Head-mounted device for measuring head environment parameters of vehicle occupants
By integrating sensors and wireless communication modules, the head-mounted environmental parameter measurement device solves the problem that in-vehicle equipment cannot accurately monitor the environment above the occupants' heads, enabling real-time and accurate monitoring of environmental parameters and providing accurate data for occupant health and in-vehicle environment control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA AUTOMOBILE RES INST (CHONGQING) AUTOMOBILE TESTING CO LTD
- Filing Date
- 2025-08-27
- Publication Date
- 2026-07-21
Smart Images
Figure CN224535146U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive environmental parameter measurement technology, specifically to a head-mounted device for measuring environmental parameters of automotive occupants' heads. Background Technology
[0002] With the development of the automotive industry and the increasing health awareness of people, in-vehicle environmental quality monitoring is receiving more and more attention. At present, most in-vehicle environmental monitoring equipment on the market is a fixed design, usually installed in the car dashboard, center console or roof, and can only collect environmental parameters of the area around the device.
[0003] However, such fixed devices have significant limitations: environmental parameters vary within the vehicle's interior, especially in the area near the occupant's head. Influenced by respiration, heat dissipation from hair, and local airflow, parameters such as carbon dioxide concentrations, volatile organic compound concentrations, temperature, and humidity deviate considerably from data collected by fixed devices. This prevents existing equipment from acquiring real-time, accurate environmental data on the actual exposure of the occupant's head, making it difficult to accurately reflect the local environmental quality. Consequently, it cannot provide accurate data for occupant health protection and in-vehicle environmental control, failing to meet users' needs for precise in-vehicle environmental monitoring.
[0004] Therefore, there is an urgent need for a head-mounted device for measuring the head environment parameters of car occupants, which can realize the function of real-time monitoring and measurement of the head environment parameters of car occupants. Utility Model Content
[0005] The technical problem solved by this utility model is to provide a head-mounted vehicle occupant head environment parameter measuring device, which can realize the function of real-time monitoring and measurement of vehicle occupant head environment parameters.
[0006] The basic solution provided by this utility model is: a head-mounted vehicle occupant head environment parameter measuring device, including a head-mounted fixing structure for vehicle occupants to wear on their heads; The head-mounted fixed structure is equipped with an environmental parameter measurement mechanism; The environmental parameter measurement mechanism includes a multi-parameter sensor module, an ADC module, a microcontroller, and a communication module; the input terminal of the ADC module is connected to each sensor in the environmental parameter measurement sensor set; the microcontroller is electrically connected to the ADC module and the communication module respectively; the multi-parameter sensor module integrates a carbon dioxide sensor, a VOC sensor, and a temperature and humidity sensor; the multi-parameter sensor module is located inside the head-mounted fixed structure near the head of the vehicle occupant.
[0007] The principle and advantages of this invention are as follows: In this solution, the microcontroller acts as the core control unit, sending sampling commands to the ADC module according to a preset timing logic (e.g., triggered once per second). This timing triggering mechanism provides a stable time reference for data acquisition, ensuring the periodicity and regularity of environmental parameter measurements.
[0008] A multi-parameter sensor module (integrating a carbon dioxide sensor, a VOC sensor, and a temperature and humidity sensor) continuously monitors parameters such as carbon dioxide concentration, volatile organic compound (VOC) concentration, temperature, and humidity in the environment surrounding the occupant's head and outputs analog electrical signals. Upon receiving the sampling command from the microcontroller, the ADC module immediately performs analog-to-digital conversion on these analog electrical signals, transforming them into digital signals recognizable by the microcontroller, which are then transmitted to the microcontroller. The microcontroller further processes the digital signals (such as filtering and calibration) to ensure the accuracy and reliability of the data.
[0009] The environmental parameter data, processed by the microcontroller, is wirelessly transmitted to the host computer in real time via a communication module (such as Bluetooth). After receiving the data, the host computer can display the changes in environmental parameters in real time and store the data for long-term monitoring and analysis of the environment around the occupant's head.
[0010] In this solution, the device is worn on the occupant's head, with the multi-parameter sensor module close to the head area. This avoids the influence of differences in parameters inside the car and collects real-time data on carbon dioxide, VOCs, temperature, and humidity under the influence of the occupant's breathing and heat dissipation. This solves the data deviation problem of fixed equipment and the data is more consistent with the actual human exposure environment, enabling real-time monitoring and measurement of environmental parameters of the car occupant's head.
[0011] Accurate data can truly reflect the local environmental quality where occupants are located, providing accurate basis for occupant health protection (such as reminding ventilation) and in-vehicle environmental control (such as targeted VOC reduction), making up for the shortcomings of existing equipment in supporting accurate decision-making.
[0012] The head-mounted fixed structure is flexible and adaptable to different occupants. It does not require fixed installation and can monitor the occupant's position synchronously, avoiding the problem of fixed equipment being limited by the installation location. It is suitable for various vehicle models and occupant usage needs.
