CN115257875A - Train station entering and exiting alarm device based on wireless transmission - Google Patents
Train station entering and exiting alarm device based on wireless transmission Download PDFInfo
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- CN115257875A CN115257875A CN202210946446.8A CN202210946446A CN115257875A CN 115257875 A CN115257875 A CN 115257875A CN 202210946446 A CN202210946446 A CN 202210946446A CN 115257875 A CN115257875 A CN 115257875A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 89
- 238000001514 detection method Methods 0.000 claims abstract description 46
- 238000002955 isolation Methods 0.000 claims abstract description 20
- 238000012544 monitoring process Methods 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 27
- 239000010959 steel Substances 0.000 claims description 27
- 238000004146 energy storage Methods 0.000 claims description 17
- 238000012545 processing Methods 0.000 claims description 14
- 239000002253 acid Substances 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 claims description 3
- 239000000084 colloidal system Substances 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 claims description 3
- 230000036581 peripheral resistance Effects 0.000 claims 1
- 238000004891 communication Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
- B61L23/06—Control, warning or like safety means along the route or between vehicles or trains for warning men working on the route
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/40—Arrangements in telecontrol or telemetry systems using a wireless architecture
- H04Q2209/43—Arrangements in telecontrol or telemetry systems using a wireless architecture using wireless personal area networks [WPAN], e.g. 802.15, 802.15.1, 802.15.4, Bluetooth or ZigBee
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- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention discloses a train in-and-out alarm device based on wireless transmission, which comprises a train in-and-out detection module and a signal acquisition and transmission module consisting of a first wireless transmission module; the second wireless transmission module, the photoelectric isolation module, the microcomputer system module, the 555 timer module, the relay module and the acousto-optic alarm module form a signal receiving alarm module; the train in-and-out detection module monitors train in and out of the station and transmits a detection signal through the first wireless transmission module; the second wireless transmission module receives the detection signal, the detection signal is safely isolated by the photoelectric isolation module and then uploaded to the microcomputer system module, and when the fact that the train needs to be alarmed when entering and leaving the station is detected, the microprocessor is connected with the relay module through the 555 timer module to control the acousto-optic alarm module to work. The invention adopts the detection module to monitor whether the train enters or leaves the station, transmits the train to the microcomputer system for real-time monitoring in a wireless transmission mode, and gives an alarm when the train is monitored to enter or leave the station.
Description
Technical Field
The invention relates to the field of rail transit, in particular to a train in-out alarming device based on wireless transmission.
Background
In recent years, unprecedented peaks of rail construction in China have come, along with continuous opening and operation of running lines, the number of trains entering and exiting a platform is greatly increased along with the increase of the speed increase of the existing lines, construction improvement, double-line electrification improvement and other projects for changing train data, and the number of train sections of the trains is increased.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a train in-and-out alarm device based on wireless transmission.
In order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows:
a train station-in and station-out alarm device based on wireless transmission comprises a solar energy collection module, an electric energy storage module, a train station-in and station-out detection module and a signal acquisition and transmission module consisting of a first wireless transmission module; the system comprises a direct current power supply module, a second wireless transmission module, a photoelectric isolation module, a microcomputer system module, a 555 timer module, a relay module and a sound-light alarm module;
the output end of the solar energy collection module is connected with the electric energy storage module, the output end of the electric energy storage module is connected with the train station in-and-out detection module and the first wireless transmission module to supply power for the train station in-and-out detection module, the output end of the train station in-and-out detection module is connected with the first wireless transmission module, the train station in-and-out detection module is used for monitoring the train station in-and-out, and detection signals are transmitted to the signal receiving alarm module through the first wireless transmission module;
the output end of the second wireless transmission module is connected to the input end of the photoelectric isolation module, the output end of the photoelectric isolation module is connected with the microcomputer system module, and the output end of the microcomputer system module is sequentially connected with the 555 timer module, the relay module and the audible and visual alarm module; the direct current power supply module supplies power to the second wireless transmission module, the photoelectric isolation module, the microcomputer system module and the sound-light alarm module; the second wireless transmission module receives the detection signal transmitted by the first wireless transmission module, uploads the detection signal to the microcomputer system module for real-time monitoring after the safety isolation of the photoelectric isolation module, and when the fact that the train needs to be sent in and out of the station for alarming is detected, the microprocessor is connected with the relay module through the 555 timer module to control the sound-light alarm module to work.
