CN112849071A - Seat belt monitoring method and seat belt sensor fault detection method - Google Patents
Seat belt monitoring method and seat belt sensor fault detection method Download PDFInfo
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- CN112849071A CN112849071A CN201911176592.1A CN201911176592A CN112849071A CN 112849071 A CN112849071 A CN 112849071A CN 201911176592 A CN201911176592 A CN 201911176592A CN 112849071 A CN112849071 A CN 112849071A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/48—Control systems, alarms, or interlock systems, for the correct application of the belt or harness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/48—Control systems, alarms, or interlock systems, for the correct application of the belt or harness
- B60R2022/4808—Sensing means arrangements therefor
- B60R2022/4816—Sensing means arrangements therefor for sensing locking of buckle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/48—Control systems, alarms, or interlock systems, for the correct application of the belt or harness
- B60R2022/4808—Sensing means arrangements therefor
- B60R2022/4858—Sensing means arrangements therefor for sensing pressure on seat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/48—Control systems, alarms, or interlock systems, for the correct application of the belt or harness
- B60R2022/4866—Displaying or indicating arrangements thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/48—Control systems, alarms, or interlock systems, for the correct application of the belt or harness
- B60R2022/4883—Interlock systems
- B60R2022/4891—Interlock systems preventing use of the vehicle when the seatbelt is not fastened
Abstract
A seat belt monitoring method uses a seat belt monitoring system to monitor a seat belt, a seat sensor and a seat belt sensor arranged on the seat detect the seating condition of each seat person, and a driver is reminded of accurately finding the seat without the seat belt through the state change of a seat sensor indicator light and a seat belt sensor indicator light, so that the judgment rate is not influenced by external factors, and the condition of misjudgment is avoided; the method for detecting the faults of the seat belt sensor comprises the steps of using a seat belt monitoring system to detect the faults of the seat belt sensor, achieving fault detection on the seat belt sensor through a seat belt sensor indicating lamp, and achieving fault detection on the seat belt sensor through a seat belt sensor indicating lamp.
Description
Technical Field
The invention relates to the technical field of detection of safety belts, in particular to a safety belt monitoring method and a safety belt sensor fault detection method.
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. CN110040106A discloses a seat belt monitoring method and system for a passenger car, comprising the steps of: s01: numbering seats and corresponding safety belts in a passenger car, wherein the seat numbers are consistent with the corresponding safety belt numbers; arranging a certain number of image acquisition devices at the top of the carriage to acquire images of the seat area; s02: detecting whether a safety belt of a seat is fastened or not through a sensor, and sending safety belt information and a corresponding seat number to a matching judgment module; s03: processing the acquired seat area image, identifying a head target in the image through a target identification algorithm, and judging personnel information on the seat; s04: and matching the personnel information with the safety belt information and the corresponding seat numbers, and judging whether a passenger is on each seat or not and whether the safety belt is fastened or not in real time. The step S03 includes: s31: numbering the collected multiple seat area images according to the number of the image collection device; s32: dividing each seat area according to the determined seat arrangement data, and determining the seat number corresponding to each image area; s33: and identifying the head target in each image area through a target identification algorithm, and judging the personnel information on the seat.
The defect of the solution is that the information of personnel on the seat needs to be identified and judged through an image acquisition device, a camera needs to be installed on every 3-4 rows of seats, a head target is judged according to the image, the judgment accuracy rate is very easily influenced by external factors such as the pixel quality of the camera, the light intensity, the standing of the personnel and the like, and the failure detection cannot be carried out on equipment for acquiring the information of the personnel and equipment for detecting whether a safety belt is fastened, so the judgment accuracy rate is difficult to guarantee.
Disclosure of Invention
The invention aims to provide a seat belt monitoring method and a seat sensor fault detection method, and aims to overcome the defect that the judgment accuracy of the disclosed solution is influenced by external factors and equipment faults.
