A near-field sensing swimming timing touch pad

Abstract

The present invention relates to the field of near-field sensing technology, and in particular to a near-field sensing swimming timing touch pad, comprising: a touch pad housing; a touch panel; a sensing module; a signal monitoring module; and a control module, which is used to determine that the stability of the timing touch pad does not meet the requirements according to the timing error of the signal monitoring module, adjust the capacitance equivalent value of the capacitance sensor or preliminarily determine whether the accuracy of the touch panel meets the requirements and secondarily determine the accuracy of the touch panel according to the sensitivity of the sensing unit, and, when it is secondarily determined that the accuracy of the touch panel does not meet the requirements, adjust the trigger threshold of the capacitance sensor or determine that the real-time performance of the electrical signal transmission of the touch panel does not meet the requirements according to the average reset time of the continuous triggering of the capacitance sensor, and perform the initial adjustment on the filter cutoff frequency. The present invention achieves the improvement of the stability, accuracy and real-time performance of the electrical signal transmission of the touch pad.

Description

Technical Field

[0001] The invention relates to the technical field of near-field induction, and in particular to a near-field induction swimming timing touch panel. Background Art

[0002] In the prior art, swimming touchpads are widely used in various swimming competitions and are an indispensable part of swimming competitions. With the popularization of swimming and the improvement of competitive level, the demand for swimming touchpads is also increasing. There are many brands and models of swimming touchpads on the market to meet the needs of different competitions and venues. To ensure the fairness and accuracy of the competition, the touchpad needs to have high sensitivity and reliability. The application of near-field sensing in touchpads not only improves the sensitivity and accuracy of touchpads, but also enables touchpads to better adapt to various operating environments and swimmers' habits. At the same time, near-field sensing technology also brings more possibilities to touchpads, such as realizing advanced functions such as gesture recognition and multi-touch.

[0003] Chinese Patent Publication No.: CN114565988A discloses a multi-identity swimming timing system based on near field communication technology, including a swimming lane touch panel, characterized in that: the swimming lane touch panel is provided with an ID / IC / NFC card reader module, the ID / IC / NFC card reader module is used to read the ID / IC / NFC card module information and obtain the identity number data; and a numbering device, which is used to be worn on the swimmer, the numbering device is provided with an ID / IC / NFC card module, the ID / IC / NFC card module can send the identity number data to the ID / IC / NFC card reader module; wherein, when the numbering device realizes near field communication with the swimming lane touch panel for the first time, the ID / IC / NFC card reader module reads the identity number data transmitted by the ID / IC / NFC card module of the numbering device, and starts timing for the swimmer corresponding to the identity number data, and when the numbering device realizes near field communication with the swimming lane touch panel for the second time or the Nth time, the timing for the swimmer corresponding to the identity number data is ended. It can be seen that the multi-identity swimming timing system based on near field communication technology has the problems of low stability, accuracy and real-time performance of the touch panel transmission. Summary of the invention

[0004] To this end, the present invention provides a near-field sensing swimming timing touch panel to overcome the problems of low stability, accuracy and low real-time performance of electrical signal transmission of the touch panel in the prior art.

[0005] To achieve the above object, the present invention provides a near-field sensing swimming timing touch pad, comprising a touch pad housing, and further comprising:

[0006] A touch panel connected to the touch panel housing to provide a touch position for the swimmer;

[0007] a sensing module connected to the touch panel, comprising a sensing unit for generating a capacitance change signal when a swimmer touches the touch panel housing, and a signal processing unit connected to the sensing unit for converting the capacitance change signal into a standard electrical signal, wherein the signal processing unit comprises a capacitance sensor for converting the capacitance change signal into an electrical signal to be filtered;

[0008] A signal monitoring module, which is connected to the sensing module and is used to monitor, record and time the electrical signal;

[0009] a control module, which is connected to the sensing module and the signal monitoring module respectively, and is used to adjust the capacitance equivalent value of the capacitance sensor or preliminarily determine that the accuracy of the touch panel does not meet the requirements and secondarily determine the accuracy of the touch panel according to the sensitivity of the sensing unit when it is determined that the stability of the timing touch panel does not meet the requirements according to the timing error of the signal monitoring module.

