Signal generation method, signal generation device, and safety restraint system

Abstract

The present invention discloses a signal generation method for generating a signal representing the bound state of an object. The method comprises the following steps: obtaining a sensing signal from a sensing device disposed on the object to be bound and / or the binding device; generating a state signal representing the bound state of the object according to the dynamic characteristic parameters corresponding to the sensing signal and a set binding threshold. The embodiment of the present invention can at least check the bound state of the object to enhance the protection effect of the binding device on the object to be bound.

Description

Technical Field

[0001] The present invention relates to a signal generation method, a signal generation device, and a safety restraint system. Background Art

[0002] In daily life and work, people have diverse requirements for restraining objects. The objects include but are not limited to humans, animals, or general items, and the scenarios of the restraining requirements include but are not limited to: the safety restraint of infants and children during transportation in baby carriages or vehicles, the traction restraint of domestic pets or livestock, the local restraint of patients during medical treatment, the insurance restraint of amusement park visitors when riding large amusement facilities, the safety restraint of motor vehicle passengers, and the fixed restraint of heavy objects during transportation, etc.

[0003] The above-mentioned restraint of objects is mostly used to ensure the safety of the restrained objects. In some scenarios, the restraint is strictly enforced as a mandatory requirement - a driver should fasten the seat belt as required during driving a motor vehicle, otherwise they will be punished for violating relevant traffic regulations; however, in some other scenarios where restraint is required, the restraint requirement is not enforced, which easily leads to the corresponding object disengaging from the restrained position and causing safety accidents - an untethered pet or livestock is likely to startle or injure pedestrians on the road, especially children.

[0004] It can be seen from this that in scenarios where there is a restraint requirement, especially when there is no relevant regulation to enforce it, the fulfillment of the restraint requirement lacks sufficient reminder and guarantee. In addition, the long-term safe operation will gradually reduce people's vigilance and sense of responsibility in fulfilling the restraint requirement, easily leading to the wrong concept that the restraint requirement is a redundant requirement, resulting in the occurrence of behaviors of untimely and insufficient fulfillment of the restraint requirement, and further causing safety accidents.

[0005] During the process of fulfilling the restraint requirement, the restraint form of the restraint device on the object also affects the restraint state of the object. Generally speaking, the restraint effect on the object is divided into tight restraint and loose restraint according to whether the object can move relative to the restraint device. Typical tight restraints include: the restraint effect of a fixing device on a heavy object during transportation, the restraint effect of a medical fixing device on a patient's local area, etc.; correspondingly, typical loose restraints include: the restraint effect of a seat belt on a driver and a passenger, the restraint effect of a pet leash on a pet or livestock, the restraint effect of a safety helmet or a seat belt on a construction worker during production operations, the restraint effect of a safety seat and related accessories on an infant or child, etc.

[0006] In the above-mentioned loose restraint scenario, it is often necessary to ensure the safety and comfort of the restrained object at the same time. Taking the restraint of infants and children as an example, during the process of an infant or child traveling in a motor vehicle through a child seat, the child seat should fully protect the infant or child through the restraint effect, strictly restricting its movement range not to exceed the protection range of the child seat. At the same time, the tightness of the restraint needs to be appropriately maintained within the comfort range of the infant or child to avoid the infant or child crying or being injured due to excessive restraint. In addition, comfort is also an important factor affecting the subjective willingness of the restrained person to have the restraint protection. For some motor vehicle drivers or passengers, an uncomfortable seat belt may reduce their willingness to wear the seat belt actively, even when there are mandatory regulations in traffic laws.

[0007] While paying attention to the comfort of loose restraint, it is also necessary to pay special attention to the object being restrained in a reasonable and safe manner. Specifically, although loose restraint cannot ensure the full and proper fitting of the restraint device to the restrained object, it is necessary to ensure that the key restraint points are restrained on the object in a reasonable manner, so as to produce sufficient protection effect on the restrained object in the event of a possible safety accident. Taking the wearing of a safety helmet as an example, the protection of the human head by a safety helmet is a typical loose restraint scenario, that is, the safety helmet and the human head only contact each other at some positions, and there are often sufficient gaps at other positions between the safety helmet and the human head. At this time, if the fastening strap used for restraint is not correctly fastened from the cheeks to the lower jaw, the safety helmet will be extremely likely to fall off and cannot protect the human head from the injury of falling objects from above.

[0008] Existing restraint devices lack the inspection and reminder of the restraint state, and it is difficult to detect the restraint state such as whether the restraint is fulfilled and whether it is fulfilled in a qualified manner at the key restraint points in the scenario of mandatory restraint, so as to be unable to remind the personnel implementing the restraint, making it difficult for the restraint device to play its due role. Summary of the Invention

[0009] At least one object of the present invention is to propose a signal generation method, a signal generation device and a safety restraint system, which can check the restraint state of an object to strengthen the protection effect of the restraint device on the restrained object.

[0010] The preferred technical solutions among the many technical solutions provided by the present invention can produce many technical effects as described in detail below.

[0011] To achieve the above object, the present invention provides the following technical solutions:

[0012] The present invention provides a signal generation method for generating a signal representing the restraint state of an object, and the method has the following steps:

[0013] Obtain a sensing signal from a sensing device provided on the restrained object and / or the restraint device;

[0014] Generate a status signal indicating the restraint state of the object according to the dynamic characteristic parameters corresponding to the sensing signal and a set restraint threshold.

[0015] As an optimization of any of the technical solutions provided in the foregoing or following of the present invention or any optimized technical solution, the sensing device includes an induction switch, the dynamic characteristic parameter includes a level parameter, and before obtaining the sensing signal, the method further includes:

[0016] When the induction switch senses the contact or non-contact of an object, output the corresponding level parameter as the sensing signal respectively.

[0017] As an optimization of any of the technical solutions provided in the foregoing or following of the present invention or any optimized technical solution, the method further includes:

[0018] Count the number of times of obtaining the sensing signal according to a first period, and when the counting result exceeds a first counting threshold, implement the step of generating the status signal indicating the restraint state of the object.

[0019] As an optimization of any of the technical solutions provided in the foregoing or following of the present invention or any optimized technical solution, the step of generating the status signal indicating the restraint state of the object further includes:

[0020] Compare the level parameter with a first set level value; and

[0021] When the level parameter is higher than the first set level value, generate a status signal indicating good restraint state of the object, and when it is lower than or equal to the first set level value, generate a status signal indicating poor restraint state of the object.

[0022] As an optimization of any of the technical solutions provided in the foregoing or following of the present invention or any optimized technical solution, there is at least one induction switch, which can generate at least one level parameter, and the step of generating the status signal indicating the restraint state of the object further includes:

[0023] Compare each of the at least one level parameter with a second set level value; and

[0024] When all of the at least one level parameter are higher than the second set level value, generate a status signal indicating good restraint state of the object, and when any of the at least one level parameter is lower than or equal to the second set level value, generate a status signal indicating poor restraint state of the object.

[0025] As an optimization of any of the technical solutions provided before or after the present invention or any optimized technical solution, the sensing device includes a pressure sensor, the dynamic characteristic parameter includes a pressure-time change parameter, and before obtaining the sensing signal, the method further includes:

[0026] The pressure sensor outputs a continuous sensing signal regarding the pressure-time change parameter.

[0027] As an optimization of any of the technical solutions provided before or after the present invention or any optimized technical solution, the method further includes:

[0028] Integrate the pressure-time change parameter with respect to time according to a second period to obtain a first integral value, and when the first integral value is greater than a first set work value, implement the step of generating a state signal representing the bound state of the object.

