CN112937498A - Seat belt monitoring system - Google Patents

Abstract

The invention relates to the field of detection of safety belts, and discloses a safety belt monitoring system, which comprises at least one seat, a sensor assembly, a detection unit and a reminding unit, wherein the sensor assembly is arranged on the seat; the seat belt monitoring system provided by the invention has the following advantages: (1) an optical coupling isolation port is adopted to receive the output signal of the sensor, so that potential safety hazards caused by electric connection or limited system operation time caused by batteries in wireless connection are avoided; (2) only one seat sensor and one safety belt sensor are required to be installed on each seat, so that the installation cost is reduced, and the fault points are reduced to the minimum; (3) the seat number is displayed through the corresponding seat number indicating lamp and the corresponding seat number voice broadcast mode, one-to-one correspondence alarming is carried out on the seat number, the detection unit can be expanded according to the number of seats, the system can change according to the number of seats of a passenger car, and the flexibility of expanding and using of the system is guaranteed.

Description

Seat belt monitoring system

Technical Field

The invention relates to the technical field of detection of safety belts, in particular to a safety belt monitoring system.

Background

The safety belt is a basic device for guaranteeing the personal safety of drivers and passengers in the driving process of the vehicle, and can protect the drivers and passengers from secondary collision or being thrown out of the vehicle when the vehicle is in violent collision or in sudden events such as rollover and the like.

With the improvement of safety awareness, automobile safety belts are increasingly applied to various fields, and the safety belts are particularly important as passenger cars which are vehicles carrying more passengers. The importance of the safety belt of the passenger as a riding individual is not enough, and the driver has the obligation and responsibility as a master controller of the whole vehicle to remind the passenger to fasten the safety belt. On the way, if the passenger unties the safety belt privately, the driver can't know, can not play fine suggestion effect, has great potential safety hazard.

Patent publication No. CN208993645U discloses a seat belt detection system, comprising: the safety belt detection system comprises a seat sensor, a safety belt sensor and a detection terminal; the seat sensor and the safety belt sensor are respectively in communication connection with the detection terminal, and the seat sensor is used for detecting pressure information on a seat; the safety belt sensor is used for detecting safety belt fastening information; the detection terminal is used for detecting a first voltage value at two ends of the seat sensor and a second voltage value at two ends of the safety belt sensor according to the pressure information and the safety belt fastening information and a preset voltage acquisition period, matching the first voltage value and the second voltage value with preset safety conditions, and determining the safety belt fastening state after a passenger sits on the seat according to a matching result.

The defect of the solution is that because the detection of the seat sensor and the safety belt sensor adopts a voltage value comparison mode, if the seat sensor and the safety belt sensor are connected with the detection terminal in a wired communication mode, the voltage and the current transmitted by the connection mode can cause potential safety hazards, and particularly for the closed environment of a passenger car, the connection mode has larger potential fire hazards; if the seat sensor, the safety belt sensor and the detection terminal are connected in a wireless communication mode, when the electric quantity of the battery is insufficient, signal transmission errors or transmission failure can be caused, the fastening state of the safety belt cannot be judged correctly, and the running time of the system is limited.

Publication No. CN109466503A discloses a car blet detecting system, including power supply, seat detection module, main control unit, safety belt state detection module, alarm device and host computer. The output end of the seat detection module is connected with the controlled end of the power supply; the power supply is respectively and electrically connected with the main controller, the safety belt state detection module and the alarm device; the output end of the safety belt state detection module is connected with the input end of the main controller, and the output end of the main controller is connected with the alarm device and the upper computer respectively.

The defect of the solution is that each seat is required to be provided with a power supply, a seat detection module, a main controller, a safety belt state detection module and an alarm device, so that on one hand, the installation cost is increased, on the other hand, each seat has five fault points, and the fault maintenance is difficult.

The patent publication No. CN109843658A discloses a seat belt condition monitoring system comprising a control module mounted in a vehicle cabin, and at least one sensor module integrated into the at least one seat. The sensor module comprises a sensing system for sensing an occupancy-related state associated with the seat, wherein the control module is arranged to communicate wirelessly with the sensor module. The control module includes at least three transmit RF antennas configured to transmit request signals in at least three directions within a vehicle cabin; and the sensor module is further configured to receive the request signal from the at least three directions, determine a reception parameter of the request signal, and transmit information generated in response to the reception parameter to the control module.

The disadvantage of this solution is that the arrangement of the antennas for transmitting the signals requires, for large passenger vehicles, the seat to be divided into a plurality of zones, each zone being provided with an antenna and a control module, requiring a re-planning of the whole system, resulting in a limited flexibility of expansion of the system.

Disclosure of Invention

The object of the present invention is to provide a seat belt monitoring system aimed at solving the drawbacks of the solutions disclosed above.

