Anti-pinch sensing device, anti-pinch sensing method, and carrier and computer program product thereof

Abstract

This patent relates to the field of vehicle safety equipment technology, and particularly to an anti-pinch sensing device, anti-pinch sensing method, and its carrier and computer program product, comprising: a conductive rubber strip, used to be installed on one of a door or door frame, and measuring the capacitance value of an object approaching the conductive rubber strip; when the door and door frame are closed, there is a gap between the conductive rubber strip and the opposite door or door frame; and a controller, communicatively connected to the conductive rubber strip, used to convert the capacitance signal transmitted by the conductive rubber strip into a digital signal and transmit it. The anti-pinch sensing device provided by this patent uses a conductive rubber strip, which has good conductivity and flexibility, allowing it to be installed close to the edge of the door or door frame while effectively detecting the capacitance of approaching objects.

Description

Technical Field

[0001] This patent relates to the field of vehicle safety equipment technology, and in particular to an anti-pinch sensing device, an anti-pinch sensing method, and a vehicle and computer program product thereof. Background Technology

[0002] The importance of anti-pinch door features in modern automobiles is self-evident. When a car door closes, if a passenger's hand, foot, or other body part, or even a pet, gets caught in the door, it can cause serious injury. Anti-pinch devices ensure that the door stops closing immediately or reverses direction upon contact with an obstacle, effectively preventing such accidents.

[0003] The anti-pinch function of car doors mainly relies on sensors and control modules. Pressure sensors or infrared sensors are typically installed on the edges of the doors. These sensors can detect contact or proximity between the door and an obstacle. Once the sensors detect an anomaly, such as a foreign object obstructing the door from closing, the control module will react immediately, using a motor reversal or other mechanical means to stop the door from closing or automatically open it, thus preventing pinching injuries.

[0004] Improving the sensitivity of anti-pinch devices and ensuring their proper placement between the door and frame have become pressing issues. Summary of the Invention

[0005] To solve, or at least partially solve, the aforementioned technical problems, this patent provides an anti-pinch sensing device, comprising:

[0006] A conductive rubber strip is used to be installed on one of the doors or door frames to measure the capacitance of objects near the conductive rubber strip. When the door and door frame are closed, there is a gap between the conductive rubber strip and the door or door frame opposite it.

[0007] The controller, which communicates with the conductive rubber strip, is used to convert the capacitive signal transmitted by the conductive rubber strip into a digital signal and transmit it.

[0008] Optionally, the conductive rubber strip includes:

[0009] The conductive rubber layer is directly exposed to the air and is used to measure the capacitance of objects that are close to or in direct contact with the conductive rubber strip.

[0010] Optionally, the conductive rubber strip includes:

[0011] Conductive rubber layer;

[0012] An insulating rubber layer is wrapped around a conductive rubber layer. The conductive rubber layer can measure the capacitance of objects in contact with the insulating rubber layer.

[0013] Optionally, the resistance of the conductive rubber layer is in the range of 300Ω to 4KΩ.

[0014] Optionally, when the door and the door frame are closed, the gap between the conductive rubber strip and the door or door frame opposite it is greater than or equal to 3mm.

[0015] Optionally, when the door and door frame are closed, the conductive rubber strip can abut against the external watertight seal provided on the opposite door or door frame.

[0016] Optionally, the controller is installed in the dry area of ​​the door or door frame, and the lead wire of the controller passes through the wire hole provided in the dry area and is electrically connected to the conductive rubber strip. A waterproof rubber plug is provided on the wire hole.

[0017] The controller communicates with the host of the vehicle and responds to the start / stop signal of the host to start or stop the detection of the capacitor signal.

[0018] This patent also provides a door for a vehicle, on which the aforementioned anti-pinch sensing device is provided.

[0019] This patent also provides a door frame for a vehicle, on which the aforementioned anti-pinch sensing device is provided.

[0020] This patent also provides a vehicle on which the aforementioned door is provided, or a vehicle on which the aforementioned door frame is provided.

[0021] This patent also provides an anti-pinch sensing method, including the following steps:

[0022] Continuously acquire the capacitance value of the conductive rubber strip;

[0023] When the difference between the capacitance value and the capacitance calibration value when the door is open is greater than the first preset value, the first alarm signal is issued.

[0024] Optionally, the anti-pinch sensing method also includes:

[0025] In response to the off signal, the capacitance value of the conductive rubber strip is obtained;

[0026] Determine whether the difference between the acquired capacitance value and the preset capacitance calibration value in the off state is greater than a second preset value; if the determination is yes, repeat the acquisition and determination steps, or issue a second alarm signal;

[0027] If the determination is negative, the obtained capacitance value will be used as the capacitance calibration value for this closed state.

[0028] Optionally, the shutdown signal includes any one or a combination of the following signals:

[0029] Lock signal;

[0030] Gear signal;

[0031] Speed ​​signal.

[0032] Optionally, in the step of determining whether the difference between the obtained capacitance value and the calibrated capacitance value in the calibrated off state is greater than a second preset value;

[0033] If the determination is yes, then further obtain the rain and snow characterization signals;

[0034] If rain and snow characteristics can be obtained, it is determined that the anti-pinch sensor device has failed due to rain and snow, and a third alarm signal is issued.

[0035] If the result is negative, a short circuit is determined to exist, and a second alarm signal will still be issued.

[0036] Optionally, the rain / snow characterization signal includes any one or a combination of the following signals:

[0037] External temperature signal;

[0038] Rain gauge sensor signal;

[0039] Wiper start / stop signal;

[0040] Real-time weather signals for the current area.

[0041] Optionally, before the step of continuously acquiring the capacitance value of the conductive rubber strip, the method further includes:

[0042] In response to the door unlock signal, the capacitance value of the conductive rubber strip is obtained;

[0043] Determine whether the difference between the obtained capacitance value and the capacitance calibration value in the previous calibrated closed state is greater than a third preset value; if not, determine that the door has not been successfully opened.