[0029] As an optimization of any of the technical solutions provided before or after the present invention or any optimized technical solution, the step of generating a state signal representing the bound state of the object includes:

[0030] Perform a difference calculation between the pressure-time change parameter and the pressure-time change parameter within the previous second period to obtain a calibrated pressure-time change parameter.

[0031] As an optimization of any of the technical solutions provided before or after the present invention or any optimized technical solution, after obtaining the calibrated pressure-time change parameter, the step of generating a state signal representing the bound state of the object further includes:

[0032] Integrate the calibrated pressure-time change parameter with respect to time according to a third period to obtain a second integral value;

[0033] Compare the second integral value with a second set work value; and

[0034] When the second integral value is greater than the second set work value, generate a state signal indicating a good bound state of the object, and when the second integral value is less than or equal to the second set work value, generate a state signal indicating a poor bound state of the object.

[0035] As an optimization of any of the technical solutions provided before or after the present invention or any optimized technical solution, after obtaining the calibrated pressure-time change parameter, the step of generating a state signal representing the bound state of the object further includes:

[0036] Calculate the difference between the maximum pressure and the minimum pressure of the calibrated pressure-time change parameter within the fourth period according to a fourth period;

[0037] Compare the difference with a first set amplitude; and

[0038] When the difference is greater than the first set amplitude, generate a status signal indicating a poor object restraint state, and when the difference is less than or equal to the first set amplitude, generate a status signal indicating a good object restraint state.

[0039] As an optimization of any of the technical solutions provided in the foregoing or subsequent text of the present invention or any optimized technical solution, there are at least two pressure sensors, which can generate at least two pressure-time change parameters. The step of generating a status signal indicating the object restraint state includes:

[0040] Perform an addition operation on the at least two pressure-time change parameters;

[0041] Integrate the addition result with respect to time to obtain a third integral value;

[0042] Compare the third integral value with a third set work value; and

[0043] When the third integral value is greater than the third set work value, generate a status signal indicating a good object restraint state, and when it is less than or equal to the third set work value, generate a status signal indicating a poor object restraint state.

[0044] The present application also provides a signal generating device configured to perform all steps of any of the signal generating methods described above.

[0045] The present application also provides a safety restraint system, including:

[0046] A restraint device for restraining an object;

[0047] A sensing device disposed on the object to be restrained and / or the restraint device;

[0048] The signal generating device according to the foregoing; and

[0049] An alarm device communicatively connected to the signal generating device and capable of outputting an alarm message according to the received status signal indicating the object restraint state.

[0050] As an optimization of any of the technical solutions provided in the foregoing or subsequent text of the present invention or any optimized technical solution, the restraint device includes:

[0051] A cap body;

[0052] A lace disposed on the cap body for restraining the cap body at a set position on the head;

[0053] The sensing device includes:

[0054] A pressure sensor or a sensing switch is provided on the cap body and / or the lacing for measuring the pressure between the head and the cap body and / or the lacing.

[0055] As an optimization of any of the technical solutions provided in the foregoing or following text of the present invention or any optimized technical solution, the sensing switch includes a capacitive contact sensing switch or a flexible film switch.

[0056] As an optimization of any of the technical solutions provided in the foregoing or following text of the present invention or any optimized technical solution, the safety restraint system further includes:

[0057] A Bluetooth transmitter, provided on the cap body and / or the lacing, communicatively connected to the signal generating device for transmitting a status signal indicating the object restraint state; and

[0058] A Bluetooth receiver, communicatively connected to the alarm device for receiving the status signal.

[0059] As an optimization of any of the technical solutions provided in the foregoing or following text of the present invention or any optimized technical solution, the alarm device includes:

[0060] A warning light configured to emit a red flashing light when receiving the status signal indicating an unsatisfactory object restraint state and not emit light or emit a green light when receiving the status signal indicating a satisfactory object restraint state; and

[0061] A buzzer piece or a speaker configured to emit a warning sound effect when receiving the status signal indicating an unsatisfactory object restraint state and not make a sound when receiving the status signal indicating a satisfactory object restraint state.

[0062] As an optimization of any of the technical solutions provided in the foregoing or following text of the present invention or any optimized technical solution, the sensing switch is at least one and is provided on the cap body or the lacing, and the safety restraint system is configured to:

[0063] Calculate the sensing signals of the sensing switch and trigger the alarm device when the sensing signal of any one of the sensing switches corresponds to the status signal indicating an unsatisfactory object restraint state.

[0064] As an optimization of any of the technical solutions provided in the foregoing or following text of the present invention or any optimized technical solution, the pressure sensor is at least a pair and is symmetrically provided on the cap body and / or the lacing, and the safety restraint system is configured to:

[0065] Sum the sensing signals of each pair of the pressure sensors after weighting and generate a status signal indicating the object restraint state based on the result of the summation calculation.

[0066] As an optimization of any of the technical solutions provided before or after the present invention or any optimized technical solution, the device for generating a signal representing the bound state of an object is further configured to:

[0067] Based on the degree of tightness of the cap body and / or the tie belt on the head at the position where each pair of pressure sensors is arranged on the cap body and / or the tie belt, there are different set binding thresholds.

[0068] As an optimization of any of the technical solutions provided before or after the present invention or any optimized technical solution, the safety binding system further includes:

[0069] An intelligent terminal with a Bluetooth receiver, which is capable of emitting image information and / or voice information indicating an abnormal binding state of the safety binding system based on the state signal representing the bound state of the object received by the Bluetooth receiver.

[0070] As an optimization of any of the technical solutions provided before or after the present invention or any optimized technical solution, the intelligent terminal is further configured to:

[0071] When the safety binding system binds an object and the intelligent terminal is located more than a set distance away from the Bluetooth transmitter, based on the received signal, emit image information and / or voice information indicating that the wearer of the safety binding system has been left behind.

[0072] As an optimization of any of the technical solutions provided before or after the present invention or any optimized technical solution, the intelligent terminal is capable of playing a preset audio file or video file, and the intelligent terminal is further configured to:

[0073] Play the audio file or video file when receiving the state signal indicating that the object is in a good bound state, and stop playing the audio file or video file when receiving the state signal indicating that the object is in a bad bound state.

[0074] As an optimization of any of the technical solutions provided before or after the present invention or any optimized technical solution, the intelligent terminal can be locked to prohibit the operation behavior of the user, and the intelligent terminal is further configured to:

[0075] Release the locking operation when receiving the state signal indicating that the object is in a good bound state, and perform the locking operation when receiving the state signal indicating that the object is in a bad bound state.

[0076] Based on the above technical solutions, the embodiments of the present invention can at least check the bound state of an object to enhance the protection effect of the binding device on the bound object. Brief Description of the Drawings

[0077] The accompanying drawings described herein are used to provide a further understanding of the present invention, and form a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, and do not constitute an improper limitation to the present invention. In the drawings:

[0078] Figure 1 is a schematic structural diagram of a safety restraint system provided by an embodiment of the present invention when applied to head protection;

[0079] Figure 2 is a schematic flowchart of a signal generation method provided by an embodiment of the present invention;

[0080] Figure 3 is a schematic flowchart of another signal generation method provided by an embodiment of the present invention;

[0081] Figure 4 is a schematic flowchart of another signal generation method provided by an embodiment of the present invention;

[0082] Figure 5 is a schematic connection diagram of a safety restraint system provided by an embodiment of the present invention;

[0083] Figure 6 is a schematic connection diagram of another safety restraint system provided by an embodiment of the present invention;

[0084] Figure 7 is a continuous sensing signal waveform diagram of the pressure-time change parameter sensed by the sensing device in the signal generation method provided by an embodiment of the present invention. Detailed implementation manners

[0085] The following can refer to the accompanying drawings and the text content to understand the content of the present invention and the differences between the present invention and the prior art. The technical solutions of the present invention (including the preferred technical solutions) will be further described in detail below by way of the accompanying drawings and by listing some optional embodiments of the present invention.