Furthermore, the solar energy collecting module adopts a solar cell panel, and the electric energy storage module adopts a lead-acid maintenance-free storage battery or a colloid storage battery.
Furthermore, the train station in-and-out detection module adopts a magnetic steel sensor and comprises three connecting wires, wherein two connecting wires are power lines and are connected with the electric energy storage module, and the remaining connecting wire is a signal wire and is connected with the first wireless transmission module; when no train passes through, the output of the magnetic steel sensor is at a low level, and when a train passes through, the output of the magnetic steel sensor is at high levels with different widths.
Furthermore, the first wireless transmission module and the second wireless transmission module are communicated by adopting ZigBee;
the ZigBee wireless network node is formed by a first wireless transmission module and comprises a data processing module and a radio frequency module; the data processing module comprises a singlechip and a memory, and the radio frequency module comprises a radio frequency transceiver and a power amplifier circuit; transmitting the acquired detection signal to a single chip microcomputer for encoding, and then transmitting the detection signal to a radio frequency module for wireless transmission;
the second wireless transmission module forms another ZigBee wireless network node and comprises a data processing module and a radio frequency module; the radio frequency module receives the wireless signal, transmits the wireless signal to the singlechip of the data processing module for decoding, and then transmits the wireless signal to the microcomputer system module.
Furthermore, the microcomputer system module adopts an ARM system, the output state of the magnetic steel sensor is judged by demodulating a wireless signal, namely whether a train enters or leaves a station, and the output of the configured I/O port carries out alarm control on the sound-light alarm module after the delay of a 555 timer.
Further, the 555 timer module is composed of a 555 chip and a peripheral resistor capacitor, and 5V is output by the ARM system to supply power to the ARM module; the output is low level in static state, and high level for a certain time when the trigger pulse arrives, the time for outputting the pulse is determined by a time constant tau, and tau = RC.
Furthermore, the control voltage of the relay module is provided by the output voltage of the 555 timer, when no train passes through, the output voltage of the 555 timer is at a low level, the sound-light alarm module is disconnected with the power supply, and the sound-light alarm module does not work; when a train passes by, the output of the 555 timer becomes high level, the normally open contact of the relay is closed, the sound-light alarm module is connected with the power supply, and the sound-light alarm module works.
Furthermore, the working time of the acousto-optic alarm module is determined by the time constant of the 555 timer.
The invention has the advantages that compared with the prior art, the device adopts each detection module to monitor whether the train enters or leaves the station, transmits the train to the microcomputer system for real-time monitoring in a wireless transmission mode, and gives an alarm when the train is monitored to enter or leave the station.
Drawings
FIG. 1 is a schematic diagram of a train station entering and exiting alarm device based on wireless transmission;
FIG. 2 is a schematic diagram of magnetic steel sensor output pulses;
FIG. 3 is a functional block diagram of a ZigBee wireless network node;
figure 4 is a circuit schematic of the 555 timer module.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the embodiment. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and the protection scope of the present application is not limited thereby.
As shown in figure 1, the train in-out alarm device based on wireless transmission comprises a solar energy collection module, an electric energy storage module, a train in-out detection module, a first wireless transmission module, a direct current power supply module, a second wireless transmission module, a photoelectric isolation module, a microcomputer system module, a 555 timer module, a relay module and an acousto-optic alarm module.
