CN117369361A - Wireless close stop control device - Google Patents
Wireless close stop control device Download PDFInfo
- Publication number
- CN117369361A CN117369361A CN202311528397.7A CN202311528397A CN117369361A CN 117369361 A CN117369361 A CN 117369361A CN 202311528397 A CN202311528397 A CN 202311528397A CN 117369361 A CN117369361 A CN 117369361A
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- wireless
- emergency stop
- signal receiver
- remote controller
- control device
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- 238000004891 communication Methods 0.000 claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 7
- 230000005856 abnormality Effects 0.000 claims description 6
- 239000004973 liquid crystal related substance Substances 0.000 claims description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 230000009194 climbing Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 208000032953 Device battery issue Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011990 functional testing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1103—Special, intelligent I-O processor, also plc can only access via processor
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Selective Calling Equipment (AREA)
Abstract
The invention provides a wireless close-stop control device, which comprises: the wireless remote controller is provided with a wireless antenna and a close-stop button for sending a close-stop signal; the signal receiver comprises an integrated circuit board, an antenna interface is arranged outside the signal receiver, and the signal receiver is in communication connection with the wireless remote controller; the PLC system is in communication connection with the integrated circuit board and is provided with a control program; the debugging equipment is digitally connected with a control program of the PLC system; and the power supply mechanism is electrically connected with the debugging equipment, the PLC system and the signal receiver. In the process of debugging the quay crane, the wireless receiver is arranged in a safety relay close-stop loop in the PLC system, and is remotely controlled by the wireless remote controller, so that when an emergency occurs, a worker can carry out emergency braking in the shortest time, and the potential safety hazard is reduced.
Description
Technical Field
The invention relates to the technical field of control equipment emergency stop during debugging, in particular to a wireless emergency stop control device.
Background
Safety is important in debugging and functional testing of the electrical and mechanical operating mechanisms of the port container shore bridge crane. Security is the primary criterion for everything that runs through the entire debugging and testing process. In large-scale installations such as quay cranes, there is a certain safety risk in the actual commissioning of the individual operating mechanisms. Although we ensure the security of each step as much as possible during the debugging process, we cannot completely avoid all possible security problems due to the complexity of the actual situation.
In existing emergency stop technology, emergency stop buttons of a crane are typically mounted near an operator station or at strategic locations such as a platform and aisle to enable rapid triggering in an emergency. However, during the debugging of the respective institutions, many areas are not provided with an emergency stop button due to the wide and complicated debugging areas. This may result in that when an emergency situation occurs, the commissioning personnel and the construction personnel may not be able to brake the apparatus by pressing the emergency stop button in a short time. Therefore, there is a need for a system that allows multiple operators to immediately initiate a tight stop operation in the event of an emergency, with emergency braking occurring in a minimum amount of time. The system can obviously reduce potential safety hazards and reduce casualties and property loss.
Disclosure of Invention
The invention provides a wireless emergency stop control device, which aims to enable debugging personnel and constructors to carry out emergency braking in the shortest time when emergency occurs, reduce potential safety hazards and reduce casualties and property loss.
To achieve the above object, the present invention provides a wireless emergency stop control device, comprising:
the wireless remote controller is provided with a wireless antenna and a close-stop button for sending a close-stop signal;
the signal receiver comprises an integrated circuit board, an antenna interface is arranged outside the signal receiver, and the signal receiver is in communication connection with the wireless remote controller;
the PLC system is in communication connection with the integrated circuit board and is provided with a control program;
the debugging equipment is digitally connected with a control program of the PLC system;
and the power supply mechanism is electrically connected with the debugging equipment, the PLC system and the signal receiver.
In one embodiment, the commissioning device is provided with a hard-stop hardware loop, the PLC system is provided with a PLC software loop, the signal receiver is provided with a dry contact, and the dry contact is connected in series with the hard-stop hardware loop and the PLC software loop.
In one embodiment, the signal receiver further comprises a normally open contact, a normally closed contact, an on-off button and a fault reset button, wherein the normally open contact and the normally closed contact are provided with an alarm feedback program.
