Gas cylinder fixation distance control method and system

Abstract

The invention discloses a gas cylinder fixation distance control method and system. The gas cylinder fixation distance control method and system are used for controlling a first gas cylinder cart loaded with a first gas cylinder and a second gas cylinder cart loaded with a second gas cylinder. When the first gas cylinder cart and / or the second gas cylinder cart move, the real-time distance between the first gas cylinder and the second gas cylinder is obtained according to the positioning information of the RFID tag on the first gas cylinder cart and the positioning information of the RFID tag on the second gas cylinder cart; and whether the difference value of the real-time distance exceeding the preset safety distance falls into a preset difference value range or not is judged, if yes, a movement limiting instruction is sent to the first gas cylinder cart and / or the second gas cylinder cart, and the first gas cylinder cart and / or the second gas cylinder cart are / is controlled to send out an alarm signal. According to the gas cylinder cart, the positions of the gas cylinders are positioned through the RFID tags on the gas cylinder cart, the RFID tags are combined with the movement limiting device and the early warning device, accurate recognition and trend prediction of the distance between the gas cylinders are achieved, and it is ensured that the distance between the gas cylinders is not smaller than the safe distance.

Description

Technical Field

[0001] The present invention relates to the technical field of gas cylinder safety, and particularly relates to a method and system for controlling the fixed-position distance of gas cylinders. Background Art

[0002] In some indoor scenarios, such as inside a hydropower station factory, when welding and other operations are carried out, gas cylinders such as oxygen cylinders and acetylene cylinders need to be arranged at the operation site. Due to the requirements of safety production regulations, during the operation process, the distance between the oxygen cylinder and the acetylene cylinder should be maintained above a specified distance. Currently, for the induction ranging of welding gas cylinders, the infrared ranging method is adopted. For example, in the patent with the application number CN201710673577.2 and the name of the welding gas cylinder induction ranging system, ranging is achieved by two trolleys provided with multiple gas cylinder placement slots. When in use, the oxygen cylinder and the acetylene cylinder are respectively placed on the two trolleys, and the distance between them can be measured through an infrared ranging sensor. When the distance is less than the specified distance, the sound and light alarm system alarms for prompt.

[0003] However, in actual application, infrared ranging is affected by occlusion; when there is a certain occlusion between gas cylinders, the infrared ranging method cannot effectively measure the distance between gas cylinders. When there are more than two gas cylinders in the operation site, infrared ranging will interfere with each other and the relative distance between each gas cylinder cannot be measured. The high temperature, strong infrared radiation, and the generated metal smoke and splashes during the welding process may affect the signal received by the infrared ranging sensor.

[0004] Moreover, infrared ranging can only perform a single distance judgment and cannot globally monitor the position status information of each gas cylinder during the operation process; by the time the infrared ranging gives a warning, the distance between the oxygen cylinder and the acetylene cylinder has already been in a dangerous range, and the operator can only quickly separate the two again, that is, the danger of the too-close distance between the oxygen cylinder and the acetylene cylinder can only be detected and eliminated after it occurs, and it is difficult to avoid the occurrence of danger throughout the operation process. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: to provide a method and system for controlling the fixed-position distance of gas cylinders, realizing accurate identification and trend prediction of the distance between gas cylinders, and ensuring that the distance between gas cylinders will not be lower than the safety distance.

[0006] To solve the above technical problem, the technical solution adopted by the present invention is: A method for controlling the fixed-position distance of gas cylinders, used to control a first gas cylinder trolley loaded with a first gas cylinder and a second gas cylinder trolley loaded with a second gas cylinder, includes the following steps: S1. When the first gas cylinder trolley and / or the second gas cylinder trolley move, obtain the real-time distance between the first gas cylinder and the second gas cylinder according to the positioning information of the RFID tags on the first gas cylinder trolley and the second gas cylinder trolley; S2. Determine whether the difference between the real-time distance exceeding the preset safety distance falls within the preset difference range. If so, send a movement restriction instruction to the first gas cylinder trolley and / or the second gas cylinder trolley, and control the first gas cylinder trolley and / or the second gas cylinder trolley to emit an alarm signal. To solve the above technical problems, another technical solution adopted by the present invention is: A gas cylinder fixed-position distance control system includes a main controller, a reader-writer, and a control auxiliary mechanism. The control auxiliary mechanism is provided on both the first gas cylinder trolley and the second gas cylinder trolley; The control auxiliary mechanism includes an RFID positioning tag, a movement restriction device, and a warning device; The main controller is respectively communicatively connected to all the RFID positioning tags through the reader-writer; The main controller is electrically connected to all the movement restriction devices and the warning devices respectively, and the main controller is used to execute the above-mentioned gas cylinder fixed-position distance control method.

