on the transport winch main shaft encoder to be unable to monitor the speeding of the mine car when the mine car is unhooked or the rope is broken, but also the present invention uses three groups of photoelectric sensors plus corresponding logical operations to filter out the overspeed false signals caused by bidirectional personnel walking, thereby solving the technical problem that pedestrian movement will cause false alarm of overspeed signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 This is a flow chart of a method for detecting overspeed of an inclined mine car using a photoelectric sensor provided by an embodiment of the present invention;

[0029] Figure 2 This is an interactive diagram of a system for detecting overspeed of inclined mine vehicles using a photoelectric sensor, provided by an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the arrangement of the photoelectric sensors provided by the embodiment of the present invention.

[0031] Figure 4 This is a schematic diagram of logic signals of a photoelectric sensor provided by an embodiment of the present invention;

[0032] In the figure: 1, the first speed measuring point; 2, the second speed measuring point; 3, the third speed measuring point; 4, the photoelectric sensor signal of the first speed measuring point; 5, the photoelectric sensor signal of the second speed measuring point; 6, the photoelectric sensor signal of the third speed measuring point; 1A, the status flag of the descending mine car arriving at the first speed measuring point; 2A, the status flag of the descending mine car arriving at the second speed measuring point; 3A, the status flag of the mine car arriving at the third speed measuring point; Me, the status flag of the first train of mine cars after passing the third speed measuring point; T12, the time when the first train of mine cars passes the first and second groups of photoelectric sensors; T23, the time when the first train of mine cars passes the second and third groups of photoelectric sensors; M1, the mine car overspeeding flag. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] In view of the problems existing in the prior art, the present invention provides a method, system and terminal for detecting overspeed of inclined mine cars using photoelectric sensors. The present invention is described in detail below with reference to the accompanying drawings.

[0035] like Figure 1 As shown, the method for detecting overspeed of an inclined mine car using a photoelectric sensor provided by an embodiment of the present invention includes the following steps:

[0036] S101, using a state detection component consisting of three groups of photoelectric sensors connected to a microprocessor to detect the time when the inclined shaft mine car passes, and feeding back a detection signal to the microprocessor;

[0037] S102, using a microprocessor to perform comprehensive calculation and analysis on the detection signal, when it is determined that the running speed of the inclined shaft mine car exceeds the set speed, the control center sends out a corresponding alarm signal.

[0038] As an optimization solution of the above technical solution, the details are as follows:

[0039] S101: Install three sets of photoelectric sensors, each placed at different locations along the route of the inclined mine car. A status detection component connected to a microprocessor uses these photoelectric sensors to detect when the inclined mine car passes. When the mine car passes through the photoelectric sensors, the sensors provide a detection signal to the microprocessor.

[0040] S102: The microprocessor performs a comprehensive analysis of the detection signals fed back by the three sets of photoelectric sensors to calculate the operating speed of the inclined mine car. If the mine car's speed exceeds the set speed, the microprocessor sends an alarm signal to the control center so that appropriate measures can be taken, such as slowing down or stopping the mine.

[0041] The embodiment of the present invention adopts three groups of photoelectric sensors, and the photoelectric sensors are installed in the following manner: three groups of photoelectric sensors are arranged at a certain distance above the vehicle barrier along the lane; based on the maximum allowable speed of the mine car, the time T12min for the mine car to pass through the first and second groups of photoelectric sensors and the time T23min for the second and third groups of sensors are calculated respectively.

[0042] On the premise that the second speed measurement point photoelectric sensor and the third speed measurement point photoelectric sensor do not receive displacement signals, when the first group of photoelectric sensors generate displacement signals, it is regarded that the ore car reaches the first speed measurement point during its downward travel. The microprocessor sets the flag that the ore car reaches the first speed measurement point during its downward travel, and the microprocessor starts timing.

[0043] On the premise that the third group of photoelectric sensors do not generate displacements after the ore car passes the first speed measurement point during its downward travel, when the second group of photoelectric sensors generate displacement signals, it is regarded that the ore car reaches the second speed measurement point during its downward travel. Set the flag that the ore car reaches the second speed measurement point during its downward travel, and the microprocessor calculates the time T12 for the ore car to pass through two groups (the first group and the second group) of photoelectric sensors during its downward travel. The microprocessor starts timing when calculating the time T23 for the ore car to pass through the second group and the third group of photoelectric sensors.