The invention is realized in the following way, and adopts the technical scheme that:
a seat belt monitoring method for seat belt monitoring using a seat belt monitoring system, the seat belt monitoring system comprising:
at least one seat, each said seat having a seat number corresponding thereto;
a seat sensor and a seat belt sensor mounted to the seat, the seat sensor for detecting a human body pressure, the seat sensor generating a seat sensor 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 safety belt sensor signal;
a detection unit for receiving the seat sensor signal and the seatbelt sensor signal and sending the processed seat sensor signal and seatbelt sensor signal to a control unit;
the control unit is used for receiving the seat sensor signal and the safety belt sensor signal sent by the detection unit and sending an indicator light control signal to an indicator light display unit; judging according to the signal state of the seat sensor and the signal state of the safety belt sensor, and if the safety belt of the seat is not fastened, sending an alarm signal to a voice unit;
the seat sensor indicating lamp is electrically connected with the indicating lamp unit and used for displaying a seat sensor signal, the safety belt sensor indicating lamp is used for displaying a safety belt sensor signal, the seat monitoring indicating lamp is used for indicating the working state of the seat sensor, the safety belt monitoring indicating lamp is used for indicating the working state of the safety belt sensor, and the voice indicating lamp is used for indicating the working state of the voice unit;
the seat monitoring switch is electrically connected with the control unit and used for starting the seat monitoring switch for receiving the seat sensor signal, the safety belt monitoring switch for receiving the safety belt sensor signal and the voice prompt switch for playing voice prompt;
the volume adjusting potentiometer is connected with the voice unit and is used for adjusting the volume of the voice prompt;
the seat belt monitoring method comprises the following steps:
s1: turning on the seat monitoring switch, the safety belt monitoring switch and the voice prompt switch, wherein the seat monitoring indicator lamp, the safety belt monitoring indicator lamp and the voice indicator lamp are turned on to indicate that the seat sensor, the safety belt sensor and the voice unit enter a working state;
s2: when the seat is occupied, the seat sensor generates a seat sensor signal and sends the seat sensor signal to the detection unit;
s3: when a seat belt is buckled, the seat belt sensor generates the seat belt sensor signal and sends the seat belt sensor signal to the detection unit;
s4: the detection unit sends the acquired and processed seat sensor signal and the acquired and processed safety belt sensor signal to the control unit;
s5: when the control unit receives the seat sensor signal, the state of the seat sensor indicator lamp changes;
s6: when the control unit receives the seat belt sensor signal, the state of the seat belt sensor indicator lamp changes;
s7: when the seat sensor indicator light changes and the state of the safety belt sensor indicator light does not change, the driver or the crew member is reminded that the passenger of the seat number is not fastened with a safety belt;
s8: the control unit sends an alarm signal to the voice unit when the control unit receives the seat sensor signal but does not receive the safety belt sensor signal, and the voice unit sends a voice prompt to prompt a passenger with the seat number to wear a safety belt.
Further, the step S8 further includes the following steps:
s81: when the volume of the voice prompt is too large or too small, the driver or the crew member adjusts the volume of the voice prompt through the volume adjusting potentiometer;
s82: when the voice prompt causes interference, the driver or the crew member turns off the voice prompt switch to stop the voice prompt.
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 a seat sensor signal when sensing 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 safety belt sensor signal.
Furthermore, the detection unit comprises a signal processing unit and a trigger signal input serial port; the trigger signal input serial port is used for receiving the seat sensor signal and the safety belt sensor signal, and the signal processing unit is used for processing the seat sensor signal and the safety belt sensor signal and sending the seat sensor signal and the safety belt sensor signal to the control unit.
Furthermore, the control unit is electrically connected with the indicator light display unit, and the indicator light display unit receives an indicator light control signal sent by the control unit, so that the states of the seat sensor indicator light, the safety belt sensor indicator light, the seat monitoring indicator light and the safety belt monitoring indicator light are changed.
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.