In one embodiment, the integrated circuit board comprises a USB interface, a network cable interface and an RS232 serial port which are connected with the PLC system for communication and setting IP addresses.
In one embodiment, the wireless remote controller is provided with a detection abnormality alarm program, and the detection abnormality includes that the range of the wireless remote controller exceeds a set range threshold, the wireless remote controller is not matched with a signal receiver, a signal is lower than the signal threshold, and the electric quantity is lower than the electric quantity threshold.
In one embodiment, the wireless remote controller is provided with a plurality of wireless remote controllers, and the wireless remote controller comprises an LED liquid crystal display screen, a starting key, a shell with a magnet and an internal integrated circuit board.
In one embodiment, the LED liquid crystal display includes an electricity amount display portion and a signal display portion.
In one embodiment, the wireless remote control is provided with a lithium battery that can be detached for charging;
the power supply mechanism comprises an external wide voltage power supply, and the signal receiver is electrically connected with the external wide voltage power supply.
In one embodiment, the emergency stop button is IP66 waterproof rated, and the wireless remote control is provided with a dedicated emergency stop housing provided with a climbing harness mating portion.
In one embodiment, the signal coverage of the wireless remote control is a circular area with a radius of 200 m.
The invention has the following beneficial effects:
1. immediate response, reduced risk: the remote controller allows debugging personnel and guardians to take measures rapidly in case of emergency, and can respond immediately without going to a designated place, so that potential delay is reduced. And the emergency brake remote control can prevent equipment or machines from malfunctioning or uncontrolled operation, thereby reducing the likelihood of equipment and property damage.
2. Work efficiency is improved: remote control makes commissioning and monitoring more efficient because the operator does not need to walk around, multiple devices can be monitored and controlled at one location.
3. And the maintenance cost is reduced: the remote controller enables maintenance of the equipment to be more convenient, long-time shutdown or personnel intervention is not needed, and maintenance cost and downtime are reduced.
4. And (3) accurate control: the remote controller generally provides accurate control, allows debugging personnel to conduct fine adjustment and fine adjustment, and therefore operation accuracy is improved, one remote controller can be used for a plurality of devices or systems, the remote controller has a wide application range, and the number of controllers of different devices is reduced.
Drawings
FIG. 1 is a block diagram of a wireless emergency stop control device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a connection of a wireless emergency stop control device according to an embodiment of the present invention to a PLC system;
FIG. 3 is a schematic block diagram of a safety relay emergency stop loop according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a safety relay emergency stop loop according to an embodiment of the invention.
Wherein 1 is a signal receiver; 2 is a wireless remote controller; 3 is a PLC master control cabinet; and 4 is a PLC industrial personal computer.
Detailed Description
In order to make the purposes, technical solutions and advantages of the implementation of the present application more clear, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Fig. 1 is a schematic structural diagram of a wireless emergency stop control device according to an embodiment of the present invention, where the wireless emergency stop control device includes:
a wireless remote controller 2, wherein the wireless remote controller 2 is provided with a wireless antenna and a close-stop button for sending a close-stop signal;
the signal receiver 1, the signal receiver 1 includes the integrated circuit board, the outside of the said signal receiver 1 has aerial interfaces, connect with said wireless remote controller 2 communication, the said signal receiver 1 is put into PLC (programmable logic controller) system;
the PLC system is in communication connection with the integrated circuit board and is provided with a control program;
the debugging equipment is digitally connected with a control program of the PLC system;
and the power supply mechanism is electrically connected with the debugging equipment, the PLC system and the signal receiver 1.
Specifically, the PLC system includes PLC master control cabinet 3 and PLC industrial computer 4, after the tight button of wireless remote controller 2 is triggered, wireless remote controller 2 can send the tight signal that stops to signal receiver 1, can give the PLC system with signal transmission after signal receiver 1 receives the signal, can control debugging equipment to stop after the PLC system received the signal.
Still further, fig. 3 and 4 show a safety relay close-stop loop structure and a circuit, and the signal receiver 1 can be connected by connecting the normally open feedback contact of the signal receiver 1 in series with the safety relay close-stop loop in the PLC master control system.