[0007] The beneficial effects of the present invention are as follows: Provide a gas cylinder fixed-position distance control method and system. By using RFID tags on the gas cylinder trolleys to locate the positions of the gas cylinders, it can not only quickly reflect the distance information between the gas cylinders, but also has strong signal anti-interference ability and good stability. Combining it with the movement restriction device and the warning device, when the difference between the real-time distance between the first gas cylinder and the second gas cylinder and the preset safety distance enters the preset difference range, it indicates that the distance between the two gas cylinders is gradually shrinking and is about to enter the dangerous distance. Immediately send a movement restriction instruction to the gas cylinder trolley to prevent the real-time distance between the first gas cylinder and the second gas cylinder from continuing to shrink. At the same time, an alarm signal is sent on the gas cylinder trolley to realize the accurate identification and trend prediction of the distance between the gas cylinders, ensuring that the distance between the gas cylinders will not be lower than the safety distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a step schematic diagram of a gas cylinder fixed-position distance control method of the present invention; Figure 2 It is a system block diagram of a gas cylinder fixed-position distance control system of the present invention; Figure 3 It is a front view of the gas cylinder trolley of the present invention; Figure 4 It is a top view of the gas cylinder trolley of the present invention; Figure 5Side view of the gas cylinder trolley of the present invention.

[0009] Label description: 1. Main controller; 2. Reader-writer; 3. RFID positioning tag; 4. Movement restriction device; 5. Warning light assembly; 6. Sound alarm assembly; 7. Rotation detection sensor; 8. Roller; 9. Profiled fixing groove; 10. Upper fixing ring; 11. Lower fixing ring; 12. Push rod; 13. Gas cylinder positioning induction part. Detailed implementation manners

[0010] To describe in detail the technical content, achieved objectives and effects of the present invention, the following is described in conjunction with the implementation manners and accompanied by the drawings.

[0011] Please refer to Figure 1 , a method for controlling the fixed distance of gas cylinders, which is used to control the first gas cylinder trolley loaded with the first gas cylinder and the second gas cylinder trolley loaded with the second gas cylinder, and includes the following steps: S1. When the first gas cylinder trolley and / or the second gas cylinder trolley moves, according to the positioning information of the RFID tags on the first gas cylinder trolley and the RFID tags on the second gas cylinder trolley, obtain the real-time distance between the first gas cylinder and the second gas cylinder; S2. Judge whether the difference between the real-time distance exceeding the preset safety distance falls within the preset difference range. If so, send a movement restriction instruction to the first gas cylinder trolley and / or the second gas cylinder trolley, and control the first gas cylinder trolley and / or the second gas cylinder trolley to emit an alarm signal. As can be seen from the above description, the beneficial effects of the present invention are as follows: Using RFID tags to locate the positions of gas cylinders on the gas cylinder trolley can not only quickly reflect the distance information between gas cylinders, but also has strong signal anti-interference ability and good stability. Combining it with the movement restriction device 4 and the early warning device, when the difference between the real-time distance between the first gas cylinder and the second gas cylinder and the preset safety distance enters the preset difference range, it means that the distance between the two gas cylinders is gradually shrinking and is about to enter the dangerous distance. Immediately send a movement restriction instruction to the gas cylinder trolley to prevent the real-time distance between the first gas cylinder and the second gas cylinder from continuing to shrink, and at the same time emit an alarm signal on the gas cylinder trolley to realize the accurate identification and trend prediction of the distance between gas cylinders, and ensure that the distance between gas cylinders will not be lower than the safety distance.

[0012] Further, before the step S1, it further includes: S0. Judge whether the first gas cylinder and the second gas cylinder are respectively loaded on the first gas cylinder trolley and the second gas cylinder trolley. If so, execute step S1, otherwise re-judge.