[0010] and, when it is determined for the second time that the accuracy of the touch panel does not meet the requirements, the trigger threshold of the capacitive sensor is adjusted, or when it is determined based on the average reset time of the continuous triggering of the capacitive sensor that the real-time performance of the electrical signal transmission of the touch panel does not meet the requirements, the filter cutoff frequency is adjusted for the first time,

[0011] When the adjustment range of the filter cutoff frequency exceeds the limited adjustment range, the filter cutoff frequency is adjusted for the second time according to the filtering rate of the filter when operating according to the cutoff frequency after the initial adjustment.

[0012] Furthermore, the sensing unit comprises:

[0013] Covering layer;

[0014] A capacitive sensor electrode connected to the cover layer to generate a capacitance change signal;

[0015] A grounding copper foil connected to the capacitive sensor electrode to form a loop between the swimmer, the capacitive sensor and the ground;

[0016] A printed circuit board is connected to the cover layer, the capacitance sensor electrode and the grounding copper foil respectively, and is used to connect the sensing unit and the capacitance sensor and conduct the capacitance change signal to the signal processing unit.

[0017] Furthermore, the signal processing unit also includes a filter connected to the capacitive sensor for filtering the electric signal to be filtered to output the standard electric signal.

[0018] Further, the control module is connected to the signal monitoring module, and is used to calculate an average timing error according to a number of timing errors of the signal monitoring module, and when the average timing error is greater than or equal to a preset second timing error, it is determined that the stability of the timing touch panel does not meet the requirements, and the capacitance equivalent value of the capacitive sensor is increased;

[0019] If the average timing error is greater than a preset first timing error and less than a preset second timing error, the control module preliminarily determines that the accuracy of the touch panel does not meet the requirement.

[0020] Furthermore, the control module is connected to the signal processing unit to obtain the sensitivity of the sensing unit, and when the sensitivity is less than or equal to a preset first sensitivity, it is determined that the accuracy of the touch panel does not meet the requirement, and the trigger threshold of the capacitive sensor is reduced;

[0021] If the sensitivity is less than the preset second sensitivity and greater than the preset first sensitivity, the control module preliminarily determines that the real-time performance of the touch panel does not meet the requirements.

[0022] Furthermore, the control module is respectively connected to the sensing module and the signal monitoring module to obtain an average reset time of continuous triggering of the capacitive sensor. When the average reset time of continuous triggering is greater than or equal to a preset reset time, it is determined for the second time that the real-time performance of the touch panel does not meet the requirements, and the filter cutoff frequency is reduced to output an adjustment amplitude of the cutoff frequency after the initial adjustment.

[0023] Furthermore, the adjustment amplitude of the filter cutoff frequency is determined according to the difference between the average reset duration of the continuous triggering and the preset reset duration.

[0024] Furthermore, the formula for the average reset time of the continuous triggering is:

[0025]

[0026] Where T is the average reset time of continuous triggering, t i is the reset duration of the i-th continuous trigger, n is the number of comparisons, and n is a natural number greater than 1.

[0027] Furthermore, the control module is respectively connected to the capacitive sensor and the filter to obtain the filtering rate of the filter of the capacitive sensor per unit time, and when the filtering rate of the filter is less than a preset filtering rate, it is determined that the signal frequency exceeds the frequency to be retained and the cutoff frequency of the filter is adjusted secondary.

[0028] Furthermore, the cutoff frequency of the filter is inversely proportional to the filtering rate of the filter.

[0029] Compared with the prior art, the beneficial effect of the present invention is that the system of the present invention waterproofs the internal circuit by setting a touch shell, thereby reducing the impact of water on the normal operation of the circuit inside the touch shell. When a swimmer swims toward the touch panel, an impact force will be generated toward the touch panel. The touch panel shell can weaken the impact of water impact on the accuracy of the touch panel, thereby achieving the cleaning and normal operation of the touch panel to extend its service life. In addition, the touch panel shell also provides a non-slip surface and an internal structure for mounting a fixed structure, thereby achieving the fairness of the swimming competition and the enhancement of the safety of the swimmer. The system of the present invention sets a touch panel so that the swimmer can clearly know the touch range when swimming. The clear and easy-to-operate touch panel realizes the swimming The swimmer can determine the position of the touch panel in the water far away from the timing touch panel, thereby improving the timeliness of timing in swimming competitions; by setting the sensing module, when the swimmer touches the touch shell, the human body and the sensing module immediately form a loop, thereby improving the real-time sensing of the timing touch panel; by setting the signal monitoring module, the electrical signal formed by the sensing module is monitored in real time and recorded and timed, and the sensing module based on near-field sensing is not directly connected to the signal monitoring module, which can reduce the influence of the force generated by the swimmer's touch on the signal monitoring module, thereby improving the performance and real-time of the touch panel; by setting the control module to adjust the sensing module and the signal monitoring module, the stability and accuracy of the timing touch panel are improved.