The invention is realized in the way, and the technical scheme adopted by the seat belt monitoring system is as follows: a seat belt monitoring system comprising:

at least one seat, each said seat having a seat number corresponding thereto;

a sensor assembly including a seat sensor and a seat belt sensor mounted to the seat, the seat sensor for detecting a pressure of a human body, the seat sensor generating a first output signal when a human is seated on the seat; the safety belt sensor is used for detecting whether a safety belt is fastened or not, and when the safety belt is fastened, the safety belt sensor generates a second output signal;

the detection unit is provided with an optical coupling isolation port, the optical coupling isolation port comprises a seat optical coupling isolation port for receiving the first output signal and a safety belt optical coupling isolation port for receiving the second output signal, and the first output signal and the second output signal are converted into a first detection signal and a second detection signal through an optical coupling;

the reminding unit is provided with an indicator light, and controls the state change of the indicator light according to the received first detection signal and the second detection signal so as to prompt that the seat number of the safety belt is not fastened; and for the condition that the first detection signal is received but the second detection signal is not received, the reminding unit sends out voice alarm to remind that the seat belt of the seat number is not fastened.

Further, the reminding unit comprises a control unit, an indicator light display unit and a voice unit which are electrically connected, the control unit sends an alarm signal to the indicator light display unit and the voice unit under the condition that the first detection signal is received but the second detection signal is not received, so that the indicator light display unit and the voice unit send an alarm prompt by controlling the state change of the seat belt sensor indicator light of the seat number and the voice broadcast of the seat number.

Furthermore, the control unit comprises a voltage control unit, an MCU, a trigger data serial port, a communication unit, a download program serial port, a clock control unit and a display control unit which are electrically connected; the voltage control unit is used for adjusting the voltage input into the control unit so as to stabilize the voltage output to the control unit; the MCU analyzes and processes the received first detection signal and the second detection signal and sends out corresponding control signals to ensure that the function of the whole system is normal; the trigger data serial port is used for sending the voice alarm signal sent by the MCU to the voice unit; the communication unit is used for receiving the first detection signal and the second detection signal and transmitting a control signal sent by the MCU to the voice unit and the indicator light display unit; the download program serial port is used for downloading the edited control program to the MCU; the clock control unit is used for providing a relatively accurate real-time clock and calendar; the display control unit is used for amplifying the control signal sent by the MCU.

Furthermore, the indicator light display unit comprises an indicator light control unit, a seat sensor indicator light display unit, a safety belt sensor indicator light display unit, a power indicator light display unit, a voice indicator light display unit, a seat monitoring indicator light display unit and a safety belt monitoring indicator light display unit which are electrically connected; the indicating lamp control unit is used for amplifying the received control signal sent by the MCU and driving the indicating lamp display unit of the seat sensor, the indicating lamp display unit of the safety belt sensor, the power indicating lamp display unit, the voice indicating lamp display unit, the seat monitoring indicating lamp display unit and the indicating lamp state arranged on the indicating lamp display unit of the safety belt monitoring to change; the seat sensor indicator lamp display unit comprises a seat sensor indicator lamp used for indicating whether the control unit receives the first detection signal sent by the seat sensor corresponding to the seat sensor indicator lamp; the safety belt sensor indicator lamp display unit comprises a safety belt sensor indicator lamp used for indicating whether the control unit receives the second detection signal sent by the safety belt sensor corresponding to the safety belt sensor indicator lamp; the power indicator lamp display unit comprises a power indicator lamp which is used for indicating the working state of the system; the voice indicator lamp display unit comprises a voice indicator lamp, and the voice indicator lamp is used for indicating the working state of the voice unit; the seat monitoring indicator lamp display unit comprises a seat monitoring indicator lamp, and the seat monitoring indicator lamp is used for indicating the working state of the seat sensor; the safety belt monitoring indicator lamp display unit comprises a safety belt monitoring indicator lamp, and the safety belt monitoring indicator lamp is used for indicating the working state of the safety belt sensor.

Further, the voice unit comprises a voice control unit and a power amplifier unit which are electrically connected, the voice control unit plays the appointed voice content according to the received alarm signal, and the power amplifier unit pushes the external loudspeaker to sound.

Furthermore, the detection unit comprises a signal processing unit, a trigger signal input serial port, a power supply communication signal input serial port and a communication signal output serial port; the trigger signal input serial port is that the opto-coupler isolation port is used for receiving first output signal with second output signal, signal processing unit is used for right first output signal with second output signal carries out the opto-coupler conversion, so that first output signal with second output signal pass through the opto-coupler conversion into with first detection signal with the second detection signal, power communication signal input serial port is used for connecting external power supply, communication signal output serial port is used for connecting speech output and external extension equipment.

Furthermore, the detection unit further comprises a first monitoring port and a first control port, and the reminding unit further comprises a second monitoring port and a second control port; the first monitoring port is connected with the second monitoring port so that the first detection signal and the second detection signal are transmitted to the control unit; the first control port is connected with the second control port, so that signal data of the control unit is transmitted to the detection unit.

