CN219738267U - Incoming vehicle early warning device - Google Patents
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- CN219738267U CN219738267U CN202321272241.2U CN202321272241U CN219738267U CN 219738267 U CN219738267 U CN 219738267U CN 202321272241 U CN202321272241 U CN 202321272241U CN 219738267 U CN219738267 U CN 219738267U
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Abstract
The utility model discloses an incoming vehicle early warning device, which can automatically detect whether an incoming vehicle passes through or not through the arrangement of an incoming vehicle detection module, and can control an alarm module to send out early warning through a control module so as to remind maintenance workers of paying attention to the arrival of the vehicle and ensure the safety of the workers. The global control of the whole incoming vehicle early warning device is realized through the control module. And through the arrangement of the alarm module, early warning is sent out in time and stopped. Through the setting of wireless alarm forwarding module to can inform outside communication equipment to take place the warning and ensure that the workman who is in the distal end has received this alarm condition, play further warning and confirm the effect, not only can play the early warning to the workman of near-end, can play the early warning to the workman of distal end moreover. Additional action can also be taken when no worker feedback is received, reducing potential safety hazards.
Description
Technical Field
The utility model relates to an incoming vehicle early warning device.
Background
In road maintenance work, workers often need to perform maintenance and repair work on a road line, resulting in exposure of workers to risks of vehicle travel and train travel. At present, an incoming vehicle early warning device is generally adopted to detect the passing of a vehicle, and an alarm is timely given to a worker to remind the worker to take necessary safety measures so as to ensure the safety of the worker. The coming car early warning device is a safety auxiliary device for road maintenance, railway maintenance and other operations, and generally detects a car on a road by using a sensor technology to remind a maintenance worker of paying attention to the coming of a train, thereby avoiding accidents.
Chinese patent publication No. CN115257875a discloses a wireless transmission-based train in-out alarm device, which can monitor whether a train is in-out by adopting each detection module, and transmit the signal to a microcomputer system for real-time monitoring in a wireless transmission manner, and alarm and prompt when the train is detected to be in-out. However, after receiving the detection signal transmitted by the first wireless transmission module, the second wireless transmission module of the alarm device is connected with the relay module through the 555 timer module to control the audible and visual alarm module to work, and only plays a role in reminding workers in a relatively close range. It cannot be ensured whether the overhauling personnel in a far range receive the alarm information, and potential safety hazards exist.
Therefore, how to overcome the above-mentioned drawbacks has become an important issue to be solved by the person skilled in the art.
Disclosure of Invention
The utility model overcomes the defects of the technology and provides the coming vehicle early warning device.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the incoming vehicle early warning device comprises an incoming vehicle early warning device body, wherein the incoming vehicle early warning device body comprises an incoming vehicle detection module, a control module, an alarm module, a wireless alarm forwarding module and a power supply module for supplying power to the modules; the control module is provided with a detection end connected with the incoming vehicle detection module and an alarm end connected with the alarm module, the detection end is used for detecting whether an incoming vehicle exists, the alarm end is used for outputting an alarm trigger signal to the alarm module and outputting an alarm notification signal to the wireless alarm forwarding module when the incoming vehicle is detected, the wireless alarm forwarding module is in communication connection with the control module, and the wireless alarm forwarding module forwards the alarm notification signal to external communication equipment and receives a feedback signal output by the external communication equipment so as to confirm that an operator at a far end receives early warning.
Preferably, the wireless alarm forwarding module includes: the 4G communication module interface circuit is in communication connection with the control module, or the 433M wireless module interface circuit is in communication connection with the control module, or the 2.4G wireless module interface circuit is in communication connection with the control module, and whether the 433M wireless module interface circuit or the 2.4G wireless module interface circuit is in communication with the detection end of the control module can be judged by sending a handshake signal.
Preferably, the coming vehicle detection module comprises a radar sensor and a peripheral circuit thereof, and a radar switch signal output end of the radar sensor is connected with a detection end of the control module.
Preferably, the control module comprises a singlechip with a chip model STM32F103C8T6 and peripheral circuits thereof.