[0030] Furthermore, the system of the present invention provides a sensing unit, and the signal generated when the human body directly contacts it has an extremely fast response speed, so that the touch operation can be responded to quickly and with high precision, thereby improving the timing precision and accuracy.

[0031] Furthermore, the system of the present invention provides a signal processing unit to immediately transmit the electrical signal caused by touch in the loop to the signal monitoring module, thereby improving the real-time performance of timing. The filter therein can reduce the impact of noise in the water environment, thereby further improving the stability of the timing touch panel.

[0032] Furthermore, the system of the present invention provides a control module, and when the stability of the timing touch panel does not meet the requirements, the capacitance equivalent value of the capacitive sensor is increased, thereby achieving an increase in the gain of the signal conversion loop; when the accuracy of the touch panel does not meet the requirements, the trigger threshold of the capacitive sensor is reduced, thereby reducing the impact of the error caused by false touch on the timing accuracy of the timing touch panel; when the real-time performance of the touch panel electrical signal transmission does not meet the requirements, the cutoff frequency of the filter is adjusted, thereby reducing the impact of noise caused by environmental factors on the signal monitoring module. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the overall structure of a near-field sensing swimming timing touch panel according to an embodiment of the present invention;

[0034] Figure 2 This is a block diagram of the overall structure of the near-field sensing swimming timing touch panel according to an embodiment of the present invention;

[0035] Figure 3 This is a structural block diagram of a sensing unit of a near-field sensing swimming timing touch pad according to an embodiment of the present invention;

[0036] Figure 4 This is a structural block diagram of a signal processing unit of a near-field sensing swimming timing touch pad according to an embodiment of the present invention;

[0037] Explanation of the reference numerals: 1-touch panel housing, 2-touch panel, 3-covering layer, 4-capacitive sensor electrode, 5-printed circuit board, 6-capacitive sensor, 7-signal monitoring module, 8-filter. DETAILED DESCRIPTION

[0038] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0040] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0041] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] See also Figure 1 , Figure 2 , Figure 3 as well as Figure 4As shown, they are respectively a schematic diagram of the overall structure of the near-field sensing swimming timing touch pad, a block diagram of the overall structure, a block diagram of the sensing unit structure, and a block diagram of the signal processing unit structure of the embodiment of the present invention. The near-field sensing swimming timing touch pad of the present invention comprises a touch pad housing 1, and also comprises:

[0043] A touch panel 2 connected to the touch panel housing 1 to provide a touch position for a swimmer;

[0044] A sensing module connected to the touch panel, comprising a sensing unit for generating a capacitance change signal when a swimmer touches the touch panel housing 1 and a signal processing unit connected to the sensing unit for converting the capacitance change signal into a standard electrical signal, wherein the signal processing unit comprises a capacitance sensor 6 for converting the capacitance change signal into an electrical signal to be filtered;

[0045] A signal monitoring module 7, which is connected to the sensing module and is used to monitor, record and time the electrical signal;

[0046] a control module, which is connected to the sensing module and the signal monitoring module respectively, and is used to adjust the capacitance equivalent value of the capacitance sensor 6 or preliminarily determine that the accuracy of the touch panel 2 does not meet the requirements and secondarily determine the accuracy of the touch panel 2 according to the sensitivity of the sensing unit when it is determined that the stability of the timing touch panel does not meet the requirements according to the timing error of the signal monitoring module 7,

[0047] And, when it is determined for the second time that the accuracy of the touch panel 2 does not meet the requirements, the trigger threshold of the capacitive sensor 6 is adjusted, or when it is determined based on the average reset time of the continuous triggering of the capacitive sensor 6 that the real-time performance of the electrical signal transmission of the touch panel 2 does not meet the requirements, the filter cutoff frequency is adjusted for the first time,

[0048] When the adjustment range of the filter cutoff frequency exceeds the limited adjustment range, the filter cutoff frequency is adjusted for the second time according to the filtering rate of the filter when operating according to the cutoff frequency after the initial adjustment.