Further, the external expansion device is an on-board unit or a cloud DTU, the on-board unit or the cloud DTU is connected with a cloud server through a communication module, the signal data received by the first control port are forwarded to the cloud server, and the cloud server stores the signal data for being called by a client connected with the cloud server.

Further, the seat sensor is a film pressure sensor, the seat sensor is mounted below a cushion of the seat, and the seat sensor generates the first output signal when sensing the weight of the human body; the safety belt sensor is a switch type sensor, the safety belt sensor is installed at a safety belt socket, and when the safety belt is buckled, the safety belt sensor generates a second output signal.

Further, the detection unit further comprises a third monitoring port and a third control port, and the third monitoring port and the third control port are used for expanding the detection unit, so that the detection unit can be expanded along with the increase of the number of seat belts.

Compared with the prior art, the seat belt monitoring system provided by the invention has the following advantages compared with the disclosed solution:

1) because the sensor assembly is connected with the detection unit through the optical coupling isolation port, and no electric direct connection exists between the sensor assembly and the detection unit, on one hand, the potential safety hazard caused by electric connection in a wired connection mode is avoided, and on the other hand, the limitation of the system operation time caused by the use of a battery in a wireless connection mode is avoided;

2) only one seat sensor and one safety belt sensor are required to be installed on each seat, so that the installation cost is reduced, and the fault point of each seat is reduced to the minimum;

3) the seat number is displayed through the corresponding seat number indicating lamp and the corresponding seat number voice broadcast mode, one-to-one correspondence alarming is carried out on the seat number, the detection unit can be expanded according to the number of seats, the system can change according to the number of seats of a passenger car, and the flexibility of expanding and using of the system is guaranteed.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a seat belt monitoring system according to an embodiment of the present invention.

Fig. 2 is a schematic circuit board diagram of the control unit of the seat belt monitoring system provided by the embodiment of the invention.

Fig. 3 is a schematic circuit board diagram of the indicator light display unit of the seatbelt monitoring system according to the embodiment of the present invention.

Fig. 4 is a circuit board schematic diagram of the voice unit of the seat belt monitoring system provided by the embodiment of the invention.

Fig. 5 is a schematic circuit board diagram of the detection unit of the seat belt monitoring system provided by the embodiment of the invention.

Sensor assembly, labeled 100 in the above figures; 101. a seat belt sensor; 102. a seat sensor; 200. a detection unit; 201. a safety belt optical coupling isolation port; 202. a seat optocoupler isolated port; 203. a first monitoring port; 204. a first control port; 2031. a third monitoring port; 2041. a third control port; 205. a power supply and an expansion port; 2051. outputting voice; 2052. connecting an external power supply; 206. an onboard integrated machine or cloud DTU; 207. a communication module; 208. a cloud server; 209. a client; 300. a reminding unit; 303. a second monitoring port; 304. a second control port; 301. a seat sensor indicator light; 302. a seat belt sensor indicator light; 305. a power indicator light; 306. a seat monitoring indicator light; 307. a seat belt monitoring indicator light; 308. a voice indicator light; 3081. a voice prompt switch; 3082. a volume adjustment potentiometer; 3061. a seat monitoring switch; 3071. a safety belt monitoring switch; 1. a control unit; 11. a voltage control unit; 12. MCU; 13. triggering a data serial port; 14. a communication unit; 15. downloading a program serial port; 16. a clock control unit; 17. a display control unit; 2. an indicator light display unit; 21. an indicator light control unit; 22. a seat sensor indicator light display unit; 23. a seat belt sensor indicator light display unit; 24. a power indicator display unit; 25. a voice indicator light display unit; 26. a seat monitoring indicator light display unit; 27. a safety belt monitoring indicator lamp display unit; 3. a voice unit; 31. a voice control unit; 32. a power amplifier unit; 4. a detection unit; 41. signal data is input into a serial port; 42. a signal data conversion unit; 43. a signal processing unit; 44. a trigger signal is input into a serial port; 45. a power supply communication signal input serial port; 46. and the communication signal output serial port.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present, it is to be understood that the terms "upper", "lower", "left", "right", and the like, if any, refer to an orientation or positional relationship based on that shown in the drawings, that is for convenience in describing and simplifying the description, and that no indication or suggestion that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, is therefore depicted in the drawings by the use of positional relationship descriptive terms only for purposes of illustration and not for purposes of limitation, the particular meaning of such terms being interpreted as broadly as will be understood by those skilled in the art based on the particular circumstances.

The technical solution of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 5, a preferred embodiment of the present invention is shown.

