CN113645418A - Passenger identification security system, carrier and passenger security method - Google Patents
Passenger identification security system, carrier and passenger security method Download PDFInfo
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- CN113645418A CN113645418A CN202110768512.2A CN202110768512A CN113645418A CN 113645418 A CN113645418 A CN 113645418A CN 202110768512 A CN202110768512 A CN 202110768512A CN 113645418 A CN113645418 A CN 113645418A
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000001931 thermography Methods 0.000 claims abstract description 67
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 238000005070 sampling Methods 0.000 claims description 15
- 230000000630 rising effect Effects 0.000 claims description 13
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 8
- 230000002269 spontaneous effect Effects 0.000 abstract description 8
- 238000001914 filtration Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 230000004304 visual acuity Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/30—Transforming light or analogous information into electric information
- H04N5/33—Transforming infrared radiation
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/50—Testing or indicating devices for determining the state of readiness of the equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
- B60R21/01512—Passenger detection systems
- B60R21/0153—Passenger detection systems using field detection presence sensors
- B60R21/01534—Passenger detection systems using field detection presence sensors using electromagneticwaves, e.g. infrared
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V11/00—Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/00 - G01V9/00
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions
- G08B17/125—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions by using a video camera to detect fire or smoke
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/22—Status alarms responsive to presence or absence of persons
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/08—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using communication transmission lines
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J2005/0077—Imaging
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- Fire-Detection Mechanisms (AREA)
Abstract
The invention discloses a passenger identification security system, a carrier and a passenger security method, wherein the system comprises: infrared thermal imaging module, fire extinguisher detection module, communication module and orientation module. The infrared thermal imaging module is arranged in the carrier and used for detecting the temperature and the passenger information in the carrier. The fire extinguisher detection module is arranged on a fire extinguisher fixing frame in the carrier and is electrically connected with the infrared thermal imaging module, the communication module is electrically connected with the infrared thermal imaging module, and the positioning module is respectively electrically connected with the infrared thermal imaging module and the communication module. According to the passenger identification security system adopting the technical scheme, the infrared thermal imaging module can be used for detecting the temperature in the carrier, detecting whether passengers exist in the carrier or not through the outline in the thermal imaging image, and making different actions according to the detection information, so that the probability of casualties of the passengers due to spontaneous combustion of the carrier is reduced. Whether can detect simultaneously and be provided with the fire extinguisher in the carrier, guide the passenger to use the fire extinguisher to reduce car owner's loss of property.
Description
Technical Field
The invention relates to the technical field of vehicle safety monitoring, in particular to a passenger identification security system, a vehicle and a passenger security method.
Background
In summer high-temperature weather, the automobile, especially the new energy automobile occasionally has spontaneous combustion. The conventional automotive spontaneous combustion or high-temperature alarm system only adopts a temperature and humidity sensor to detect the temperature in the automobile, cannot detect whether passengers exist in the automobile, cannot prompt the passengers to evacuate safely in time, and cannot guide the passengers to deal with the fire, so that the passengers are injured and killed.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a passenger identification security system which can detect whether a passenger is in a carrier or not while detecting the temperature in the carrier, thereby controlling the carrier to realize different emergency actions and improving the safety of the carrier.
Another objective of the present invention is to provide a vehicle with the above passenger identification security system and a corresponding passenger security method, so as to improve the safety of the vehicle and reduce the probability of injury and death of passengers due to spontaneous combustion of the vehicle.
The technical scheme is as follows: the passenger security identification system of the invention comprises: the infrared thermal imaging module is arranged in the carrier and used for detecting the temperature and the passenger information in the carrier; the fire extinguisher detection module is arranged on a fire extinguisher fixing frame in the carrier and is electrically connected with the infrared thermal imaging module; the communication module is electrically connected with the infrared thermal imaging module; and the positioning module is electrically connected with the infrared thermal imaging module and the communication module respectively.
Further, still include the cloud platform, infrared thermal imaging module passes through the cloud platform set up in the carrier.