[0013] As can be seen from the above description, before performing the moving distance control detection and control, it is necessary to first detect whether the gas cylinder trolley is loaded with gas cylinders, so as to avoid the positioning tag continuously emitting signals when there is no gas cylinder loaded, resulting in too fast attenuation of the battery power; at the same time, the amount of data and the complexity of data processing can be reduced, and the efficiency of distance calculation and distance warning calculation can be improved.

[0014] Further, before the step S2, it also includes: Set at least two non-overlapping preset difference ranges, and the moving restriction instruction includes at least two control signals for adjusting the rotational resistance of the rollers 8 of the first gas cylinder trolley and / or the second gas cylinder trolley, and the control signals correspond one-to-one to the preset difference ranges; The sending of the moving restriction instruction to the first gas cylinder trolley and / or the second gas cylinder trolley specifically is: Send a control signal corresponding to the preset difference range to the first gas cylinder trolley and / or the second gas cylinder trolley.

[0015] As can be seen from the above description, setting at least two non-overlapping preset difference ranges is used to indicate that the distance between two gas cylinders approaches the preset safety distance to different extents, and then corresponding control signals are set to adjust the rotational resistance of the rollers 8 of the first gas cylinder trolley and / or the second gas cylinder trolley, so that the operator can gradually feel the change in resistance when pushing the gas cylinder trolley, and can timely detect whether the current movement will cause the two gas cylinders to gradually approach, and feed back the trend of distance change to the movement control of the gas cylinder trolley, ensuring that the operator will not make the distance between the two gas cylinders lower than the preset safety distance during the operation.

[0016] Further, the alarm signal includes at least two different forms of sound and light signals, and the sound and light signals correspond one-to-one to the preset difference ranges; The controlling of the first gas cylinder trolley and / or the second gas cylinder trolley to emit an alarm signal specifically is: Control the first gas cylinder trolley and / or the second gas cylinder trolley to emit sound and light signals corresponding to the preset difference range.

[0017] As can be seen from the above description, in addition to using different control signals for feedback, different changes are also given in the sound and light signals to enhance the warning effect.

[0018] Further, after the "if" in the step S0, it also includes: According to the weight information of the first gas cylinder and the second gas cylinder, judge whether the first gas cylinder and / or the second gas cylinder is unloaded. If so, re-execute the step S0; otherwise, execute the step S1.

[0019] As can be seen from the above description, not only is it necessary to detect whether the gas cylinder trolley is loaded with gas cylinders, but also to determine whether the gas cylinder is empty by the weight information of the gas cylinder, which can reduce the amount of data and the complexity of data processing, and improve the efficiency of distance calculation and distance warning calculation.

[0020] Please refer to Figures 2 to 5 , a gas cylinder fixed-position distance control system, including a main controller 1, a reader-writer 2, and a control auxiliary mechanism. The control auxiliary mechanism is provided on both the first gas cylinder trolley and the second gas cylinder trolley; The control auxiliary mechanism includes an RFID positioning tag 3, a movement restriction device 4, and a warning device; The main controller 1 is respectively communicatively connected to all the RFID positioning tags 3 through the reader-writer 2; The main controller 1 is respectively electrically connected to all the movement restriction devices 4 and the warning devices. The main controller 1 is used to execute the above-mentioned gas cylinder fixed-position distance control method.

[0021] As can be seen from the above description, the beneficial effect of the present invention is that by using RFID tags on the gas cylinder trolley to locate the position of the gas cylinder, not only can the distance information between the gas cylinders be quickly reflected, but also the signal has strong anti-interference ability and good stability. Combining it with the movement restriction device 4 and the warning device, when the difference between the real-time distance between the first gas cylinder and the second gas cylinder and the preset safety distance enters the preset difference range, it means that the distance between the two gas cylinders is gradually shrinking and is about to enter the dangerous distance. Immediately send a movement restriction instruction to the gas cylinder trolley to prevent the real-time distance between the first gas cylinder and the second gas cylinder from continuing to shrink, and at the same time send an alarm signal on the gas cylinder trolley to achieve accurate identification and trend prediction of the distance between the gas cylinders, ensuring that the distance between the gas cylinders will not be lower than the safety distance.