A seat belt monitoring system comprising:

at least one seat, each said seat having a seat number corresponding thereto;

a sensor assembly 100, the sensor assembly 100 including a seat sensor 102 and a seat belt sensor 101 mounted to the seat, the seat sensor 102 for detecting a pressure of a human body, the seat sensor 102 generating a first output signal when a human body is seated on the seat; the seat belt sensor 101 is used for detecting whether the seat belt is fastened or not, and when the seat belt is fastened, the seat belt sensor 101 generates a second output signal;

the detection unit 200 is provided with an optical coupling isolation port, the optical coupling isolation port comprises a seat optical coupling isolation port 202 used for receiving the first output signal and a safety belt optical coupling isolation port 201 used for receiving the second output signal, and the first output signal and the second output signal are converted into a first detection signal and a second detection signal through optical coupling;

the reminding unit 300 is provided with an indicator light, and the reminding unit 300 controls the state change of the indicator light according to the received first detection signal and the second detection signal so as to remind that the seat belt of the seat number is not fastened; and, for the case that the first detection signal is received but the second detection signal is not received, the reminder unit 300 issues a voice alarm to prompt that the seat belt of the seat number is not fastened.

According to the seat belt monitoring system, the seat optical coupling isolation port 202 and the seat belt optical coupling isolation port 201 are arranged, the seat sensor 102 is connected with the seat optical coupling isolation port 202, and the seat belt sensor 101 is connected with the seat belt optical coupling isolation port 201, so that no electric direct connection exists between the seat sensor 102 circuit and the detection unit 200 circuit, and between the seat belt sensor 101 circuit and the detection unit 200 circuit; the sensor assembly 100 sends the first output signal and the second output signal to the detection unit 200, so that the seat only needs to be provided with one seat sensor 102 and one seat belt sensor 101; the reminding unit 300 alarms the seat numbers in a one-to-one correspondence manner through the state change of the corresponding seat number indicator lamps and the corresponding voice broadcast of the seat numbers under the condition that the reminding unit 300 does not receive the second detection signal when receiving the first detection signal.

In this way, by detecting whether the second detection signal is received when the first detection signal is received, whether the seat belt of the seat is buckled or not can be confirmed, and compared with the disclosed technical scheme, the seat belt monitoring system provided by the invention has the following advantages:

(1) because the sensor assembly is connected with the detection unit through the optical coupling isolation port, and no electric direct connection exists between the sensor assembly and the detection unit, on one hand, the potential safety hazard caused by electric connection in a wired connection mode is avoided, and on the other hand, the limitation of the system operation time caused by the use of a battery in a wireless connection mode is avoided;

(2) only one seat sensor and one safety belt sensor are required to be installed on each seat, so that the installation cost is reduced, and the fault point of each seat is reduced to the minimum;

(3) the seat number is displayed through the corresponding seat number indicating lamp and the corresponding seat number voice broadcast mode, one-to-one correspondence alarming is carried out on the seat number, the detection unit can be expanded according to the number of seats, the system can change according to the number of seats of a passenger car, and the flexibility of expanding and using of the system is guaranteed.

As an embodiment of the present invention, the seat sensor 102 is a film pressure sensor, which is flexible and has high sensitivity, the seat sensor 102 is installed below a cushion of the seat, and when a person sits on the seat and the seat sensor 102 senses the weight of the person, the seat sensor 102 generates the first output signal and sends the first output signal to the seat optical coupling isolation port 202; the seat belt sensor 101 is a switch type sensor, the seat belt sensor 101 is installed at a seat belt socket, and when the seat belt is buckled, the seat belt sensor 101 generates the second output signal and sends the second output signal to the seat belt optical coupling isolation port 201.

As an embodiment of the present invention, the detection unit 200 includes a first monitoring port 203, a first control port 204, a seat belt optical coupling isolation port 201, a seat optical coupling isolation port 202, a third monitoring port 2031, a third control port 2041, and a power supply and expansion port 205. The first control port 204 is connected with the second control port 304, and transmits the signal data of the reminding unit 300 to the detection unit 200; the power supply and expansion port 205 is used for connecting an external power supply 2052, a voice output 2051 and external expansion equipment; the seat optical coupling isolation port 202 is connected to the seat sensor 102, and is configured to receive an output signal of the seat sensor 102, that is, the first output signal; the safety belt optical coupling isolation port 201 is connected with the safety belt sensor 101 and is used for receiving an output signal of the safety belt sensor 101, namely the second output signal; the first monitoring port 203 is connected to the second monitoring port 303, and transmits the first detection signal converted from the first output signal and the second detection signal converted from the second output signal to the reminding unit 300.

