WO2020015117A1

WO2020015117A1 - Proximity sensing detection method, proximity sensing detection device, sensing-type handle and baby carriage

Info

Publication number: WO2020015117A1
Application number: PCT/CN2018/105692
Authority: WO
Inventors: 夏孙城; 李自强; 林兆雄
Original assignee: 上海阿柚信息科技有限公司
Priority date: 2018-07-17
Filing date: 2018-09-14
Publication date: 2020-01-23

Abstract

A proximity sensing detection method, a proximity sensing detection device, and a sensing-type handle and a baby carriage using the proximity sensing detection device. The proximity sensing detection method comprises: acquiring a capacitance measurement value of a capacitive proximity sensing sensor; subtracting a pre-set measurement baseline capacitance from the capacitance measurement value to obtain a first capacitance fluctuation value; comparing the first capacitance fluctuation value with a pre-set ambient noise threshold value; performing temperature compensation on the capacitance measurement value when the first capacitance fluctuation value is greater than the pre-set ambient noise threshold value; and determining, according to the capacitance measurement value after temperature compensation, whether the capacitive proximity sensing sensor is triggered. By means of performing a temperature difference compensation operation on a capacitance measurement value, the technical effect of improving a proximity state detection accuracy is achieved, thereby resolving the problem that a capacitive proximity sensing sensor cannot detect removal of a human hand after being in a trigger state for a long time.

Description

Proximity detection method, proximity detection device, induction handle and baby carriage

Technical field

The present application relates to the field of proximity sensing, and in particular, to a proximity sensing detection method, a proximity sensing detection device, and an inductive handle and a baby carriage using the proximity sensing detection device.

Background technique

Capacitive proximity sensors detect the proximity of a human hand by sensing the change in capacitance caused when a human hand approaches, and can be used as a key or proximity sensor to replace traditional mechanical keys. When no human hand approaches, the capacitive proximity sensor will form a parasitic capacitance C _p with the outside world. When a human hand approaches, an additional capacitance C _h will be introduced. The total capacitance is C = C _p + C _h . In actual use, the parasitic capacitance C _p is easily affected by external environmental factors (especially temperature) and changes C _{p ′} . When C _{p ′} is equal to C _h , a false trigger will occur. The change in the parasitic capacitance C _{p ′} due to environmental changes is often relatively slow, and the capacitance C _h introduced when a person approaches is far away. In the related technology, when C changes slowly, it is filtered (average filtering, median filtering, low-pass filtering, or a combination of them) to obtain the baseline C _base . The baseline can track the change in parasitic capacitance caused by the environment. When C suddenly changes a lot, the difference between C and Cbase C _diff will be very large. At this time, it is considered that someone is approaching, the sensor is triggered, and the baseline remains unchanged before the trigger.

The inventor has found that the technical solution in the related art is that after the sensor is triggered, when the human hand is in a close state for a long time, the sensor is always in the triggered state, and the parasitic capacitance change C _{p ′} caused by the environment may become larger and larger with time. To reach or exceed C _h . Then release the hand again, the difference between C and C _base C _diff is still very large, the sensor can not detect the departure of the hand; in the actual use process, the parasitic capacitance C _p caused by temperature changes the most obvious. Release, it is easy to keep the trigger state due to the change of parasitic capacitance caused by temperature.

Summary of the invention

According to an aspect of the present application, a proximity sensing detection method is provided, and the proximity sensing detection method includes:

Obtain the capacitance measurement value of the capacitive proximity sensor;

Subtracting the preset measurement baseline capacitance from the capacitance measurement value to obtain a first capacitance fluctuation value;

Comparing the first capacitance fluctuation value with a preset environmental noise threshold;

Performing temperature compensation on the capacitance measurement value when the first capacitance fluctuation value is greater than the preset environmental noise threshold; and

It is determined whether the capacitive proximity sensor is triggered according to the temperature-compensated capacitance measurement value.

Optionally, the step of determining whether the capacitive proximity sensor is triggered according to the temperature-compensated capacitance measurement value in the proximity sensing detection method includes:

Subtracting the measured baseline capacitance from the temperature-compensated capacitance measurement value to obtain a second capacitance fluctuation value; and

The obtained second capacitance fluctuation value is compared with a preset proximity trigger threshold, wherein when the second capacitance fluctuation value is greater than the preset proximity trigger threshold, it is determined that the capacitive proximity sensor is in a trigger state.

