Heart rate collection and transmission device for car seat

Abstract

The utility model discloses a kind of heart rate acquisition transmission devices for car seat, including film induction circuit, bluetooth transmission circuit and controller circuit, and the film induction circuit is connected by bluetooth transmission circuit, to obtain human thigh arterial signal by the film induction circuit;Controller circuit is connected with the bluetooth transmission circuit, to detect when the human thigh arterial signal is below set value, early warning is reminded.Such, heart rate value information can be obtained by human thigh arterial signal, and fatigue degree analysis can be carried out to driver.When detecting that driver is fatigued driving, control signal can be output to the fatigue early warning module, control signal early warning equipment is output by fatigue early warning module, and early warning control, such as voice prompt, massage control, music play or fragrance control, HUD etc., so as to remind driver not to fatigued driving.

Description

Technical Field

[0001] This utility model relates to the field of automotive intelligent seat technology, and in particular to an automotive seat heart rate acquisition and transmission device. Background Technology

[0002] In recent years, with the development of highways and private cars, vehicle safety has become a major concern. According to statistics from the National Bureau of Statistics, approximately one-third of traffic accidents are caused by driver fatigue. These accidents not only result in personal loss of life and property but also have a significant impact on the nation and society. Therefore, developing a reliable driver fatigue warning system has become an urgent societal need. Utility Model Content

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, one objective of this invention is to provide a heart rate acquisition and transmission device for automobile seats.

[0004] To achieve the above objectives, the automotive seat heart rate acquisition and transmission device according to an embodiment of the present invention includes:

[0005] Thin-film sensing circuit;

[0006] A Bluetooth transmission circuit is connected to the thin-film sensing circuit to acquire the human femoral artery signal through the thin-film sensing circuit.

[0007] A controller circuit, connected to the Bluetooth transmission circuit, is used to issue a warning when the signal of the human femoral artery is lower than a set value.

[0008] Furthermore, according to one embodiment of the present invention, the thin-film sensing circuit includes any one or two of a piezoelectric thin-film sensor or a thin-film pressure sensor.

[0009] Furthermore, according to one embodiment of the present invention, the car seat heart rate acquisition and transmission device further includes:

[0010] A Bluetooth display terminal is connected to the Bluetooth transmission circuit to acquire and display the human femoral artery signal through the Bluetooth transmission circuit.

[0011] Furthermore, according to one embodiment of the present invention, the warning reminder includes any one or more of voice prompts, massage control, music playback, or fragrance control.

[0012] Furthermore, according to one embodiment of the present invention, the control circuit includes:

[0013] Controller U2;

[0014] The controller U2 communicates with the automotive electronic control unit via the CAN communication circuit.

[0015] Furthermore, according to one embodiment of the present invention, the CAN communication circuit includes:

[0016] The CAN transceiver controller U3 has its serial port signal transceiver terminals connected to the controller U2 via resistors R7 and R8, respectively, and its CAN signal terminals connected to the CAN communication interface J2 via resistors R5 and R9, respectively.

[0017] Furthermore, according to one embodiment of the present invention, the CAN communication circuit further includes:

[0018] Transient diode D1, one end of which is connected to a signal line of the CAN signal terminal of the CAN transceiver controller U3, and the other end of which is connected to reference ground;

[0019] Transient diode D2, one end of which is connected to another signal line of the CAN signal terminal of the CAN transceiver controller U3, and the other end of which is connected to reference ground;

[0020] Capacitor C21, one end of which is connected to a signal line of the CAN signal terminal of the CAN transceiver controller U3, and the other end of which is connected to reference ground;

[0021] Capacitor C23, one end of which is connected to another signal line of the CAN signal terminal of the CAN transceiver controller U3, and the other end of which is connected to reference ground.

[0022] Furthermore, according to one embodiment of the present invention, the control circuit further includes: a LIN communication circuit, through which the controller U2 is communicatively connected to the automotive electronic control unit, the LIN communication circuit comprising:

[0023] The LIN transceiver controller U5 has its serial port signal transceiver terminals connected to the controller U2 via resistors R13 and R16, respectively. The LIN signal terminal of the LIN transceiver controller U5 is connected to the vehicle's communication interface.