Furthermore, the infrared thermal imaging module comprises a microprocessor circuit and an infrared thermal imaging camera, an image signal of the infrared thermal imaging camera is directly transmitted to the microprocessor circuit, and an analog signal of the infrared thermal imaging camera is transmitted to the microprocessor circuit sequentially through a filter circuit, an amplifying circuit and a first ADC sampling circuit.
Furthermore, the fire extinguisher detection module comprises a pressure sensor, an amplifying and filtering circuit, a power frequency notch circuit and a second ADC sampling circuit, wherein the pressure sensor is electrically connected with the infrared thermal imaging module sequentially through the amplifying and filtering circuit, the power frequency notch circuit and the second ADC sampling circuit.
Further, the pressure sensor is a film pressure sensor.
Further, the cloud platform includes support and drive the rotatory step motor of support, infrared thermal imaging module set up in on the support, step motor with infrared thermal imaging module electric connection.
Furthermore, the number of the infrared thermal imaging cameras is two.
The vehicle comprises the passenger identification security system, and an infrared thermal imaging module of the passenger identification security system is electrically connected with a central control system of the vehicle.
The passenger security method can be implemented by the vehicle, and comprises the following specific steps:
the infrared thermal imaging module scans the internal space of the carrier and monitors the temperature and the state of passengers in the carrier;
if the temperature in the carrier is higher than the temperature threshold value and no passenger is in the carrier, the positioning module positions the carrier and sends the carrier position to the communication module, and the communication module dials a fire alarm and informs the carrier position; if the temperature in the carrier is higher than the temperature threshold and passengers are in the vehicle, the fire extinguisher detection module detects whether a fire extinguisher is arranged on a fire extinguisher fixing frame or not;
if no fire extinguisher exists in the carrier, the voice or display information of the carrier central control system is used for warning passengers to withdraw from the carrier, the positioning module is used for positioning the position of the carrier and sending the position of the carrier to the communication module, the communication module is used for dialing a fire alarm and informing the position of the carrier, and the central control system is used for unlocking a carrier door lock; if the fire extinguisher is arranged in the carrier, the passenger is informed of the position of the fire extinguisher through a carrier central control system, and the corresponding lock is opened.
Further, before the last step, the method also comprises the following steps:
if the rising speed of the temperature in the carrier is greater than the temperature rising threshold value, the carrier central control system controls to turn on the exhaust fan; if the rising speed of the temperature in the carrier is larger than the temperature rising threshold value and passengers are in the carrier, the carrier central control system controls the exhaust fan to be turned on and simultaneously sends out warning information.
Has the advantages that: compared with the prior art, the invention has the following advantages: the infrared thermal imaging module can realize temperature detection in the carrier, can detect whether passengers exist in the carrier through the contour in the thermal imaging image, and can make different actions according to detection information, so that the probability of casualties of the passengers due to spontaneous combustion of the carrier is reduced. Whether can detect simultaneously and be provided with the fire extinguisher in the carrier, guide the passenger to use the fire extinguisher to reduce car owner's loss of property.
Drawings
FIG. 1 is a system block diagram of an occupant identification security system according to an embodiment of the present invention;
FIG. 2 is a block diagram of an infrared thermal imaging module according to an embodiment of the present invention;
FIG. 3 is a block diagram of a fire extinguisher detection module according to an embodiment of the present invention;
FIG. 4 is a flowchart of an occupant security method according to an embodiment of the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
Referring to fig. 1, the passenger identification security system according to the embodiment of the invention includes an infrared thermal imaging module, a fire extinguisher detection module, a communication module and a positioning module. Wherein infrared thermal imaging module sets up inside the carrier, detects temperature and passenger information in the carrier, and fire extinguisher detection module sets up on the fire extinguisher mount in the carrier, with infrared thermal imaging module electric connection. The communication module is electrically connected with the infrared thermal imaging module, and the positioning module is electrically connected with the infrared thermal imaging module and the communication module respectively. It can be understood that the communication module can adopt a 5G or 4G communication mode, and the positioning module can adopt a GPS positioning module or a Beidou positioning module and the like.