As an embodiment of the present invention, a schematic diagram of a circuit board of the detection unit 200 is shown in fig. 5, where the detection unit 200 includes a signal data input serial port 41, a signal data conversion unit 42, a signal processing unit 43, a trigger signal input serial port 44, a power communication signal input serial port 45, and a communication signal output serial port 46; the trigger signal input serial port 44 comprises a seat optical coupling isolation port 202 and a safety belt optical coupling isolation port 201, the seat optical coupling isolation port 202 is used for receiving the first output signal, and the safety belt optical coupling isolation port 201 is used for receiving the second output signal; the signal processing unit 43 is configured to perform optical coupling conversion on the first output signal and the second output signal, a main chip is an optical coupling PC817, an electrical signal input by the trigger signal input serial port 44, that is, the first output signal and the second output signal, is first converted into an optical signal through an optical coupling circuit, and then the optical signal is converted into the first detection signal and the second detection signal matched with the voltage of the reminder unit 300, so that the electrical signal input by the trigger signal input serial port 44 is not electrically directly connected with the circuit of the detection unit 200; the power communication signal input serial port 45 is used for connecting an external power supply 2052 and supplying power to the whole system; the communication signal output serial port 46 is used for connecting the voice output 2051 and an external expansion device; in one embodiment, the voice playing signal output by the voice control unit 31 is transmitted to the first control port 204 through the second control port 304, and then output to the voice output 2051 for playing.

As an embodiment of the present invention, the reminding unit 300 includes a control unit 1, an indicator light display unit 2, and a voice unit 3, which are electrically connected, and the control unit 1 sends an alarm signal to the indicator light display unit 2 and the voice unit 3 for a situation that the first detection signal is received but the second detection signal is not received, so that the indicator light display unit 2 sends an alarm prompt by controlling a state change of the seat belt sensor indicator light 302 of the seat number and the voice unit 3 prompts a voice broadcast of the seat number.

As an embodiment of the present invention, the reminder unit 300 further includes a second monitoring port 303, a second control port 304, a seat sensor indicator 301, a seat belt sensor indicator 302, a power indicator 305, a seat monitoring indicator 306, a seat belt monitoring indicator 307, a voice indicator 308, a voice prompt switch 3081, the seat monitoring system comprises a volume adjusting potentiometer 3082, a seat monitoring switch 3061 and a safety belt monitoring switch 3071, wherein a second monitoring port 303 and a second control port 304 are electrically connected with a control unit 1, a seat sensor indicator lamp 301, a safety belt sensor indicator lamp 302, a power source indicator lamp 305, a seat monitoring indicator lamp 306, a safety belt monitoring indicator lamp 307, a voice indicator lamp 308, a seat monitoring switch 3061 and a safety belt monitoring switch 3071 are electrically connected with an indicator lamp display unit 2, and a voice prompt switch 3081 and a volume adjusting potentiometer 3082 are electrically connected with a voice unit 3; the power indicator lamp 305 is used to indicate the operating state of the system; the voice indicating lamp 308 is used for indicating the working state of the voice unit 3; the seat monitoring indicator light 306 is used for indicating the working state of the seat sensor 102; the seat belt monitoring indicator lamp 307 is used for indicating the operating state of the seat belt sensor 101; the voice prompt switch 3081 is used for turning on or turning off the voice alarm prompt; the volume adjustment potentiometer 3082 is used for adjusting the tone of the voice alarm; the seat monitoring switch 3061 is used to turn all seat sensor indicator light 301 displays on or off; the seat belt monitoring switch 3071 is used to turn on or off all of the seat belt sensor indicator lights 302 for display; the seat sensor indicator lamp 301 is used for indicating whether the control unit 1 receives the first detection signal sent by the seat sensor 102 corresponding to the seat sensor indicator lamp 301; the seat belt sensor indicator lamp 302 is used to indicate whether the control unit 1 receives the second detection signal sent by the seat belt sensor 101 corresponding to the seat belt indicator lamp 302.

As an embodiment of the present invention, a schematic diagram of a circuit board of the control unit 1 is shown in fig. 2, where the control unit 1 includes a voltage control unit 11, an MCU12, a trigger data serial port 13, a communication unit 14, a download program serial port 15, a clock control unit 16, and a display control unit 17, which are electrically connected; the voltage control unit 11 adopts a low-dropout voltage regulator MIC29302 to regulate the voltage input to the control unit 1 so as to stabilize the voltage output to the control unit 1; the chip of the MCU12 is STM32F103RB, analyzes and processes the received first detection signal and the second detection signal, and sends out a corresponding control signal to ensure that the function of the whole system is normal; the trigger data serial port 13 is used for sending the voice alarm signal of the MCU12 to the voice unit 3; the communication unit 14 is RS485/232, the chips are MAX232 and 6LB184, and the communication unit is configured to receive the first detection signal and the second detection signal of the first monitoring port 203 and transmit a control signal sent by the MCU12 to the voice unit 3 and the indicator light display unit 2; the download program serial port 15 is used for downloading the edited control program to the MCU 12; the clock control unit 16 chip is NXP8563, which is used for providing a relatively accurate real-time clock and calendar; the display control unit 17 mainly functions to amplify the control signal from the MCU12, and has a chip 74HC 245.