Optionally, the step of performing temperature compensation on the capacitance measurement value when the capacitance fluctuation value is greater than the preset environmental noise threshold in the proximity sensing detection method includes:

Obtaining the temperature at the capacitive proximity sensor;

Calculate the temperature compensation capacitor value based on the obtained temperature; and

Subtract the temperature compensation capacitance value from the capacitance measurement value to obtain a temperature compensation capacitance measurement value.

Optionally, the preset measured baseline capacitance in the proximity sensing detection method is a value obtained by filtering the capacitance measurement value when the first capacitance fluctuation value is less than the preset environmental noise threshold.

Optionally, the filtering process in the proximity sensing detection method includes average filtering, median filtering, low-pass filtering, or a combination thereof.

Optionally, after determining that the capacitive proximity sensor is in a triggered state, the proximity detection method further includes: continuously monitoring a trigger state of the capacitive proximity sensor.

Optionally, the step of continuously monitoring the triggering state of the capacitive proximity sensor in the proximity detection method includes:

Obtaining a capacitance measurement value of the capacitive proximity sensor;

Performing temperature compensation on the capacitance measurement value;

It is determined whether there is an object approaching the capacitive proximity sensing sensor according to the capacitance measurement value after temperature compensation.

Optionally, the step of determining whether an object approaches the capacitive proximity sensor according to the temperature-compensated capacitance measurement value in the proximity sensing detection method includes:

Comparing the obtained second capacitance fluctuation value with a preset proximity trigger threshold, wherein when the second capacitance fluctuation value is less than the preset proximity trigger threshold, it is determined that there is no object approaching the capacitive proximity sensing sensor .

According to another aspect of the present application, a proximity sensing detection device is provided, including: a capacitive proximity sensing sensor for obtaining a capacitance measurement value; and a filter comparison circuit for subtracting a preset value from the capacitance measurement value. Measuring the baseline capacitance to obtain a first capacitance fluctuation value, and comparing the first capacitance fluctuation value with a preset environmental noise threshold; a compensation circuit configured to make the first capacitance fluctuation value greater than the preset value Perform temperature compensation on the capacitance measurement value when the ambient noise threshold is 5%; and a proximity sensing determining circuit for determining whether the capacitive proximity sensor is triggered according to the capacitance measurement value after temperature compensation.

Optionally, the proximity sensing determining circuit in the proximity sensing detection device is configured to subtract the measured baseline capacitance from the temperature-compensated capacitance measurement value to obtain a second capacitance fluctuation value, and to obtain the second capacitance fluctuation value obtained. The two capacitance fluctuation values are compared with a preset proximity trigger threshold, wherein when the second capacitance fluctuation value is greater than the preset proximity trigger threshold, it is determined that the capacitive proximity sensor is in a trigger state.

Optionally, the compensation circuit in the proximity sensing detection device is configured to obtain a temperature at the capacitive proximity sensor, calculate a temperature compensation capacitance value according to the obtained temperature, and subtract the capacitance value from the capacitance measurement value. And removing the temperature compensation capacitance value to obtain a temperature compensation capacitance measurement value.

Optionally, the filter comparison circuit in the proximity sensing detection device is configured to obtain the measurement baseline by filtering the capacitance measurement value when the first capacitance fluctuation value is less than the preset environmental noise threshold. capacitance.

According to another aspect of the present application, an inductive handle is provided, which includes a handle body and the above-mentioned proximity detection device provided on the handle body.

Optionally, the handle body is covered with a handle plastic sleeve.

Optionally, the handle body is composed of a U-shaped handle metal tube.

Optionally, the handle body is provided with a low-battery alarm lamp for displaying a power state.

Optionally, the handle body is provided with a brake indicator for displaying a brake status.

Optionally, the handle body is provided with a car push button for one-button car push.

Optionally, a car lock is also provided on the handle body.