[0049] Specifically, the touch panel 2 provides the swimmer with an obvious timing touch position, ensuring that the swimmer can determine the specific position of the timing touch panel on the swimming pool wall during the swimming process.

[0050] In practice, the system of the present invention waterproofs the internal circuit by setting a touch shell, thereby reducing the impact of water on the normal operation of the circuit inside the touch shell. When a swimmer swims toward the touch panel, an impact force will be generated toward the touch panel. The touch panel shell 1 can weaken the impact of water impact on the accuracy of the touch panel 2, thereby achieving the cleaning and normal operation of the touch panel to extend its service life. In addition, the touch panel shell 1 also provides a non-slip surface and an internal structure for mounting a fixed structure, thereby achieving the fairness of the swimming competition and the safety of the swimmer. The system of the present invention sets a touch panel 2 so that the swimmer can clearly know the touch range when swimming. The clear and easy-to-operate touch panel 2 enables the swimmer to clearly know the touch range when swimming. The position of the touch panel 2 can be determined even in the water of the board, thereby improving the timeliness of timing in swimming competitions; by setting up a sensing module, when a swimmer touches the touch shell, a loop is immediately formed between the human body and the sensing module, thereby improving the real-time sensing of the timing touch panel; by setting up a signal monitoring module 7, the electrical signal formed by the sensing module is monitored in real time and recorded and timed, and the sensing module based on near-field sensing is not directly connected to the signal monitoring module 7, which can reduce the influence of the force generated by the swimmer's touch on the signal monitoring module 7, thereby improving the performance and real-time of the touch panel; by setting up a control module to adjust the sensing module and the signal monitoring module 7, the stability and accuracy of the timing touch panel are improved.

[0051] Specifically, the color of the touch panel 2 is set to orange, so that the swimmer can clearly see the position of the timing touch panel while swimming.

[0052] Specifically, the touch panel housing 1 and the touch panel 2 are both made of conductive materials, such as aluminum alloy, sheet molding compound and FR4.

[0053] Specifically, the sensing unit includes:

[0054] Covering layer 3;

[0055] A capacitance sensor 6 electrode 4 connected to the cover layer 3 for generating a capacitance change signal;

[0056] A grounding copper foil (not shown), which is connected to the electrode 4 of the capacitive sensor 6 to form a loop between the swimmer, the capacitive sensor 6 and the ground;

[0057] The printed circuit board 5 is respectively connected to the cover layer 3, the electrode 4 of the capacitive sensor 6 and the grounding copper foil, and is used to connect the sensing unit and the capacitive sensor 6 and conduct the capacitance change signal to the signal processing unit.

[0058] Specifically, the material of the covering layer 3 can be stainless steel, ITO glass and graphene, and the capacitive sensors are placed under the covering layer 3 to reduce environmental impact and prevent ESD problems caused by direct finger contact.

[0059] Specifically, the capacitive sensor 6 uses an electrode formed by copper cladding to detect the change in capacitance between the electrode and the ground. When a human hand touches it, the capacitance formed by the electrode and the human body, the capacitance between the power ground and the earth, and the series capacitance between the human body and water are introduced into the entire loop, thereby generating a capacitance change signal.

[0060] In practice, the system of the present invention sets a sensing unit to generate a signal when the human body directly contacts it, with a response speed of less than 3ms, so that the touch operation can be responded to quickly with high precision, thereby improving the timing precision and accuracy.

[0061] Specifically, the signal processing unit further includes a filter 8 connected to the capacitive sensor 6 for filtering the electric signal to be filtered to output the standard electric signal.

[0062] In practice, the system of the present invention sets a signal processing unit to immediately transmit the electrical signal caused by touch in the loop to the signal monitoring module 7, thereby improving the real-time performance of timing. The filter 8 therein can reduce the impact of noise in the water environment, further improving the stability of the timing touch panel.

[0063] Specifically, the control module is connected to the signal monitoring module 7, and is used to calculate the average timing error according to several timing errors of the signal monitoring module 7, and when the average timing error is greater than or equal to a preset second timing error, it is determined that the stability of the timing touch panel does not meet the requirements, and the capacitance equivalent value of the capacitance sensor 6 is increased;

[0064] If the average timing error is greater than a preset first timing error and less than a preset second timing error, the control module preliminarily determines that the accuracy of the touch panel 2 does not meet the requirement.

[0065] Specifically, the formula for the average timing error is:

[0066]

[0067] Where S is the average timing error, s i is the i-th timing, n is the number of comparisons, and n is a natural number greater than 1.