Preferably, the alarm module comprises a BUZZER BUZZER, a diode D5, a resistor R14, a light emitting diode D6, a field effect tube Q1, a resistor R15 and a resistor R16, wherein the positive electrode of the BUZZER BUZER is respectively connected with the output end of the power module, one end of the resistor R14 and the negative electrode of the diode D5, the negative electrode of the BUZZER BUZER is respectively connected with the negative electrode of the light emitting diode D6, the positive electrode of the diode D5 and the drain electrode of the field effect tube Q1, the other end of the resistor R14 is connected with the positive electrode of the light emitting diode D6, the source electrode of the field effect tube Q1 is connected with one end of the resistor R16 and the ground terminal, the other end of the resistor R16 is respectively connected with one end of the resistor R15 and the grid electrode of the field effect tube Q1, and the other end of the resistor R15 is used as the input end of the alarm module to be connected with the control module.
Preferably, the power supply module comprises a power switch circuit, a DC-DC circuit and an LDO circuit which are sequentially connected, wherein the power switch circuit is used for outputting a first power supply voltage, the DC-DC circuit is used for outputting a second power supply voltage, and the LDO circuit is used for outputting a third power supply voltage.
Preferably, the power switch circuit comprises a first public port P1, a charging interface P2 connected with an external charging device, a diode D4, a battery J5 and a resistor R47, wherein a first end of the first public port P1 is connected with a positive electrode of the charging interface P2 through the diode D4 connected in reverse series, a second end of the first public port P1 is connected with a positive electrode of the battery J5, a third end of the first public port P1 is connected with one end of the resistor R47, and the other end of the resistor R47 is used as a first power supply voltage output end of the power switch circuit and is connected with the DC-DC circuit, and a fourth end of the first public port P1, a negative electrode of the charging interface P2 and a negative electrode of the battery J5 are grounded; the DC-DC circuit comprises a step-down converter IC8 with the model MP1477 and peripheral circuits thereof; the LDO circuit includes a linear regulator IC9 of model ME6210A33M3G and its peripheral circuits.
Preferably, the control module is connected with a battery voltage detection module, the input end of the battery voltage detection module is connected with the positive electrode of the battery J5, the output end of the battery voltage detection module is connected with the voltage detection end connected with the control module, the battery voltage detection module comprises a resistor R48, a resistor R49 and a resistor R50, one end of the resistor R48 is connected with the positive electrode of the battery J5 as the input end of the battery voltage detection module, the other end of the resistor R48 is connected with one end of the resistor R50 and one end of the resistor R49 respectively, the other end of the resistor R49 is connected with the control module as the output end of the battery voltage detection module, and the other end of the resistor R50 is grounded.
Preferably, the wireless alarm forwarding module is also in communication connection with an external remote controller so as to receive remote control signals and transmit the remote control signals to an alarm end of the control module.
Preferably, the control module is connected with a working mode switch circuit for selecting an automatic control alarm mode and a manual control alarm mode and a working state indicator lamp circuit.
Compared with the prior art, the utility model has the beneficial effects that:
1. the scheme can automatically detect whether an incoming vehicle passes through or not through the arrangement of the incoming vehicle detection module, and an early warning is sent out through the control module control alarm module, so that maintenance workers are reminded of paying attention to the arrival of the vehicle, and the safety of the workers is guaranteed. The global control of the whole incoming vehicle early warning device is realized through the control module. And through the arrangement of the alarm module, early warning is sent out in time and stopped. Through the setting of wireless alarm forwarding module to can inform outside communication equipment to take place the warning and ensure that the workman who is in the distal end has received this alarm condition, play further warning and confirm the effect, not only can play the early warning to the workman of near-end, can play the early warning to the workman of distal end moreover. Additional action can also be taken when no worker feedback is received, reducing potential safety hazards.
2. The BUZZER BUZZZER and the light-emitting diode D6 of the alarm module are arranged so as to realize acousto-optic early warning. The resistor R14 is arranged so as to limit the current in the light-emitting diode D6, and the internal PN junction can not be burnt out by the larger current when the light-emitting diode D6 emits light normally. The diode D5 is arranged to act as a freewheeling diode to act as a freewheeling in the circuit. The field effect tube Q1 is arranged and mainly plays a role of a controlled switch, and the buzzer can be controlled to sound or stop sounding by controlling the on and off of the field effect tube Q1 through the control module. The resistor R16 is arranged to discharge ESD static electricity, thereby protecting the fet Q1. The resistor R15 is arranged to flatten the rising and falling edges to protect the fet Q1.
Drawings
Fig. 1 is a schematic structural diagram of the present case.
Fig. 2 is a circuit diagram of the interface circuit of the 4G communication module.
Fig. 3 is a circuit diagram of the 433M wireless module interface circuit.