The invention also discloses a method for detecting the faults of the seat belt sensor, which uses a seat belt monitoring system to detect the faults of the seat belt sensor, wherein the seat belt monitoring system comprises:
at least one seat, each said seat having a seat number corresponding thereto;
a seat sensor and a seat belt sensor mounted to the seat, the seat sensor for detecting a human body pressure, the seat sensor generating a seat sensor 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 safety belt sensor signal;
a detection unit for receiving the seat sensor signal and the seatbelt sensor signal and sending the processed seat sensor signal and seatbelt sensor signal to a control unit;
the control unit is used for receiving the seat sensor signal and the safety belt sensor signal sent by the detection unit and sending an indicator light control signal to an indicator light display unit; judging according to the signal state of the seat sensor and the signal state of the safety belt sensor, and if the safety belt of the seat is not fastened, sending an alarm signal to a voice unit;
the seat sensor indicating lamp is electrically connected with the indicating lamp unit and used for displaying a seat sensor signal, the safety belt sensor indicating lamp is used for displaying a safety belt sensor signal, the seat monitoring indicating lamp is used for indicating the working state of the seat sensor, the safety belt monitoring indicating lamp is used for indicating the working state of the safety belt sensor, and the voice indicating lamp is used for indicating the working state of the voice unit;
the seat monitoring switch is electrically connected with the control unit and used for starting the seat monitoring switch for receiving the seat sensor signal, the safety belt monitoring switch for receiving the safety belt sensor signal and the voice prompt switch for playing voice prompt;
the seat belt sensor fault detection method comprises the following steps:
s101: turning on the seat monitoring switch and turning off the safety belt monitoring switch to enable the seat sensor to enter a working state;
s102: the seat monitoring indicator light is on to indicate that a fault detection program of the seat sensor is entered;
s103: when the seat is not occupied, the state of the seat sensor indicator lamp is not changed, and the seat sensor signal is not received;
s104: an inspector sitting on the seat to cause the seat sensor to emit the seat sensor signal;
s105: if the state of the seat sensor indicator light changes, the seat sensor is indicated to work normally; if the state of the seat sensor indicator lamp is not changed, the seat sensor is in failure and needs to be repaired or replaced;
s106: closing the seat monitoring switch and opening the safety belt monitoring switch to enable the safety belt sensor to enter a working state;
s107: the safety belt monitoring indicator lamp is turned on to indicate that a fault detection program of the safety belt sensor is entered;
s108: when the safety belt is not buckled, the state of the safety belt sensor indicator lamp is not changed, and the safety belt sensor signal is not received;
s109: the inspector clasping a seat belt to cause the seat belt sensor to emit the seat belt sensor signal;
s110: if the state of the safety belt sensor indicator lamp changes, the safety belt sensor works normally; if the state of the safety belt sensor indicator lamp is not changed, the safety belt sensor is in failure and needs to be repaired or replaced.
Further, the step S101 further includes the following steps:
s100: and closing the voice prompt switch.
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 a seat sensor signal when sensing 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 safety belt sensor signal.
Furthermore, the control unit is electrically connected with the indicator light display unit, and the indicator light display unit receives an indicator light control signal sent by the control unit, so that the states of the seat sensor indicator light, the safety belt sensor indicator light, the seat monitoring indicator light and the safety belt monitoring indicator light are changed.
Compared with the prior art, the invention has the following advantages:
1) the seat sensor and the safety belt sensor arranged on the seat detect the sitting condition of each seat person, and the state change of the seat sensor indicator lamp and the safety belt sensor indicator lamp reminds a driver to accurately find the seat without the safety belt, so that the judgment rate is not influenced by external factors, and the condition of misjudgment is avoided;
2) the seat sensor indicator lamp realizes fault detection on the seat sensor;
3) the safety belt sensor fault detection is realized through the safety belt sensor indicator lamp.
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 flowchart of a seat belt monitoring method according to an embodiment of the present invention.
Fig. 2 is a flowchart of a seat belt monitoring method according to an embodiment of the present invention, including the step S81 and the step S82.
Fig. 3 is a flowchart of a seat belt sensor fault detection method provided by an embodiment of the present invention.
Fig. 4 is a block diagram of a seatbelt monitoring system used in a seatbelt monitoring method and a seatbelt sensor failure detection method according to an embodiment of the present invention.
Fig. 5 is a schematic circuit board diagram of the control unit of the seatbelt monitoring system used in the seatbelt monitoring method and the seatbelt sensor failure detection method according to the embodiment of the present invention.