[0044] If so, the obtained capacitance value will be used as the capacitance calibration value for this current on state;

[0045] Before issuing the first alarm signal, the capacitance calibration value of the current open state is used as the calibration value to be compared with the capacitance value of the current state.

[0046] Optionally, in the step of continuously acquiring the capacitance value of the conductive rubber strip;

[0047] The capacitance value of the conductive rubber strip is obtained in a period of 80ms to 200ms.

[0048] Optionally, in the step of continuously acquiring the capacitance value of the conductive rubber strip;

[0049] When the difference between the capacitance value and the capacitance value when the door is open is greater than the fourth preset value but less than the first preset value, the cycle time for obtaining the capacitance value of the conductive rubber strip is reduced.

[0050] Optionally, in the step of continuously acquiring the capacitance value of the conductive rubber strip;

[0051] When the difference between the capacitance value and the capacitance value when the door is open is greater than the fourth preset value and less than the first preset value, the period for obtaining the capacitance value of the conductive rubber strip will be reduced to the range of 1ms to 20ms.

[0052] This patent also provides a computer program product in which the computer program, when executed by a processor, can perform the aforementioned steps.

[0053] Compared with existing technologies, this patent has the following technical advantages:

[0054] This patented anti-pinch sensor uses a conductive rubber strip, which possesses excellent conductivity and flexibility. This allows it to be fitted snugly to the edge of a door or door frame while effectively detecting the capacitance of approaching objects. The conductive rubber strip consists of a conductive rubber layer and an insulating rubber layer. The insulating rubber layer effectively isolates the conductive rubber layer from external objects, preventing short circuits caused by contact with the door or door frame, thus improving the reliability and durability of the anti-pinch sensor. The sensitivity of the anti-pinch sensor is enhanced by increasing the frequency of capacitance detection on the conductive rubber strip as an object approaches. When the object is far from the conductive rubber strip, or when the door or door frame is closed, the detection frequency is reduced to save power and extend the device's lifespan. By receiving various information such as vehicle lock status, gear position, and external temperature signals, the device determines the opening / closing status of the door and door frame, the effectiveness of the anti-pinch sensor, and whether an object is approaching, thus improving the accuracy of anti-pinch detection. Attached Figure Description

[0055] To more clearly illustrate the embodiments of this patent, the relevant drawings will be briefly described below. It should be understood that the drawings described below are only for illustrating some embodiments of this patent, and those skilled in the art can obtain many other technical features and connections not mentioned herein based on these drawings.

[0056] Figure 1 This is a schematic cross-sectional view of a conductive rubber strip according to an embodiment of this patent;

[0057] Figure 2 This is a schematic diagram of a controller according to an embodiment of this patent;

[0058] Figure 3 This is an illustration of another controller according to an embodiment of this patent;

[0059] Figure 4This is a schematic diagram of the conductive rubber strip according to an embodiment of this patent in the closed state of the door and door frame;

[0060] Figure 5 This is a schematic diagram of the contact between the conductive rubber strip of this patent embodiment and the door frame in the closed state.

[0061] Figure 6 This is a diagram of capacitance signals when a door is opened, closed, or when an object approaches / touches the conductive rubber strip, according to an embodiment of this patent.

[0062] Figure 7 This is a schematic diagram showing the results of detecting an object using conductive rubber strips with different resistances according to an embodiment of this patent.

[0063] Figure 8 This is a diagram showing the installation position of the conductive rubber strip on the door according to an embodiment of this patent.

[0064] Figure 9 This is a diagram showing the installation position of the conductive rubber strip on the door frame according to an embodiment of this patent.

[0065] Explanation of reference numerals in the attached figures:

[0066] 1. Conductive rubber strip;

[0067] 11. Conductive rubber layer;

[0068] 12. Insulating rubber layer;

[0069] 2. Controller;

[0070] 21. Lead wire;

[0071] 22. Waterproof rubber stopper. Detailed Implementation

[0072] The patent will now be described in detail with reference to the accompanying drawings.

[0073] In existing technologies, anti-pinch devices employ a variety of detection components, including pressure sensors and Hall effect sensors. While pressure sensors can directly detect changes in pressure, they may fail to detect objects that are in their blind spots or exert minimal force, such as a finger placed at the corner of a pair of scissors, thus malfunctioning the anti-pinch function. Hall effect sensors rely on changes in magnetic fields to identify objects. However, for small objects like fingers, the resulting magnetic field changes may be insufficient, making it difficult for Hall effect sensors to quickly identify and execute anti-pinch actions.

[0074] Implementation Method 1

[0075] In view of this, this embodiment provides an anti-pinch sensing device. The conductive rubber strip 1 of the anti-pinch sensing device can measure the capacitance value of an approaching object. When the automatic door is closed, if an object approaches the door or door frame, the conductive rubber strip 1 can measure the capacitance value of the approaching object and then transmit the signal to the door controller 2, causing the door to pause closing or open in the opposite direction, thereby achieving the anti-pinch effect and purpose.

[0076] Specifically, see Figures 1 to 3 As shown, the anti-pinch sensing device includes:

[0077] A conductive rubber strip 1 is used to be installed on one of the doors or door frames and to measure the capacitance value of objects close to the conductive rubber strip 1. When the door and door frame are closed, there is a gap between the conductive rubber strip 1 and the door or door frame opposite it.

[0078] The controller 2 is communicatively connected to the conductive rubber strip 1 and is used to convert the capacitance signal transmitted by the conductive rubber strip 1 into a digital signal and transmit it.

[0079] The anti-pinch sensing device of this embodiment may include a conductive rubber strip 1 and a controller 2. The conductive rubber strip 1 may be disposed on either a door or a door frame. When the conductive rubber is disposed on a door, it may be arranged along the edge of the door; when the conductive rubber is disposed on a door frame, it may be arranged along the edge of the door frame. The conductive rubber strip 1 measures the capacitance value of objects close to it, such as a person's limbs, clothing, or a bag. There is a certain gap between the conductive rubber and the door or door frame opposite it to avoid the conductive rubber contacting the door or door frame and detecting capacitance values ​​with excessive deviation, which would interfere with the analysis and judgment of the detection signal by the receiving terminal.