[0024] Furthermore, according to one embodiment of the present invention, the LIN communication circuit further includes:

[0025] Transient diode DR1, one end of which is connected to the signal line of the LIN signal terminal of the LIN transceiver controller U5, and the other end of which is connected to the reference ground;

[0026] Capacitor C27, one end of which is connected to the signal line of the LIN signal terminal of the LIN transceiver controller U5, and the other end of which is connected to the reference ground.

[0027] Furthermore, according to one embodiment of the present invention, the LIN communication circuit further includes:

[0028] Diode D3, the anode of diode D3 is connected to the power supply, and the cathode of diode D3 is connected to the signal line of the LIN signal terminal of the LIN transceiver controller U5 through resistor R14.

[0029] The car seat heart rate acquisition and transmission device provided in this embodiment of the utility model is connected to the thin-film sensing circuit via a Bluetooth transmission circuit to acquire the femoral artery signal through the thin-film sensing circuit. A controller circuit is connected to the Bluetooth transmission circuit to issue a warning when the femoral artery signal is detected to be below a set value. Thus, heart rate information can be obtained from the femoral artery signal, and driver fatigue level can be analyzed. When driver fatigue is detected, a control signal can be output to the fatigue warning module. The fatigue warning module outputs a control signal to the warning device, providing voice prompts, massage control, music playback or aromatherapy control, HUD and other warning controls to remind the driver not to drive while fatigued. Attached Figure Description

[0030] Figure 1 A structural block diagram of the heart rate acquisition and transmission device for automobile seats provided by this utility model;

[0031] Figure 2 A schematic diagram of the Bluetooth transmission circuit structure provided by this utility model;

[0032] Figure 3 A schematic diagram of the controller circuit structure provided by this utility model;

[0033] Figure 4 A schematic diagram of the controller and peripheral circuit structure provided by this utility model;

[0034] Figure 5 A schematic diagram of the CAN communication circuit structure provided by this utility model;

[0035] Figure 6 This is a schematic diagram of the LIN communication circuit structure provided by this utility model.

[0036] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0037] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the present invention.

[0038] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0039] See Figure 1 This utility model provides a car seat heart rate acquisition and transmission device, comprising: a thin-film sensing circuit, a Bluetooth transmission circuit, and a controller circuit. The Bluetooth transmission circuit is connected to the thin-film sensing circuit to acquire the femoral artery signal of the human body through the thin-film sensing circuit. The controller circuit is connected to the Bluetooth transmission circuit to issue an early warning when the femoral artery signal of the human body is lower than a set value.

[0040] Specifically, the car seat heart rate acquisition and transmission device constitutes a fatigue early warning system (FEWS). It collects and analyzes the occupant's physiological signals (heart rate data) through sensors in a thin-film sensing circuit located inside the seat cushion and in contact with the femoral artery, providing a fatigue early warning function. The reference range for normal heart rate is 60-100 beats per minute for adults; a heart rate below 60 beats per minute is considered bradycardia and indicates the occupant is fatigued. Additionally, heart rate values ​​corresponding to moderate and severe fatigue can be set according to the OEM's requirements (e.g., 55 beats per minute and 50 beats per minute). After determining that the occupant is in a certain fatigue state, the FEWS transmits the signal to the cockpit domain controller / body domain controller / seat controller. The cockpit domain controller / body domain controller / seat controller will then execute corresponding actions to provide a warning reminder to the occupant. Furthermore, in one embodiment of this invention, the warning reminder includes any one or more of the following: voice prompts, massage control, music playback or aromatherapy control, and a head-up display (HUD). The controller circuit may further include a fatigue level analysis module and a fatigue warning module. The fatigue level analysis module analyzes the femoral artery signal transmitted via Bluetooth to obtain fatigue-related information, such as heart rate data, which can be used to analyze the driver's fatigue level. When driver fatigue is detected, a control signal is output to the fatigue warning module. This module then outputs a control signal to the warning device, providing voice prompts, massage control, music or aromatherapy control, HUD (Head-Up Display) alerts, etc., to remind the driver not to drive while fatigued.

[0041] Furthermore, in one embodiment of the present invention, the thin-film sensing circuit includes any one or two of a piezoelectric thin-film sensor or a thin-film pressure sensor.