Fig. 6 is a schematic circuit board diagram of the indicator light display unit of the seatbelt monitoring system used in the seatbelt monitoring method and the seatbelt sensor failure detection method according to the embodiment of the present invention.
Fig. 7 is a circuit board schematic diagram of the voice unit of the seatbelt monitoring system used in the seatbelt monitoring method and the seatbelt sensor failure detection method according to the embodiment of the present invention.
Fig. 8 is a schematic circuit board diagram of the detection unit of the seatbelt monitoring system used in the seatbelt monitoring method and the seatbelt sensor failure detection method according to the embodiment of the present 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; 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.
A seat belt monitoring system, as shown in fig. 4 to 8, includes:
a sensor assembly 100, the sensor assembly 100 comprising a seat sensor 102 and a seat belt sensor 101 mounted to the seat, the seat sensor 102 for detecting a human body pressure, the seat sensor 102 generating a seat sensor 102 signal when a human is seated on the seat; the seat belt sensor 101 is used for detecting whether a seat belt is fastened or not, and when the seat belt is fastened, the seat belt sensor 101 generates a seat belt sensor 101 signal;
the detection unit 200 is provided with a seat optical coupling isolation port 202 for receiving a seat sensor 102 signal and a safety belt optical coupling isolation port 201 for receiving a safety belt sensor 101 signal, and the processed seat sensor 102 signal and safety belt sensor 101 signal are sent to the reminding unit 300;
the reminding unit 300 comprises a control unit 1, an indicator light display unit 2 and a voice unit 3 which are electrically connected, wherein the control unit 1 sends an alarm signal to the indicator light display unit 2 and the voice unit 3 under the condition that the seat sensor 102 signal is received but the seat belt sensor signal is not received, so that the indicator light display unit 2 controls the state change of a seat belt sensor indicator light 302 of the seat number, and the voice unit 3 sends an alarm prompt through prompting the seat number voice broadcast.
As an embodiment of the present invention, the seat sensor 102 is a thin film pressure sensor, which is flexible and has high sensitivity, the seat sensor 102 is installed below a cushion of the seat, when a person sits on the seat and the seat sensor 102 senses the weight of the person, the seat sensor 102 generates a seat sensor 102 signal and sends the seat sensor 102 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 a seat belt sensor 101 signal and sends the seat belt sensor 101 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 with the seat sensor 102 and is used for receiving an output signal of the seat sensor 102, namely a seat sensor 102 signal; the safety belt optical coupling isolation port 201 is connected with the safety belt sensor 101 and used for receiving an output signal of the safety belt sensor 101, namely a safety belt sensor 101 signal; the first monitoring port 203 is connected to the second monitoring port 303 and transmits the processed signals of the seat sensor 102 and the seat belt sensor 101 to the reminder 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. 8, 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, wherein the seat optical coupling isolation port 202 is used for receiving a seat sensor 102 signal, and the safety belt optical coupling isolation port 201 is used for receiving a safety belt sensor 101 signal; the signal processing unit 43 is used for performing optical coupling conversion on the seat sensor 102 signal and the seat belt sensor 101 signal, the main chip is an optical coupling PC817, the electrical signals input by the trigger signal input serial port 44, namely the seat sensor 102 signal and the seat belt sensor 101 signal, are firstly converted into optical signals through an optical coupling circuit, and then the optical signals are converted into the seat sensor 102 signal and the seat belt sensor 101 signal which are matched with the voltage of the reminding unit 300, so that the electrical signals input by the trigger signal input serial port 44 are not directly connected with the detection unit 200 circuit electrically; 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 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 lamp 306 is used for indicating the working state of all the seat sensors 102; the seatbelt monitoring indicator lamp 307 is used to indicate the operating states of all the seatbelt sensors 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 a seat sensor 102 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 a seat belt sensor 101 signal from 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. 5, 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 seat sensor 102 signal and safety belt sensor 101 signal, and sends out corresponding control signals 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 seat sensor 102 signal and the seatbelt sensor 101 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. 6, 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 light control unit 21 mainly functions to amplify a received control signal sent by the MCU12, and drive the status of the seat sensor indicator light 301, the seat belt sensor indicator light 302, the power indicator light 305, the voice indicator light 308, the seat monitoring indicator light 306, and the seat belt monitoring indicator light 307 to change, wherein the main chips are 74HC245 and BMI5026, 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. 