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CN-122008815-A - Method, device and equipment for controlling oxygen concentration in vehicle

CN122008815ACN 122008815 ACN122008815 ACN 122008815ACN-122008815-A

Abstract

The application provides a method, a device and equipment for controlling the concentration of oxygen in a vehicle, which are applied to the technical field of controlling the concentration of oxygen in the vehicle. The method includes acquiring a vibration signal generated by the vehicle during driving and an original pulse signal of the driver. And dynamically counteracting vibration interference components in the original pulse signals based on the vibration signals to obtain the pulse signals after noise reduction of the driver. And determining the blood oxygen saturation of the driver according to the pulse signals after noise reduction. According to the blood oxygen saturation and a preset threshold interval, a control instruction of the vehicle-mounted oxygen supply device in the vehicle is generated to adjust the in-vehicle oxygen concentration of the vehicle, and the problem that the measurement accuracy is low due to the fact that the in-vehicle oxygen concentration control system is prone to being interfered by vehicle vibration in the traditional in-vehicle oxygen concentration control system can be solved.

Inventors

  • CHEN RENHONG

Assignees

  • 安徽开阳科技有限公司
  • 奇瑞汽车股份有限公司

Dates

Publication Date
20260512
Application Date
20260324

Claims (10)

  1. 1. A method for controlling oxygen concentration in a vehicle, the method comprising: acquiring a vibration signal generated in the driving process of a vehicle and an original pulse signal of a driver; Dynamically counteracting vibration interference components in the original pulse signals based on the vibration signals to obtain pulse signals after noise reduction of the driver; Determining the blood oxygen saturation of the driver according to the pulse signals after noise reduction; and generating a control instruction of the vehicle-mounted oxygen supply device in the vehicle according to the blood oxygen saturation and a preset threshold interval so as to adjust the concentration of oxygen in the vehicle.
  2. 2. The method of claim 1, wherein the raw pulse signal is acquired by a digital-to-abdominal conformable PPG sensor; the finger-belly attaching type PPG sensor is arranged on the inner side of a steering wheel rim of the vehicle and comprises an arc-shaped flexible substrate, and at least one light source and at least one photoelectric detector which are arranged on the arc-shaped flexible substrate; the light source and the photoelectric detector are arranged on the arc-shaped flexible substrate at a preset interval; The surface of the arc-shaped flexible substrate is provided with a curved surface structure, and the curved surface structure is attached to the abdomen surface of the driver; The light source comprises a first light emitting diode and a second light emitting diode, the wavelength of the first light emitting diode is different from that of the second light emitting diode, and the photoelectric detector is used for receiving light emitted by the first light emitting diode and the second light emitting diode.
  3. 3. The method of claim 1, wherein dynamically canceling vibration disturbance components in the raw pulse signal based on the vibration signal results in the driver's denoised pulse signal, comprising: For any driving moment, weighting the vibration signals based on the weight coefficient of the current driving moment to construct a vibration interference component of the current driving moment; And subtracting the constructed vibration interference component from the original pulse signal to obtain the pulse signal after noise reduction at the current driving moment.
  4. 4. A method according to claim 3, characterized in that the method further comprises: and adjusting the weight coefficient according to the pulse signal and the vibration signal after noise reduction at the current driving moment to obtain the weight coefficient at the next driving moment.
  5. 5. The method of claim 4, wherein the adjusting the weight coefficient according to the pulse signal and the vibration signal after noise reduction at the current driving moment to obtain the weight coefficient at the next driving moment includes: Multiplying the pulse signal after noise reduction at the current driving moment by the vibration signal at the current driving moment to obtain a product result; multiplying the product result by a preset step factor to obtain a weight adjustment quantity, wherein the step factor is determined based on the running state of the vehicle at the current driving moment; and adding the weight coefficient of the current driving moment to the weight adjustment quantity to obtain the weight coefficient of the next driving moment.
  6. 6. The method of claim 1, wherein the determining the blood oxygen saturation of the driver from the denoised pulse signal comprises: extracting a first alternating current component and a first direct current component corresponding to the first light emitting diode and a second alternating current component and a second direct current component corresponding to the second light emitting diode from the pulse signal after noise reduction; Determining a ratio parameter according to the ratio of the first alternating current component to the first direct current component and the ratio of the second alternating current component to the second direct current component; and converting the ratio parameter into blood oxygen saturation according to a preset corresponding relation.
  7. 7. The method according to claim 1, wherein the generating a control command of the in-vehicle oxygen supply device in the vehicle according to the blood oxygen saturation level and a preset threshold interval to adjust the in-vehicle oxygen concentration of the vehicle includes: Generating a first control instruction to control the vehicle-mounted oxygen supply device to operate at a first power under the condition that the blood oxygen saturation is determined to be located in a first threshold interval and the duration reaches a first preset duration; And/or generating a second control instruction to control the vehicle-mounted oxygen supply device to operate at a second power when the blood oxygen saturation is determined to be in a second threshold interval and the duration reaches a second preset duration, wherein the upper limit value of the second threshold interval is lower than the lower limit value of the first threshold interval, the second preset duration is smaller than the first preset duration, and the second power is higher than the first power; And/or generating a third control instruction to control the vehicle-mounted oxygen supply device to operate at a third power when the blood oxygen saturation is determined to be in a third threshold interval and the duration reaches a third preset duration, wherein the upper limit value of the third threshold interval is lower than the lower limit value of the second threshold interval, the third preset duration is smaller than the second preset duration, and the third power is higher than the second power.
  8. 8. The method of claim 7, wherein for any one of the first control command, the second control command, and the third control command, controlling the on-board oxygen supply device to operate at a target power corresponding to the target control command comprises: Calculating a deviation amount between the blood oxygen saturation and a target blood oxygen value; and generating the target control instruction according to the current value of the deviation amount, the accumulated value of the deviation amount and the change rate of the deviation amount so as to adjust the target power of the vehicle-mounted oxygen supply device.
  9. 9. An in-vehicle oxygen concentration control apparatus, characterized by comprising: the acquisition module is used for acquiring vibration signals generated in the driving process of the vehicle and original pulse signals of a driver; the processing module is used for dynamically counteracting vibration interference components in the original pulse signals based on the vibration signals to obtain pulse signals after noise reduction of the driver; the determining module is used for determining the blood oxygen saturation of the driver according to the pulse signals after noise reduction; The generation module is used for generating a control instruction of the vehicle-mounted oxygen supply device in the vehicle according to the blood oxygen saturation and a preset threshold interval so as to adjust the concentration of oxygen in the vehicle.
  10. 10. An in-vehicle oxygen concentration control apparatus, characterized in that it comprises a processor and a memory storing machine-executable instructions executable by the processor to implement the in-vehicle oxygen concentration control method according to any one of claims 1 to 8.