[0042] Piezoelectric thin-film sensors are the best solution for non-invasive monitoring of bodily functions. They can respond very sensitively to weak dynamic signals, such as respiration and heart rate. The monitoring strip is laid flat on the seat near the legs. When a person sits in the chair, the fluctuations in breathing and heartbeats are captured by the piezoelectric thin-film sensor, which then calculates the respiration and heart rate values.

[0043] Thin-film pressure sensors can detect both dynamic and static signals and have excellent resistance to environmental interference. The thin-film pressure sensor only outputs a pressure signal when a person sits on it. When used in conjunction with a piezoelectric thin-film sensor, it improves the reliability of the femoral artery module.

[0044] See Figure 1The car seat heart rate acquisition and transmission device further includes a Bluetooth display terminal, which is connected to the Bluetooth transmission circuit to acquire and display the femoral artery signal. The Bluetooth display terminal can be a smartphone or an in-vehicle tablet, allowing the femoral artery signal to be displayed via either device.

[0045] See Figures 3 to 5 The control circuit includes a controller U2 and a CAN communication circuit. The controller U2 is connected to the vehicle's electronic control unit (ECU) via the CAN communication circuit. The controller U2 can communicate with the ECU through the CAN communication circuit to obtain the vehicle's driving status. When the vehicle is detected to be in motion and the driver is found to be fatigued, a fatigue driving warning is issued; otherwise, it is not necessary to avoid false warnings.

[0046] like Figure 5 As shown, the CAN communication circuit includes a CAN transceiver controller U3. The serial signal transceiver terminals of the CAN transceiver controller U3 are connected to the controller U2 via resistors R7 and R8, respectively. The CAN signal terminals of the CAN transceiver controller U3 are connected to the CAN communication interface J2 via resistors R5 and R9, respectively. The CAN transceiver controller U3 can convert the UART serial port signal output by the controller U2 into a corresponding CAN signal and transmit it to the automotive electronic control unit; or it can convert the CAN signal received from the automotive electronic control unit into a UART serial port signal and transmit it to the controller U2, enabling the controller U2 to obtain information such as the vehicle's driving status.

[0047] See Figure 5The CAN communication circuit further includes: transient diode D1, transient diode D2, capacitor C21, and capacitor C23. One end of transient diode D1 is connected to a signal line of the CAN signal terminal of the CAN transceiver controller U3, and the other end of transient diode D1 is connected to reference ground. One end of transient diode D2 is connected to another signal line of the CAN signal terminal of the CAN transceiver controller U3, and the other end of transient diode D2 is connected to reference ground. One end of capacitor C21 is connected to a signal line of the CAN signal terminal of the CAN transceiver controller U3, and the other end of capacitor C21 is connected to reference ground. One end of capacitor C23 is connected to another signal line of the CAN signal terminal of the CAN transceiver controller U3, and the other end of capacitor C23 is connected to reference ground. Specifically, a filter circuit consisting of transient diodes D1 and D2, capacitors C21 and C23 can absorb interference signals and / or high-voltage pulse signals on the differential signal lines of the CAN signal terminal of the CAN transceiver controller U3, ensuring the stability of the CAN signal and preventing the high-voltage pulse signal from damaging the CAN transceiver controller U3.

[0048] See Figure 3 and Figure 6 The control circuit further includes a LIN communication circuit. The controller U2 communicates with the vehicle's electronic control unit (ECU) via this LIN communication circuit. The LIN communication circuit includes a LIN transceiver controller U5. The serial port transceiver terminals of the LIN transceiver controller U5 are connected to the controller U2 via resistors R13 and R16, respectively. The LIN signal terminal of the LIN transceiver controller U5 is connected to the vehicle's communication interface. The controller U2 can also communicate with the ECU via the LIN communication circuit to obtain the vehicle's driving status. When the vehicle is detected to be in motion and the driver is found to be fatigued, a fatigue driving warning is issued; otherwise, it is not necessary to avoid false warnings.

[0049] See Figure 6 The LIN communication circuit further includes a transient diode DR1 and a capacitor C27. One end of the transient diode DR1 is connected to the signal line of the LIN signal terminal of the LIN transceiver controller U5, and the other end of the transient diode DR1 is connected to reference ground. One end of the capacitor C27 is connected to the signal line of the LIN signal terminal of the LIN transceiver controller U5, and the other end of the capacitor C27 is connected to reference ground. Specifically, the transient diode DR1 and capacitor C27 form a filter circuit, which can absorb interference signals and / or high-voltage pulse signals on the signal line of the LIN signal terminal of the CAN transceiver controller U3, ensuring the stability of the LIN signal and preventing high-voltage pulse signals from damaging the LIN transceiver controller U5.