7, 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 signal of the seat sensor 102 is obtained but the signal of the seat belt sensor 101 is not obtained, it is determined that the passenger has not fastened the seat belt after sitting, so that the passenger is reminded to fasten the seat belt by the state changes of the seat sensor indicator 301 and the seat belt sensor indicator 302 corresponding to the seat number and by voice broadcast; for example, the seat sensor indicator lamp 301 is on to indicate that the seat sensor 102 signal is obtained, the seat belt sensor indicator lamp 302 is on to indicate that the seat belt sensor 101 signal is obtained, and in the case that the seat sensor 102 signal is obtained but the seat belt sensor 101 signal is not obtained, the seat sensor indicator lamp 301 is on and the seat belt sensor indicator lamp 302 is off, so that it can be confirmed that the passenger with the seat number does not buckle the seat belt; alternatively, the seat sensor indicator lamp 301 is turned off to indicate that the seat sensor 102 signal is obtained, the seatbelt sensor indicator lamp 302 is turned off to indicate that the seatbelt sensor 101 signal is obtained, and in the case where the seatbelt sensor 101 signal is not obtained but the seat sensor 102 signal is obtained, the seat sensor indicator lamp 301 is turned off and the seatbelt sensor indicator lamp 302 is turned on, so that it can be confirmed that the passenger of the seat number does not fasten the 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. 4, 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.
In this embodiment, the power indicator 305 is fully on to indicate that the system is powered on to enter a 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 safety belt sensor indicator lamps 302 are completely turned off at the moment, which indicates that no seat sensor 102 signal and no safety belt sensor 101 signal are received, when the seat sensor 102 signal is received and no safety belt sensor 101 signal is received, the corresponding seat sensor indicator lamps 301 are turned on, and meanwhile, the safety 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, which indicates that no seat sensor 102 signal and no seat belt sensor 101 signal are received, when the seat sensor 102 signal is received and no seat belt sensor 101 signal is received, the corresponding seat sensor indicator lamps 301 are turned off, and meanwhile, the seat belt with the seat number broadcasted in a voice mode is not buckled, so that the passenger is prompted 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.
In this embodiment, the seat monitoring indicator lamp 306, the seatbelt monitoring indicator lamp 307, the seat monitoring switch 3061, and the seatbelt monitoring switch 3071 can also be used as 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 seat sensor indicator lamps 301 are turned on or off completely to indicate that the signal of the seat sensors 102 is not received, when the signal of the seat sensors 102 is received, the corresponding seat sensor indicator lamps 301 are turned off or turned on, the seat sensors 102 with the seat numbers work normally, and if the fault of the seat sensors 102 with the seat numbers is not detected, further detection is needed; 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 seat belt sensor signal is not received, when the seat belt sensor 101 signal is received, the corresponding seat belt sensor indicator lamps 302 are turned off or turned on, the seat belt sensor 101 of the seat number works normally, otherwise, the seat belt sensor 101 of the seat number is in fault and needs to be further detected; thus, the failure checking efficiency of the seat sensor and the seatbelt sensor is greatly improved.
The invention provides a seat belt monitoring method, which is implemented by using the seat belt monitoring system, and as shown in fig. 1, the seat belt monitoring method comprises the following steps:
s1: the seat monitoring switch 3061, the safety belt monitoring switch 3071 and the voice prompt switch 3081 are turned on, and the seat monitoring indicator lamp 306, the safety belt monitoring indicator lamp 307 and the voice indicator lamp 308 are turned on to show that the seat sensor 102, the safety belt sensor 101 and the voice unit 3 enter the working state;
s2: when the seat is occupied by a person, the seat sensor 102 generates a seat sensor 102 signal and sends the seat sensor 102 signal to the detection unit 200;
s3: when the seat belt is buckled, the seat belt sensor 101 generates a seat belt sensor 101 signal and transmits the signal to the detection unit 200;
s4: the detection unit 200 sends the acquired and processed seat sensor 102 signal and seat belt sensor 101 signal to the control unit 1;
s5: when the control unit 1 receives the signal of the seat sensor 102, the state of the seat sensor indicator lamp 301 changes;
s6: when the control unit 1 receives the signal of the seat belt sensor 101, the state of the seat belt sensor indicator lamp 302 changes;
s7: when the seat sensor indicator lamp 301 changes and the state of the seat belt sensor indicator lamp 302 does not change, the driver or the crew member is informed that the passenger with the seat number is not wearing the seat belt;
s8: in the case where the control unit 1 receives the signal of the seat sensor 102 but does not receive the signal of the seat belt sensor 101, the control unit 1 sends an alarm signal to the voice unit 3, and the voice unit 3 sends a voice prompt that the passenger of the seat number gets on the seat belt.