Fig. 4 is a circuit diagram of the present case 2.4G wireless module interface circuit.
Fig. 5 is a circuit diagram of the present approach detection module.
Fig. 6 is a circuit diagram of the control module of the present case.
Fig. 7 is a circuit diagram of the alarm module of the present case.
Fig. 8 is a circuit diagram of the power switching circuit of the present case.
Fig. 9 is a circuit diagram of the DC-DC circuit of the present case.
Fig. 10 is a circuit diagram of the LDO circuit of the present case.
Fig. 11 is a circuit diagram of the battery voltage detection module of the present case.
Fig. 12 is a circuit diagram of the present operating mode switching circuit.
Fig. 13 is a circuit diagram of the present operating status indicator light circuit.
Detailed Description
The following examples are provided to illustrate the features of the present utility model and other related features in further detail to facilitate understanding by those skilled in the art:
as shown in fig. 1 to 13, an incoming vehicle early warning device comprises an incoming vehicle early warning device body 100, wherein the incoming vehicle early warning device body 100 comprises an incoming vehicle detection module 1, a control module 2, an alarm module 3, a wireless alarm forwarding module 4 and a power module 5 for supplying power to the modules; the control module 2 is provided with a detection end T1 connected with the coming car detection module 1 and an alarm end T2 connected with the alarm module 3, the detection end T1 is used for detecting whether a coming car exists, the alarm end T2 is used for outputting an alarm trigger signal to the alarm module 3 and an alarm notification signal to the wireless alarm forwarding module 4 when the coming car exists, the wireless alarm forwarding module 4 is in communication connection with the control module 2, and the wireless alarm forwarding module 4 forwards the alarm notification signal to external communication equipment and receives a feedback signal output by the external communication equipment so as to confirm that an operator at a far end receives an early warning.
As described above, the scheme can automatically detect whether an incoming vehicle passes through or not through the arrangement of the incoming vehicle detection module 1, and the control module 2 controls the alarm module 3 to send out early warning so as to remind maintenance workers of paying attention to the arrival of the vehicle, so that the safety of the workers is guaranteed. Global control of the whole coming vehicle early warning device is achieved through the control module 2. Through the setting of alarm module 3, in time send early warning and stop early warning. Through the setting of wireless alarm forwarding module 4 to can inform outside communication device to take place the warning and ensure that the workman who is in the distal end has received this alarm condition, play further warning and confirm the effect, not only can play the early warning to the workman of near-end, can play the early warning to the workman of distal end moreover. Additional action can also be taken when no worker feedback is received, reducing potential safety hazards.
As shown in fig. 1 to 4, the wireless alarm forwarding module 4 includes: the 4G communication module interface circuit 41 or the 433M wireless module interface circuit 42 or the 2.4G wireless module interface circuit 43 which are in communication connection with the control module 2 can judge whether the communication with the detection terminal T1 of the control module 2 is successful or not by sending a handshake signal by the 433M wireless module interface circuit 42 or the 2.4G wireless module interface circuit 43. In specific implementation, the 4G communication module interface circuit 41 is connected with the full-network communication 4G communication module including an antenna, the 433M wireless module interface circuit 42 is connected with the 433MHz communication module including an antenna, and the 2.4G wireless module interface circuit 43 is connected with the 2.4GHz communication module including an antenna.
As described above, the arrangement of the 4G communication module interface circuits 41, 433M wireless module interface circuit 42 and the 2.4G wireless module interface circuit 43 can be respectively connected with different wireless communication modules, so as to satisfy the wireless transmission between different devices, for example, the 4G communication module can be applied to the wireless of the mobile phone device, and when a communication failure occurs in a certain communication module, the other wireless communication modules can be used as standby, so as to improve the communication stability of the coming vehicle early warning device; and by utilizing the characteristic that the 433M wireless module interface circuit 42 or the 2.4G wireless module interface circuit 43 can send handshake signals, whether the communication with the detection end T1 of the control module 2 is successful or not is judged, the communication self-checking function is realized, and the coming vehicle early warning device is ensured to be in a communication state all the time.
As shown in fig. 5, the coming detection module 1 includes a radar sensor 11 and its peripheral circuit, and a radar switch signal output end of the radar sensor 11 is connected to a detection end T1 of the control module 2. Therefore, the function of automatically detecting the coming vehicle is realized by continuously detecting the radar switch signal, and the alarm can be triggered in time.