As an embodiment of the present invention, a schematic diagram of a circuit board of the indicator light display unit 2 is shown in fig. 3, and the indicator light display unit 2 includes an indicator light control unit 21, a seat sensor indicator light display unit 22, a seat belt sensor indicator light display unit 23, a power indicator light display unit 24, a voice indicator light display unit 25, a seat monitoring indicator light display unit 26, and a seat belt monitoring indicator light display unit 27, which are electrically connected; the indicator control unit 21 mainly functions to amplify a received control signal sent by the MCU12, and drive the status of the seat sensor indicator lamp 301, the seatbelt sensor indicator lamp 302, the power indicator lamp 305, the voice indicator lamp 308, the seat monitoring indicator lamp 306, and the seatbelt monitoring indicator lamp 307 to change, and the main chips are 74HC245 and BMI 5026; the seat indication lamp display unit 22 includes a seat sensor indication lamp 301 corresponding to each seat; the seat belt indicator light display unit 23 includes a seat belt sensor indicator light 302 corresponding to each seat belt; the power indicator lamp display unit 24 includes a power indicator lamp 305; the voice indicator lamp display unit 25 includes a voice indicator lamp 308; the seat monitoring indicator light display unit 26 includes a seat monitoring indicator light 306; the seatbelt monitoring indicating lamp display unit 27 includes a seatbelt monitoring indicating lamp 307; the seat sensor indicator lamp display unit 22 includes all of the seat sensor indicator lamps 301; the seat belt sensor indicator lamp display unit 23 includes all of the seat belt sensor indicator lamps 302.

As an embodiment of the present invention, a schematic diagram of a circuit board of the voice unit 3 is shown in fig. 4, the voice unit 3 includes a voice control unit 31 and a power amplifier unit 32 which are electrically connected, the voice control unit 31 plays designated voice content according to a received alarm signal, and the main chips include JQ6500, 25L1606E, 8002AIM 1875T; the power amplifier unit 32 mainly amplifies weak signals from a sound source or a preamplifier to push an external loudspeaker to sound, and a main chip is IM 1875T.

As an embodiment of the present invention, in the case where the first detection signal is obtained but the second detection signal is not obtained, it is determined that the passenger has not buckled the seat belt after sitting, and the passenger is reminded to buckle the seat belt by the state changes of the seat sensor indicator lamp 301 and the seat belt sensor indicator lamp 302 corresponding to the seat number and by voice broadcast; for example, if the seat sensor indicator lamp 301 is on to indicate that the first detection signal is obtained and the seat belt sensor indicator lamp 302 is on to indicate that the second detection signal is obtained, and if the first detection signal is obtained but the second detection signal is not obtained, the seat sensor indicator lamp 301 is on and the seat belt sensor indicator lamp 302 is off, it can be confirmed that the passenger with the seat number does not buckle the seat belt; alternatively, the seat sensor indicator 301 is turned off to indicate that the first detection signal is obtained, the seatbelt sensor indicator 302 is turned off to indicate that the second detection signal is obtained, and in the case where the first detection signal is obtained but the second detection signal is not obtained, the seat sensor indicator 301 is turned off and the seatbelt sensor indicator 302 is turned on, so that it can be confirmed that the passenger of the seat number does not fasten a seatbelt.

As an embodiment of the present invention, the detection unit 200 sets a certain interval to scan the seat belt optical coupling isolation port 201 and the seat optical coupling isolation port 202 once, so as to avoid frequent voice alarm caused by the short-time rising of the passenger.

As an embodiment of the present invention, as shown in fig. 1, the external expansion device is an in-vehicle device or cloud DTU206, the in-vehicle device or cloud DTU206 uploads the received data of the detection unit 200 to a cloud server 208 through a communication module 207, the communication module 207 is 2G, 4G, or 5G, the data of the detection unit 200 is stored in the cloud server 208 and can be called by a client 209 connected to the cloud server 208, the number of the clients 209 is not limited, and the client 209 uses the data as the following and is not limited to the following scenario analysis, for example: the method comprises the following steps of vehicle management, seat attendance statistics, passenger flow analysis, seat & safety belt inspection fault reminding, seat & safety belt monitoring reminding, seat & safety belt real-time query, seat & safety belt historical query and the like.

As an embodiment of the present invention, the detection unit 200 further includes a third monitoring port 2031 and a third control port 2041, and when the number of the passenger car seats exceeds the number of the seat sensors and the output signals of the seat belt sensors that can be received by the seat optical coupling isolation port 201 and the seat optical coupling isolation port 202 of the detection unit 200, the third monitoring port 2031 and the third control port 2041 are connected to the monitoring port and the control port of the new detection unit, so that the seat sensors and the seat belt sensors that exceed the number detected by the detection unit 200 are connected to the seat optical coupling isolation port and the seat optical coupling isolation port of the newly added detection unit, and it is not necessary to change the system, so as to implement system expansion and ensure flexibility of system expansion.