According to the passenger identification security system of the technical scheme, the thermal image in the carrier can be detected by the infrared thermal imaging module, so that the temperature in the carrier can be detected, and whether passengers exist in the carrier can be detected by comparing the contours in the thermal image. When spontaneous combustion occurs, the vehicle can be controlled to execute different actions according to whether passengers in the vehicle are communicated with a central control system of the vehicle, the passengers are warned to leave, and the probability of casualties of the passengers due to spontaneous combustion of the vehicle is reduced. Meanwhile, the fire extinguisher detection module can detect whether a fire extinguisher exists in the vehicle or not, and guide the position of the fire extinguisher of a passenger, and the fire extinguisher can be taken in time to reduce financial loss.
Referring to fig. 2, in some embodiments, the infrared thermal imaging module includes a microprocessor circuit and an infrared thermal imaging camera, an image signal of the infrared thermal imaging camera is directly transmitted to the microprocessor circuit, and an analog signal is transmitted to the microprocessor circuit sequentially through a filter circuit, an amplifying circuit and a first ADC sampling circuit. The infrared thermal imaging camera detects the temperature of different objects, draws out infrared patterns with different depths and transmits the infrared patterns to the microprocessor, and the microprocessor judges whether passengers exist in the vehicle or not by comparing the built-in human body infrared profiles. Meanwhile, the infrared thermal imaging camera transmits voltage analog signals corresponding to the temperature of 36-39 ℃ in the pattern to the microprocessor through the amplifying circuit, the filtering circuit and the first ADC sampling circuit. When the microprocessor receives the voltage analog signal at the temperature of 36-39 ℃, the human body contour is compared, and when the comparison similarity reaches 90%, the passenger in the vehicle is considered. In this embodiment, the amplifying circuit adopts a differential amplifying circuit with the amplification factor of 100 times, the first ADC sampling circuit adopts an ADS8353 high-speed high-resolution vehicle-scale ADC chip, the sampling rate is 600K, and the resolution is 16 bits.
In some embodiments, the number of the infrared thermal imaging cameras of the infrared thermal imaging module may be two, one is a main camera and the other is a sub-camera, the main camera always works when the carrier moves, and the sub-camera detects when the main camera detects that a high temperature occurs in the carrier, so as to verify whether the detection of the main camera is accurate.
In some embodiments, in order to improve the detection range of the infrared thermal imaging module, the infrared thermal imaging module is arranged in the carrier through the cradle head, and the infrared thermal imaging module can rotate in a certain range under the driving of the cradle head, so that the omnidirectional detection of the carrier is realized. In this embodiment, the cloud platform is including the support that bears infrared thermal imaging camera and the rotatory step motor of drive support, step motor and infrared thermal imaging module's microprocessor circuit electric connection. The stepping motor has low noise, simple control and is not easy to lose steps, and the stepping angle of the stepping motor is preferably 1.8 degrees in the embodiment. In some embodiments, the rotational speed of the pan/tilt head is a dynamic rotational speed, and when a passenger in the vehicle is detected, the rotational speed is 3 turns per second; when no passenger in the vehicle is detected, the rotating speed of the tripod head is 1 circle per second. Because present infrared thermal imaging camera, when the difference in temperature of being surveyed the object is less, can lead to infrared thermal imaging's contrast to reduce, and resolving power worsens, lead to detecting the temperature inaccurate, so when infrared thermal imaging camera detects that the temperature reaches between 70 to 100 ℃ in the carrier, can reduce the rotational speed of cloud platform, make the detection of main camera more accurate.