[0044] After the flag that the ore car reaches the first speed measurement point during its downward travel generates a displacement and the flag of the second speed measurement point also generates a displacement, when the third group of photoelectric sensors generate signal displacements, it is regarded that the ore car reaches the third speed measurement point during its downward travel, and the microprocessor calculates the time T23 between the second group and the third group for the ore car to pass through.

[0045] When the head of the ore car reaches the third speed measurement point during its downward travel, calculate the time for the ore car to pass through the first and second speed measurement intervals and the time for the ore car to pass through the second and third speed measurement intervals. If both of these times are greater than zero and less than the time corresponding to the maximum allowable speed, that is, T12>0, T23>0, T12<T12min, T23<T23min, then it is determined that the ore car is speeding.

[0046] When the ore car breaks its rope, it is the first ore car that speeds first. Therefore, only the speed of the first downward ore car needs to be detected.

[0047] Another installation method of the sensor: The sensor is between the top of the roadway and the ground track.

[0048] In order to ensure reliable and timely detection of the speeding phenomenon of the ore car, the present invention designs the following scheme: First, the photoelectric sensor is connected to the control center with a normally closed contact. In this way, when there is no ore car or pedestrian passing through, the control center can continuously receive the signal of the sensor, indicating that the photoelectric sensor is working normally. Once the control center cannot receive the response signal of this photoelectric sensor when there is no ore car or pedestrian passing through, the control center will consider that this sensor is likely to have failed, and the system will give an alarm prompt; on the other hand, on the display screen in the control center control room, a status display screen of the sensor is designed. When the photoelectric sensor is not blocked, a green signal lamp is lit. When this photoelectric sensor is blocked, the signal lamp shows red. When it is blocked for a continuous period of time, the control center issues an alarm signal to prompt the operator to check.

[0049] The specific advantages and positive effects of the technical solution provided by the embodiment of the present invention are reflected in the following aspects:

[0050] 1) High reliability: By using normally closed contacts connected to the control center, the control center can ensure that the sensor signal is continuously received when there are no mine cars or pedestrians passing, thus ensuring the normal operation of the photoelectric sensor. At the same time, if a sensor malfunctions, the system will issue an alarm prompting the operator's attention in time to avoid accidents caused by the malfunction.

[0051] 2) Timely performance: The sensor status display screen can intuitively reflect the working status of the sensor. When the photoelectric sensor is blocked, the control center will immediately issue an alarm signal and prompt the operator to check to ensure that possible problems can be discovered in time.

[0052] 3) Simple operation: This solution adopts a design that displays the sensor status in real time. The operator can directly observe the color of the signal light on the display to determine whether the sensor is working properly, avoiding operator errors due to complex operations, thereby improving safety.

[0053] This solution improves the reliability and timeliness of the system by using normally closed contacts to access the control center and designing a sensor status display screen. It is also simple to operate and can effectively detect speeding mine cars to ensure the safety of mine production.

[0054] like Figure 2 As shown, the system for detecting overspeed of inclined mine vehicles using a photoelectric sensor provided by an embodiment of the present invention includes:

[0055] The time detection module is used to detect the time when the inclined mine car passes by using a state detection component composed of three groups of photoelectric sensors connected to the microprocessor, and feed back the detection signal to the microprocessor;

[0056] The signal analysis module is used to perform comprehensive calculation and analysis on the detection signal using a microprocessor. When it is determined that the running speed of the inclined shaft mine car exceeds the set speed, the control center sends out a corresponding alarm signal.

[0057] When the length of the mine car is 3000mm, the distance between the first and second groups of photoelectric switches is 1000mm, and the distance between the second and third groups of photoelectric sensors is 1000mm, the maximum speed of the mine car is set to 3000mm / S.

[0058] The minimum time for a mine car to pass through two sets of photoelectric sensors is: T12min=1000 / 3000=0.333S; T23min=1000 / 3000=0.333S;

[0059] Calculations show that the shortest time for a mine car to pass through each set of photoelectric sensors during normal operation is 333ms.