According to the seat belt monitoring method, the seat sensor 102 and the seat belt sensor 101 arranged on the seat detect the seating condition of each seat person, the state change of the seat sensor indicator lamp 301 and the seat belt sensor indicator lamp 302 is used for reminding a driver of accurately finding the seat without a seat belt, the judgment rate is not influenced by external factors, and the condition of misjudgment is avoided.
In one embodiment, the following steps are added after the step S8, as shown in fig. 2:
s81: when the volume of the voice prompt is too large or too small, the driver or the crew member adjusts the volume of the voice prompt through the volume adjusting potentiometer 3082;
s82: when the voice guidance causes interference, the driver or the crew member turns off the voice guidance switch 3081 to stop the voice guidance.
The steps S81 and S82 have the advantages that the influence caused by the volume of the voice prompt is avoided; for example: when important news needs to be played, the driver or the crew member turns down the volume through the step S81 or turns off the voice prompt through the step S82; when the voice prompt volume is too small to attract the attention of the unbelted passenger, the driver or the crew member turns the volume up to attract the attention of the unbelted passenger through the step S81.
The invention also provides a method for detecting the fault of the seat belt sensor, which is implemented by using the seat belt monitoring system, and as shown in fig. 3, the method for monitoring the seat belt comprises the following steps:
s101: the seat monitoring switch 3061 is turned on and the seat belt monitoring switch 3071 is turned off to put the seat sensor 102 into an operative state;
s102: the seat monitoring indicator light 306 lights indicating entry into the fault detection routine of the seat sensor 102;
s103: when the seat is not occupied, the state of the seat sensor indicator lamp 301 is not changed, which indicates that no seat sensor 102 signal is received;
s104: an inspector sits on the seat to cause the seat sensor 102 to signal the seat sensor 102;
s105: if the state of the seat sensor indicator lamp 301 changes, the seat sensor 102 is indicated to work normally; if the state of the seat sensor indicator lamp 301 is not changed, the seat sensor 102 is in failure and needs to be repaired or replaced;
s106: the seat monitoring switch 3061 is closed and the seat belt monitoring switch 3071 is opened to bring the seat belt sensor 101 into an operative state;
s107: the seatbelt monitoring indicator lamp 307 is on, indicating that a failure detection process of the seatbelt sensor 101 is entered;
s108: when the seat belt is not buckled, the state of the seat belt sensor indicator lamp 302 is not changed, which indicates that the signal of the seat belt sensor 101 is not received;
s109: the inspector clasps the seat belt to cause the seat belt sensor 101 to signal the seat belt sensor 101;
s110: if the state of the seat belt sensor indicator light 302 changes, it indicates that the seat belt sensor 101 is working normally; if the status of the seatbelt sensor indicator light 302 does not change, it indicates that the seatbelt sensor 101 is malfunctioning and needs to be repaired or replaced.
According to the seat belt fault detection method, fault detection of the seat sensor is achieved through the seat sensor indicating lamp, and fault detection of the seat belt sensor is achieved through the seat belt sensor indicating lamp.
In one embodiment, the step S101 is preceded by the following steps:
s100: voice prompt switch 3081 is closed.
The step S100 is added, so that the voice prompt switch is turned off, and the condition that the safety belt is not fastened is prevented from being sent out by voice prompt when the fault detection of the seat sensor and the fault detection of the safety belt are carried out, so that the interference on the fault detection of inspectors is avoided.