As an embodiment of the present invention, the power indicator 305 is fully on to indicate that the system is powered on to enter the working state; the voice indicating lamp 308 is fully on and is used for indicating the voice unit 3 to enter a working state; the seat monitoring indicator light 306 is fully on to indicate that the seat sensor 102 is in an operating state; the seat belt monitoring indicator lamp 307 is fully on to indicate that the seat belt sensor 101 enters an operating state; when no passenger gets on the vehicle, all the seat sensor indicator lamps 301 and the seat belt sensor indicator lamps 302 are turned off at the moment, which indicates that the first detection signal and the second detection signal are not received, when the first detection signal is received and the second detection signal is not received, the corresponding seat sensor indicator lamps 301 are turned on, and meanwhile, the seat belt which broadcasts the seat number in a voice mode is not buckled, so that the passenger is prompted to be buckled; or when no passenger gets on the vehicle, all the seat sensor indicator lamps 301 and the seat belt sensor indicator lamps 302 are fully turned on at the moment to indicate that the first detection signal and the second detection signal are not received, when the first detection signal is received and the second detection signal is not received, the corresponding seat sensor indicator lamps 301 are turned off, and meanwhile, the seat belt which broadcasts the seat number in a voice mode is not buckled to prompt the passenger to be buckled; if the driver considers that the voice broadcast sound is too high or low, the volume of the voice broadcast can be adjusted by the volume adjustment potentiometer 3082, and if the driver considers that the voice broadcast causes interference, the voice prompt switch 3081 can be turned off to turn off the voice broadcast.

As an embodiment of the present invention, the seat monitoring indicator lamp 306, the seatbelt monitoring indicator lamp 307, the seat monitoring switch 3061, and the seatbelt monitoring switch 3071 may also be used as a fault detection for the seat sensor 102 and the seatbelt sensor 101. When the seat sensors 102 are subjected to fault detection, the seat monitoring switch 3061 is opened, the safety belt monitoring switch 3071 is closed, the seat monitoring indicator lamps 306 are turned on, the safety belt monitoring indicator lamps 307 are turned off, the fault detection state of the seat sensors 102 is indicated, then whether each seat sensor 102 is normal or not is tested in sequence, if the condition that the first detection signal is not received is indicated by the fact that the seat sensor indicator lamps 301 are turned on or off completely, when the first detection signal is received, the corresponding seat sensor indicator lamps 301 are turned off or turned on, the seat sensors 102 indicating the seat numbers work normally, and if the condition that the seat sensors 102 indicating the seat numbers are in fault needs to be further detected; when fault detection is carried out on the seat belt sensors 101, the seat belt monitoring switch 3071 is turned on, the seat monitoring switch 3061 is turned off, the seat belt monitoring indicator lamps 307 are turned on, the seat monitoring indicator lamps 306 are turned off, the fault detection state of the seat belt sensors 101 is indicated, then whether each seat belt sensor 101 is normal or not is tested in sequence, if the seat belt sensor indicator lamps 302 are turned on or off completely to indicate that the second detection signal is not received, when the second detection signal is received, the corresponding seat belt sensor indicator lamps 302 are turned off or turned on, the seat belt sensors 101 indicating the seat numbers work normally, and if not, the seat belt sensors 101 indicating the seat numbers are in fault and need to be further detected; thus, the failure checking efficiency of the seat sensor and the seatbelt sensor is greatly improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A seat belt monitoring system, comprising:

at least one seat, each said seat having a seat number corresponding thereto;

a sensor assembly including a seat sensor and a seat belt sensor mounted to the seat, the seat sensor for detecting a pressure of a human body, the seat sensor generating a first output signal when a human is seated on the seat; the safety belt sensor is used for detecting whether a safety belt is fastened or not, and when the safety belt is fastened, the safety belt sensor generates a second output signal;

the detection unit is provided with an optical coupling isolation port, the optical coupling isolation port comprises a seat optical coupling isolation port for receiving the first output signal and a safety belt optical coupling isolation port for receiving the second output signal, and the first output signal and the second output signal are converted into a first detection signal and a second detection signal through an optical coupling;

the reminding unit is provided with an indicator light, and controls the state change of the indicator light according to the received first detection signal and the second detection signal so as to prompt that the seat number of the safety belt is not fastened; and for the condition that the first detection signal is received but the second detection signal is not received, the reminding unit sends out a voice alarm to remind that the safety belt of the seat number is not fastened.

2. The seat belt monitoring system according to claim 1, wherein the reminder unit includes a control unit, an indicator light display unit, and a voice unit that are electrically connected; the control unit sends corresponding control signals to the indicator light display unit according to the received first detection signal and the second detection signal so as to change the state of the indicator light, and thus a driver or a passenger without a safety belt is prompted through the change of the state of the indicator light; and the control unit sends an alarm signal to the voice unit under the condition that the first detection signal is received but the second detection signal is not received, so that the voice unit broadcasts voice alarm content through an external voice output device.