[0060] like Figure 3 、 Figure 4As shown, when the first speed measurement point optoelectronic sensor 1 changes its position, while the signals of the second speed measurement point sensor 2 and the third speed measurement point optoelectronic sensor 3 do not change their positions, the microprocessor determines that the ore car is moving downward. When the downward ore car reaches the first speed measurement point, the flag 1A indicating that the ore car has reached the first speed measurement point is set to 1, and the microprocessor interval timer T12 starts timing.

[0061] When the flag 1A indicating that the ore car has reached the first speed measurement point is equal to 1, and when the second speed measurement point optoelectronic sensor 2 changes its position, the flag 1B indicating that it has reached the second speed measurement point is set to 1. The microprocessor calculates the time T12 for the ore car to pass through the first and second speed measurement intervals, and the interval timer T23 for the second and third speed measurement intervals starts timing.

[0062] When the ore car moves downward and the flag 1A indicating that it has passed through the first speed measurement point is equal to 1, and when the flag 1B indicating that the ore car has reached the second speed measurement point is equal to 1, and when the third speed measurement point optoelectronic sensor 3 changes its position, it indicates that the ore car has reached the third speed measurement point. The microprocessor calculates the time T^23 for the ore car to pass between the second group and the third group.

[0063] When the third speed measurement point optoelectronic sensor 3 is blocked and 1C changes its position, at this time, the flag 1C is set to 1, and it is regarded that the ore car has reached the third speed measurement point.

[0064] If the above two times T12 > 0, T23 > 0, T12 < T12min, and T23 < T23min, it is determined that the ore car is speeding, and M1 is set to 1; otherwise, M1 = 0, indicating that the ore car is not speeding.

[0065] When the first ore car passes through the third speed measurement point, the shielding flag Me = 1. After a certain period of time, Me = 0. During the period when Me = 1, all status flags are shielded, that is, the speed of non - the first ore car is not detected.

[0066] It should be noted that the embodiments of the present invention can be implemented through hardware, software, or a combination of software and hardware. The hardware part can be implemented using dedicated logic; the software part can be stored in a memory and executed by an appropriate instruction execution system, such as a microprocessor or dedicated designed hardware. Those of ordinary skill in the art can understand that the above - mentioned devices and methods can be implemented using computer - executable instructions and / or included in processor control code. For example, such code is provided on a carrier medium such as a disk, CD, or DVD - ROM, a programmable memory such as a read - only memory (firmware), or a data carrier such as an optical or electronic signal carrier. The devices and their modules of the present invention can be implemented by hardware circuits of programmable hardware devices such as very large - scale integrated circuits or gate arrays, semiconductors such as logic chips and transistors, or programmable logic devices such as field - programmable gate arrays, and can also be implemented by software executed by various types of processors, or can be implemented by a combination of the above - mentioned hardware circuits and software, such as firmware.

[0067] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with this technical field within the technical scope disclosed by the present invention and within the spirit and principles of the present invention should be covered by the scope of protection of the present invention.