[0086] It should be noted that: any technical feature or any technical solution in this embodiment is one or several of a variety of optional technical features or optional technical solutions. For the sake of simplicity of description, all alternative technical features and alternative technical solutions of the present invention cannot be exhausted in this document, nor is it convenient to emphasize that each implementation manner of each technical feature is one of the optional multiple implementation manners. Therefore, those skilled in the art should know that: any technical means provided by the present invention can be replaced, or any two or more technical means or technical features provided by the present invention can be combined with each other to obtain a new technical solution.

[0087] Any technical feature and any technical solution within this embodiment do not limit the protection scope of the present invention. The protection scope of the present invention should include any alternative technical solutions that can be conceived by those skilled in the art without creative efforts, as well as new technical solutions obtained by combining any two or more technical means or technical features provided by the present invention by those skilled in the art.

[0088] The present invention provides a signal generation method for generating a signal representing the bound state of an object. The method comprises the following steps:

[0089] Obtain a sensing signal from a sensing device disposed on the object to be bound and / or the binding device;

[0090] Generate a state signal representing the bound state of the object according to the dynamic characteristic parameters corresponding to the sensing signal and a set binding threshold.

[0091] The bound state of the object includes three states: the object is well bound, poorly bound, or unbound. Generally speaking, the object being well bound is the bound state that the binder hopes to obtain, while being poorly bound and unbound are harmful in certain specific situations. Therefore, it is necessary to evaluate the bound state for specific application scenarios where harmful results are likely to occur due to the two bound states of being poorly bound and unbound, and send the obtained bound state to a specific device receiving the signal, such as an alarm device, in the form of a signal, so as to avoid the occurrence of harmful results.

[0092] To obtain the bound state of the object, it is necessary to first set a corresponding sensing device on the object to be bound and / or the binding device, so as to convert the physical state of the bound state into dynamic characteristic parameters that can be converted into signals. Typical sensing devices include devices for converting physical quantities such as pressure, distance, and acceleration. When they are disposed on the object to be bound and / or the binding device, the magnitude of the force and / or the size of the gap between the object to be bound and the binding device can be evaluated through the interaction or movement between the object to be bound and / or the binding device, thereby estimating the bound state of the object to be bound.

[0093] After the sensing device emits a sensing signal, the method provided by the present invention further receives the sensing signal and uses the corresponding dynamic characteristic parameter as an object for evaluating the bound state of the object. Specifically, when the sensing signal measured by the sensing device is related to the contact state of the object, the corresponding dynamic characteristic parameter may include a level value; when the sensing signal measured by the sensing device is a pressure signal, the corresponding dynamic characteristic parameter may be a pressure-time dynamic parameter; and when the sensing signal measured by the sensing device is a distance signal, the corresponding dynamic characteristic parameter may include a voltage value representing the distance. For the dynamic characteristic parameters obtained from different types of sensing signals, the method provided in this application can perform subsequent operations on the dynamic characteristic parameters based on electricity through a calculation circuit, thereby generating a state signal representing the bound state of the object.

[0094] As an optimization of any of the technical solutions or any optimized technical solutions provided in the foregoing or subsequent paragraphs of the present invention, the sensing device includes an induction switch, and the dynamic characteristic parameter includes a level parameter. Before obtaining the sensing signal, the method further includes:

[0095] When the induction switch senses that there is an object in contact or no object in contact, it outputs the corresponding level parameter as a sensing signal.

[0096] The induction switch can detect whether an object is in contact with itself by applying principles such as infrared induction, microwave induction, ultrasonic induction, piezoelectric induction, electromagnetic induction, or capacitive induction. In this application, the induction switch can be selected as a contact induction switch or a thin film induction switch. For example, a capacitive touch induction switch, a resistive contact induction switch, a flexible thin film switch, a rigid thin film switch, a planar thin film switch, or a convex thin film switch can be selected to output the corresponding sensing signal when the sensing device senses that there is an object in contact.

[0097] In addition, the pressure sensor can be selected as a trigger sensor. For example, a capacitive touch induction switch, a flexible thin film switch, or a thin film pressure sensor can be selected to output the corresponding sensing signal when the sensed pressure exceeds the first pressure threshold. Among them, the flexible thin film switch has a low implementation cost. However, due to its low sensitivity, it is difficult to meet the requirements for the sensitivity of the pressure sensor; both the capacitive touch induction switch and the thin film pressure sensor have high sensitivity, and the capacitive touch induction switch has a lower implementation cost than the thin film pressure sensor. Therefore, it is the preferred implementation method of the pressure sensor.

[0098] Further, the inductive switch can output different high and low level parameters according to whether an object touches it. Typically, the inductive switch will emit a high-level parameter when an object touches it, and can output a low-level parameter or no level parameter when no object touches it. The above high level, low level or no level parameter can all be used as a sensing signal to generate a status signal indicating the bound state of the object.

[0099] As an optimization of any of the technical solutions provided in the foregoing or following of the present invention or any optimized technical solution, the method further includes:

[0100] Count the number of times of obtaining the sensing signal according to the first period, and when the counting result exceeds the first counting threshold, implement the step of generating the status signal indicating the bound state of the object.

[0101] The setting of the first period and the counting of the number of times of obtaining the sensing signal within the first period can help the method provided by the present invention to identify the scenario where the object is not bound. Specifically, whenever the inductive switch senses the base of the object, it outputs in the form of a sensing signal. And within the first period, when the count of the sensing signal does not exceed the first counting threshold, it means that the inductive switch disposed on the binding device and / or the bound object may be actuated by a movement other than the binding form, such as the action of picking up the seat belt in a motor vehicle during cleaning, etc., and thus the operation of generating the status signal indicating the bound state of the object is not implemented; correspondingly, within the first period, when the count of the sensing signal exceeds the first counting threshold, it means that whether it is poorly bound or well bound, the object is bound by the binding device at this time, and the subsequent signal binding step for the bound state of the object should be performed.

[0102] The length of the first period and the setting of the first counting threshold can be comprehensively determined according to various factors such as the natural frequencies of the bound object and the binding device itself, the natural frequency of the set environment, and the possible movements. For example, when the binding device is a seat belt and is placed in a motor vehicle, the first period and the first counting threshold can be comprehensively determined according to parameters such as the tightness between the seat belt and the seat, the body types of the bound objects, i.e., the driver or passenger, and the movement speed of the motor vehicle. In addition, the setting of the length of the first period and the first counting threshold can also include the self-attributes of the inductive switch, for example, the sensitivity of the inductive switch, that is, the quotient obtained by dividing the first period by the first technical threshold should not be higher than the sensitivity of the inductive switch.

[0103] As an optimization of any of the technical solutions provided in the foregoing or following of the present invention or any optimized technical solution, the step of generating the status signal indicating the bound state of the object further includes:

[0104] Compare the level parameter with a first set level value; and

[0105] When the level parameter is higher than the first set level value, generate a status signal indicating a good state of the object restraint, and when it is lower than or equal to the first set level value, generate a status signal indicating a poor state of the object restraint.