As shown in fig. 6, the control module 2 includes a single chip microcomputer with a chip model number of STM32F103C8T6 and peripheral circuits thereof. In specific implementation, the peripheral circuit of the singlechip comprises a power supply filter circuit 21 and is connected with a program burning interface 22. In this way, the advantages of high performance, low cost, and low power consumption of STM32F103C8T6 can be exploited to facilitate connection with the various modules.
As shown in fig. 7, the alarm module 3 includes a BUZZER, a diode D5, a resistor R14, a light emitting diode D6, a field effect transistor Q1, a resistor R15, and a resistor R16, wherein the positive electrode of the BUZZER is connected with the output end of the power module 5, one end of the resistor R14, and the negative electrode of the diode D5, the negative electrode of the BUZZER is connected with the negative electrode of the light emitting diode D6, the positive electrode of the diode D5, and the drain electrode of the field effect transistor Q1, the other end of the resistor R14 is connected with the positive electrode of the light emitting diode D6, the source electrode of the field effect transistor Q1 is connected with one end of the resistor R16 and the ground, the other end of the resistor R16 is connected with one end of the resistor R15 and the gate electrode of the field effect transistor Q1, and the other end of the resistor R15 is connected with the control module 2 as the input end of the alarm module 3. In specific implementation, the alarm module 3 is actually a buzzer driving circuit. In specific implementation, the fet Q1 may be a type NCE3010S fet.
As described above, the BUZZER of the alarm module 3 and the light emitting diode D6 are arranged so as to realize acousto-optic early warning. The resistor R14 is arranged so as to limit the current in the light-emitting diode D6, and the internal PN junction can not be burnt out by the larger current when the light-emitting diode D6 emits light normally. The diode D5 is arranged to act as a freewheeling diode to act as a freewheeling in the circuit. The field effect tube Q1 is arranged and mainly plays a role of a controlled switch, and the buzzer can be controlled to sound or stop sounding by controlling the on and off of the field effect tube Q1 through the control module 2. The resistor R16 is arranged to discharge ESD static electricity, thereby protecting the fet Q1. The resistor R15 is arranged to flatten the rising and falling edges to protect the fet Q1.
As shown in fig. 1 and fig. 8 to 10, the power module 5 includes a power switch circuit 51, a DC-DC circuit 52, and an LDO circuit 53, which are sequentially connected, the power switch circuit 51 is configured to output a first supply voltage, the DC-DC circuit 52 is configured to output a second supply voltage, and the LDO circuit 53 is configured to output a third supply voltage. In a specific implementation, the first supply voltage output by the power switch circuit 51 is 12V, and is used for supplying power to the alarm module 3. The second power supply voltage output by the DC-DC circuit 52 is 5V, and is used for supplying power to the coming vehicle detection module 1 and the wireless alarm forwarding module 4. The third supply voltage output by the LDO circuit 53 is 3.3V, and is used to supply power to the control module 2.
As shown in fig. 8 to 10, in the embodiment, the power switch circuit 51 includes a first common port P1, a charging interface P2 connected to an external charging device, a diode D4, a battery J5, and a resistor R47, where a first end of the first common port P1 is connected to a positive electrode of the charging interface P2 through the diode D4 connected in anti-series, a second end of the first common port is connected to a positive electrode of the battery J5, a third end of the first common port is connected to one end of the resistor R47, and the other end of the resistor R47 is connected to the DC-DC circuit 52 as a first power supply voltage output end of the power switch circuit 51, and a fourth end of the first common port P1, a negative electrode of the charging interface P2, and a negative electrode of the battery J5 are all grounded; the DC-DC circuit 52 includes a buck converter IC8 of model MP1477 and its peripheral circuitry; the LDO circuit 53 includes a linear regulator IC9 of model ME6210A33M3G and its peripheral circuits. So to satisfy the power supply demand of different modules, the suitability is strong.