[0022] Further, the control auxiliary mechanism further includes a gas cylinder positioning sensor 13 and a gas cylinder weight sensor; The main controller 1 is respectively communicatively connected to all the gas cylinder positioning sensors 13 and the gas cylinder weight sensors through the reader-writer 2; The gas cylinder positioning sensor 13 and the gas cylinder weight sensor are arranged at the position for installing the gas cylinder on the first gas cylinder trolley or the second gas cylinder trolley.

[0023] As can be seen from the above description, before performing the moving distance control detection and control, first use the gas cylinder positioning sensor 13 and the gas cylinder weight sensor to detect whether the gas cylinder trolley is loaded with gas cylinders and whether the gas cylinder is empty, so as to avoid the positioning tag continuously emitting signals when there is no gas cylinder loaded, resulting in too fast attenuation of the battery power; at the same time, it can reduce the amount of data and the complexity of data processing, and improve the efficiency of distance calculation and distance warning calculation.

[0024] Further, the control assistance mechanism further includes a rotation detection sensor 7; The rotation detection sensors 7 of the two control assistance mechanisms are respectively arranged on the rollers 8 of the first gas cylinder trolley and the second gas cylinder trolley.

[0025] As can be seen from the above description, the rotation detection sensor 7 is used to detect whether the gas cylinder trolley is in a moving state, so as to facilitate judging whether it is necessary to obtain positioning information and re-detect the real-time distance between the gas cylinders, and avoid the positioning tag from continuously emitting signals when no gas cylinder is loaded, resulting in too fast attenuation of the battery power; meanwhile, the amount of data and the complexity of data processing can be reduced, and the efficiency of distance calculation and distance warning calculation can be improved.

[0026] Further, the movement restriction device 4 is a rotation resistance regulator; The rotation resistance regulator is used to adjust the rotation resistance of the rollers 8 of the first gas cylinder trolley or the second gas cylinder trolley.

[0027] As can be seen from the above description, corresponding control signals are set to adjust the rotation resistance of the rollers 8 of the first gas cylinder trolley and / or the second gas cylinder trolley, so that the operator can gradually feel the change in resistance when pushing the gas cylinder trolley, and timely detect whether the current movement will cause the two gas cylinders to gradually approach, and feedback the trend prediction of the distance change to the movement control of the gas cylinder trolley, ensuring that the operator will not make the distance between the two gas cylinders lower than the preset safety distance during the operation process.

[0028] Further, the warning device includes a warning light assembly 5 and a sound alarm assembly 6; The main controller 1 is electrically connected to all the warning light assemblies 5 and the sound alarm assemblies 6 respectively.

[0029] As can be seen from the above description, in the warning function part, the warning is carried out in a combination of sound and light, the warning effect is eye-catching, and it can be flexibly changed according to the actual application requirements, and the practicability is strong.

[0030] Please refer to Figure 1 , the first embodiment of the present invention is: A gas cylinder fixed-distance control method for controlling a first gas cylinder trolley loaded with a first gas cylinder and a second gas cylinder trolley loaded with a second gas cylinder, comprising the following steps: S0. Judge whether the first gas cylinder and the second gas cylinder are respectively loaded on the first gas cylinder trolley and the second gas cylinder trolley. If so, judge whether the first gas cylinder and / or the second gas cylinder is unloaded according to the weight information of the first gas cylinder and the second gas cylinder. If the first gas cylinder and the second gas cylinder are unloaded, re-execute step S0, otherwise execute step S1.

[0031] In this embodiment, technical means such as image recognition and occlusion detection can be specifically used to detect whether a gas cylinder is loaded on the gas cylinder trolley, and the weight of the gas cylinder can be detected by means such as pressure detection. The detection result is compared with the weight of the gas cylinder in the non-empty state to determine whether the gas cylinder is empty.

[0032] S1. When the first gas cylinder trolley and / or the second gas cylinder trolley moves, according to the positioning information of the RFID tags on the first gas cylinder trolley and the second gas cylinder trolley, obtain the real-time distance between the first gas cylinder and the second gas cylinder; In this embodiment, it can be determined whether the gas cylinder is moving by detecting whether the rollers 8 of the gas cylinder trolley rotate. If neither the first gas cylinder trolley nor the second gas cylinder trolley moves, it means that the real-time distance between the two gas cylinders has not changed, so there is no need to obtain the positioning information of the RFID tag; when any one of the first gas cylinder trolley and the second gas cylinder trolley moves, it is necessary to re-obtain the positioning information and judge the distance change.