[0080] The controller 2 is communicatively connected to the conductive rubber strip 1 and is used to convert the capacitance signal transmitted by the conductive rubber strip 1 into a digital signal and transmit it. The capacitance signal is an analog signal, which is converted into a digital signal by the controller 2 and then transmitted to the receiving end.

[0081] It should be noted that the conductive rubber strip 1 is a special type of rubber material in which conductive particles (such as silver-plated glass, silver-plated aluminum, silver, etc.) are uniformly distributed within the silicone rubber. Pressure is applied to bring the conductive particles into contact, thereby achieving good conductivity. The capacitance measurement principle of the conductive rubber strip 1 mainly relies on the working principle of a capacitance sensor. That is, when a user or object touches or approaches the conductive rubber strip 1, it causes a change in capacitance value, which can be captured and identified by the system.

[0082] Specifically, the conductive rubber strip 1, as part of a capacitive sensor, has parasitic capacitance with surrounding conductive objects, such as the human body or a metal frame. When a person's finger touches or approaches the conductive rubber strip 1, a new electrostatic capacitance is formed. This newly added capacitance is related to the conductive connection between the human body and the ground. The working principle of capacitance detection relies on the microprocessor's precise capture of the subtle capacitance changes between the human body and the electrodes. By measuring this capacitance change, the system can determine whether an object has touched or approached the conductive rubber strip 1.

[0083] For example, in a scenario where the anti-pinch sensor device of this embodiment is installed, the conductive rubber strip 1 is installed on the door frame of a car door. When a passenger gets out of the car and the door is about to close, the limb or object is on the movement trajectory of the door edge. When the conductive rubber strip 1 is about to contact or has already contacted the person's limb or object, the conductive rubber strip 1 generates a capacitance change. This capacitance change generates an electrical signal. After the capacitance change is converted into a digital signal by the controller 2 and transmitted to the system, and is successfully recognized by the system, if it is different from the signal value when the door is closed, or if the contact signal value is within the set signal range, the system controls the door to stop moving or open in the reverse direction, thus realizing the anti-pinch function.

[0084] In an optional embodiment, the conductive rubber strip 1 can also be set on the outer edge of the window or the inner edge of the window frame. During the process of the window being raised, it can detect the capacitance of the object approaching it and transmit the capacitance signal to the controller 2. The controller 2 converts the signal into a digital signal and sends it to the system. The system identifies the signal and gives the corresponding anti-pinch command, so that the window stops moving or retracts in the opposite direction.

[0085] This embodiment also provides a door of a vehicle, on which the aforementioned anti-pinch sensing device is provided.

[0086] Furthermore, this embodiment provides a door frame for a vehicle, on which the aforementioned anti-pinch sensing device is provided.

[0087] Vehicle doors are the main passageways for passengers to enter and exit vehicles, and they are also the most vulnerable to pinching accidents. Therefore, installing anti-pinch devices on vehicle doors can directly protect passenger safety and prevent fingers or other body parts from being pinched during door closing.

[0088] See Figure 8 and Figure 9 As shown, the vehicle door is equipped with the anti-pinch sensor of this embodiment. The opening method of the vehicle door can be: swing type, side pull type, scissor type, butterfly type, double-opening type, gull wing type, swivel type, or rotating type, etc. Depending on the opening method, the anti-pinch sensor can be installed in different places, such as the side of the door frame or the edge of the door.

[0089] When the vehicle door opens in a swing configuration, the anti-pinch sensor can be installed on either the door or the door frame. When the vehicle door opens in a butterfly, double-leaf, or gull-wing style, the anti-pinch sensor can be installed on the inside of the door edge. The door frame is matched to the vehicle's door frame, and the anti-pinch sensor operates differently depending on the door's orientation.

[0090] This embodiment further provides a vehicle on which the aforementioned door is provided, or a vehicle on which the aforementioned door frame is provided.

[0091] A vehicle can be a means of transportation that carries or transports people, goods, or equipment, such as cars, trains, airplanes, buses, subways, etc. A vehicle can also be equipment used for teaching or simulating transportation, such as a racing simulator. In short, any equipment that can carry people and requires a door for easy entry and exit can be included in the category of a vehicle. In this embodiment, the vehicle can be equipped with the aforementioned anti-pinch sensor to achieve an anti-pinch function when the door is closed.

[0092] Furthermore, this embodiment also provides a computer program product in which the computer program, when executed by a processor, can perform the aforementioned steps.

[0093] Automatic door anti-pinch mechanisms typically rely on algorithms, which are integrated into a computer program mounted on a mounting device. The conductive rubber strip 1 on the automatic door is connected to this computer program. The electrical signal, being an analog signal, is transmitted to the computer via the conductive rubber.

[0094] Implementation Method 2

[0095] This embodiment also proposes an anti-pinch sensing device. This embodiment is a further improvement on Embodiment 1, the improvement being that the conductive rubber strip 1 is further divided into two parts: a conductive rubber layer 11 and an insulating rubber layer 12, and the resistance parameter range of the conductive rubber layer 11 is set. The conductive rubber layer 11 is a capacitance detection layer, and the insulating rubber layer 12 can isolate the conductive rubber layer 11 from contact with doors, door frames, or solids and liquids in the external environment. The conductive rubber layer 11 and the insulating rubber layer 12 can be used in combination to adapt to application requirements in different scenarios.

[0096] Specifically, see Figure 1 As shown, the conductive rubber strip 1 includes:

[0097] The conductive rubber layer 11 is directly exposed to the air and is used to measure the capacitance value of objects that are close to or in direct contact with the conductive rubber strip 1.