Description

Method, device and equipment for controlling oxygen concentration in vehicle Technical Field The application relates to the technical field of in-vehicle oxygen concentration control, in particular to a method, a device and equipment for controlling in-vehicle oxygen concentration. Background With the rise of the intelligent level of automobiles, the physiological state monitoring of drivers has become an important component of intelligent cabin systems. Especially in low-oxygen environments such as highland, tunnel or long-time driving scenes, the driver is easy to have symptoms such as blood oxygen saturation (saturation of pulse oxygen, SPO 2) drop, fatigue, dizziness, judgment drop and the like, and the driving safety is seriously threatened. To cope with this problem, the related art attempts to combine blood oxygen monitoring with on-board oxygen supply. However, the scheme mainly has the following problems that firstly, the external wearable device needs to be actively worn by a user, has poor experience and is easy to fall off, and data continuity is difficult to ensure, and secondly, a large amount of noise is superimposed in pulse wave signals due to complex vibration in the running process of a vehicle, so that the measurement accuracy is low. Therefore, there is a need for a method, apparatus and device for controlling oxygen concentration in a vehicle, so as to solve the problem that the measurement accuracy is low due to the fact that the conventional system for controlling oxygen concentration in a vehicle is easily interfered by vibration of the vehicle. Disclosure of Invention The application aims to provide a method, a device and equipment for controlling the oxygen concentration in a vehicle, which solve the problem that the measurement accuracy is low due to the fact that the conventional system for controlling the oxygen concentration in the vehicle is easy to be interfered by vibration of the vehicle. In a first aspect, an embodiment of the present application provides a method for controlling oxygen concentration in a vehicle, where the method includes obtaining a vibration signal generated during driving of the vehicle and an original pulse signal of a driver. And dynamically counteracting vibration interference components in the original pulse signals based on the vibration signals to obtain the pulse signals after noise reduction of the driver. And determining the blood oxygen saturation of the driver according to the pulse signals after noise reduction. And generating a control instruction of the vehicle-mounted oxygen supply device in the vehicle according to the blood oxygen saturation and a preset threshold interval so as to adjust the oxygen concentration in the vehicle. According to the in-vehicle oxygen concentration control method provided by the embodiment of the application, the vibration signal in the running process of the vehicle is collected as the reference noise, so that the vibration interference component in the original pulse signal is dynamically counteracted, the influence of the complex vibration environment of the vehicle on blood oxygen monitoring is restrained, and the accuracy and stability of blood oxygen measurement are improved. Meanwhile, according to the blood oxygen saturation obtained through calculation after noise reduction and a preset multi-level threshold interval, a corresponding control instruction is generated to adjust the running power of the vehicle-mounted oxygen supply device, automatic closed-loop control from monitoring of the physiological state of a driver to adjusting of the oxygen concentration in the vehicle is realized, the problem that monitoring and intervention are mutually independent in the related art is solved, and driving safety and comfort are improved. In one possible implementation, the raw pulse signal is acquired by a finger-abdomen fitting PPG sensor. The abdomen laminating formula PPG sensor sets up in the steering wheel rim inboard of vehicle. The finger-abdomen fitting type PPG sensor comprises an arc-shaped flexible substrate, and at least one light source and at least one photoelectric detector which are arranged on the arc-shaped flexible substrate. The light source and the photodetector are arranged on the arc-shaped flexible substrate at predetermined intervals. The surface of the arc-shaped flexible substrate is provided with a curved surface structure. The curved surface structure is attached to the finger-web surface of the driver. The light source comprises a first light emitting diode and a second light emitting diode. The wavelength of the first light emitting diode is different from the wavelength of the second light emitting diode. The photodetector is used for receiving light emitted by the first light emitting diode and the second light emitting diode. A possible implementation mode dynamically counteracts vibration interference components in an original pulse signal based on a vibration signal to