According to another aspect of the present application, there is provided a baby carriage including the inductive handle as described above and a body of the baby carriage, the inductive handle being disposed on an upper portion of the baby carriage.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which form a part of this application, serve to provide a further understanding of the application, and make other features, objects, and advantages of the application more apparent. The drawings and descriptions of the schematic embodiments of the present application are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

1 is a schematic diagram of a proximity sensing detection method according to an embodiment of the present application;

2 is a flowchart of a temperature compensation process according to an embodiment of the present application;

3 is a schematic flowchart of a detachment monitoring process according to an embodiment of the present application;

4 is a schematic block diagram of a proximity detection device according to an embodiment of the present application;

5 is a structural diagram of an induction handle according to an embodiment of the present application;

6 is an external view of a sensory handle according to an embodiment of the present application;

7 is a schematic diagram of a baby carriage according to an embodiment of the present application; and

FIG. 8 is a front view of a baby carriage according to an embodiment of the present application.

detailed description

In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only Examples are part of this application, but not all examples. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without creative efforts should fall within the protection scope of this application.

It should be noted that the terms “first” and “second” in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way may be interchanged where appropriate, so that the embodiments of the present application described herein. Furthermore, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or device that includes a series of steps or units need not be limited to those explicitly listed Those steps or units may instead include other steps or units not explicitly listed or inherent to these processes, methods, products or equipment.

In this application, the terms "up", "down", "left", "right", "front", "rear", "top", "bottom", "inside", "outside", "middle", The orientation or position relationship indicated by “vertical”, “horizontal”, “horizontal”, “longitudinal” and the like is based on the orientation or position relationship shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

In addition, some of the terms mentioned above may be used to indicate other positions or positions, in addition to other meanings. For example, the term "up" may be used to indicate some kind of dependency or connection in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present utility model can be understood according to specific situations.

In addition, the terms "install", "setup", "provide", "connect", "connect", and "socket" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or a monolithic structure; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be two devices, components or components Internal connectivity. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The application will be described in detail below with reference to the drawings and embodiments.

The present application provides a proximity sensing detection method and a proximity sensing detection device to solve the problem that a capacitive proximity sensing sensor cannot detect the departure of a human hand after being in a triggered state for a long time. The temperature difference compensation operation is performed on the measured capacitance value to achieve the purpose of eliminating the influence of heating caused by holding the handle for a long time and then determining the approach state, thereby achieving the technical effect of improving the accuracy of the approach state detection and further solving the capacitive approach After the inductive sensor is in a triggered state for a long time, it cannot detect the problem of human hands leaving.

As shown in FIG. 1, a method for detecting proximity sensing is disclosed. The method includes the following steps S101 to S105:

S101: Acquire a capacitance measurement value of a capacitive proximity sensor;

S102. Subtract the preset measured baseline capacitance from the capacitance measurement value to obtain a first capacitance fluctuation value.

S103. Compare the first capacitance fluctuation value with a preset environmental noise threshold;

S104. Perform temperature compensation on the capacitance measurement value when the first capacitance fluctuation value is greater than the preset environmental noise threshold; and

S105. Determine whether the capacitive proximity sensor is triggered according to a capacitance measurement value after temperature compensation.

Capacitive proximity sensors detect the proximity of human hands by sensing the change in capacitance caused by human hands. They can be used as keys or proximity switches instead of traditional mechanical buttons. When no human hands approach, the capacitive proximity sensor is connected to the outside world. A parasitic capacitance C _p will be formed. When a human hand approaches, an additional capacitance C _h will be introduced. The total capacitance is C = C _p + C _h , where C is the capacitance measurement value.

The first capacitance fluctuation value is a difference between the capacitance measurement value and the measured baseline capacitance; specifically, since the parasitic capacitance C _p is easily affected by external environmental factors (especially temperature) in actual use, a change C _p ′ is generated, A false trigger occurs when C _p 'is comparable in size to C _h . The change in the parasitic capacitance C _p 'due to environmental changes is often relatively slow, and the capacitance C _h introduced by a human hand or other conductive object changes quickly. Is common practice when C changes slowly, its filter (average filtering, median filtering, low pass filtering, or a combination between them) to give the C _base at baseline (i.e., baseline capacitance measurement), the measurement can be tracked baseline capacitance C _base The change in parasitic capacitance caused by environmental noise, and the calculation formula: CC _base = C _diff , to obtain the first capacitance fluctuation value C _diff , and using the first capacitance fluctuation value C _diff for detection can exclude the capacitance measurement value caused by environmental noise The change. When C has a large change suddenly, the first capacitance fluctuation value C _diff will be very large. At this time, it can be determined that a human hand approaches and the sensor triggers, and the measured baseline capacitance C _base remains unchanged before the trigger.