[0098] Exposing the conductive rubber layer 11 directly to the air enhances its sensitivity to capacitive sensing of nearby objects. Furthermore, external objects or liquids can directly contact the conductive rubber layer 11. Algorithm analysis of the signals detected by the conductive rubber layer 11 improves the detection accuracy of the anti-pinch sensor and enhances its adaptability in different scenarios.

[0099] Optionally, see Figure 1 As shown, the conductive rubber strip 1 includes:

[0100] Conductive rubber layer 11;

[0101] An insulating rubber layer 12 is wrapped around a conductive rubber layer 11, which is capable of measuring the capacitance of an object in contact with the insulating rubber layer 12.

[0102] The conductive rubber layer 11, which covers the insulating rubber layer, ensures safety and prevents external damage while maintaining stable conductivity. The insulating rubber layer 12 prevents current from flowing directly through the human body or other conductors, thus avoiding the risk of electric shock, and also prevents sudden increases in the capacitance value detected by the conductive rubber layer 11. In addition, the insulating layer can also protect the conductive rubber layer 11 from external environmental corrosion to a certain extent, extending its service life.

[0103] Compared to directly exposing the conductive rubber layer 11 to the environment, the conductive rubber layer 11 with insulating rubber layer 12 may experience a slight decrease in sensitivity due to the presence of the insulating layer, which hinders direct contact between the conductive rubber layer 11 and objects. However, the conductive rubber layer 11 with insulating rubber layer 12 does not experience a surge in capacitance due to direct contact with external objects, thus reducing the algorithm recognition cost of the signal processing program. Furthermore, the conductive rubber layer 11 with insulating rubber layer 12 can reduce the impact of environmental factors such as humidity and temperature changes caused by weather on the accuracy of capacitance detection.

[0104] Optionally, see Figure 7 As shown, the resistance of the conductive rubber layer 11 is in the range of 300Ω to 4KΩ.

[0105] The resistance of conductive rubber materials is affected by a variety of factors, typically including the type of conductive rubber, its thickness, the distribution of conductive particles, temperature, and pressure. When an object approaches, the conductive rubber material can measure the capacitance of the object and send an electrical signal; however, when the conductive rubber material is subjected to pressure, its resistance usually decreases, its sensitivity increases, and the signal detection difference becomes larger.

[0106] If the resistance of the conductive rubber strip 1 is too high, it may cause poor signal transmission or reduced sensitivity. If the resistance of the conductive rubber strip 1 is too low, it may make the sensing device too sensitive to minute pressure changes, leading to false triggering or signal instability.

[0107] In a preferred embodiment, the resistance of the conductive rubber layer 11 is in the range of 500Ω to 2kΩ, ensuring normal device function while saving on material manufacturing costs. Furthermore, setting the resistance in the range of 800-1000kΩ is an even better choice.

[0108] Implementation Method 3

[0109] This embodiment also proposes an anti-pinch sensing device. This embodiment is a further improvement on embodiment one or two, the improvement being that a distance is set between the conductive rubber strip 1 and the door or door frame opposite it. Its function is to prevent the conductive rubber strip 1 from contacting the door or door frame, thus avoiding excessively high capacitance differences that could affect the system's judgment of other contact signals.

[0110] Specifically, see Figure 4 As shown, when the door and door frame are closed, the gap between the conductive rubber strip 1 and the opposite door or door frame is greater than or equal to 3mm. Of course, to improve sealing performance, the gap is preferably less than 10mm.

[0111] Compared to having the conductive rubber strip 1 in contact with the corresponding door or door frame when the door and door frame are closed, maintaining a certain distance ensures that the capacitance value measured by the conductive rubber strip 1 will not be too large. When the door and door frame are closed, if the conductive rubber strip 1 directly contacts the door or door frame, a short circuit will occur. If a hand directly contacts the conductive rubber strip 1 when the door is open, and the measured capacitance is similar to that measured when the door frame is closed, the system may fail to recognize the similar capacitance signal, leading to a misjudgment. This could result in the door controller 2 still operating when the system determines that the door is closed, potentially trapping a person's hand.

[0112] pass Figure 4 As can be seen, when the door and door frame are closed, the gap between the conductive rubber strip 1 and the opposite door or door frame is greater than or equal to 3mm. This ensures that the capacitance value of the conductive rubber strip 1 will not be too large even when the capacitance value of the door or door frame can be detected.

[0113] Implementation Method 4

[0114] This embodiment also proposes an anti-pinch sensing device. This embodiment is a further improvement on any one of embodiments one to three, the improvement being that the anti-pinch sensing device in this embodiment can abut against the external watertight seal.

[0115] This is an implementation method that utilizes the rubber sealing performance of conductive rubber strip 1. When the door and the door frame are closed, one of the door or the door frame is provided with conductive rubber strip 1 along the edge, and the other of the door or the door frame is provided with a sealing device. When the door is closed, the sealing strip on the door comes into contact with and is pressed against the conductive rubber strip 1 to form a seal.

[0116] Specifically, see Figure 5 As shown, when the door and door frame are closed, the conductive rubber strip 1 can abut against the external water-cutting seal provided on the door or door frame opposite to it.

[0117] The conductive rubber strip 1 is made of rubber material. Under compression, the rubber material has good airtightness, allowing it to abut against the external watertight seal on the door or door frame to produce a good airtight effect. Furthermore, when the door and door frame are closed, the external watertight seal creates a certain distance between the conductive rubber strip 1 and the door frame, preventing excessively high capacitance detection signals from direct contact and reducing false readings.

[0118] It is worth noting that the external water-tight sealing component can be made of rubber or other insulating composite materials.

[0119] Implementation Method 5

[0120] This embodiment also proposes an anti-pinch sensing device. This embodiment is a further improvement on embodiment one. The improvement is that the controller 2 is placed within the dry area of ​​the door or door frame and connected to the conductive rubber strip 1 through the lead wire 21, which reduces the interference of the controller 2 and the lead wire 21 from the external environment and effectively reduces the signal distortion rate.