[0106] Generally speaking, the level value obtained by the induction switch can be used to evaluate the pressure exerted on the object. During the evaluation process, the level parameter is compared with the first set level value. When the level parameter is higher than the first set level value, a status signal indicating a good state of the object restraint is generated, and when it is lower than or equal to the first set level value, a status signal indicating a poor state of the object restraint is generated.

[0107] In addition, since the state of whether the induction switch is in contact with the object is converted into a level value, a comparison circuit or a comparator in the general sense can quickly and accurately evaluate the relative magnitude relationship between the level parameter and the first set level value.

[0108] As an optimization of any of the technical solutions provided in the foregoing or following of the present invention or any optimized technical solution, the induction switch is at least one and can generate at least one level parameter. The step of generating the status signal indicating the state of the object restraint further includes:

[0109] Compare each of the at least one level parameter with a second set level value; and

[0110] When all of the at least one level parameter are higher than the second set level value, generate a status signal indicating a good state of the object restraint, and when any of the at least one level parameter is lower than or equal to the second set level value, generate a status signal indicating a poor state of the object restraint.

[0111] When the number of the induction switches is unique, the evaluation of the restraint state of the restrained object depends on the unique induction switch, that is, depends on the level parameter output by the unique induction switch, and a second set level value is preset between the output high level value and the low level value / zero level value thereof, so as to realize the output of the status signal indicating the state of the object restraint through comparison operations.

[0112] When the number of the induction switches is not unique, these induction switches are usually arranged in each area where the restraint state needs to be strictly monitored. Therefore, it is necessary to rely on all the induction switches to calculate the status signals. Taking tight restraint as an example, usually the restraint device restrains the object to be restrained in a way of simultaneous multi-point contact. To ensure the accurate evaluation of the restraint state, the induction switches are respectively arranged in each area where the restraint device contacts the object to be restrained. In this case, it can be conceived that only when the level parameters output by all the induction switches correspond to a good restraint state, does it mean that the object is well restrained as a whole; while when the level parameters output by any one or more induction switches correspond to a poor restraint state, it means that the restrained object is not well restrained at one or more contact points.

[0113] Further, as an optimization of any technical solution or any optimized technical solution provided in the foregoing or following of the present invention, the sensing device includes a pressure sensor, the dynamic characteristic parameter includes a pressure-time change parameter, and before obtaining the sensing signal, the method further includes:

[0114] The pressure sensor outputs a continuous sensing signal about the pressure-time change parameter.

[0115] Generally, the continuous sensing signal about the pressure-time change parameter obtained by the pressure sensor is in the form of a waveform diagram. The horizontal axis of the waveform diagram is time, and the vertical axis is pressure; the amplitude of the waveform represents the pressure difference between the pressure peak and valley values measured by the pressure sensor; when the waveform fluctuates up and down about a certain pressure value, this pressure value represents the average pressure received by the pressure sensor, or the pressure value received by the pressure sensor when it is static; further, the integral of the waveform diagram of the pressure-time change parameter about the horizontal axis represents the work done by the restraint device and / or the object to be restrained on the pressure sensor.

[0116] Based on the continuous sensing signal of the above-mentioned pressure-time change parameter, the method provided by the present invention can more intuitively master the stress state of the pressure sensor and can thereby make a more accurate judgment on the restraint state of the object. In addition, by performing appropriate mathematical operations on the continuous sensing signal in the form of a waveform, the method provided by the present invention can accurately judge different restraint states based on different waveform change trends.

[0117] Specifically, when the fluctuation amplitude of the continuous sensing signal of the pressure-time change parameter is small, and the pressure value related to the fluctuation is close to the horizontal axis, it represents that the pressure sensor is not affected by external pressure or the pressure influence is small, further indicating that the object to which the pressure sensor is set and / or the restraint device are in a free state at this time, that is, the object is in an unrestrained state; when the fluctuation amplitude of the continuous sensing signal of the pressure-time change parameter is large, and the pressure value related to the fluctuation deviates from the horizontal axis, it indicates that the object to which the pressure sensor is set and / or the restraint device are in a compressed state at this time, that is, the object is in a restrained state.

[0118] Further, as an optimization of any technical solution or any optimized technical solution provided in the foregoing or subsequent text of the present invention, the method further includes:

[0119] Performing an integral operation on the pressure-time change parameter with respect to time according to a second period to obtain a first integral value, and when the first integral value is greater than a first set work value, implementing the step of generating a state signal representing the restraint state of the object.

[0120] The setting of the second period, the integral operation performed on the pressure-time change parameter with respect to time, and the comparison of the first integral value with the first set work value can help the method provided by the present invention more accurately identify the scenario where the object is not restrained.

[0121] It can be imagined that when the pressure sensor does not measure pressure, the integral value obtained by performing an integral operation on the pressure-time change parameter with respect to time is usually relatively small, and even due to the possible fluctuation of the pressure-time change parameter with respect to the horizontal axis, an integral value close to zero is obtained; when the pressure sensor measures pressure, the integral value obtained by performing an integral operation on the pressure-time change parameter with respect to time is usually large and generally does not fluctuate with respect to the horizontal axis, but fluctuates with respect to a specific pressure value. Based on this, using the integral value as a standard for evaluating the restraint state corresponding to the pressure-time change parameter measured by the pressure sensor is objective and accurate. Moreover, since the integral operation can be achieved by means of existing integral operation circuits or integrators, the implementation difficulty and implementation cost are also relatively low.

[0122] For the integral operation, the analog signal has higher resolution and accuracy than the digital signal. Therefore, the pressure-time change parameter obtained by the pressure sensor here is preferably a continuous waveform image, that is, output in the form of an analog signal. Correspondingly, if the integral operation is not necessary and the digital signal format can achieve relatively high precision, the pressure-time change parameter measured by the pressure sensor can be further subjected to analog-to-digital conversion by an A / D conversion module to facilitate subsequent comparison operations and logical operations.

[0123] The selection of the second period and the first set work value is similar to the aforementioned setting of the length of the first period and the first counting threshold, which will not be repeated here.

[0124] Further, as an optimization of any technical solution or any optimized technical solution provided above or below in the present invention, the step of generating a state signal indicating the restraint state of the object includes:

[0125] The pressure-time variation parameter is calculated by difference with the pressure-time variation parameter in the previous second period, so as to obtain a calibrated pressure-time variation parameter.

[0126] By performing a difference calculation on the pressure-time variation parameters of two consecutive cycles, the influence of the natural frequency of the pressure sensor itself or the environment in which it is located on the accuracy of the measured dynamic characteristic parameters can be eliminated relatively simply and accurately. In particular, after the pressure sensor senses the pressure change, the waveform measured by the pressure sensor is subtracted from the waveform before the pressure change is sensed, and a relatively pure image of the pressure-time variation parameters caused by the external pressure change is obtained, so that in the subsequent calculation process, the accumulated error that may be caused by the system error can be eliminated as much as possible.

[0127] Further, as an optimization of any technical solution or any optimized technical solution provided above or below the present invention, after obtaining the calibration pressure-time variation parameter, the step of generating a state signal indicating the restrained state of the object further includes:

[0128] Integrating the calibration pressure-time variation parameter with respect to time according to a third period to obtain a second integral value;

[0129] comparing the second integral value with a second set work value; and

[0130] When the second integral value is greater than the second set work value, a state signal indicating that the object restraint state is good is generated, and when the second integral value is less than or equal to the second set work value, a state signal indicating that the object restraint state is bad is generated.