The system comprises a solar energy collecting module, an electric energy storage module, a train station in-out detection module, a first wireless transmission module, a signal collecting and transmitting module, an electric energy storage module, a train station in-out detection module and the first wireless transmission module, wherein the output end of the solar energy collecting module is connected with the electric energy storage module, the output end of the electric energy storage module is connected with the train station in-out detection module and the first wireless transmission module, power is supplied to the electric energy storage module, the first wireless transmission module is connected with the output end of the train station in-out detection module, the detection module is used for monitoring the train station in-out, the detection signal is transmitted to a microcomputer system in a wireless transmission mode through the first wireless transmission module for real-time monitoring, and when the train station in-out is monitored, alarming and reminding is carried out.
The direct current power supply module, the second wireless transmission module, the photoelectric isolation module, the microcomputer system module, the 555 timer module, the relay module and the sound-light alarm module form a signal receiving alarm module. The direct current power supply module is a second wireless transmission module and a photoelectric isolation module, the microcomputer system module and the sound and light alarm module supply power, the output end of the second wireless transmission module is connected to the input end of the photoelectric isolation module, the output end of the photoelectric isolation module is connected with the microcomputer system module, and the output end of the microcomputer system module is sequentially connected with the 555 timer module, the relay module and the sound and light alarm module.
The second wireless transmission module receives the detection signal transmitted by the first wireless transmission module in a wireless transmission mode, the detection signal is uploaded to a microcomputer system for real-time monitoring after being safely isolated by the photoelectric isolation module, when the fact that the train needs to be alarmed when entering and leaving the station is detected, the microprocessor is connected with and controls the sound-light alarm module to work through the relay module, and the working time of the sound-light alarm module is determined by the time constant of the 555 timer.
The solar energy collecting module adopts a solar cell panel, and the electric energy storage module adopts a storage battery. The solar panel converts solar radiation energy into electric energy through a photoelectric effect or a photochemical effect by absorbing sunlight, and the electric energy is stored through the storage battery. The lead-acid maintenance-free storage battery or the colloid storage battery is used as the storage battery, and the two types of storage batteries have the maintenance-free characteristic and low pollution, and are suitable for solar power systems with reliable performance, especially unattended workstations.
The solar cell panel adopts JDG series solar cell panel, the type is JDG-M8S100E, the nominal power is 8W, the peak voltage is 16.5-17.5V, the electric energy collected by the solar cell panel is stored by the storage battery, and the electric energy is provided for the train station entering and exiting detection module and the first wireless transmission module.
The voltage of battery can directly supply power to train business turn over station detection module, and train business turn over station detection module can adopt magnet steel sensor, and its concrete theory of operation is: when the active magnetic steel is not in the process of driving, the resonant circuit generates a sine wave signal, the indicator light is not on, and a high level or a low level is output to a user. When the vehicle passes, the condition of generating a sine wave signal is destroyed because the wheels are above the indicator light, and the indicator light is lightened to output an opposite level to a user. When a train passes through the magnetic steel sensor, the output level of the sensor can change, and whether the train passes through is judged by monitoring the output level of the magnetic steel.
The output end of the magnetic steel sensor is connected to the input end of the first wireless transmission module, when no train passes through, the output end of the magnetic steel sensor is at a low level, when a train passes through, the output end of the magnetic steel sensor is at high levels with different widths, and the width of the specific level depends on the time for triggering the magnetic steel sensor by the train.
The magnetic steel sensor is a large-continuous-curie-Limited magnetic steel sensor with the model number of TWS12-70P, the normal working voltage is 12V, three wiring terminals are provided, two of the three wiring terminals are power lines and are connected with the solar storage battery, and the remaining one wiring terminal is a signal line and is connected with the wireless transmission module. When no train passes through, the level output on the signal line is low level, when a train passes above the magnetic steel sensor, the magnetic steel sensor can output high level pulse for a period of time, the specific action mode is shown in fig. 2, and it can be seen from the figure that when the trigger signal is greater than 3S, the output signal is 3S high level pulse, and when the trigger signal is less than 3S, the pulse width of the output signal is equal to the trigger time of the trigger signal. Therefore, in practical application, when a train passes through, the magnetic steel sensor is triggered to output a high level for a certain time, and whether the train passes in and out can be judged by monitoring whether the magnetic steel sensor generates the high level.