[0121] Specifically, see Figure 2 As shown, the controller 2 is installed in the dry area of ​​the door or door frame. The lead wire 21 of the controller 2 passes through the wire hole provided in the dry area and is electrically connected to the conductive rubber strip 1. A waterproof rubber plug is provided on the wire hole.

[0122] The controller 2 is connected in communication with the host of the vehicle. The controller 2 responds to the start / stop signal of the host to start or stop the detection of the capacitor signal.

[0123] The controller 2, along with the conductive rubber strip 1, is installed within the dry area of ​​the door or door frame. The dry area is a physically isolated zone protected from rain and moisture. The controller 2's lead wire 21 passes through a hole in the dry area and is electrically connected to the conductive rubber strip 1. This lead wire 21 receives and transmits electrical signals detected by the conductive rubber strip 1. A hole is provided between the dry area and the outside world to allow the lead wire 21 to exit from within the dry area. A waterproof plug is installed in the hole to isolate the dry area containing the controller 2 from the external environment and to provide a seal. The controller 2 is communicatively connected to the conductive rubber strip 1. The capacitance signal detected by the conductive rubber strip 1 is transmitted to the controller 2 via the lead wire 21, and then transmitted out by the controller 2.

[0124] Controller 2 is communicatively connected to the main unit of the vehicle. This main unit can be the central control unit of the vehicle or a control unit dedicated to controlling and monitoring the anti-pinch sensing device. Controller 2 responds to the start / stop signal of the main unit to start or stop the detection of the capacitive signal. In other words, the start / stop of controller 2 can be achieved by controlling the main switch of the main unit.

[0125] See Figure 2 As shown, in an optional embodiment, the connection point between the lead wire 21 and the conductive rubber strip 1 can be arranged perpendicularly, and this perpendicular connection point is located at the wire passage hole in the dry area, so that the entire lead wire 21 is concealed within the dry area. A rubber plug is provided at the wire passage hole to prevent rainwater from entering. This arrangement maximizes the placement of the lead wire 21 within the dry area, effectively reducing the impact and interference of the external environment on the electrical signal transmission within the lead wire 21.

[0126] Implementation Method Six

[0127] Based on the aforementioned anti-pinch sensing device, this embodiment provides an anti-pinch sensing method to enable the anti-pinch sensing device to better achieve the anti-pinch function.

[0128] The anti-pinch sensing method includes the following steps:

[0129] Continuously acquire the capacitance value of conductive rubber strip 1;

[0130] When the difference between the capacitance value and the capacitance calibration value when the door is open is greater than the first preset value, the first alarm signal is issued.

[0131] Specifically: Step S1, continuously acquire the capacitance value of the conductive rubber strip 1. After the controller 2 is started, it begins to continuously acquire the capacitance signal of the conductive rubber strip 1, and performs real-time identification and monitoring after converting it into capacitance value data.

[0132] Step S2: When the difference between the capacitance value and the capacitance calibration value when the door is open is greater than a first preset value, a first alarm signal is issued. The capacitance value of the conductive rubber strip 1 is detected in real time. The difference between this capacitance value and the capacitance calibration value when the door is open indicates that an object is approaching the conductive rubber strip 1. When this difference is greater than the set first preset value, it indicates that the object is very close to or has already touched the conductive rubber strip 1, and a first alarm signal is issued at this time.

[0133] See Figure 6 As shown, the first preset value can be the difference between the capacitance value measured when the object approaches or touches the conductive rubber strip 1 and the capacitance calibration value when the door is open.

[0134] In step S2, the capacitance value in the open state is calibrated to obtain a calibrated capacitance value. This calibrated capacitance value is less than the capacitance value in the closed state. The current capacitance value is the capacitance value of the conductive rubber strip 1 detected in real time by the controller 2. The difference between the real-time detected capacitance value and the calibrated capacitance value can be used to measure the degree to which an object is close to the conductive rubber strip 1.

[0135] Alternatively, the anti-pinch sensing method also includes:

[0136] In response to the off signal, the capacitance value of conductive rubber strip 1 is obtained;

[0137] Determine whether the difference between the acquired capacitance value and the preset capacitance calibration value in the off state is greater than a second preset value; if the determination is yes, repeat the acquisition and determination steps, or issue a second alarm signal;

[0138] If the determination is negative, the obtained capacitance value will be used as the capacitance calibration value for this closed state.

[0139] S3. In response to the off signal, obtain the capacitance value of conductive rubber strip 1. For step S3:

[0140] The anti-pinch sensor receives a closing signal and acquires the capacitance value of the conductive rubber strip 1. When the door and door frame are closed, the vehicle's system sends a closing signal to the anti-pinch sensor. Upon receiving the closing signal, the anti-pinch sensor measures and acquires the capacitance value of the conductive rubber strip 1 as its capacitance calibration value in the closed state. When the measured capacitance value is less than the capacitance calibration value in the closed state, the conductive rubber strip 1 no longer detects the capacitance value of the corresponding door or door frame, indicating that the door is open. When the measured capacitance value suddenly increases from less than the capacitance calibration value in the closed state to greater than the capacitance calibration value in the closed state, it can be determined that the door is open and an object is approaching the door or door frame.

[0141] S4. Determine whether the difference between the obtained capacitance value and the preset capacitance calibration value in the off state is greater than the second preset value.

[0142] If the determination is yes, then repeat the acquisition and determination steps, or issue a second alarm signal;

[0143] If the determination is negative, the obtained capacitance value will be used as the capacitance calibration value for this closed state.