[0131] Different from integrating the pressure-time change parameter with respect to time in the second period to obtain the first integral value, the second integral value obtained by integrating the calibrated pressure-time change parameter with respect to time in the third period is a net integral of the external pressure received by the pressure sensor, which is based on the calibrated pressure-time change parameter and eliminates the influence of the inherent frequency of the pressure sensor itself and the environmental inherent frequency. Therefore, using the second integral value as the object of judgment and comparing it with the second set work value can evaluate the effect of the external pressure on the pressure sensor, and then determine whether the object being constrained is in a good or bad constrained state.

[0132] Due to the constraining effect of the constraining device on the object, especially the constraint in the loose constraint state is accompanied by the object being constrained always moving within the permitted range. For example, when a baby is constrained in a child seat or a stroller, the seat belt or restraint belt allows the baby to move within a certain range. Therefore, the pressure sensor will be able to obtain a continuous fluctuating image of pressure-time until the constraining device releases the constraint on the object being constrained.

[0133] The evaluation of the constraint state can be achieved by means of the second integral value and its corresponding physical meaning: when the constraint state of the constraining device on the object being constrained is poor, the object often does not receive sufficient constraint pressure, and at this time, the work done by the constraining device on the object being constrained is insufficient to limit its position state; on the contrary, when the object is well constrained, the constraining device has sufficient pressure on the object being constrained and can fully do work against the possible movements of the object being constrained to achieve a good constraining effect. Thus, by setting the second set work value and comparing it with the second integral value, a conclusion can be drawn as to whether the object is well constrained.

[0134] As an optimization of any of the technical solutions provided in the foregoing or subsequent parts of the present invention or any optimized technical solution, after obtaining the calibrated pressure-time change parameter, the step of generating a state signal indicating the constraint state of the object further includes:

[0135] Calculating the difference between the maximum pressure and the minimum pressure of the calibrated pressure-time change parameter within the fourth period according to the fourth period;

[0136] Comparing the difference with a first set amplitude; and

[0137] When the difference is greater than the first set amplitude, generating a state signal indicating a poor constraint state of the object, and when the difference is less than or equal to the first set amplitude, generating a state signal indicating a good constraint state of the object.

[0138] In addition to evaluating the restraint state of an object from the perspective of the pressure and work done by the restraining device on the restrained object, the restraint state of an object can also be judged by the movement, vibration or shaking state of the restrained object. Specifically, when the object is well restrained, the restraining device has a greater restriction on the movement of the restrained object. At this time, the amplitude of the movement, shaking or vibration of the object is small, and accordingly, the amplitude on the waveform graph of the calibration pressure-time variation parameter is also small; when the object is not well restrained, the amplitude of its movement, vibration or shaking is usually large, and the amplitude reflected in the waveform graph of the calibration pressure-time variation parameter is also large. Based on this, the first set amplitude can be set to evaluate the amplitude on the waveform graph of the calibration pressure-time variation parameter of the restrained object, so as to deduce the restraint state of the object.

[0139] Correspondingly, the assessment of the movement, shaking or vibration amplitude of the object may also be carried out with the aid of a displacement sensor or an acceleration sensor, whose configuration, analysis and processing steps of the sensing signal correspond to the above-mentioned method based on a pressure sensor and will not be repeated here.

[0140] Furthermore, the calibration pressure-time variation parameter can be applied to both evaluation criteria based on the pressure and work of the restraint device or based on the amplitude of movement, shaking or vibration of the restrained object. When using the method provided by the present invention to generate a signal representing the restraint state of an object, it can be flexibly selected based on the specific restraint scenario, the restraint requirements of the restrained object, and the characteristics of the restraint device. For example, when the restrained object is allowed to move within a certain range, and people are concerned about the restraint force that the restraint device can provide to the restrained object, pressure or work can be selected as the standard for evaluating the restraint state of the object; and when the scene requires the restrained object to move as little as possible, amplitude can be used as the standard for evaluating the restraint state of the object.

[0141] As an optimization of any technical solution or any optimized technical solution provided above or below the present invention, there are at least two pressure sensors capable of generating at least two pressure-time variation parameters, and the step of generating a state signal indicating the restraint state of the object comprises:

[0142] performing a sum operation on the at least two pressure-time variation parameters;

[0143] Integrating the summed result with respect to time to obtain a third integral value;

[0144] comparing the third integral value with a third set work value; and

[0145] When the third integral value is greater than the third set work value, a state signal indicating that the object restraint state is good is generated, and when the third integral value is less than or equal to the third set work value, a state signal indicating that the object restraint state is bad is generated.

[0146] When at least two of the pressure sensors are provided, it is necessary to process the at least two pressure-time change parameters. At this time, it can be considered to first perform an addition operation on the at least two pressure-time change parameters and then an integration operation, and then compare with a third set work value to determine the restraint state of the restrained object.

[0147] It should be noted that since each of the at least two pressure-time change parameters represents the pressure condition sensed by the corresponding pressure sensor, and considering the set positions of the pressure sensors on the restrained object and / or the restraint device, therefore, in the process of performing the addition operation on the at least two pressure-time change parameters, the set positions of each pressure sensor can be considered, and weighted processing can be given to each pressure-time change parameter in the addition operation.

[0148] The present application also provides a signal generating device configured to perform all steps of any one of the signal generating methods described above.

[0149] The state signal representing the object restraint state generated by the signal generating device can be transmitted through: Bluetooth wireless transmission - the signal transmission process and the reception process are independent of each other, and the signal transmission security is relatively high, but the transmission distance is limited; infrared wireless transmission - the signal transmission process and the reception process are independent of each other, and the signal transmission distance is relatively farther than that of Bluetooth, but if the infrared ray directly shines on the eyes, it may cause a certain degree of risk; ultrasonic or light wave radar transmission - the signal transmission distance is far, but the cost is high; and / or high-frequency transmitting device and 3G, 4G communication devices - can be connected to the public network for services, and can transmit monitoring signals and videos over a long distance. The disadvantages are the cost and high-frequency radiation damage.

[0150] In view of the respective advantages and disadvantages of the above different transmission methods, the most suitable transmission method can be selected according to the characteristics of the restraint occurrence scenario, or two or more signal transmission methods can be selected for combined transmission to balance the advantages and disadvantages between different signal transmission methods.

[0151] In addition, the signal generating device can be implemented or executed using any combination of integrated circuits (ICs) available in the circuit, general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination designed to perform the functions described herein. The general-purpose processor can be a microprocessor, but in an alternative, the processor can be any conventional processor, controller, microcontroller, or state machine. The processor can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors collaborating with a DSP core, or any other such configuration.

[0152] The present application also provides a safety restraint system, comprising:

[0153] a restraint device for restraining an object;

[0154] a sensing device disposed on the object to be restrained and / or the restraint device;

[0155] the signal generating device according to the foregoing; and

[0156] an alarm device communicatively connected to the signal generating device and capable of outputting an alarm message according to a status signal indicating the restraint status of the object.

[0157] The safety restraint system is used to ensure the restraint safety of the object to be restrained by promptly warning of an improper restraint status in a scenario where restraint is required. The safety restraint system can have an integrated structure, that is, the sensing device, the signal generating device, and the alarm device are all placed within the range of the restraint device and / or the object to be restrained, so that a reminder of the restraint status can be received in real time when the restraint device is arranged on the object to be restrained; correspondingly, the safety restraint system can also have a split structure, that is, the sensing device, the signal generating device, and the alarm device are respectively arranged in different areas, so that the sensing device is closer to the area where the restraint occurs, and the alarm device is closer to the area where the alarm signal needs to be received, thereby giving the safety restraint system greater flexibility in terms of setting.