The detection signal is transmitted to the second wireless transmission module of the signal receiving alarm module in a wireless transmission mode through the first wireless transmission module, and the fact that the transmission distance of the alarm device is short and the transmitted information is simple is only level signals output by magnetic steel is considered, so that ZigBee is used for communication in the selection of wireless communication.
The ZigBee technology is a two-way wireless communication technology with short distance, low complexity, low power consumption, low speed and low cost. The method for constructing a complete ZigBee mesh network comprises the following steps: network initialization and node joining in the network. The node joining the network comprises two steps: networking through the connection with the coordinator and networking through the existing parent node.
The first wireless transmission module forms a ZigBee wireless network node, and a functional block diagram of the node is shown in fig. 3 and includes a data acquisition module, a data processing module and a radio frequency module. The data acquisition module, namely the train station in-out detection module, comprises a magnetic steel sensor and an analog-to-digital conversion module, and acquired data signals are transmitted to the first wireless transmission module. The first wireless transmission module comprises a data processing module and a radio frequency module. In the first wireless transmission module, the data processing module specifically includes a PIC18F4620 single chip microcomputer and a corresponding memory, and the radio frequency module specifically includes a radio frequency transceiver CC2420 and a power amplifier circuit. The data acquisition module transmits the output signal to the singlechip, then codes the signal and transmits the signal to the radio frequency module for wireless transmission.
When the wireless transmission device is specifically implemented, debugging is carried out by means of a serial port debugging assistant, a string of numbers are input into the serial port debugging assistant and are sent to the input end of the first wireless transmission module, the output end of the second wireless transmission module is connected to an upper computer to be demodulated and then displayed, and whether the two wireless transmission modules can work normally or not is verified.
And the second wireless transmission module forms another ZigBee wireless network node, receives the detection signal sent by the first wireless transmission module and sends the detection signal to the microcomputer system module. The node also comprises a radio frequency module and a data processing module, wherein the radio frequency module specifically comprises a radio frequency transceiver CC2420 and a power amplifier circuit, and the data processing module specifically comprises a PIC18F4620 single chip microcomputer and a corresponding memory. The radio frequency module receives the wireless signal, transmits the wireless signal to the singlechip of the data processing module for decoding and storing, and then transmits the wireless signal to the microcomputer system module.
The microcomputer system module adopts an ARM system, the ARM system is an integrated circuit provided with a corresponding communication interface, and signals of the second wireless transmission module are processed by a built-in chip and then are connected to the communication interface of the ARM. The device can also provide 5V or 3.3V voltage, wherein the 5V voltage can be used for working voltage of a 555 timer, the output state of the magnetic steel sensor is judged by demodulating a wireless signal, namely whether a train enters or leaves a station is reflected, and the output of a configured I/O port carries out alarm control on an acousto-optic alarm module after the 555 timer delays.
The output is high level when there is a train passing, and is low level when there is no train passing. When the received magnetic steel sensor signal outputs a high level, the ARM system controls the I/O port to output a control signal, the control signal is output to the control end of the relay after the time delay of the 555 timer, and the relay controls the work of the acousto-optic alarm module.
A circuit schematic diagram of the 555 timer module is shown in fig. 4, and the 555 timer module is composed of a 555 chip and a peripheral resistor capacitor, wherein the input (namely the output of an I/O port of an ARM system) is high level and the output is low level in a static state; in a transient steady state, the input is low and the output is high. The high level sustain time is equal to the time constant τ = RC, which can be verified after determining the values of the resistance and capacitance, detecting whether the actual high level sustain time is the same as the set time.