[0013] Furthermore, the headband-type fixing structure is a ring-shaped headband, which is made of elastic memory material or carbon fiber reinforced plastic.
[0014] Beneficial effects: The ring headband is made of elastic memory material or carbon fiber reinforced plastic, which can adapt to different head shapes, distribute force evenly and improve wearing comfort; it is stable, durable, lightweight and easy to store.
[0015] Furthermore, a fixing strap is connected between the ring-shaped headbands, and multiple multi-parameter sensor modules are provided, distributed inside the ring-shaped headbands and the fixing straps.
[0016] Beneficial effects: The ring-shaped headband with added fixing strap further enhances stability and prevents displacement during activities; multiple multi-parameter sensor modules are located on the inside of the ring-shaped headband and fixing strap, which can conform to different areas of the head such as the forehead and temples, enabling multi-directional data acquisition and avoiding the limitations of single-point monitoring; it can simultaneously acquire physiological signals from different parts of the body, reducing signal deviation and significantly improving monitoring accuracy; at the same time, it adapts to the head contour with the headband and fixing strap, without adding extra burden to wearing, ensuring comfort, and is suitable for scenarios requiring precise sensing such as medical monitoring and sports health.
[0017] Furthermore, the environmental parameter measurement mechanism also includes a power module, which is electrically connected to the microcontroller and is used to supply power to the microcontroller.
[0018] Beneficial effects: The power module is electrically connected to the microcontroller, which can continuously supply power to the microcontroller, avoiding interruption of environmental parameter measurement due to power failure and ensuring monitoring continuity; there is no need to replace batteries frequently, reducing usage costs and operational hassles, and improving convenience; stable power supply can also reduce the impact of voltage fluctuations on the microcontroller, ensuring accurate parameter measurement and adapting to long-term environmental monitoring scenarios.
[0019] Furthermore, the communication module is a wireless communication module.
[0020] Beneficial effects: The communication module adopts a wireless design, eliminating the need for physical wiring and allowing for flexible placement of environmental parameter measurement devices, making it suitable for complex or inconvenient wiring scenarios; it can transmit measurement data remotely in real time, avoiding the hassle of manual on-site data collection and improving data acquisition efficiency; it also reduces the risk of failure caused by line wear and tear, ensuring data transmission stability and meeting the needs of long-term, remote environmental monitoring.
[0021] Furthermore, the wireless communication module includes one or more of the following: WiFi module, Bluetooth module, ZigBee module, and LoRa module.
[0022] Beneficial effects: The wireless communication modules cover a variety of types such as WiFi and Bluetooth, which can be selected as needed: Bluetooth is used for short-range connection with nearby devices, while Lora / ZigBee is used for long-range monitoring; WiFi is suitable for common network environments such as homes, and the combination of multiple modules can also cope with complex scenarios, avoiding the limitations of a single module; at the same time, different modules have their own stable transmission advantages, further ensuring reliable data transmission and adapting to more environmental monitoring needs. Attached Figure Description
[0023] Figure 1This is a logic block diagram of the environmental parameter measurement mechanism in Embodiment 1 of this utility model.
[0024] Figure 2 This is a schematic diagram of the head-mounted fixing structure in Embodiment 1 of this utility model. Detailed Implementation
[0025] The following detailed description illustrates the specific implementation method: The markings in the accompanying drawings include: 1. Circular headband; 2. Fixing strap.
[0026] The basic implementation examples are as follows: Figure 1 and Figure 2 As shown: A head-mounted device for measuring environmental parameters of a car occupant's head, comprising a head-mounted fixing structure for the car occupant to wear. The headband-style fixing structure is a ring-shaped headband 1, which is made of elastic memory material or carbon fiber reinforced plastic. Fixing straps 2 are also connected between the ring-shaped headbands 1. In this embodiment, the ring-shaped headband 1 and the fixing straps 2 are integrally molded. In this embodiment, elastic memory material such as silicone is used to manufacture the ring-shaped headband 1 and the fixing straps 2, with the total weight controlled to 100g. The elastic properties of the ring-shaped headband 1 can adapt to different head circumferences, ensuring that the sensor maintains a fixed distance of 5-10cm from the head's breathing area.