[0158] The communication connection method between the alarm device and the signal generating device can be selected as a wired transmission form. In this case, the alarm device can be correspondingly arranged near the signal generating device. Of course, the communication connection method can also be selected as a wireless transmission form, such as Bluetooth wireless transmission. Thus, the installation positions between the alarm device and the signal generating device are no longer restricted by distance, enabling a status signal to be sent to the alarm devices within a certain range in a timely manner when an improper restraint occurs, so as to increase the alarm range of the safety restraint system.

[0159] Further, in order to protect the safety of the human head area, as an optimization of any technical solution provided in the foregoing or following of the present invention or any optimized technical solution, the restraint device includes:

[0160] A cap body;

[0161] A lace, arranged on the cap body and used to fasten the cap body to a set position on the head;

[0162] The sensing device includes:

[0163] A pressure sensor or an induction switch, arranged on the cap body and / or the lace and used to measure the pressure between the head and the cap body and / or the lace.

[0164] The safety restraint system provided with the cap body and the lace can be used in scenarios where the human head needs to be restrained and protected. Typical scenarios include environments where safety helmets need to be worn, such as construction sites, riding motorcycles / racing cars, etc., and also include environments where the head needs to be traction-fixed, such as during medical treatment for traction of the head to treat head or neck diseases, and preventing whiplash injuries to drivers or passengers (especially children) during the process of driving a motor vehicle due to sudden stops.

[0165] As an optimization of any technical solution provided in the foregoing or following of the present invention or any optimized technical solution, the induction switch includes a capacitive contact induction switch or a flexible thin-film switch.

[0166] Further, in a safety restraint system for restraining and protecting the head, it is preferably to use a wireless communication method to realize the connection between the signal generating device and the alarm device. Therefore, as an optimization of any technical solution provided in the foregoing or following of the present invention or any optimized technical solution, the safety restraint system further includes:

[0167] A Bluetooth transmitter, arranged on the cap body and / or the lace, communicatively connected to the signal generating device and used to transmit a status signal indicating the restraint state of the object; and

[0168] A Bluetooth receiver, communicatively connected to the alarm device and used to receive the status signal.

[0169] Further, in order to make the alarm device of the safety restraint system have a stronger alarm effect, as an optimization of any of the technical solutions provided in the foregoing or following of the present invention or any optimized technical solution, the alarm device includes:

[0170] A warning light, configured to emit a red flashing light when receiving the state signal of poor object restraint state, and not emit light or emit a green light when receiving the state signal of good object restraint state; and

[0171] A buzzer piece or a speaker, configured to emit a warning sound effect when receiving the state signal of poor object restraint state, and not make a sound when receiving the state signal of good object restraint state.

[0172] The warning light, the buzzer piece or the speaker can also adopt other alarm methods. For example, the warning light can use flashes of different frequencies to respectively correspond to different restraint states of the object, and the speaker can directly perform voice announcements of the restraint state, so as to facilitate the adjuster of the restraint action to adjust the restraint device and the restrained object.

[0173] As an optimization of any of the technical solutions provided in the foregoing or following of the present invention or any optimized technical solution, there is at least one induction switch, which is arranged on the cap body or the lace, and the safety restraint system is configured to:

[0174] Calculate the sensing signal of the induction switch, and trigger the alarm device when the sensing signal of any one of the induction switches corresponds to the state signal of poor object restraint state.

[0175] In scenarios where restraint protection is required, especially in tight restraint situations where strict requirements are imposed on the correct wearing of the restraint device, the induction switch should be provided at each key position of the restraint device. At this time, the safety restraint system is configured to trigger the alarm device when any one of the induction switches senses poor wearing. Under this concept, the induction switch should be arranged in the area where the cap body or the lace closely fits the head, such as in the area where the lace fits the lower jaw, the cap body fits the top of the head, and the cap band in the cap body fits the forehead and the back of the head.

[0176] When the contact state with the object sensed by the inductive switch at any of the above positions corresponds to the state of the object being restrained poorly, the safety restraint device can send out information that the restraint device is not restrained well, reminding the operator to adjust or put on the safety restraint device again, thereby avoiding the hidden dangers that may be caused by the restrained person untying the straps due to unwillingness to wear the safety restraint device. In addition, by setting inductive switches at multiple different positions of the safety restraint device, it is also possible to further avoid the situation where the restrained person presses the inductive switches by hand to "fake" the restraint state. As long as the restrained person cannot use his hands to contact and press all the inductive switches set at different positions in a reasonable manner at the same time, the safety restraint system can send out a signal of poor restraint state accordingly, so as to remind the operator to adjust the safety restraint device through an alarm.

[0177] As an optimization of any technical solution or any optimized technical solution provided above or below the present invention, the pressure sensor is at least one pair and is symmetrically arranged on the cap body and / or the strap, and the safety restraint system is configured as follows:

[0178] The sensing signals of each pair of the pressure sensors are weighted and then summed up, and a state signal indicating the restraint state of the object is generated based on the result of the summation.

[0179] For the cap body and / or strap, the setting of the pressure sensor can be based on the force point when the human head is restrained. For example, it can be set at the part where the strap is close to the cheek, so as to sense the pressure of the head from the left and right directions; it can also be set at the part where the strap is close to the chin and the part where the cap body is close to the top of the head, so as to sense the pressure of the head from the top and bottom directions; accordingly, it can also be set at the part where the cap body is close to the forehead and the area where the cap body is close to the back of the head, so as to sense the pressure of the head from the front and back directions.

[0180] The above-mentioned pressure sensing of the head from left to right, up to down, and front to back is an all-round detection of the head restraint state based on an orthogonal coordinate system. In the process of summing up the calculation, it should be considered that different parts of the cap body and the straps have different weighted values ​​due to the tightness of the restraint on the head.

[0181] In addition, in order to further improve the accuracy of the state signal generated under different requirements of the tightness of the restraint at different parts, as an optimization of any technical solution or any optimized technical solution provided in the foregoing or later text of the present invention, the device for generating a signal representing the restraint state of the object is further configured as follows:

[0182] Based on the tightness of the cap body and / or the strap on the head at the position where each pair of pressure sensors is set on the cap body and / or the strap, different set restraint thresholds are provided.

[0183] By setting different set restraint thresholds corresponding to the sensing signals sent by the pressure sensors at different parts, the safety restraint system can simultaneously monitor the multiple-channel restraint states sent by the pressure sensors at multiple parts and give a converging alarm prompt according to the set rules.

[0184] Taking the restraint of the head for the purpose of preventing whiplash injury as an example: To prevent a passenger in a motor vehicle from suffering whiplash injury caused by the head shaking violently forward and backward in a very short time due to the inertial effect when the motor vehicle makes an emergency stop or is impacted head-on during driving, the passenger of the motor vehicle can wear the cap body and the lacing of the present application and restrain the cap body and the lacing to the seat. Thus, in the state where the passenger wears the seat belt correctly, through the restraint effect of the cap body and the lacing on the passenger's head, the passenger's head and torso are relatively fixed to the seat and do not suddenly and greatly shake relative to each other, so as to avoid whiplash injury.