Optionally, the preset measurement baseline capacitance C _base in the proximity sensing detection method is obtained by filtering the capacitance measurement value when the first capacitance fluctuation value is less than the preset environmental noise threshold value C _noise . Value. The environmental noise threshold C _noise is an upper limit of the average environmental noise of the capacitive proximity sensor preset according to statistical data; if the capacitance fluctuation value obtained after excluding the measured baseline capacitance from the measured capacitance value is greater than the environmental noise threshold, it indicates that The measured capacitance value includes signal changes that are not caused by ambient noise, which is often caused by temperature rise at the location where an object (such as a human hand) approaches or a capacitive proximity sensor.

After the sensor is triggered, the baseline is no longer updated, so the parasitic capacitance changes caused by the environment cannot be tracked by the baseline update. When the human hand is in the approaching state for a long time, the sensor is always in the triggering state, and the parasitic capacitance change C _p ′ caused by temperature rise may become larger and larger with time, reaching or exceeding (close to the triggering threshold) C _th . After you release your hand, the difference C _diff between the capacitance measurement C and the baseline C _base is still large, and the sensor cannot detect the departure of the hand. Therefore, a temperature difference compensation operation needs to be performed on the capacitance measurement to solve the capacitive proximity sensing. After the sensor has been triggered for a long period of time, it cannot detect the problem of human hands leaving.

Optionally, as shown in FIG. 2, in the proximity sensing detection method, the step of performing temperature compensation on the capacitance measurement value when the capacitance fluctuation value is greater than the preset environmental noise threshold includes:

S201. Obtain the temperature at the capacitive proximity sensor.

S202. Calculate a temperature compensation capacitance value according to the obtained temperature.

S203: Subtract the temperature compensation capacitance value from the capacitance measurement value to obtain a temperature compensation capacitance measurement value.

Specifically, the temperature compensation operation detects the current temperature T through a temperature measurement device; and then calculates the capacitance change value C _T caused by the temperature change. Experiments have found that, under the same conditions, the temperature change is positively related to the capacitance value change, and the ratio is proportional. The coefficient is measured experimentally according to the actual situation. Finally, through the calculation formula: C = CC _T , the capacitance measurement value C that can reflect the true proximity / touch state is obtained after removing the temperature influence, and calculated again based on the measured capacitance value C after temperature compensation. Obtain the latest second capacitance fluctuation value C _diff , and then determine whether the second capacitance fluctuation value C _diff is greater than the approaching trigger threshold C _th . If it is greater, it indicates that the sensor has been triggered, otherwise enter the next measurement cycle, where C _th is The set proximity trigger threshold is used to indicate a capacitance change value caused when a human body approaches the capacitive proximity sensor, and an appropriate value is taken from an actual measurement result. Under normal circumstances, the approach threshold C _{th is} larger than the ambient noise threshold C _noise .

Optionally, the preset measured baseline capacitance in the proximity sensing detection method is obtained by filtering the capacitance measurement value when the first capacitance fluctuation value is less than the preset environmental noise threshold C _noise . Value. Optionally, the filtering process includes any one of an average filtering, a median filtering, and a low-pass filtering, or a combination thereof. Generally, the magnitude of the environmental noise threshold C _noise is lower than the magnitude of the capacitance fluctuation value caused by the object approaching the sensor or the temperature increase at the sensor, and when there is no object approaching the sensor and the temperature at the sensor does not increase, only The capacitance fluctuation value caused by the environmental noise is smaller than the environmental noise threshold C _noise .