[0050] See Figure 6 The LIN communication circuit further includes a diode D3, the anode of which is connected to the power supply, and the cathode of which is connected to the signal line of the LIN signal terminal of the LIN transceiver controller U5 via a resistor R14. The diode D3 and resistor R14 form a pull-up circuit, pulling the signal line of the LIN signal terminal to a stable initial voltage, thus ensuring the stability of the signal on the LIN signal terminal.

[0051] The above are merely embodiments of this utility model, but do not limit the patent scope of this utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

[0052] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0053] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes and variations are within the protection scope of the present invention.

Claims

1. A heart rate acquisition and transmission device for automobile seats, characterized in that, include: Thin-film sensing circuit; A Bluetooth transmission circuit is connected to the thin-film sensing circuit to acquire the femoral artery signal through the thin-film sensing circuit. A controller circuit, connected to the Bluetooth transmission circuit, is used to issue a warning when the signal of the human femoral artery is lower than a set value.

2. The heart rate acquisition and transmission device for automobile seats according to claim 1, characterized in that, The thin-film sensing circuit includes any one or two of a piezoelectric thin-film sensor or a thin-film pressure sensor.

3. The heart rate acquisition and transmission device for automobile seats according to claim 1, characterized in that, Also includes: A Bluetooth display terminal is connected to the Bluetooth transmission circuit to acquire and display the human femoral artery signal through the Bluetooth transmission circuit.

4. The heart rate acquisition and transmission device for automobile seats according to claim 1, characterized in that, The warning alerts include any one or more of the following: voice prompts, massage control, music playback, or fragrance control.

5. The heart rate acquisition and transmission device for automobile seats according to any one of claims 1 to 4, characterized in that, The controller circuit includes: Controller U2; The controller U2 communicates with the automotive electronic control unit via the CAN communication circuit.

6. The heart rate acquisition and transmission device for automobile seats according to claim 5, characterized in that, The CAN communication circuit includes: The CAN transceiver controller U3 has its serial port signal transceiver terminals connected to the controller U2 via resistors R7 and R8, respectively, and its CAN signal terminals connected to the CAN communication interface J2 via resistors R5 and R9, respectively.

7. The heart rate acquisition and transmission device for automobile seats according to claim 6, characterized in that, The CAN communication circuit also includes: Transient diode D1, one end of which is connected to a signal line of the CAN signal terminal of the CAN transceiver controller U3, and the other end of which is connected to reference ground; Transient diode D2, one end of which is connected to another signal line of the CAN signal terminal of the CAN transceiver controller U3, and the other end of which is connected to reference ground; Capacitor C21, one end of which is connected to a signal line of the CAN signal terminal of the CAN transceiver controller U3, and the other end of which is connected to reference ground; Capacitor C23, one end of which is connected to another signal line of the CAN signal terminal of the CAN transceiver controller U3, and the other end of which is connected to reference ground.

8. The heart rate acquisition and transmission device for automobile seats according to claim 5, characterized in that, The controller circuit further includes a LIN communication circuit, through which the controller U2 communicates with the automotive electronic control unit. The LIN communication circuit includes: The LIN transceiver controller U5 has its serial port signal transceiver terminals connected to the controller U2 via resistors R13 and R16, respectively. The LIN signal terminal of the LIN transceiver controller U5 is connected to the vehicle's communication interface.

9. The heart rate acquisition and transmission device for automobile seats according to claim 8, characterized in that, The LIN communication circuit also includes: Transient diode DR1, one end of which is connected to the signal line of the LIN signal terminal of the LIN transceiver controller U5, and the other end of which is connected to the reference ground; Capacitor C27, one end of which is connected to the signal line of the LIN signal terminal of the LIN transceiver controller U5, and the other end of which is connected to the reference ground.

10. The heart rate acquisition and transmission device for automobile seats according to claim 8 or 9, characterized in that, The LIN communication circuit also includes: Diode D3, the anode of diode D3 is connected to the power supply, and the cathode of diode D3 is connected to the signal line of the LIN signal terminal of the LIN transceiver controller U5 through resistor R14.

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