In one embodiment, as shown in fig. 2, the commissioning device is provided with a hard-stop hardware loop, the PLC system is provided with a PLC software loop, and the signal receiver 1 is provided with a dry contact connected in series with the hard-stop hardware loop and the PLC software loop.
Specifically, the signal receiver 1 is provided with identifiers of K1, K2, K3, etc., and represents different relays or switch channels. These channels may be used to perform different control operations or to connect with external devices. K1 is connected with the emergency stop hardware loop, and when the PLC system receives an emergency stop signal transmitted by the external remote wireless remote controller 2, the main control loop is cut off to give an alarm, and emergency braking is immediately adopted.
In one embodiment, the signal receiver 1 further comprises a normally open contact, a normally closed contact, an on-off button and a fault reset button, wherein the normally open contact and the normally closed contact are provided with an alarm feedback program.
Specifically, the normally open contact and the normally closed contact are used for the control circuit, and when the signal receiver 1 is in a normal state, the normally open contact is in a closed state, and the normally closed contact can close the circuit in an emergency. The on-off button is typically used to turn on or off the signal receiver 1, and pressing the button turns on or off the power supply, putting the device into an operational or off state. When the device has a problem and has successfully resolved, pressing this button may attempt to resume normal operation.
In one embodiment, the integrated circuit board includes a USB (universal serial bus) interface, a network cable interface, and an RS232 (recommended standard 232) serial port that connect PLC system communications and set IP (internet protocol) addresses.
Specifically, the USB interface is used to connect the device to the PLC system, and may be used to program, configure, and monitor the PLC system, as well as to transmit data. The network cable interface is used for connecting the PLC system to the local area network, and allowing the PLC system to remotely communicate with other devices and systems, transmit data and remotely monitor. RS232 serial ports are used for short range local communications to enable data transmission, programming and monitoring PLCs, typically connected by serial communications cables.
In one embodiment, the wireless remote controller 2 is provided with a detection abnormality alarm program, and the detection abnormality includes that the range of the wireless remote controller 2 exceeds a set range threshold, is not matched with the signal receiver 1, the signal is lower than the signal threshold, and the electric quantity is lower than the electric quantity threshold.
Specifically, the setting of the range threshold value can be set according to the maximum communication distance between the wireless remote controller 2 and the signal receiver 1, and is specifically set according to specific situations; the setting of the signal threshold value can be set according to the condition of normal signal full grid; the setting of the electric quantity threshold value can be set at 20% of the full grid of the electric quantity, and can also be set according to specific needs. When the wireless remote controller 2 is detected to be in the above condition, the signal receiver 1 and the wireless remote controller 2 automatically trigger the abnormal detection alarm program to alarm.
In one embodiment, the wireless remote controller 2 is provided with a plurality of wireless remote controllers 2, and the wireless remote controller 2 comprises an LED (light emitting diode) liquid crystal display screen, a start button, a shell self-contained magnet and an internal integrated circuit board.
In one embodiment, the LED liquid crystal display includes an electricity amount display portion and a signal display portion.
Specifically, the electric quantity display component can accurately display the electric quantity of the battery, and is beneficial to timely charging operation of staff before the electric quantity is exhausted. Meanwhile, the signal display assembly can display the signal intensity in real time, and when the signal quality is poor, a worker can choose to wait for the signal intensity to reach a preset threshold value and then debug the equipment.
In one embodiment, the wireless remote control 2 is provided with a lithium battery that can be detached for charging;
the power supply mechanism includes an external wide voltage power source to which the signal receiver 1 is electrically connected.
In particular, the use of a lithium battery that can be removed for recharging can allow for direct replacement of the battery in the event of a battery failure, loss of power, etc., without the need for after-market repair. The external wide-voltage power supply is a power supply device which can accept power input of 24V/DC to 230V/AC, can normally work in a wider voltage range and can provide stable working voltage for the device. When the power supply is in a peak power consumption state or in a remote area, the external wide-voltage power supply can still keep normal operation, so that the reliability and the stability of the equipment are improved.
In one embodiment, the emergency stop button is IP66 waterproof grade, and the wireless remote control 2 is provided with a dedicated emergency stop housing provided with a climbing harness mating portion.