In some embodiments, the predetermined measurement baseline capacitance C _{base is} stored in a register, and the capacitance obtained in the measurement cycle is only obtained when the capacitance fluctuation value C _diff obtained in the measurement cycle is less than the environmental noise threshold C _noise . The measurement value is filtered to obtain an updated current measurement baseline capacitance C _base , and the updated current measurement baseline capacitance C _{base is} stored in a register for subsequent measurement processing.

Optionally, as shown in FIG. 3, the step of continuously monitoring the triggering state of the capacitive proximity sensor in the proximity detection method includes:

S301. Acquire a capacitance measurement value of the capacitive proximity sensor.

S302. Perform temperature compensation on the capacitance measurement value.

S303. Determine whether an object approaches the capacitive proximity sensing sensor according to the capacitance measurement value after temperature compensation.

Optionally, the step S303 of determining whether an object approaches the capacitive proximity sensor according to the temperature-compensated capacitance measurement value in the proximity sensing detection method includes:

After the proximity sensor is triggered (that is, when the human hand approaches), if the human hand is in the proximity state for a long time and the sensor is always in the triggered state, the change in parasitic capacitance C _p 'caused by the temperature rise may become more and more with the accumulation of time. Large, reaching or even exceeding the near-threshold threshold _Cth . After that, even if the hand is released again, the difference C _diff between the capacitance measurement C and the baseline C _base is still large (equal to the parasitic capacitance change C _p 'caused by the above temperature increase), so the sensor cannot detect the hand leaving, so After the sensor is triggered, the capacitance measurement value needs to be continuously monitored. The temperature compensation operation is performed in each test cycle to eliminate the problem of false trigger detection caused by temperature rise.

In some embodiments, the method for continuous monitoring after the proximity sensor is triggered as described in steps S301 to S303 can be used in combination with the proximity detection method in steps S101 to S105, or can be used alone to accurately determine the object / Is the hand away from the sensor?

According to another aspect of the present application, as shown in FIG. 4, a proximity detection device 100 is provided, which includes: a capacitive proximity sensor 101 for acquiring a capacitance measurement value; and a filter comparison circuit 20 for converting The capacitance measurement value is subtracted from a preset measurement baseline capacitance to obtain a first capacitance fluctuation value, and the first capacitance fluctuation value is compared with a preset environmental noise threshold; a compensation circuit 30 is configured to Performing a temperature compensation on the capacitance measurement value when the capacitance fluctuation value is greater than the preset environmental noise threshold; and a proximity sensing determining circuit 40 for determining the capacitive proximity sensing based on the temperature compensation capacitance measurement value Whether the sensor is triggered.

Optionally, the proximity sensing determining circuit 40 in the proximity sensing detection device 100 is configured to subtract the measured baseline capacitance from the temperature-compensated capacitance measurement value to obtain a second capacitance fluctuation value, and to obtain the second capacitance fluctuation value. The second capacitance fluctuation value is compared with a preset proximity trigger threshold, wherein when the second capacitance fluctuation value is greater than the preset proximity trigger threshold, it is determined that the capacitive proximity sensor 101 is in a trigger state.

Optionally, the compensation circuit 30 in the proximity detection device 100 is configured to obtain a temperature at the capacitive proximity sensor 101, calculate a temperature compensation capacitance value according to the obtained temperature, and measure the capacitance from the capacitance. The value of the temperature compensation capacitance is subtracted from the value to obtain a capacitance measurement value after temperature compensation.

Optionally, the filter comparison circuit 20 in the proximity sensing detection device is configured to obtain the measurement by performing a filtering process on a capacitance measurement value when the first capacitance fluctuation value is less than the preset environmental noise threshold. Baseline capacitance. The filter comparison circuit 20 is composed of a filter, a subtraction circuit, and a comparator. The subtraction circuit is configured to perform a subtraction operation on the capacitance measurement value input by the capacitive proximity sensor 101 and the measurement baseline capacitance value stored in a register. Obtain the capacitance fluctuation value; the comparator circuit is used to compare the obtained capacitance fluctuation value with a preset environmental noise threshold value and output the comparison result; the filter is used to perform the capacitance measurement value when the capacitance fluctuation value is less than the environmental noise threshold value. The filtering process obtains an updated measurement baseline capacitance C _base , and stores the measurement baseline capacitance C _base in a register.