[0144] See Figure 6 As shown, the second preset value is used to determine the difference between the real-time measured capacitance value and the capacitance value measured when the door is closed. When the difference between the real-time detected capacitance value and the capacitance calibration value in the closed state exceeds the second preset value, it indicates that an object is approaching the conductive rubber strip 1. The capacitance value is continuously monitored as the object approaches the conductive rubber strip 1. If the object stops approaching the conductive rubber strip 1 and begins to move away, no second alarm signal is issued. If the object continues to approach the conductive rubber strip 1, and the difference between the measured capacitance value and the preset capacitance calibration value in the closed state exceeds the second preset value for a period of time, a second alarm signal is issued. If the object approaches the conductive rubber strip 1 and the difference between the measured capacitance value and the preset capacitance calibration value in the closed state exceeds the second preset value by a certain margin, it indicates that the object may be in direct contact with the conductive rubber strip 1, and in this case, a second alarm signal is also issued.

[0145] For the second alarm signal, the controller 2 transmits the second alarm signal. After receiving the second alarm signal, the system can issue an anti-pinch command. After receiving the signal, the motor controlling the door movement will control the door to stop moving or move in the reverse direction.

[0146] If the difference between the real-time detected capacitance value and the capacitance calibration value in the off state does not exceed the second preset value, the acquired capacitance value will be used as the capacitance calibration value for this off state. Considering the influence of the external environment, the capacitance calibration value in the off state may fluctuate. Therefore, it is necessary to periodically calibrate the capacitance value in the off state to improve the accuracy of the anti-pinch detection.

[0147] Optionally, in the step of continuously acquiring the capacitance value of the conductive rubber strip 1;

[0148] The capacitance value of conductive rubber strip 1 is obtained in a cycle of 80ms to 200ms.

[0149] When an object approaches the conductive rubber strip 1, the measured capacitance value begins to increase. At this time, the frequency of capacitance measurement of the conductive rubber strip 1 can be increased to improve the sensitivity of the anti-pinch detection. When the object moves away from the conductive rubber strip 1 or the door and door frame are closed, the measured capacitance value decreases or remains constant. The detection frequency can be reduced to achieve energy saving and extend the service life of the anti-pinch sensor.

[0150] Implementation Method Seven

[0151] This embodiment also proposes an anti-pinch sensing method. This embodiment is a further improvement of embodiment six. The improvement is that the closing signal is associated with other signals of the vehicle, and the locking signal, gear signal and speed signal are integrated to improve the accuracy of capacitance signal value detection.

[0152] Specifically, the shutdown signal includes any one or a combination of the following signals:

[0153] Lock signal;

[0154] Gear signal;

[0155] Speed ​​signal.

[0156] The locking signal is the signal emitted when a lock is formed between the door and the door frame. In this state, the conductive rubber strip 1 is stably positioned between the door and the door frame, and its detected capacitance value is relatively stable, with less interference from the external environment. Therefore, the locking signal can be used as a closing signal for the system's anti-pinch algorithm to determine the lock.

[0157] The gear position signal, indicating whether the vehicle is engaged or shifted to a driving gear such as forward, reverse, or neutral, signifies that the vehicle is in motion. In this state, the vehicle's door and frame are closed, and the conductive rubber strip 1 is stably positioned between the door and frame. Its detected capacitance value is relatively stable and less susceptible to external interference. Therefore, the gear position signal can be used as a closing signal for the system's anti-pinch algorithm.

[0158] The speed signal indicates that the vehicle is in motion and its speed has reached a preset value. This speed signal further ensures that the door and frame are in a closed state. Considering that some vehicles may not have their doors and frames closed initially due to human error during the initial travel, and that the doors and frames are usually closed once the vehicle reaches a certain speed, using the speed signal after the vehicle reaches a certain speed as the closing signal further ensures the accuracy of the anti-pinch algorithm.

[0159] Implementation Method Eight

[0160] Some vehicles are equipped with the ability to acquire rain and snow characterization information, which can be used to further determine the measured capacitance value, thereby improving the accuracy of anti-pinch determination in complex external environments. In view of this, this embodiment further improves upon embodiment six by acquiring rain and snow characterization information as a basis for determination in addition to determining capacitance using a second preset value, thus improving the method for determining capacitance value and enhancing the accuracy of the system's anti-pinch determination.

[0161] Specifically, in the step of determining whether the difference between the obtained capacitance value and the calibrated capacitance value in the calibrated off state is greater than a second preset value;

[0162] If the determination is yes, then further obtain the rain and snow characterization signals;

[0163] If rain and snow characteristics can be obtained, it is determined that the anti-pinch sensor device has failed due to rain and snow, and a third alarm signal is issued.

[0164] If the result is negative, a short circuit is determined to exist, and a second alarm signal will still be issued.

[0165] In severe weather conditions, rain and snow may cause the anti-pinch sensor to malfunction. If the difference between the acquired capacitance value and the calibrated capacitance value in the off state is greater than a second preset value, a rain / snow characteristic signal is further acquired. If a rain / snow characteristic signal is acquired, it indicates that the vehicle is in severe weather and affected by rain and snow. In rainy or snowy weather, the conductive rubber strip 1 is prone to creating a connection with the door or door frame due to liquid. Therefore, if a rain / snow characteristic signal is acquired, it is determined that the anti-pinch sensor has malfunctioned due to rain and snow. In severe environments, the anti-pinch sensor cannot function, and a third alarm signal is issued.

[0166] If the determination is negative, and the capacitance difference is less than the second preset value, it indicates that the conductive rubber strip 1 has been connected to the door or door frame, resulting in a short circuit, and a second alarm signal is issued.

[0167] Optionally, the rain / snow characterization signal includes any one or a combination of the following signals:

[0168] External temperature signal;

[0169] Rain gauge sensor signal;

[0170] Wiper start / stop signal;

[0171] Real-time weather signals for the current area.

[0172] The functional information corresponding to various rain and snow characteristic signals is as follows:

[0173] The external temperature signal is typically provided by the car's ambient temperature sensor, which is located on the front bumper bracket. This signal is primarily used to monitor the external ambient temperature and may also be involved in adjusting the interior temperature, heated seats, and steering wheel heating functions.

[0174] The rain sensor signal is provided by a rain sensor, which is usually installed on or near the windshield. It is used to detect rainfall and automatically adjust the wiping frequency of the wipers.