The supply voltage Vcc of 555 timer is 5V, power conversion by the ARM system comes, the voltage of ARM's I/O mouth output connects at the Ui end, the output can export the high level of certain time when trigger pulse arrives, a operating time for exporting relay control audible-visual alarm module, wherein, the time of output pulse is decided by time constant tau, tau = RC, can the holding value of fixed capacitance, the resistance of resistance replaces with adjustable potentiometre, once adjust audible-visual alarm module's operating time.
The control voltage of the relay module is provided by the output voltage of the 555 timer, when no train passes through, the output voltage of the 555 timer is at a low level, the acousto-optic alarm module is disconnected with a 12V power supply, and the acousto-optic alarm module does not work; when a train passes by, the output of the 555 timer is changed into high level, the normally open contact of the relay is closed, the acousto-optic alarm module is connected with the 12V power supply, the acousto-optic alarm module works to remind workers of avoiding, and the working time is determined by the time constant of the 555 timer.
The invention has the advantages that compared with the prior art, the device adopts each detection module to monitor whether the train enters or leaves the station, transmits the train to the microcomputer system for real-time monitoring in a wireless transmission mode, and gives an alarm when the train is monitored to enter or leave the station.
The present applicant has described and illustrated embodiments of the present invention in detail with reference to the accompanying drawings, but it should be understood by those skilled in the art that the above embodiments are merely preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not for limiting the scope of the present invention, and on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the scope of the present invention.
Claims (8)
1. A train station-in and station-out alarm device based on wireless transmission is characterized by comprising a solar energy collection module, an electric energy storage module, a train station-in and station-out detection module and a signal acquisition and transmission module consisting of a first wireless transmission module; the signal receiving and alarming module comprises a direct current power supply module, a second wireless transmission module, a photoelectric isolation module, a microcomputer system module, a 555 timer module, a relay module and an audible and visual alarming module;
the output end of the solar energy collection module is connected with the electric energy storage module, the output end of the electric energy storage module is connected with the train station in-out detection module and the first wireless transmission module to supply power for the train station in-out detection module, the output end of the train station in-out detection module is connected with the first wireless transmission module, the train station in-out detection module is used for monitoring the train station in-out, and a detection signal is transmitted to the signal receiving alarm module through the first wireless transmission module;
the output end of the second wireless transmission module is connected to the input end of the photoelectric isolation module, the output end of the photoelectric isolation module is connected with the microcomputer system module, and the output end of the microcomputer system module is sequentially connected with the 555 timer module, the relay module and the audible and visual alarm module; the direct current power supply module supplies power to the second wireless transmission module, the photoelectric isolation module, the microcomputer system module and the sound-light alarm module; the second wireless transmission module receives the detection signal transmitted by the first wireless transmission module, uploads the detection signal to the microcomputer system module for real-time monitoring after the safety isolation of the photoelectric isolation module, and when the fact that the train needs to be sent in and out of the station for alarming is detected, the microprocessor is connected with the relay module through the 555 timer module to control the sound-light alarm module to work.
2. The train station entrance and exit alarm device based on wireless transmission as claimed in claim 1, wherein the solar energy collection module adopts a solar panel, and the electric energy storage module adopts a lead-acid maintenance-free storage battery or a colloid storage battery.
3. The train station-entering and station-exiting alarm device based on wireless transmission as claimed in claim 1, wherein the train station-entering and station-exiting detection module adopts a magnetic steel sensor and comprises three connecting wires, two of which are power wires and are connected with the electric energy storage module, and the remaining one is a signal wire and is connected with the first wireless transmission module; when no train passes through, the output of the magnetic steel sensor is at a low level, and when a train passes through, the output of the magnetic steel sensor is at high levels with different widths.