[0185] It can be seen that the above prevention of whiplash injury requires two restraints: one is the restraint effect of the cap body and the lacing on the passenger's head, and the other is the restraint effect of the seat belt on the passenger's torso, and neither can be missing. Based on this, the safety restraint system provided by the present application can set different set restraint thresholds by respectively arranging a jaw pressure sensor in the area of the lacing close to the jaw and arranging a torso pressure sensor in the area where the seat belt contacts the passenger's torso, and further based on different tightness requirements for head restraint and torso restraint. Thus, when the restraint state of any one place is poor, through the signal transmission between the Bluetooth transmitter and the Bluetooth receiver, the alarm device gives an alarm.

[0186] In the above scenario of preventing whiplash injury, the restraint requirements for the human torso and head are equally important. Therefore, the triggering rule of the alarm device is to give an alarm when the restraint requirement of any one place is not met. In other scenarios, for the multiple sensing signals generated by the multiple sensing devices, other triggering rules of the alarm device can be followed. For example, when the restraint requirements of a set number of parts are met, it is considered that the restraint state of the restrained object is good, or when only the restraint requirement of one part is met, it can be considered that the restraint state of the restrained object is good. Based on a logic calculation circuit or a logic calculator, the safety restraint system provided by the present invention can simultaneously monitor the multiple-channel restraint states sent by the sensing devices at multiple parts and give a converging alarm prompt according to the set rules.

[0187] Further, as an optimization of any of the technical solutions provided before or after the present invention or any optimized technical solution, the safety restraint system further includes:

[0188] The smart terminal with a Bluetooth receiving end can send out image information and / or voice information indicating that the restraint state of the safety restraint system is bad based on the state signal indicating the restraint state of the object received by the Bluetooth receiving end.

[0189] The smart terminal with a Bluetooth receiver may include a smart phone, a smart tablet, a smart watch, etc. Since the smart terminal is close to the user, it can provide the user of the smart terminal with more timely and accurate status signals and alarm information about the object binding status.

[0190] Further, as an optimization of any technical solution or any optimized technical solution provided above or below in the present invention, the intelligent terminal is further configured as follows:

[0191] Through the received signal, when the safety restraint system restrains an object and the smart terminal is away from the Bluetooth transmitter for more than a set distance, an image message and / or voice message indicating that the wearer of the safety restraint system is left behind is sent out.

[0192] The smart terminal can measure the distance between the smart terminal and the Bluetooth transmitter based on the principle of Bluetooth distance measurement, infrared distance measurement or laser distance measurement, thereby providing an additional distance alarm function. In the case of a child being left behind in a motor vehicle, the image information and / or voice information sent by the mobile terminal indicating that the wearer of the safety restraint system has been left behind can help the user of the smart terminal avoid leaving the child behind in the vehicle. In addition, based on the restraint state of the restraint device, the image information and / or voice information of the wearer of the safety restraint device being left behind is only sent to the smart terminal when the restraint device is well restrained or poorly restrained, so that the false alarm rate of the left-behind information will be further reduced.

[0193] Of course, based on the status signal received by the Bluetooth receiver, the safety restraint system can also use a combination of an independent Bluetooth receiver and an active buzzer to sound an alarm. The active buzzer can be powered by USB, which is convenient for application in any occasion where the active buzzer can be powered, such as a motor vehicle with a USB port. In addition, the combination of the independent Bluetooth receiver and the active buzzer has a low implementation cost and a small size, which is convenient for flexible implementation in a variety of environments. For scenarios where guardians are required to consciously supervise the restraint status of passengers (especially child passengers), it can effectively prevent the occurrence of lack of supervision due to the guardian forgetting the mobile phone or other smart terminal, or the smart terminal is set to flight mode or do not disturb mode, and no alarm for poor restraint status is received.

[0194] Based on this, the alarm device in the form of a combination of the independent Bluetooth receiving end and the active buzzer can be widely installed in motor vehicles, such as the interior of a school bus. In conjunction with the sensor device and the matching signal generating device provided on each seat belt, dynamic monitoring of the restraint status of each seat belt can be achieved, making it convenient for the driver or manager of the motor vehicle to adjust the seat belt in a bad restraint status in time, thereby ensuring the safety of the passengers in real time.

[0195] Furthermore, the image information and / or voice information of the wearer of the safety restraint system that has been left behind can also be output to a wider range, such as transmitted to a smart terminal within a certain distance, or transmitted to a local area network, local broadcast, and / or police system, to ensure the safety of the restrained person.

[0196] As an optimization of any technical solution or any optimized technical solution provided above or below the present invention, the smart terminal can play a preset audio file or video file, and the smart terminal is further configured as follows:

[0197] When a status signal indicating that the object is in a good restraint state is received, the audio file or the video file is played, and when a status signal indicating that the object is in a bad restraint state is received, the audio file or the video file is stopped from being played.

[0198] As an optimization of any technical solution or any optimized technical solution provided above or below the present invention, the smart terminal can be locked to prohibit the user's operation behavior, and the smart terminal is further configured as follows:

[0199] When a status signal indicating that the restraint state of the object is good is received, the locking operation is released, and when a status signal indicating that the restraint state of the object is not good is received, the locking operation is performed.

[0200] The process of only detecting a bad restraint state - generating an alarm signal - and requiring the operator to re-don or adjust the safety restraint device can easily cause both the wearer and the operator of the restraint device to become annoyed due to frequent alarms, thereby reducing their subjective willingness to wear the restraint device and the motivation to make timely adjustments to the safety restraint device, making the alarm signal unable to play its due reminder role.

[0201] Based on this, the present application sets up a process in which the restraint status is good - no alarm signal is generated - the smart terminal plays an audio or video file / the smart terminal unlocks the lock operation, so that the wearer and the operator of the restraint device are easily exposed to positive feedback and are more willing to actively wear and adjust the restraint device.

[0202] Taking the playing of video files or audio files as an example, the smart terminal can be set in an area within the visual or audible range of the wearer, so that when the restraint device is properly fastened, video or audio can be continuously played, and when the restraint state is not good, the playing will stop. In this case, once the playing stops, the wearer who wants to continue watching the video or audio file will actively adjust the restraint device to ensure that it is properly worn.

[0203] In one embodiment, when the restraint device is used to restrain and protect the passengers in the back row of a vehicle, the smart terminal can be set on the back of the front seat with the screen facing the rear passengers, so as to facilitate the wearer, especially a child of a younger age, to watch video files.

[0204] In another embodiment, the smart terminal can also provide positive feedback to the wearer through locking or unlocking operations. At this time, the smart terminal is no longer limited to playing video files or audio files, but can open other applications, such as game applications or reading applications, and the smart terminal can be held by the wearer. In this case, once the smart terminal is locked due to receiving a signal indicating a poor restraint state, the wearer holding the smart terminal will actively improve the restraint state until the smart terminal is unlocked to continue operating the smart terminal.

[0205] Based on the above technical solutions, the embodiments of the present invention can at least check the restraint state of an object to enhance the protective effect of the restraint device on the restrained object.

[0206] The following Figures 1 to 7 elaborates on the technical solutions provided by the present invention in more detail.

[0207] As Figure 1 shown, it is a schematic structural diagram of a safety restraint system provided by an embodiment of the present invention when applied to head protection. The figure shows the mutual setting relationship between the cap body 1 and the lacing 2, wherein the sensing device is set at positions 3 and 4 in the figure to measure the restraint pressure at different parts, and the label 5 in the figure indicates the anti-whiplash protection facility.

[0208] Figure 2 、 Figure 3 and Figure 4 are respectively schematic flowcharts of the signal generation method provided by an embodiment of the present invention. Among them Figure 2 shows the basic process of the signal generation method, that is, comparing the sensing signal from the sensing device with a set restraint threshold to obtain a status signal of the object restraint state. Figure 3 、 Figure 4respectively show methods for representing signals of an object's restraint state with level parameters and pressure-time variation parameters as dynamic characteristic parameters.