Specifically, the IP66 waterproof level emergency stop button can prevent water and other liquids from entering the interior of the button, can ensure stable operation under various climates and environmental conditions, and is not easy to fail or damage. The matched use of the tightly stopped shell and the ascending safety belt can provide more convenient working experience for staff. The shell can be fast installed and disassembled when the shell is tightly stopped, and meanwhile, the ascending safety belt can be conveniently worn and adjusted, so that workers can perform high-altitude operation more conveniently.
In one embodiment, the signal coverage of the wireless remote control 2 is a circular area with a radius of 200 m.
In particular, the wireless remote control 2 may transmit emergency signals at various locations of the connected device within the range.
In the system architecture according to an embodiment of the present invention, a power indicator is disposed on the signal receiver 1, and when the power is turned on, a red indicator is turned on, and when a power-on button is pressed, a power-on green indicator is turned on. When the on-key button is pressed for 5 seconds, the signal receiver 1 is turned off, and the indicator light is turned off. After the power-on, the 16 LED signal feedback indicator lamps of the signal receiver flash in red and green alternately, and then the signal receiver needs to be paired with the corresponding wireless remote controllers 2, wherein the numbers of the wireless remote controllers 2 are 01, 02, 03, 04, 05 and 06 respectively and correspond to the 6 indicator lamps of the signal receiver 1. When the wireless remote controller 2 presses the start key, the LED display screen is lightened, the electric quantity and signals are displayed on the screen, and when the wireless remote controller 2 is not in the range of 200 meters or the electric quantity is lower than 20%, the wireless remote controller 2 automatically buzzes and gives an alarm. After the wireless remote controller 2 is started, the wireless remote controller is provided with an indicator lamp, and when the wireless remote controller is not connected with the signal receiver 1, the indicator lamp can flash in red and green alternately. Pressing the close-stop button of the wireless remote controller 2 before matching, then continuously pressing the three start-up keys to realize automatic matching, and after matching is completed, the corresponding indicator lamps of the receiver and the close-stop remote controller are always on red, at this time, the corresponding indicator lamps of the close-stop button can be restored to be green, which represents that matching is successful. The built-in relay on the integrated circuit board of the signal receiver 1 is provided with a plurality of normally open contacts and normally closed contacts, and the signal from the electrified cable is connected to a safety relay close-stop loop in the main control system.
In actual work, after the wireless remote controller 2 and the signal receiver 1 are equipped, corresponding electric and mechanical debugging personnel can use a special tight-stopping shell sheath to hang on a safety belt for carrying with them outdoors, or can use a magnet with the self-carrying device to be placed in a nearby working area with a steel structure, so that the device is small and convenient to carry and is used for preventing false touch. The edge of the emergency stop button is also provided with a corresponding protection support, if an emergency condition occurs, the emergency stop button can be pressed down at the first time, a corresponding indicator light turns red, a buzzing prompt is accompanied, and the main control loop is immediately cut off to perform emergency braking. In this way, during the debugging and trial run of the crane, such as emergency situations, casualties, property loss and the like can be reduced. And after all functions of the crane are debugged and the test run is completed, the wireless tight stop control device can be dismantled.
The invention can be applied to port container shore bridges, is also suitable for the fields of debugging and functional test of other electrical mechanical equipment, has universal practical significance and practical value, and can effectively avoid the occurrence of safety emergency, reduce casualties, property loss and the like.
The invention has the following beneficial effects:
1. immediate response, reduced risk: the remote controller allows debugging personnel and guardians to take measures rapidly in case of emergency, and can respond immediately without going to a designated place, so that potential delay is reduced. And the emergency brake remote control can prevent equipment or machines from malfunctioning or uncontrolled operation, thereby reducing the likelihood of equipment and property damage.
2. Work efficiency is improved: remote control makes commissioning and monitoring more efficient because the operator does not need to walk around, multiple devices can be monitored and controlled at one location.
3. And the maintenance cost is reduced: the remote controller enables maintenance of the equipment to be more convenient, long-time shutdown or personnel intervention is not needed, and maintenance cost and downtime are reduced.