[0033] In practical applications, the tag parts all adopt active RFID (Radio Frequency Identification) tags for sending and transmitting positioning information; the first gas cylinder and the second gas cylinder can respectively refer to an oxygen cylinder and an acetylene cylinder, and the number of the first gas cylinder and the second gas cylinder can be more than two; according to the different gases loaded, determine the two gas cylinders that need to be subjected to distance detection.

[0034] S2. Judge whether the difference value of the real-time distance exceeding the preset safety distance falls within the preset difference range. If so, send a movement restriction instruction to the first gas cylinder trolley and / or the second gas cylinder trolley, and control the first gas cylinder trolley and / or the second gas cylinder trolley to send an alarm signal. In this embodiment, before step S2, it further includes: Set at least two non-overlapping preset difference ranges. The movement restriction instruction includes at least two control signals for adjusting the rotational resistance of the rollers 8 of the first gas cylinder trolley and / or the second gas cylinder trolley, and the control signals correspond to the preset difference ranges one by one; sending a movement restriction instruction to the first gas cylinder trolley and / or the second gas cylinder trolley specifically means: sending a control signal corresponding to the preset difference range to the first gas cylinder trolley and / or the second gas cylinder trolley.

[0035] Specifically, one preset difference range can be set to be less than or equal to 10% of the preset safety distance, and the other can be set to be greater than 10% of the preset safety distance and less than or equal to 20% of the preset safety distance, etc. The smaller the preset difference range into which the difference between the real-time distance and the preset safety distance falls, or in other words, the smaller the difference between the real-time distance and the preset safety distance, the greater the rotational resistance of the rollers 8 of the first gas cylinder trolley and / or the second gas cylinder trolley, thereby preventing the operator from moving the gas cylinder trolley further.

[0036] In this embodiment, the alarm signal includes at least two different forms of sound and light signals, and the sound and light signals correspond one-to-one with the preset difference range; controlling the first gas cylinder trolley and / or the second gas cylinder trolley to emit an alarm signal specifically means: controlling the first gas cylinder trolley and / or the second gas cylinder trolley to emit the sound and light signals corresponding to the preset difference range. Combining the above two preset difference ranges, the sound and light signals corresponding to one preset difference range can be to emit a buzzer sound and keep a red light on for warning, and the sound and light signals corresponding to the other preset difference range can be to emit a buzzer sound and flash a red light for warning.

[0037] Please refer to Figures 2 to 5 , Embodiment 2 of the present invention is as follows: A gas cylinder fixed-position distance control system includes a main controller 1, a reader-writer 2, and a control auxiliary mechanism. The control auxiliary mechanism is provided on both the first gas cylinder trolley and the second gas cylinder trolley; the control auxiliary mechanism includes an RFID positioning tag 3, a movement restriction device 4, and a warning device; the main controller 1 is respectively communicatively connected to all the RFID positioning tags 3 through the reader-writer 2; the main controller 1 is respectively electrically connected to all the movement restriction devices 4 and the warning devices, and the main controller 1 is used to execute a gas cylinder fixed-position distance control method according to Embodiment 1.

[0038] In this embodiment, the control auxiliary mechanism further includes a gas cylinder positioning sensor 13 and a gas cylinder weight sensor; the main controller 1 is respectively communicatively connected to all the gas cylinder positioning sensors 13 and the gas cylinder weight sensors through the reader-writer 2; The gas cylinder positioning sensor 13 and the gas cylinder weight sensor are arranged at the position for installing the gas cylinder on the first gas cylinder trolley or the second gas cylinder trolley.