4. The train station entering and exiting alarm device based on wireless transmission is characterized in that the first wireless transmission module and the second wireless transmission module are communicated by ZigBee;
the ZigBee wireless network node is formed by a first wireless transmission module and comprises a data processing module and a radio frequency module; the data processing module comprises a singlechip and a memory, and the radio frequency module comprises a radio frequency transceiver and a power amplifier circuit; transmitting the acquired detection signal to a single chip microcomputer for encoding, and then transmitting the detection signal to a radio frequency module for wireless transmission;
the second wireless transmission module forms another ZigBee wireless network node and comprises a data processing module and a radio frequency module; the radio frequency module receives the wireless signal, transmits the wireless signal to the singlechip of the data processing module for decoding, and then transmits the wireless signal to the microcomputer system module.
5. The train station entering and exiting alarm device based on wireless transmission as claimed in claim 1, wherein the microcomputer system module adopts an ARM system, the output state of the magnetic steel sensor is judged by demodulating the wireless signal, i.e. whether the train enters or exits the station, and the output of the configured I/O port performs alarm control on the acousto-optic alarm module after the delay of the 555 timer.
6. The train station entering and exiting alarm device based on wireless transmission as claimed in claim 1, wherein the 555 timer module is composed of a 555 chip and a peripheral resistance capacitor, and is powered by 5V output by the ARM system; the output is low level in static state, and high level for a certain time when the trigger pulse arrives, the time for outputting the pulse is determined by a time constant tau, and tau = RC.
7. The train station entering and exiting alarm device based on wireless transmission as claimed in claim 1, wherein the control voltage of the relay module is provided by the output voltage of the 555 timer, when no train passes through, the output voltage of the 555 timer is at a low level, the sound and light alarm module is disconnected from the power supply, and the sound and light alarm module does not work; when a train passes by, the output of the 555 timer becomes high level, the normally open contact of the relay is closed, the sound-light alarm module is connected with the power supply, and the sound-light alarm module works.
8. The train station entrance and exit alarm device based on wireless transmission as claimed in claim 1, wherein the operation time of the acousto-optic alarm module is determined by the time constant of the 555 timer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210946446.8A CN115257875A (en) | 2022-08-08 | 2022-08-08 | Train station entering and exiting alarm device based on wireless transmission |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210946446.8A CN115257875A (en) | 2022-08-08 | 2022-08-08 | Train station entering and exiting alarm device based on wireless transmission |
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| CN115257875A true CN115257875A (en) | 2022-11-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115761913A (en) * | 2022-11-15 | 2023-03-07 | 广州北羊信息技术有限公司 | Railway special line delay accounting system |
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| CN203698308U (en) * | 2014-02-17 | 2014-07-09 | 陈昭颖 | Train arrival wireless pre-alarming system |
| CN105182886A (en) * | 2015-11-05 | 2015-12-23 | 罗文凤 | Wireless transmission-based factory workshop monitoring system |
| CN208306671U (en) * | 2018-05-30 | 2019-01-01 | 上海通铁通讯工程有限公司 | A kind of solar energy double-frequency wireless train approach warning system |
| JP3234013U (en) * | 2020-10-12 | 2021-09-16 | 中鉄三局集団線橋工程有限公司 | Intelligent computerized transportation regulation system for orbital transportation |
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2022
- 2022-08-08 CN CN202210946446.8A patent/CN115257875A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203698308U (en) * | 2014-02-17 | 2014-07-09 | 陈昭颖 | Train arrival wireless pre-alarming system |
| CN105182886A (en) * | 2015-11-05 | 2015-12-23 | 罗文凤 | Wireless transmission-based factory workshop monitoring system |
| CN208306671U (en) * | 2018-05-30 | 2019-01-01 | 上海通铁通讯工程有限公司 | A kind of solar energy double-frequency wireless train approach warning system |
| JP3234013U (en) * | 2020-10-12 | 2021-09-16 | 中鉄三局集団線橋工程有限公司 | Intelligent computerized transportation regulation system for orbital transportation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115761913A (en) * | 2022-11-15 | 2023-03-07 | 广州北羊信息技术有限公司 | Railway special line delay accounting system |
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