As shown in fig. 11, in the embodiment, the control module 3 is connected with a battery voltage detection module 6, an input end of the battery voltage detection module 6 is connected with a positive electrode of the battery J5, an output end of the battery voltage detection module 6 is connected with a voltage detection end T3 connected with the control module 3, the battery voltage detection module 6 includes a resistor R48, a resistor R49, and a resistor R50, one end of the resistor R48 is connected with the positive electrode of the battery J5 as an input end of the battery voltage detection module 6, the other end is connected with one end of the resistor R50 and one end of the resistor R49 respectively, the other end of the resistor R49 is connected with the control module 2 as an output end of the battery voltage detection module 6, and the other end of the resistor R50 is grounded. Therefore, the battery voltage detection module 6 can monitor the battery electric quantity in real time, and can be replaced in time when the electric quantity is insufficient, and the resistor R48 and the resistor R50 of the battery voltage detection module 6 play a role in voltage division, so that the battery voltage is prevented from being directly transmitted to the control module 2 for voltage detection to cause overvoltage damage; the resistor R49 is provided to protect the voltage detection terminal T3 when the battery voltage is abnormally high.
In the implementation, the wireless alarm forwarding module 4 is further connected to an external remote controller in a communication manner, so as to receive the remote control signal and transmit the remote control signal to the alarm terminal T2 of the control module 2. Thus, the alarm can be controlled manually by a remote controller.
As shown in fig. 12 and 13, the control module 3 is connected with an operation mode switch circuit 7 for selecting an automatic control alarm mode and a manual control alarm mode, and with an operation state indicator lamp circuit 8. In specific implementation, the working mode switch circuit 7 includes a two-gear three-pin toggle switch P3 and its peripheral circuits. Therefore, manual early warning and automatic early warning are selected automatically, whether each module works normally or not is confirmed through the indicator lamp, and the practicability is good.
The working process of the incoming vehicle early warning device is as follows:
first, the automatic control alarm mode and the manual control alarm mode can be selected by the operation mode switch circuit 7.
Automatic control alarm mode: the radar sensor 11 of the coming vehicle detection module 1 detects whether a vehicle is present. When no radar switch signal is detected, the vehicle is in a standby state, communication self-check and battery voltage detection are carried out every 1 minute, and the communication self-check is used for detecting whether the detection end T1 of the control module 2 and the wireless alarm forwarding module 4 are successfully communicated. When a radar switch signal is detected, the presence of a vehicle is confirmed, and the detection signal is transmitted to a detection terminal T1 of the control module 2. The control module 2 receives the radar switch signal transmitted by the radar sensor 11 through the detection end T1 thereof, outputs an alarm trigger signal to the alarm module 3 through the alarm end T2 thereof, and outputs an alarm notification signal to the wireless alarm forwarding module 4 when the detection end T1 is detected to be successful in communication. The alarm module 3 receives the alarm trigger signal and starts the buzzer to alarm; the wireless alarm forwarding module 4 forwards the alarm notification signal to the external communication equipment, and when receiving the feedback signal output by the external communication equipment, the buzzer turns off the alarm for 30 seconds.
The communication self-checking process comprises the following steps: the wireless alarm forwarding module 4 firstly sends a handshake signal through a 433MHz communication module containing antenna connected with the 433M wireless module interface circuit 42, if the feedback signal of the detection end T1 indicates that the handshake is successful, otherwise, continues to send the handshake signal at intervals of N2 seconds, and if the continuous transmission is unsuccessful, the communication fault is indicated. And then the 2.4GHz communication module connected with the 2.4G wireless module interface circuit 43 is used for sending handshake signals by the antenna, and when the communication fails, the buzzer sounds.
Manual control alarm mode: the on signal or the off signal is sent through an external remote controller, and the on signal or the off signal is forwarded to an alarm end T2 of the control module 2 through a 433MHz communication module of the wireless alarm forwarding module 4, so that a BUZZER BUZZER of the alarm module 3 is controlled to send out an alarm and stop the alarm.
As described above, the present disclosure protects an incoming vehicle early warning device, and all technical schemes which are the same as or similar to the present disclosure should be shown as falling within the protection scope of the present disclosure.
Claims (9)
1. The incoming vehicle early warning device comprises an incoming vehicle early warning device body and is characterized by comprising an incoming vehicle detection module, a control module, an alarm module, a wireless alarm forwarding module and a power module for supplying power to the modules; the control module is provided with a detection end connected with the coming vehicle detection module and an alarm end connected with the alarm module, the detection end is used for detecting whether a coming vehicle exists, the alarm end is used for outputting an alarm trigger signal to the alarm module and an alarm notification signal to the wireless alarm forwarding module when the coming vehicle is detected, the wireless alarm forwarding module is in communication connection with the control module, and the wireless alarm forwarding module forwards the alarm notification signal to external communication equipment and receives a feedback signal output by the external communication equipment so as to confirm that an operator at a far end receives early warning; the power supply module comprises a power switch circuit, a DC-DC circuit and an LDO circuit which are connected in sequence, wherein the power switch circuit is used for outputting a first power supply voltage, the DC-DC circuit is used for outputting a second power supply voltage, and the LDO circuit is used for outputting a third power supply voltage.