[0039] As Figures 3 to 5As shown in the figure, the gas cylinder trolley includes a body, four rollers 8 and a push rod 12; the rollers 8 are universal wheels located at the bottom of the body and are made of permanent magnets, which are used to move the device in all directions; a gas cylinder fixing device is provided at the position on the gas cylinder trolley for loading the gas cylinder. The gas cylinder fixing device includes a profiling fixing groove 9, an upper fixing ring 10, a lower fixing ring 11 and a bottom fixing plate. The upper fixing ring 10 and the lower fixing ring 11 are used to limit the radial movement of the gas cylinder, and the bottom fixing plate is used to limit the axial downward movement of the gas cylinder. The gas cylinder weight sensing part can specifically adopt a pressure sensor and is arranged on the bottom fixing plate; and the gas cylinder positioning sensing part 13 can adopt an infrared sensor; the pressure value of the pressure sensor is set to the pressure corresponding to the weight of the empty gas cylinder. When the gas cylinder trolley is equipped with a gas cylinder, it blocks the infrared sensor and emits a blocking signal, indicating that a gas cylinder has been installed on the trolley; after receiving the signal from the infrared sensor, the pressure sensor detects the pressure it bears. When the weight of the gas cylinder exceeds the weight of the empty gas cylinder, the pressure sensor emits a loading signal. When both the blocking signal and the loading signal are emitted, the fixing detection sensor emits a fixing signal, indicating that the gas cylinder has been fixed on the gas cylinder trolley and the gas cylinder is in a non-empty state.

[0040] In this embodiment, the control auxiliary mechanism further includes a rotation detection sensor 7; the rotation detection sensors 7 of the two control auxiliary mechanisms are respectively arranged on the rollers 8 of the first gas cylinder trolley and the second gas cylinder trolley. The rotation detection sensor 7 can be composed of an infrared emission device and an infrared reception device; specifically, a small hole is provided at a position deviating from the axis of the roller 8 of the gas cylinder trolley. The rotation detection sensor 7 is placed on both sides of the small hole, with an infrared emission device on one side and an infrared reception device on the other side. When the universal wheel rotates, the infrared reception device can count, and it is judged whether the roller 8 is in a rotating state through counting.

[0041] Among them, the movement restriction device 4 is a rotation resistance regulator; the rotation resistance regulator is located at the roller 8, and controls the magnitude of the magnetic field generated by the electromagnet during operation by changing the magnitude of the current, thereby adjusting the rotation resistance of the roller 8.

[0042] In addition, a label base and a fixing buckle are provided at the top of the gas cylinder fixing device for detachably fixing the RFID positioning label 3 on the gas cylinder trolley.

[0043] In this embodiment, the warning device includes a warning light assembly 5 and a sound alarm assembly 6; the main controller 1 is electrically connected to all the warning light assemblies 5 and the sound alarm assemblies 6 respectively. The warning light assembly 5 can be composed of lights of different colors such as red and yellow, and adopts various light-emitting forms such as constant light and flashing during use, while the sound alarm assembly 6 can mainly adopt a buzzer and adopts various sound-emitting forms such as long and short beeps.

[0044] In summary, for the gas cylinder fixed-distance control method and system provided by the present invention, RFID tags are used on the gas cylinder trolley to locate the position of the gas cylinder. It can read at a long distance, which can expand the positioning distance and avoid the problem of lost positioning information when the gas cylinder moves a long distance. The positioning reading speed is fast. During the hydropower operation process, the gas cylinder moves relatively frequently. Using active RFID tags for positioning can quickly read the position information of the gas cylinder, thereby improving the timeliness and speed of distance calculation. It has strong environmental adaptability and can be applied to welding environments with high temperature and high particulate concentration. Radio frequency identification has strong anti-interference ability against high temperature and particulate matter, which can avoid the problem of lost gas cylinder positioning information during the welding operation. Moreover, the RFID tag signal carries numbered information, and the distance measurement of gas cylinders does not interfere with each other. Radio frequency identification can write the gas cylinder number information, which can avoid the problem of mutual interference between different gas cylinders in infrared distance measurement. By combining it with the movement restriction device and the warning device, when the difference between the real-time distance between the first gas cylinder and the second gas cylinder and the preset safety distance enters the preset difference range, it means that the distance between the two gas cylinders is gradually shrinking and is about to enter the dangerous distance. Immediately send a movement restriction instruction to the gas cylinder trolley to prevent the real-time distance between the first gas cylinder and the second gas cylinder from continuing to shrink. At the same time, an alarm signal is sent on the gas cylinder trolley to achieve accurate identification and trend prediction of the distance between gas cylinders, ensuring that the distance between gas cylinders will not be lower than the safety distance.