In some embodiments of the present application, as shown in FIG. 5 and FIG. 6, two of the capacitive proximity sensors 2 are symmetrically disposed on the left and right sides of the handle body 1, and the capacitive proximity sensors 2 will sense The obtained results are transmitted to the proximity detection device via a wired / wireless manner.

In some embodiments of the present application, the handle body 1 is composed of a U-shaped handle metal tube 5, and the handle body 1 is covered with a handle plastic sleeve 4. The design of the U-shaped handle metal tube 5 increases the The stability of the handle body 1 is increased by placing the handle plastic cover 4 on the handle body 1 to increase frictional resistance and comfort.

In some embodiments of the present application, the handle body 1 is provided with a battery box 6 for supplying power to the handle control circuit board 3. A battery is provided in the battery box 6, and the battery box 6 can be opened by opening the battery box 6. To replace the battery to ensure the normal power supply of each module.

In some embodiments of the present application, the handle body 1 is provided with a low-battery warning lamp 9 for displaying a battery state and a brake indicator 10 for displaying a brake state, the low-battery alarm lamp 9 and the brake The indicator light 10 is electrically connected to the proximity sensing detection device. Specifically, when the battery power in the battery box 6 is lower than a preset low power value, the low power alarm lamp 9 is turned on.

In some embodiments of the present application, the handle body 1 is provided with a car receiving button 7 and a car receiving lock 8 for realizing a one-button car receiving function.

As shown in FIGS. 7 and 8, according to another aspect of the present application, a stroller is provided.

The baby carriage according to the present application includes the above-mentioned inductive handle and a main body of the baby carriage, and the inductive handle is provided on an upper portion of the baby carriage.

In some embodiments of the present application, the main body of the stroller is further provided with a main control circuit board 11 for receiving an electrical signal sent by the proximity sensing detection device, and the main control circuit board 11 is disposed on the stroller. The lower part is covered with a protective shell.

In some embodiments of the present application, the stroller body is further provided with a wheel module 12 for receiving a control signal sent by the main control circuit board 11, and the wheel module 12 is electrically connected to the main control circuit board 11. connection.

Preferably, the wheel module 12 is provided with a braking device. In other embodiments of the present application, the wheel module 12 may be provided with a speed measuring device. Specifically, the wheel module 12 receives the main control circuit. After the brake signal sent from the board 11, the brake is applied; the wheel module sends the calculated wheel speed to the main control circuit board 11 module.

Obviously, those skilled in the art should understand that the above-mentioned modules or steps of the present invention can be implemented by a general-purpose computing device, and they can be concentrated on a single computing device or distributed on a network composed of multiple computing devices Above, optionally, they can be implemented with program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, or they can be separately made into individual integrated circuit modules, or they can be stored in Multiple modules or steps are made into a single integrated circuit module for implementation. As such, the invention is not limited to any particular combination of hardware and software.

The above description is only a preferred embodiment of the present application, and is not intended to limit the present application. For those skilled in the art, this application may have various modifications and changes. Any modification, equivalent replacement, or improvement made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

A proximity sensing detection method includes:

Obtain the capacitance measurement value of the capacitive proximity sensor;

Subtracting the preset measurement baseline capacitance from the capacitance measurement value to obtain a first capacitance fluctuation value;

Comparing the first capacitance fluctuation value with a preset environmental noise threshold;

Performing temperature compensation on the capacitance measurement value when the first capacitance fluctuation value is greater than the preset environmental noise threshold;

It is determined whether the capacitive proximity sensor is triggered according to the temperature-compensated capacitance measurement value.
The method of claim 1, wherein the step of determining whether the capacitive proximity sensor is triggered according to a capacitance measurement value after temperature compensation comprises:

Subtracting the measured baseline capacitance from the temperature-compensated capacitance measurement value to obtain a second capacitance fluctuation value; and

The obtained second capacitance fluctuation value is compared with a preset proximity trigger threshold, wherein when the second capacitance fluctuation value is greater than the preset proximity trigger threshold, it is determined that the capacitive proximity sensor is in a trigger state.
The method of claim 1, wherein the step of performing temperature compensation on the capacitance measurement value when the capacitance fluctuation value is greater than the preset environmental noise threshold comprises:

Obtaining the temperature at the capacitive proximity sensor;

Calculate the temperature compensation capacitor value based on the obtained temperature; and

Subtract the temperature compensation capacitance value from the capacitance measurement value to obtain a temperature compensation capacitance measurement value.
The method of claim 1, wherein the preset measured baseline capacitance is obtained by filtering the capacitance measurement value when the first capacitance fluctuation value is less than the preset environmental noise threshold. Value.
The method of claim 4, wherein the filtering process includes an average filter, a median filter, a low-pass filter, or a combination thereof.
The proximity detection method according to claim 2, wherein after determining that the capacitive proximity sensor is in a triggered state, the proximity detection method further comprises: continuously monitoring a trigger state of the capacitive proximity sensor .
The method of claim 6, wherein the step of continuously monitoring the triggering state of the capacitive proximity sensor comprises:

Obtaining a capacitance measurement value of the capacitive proximity sensor;

Performing temperature compensation on the capacitance measurement value;

It is determined whether there is an object approaching the capacitive proximity sensing sensor according to the capacitance measurement value after temperature compensation.
The proximity sensing detection method according to claim 7, wherein the step of determining whether an object approaches the capacitive proximity sensor according to the capacitance measurement value after temperature compensation comprises:

Subtracting the measured baseline capacitance from the temperature-compensated capacitance measurement value to obtain a second capacitance fluctuation value; and

Comparing the obtained second capacitance fluctuation value with a preset proximity trigger threshold, wherein when the second capacitance fluctuation value is less than the preset proximity trigger threshold, it is determined that there is no object approaching the capacitive proximity sensing sensor .
A proximity sensing detection device includes:

Capacitive proximity sensor, which is used to obtain capacitance measurements;

A filter comparison circuit, configured to subtract the preset measurement baseline capacitance from the capacitance measurement value to obtain a first capacitance fluctuation value, and compare the first capacitance fluctuation value with a preset environmental noise threshold;

A compensation circuit configured to perform temperature compensation on the capacitance measurement value when the first capacitance fluctuation value is greater than the preset environmental noise threshold; and

The proximity sensing determining circuit is configured to determine whether the capacitive proximity sensing sensor is triggered according to a temperature-compensated capacitance measurement value.
The proximity sensing detection device according to claim 9, wherein the proximity sensing determining circuit is configured to subtract the measured baseline capacitance from the temperature-compensated capacitance measurement value to obtain a second capacitance fluctuation value, and to obtain the second capacitance fluctuation value, and The second capacitance fluctuation value is compared with a preset proximity trigger threshold, wherein when the second capacitance fluctuation value is greater than the preset proximity trigger threshold, it is determined that the capacitive proximity sensor is in a trigger state.
The proximity sensing detection device according to claim 9, wherein the compensation circuit is configured to obtain a temperature at the capacitive proximity sensor, calculate a temperature-compensated capacitance value based on the obtained temperature, and from the capacitance measurement value And subtracting the temperature compensation capacitance value from to obtain a capacitance measurement value after temperature compensation.
The proximity sensing detection device according to claim 9, wherein the filter comparison circuit is configured to obtain the measurement result by performing a filtering process on a capacitance measurement value when the first capacitance fluctuation value is less than the preset environmental noise threshold. Measure the baseline capacitance.
An inductive handle, comprising: a handle body, and the proximity detection device according to claim 9 provided on the handle body.
The inductive handle according to claim 13, wherein the handle body is covered with a handle plastic cover.
The inductive handle according to claim 13, wherein the handle body is formed by a U-shaped handle metal tube.
The inductive handle according to claim 13, wherein the handle body is provided with a low-battery alarm lamp for displaying a power state.
The inductive handle according to claim 13, wherein a brake indicator light for displaying a braking state is provided on the handle body.
The inductive handle according to claim 13, characterized in that the handle body is provided with a button for closing the vehicle by one button.
The inductive handle according to claim 18, wherein a car lock is further provided on the handle body.
A stroller comprising the induction handle according to claim 13 and a stroller body, the induction handle is disposed on an upper portion of the stroller.