Claims

1. A method for detecting overspeed of inclined mine vehicles using a photoelectric sensor, characterized in that: include: The system uses a status detection component consisting of three groups of photoelectric sensors to detect when the inclined mine car passes through and feeds back the detection signal to the microprocessor, where the status detection component is connected to the microprocessor. The microprocessor performs comprehensive calculations and analysis on the detection signal. When it determines that the inclined mine car's running speed exceeds the set speed, the control center sends a corresponding alarm signal. The method for detecting overspeeding of inclined mine cars using a photoelectric sensor also includes: the photoelectric sensor is connected to a control center using a normally closed contact, and when no mine car or pedestrian passes, the control center continuously receives the sensor signal to determine that the photoelectric sensor is operating normally; when a mine car or pedestrian passes, the photoelectric sensor is blocked, so that the photoelectric sensor receiving end cannot receive the infrared signal emitted by the photoelectric sensor, and the control center cannot receive the response signal of the photoelectric sensor; when the control center does not receive the response signal of the photoelectric sensor for a period of time, it is determined that the sensor has failed, and the system issues an alarm prompting an operator to check; a sensor status display screen is designed on a display in the control room of the control center, and the photoelectric sensor lights up a green signal light when it is not blocked, and the signal light turns red when the photoelectric sensor is blocked; The method for detecting overspeed of inclined mine vehicles using a photoelectric sensor comprises the following steps: Step 1: Arrange three sets of photoelectric sensors at a certain distance above the vehicle barrier along the roadway; calculate the time (T12min) for the mine car to pass through the first and second sets of photoelectric sensors, and the time (T23min) for the second and third sets of sensors, based on the maximum allowable speed of the mine car; Step 2: Under the premise that the photoelectric sensors at the second speed measuring point and the third speed measuring point do not receive a position change signal, when the first group of photoelectric sensors generates a position change signal, it is considered that the mine car has reached the first speed measuring point. The microprocessor sets a flag that the mine car has reached the first speed measuring point, and the microprocessor starts timing. Step 3: After the mine car passes through the first speed measuring point and the third group of photoelectric sensors does not change position, when the second group of photoelectric sensors generates a change signal, it is considered that the mine car has reached the second speed measuring point. A flag for the mine car to reach the second speed measuring point is set, and the microprocessor calculates the time T12 when the mine car passes through the first and second groups of photoelectric sensors. Step 4: When the mine car reaches the first speed measuring point and the second speed measuring point mark changes, the mine car is deemed to have reached the third speed measuring point when the third group of photoelectric sensors changes signal. The microprocessor calculates the time T23 between the mine car passing the second and third groups. Step 5: When the head of the mine car descends and reaches the third speed measuring point, the time it takes for the mine car to pass through the first and second speed measuring intervals and the time it takes for the second and third speed measuring intervals to pass is calculated. If the time of the first and second speed measuring intervals and the time of the second and third speed measuring intervals are both greater than zero and less than the time corresponding to the maximum allowable speed, the mine car is determined to be speeding.

2. The method for detecting overspeed of an inclined mine car using a photoelectric sensor as claimed in claim 1, wherein: The installation method of the three groups of photoelectric sensors in step one also includes: installing the three groups of photoelectric sensors between the top of the tunnel and the ground track.

3. The method for detecting overspeed of an inclined mine car using a photoelectric sensor as claimed in claim 1, wherein: The time of the first and second speed measurement intervals and the time of the second and third speed measurement intervals in step 5 are both greater than zero and less than the time corresponding to the maximum allowed speed, including: T12>0, T23>0, T12 <T12min、T23<T23min。 4. The method for detecting overspeed of an inclined mine car using a photoelectric sensor as claimed in claim 1, wherein: The method of using photoelectric sensors to detect overspeeding of inclined mine cars also includes: when the mine car rope breaks, the first mine car exceeds the speed first, so only the speed of the first descending mine car is detected.

5. A system for detecting overspeed of an inclined mine car using a photoelectric sensor using the method for detecting overspeed of an inclined mine car using a photoelectric sensor as claimed in any one of claims 1 to 4, characterized in that: The system for detecting overspeed of inclined mine cars using photoelectric sensors includes: The time detection module is used to detect the time when the inclined mine car passes by using a state detection component composed of three groups of photoelectric sensors connected to the microprocessor, and feed back the detection signal to the microprocessor; The signal analysis module is used to perform comprehensive calculation and analysis on the detection signal using a microprocessor. When it is determined that the running speed of the inclined shaft mine car exceeds the set speed, a corresponding alarm signal is sent out.

6. A computer device, characterized in that: The computer device includes a memory and a processor. The memory stores a computer program. When the computer program is executed by the processor, the processor executes the steps of the method for detecting overspeed of an inclined mine car using a photoelectric sensor as described in any one of claims 1 to 4.

7. A computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the processor executes the steps of the method for detecting overspeed of an inclined mine car using a photoelectric sensor as described in any one of claims 1 to 4.

8. An information data processing terminal, characterized in that: The information data processing terminal is used to implement the system for detecting overspeed of inclined mine vehicles using photoelectric sensors as described in claim 5.

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