[0068] In implementation, the preset first timing error generally has a value range of [2ms, 4ms], and the preset second timing error has a value range of [5ms, 7ms].

[0069] Preferably, the preferred embodiment of the preset first timing error is 3 ms, and the preferred embodiment of the preset second timing error is 6 ms.

[0070] In implementation, the capacitance equivalent value of the capacitance sensor 6 increases by 30pF every time the difference between the average timing error and the preset second timing error exceeds 0.5ms. For example, when the current capacitance equivalent value is 150pF and the average timing error of the timing touch panel is 8ms, the average timing error exceeds the preset second timing error by 2ms, then the capacitance equivalent value of the capacitance sensor 6 increases to 150pF+4×30pF=270pF.

[0071] Specifically, the control module is connected to the signal processing unit to obtain the sensitivity of the sensing unit. When the sensitivity is less than or equal to the preset first sensitivity, it is determined that the accuracy of the touch panel 2 does not meet the requirements, and the trigger threshold of the capacitive sensor 6 is reduced;

[0072] If the sensitivity is less than the preset second sensitivity and greater than the preset first sensitivity, the control module preliminarily determines that the real-time performance of the touch panel 2 does not meet the requirements.

[0073] In implementation, the preset first sensitivity generally has a value range of [8mV / mm, 12mV / mm], and the preset second sensitivity has a value range of [15mV / mm, 20mV / mm].

[0074] Preferably, the preferred embodiment of the preset first sensitivity is 10 mV / mm, and the preferred embodiment of the preset second sensitivity is 18 mV / mm.

[0075] In implementation, the trigger threshold of the capacitive sensor 6 is reduced by 15pF / mm every time the difference between the sensitivity of the sensing unit and the preset first sensitivity exceeds 2mV / mm. For example, when the current sensitivity is 6mV / mm and the trigger threshold of the capacitive sensor 6 is 80pF / mm, the sensitivity is 4mV / mm less than the preset first sensitivity, then the trigger threshold of the capacitive sensor 6 is reduced to 80pF / mm-2×15pF / mm=50pF / mm.

[0076] Specifically, the control module is respectively connected to the sensing module and the signal monitoring module 7 to obtain the average reset time of the continuous triggering of the capacitive sensor 6. When the average reset time of the continuous triggering is greater than or equal to the preset reset time, it is determined for the second time that the real-time performance of the touch panel 2 does not meet the requirements, and the filter cutoff frequency is reduced to output the adjustment amplitude of the cutoff frequency after the initial adjustment.

[0077] Specifically, the formula for the average reset time of the continuous triggering is:

[0078]

[0079] Where T is the average reset time of continuous triggering, t i is the reset duration of the i-th continuous trigger, n is the number of comparisons, and n is a natural number greater than 1.

[0080] Specifically, the adjustment amplitude of the filter cutoff frequency is determined according to the difference between the average reset duration of the continuous triggering and the preset reset duration.

[0081] In practice, the preset reset duration generally ranges from [0.6ms, 1ms].

[0082] Preferably, the preferred embodiment of the preset reset time length is 0.8 ms.

[0083] In implementation, the filter cutoff frequency is reduced by 5Hz every time the difference between the average reset time of continuous triggering of the capacitive sensor 6 and the preset reset time exceeds 0.1ms. For example, the current average reset time of continuous triggering of the capacitive sensor 6 is 1.2ms, the filter cutoff frequency is 50Hz, and the average reset time exceeds the preset reset time by 0.4ms, then the filter cutoff frequency is reduced to 50Hz-4×5Hz=30Hz.

[0084] Specifically, the control module is connected to the capacitive sensor 6 and the filter 8, respectively, to obtain the filtering rate of the filter of the capacitive sensor 6 per unit time. When the filtering rate of the filter is less than the preset filtering rate, it is determined that the adjustment amplitude of the cutoff frequency after the initial adjustment exceeds the limited adjustment amplitude and the cutoff frequency of the filter is adjusted for the second time.

[0085] Specifically, the filtering rate of a filter means the amount of data that the filter can process per second.

[0086] Specifically, the cutoff frequency of the filter is inversely proportional to the filtering rate of the filter.

[0087] In implementation, the preset filtering rate generally ranges from [3Mbit, 4Mbit].

[0088] Preferably, the preset filtering rate is 3.5 Mbit (megabit).