4. And (3) accurate control: the remote controller generally provides accurate control, allows debugging personnel to conduct fine adjustment and fine adjustment, and therefore operation accuracy is improved, one remote controller can be used for a plurality of devices or systems, the remote controller has a wide application range, and the number of controllers of different devices is reduced.
In the description of the present application, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. For ease of description, the dimensions of the various features shown in the drawings are not drawn to actual scale. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
It should be noted that, in this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. It should also be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
It should be further noted that, unless explicitly stated or limited otherwise, the term "coupled" as used in the description of the present application shall be understood in a broad sense, and may be either direct or through an intermediate medium or a relationship between two elements, as would be understood by one of ordinary skill in the art in light of the specific meaning of the present application.
The embodiments described above are intended to be implemented or used by those skilled in the art, and those skilled in the art may make various modifications or changes to the embodiments described above without departing from the spirit of the application, so that the scope of the application is not limited by the embodiments described above, but is to be accorded the broadest scope consistent with the innovative features recited in the claims.
Claims (10)
1. A wireless emergency stop control device, characterized in that the wireless emergency stop control device comprises:
the wireless remote controller is provided with a wireless antenna and a close-stop button for sending a close-stop signal;
the signal receiver comprises an integrated circuit board, an antenna interface is arranged outside the signal receiver, and the signal receiver is in communication connection with the wireless remote controller;
the PLC system is in communication connection with the integrated circuit board and is provided with a control program;
the debugging equipment is digitally connected with a control program of the PLC system;
and the power supply mechanism is electrically connected with the debugging equipment, the PLC system and the signal receiver.
2. The wireless emergency stop control device according to claim 1, wherein the commissioning device is provided with an emergency stop hardware circuit, the PLC system is provided with a PLC software circuit, the signal receiver is provided with a dry contact, and the dry contact is connected in series with the emergency stop hardware circuit and the PLC software circuit.
3. The wireless emergency stop control device according to claim 1, wherein the signal receiver further comprises a normally open contact, a normally closed contact, an on-off button, and a fault reset button, the normally open contact and the normally closed contact being provided with an alarm feedback program.
4. The wireless emergency stop control device according to claim 1, wherein the integrated circuit board comprises a USB interface, a network cable interface and an RS232 serial port, which are connected with the PLC system for communication and setting an IP address.
5. The wireless emergency stop control device according to claim 1, wherein the wireless remote controller is provided with a detection abnormality alarm program, and the detection abnormality includes that a range of the wireless remote controller exceeds a set range threshold, is not matched with a signal receiver, a signal is lower than the signal threshold, and an electric quantity is lower than the electric quantity threshold.
6. The wireless emergency stop control device according to claim 1, wherein a plurality of wireless remote controllers are provided, and each wireless remote controller comprises an LED liquid crystal display screen, a start button, a magnet arranged on a shell and an internal integrated circuit board.
7. The wireless emergency stop control device according to claim 6, wherein the LED liquid crystal display includes an electric quantity display portion and a signal display portion.
8. The wireless emergency stop control device according to claim 7, wherein the wireless remote controller is provided with a lithium battery that can be detached for charging;
the power supply mechanism comprises an external wide voltage power supply, and the signal receiver is electrically connected with the external wide voltage power supply.
9. The wireless emergency stop control device according to claim 1, wherein the emergency stop button is IP66 waterproof grade, the wireless remote controller is provided with a dedicated emergency stop housing provided with a climbing belt matching portion.
10. The wireless emergency stop control device according to claim 1, wherein the signal coverage of the wireless remote control is a circular area with a radius of 200 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311528397.7A CN117369361A (en) | 2023-11-16 | 2023-11-16 | Wireless close stop control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311528397.7A CN117369361A (en) | 2023-11-16 | 2023-11-16 | Wireless close stop control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117369361A true CN117369361A (en) | 2024-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311528397.7A Pending CN117369361A (en) | 2023-11-16 | 2023-11-16 | Wireless close stop control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117369361A (en) |
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2023
- 2023-11-16 CN CN202311528397.7A patent/CN117369361A/en active Pending
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