2. The coming car warning device according to claim 1, wherein the wireless warning forwarding module comprises: the 4G communication module interface circuit is in communication connection with the control module, or the 433M wireless module interface circuit is in communication connection with the control module, or the 2.4G wireless module interface circuit is in communication connection with the control module, and whether the 433M wireless module interface circuit or the 2.4G wireless module interface circuit is in communication with the detection end of the control module can be judged by sending a handshake signal.
3. The coming car early warning device according to claim 1, wherein the coming car detection module comprises a radar sensor and a peripheral circuit thereof, and a radar switch signal output end of the radar sensor is connected with a detection end of the control module.
4. The coming vehicle early warning device according to claim 1, wherein the control module comprises a singlechip with a chip model STM32F103C8T6 and peripheral circuits thereof.
5. The coming vehicle early warning device according to claim 1, wherein the alarm module comprises a BUZZER, a diode D5, a resistor R14, a light emitting diode D6, a field effect transistor Q1, a resistor R15 and a resistor R16, wherein the positive electrode of the BUZZER is respectively connected with the output end of the power module, one end of the resistor R14 and the negative electrode of the diode D5, the negative electrode of the BUZZER is respectively connected with the negative electrode of the light emitting diode D6, the positive electrode of the diode D5 and the drain electrode of the field effect transistor Q1, the other end of the resistor R14 is connected with the positive electrode of the light emitting diode D6, the source electrode of the field effect transistor Q1 is connected with one end of the resistor R16 and the ground terminal, the other end of the resistor R16 is respectively connected with one end of the resistor R15 and the gate electrode of the field effect transistor Q1, and the other end of the resistor R15 is used as the input end of the alarm module to be connected with the control module.
6. The coming vehicle early warning device according to claim 1, wherein the power switch circuit comprises a first common port P1, a charging interface P2 connected with an external charging device, a diode D4, a battery J5 and a resistor R47, wherein the first end of the first common port P1 is connected with the positive electrode of the charging interface P2 through the diode D4 connected in reverse series, the second end is connected with the positive electrode of the battery J5, the third end is connected with one end of the resistor R47, the other end of the resistor R47 is connected with the DC-DC circuit as a first power supply voltage output end of the power switch circuit, and the fourth end of the first common port P1, the negative electrode of the charging interface P2 and the negative electrode of the battery J5 are all grounded; the DC-DC circuit comprises a step-down converter IC8 with the model MP1477 and peripheral circuits thereof; the LDO circuit includes a linear regulator IC9 of model ME6210A33M3G and its peripheral circuits.
7. The coming car early warning device according to claim 6, wherein the control module is connected with a battery voltage detection module, an input end of the battery voltage detection module is connected with a positive electrode of the battery J5, an output end of the battery voltage detection module is connected with a voltage detection end of the control module, the battery voltage detection module comprises a resistor R48, a resistor R49 and a resistor R50, one end of the resistor R48 is connected with the positive electrode of the battery J5 as an input end of the battery voltage detection module, the other end of the resistor R48 is connected with one end of the resistor R50 and one end of the resistor R49 respectively, the other end of the resistor R49 is connected with the control module as an output end of the battery voltage detection module, and the other end of the resistor R50 is grounded.
8. The incoming car warning device according to claim 1, wherein the wireless warning forwarding module is further in communication connection with an external remote controller for receiving a remote control signal and transmitting the remote control signal to a warning end of the control module.
9. The incoming vehicle warning device according to any one of claims 1 to 8, characterized in that the control module is connected with an operation mode switch circuit for selecting an automatic control warning mode and a manual control warning mode and with an operation status indicator lamp circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321272241.2U CN219738267U (en) | 2023-05-23 | 2023-05-23 | Incoming vehicle early warning device |
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| CN202321272241.2U CN219738267U (en) | 2023-05-23 | 2023-05-23 | Incoming vehicle early warning device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113361945A (en) * | 2021-06-22 | 2021-09-07 | 珠海一粟科技有限公司 | Maintenance work order management method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113361945A (en) * | 2021-06-22 | 2021-09-07 | 珠海一粟科技有限公司 | Maintenance work order management method and system |
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