Referring to fig. 3, in some embodiments, the fire extinguisher detection module comprises a pressure sensor, an amplification and filtering circuit, a power frequency notch circuit, and a second ADC sampling circuit. The pressure sensor is arranged on the fire extinguisher fixing frame, and when a fire extinguisher is placed on the fire extinguisher fixing frame, the pressure sensor bears the pressure of the fire extinguisher, converts the pressure into an electric signal, and transmits the electric signal to the microprocessor of the infrared thermal imaging module through the amplifying and filtering circuit, the power frequency notch circuit and the second ADC sampling circuit in sequence. In this embodiment, the pressure sensor is a membrane pressure sensor, and the pressure borne by the membrane pressure sensor cannot be damaged even if the pressure exceeds the measuring range of the membrane pressure sensor. Because the frequency of the film pressure sensor is about 100Hz, the amplifying and filtering circuit adopts the combination of a low-pass filtering circuit with the cut-off frequency of 150Hz and a differential amplifying circuit, and the amplification factor is 100 times. After the power frequency trap circuit can filter out strong 50Hz power frequency interference, the output end of the power frequency trap circuit is subjected to voltage following by the universal operational amplifier to reduce the output impedance of the amplified signal, and then the output impedance is transmitted to the second ADC sampling circuit. The second ADC sampling circuit adopts a high-precision ADS8695 chip, the sampling rate is 500K, and the resolution is 18 bits.
In this embodiment, the communication module selects a 5G communication module, the downlink peak rate is 2Gbps, the uplink peak rate is 230Mbps, and the positioning module selects a GPS positioning module. It can be understood that the passenger identification security system can be connected with a central control system of the carrier, alarm and indication information of passengers can be displayed by a loudspeaker and a central control screen of the carrier, and a voice module can be provided and electrically connected with a microprocessor circuit of the infrared thermal imaging module, so that the passenger can be warned by playing pre-recorded voice when spontaneous combustion of the carrier is detected, and the passenger can be instructed to withdraw, extinguish a fire source and reduce property loss.
According to the vehicle of the embodiment of the present invention, the passenger identification security system is provided, the microprocessor circuit of the infrared thermal imaging module is electrically connected to the central control system of the vehicle, and the passenger identification security system can ensure the safety of the passenger in the vehicle according to the following passenger security method through the central control system of the vehicle, as shown in fig. 4, the specific steps include:
the infrared thermal imaging module scans the internal space of the carrier and monitors the temperature and the state of passengers in the carrier;
if the temperature in the carrier is higher than the temperature threshold value and no passenger is in the carrier, the positioning module positions the carrier and sends the carrier position to the communication module, and the communication module dials a fire alarm and informs the carrier position; if the temperature in the carrier is higher than the temperature threshold and passengers are in the vehicle, the fire extinguisher detection module detects whether a fire extinguisher is arranged on a fire extinguisher fixing frame or not;
if no fire extinguisher exists in the carrier, the voice or display information of the carrier central control system is used for warning passengers to withdraw from the carrier, the positioning module is used for positioning the position of the carrier and sending the position of the carrier to the communication module, the communication module is used for dialing a fire alarm and informing the position of the carrier, and the central control system is used for unlocking a carrier door lock; if the fire extinguisher is arranged in the carrier, the passenger is informed of the position of the fire extinguisher through a carrier central control system, and the corresponding lock is opened.
In some embodiments, the temperature threshold may be set to 100 ℃ since the temperature in the vehicle under prolonged exposure in summer may be as high as 70 ℃ or higher, but generally will not exceed 100 ℃. When the infrared thermal imaging sensor detects that no passenger is in the carrier and the temperature in the carrier is higher than 100 ℃, the communication module can call the owner of the carrier while calling a fire alarm. When a fire extinguisher is arranged in the carrier and passengers are arranged in the carrier, the central control system can also play the using mode of the fire extinguisher when informing the position of the fire extinguisher through modes such as voice or display and the like, so as to guide the passengers to put out a fire source in time and reduce loss.