3. The seat belt monitoring system according to claim 2, wherein the control unit comprises a voltage control unit (11), an MCU (12), a trigger data serial port (13), a communication unit (14), a download program serial port (15), a clock control unit (16) and a display control unit (17) which are electrically connected; the voltage control unit (11) is used for adjusting the voltage input into the control unit so as to stabilize the voltage output to the control unit; the MCU (12) analyzes and processes the received first detection signal and the second detection signal and sends out corresponding control signals; the trigger data serial port (13) is used for sending a voice alarm signal sent by the MCU (12) to the voice unit; the communication unit (14) is used for receiving the first detection signal and the second detection signal and transmitting a control signal sent by the MCU (12) to the voice unit and the indicator light display unit; the download program serial port (15) is used for downloading the edited control program to the MCU (12); the clock control unit (16) is used for providing a relatively accurate real-time clock and calendar; the display control unit (17) is used for amplifying the control signal sent by the MCU (12).

4. The seatbelt monitoring system according to claim 2 or 3, wherein the indicator light display unit includes an indicator light control unit (21), a seat sensor indicator light display unit (22), a seatbelt sensor indicator light display unit (23), a power indicator light display unit (24), a voice indicator light display unit (25), a seat monitoring indicator light display unit (26), and a seatbelt monitoring indicator light display unit (27) which are electrically connected; the indicating lamp control unit is used for amplifying the received control signal sent by the MCU (12) and driving indicating lamps arranged on the seat sensor indicating lamp display unit (22), the safety belt sensor indicating lamp display unit (23), the power supply indicating lamp display unit (24), the voice indicating lamp display unit (25), the seat monitoring indicating lamp display unit (26) and the safety belt monitoring indicating lamp display unit (27) to change in state; the seat sensor indicator lamp display unit (22) comprises a seat sensor indicator lamp for indicating whether the control unit receives the first detection signal sent by the seat sensor corresponding to the seat sensor indicator lamp; the safety belt sensor indicator lamp display unit (23) comprises a safety belt sensor indicator lamp for indicating whether the control unit receives the second detection signal sent by the safety belt sensor corresponding to the safety belt sensor indicator lamp; the power indicator lamp display unit (24) comprises a power indicator lamp for indicating the working state of the system; the voice indicator lamp display unit (25) comprises a voice indicator lamp which is used for indicating the working state of the voice unit; the seat monitoring indicator lamp display unit (26) comprises a seat monitoring indicator lamp for indicating the working state of the seat sensor; the safety belt monitoring indicator lamp display unit (27) comprises a safety belt monitoring indicator lamp which is used for indicating the working state of the safety belt sensor.

5. The seat belt monitoring system according to claim 2, wherein the voice unit comprises a voice control unit (31) and a power amplification unit (32) which are electrically connected, the voice control unit (31) plays specified voice content according to the received alarm signal, and the power amplification unit (32) pushes an external speaker to sound.

6. The seat belt monitoring system according to claim 1, wherein the detection unit comprises a signal processing unit (43), a trigger signal input serial port (44), a power communication signal input serial port (45), and a communication signal output serial port (46); trigger signal input serial ports (44) do the opto-coupler isolation port is used for receiving first output signal with second output signal, signal processing unit (43) are used for right first output signal with second output signal carries out the opto-coupler conversion, so that first output signal with second output signal pass through the opto-coupler convert into with first detected signal with the second detected signal, power communication signal input serial ports (45) are used for connecting external power supply, communication signal output serial ports (46) are used for connecting speech output and external extension equipment.

7. The seat belt monitoring system according to claim 1 or 2, wherein the detection unit further comprises a first monitoring port and a first control port, the reminder unit further comprises a second monitoring port and a second control port; the first monitoring port is connected with the second monitoring port so that the first detection signal and the second detection signal are transmitted to the control unit; the first control port and the second control port are connected so that signal data of the control unit can be transmitted to the detection unit.

8. The seatbelt monitoring system according to claim 7, wherein the external extension device is an in-vehicle unit or a cloud DTU, the in-vehicle unit or the cloud DTU is connected with a cloud server through a communication module, the signal data received by the first control port is forwarded to the cloud server, and the cloud server stores the signal data for a client call connected with the cloud server.

9. The seat belt monitoring system of claim 1, wherein the seat sensor is a membrane pressure sensor mounted below a cushion of the seat, the seat sensor generating the first output signal when the seat sensor senses the weight of a human body; the safety belt sensor is a switch type sensor, the safety belt sensor is installed at a safety belt socket, and when the safety belt is buckled, the safety belt sensor generates a second output signal.

10. The seatbelt monitoring system according to claim 6, wherein the detection unit further includes a third monitoring port and a third control port for expansion of the detection unit such that the detection unit is expandable as the number of seatbelts increases.

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