[0175] The windshield wiper start / stop signal controls the activation and deactivation of the wipers. This signal is generated by the vehicle's control system based on rain sensor signals or other inputs (such as manual operation).

[0176] Real-time weather signals for the current area may include information on multiple aspects such as temperature, humidity, and rainfall. This information is typically provided by weather monitoring stations outside the vehicle or by the vehicle's own sensors (such as ambient temperature sensors and rain sensors).

[0177] Rain and snow characterization signals can be achieved by using one or more of the above signals in combination to measure the characterization signal.

[0178] Implementation Method Nine

[0179] This embodiment also provides an anti-pinch sensing method. This embodiment is a further improvement based on embodiments six to eight. The improvement is that a third preset value is added as a judgment standard before the step of continuously acquiring the capacitance value of the conductive rubber strip 1, so as to determine whether the door is successfully opened and to calibrate the capacitance value in the open state, which further improves the accuracy of anti-pinch judgment.

[0180] Specifically, prior to the step of continuously acquiring the capacitance value of the conductive rubber strip 1, the method further includes:

[0181] In response to the door unlock signal, the capacitance value of conductive rubber strip 1 is obtained;

[0182] Determine whether the difference between the obtained capacitance value and the capacitance calibration value in the previous calibrated closed state is greater than a third preset value; if not, determine that the door has not been successfully opened.

[0183] If so, the obtained capacitance value will be used as the capacitance calibration value for this current on state;

[0184] Before issuing the first alarm signal, the capacitance calibration value of the current open state is used as the calibration value to be compared with the capacitance value of the current state.

[0185] A1. In response to the door unlocking signal, the controller 2 obtains the capacitance value of the conductive rubber strip 1. The anti-pinch sensor can respond to the door unlocking signal; when the door opens from the door frame, the controller 2 obtains the capacitance value of the conductive rubber strip 1.

[0186] A2. Determine whether the difference between the obtained capacitance value and the capacitance calibration value in the previously calibrated closed state is greater than a third preset value. The third preset value can be set as the difference between the capacitance calibration value in the previously calibrated closed state and the capacitance calibration value in the door-open state.

[0187] The difference between the capacitance calibration value in the previously calibrated closed state, i.e., the difference between the capacitance calibration values ​​when the door and door frame are closed, is used until the door and door frame open in response to the door unlock signal, at which point the capacitance value of conductive rubber strip 1 in step A1 is obtained. At this point, the difference between the measured capacitance value of conductive rubber strip 1 and the capacitance calibration value is compared with the third preset value:

[0188] If the determination is negative, it means that the measured capacitance value has not decreased to the capacitance value measured by the conductive rubber strip 1 when the door was previously open, indicating that the door has not been fully opened and the conductive rubber strip 1 can still detect the capacitance value of the nearby door or door frame.

[0189] If the determination is yes, it means that the measured capacitance value has decreased to the capacitance value measured by the small conductive rubber strip 1 in the previous open door state, indicating that the door has been opened from the door frame. The obtained capacitance value is used as the capacitance calibration value for this open state.

[0190] A3. Before issuing the first alarm signal, the capacitance calibration value of the current open state is used as the calibration value for comparison with the capacitance value of the current state. This calibration value is time-sensitive and its use as a calibration value can improve the accuracy of the system's anti-pinch detection.

[0191] Implementation Method Ten

[0192] This embodiment also provides an anti-pinch sensing method. This embodiment is a further improvement of embodiments six to nine. The improvement is that, based on the distance of the object from the conductive rubber strip 1, the period for obtaining the capacitance value of the conductive rubber strip 1 is reduced to improve the detection sensitivity.

[0193] Specifically, in the step of continuously acquiring the capacitance value of the conductive rubber strip 1;

[0194] When the difference between the capacitance value and the capacitance value when the door is open is greater than the fourth preset value but less than the first preset value, the cycle time for obtaining the capacitance value of the conductive rubber strip 1 is reduced.

[0195] S11. When the difference between the capacitance value and the capacitance value when the door is open is greater than the fourth preset value and less than the first preset value, reduce the cycle time for obtaining the capacitance value of the conductive rubber strip 1.

[0196] In a specific scenario, the first preset value can be the difference between the capacitance value measured when an object is very close to or touches the conductive rubber strip 1 and the capacitance value when the door is open. The fourth preset value can be the difference between the capacitance value measured on the conductive rubber strip 1 when the object has not yet approached it and the capacitance value when the door is open.

[0197] When the capacitance value measured by the conductive rubber strip 1 is greater than the fourth preset value and less than the first preset value, it indicates that an object has entered the sensing range of the conductive rubber strip 1. This reduces the cycle time for acquiring the capacitance value of the conductive rubber strip 1, increases the detection frequency, and thus improves the detection sensitivity of the anti-pinch sensor. This is beneficial for improving the safety of personnel entering and exiting vehicles, or reducing the damage rate of goods entering and exiting vehicles.

[0198] Optionally, in the step of continuously acquiring the capacitance value of the conductive rubber strip 1;

[0199] When the difference between the capacitance value and the capacitance value when the door is open is greater than the fourth preset value and less than the first preset value, the cycle time for obtaining the capacitance value of the conductive rubber strip 1 will be reduced to the range of 1ms to 20ms.

[0200] S12. When the difference between the capacitance value and the capacitance value when the door is open is greater than the fourth preset value and less than the first preset value, the period for acquiring the capacitance value of the conductive rubber strip 1 is reduced to the range of 1ms to 20ms. As an object enters the detection range of the conductive rubber strip 1 and gradually approaches it, the detection period is shortened to 1ms to 20ms. The capacitance measurement frequency of the conductive rubber strip 1 is significantly increased, and the sensitivity of the anti-pinch sensor is also improved. It can more sensitively detect approaching objects and transmit the corresponding signal to the system to issue the corresponding anti-pinch command.