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 method, characterized in that seat belt monitoring is performed using a seat belt monitoring system, the seat belt monitoring system comprising:
at least one seat, each said seat having a seat number corresponding thereto;
a seat sensor and a seat belt sensor mounted to the seat, the seat sensor for detecting a human body pressure, the seat sensor generating a seat sensor 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 safety belt sensor signal;
a detection unit for receiving the seat sensor signal and the seatbelt sensor signal and sending the processed seat sensor signal and seatbelt sensor signal to a control unit;
the control unit is used for receiving the seat sensor signal and the safety belt sensor signal sent by the detection unit and sending an indicator light control signal to an indicator light display unit; judging according to the signal state of the seat sensor and the signal state of the safety belt sensor, and if the safety belt of the seat is not fastened, sending an alarm signal to a voice unit;
the seat sensor indicating lamp is electrically connected with the indicating lamp unit and used for displaying a seat sensor signal, the safety belt sensor indicating lamp is used for displaying a safety belt sensor signal, the seat monitoring indicating lamp is used for indicating the working state of the seat sensor, the safety belt monitoring indicating lamp is used for indicating the working state of the safety belt sensor, and the voice indicating lamp is used for indicating the working state of the voice unit;
the seat monitoring switch is electrically connected with the control unit and used for starting the seat monitoring switch for receiving the seat sensor signal, the safety belt monitoring switch for receiving the safety belt sensor signal and the voice prompt switch for playing voice prompt;
the volume adjusting potentiometer is connected with the voice unit and is used for adjusting the volume of the voice prompt;
the seat belt monitoring method comprises the following steps:
s1: turning on the seat monitoring switch, the safety belt monitoring switch and the voice prompt switch, wherein the seat monitoring indicator lamp, the safety belt monitoring indicator lamp and the voice indicator lamp are turned on to indicate that the seat sensor, the safety belt sensor and the voice unit enter a working state;
s2: when the seat is occupied, the seat sensor generates a seat sensor signal and sends the seat sensor signal to the detection unit;
s3: when a seat belt is buckled, the seat belt sensor generates the seat belt sensor signal and sends the seat belt sensor signal to the detection unit;
s4: the detection unit sends the acquired and processed seat sensor signal and the acquired and processed safety belt sensor signal to the control unit;
s5: when the control unit receives the seat sensor signal, the state of the seat sensor indicator lamp changes;
s6: when the control unit receives the seat belt sensor signal, the state of the seat belt sensor indicator lamp changes;
s7: when the seat sensor indicator light changes and the state of the safety belt sensor indicator light does not change, the driver or the crew member is reminded that the passenger of the seat number is not fastened with a safety belt;
s8: the control unit sends an alarm signal to the voice unit when the control unit receives the seat sensor signal but does not receive the safety belt sensor signal, and the voice unit sends a voice prompt to prompt a passenger with the seat number to wear a safety belt.
2. The seat belt monitoring method according to claim 1, wherein the step S8 is further followed by the step of:
s81: when the volume of the voice prompt is too large or too small, the driver or the crew member adjusts the volume of the voice prompt through the volume adjusting potentiometer;
s82: when the voice prompt causes interference, the driver or the crew member turns off the voice prompt switch to stop the voice prompt.
3. The seat belt monitoring method according to claim 1, wherein the seat sensor is a film pressure sensor, the seat sensor is installed below a cushion of the seat, and the seat sensor signal is generated 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 safety belt sensor signal.
4. The seat belt monitoring method according to claim 1, wherein the detection unit includes a signal processing unit and a trigger signal input serial port; the trigger signal input serial port is used for receiving the seat sensor signal and the safety belt sensor signal, and the signal processing unit is used for processing the seat sensor signal and the safety belt sensor signal and sending the seat sensor signal and the safety belt sensor signal to the control unit.
5. The method for monitoring the seat belt according to claim 1, wherein the control unit is electrically connected to the indicator light display unit, and the indicator light display unit receives an indicator light control signal sent by the control unit, so that the states of the seat sensor indicator light, the seat belt sensor indicator light, the seat monitoring indicator light, and the seat belt monitoring indicator light are changed.