[0209] Figure 5 、 Figure 6 shows a schematic connection structure of the safety restraint system provided by an embodiment of the present invention. Among them, Figure 5 shows a sensing device, a signal generating device, and an alarm device arranged in a wired connection manner, while Figure 6 shows the connection relationship between an alarm device, a smart terminal, and a signal generating device arranged in a wireless connection manner with a Bluetooth transmitter as a node.

[0210] Figure 7 is a continuous sensing signal waveform diagram of the pressure-time variation parameter sensed by a pressure sensor in the method for generating a signal representing an object's restraint state provided by an embodiment of the present invention. The figure shows waveform variations with periods t1 and t2. Among them, the amplitude of the waveform variation within the t1 period is small, and the graph fluctuates up and down about the horizontal axis with zero pressure. Therefore, it can be determined that the pressure-time variation parameter measured by the pressure sensor within this period reflects characteristics such as the natural frequency of the pressure sensor itself or its installation position; while with point A as a node, the pressure sensor measures fluctuations up and down about point P1 with a larger amplitude (the pressure difference between points B and C), so it reflects the pressure fluctuation after the pressure sensor is pressed. Based on this, the interference of the natural frequency of the pressure sensor and its installation position can be eliminated by subtracting the waveform within the t2 period from the waveform within the t1 period.

[0211] In addition, as Figure 7 shown, the area between the waveform diagram and the horizontal axis, that is, the integral value of the pressure-time variation parameter with respect to time, reflects the work done by the outside on the restraint device provided with the pressure sensor and the restrained object (W = P * t).

[0212] For any of the above technical solutions disclosed by the present invention, unless otherwise stated, if it discloses a numerical range, the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is only the numerical values with obvious technical effects or representativeness among many implementable numerical values. Since there are too many numerical values to enumerate, the present invention only discloses some numerical values to illustrate the technical solutions of the present invention, and the above-listed numerical values should not constitute a limitation on the protection scope of the present invention.

[0213] If terms such as "first" and "second" are used in this article to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of differentiating components in description. Unless otherwise stated, the above terms have no special meaning.

[0214] Meanwhile, if the above-mentioned present invention discloses or involves components or structural members that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), or can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integral structure (for example, manufactured by integral forming using a casting process) (except where it is clearly impossible to use the integral forming process).

[0215] In addition, in any of the technical solutions disclosed in the above-mentioned present invention, the terms used to represent the positional relationship or shape, unless otherwise stated, include states or shapes that are approximate, similar, or close to it. Any component provided by the present invention can either be assembled from a plurality of individual components or be a single component manufactured by an integral forming process.

[0216] In the description of the present invention, if terms such as "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are used, then the orientation or positional relationship indicated by the above terms is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device, mechanism, component, or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention.

[0217] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the specific implementation manners of the present invention or make equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A signal generating method for generating a signal representing the bound state of an object, characterized in that, the method comprises the following steps: obtaining a sensing signal from a sensing device provided on the object to be bound and / or the binding device; generating a state signal representing the bound state of the object according to the dynamic characteristic parameters corresponding to the sensing signal and a set binding threshold; wherein, the sensing device includes at least two pressure sensors, the pressure sensors are capable of generating at least two pressure-time change parameters, the dynamic characteristic parameters include pressure-time change parameters, and before obtaining the sensing signal, the method further includes: the pressure sensors output continuous sensing signals regarding the pressure-time change parameters; wherein, the step of generating the state signal representing the bound state of the object includes: performing weighted processing on each pressure-time change parameter and then performing an addition calculation; performing an integration operation on the result of performing weighted processing on each pressure-time change parameter and then performing an addition calculation with respect to time to obtain a third integral value; comparing the third integral value with a third set work value; and when the third integral value is greater than the third set work value, generating a state signal indicating a good bound state of the object, and when it is less than or equal to the third set work value, generating a state signal indicating a poor bound state of the object.

2. The method according to claim 1, characterized in that, it further includes: performing an integration operation on the pressure-time change parameter with respect to time according to a second period to obtain a first integral value, and when the first integral value is greater than a first set work value, implementing the step of generating the state signal representing the bound state of the object.

3. A signal generating device configured to perform all steps of the signal generating method according to claim 1 or 2.

4. A safety binding system, characterized in that, it includes: a binding device for binding an object; the signal generating device according to claim 3, the pressure sensors are provided on the object to be bound and / or the binding device; and an alarm device communicatively connected to the signal generating device and capable of outputting an alarm message according to the received state signal representing the bound state of the object.

5. The safety binding system according to claim 4, characterized in that, the binding device includes: a cap body; a lacing provided on the cap body for binding the cap body to a set position on the head; the sensing device includes: a pressure sensor provided on the cap body and / or the lacing for measuring the pressure between the head and the cap body and / or the lacing.

6. The safety binding system according to claim 5, characterized in that, it further includes: a Bluetooth transmitter provided on the cap body and / or the lacing, communicatively connected to the signal generating device for transmitting the state signal representing the bound state of the object; and a Bluetooth receiver communicatively connected to the alarm device for receiving the state signal.

7. The safety binding system according to claim 5, characterized in that, the alarm device includes: A warning light, configured to emit a red flashing light when receiving a status signal indicating an improper object restraint state, and not emit light or emit a green light when receiving a status signal indicating a proper object restraint state; and A buzzer or a speaker, configured to emit a warning sound effect when receiving a status signal indicating an improper object restraint state, and not make a sound when receiving a status signal indicating a proper object restraint state.

8. The safety restraint system according to claim 5,[[]]END]] wherein,[[]]END]] the pressure sensors are symmetrically arranged on the cap body and / or the laces.

9. The safety restraint system according to claim 8,[[]]END]] wherein,[[]]END]] the device for generating a signal representing the object restraint state is further configured to:[[]]END]] have different set restraint thresholds based on the tightness of the restraint of the cap body and / or the laces on the head at the positions where each pair of the pressure sensors are arranged on the cap body and / or the laces.

10. The safety restraint system according to claim 6,[[]]END]] wherein,[[]]END]] further comprising:[[]]END]] An intelligent terminal with a Bluetooth receiver, capable of emitting image information and / or voice information indicating an improper restraint state of the safety restraint system based on the status signal representing the object restraint state received by the Bluetooth receiver.

11. The safety restraint system according to claim 10,[[]]END]] wherein,[[]]END]] the intelligent terminal is further configured to:[[]]END]] When the safety restraint system restrains an object and the intelligent terminal is more than a set distance away from the Bluetooth transmitter, emit image information and / or voice information indicating that the wearer of the safety restraint system has been left behind based on the received signal.

12. The safety restraint system according to claim 10,[[]]END]] wherein,[[]]END]] the intelligent terminal is capable of playing a preset audio file or video file, and the intelligent terminal is further configured to:[[]]END]] Play the audio file or video file when receiving a status signal indicating a proper object restraint state, and stop playing the audio file or video file when receiving a status signal indicating an improper object restraint state.

13. The safety restraint system according to claim 10,[[]]END]] wherein,[[]]END]] the intelligent terminal can be locked to prohibit the user's operation behavior, and the intelligent terminal is further configured to:[[]]END]] Release the locking operation when receiving a status signal indicating a proper object restraint state, and perform the locking operation when receiving a status signal indicating an improper object restraint state.

Images