[0201] Finally, it should be noted that those skilled in the art will understand that many technical details have been presented in the embodiments of this patent to facilitate a better understanding of the invention. However, even without these technical details and various variations and modifications based on the above embodiments, the technical solutions claimed in the claims of this patent can be substantially achieved. Therefore, in practical applications, various changes can be made to the above embodiments in form and detail without departing from the spirit and scope of this patent.

Claims

1. An anti-pinch sensing device, characterized in that, include: A conductive rubber strip is used to be installed on one of a door or a door frame and to measure the capacitance value of an object near the conductive rubber strip. When the door and the door frame are closed, there is a gap between the conductive rubber strip and the door or door frame opposite it. The controller is communicatively connected to the conductive rubber strip and is used to convert the capacitance signal transmitted by the conductive rubber strip into a digital signal and transmit it.

2. The anti-pinch sensing device according to claim 1, characterized in that, The conductive rubber strip includes: A conductive rubber layer, which is directly exposed to the air, is used to measure the capacitance of objects that are close to or in direct contact with the conductive rubber strip.

3. The anti-pinch sensing device according to claim 1, characterized in that, The conductive rubber strip includes: Conductive rubber layer; An insulating rubber layer is wrapped around the conductive rubber layer, and the conductive rubber layer is capable of measuring the capacitance of an object in contact with the insulating rubber layer.

4. The anti-pinch sensing device according to claim 2 or 3, characterized in that, The resistance of the conductive rubber layer is in the range of 300Ω to 4KΩ.

5. The anti-pinch sensing device according to claim 1, characterized in that, When the door and the door frame are closed, the gap between the conductive rubber strip and the door or door frame opposite it is greater than or equal to 3mm.

6. The anti-pinch sensing device according to claim 1, characterized in that, When the door and the door frame are closed, the conductive rubber strip can abut against the external water-cutting seal provided on the door or door frame opposite to it.

7. The anti-pinch sensing device according to claim 1, characterized in that, The controller is installed in the dry area of ​​the door or door frame. The lead wire of the controller passes through the wire hole provided in the dry area and is electrically connected to the conductive rubber strip. A waterproof rubber plug is provided on the wire hole. The controller is communicatively connected to the host of the vehicle, and the controller responds to the start / stop signal of the host to start or stop the detection of the capacitor signal.

8. A door of a vehicle, characterized in that, The door of the vehicle is provided with an anti-pinch sensing device as described in any one of claims 1 to 7.

9. A door frame for a vehicle, characterized in that, The door frame of the vehicle is provided with an anti-pinch sensing device as described in any one of claims 1 to 7.

10. A vehicle, characterized in that, The vehicle is provided with the door as described in claim 8, or the vehicle is provided with the door frame as described in claim 9.

11. A method for preventing pinching, characterized in that, Includes the following steps: Continuously acquire the capacitance value of the conductive rubber strip; When the difference between the capacitance value and the capacitance calibration value when the door is open is greater than a first preset value, a first alarm signal is issued.

12. The anti-pinch sensing method according to claim 11, characterized in that, Also includes: In response to the off signal, the capacitance value of the conductive rubber strip is obtained; Determine whether the difference between the obtained capacitance value and the preset capacitance calibration value in the off state is greater than a second preset value; If the determination is yes, then repeat the acquisition and determination steps, or issue a second alarm signal; If the determination is negative, the obtained capacitance value will be used as the capacitance calibration value for this closed state.

13. The anti-pinch sensing method according to claim 12, characterized in that, The shutdown signal includes any one or a combination of the following signals: Lock signal; Gear signal; Speed ​​signal.

14. The anti-pinch sensing method according to claim 12, characterized in that, In the step of determining whether the difference between the obtained capacitance value and the calibrated capacitance value in the off state is greater than the second preset value; If the determination is yes, then further obtain the rain and snow characterization signals; If rain and snow characteristics can be obtained, it is determined that the anti-pinch sensor device has failed due to rain and snow, and a third alarm signal is issued. If the result is negative, a short circuit is determined to exist, and a second alarm signal will still be issued.

15. The anti-pinch sensing method according to claim 14, characterized in that, The rain and snow characterization signal includes any one or a combination of the following signals: External temperature signal; Rain gauge sensor signal; Wiper start / stop signal; Real-time weather signals for the current area.

16. The anti-pinch sensing method according to claim 11, characterized in that, Prior to the step of continuously acquiring the capacitance value of the conductive rubber strip, the method further includes: In response to the door unlock signal, the capacitance value of the conductive rubber strip is obtained; Determine whether the difference between the obtained capacitance value and the capacitance calibration value in the previous calibrated closed state is greater than a third preset value; if not, determine that the door has not been successfully opened. If so, the obtained capacitance value will be used as the capacitance calibration value for this current on state; Before issuing the first alarm signal, the capacitance calibration value of the current open state is used as the calibration value to be compared with the capacitance value of the current state.

17. The anti-pinch sensing method according to claim 11, characterized in that, In the step of continuously acquiring the capacitance value of the conductive rubber strip; The capacitance value of the conductive rubber strip is obtained in a period of 80ms to 200ms.

18. The anti-pinch sensing method according to claim 11, characterized in that, In the step of continuously acquiring the capacitance value of the conductive rubber strip; When the difference between the capacitance value and the capacitance value when the door is open is greater than the fourth preset value and less than the first preset value, the cycle time for obtaining the capacitance value of the conductive rubber strip is reduced.

19. The anti-pinch sensing method according to claim 18, characterized in that, In the step of continuously acquiring the capacitance value of the conductive rubber strip; When the difference between the capacitance value and the capacitance value when the door is open is greater than the fourth preset value and less than the first preset value, the periodic time for obtaining the capacitance value of the conductive rubber strip will be reduced to the range of 1ms to 20ms.

20. A computer program product, characterized in that, When the computer program in the computer program product is executed by a processor, it can perform the steps as described in any one of claims 11 to 19.

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