6. The method for monitoring the seat belt according to claim 1, wherein the voice unit comprises a voice control unit and a power amplification unit which are electrically connected, the voice control unit plays specified voice content according to the received alarm signal, and the power amplification unit pushes an external speaker to sound.
7. A method of detecting a failure in a seat belt sensor, wherein the seat belt sensor failure is detected using a seat belt monitoring system comprising:
at least one seat, each said seat having a seat number corresponding thereto;
a seat sensor and a seat belt sensor mounted to the seat, the seat sensor for detecting a human body pressure, the seat sensor generating a seat sensor 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 safety belt sensor signal;
a detection unit for receiving the seat sensor signal and the seatbelt sensor signal and sending the processed seat sensor signal and seatbelt sensor signal to a control unit;
the control unit is used for receiving the seat sensor signal and the safety belt sensor signal sent by the detection unit and sending an indicator light control signal to an indicator light display unit; judging according to the signal state of the seat sensor and the signal state of the safety belt sensor, and if the safety belt of the seat is not fastened, sending an alarm signal to a voice unit;
the seat sensor indicating lamp is electrically connected with the indicating lamp unit and used for displaying a seat sensor signal, the safety belt sensor indicating lamp is used for displaying a safety belt sensor signal, the seat monitoring indicating lamp is used for indicating the working state of the seat sensor, the safety belt monitoring indicating lamp is used for indicating the working state of the safety belt sensor, and the voice indicating lamp is used for indicating the working state of the voice unit;
the seat monitoring switch is electrically connected with the control unit and used for starting the seat monitoring switch for receiving the seat sensor signal, the safety belt monitoring switch for receiving the safety belt sensor signal and the voice prompt switch for playing voice prompt;
the seat belt sensor fault detection method comprises the following steps:
s101: turning on the seat monitoring switch and turning off the safety belt monitoring switch to enable the seat sensor to enter a working state;
s102: the seat monitoring indicator light is on to indicate that a fault detection program of the seat sensor is entered;
s103: when the seat is not occupied, the state of the seat sensor indicator lamp is not changed, and the seat sensor signal is not received;
s104: an inspector sitting on the seat to cause the seat sensor to emit the seat sensor signal;
s105: if the state of the seat sensor indicator light changes, the seat sensor is indicated to work normally; if the state of the seat sensor indicator lamp is not changed, the seat sensor is in failure and needs to be repaired or replaced;
s106: closing the seat monitoring switch and opening the safety belt monitoring switch to enable the safety belt sensor to enter a working state;
s107: the safety belt monitoring indicator lamp is turned on to indicate that a fault detection program of the safety belt sensor is entered;
s108: when the safety belt is not buckled, the state of the safety belt sensor indicator lamp is not changed, and the safety belt sensor signal is not received;
s109: the inspector clasping a seat belt to cause the seat belt sensor to emit the seat belt sensor signal;
s110: if the state of the safety belt sensor indicator lamp changes, the safety belt sensor works normally; if the state of the safety belt sensor indicator lamp is not changed, the safety belt sensor is in failure and needs to be repaired or replaced.
8. The seat belt sensor malfunction detection method according to claim 7, characterized by further comprising, before the step S101, the steps of:
s100: and closing the voice prompt switch.
9. The method of claim 7, wherein the seat belt sensor is a membrane pressure sensor mounted below a seat cushion of the seat, the seat sensor generating the seat sensor 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 safety belt sensor signal.
10. The method for detecting a failure of a seat belt sensor according to claim 7, wherein the control unit is electrically connected to the indicator light display unit, and the indicator light display unit receives an indicator light control signal sent by the control unit, so that the states of the seat belt sensor indicator light, the seat monitoring indicator light, and the seat belt monitoring indicator light are changed.
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| CN201911176592.1A CN112849071A (en) | 2019-11-26 | 2019-11-26 | Seat belt monitoring method and seat belt sensor fault detection method |
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| CN201911176592.1A CN112849071A (en) | 2019-11-26 | 2019-11-26 | Seat belt monitoring method and seat belt sensor fault detection method |
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