In some embodiments, the infrared thermal imaging module can also control ventilation in the vehicle by controlling the temperature change speed in the vehicle, and give an alarm to the passenger in advance to remind the passenger to check. Namely, if the rising speed of the temperature in the carrier is greater than the temperature rising threshold value, the carrier central control system controls to turn on the exhaust fan; if the rising speed of the temperature in the vehicle is larger than the temperature rising threshold and passengers are in the vehicle, the vehicle central control system controls the exhaust fan to be turned on and simultaneously sends out warning information, and the temperature rising threshold is preferably 10 ℃/min.
Claims (10)
1. An occupant identification security system, comprising:
the infrared thermal imaging module is arranged in the carrier and used for detecting the temperature and the passenger information in the carrier;
the fire extinguisher detection module is arranged on a fire extinguisher fixing frame in the carrier and is electrically connected with the infrared thermal imaging module;
the communication module is electrically connected with the infrared thermal imaging module;
and the positioning module is electrically connected with the infrared thermal imaging module and the communication module respectively.
2. The occupant identification security system of claim 1, further comprising a cradle head, through which the infrared thermal imaging module is disposed within the vehicle.
3. The passenger identification security system according to claim 1, wherein the infrared thermal imaging module comprises a microprocessor circuit and an infrared thermal imaging camera, an image signal of the infrared thermal imaging camera is directly transmitted to the microprocessor circuit, and an analog signal of the infrared thermal imaging camera is transmitted to the microprocessor circuit sequentially through a filter circuit, an amplifying circuit and a first ADC sampling circuit.
4. The passenger identification security system according to claim 1, wherein the fire extinguisher detection module comprises a pressure sensor, an amplification filter circuit, a power frequency notch circuit and a second ADC sampling circuit, and the pressure sensor is electrically connected with the infrared thermal imaging module sequentially through the amplification filter circuit, the power frequency notch circuit and the second ADC sampling circuit.
5. The occupant identification security system of claim 1, wherein said pressure sensor is a membrane pressure sensor.
6. The passenger identification security system according to claim 2, wherein the holder comprises a bracket and a stepping motor for driving the bracket to rotate, the infrared thermal imaging module is disposed on the bracket, and the stepping motor is electrically connected to the infrared thermal imaging module.
7. The occupant identification security system of claim 3, wherein said infrared thermal imaging cameras are two in number.
8. Vehicle provided with a passenger identification security system according to one of claims 1 to 7, characterized in that the infrared thermal imaging module of the passenger identification security system is electrically connected to a central control system of the vehicle.
9. An occupant security method for a vehicle according to claim 8, comprising the steps of:
the infrared thermal imaging module scans the internal space of the carrier and monitors the temperature and the state of passengers in the carrier;
if the temperature in the carrier is higher than the temperature threshold value and no passenger is in the carrier, the positioning module positions the carrier and sends the carrier position to the communication module, and the communication module dials a fire alarm and informs the carrier position; if the temperature in the carrier is higher than the temperature threshold and passengers are in the vehicle, the fire extinguisher detection module detects whether a fire extinguisher is arranged on a fire extinguisher fixing frame or not;
if no fire extinguisher exists in the carrier, the voice or display information of the carrier central control system is used for warning passengers to withdraw from the carrier, the positioning module is used for positioning the position of the carrier and sending the position of the carrier to the communication module, the communication module is used for dialing a fire alarm and informing the position of the carrier, and the central control system is used for unlocking a carrier door lock; if the fire extinguisher is arranged in the carrier, the passenger is informed of the position of the fire extinguisher through a carrier central control system, and the corresponding lock is opened.
10. The occupant security method for a vehicle according to claim 9, further comprising, before the last step, the steps of:
if the rising speed of the temperature in the carrier is greater than the temperature rising threshold value, the carrier central control system controls to turn on the exhaust fan; if the rising speed of the temperature in the carrier is larger than the temperature rising threshold value and passengers are in the carrier, the carrier central control system controls the exhaust fan to be turned on and simultaneously sends out warning information.
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| CN202110768512.2A CN113645418A (en) | 2021-07-07 | 2021-07-07 | Passenger identification security system, carrier and passenger security method |
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