[0027] The head-mounted fixed structure is equipped with an environmental parameter measurement mechanism; The environmental parameter measurement mechanism includes a multi-parameter sensor module, an ADC module, a microcontroller, a power supply module, and a communication module. The input terminal of the ADC module is connected to each sensor in the environmental parameter measurement sensor set. The microcontroller is electrically connected to the ADC module, the power supply module, and the communication module. The multi-parameter sensor module integrates a carbon dioxide sensor, a VOC sensor, and a temperature and humidity sensor. The multi-parameter sensor module is located inside the head-mounted fixed structure near the head of the vehicle occupant. Specifically, multiple multi-parameter sensor modules are provided, distributed inside the annular headband 1 and the fixing strap 2. In this embodiment, the multi-parameter sensor module integrates carbon dioxide, VOC, and temperature and humidity sensors, adopts a MEMS miniaturized design, and is mounted on a flexible circuit board (FPC) inside the headband. Three sensors are installed, positioned at locations corresponding to the occupant's forehead, behind the ears, and on the top of the head. In another embodiment, different sensors are activated at different locations. For example, a carbon dioxide sensor operates at the forehead, a VOC sensor at the behind the ears, and a temperature and humidity sensor at the top of the head. This allows the forehead sensor to capture changes in the carbon dioxide concentration in the occupant's exhaled breath; the behind-the-ear sensor to monitor the ambient air mixing state and avoid localized interference; and the top-of-the-head sensor to supplement measurements of the microenvironment above the head, improving data comprehensiveness. In this embodiment, the carbon dioxide sensor is an external absorption type (MH-Z19) with a measurement range of 0-5000ppm; the VOC sensor is a MiCS-5524 with a measurement range of 0-1000ppb; and the temperature and humidity sensor is a SHT31 with a measurement range of 0-50℃ and 0-100%RH.
[0028] The communication module is a wireless communication module. The wireless communication module includes one or more of the following: WiFi module, Bluetooth module, ZigBee module, and LoRa module. The environmental parameter digital data, processed by the microcontroller, is wirelessly transmitted in real-time to the host computer via the communication module (such as a Bluetooth module). The host computer can be a host computer, cloud server, etc. In this embodiment, a WiFi module is used for wireless transmission.
[0029] The first step involves wearing the ring-shaped headband 1. Specifically, the occupant manually adjusts the tightness of the headband (no motor drive). Movement method: The elastic memory material adapts to the head circumference, and the sensor array automatically aligns with the breathing area (using preset angles or infrared positioning assistance).
[0030] The second step is the monitoring phase. Specifically, the microcontroller, as the core control unit, sends sampling commands to the ADC module according to a preset timing logic (e.g., triggered once per second). Upon receiving the sampling commands from the microcontroller, the ADC module receives continuous monitoring of parameters such as carbon dioxide concentration, volatile organic compound (VOC) concentration, temperature, and humidity around the occupant's head from a multi-parameter sensor module (integrating a carbon dioxide sensor, VOC sensor, and temperature and humidity sensor). The module outputs analog electrical signals, which are then converted from analog to digital signals to digital signals recognizable by the microcontroller and transmitted to it. The microcontroller further processes the digital signals. The processed environmental parameter data is then wirelessly transmitted in real-time to a test computer via a communication module (such as Bluetooth). The test computer receives the data and can display real-time changes in environmental parameters and store the data for long-term monitoring and analysis of the environment around the occupant's head.
[0031] The microcontroller can be a single-chip microcomputer or a PLC. In this embodiment, an STM32 series single-chip microcomputer, specifically the STM32F103 series, is used. A shared clock ADC chip (such as ADS1115) ensures synchronous sampling of the carbon dioxide, VOC, and temperature and humidity sensors at 1Hz. The power module uses a rechargeable lithium battery, such as a 1000mAh lithium polymer battery, which supports continuous operation for 4-8 hours. The corresponding charging interface is located on the outside of the ring-shaped headband 1 and supports fast charging.
[0032] The above are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A head-mounted device for measuring environmental parameters of a car occupant's head, characterized in that: Including headband-style fixation structures for use by car occupants; The head-mounted fixed structure is equipped with an environmental parameter measurement mechanism; The environmental parameter measurement mechanism includes a multi-parameter sensor module, an ADC module, a microcontroller, and a communication module; the input terminal of the ADC module is connected to each sensor in the environmental parameter measurement sensor set; the microcontroller is electrically connected to the ADC module and the communication module respectively; the multi-parameter sensor module integrates a carbon dioxide sensor, a VOC sensor, and a temperature and humidity sensor; the multi-parameter sensor module is located inside the head-mounted fixed structure near the head of the vehicle occupant.
2. The head-mounted vehicle occupant head environment parameter measuring device according to claim 1, characterized in that: The headband is a ring-shaped headband made of elastic memory material or carbon fiber reinforced plastic.
3. The head-mounted vehicle occupant head environment parameter measuring device according to claim 2, characterized in that: The annular headbands are also connected by a fixing strap, and multiple multi-parameter sensor modules are provided, distributed inside the annular headbands and the fixing straps.
4. A head-mounted vehicle occupant head environment parameter measuring device according to claim 3, characterized in that: The environmental parameter measurement mechanism also includes a power module, which is electrically connected to the microcontroller and is used to supply power to the microcontroller.
5. A head-mounted vehicle occupant head environment parameter measuring device according to claim 4, characterized in that: The communication module is a wireless communication module.
6. A head-mounted vehicle occupant head environment parameter measuring device according to claim 5, characterized in that: The wireless communication module includes one or more of the following: WiFi module, Bluetooth module, ZigBee module, and LoRa module.