[0045] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent transformations made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in related technical fields, are equally included in the patent protection scope of the present invention.

Claims

1. A method for controlling the fixed distance of gas cylinders, used to control a first gas cylinder cart loaded with a first gas cylinder and a second gas cylinder cart loaded with a second gas cylinder, characterized in that: The steps include: S1. When the first gas cylinder cart and / or the second gas cylinder cart moves, the real-time distance between the first gas cylinder and the second gas cylinder is obtained according to the positioning information of the RFID tag on the first gas cylinder cart and the RFID tag on the second gas cylinder cart; S2. Determine whether the difference between the real-time distance and the preset safety distance falls within a preset difference range. If so, issue a movement restriction instruction to the first gas cylinder cart and / or the second gas cylinder cart, and control the first gas cylinder cart and / or the second gas cylinder cart to issue an alarm signal.

2. A method for controlling the fixed distance of a gas cylinder according to claim 1, characterized in that: Before step S1, the following steps are also included: S0. Determine whether the first gas cylinder cart and the second gas cylinder cart are loaded with the first gas cylinder and the second gas cylinder, respectively. If so, execute step S1; otherwise, re-determine.

3. A method for controlling the fixed distance of a gas cylinder according to claim 1, characterized in that: Before step S2, the following steps are also included: At least two non-overlapping preset difference ranges are set, the movement restriction instruction includes at least two control signals for adjusting the rotational resistance of the rollers of the first gas cylinder cart and / or the second gas cylinder cart, and the control signals correspond to the preset difference ranges one by one; The sending of the movement restriction instruction to the first gas cylinder cart and / or the second gas cylinder cart specifically includes: A control signal corresponding to the preset difference range is sent to the first gas cylinder cart and / or the second gas cylinder cart.

4. A method for controlling the fixed distance of a gas cylinder according to claim 3, characterized in that: The alarm signal includes at least two different forms of sound and light signals, and the sound and light signals correspond to the preset difference range one by one; The controlling the first gas cylinder trolley and / or the second gas cylinder trolley to send out an alarm signal specifically comprises: The first gas cylinder trolley and / or the second gas cylinder trolley are controlled to emit sound and light signals corresponding to the preset difference range.

5. A method for controlling the fixed distance of a gas cylinder according to claim 2, characterized in that: If the step S0 further includes: According to the weight information of the first gas cylinder and the second gas cylinder, determine whether the first gas cylinder and / or the second gas cylinder is empty. If so, re-execute the step S0; otherwise, execute the step S1.

6. A gas cylinder fixed distance control system, characterized in that: It includes a main controller, a reader / writer and a control auxiliary mechanism, and the control auxiliary mechanism is provided on the first gas cylinder trolley and the second gas cylinder trolley; The control auxiliary mechanism includes an RFID positioning tag, a movement restriction device and an early warning device; The main controller is connected to all the RFID positioning tags through the reader / writer; The main controller is electrically connected to all the movement restriction devices and the early warning devices respectively, and the main controller is used to execute a gas cylinder fixed distance control method as described in any one of claims 1 to 5.

7. A gas cylinder fixed distance control system according to claim 6, characterized in that: The control auxiliary mechanism also includes a gas cylinder positioning sensor and a gas cylinder weight sensor; The main controller is connected to communicate with all the gas cylinder positioning sensors and the gas cylinder weight sensors respectively through the reader / writer; The gas cylinder positioning sensor and the gas cylinder weight sensor are arranged at positions on the first gas cylinder trolley or the second gas cylinder trolley for installing gas cylinders.

8. A gas cylinder fixed distance control system according to claim 6, characterized in that: The control auxiliary mechanism also includes a rotation detection sensor; The rotation detection sensors of the two control auxiliary mechanisms are respectively arranged on the rollers of the first gas cylinder trolley and the second gas cylinder trolley.

9. A gas cylinder fixed distance control system according to claim 6, characterized in that: The movement limiting device is a rotation resistance adjuster; The rotation resistance adjuster is used to adjust the rotation resistance of the rollers of the first gas cylinder trolley or the second gas cylinder trolley.

10. A gas cylinder fixed distance control system according to claim 6, characterized in that: The early warning device includes a warning light component and a sound alarm component; The main controller is electrically connected to all the warning light components and the sound alarm components respectively.

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