[0089] In practice, the modulation amplitude is limited to 16 Hz.

[0090] In implementation, the filter cutoff frequency increases by 1.5Hz for every time the absolute value of the difference between the filtering rate of the filter and the preset filtering rate exceeds 0.2Mbit. For example, the filtering rate of the current filter is 3.1Mbit, and the adjustment range of the filter cutoff frequency is 20Hz, which exceeds the limited adjustment range of 16Hz. The reduced filter cutoff frequency is 30Hz, then the filter cutoff frequency increases to 30Hz+1.5×2=33Hz.

[0091] In implementation, the system of the present invention sets a control module, and when the stability of the timing touch panel does not meet the requirements, the capacitance equivalent value of the capacitive sensor 6 is increased, thereby improving the gain of the signal conversion loop; when the accuracy of the touch panel 2 does not meet the requirements, the trigger threshold of the capacitive sensor 6 is reduced, thereby reducing the influence of the error caused by false touch on the timing accuracy of the timing touch panel; when the real-time performance of the electrical signal transmission of the touch panel 2 does not meet the requirements, the cutoff frequency of the filter is adjusted, thereby reducing the influence of noise caused by environmental factors on the signal monitoring module 7.

[0092] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A near-field sensing swimming timing touch pad, comprising a touch pad housing, characterized in that: Also includes: A touch panel connected to the touch panel housing to provide a touch position for the swimmer; a sensing module connected to the touch panel, comprising a sensing unit for generating a capacitance change signal when a swimmer touches the touch panel housing, and a signal processing unit connected to the sensing unit for converting the capacitance change signal into a standard electrical signal, wherein the signal processing unit comprises a capacitance sensor for converting the capacitance change signal into an electrical signal to be filtered; A signal monitoring module, which is connected to the sensing module and is used to monitor, record and time the electrical signal; a control module, which is connected to the sensing module and the signal monitoring module respectively, and is used to adjust the capacitance equivalent value of the capacitance sensor or preliminarily determine that the accuracy of the touch panel does not meet the requirements and secondarily determine the accuracy of the touch panel according to the sensitivity of the sensing unit when it is determined that the stability of the timing touch panel does not meet the requirements according to the timing error of the signal monitoring module. and, when it is determined for the second time that the accuracy of the touch panel does not meet the requirements, the trigger threshold of the capacitive sensor is adjusted, or when it is determined based on the average reset time of the continuous triggering of the capacitive sensor that the real-time performance of the electrical signal transmission of the touch panel does not meet the requirements, the filter cutoff frequency is adjusted for the first time, When the adjustment range of the filter cutoff frequency exceeds the limited adjustment range, the filter cutoff frequency is adjusted for the second time according to the filtering rate of the filter when operating according to the cutoff frequency after the initial adjustment.

2. The near-field sensing swimming timing touch pad according to claim 1, characterized in that: The sensing unit comprises: Covering layer; A capacitive sensor electrode connected to the cover layer to generate a capacitance change signal; A grounding copper foil connected to the capacitive sensor electrode to form a loop between the swimmer, the capacitive sensor and the ground; A printed circuit board is connected to the cover layer, the capacitance sensor electrode and the grounding copper foil respectively, and is used to connect the sensing unit and the capacitance sensor and conduct the capacitance change signal to the signal processing unit.

3. The near-field sensing swimming timing touch pad according to claim 2, characterized in that: The signal processing unit further includes a filter connected to the capacitive sensor for filtering the electric signal to be filtered to output the standard electric signal.

4. The near-field sensing swimming timing touch pad according to claim 3, characterized in that: The control module is connected to the signal monitoring module, and is used to calculate an average timing error according to a number of timing errors of the signal monitoring module, and when the average timing error is greater than or equal to a preset second timing error, determine that the stability of the timing touch panel does not meet the requirements, and increase the capacitance equivalent value of the capacitance sensor; If the average timing error is greater than a preset first timing error and less than a preset second timing error, the control module preliminarily determines that the accuracy of the touch panel does not meet the requirement.

5. The near-field sensing swimming timing touch pad according to claim 4, characterized in that: The control module is connected to the signal processing unit to obtain the sensitivity of the sensing unit. When the sensitivity is less than or equal to the preset first sensitivity, it is determined that the accuracy of the touch panel does not meet the requirement and the trigger threshold of the capacitive sensor is reduced. If the sensitivity is less than the preset second sensitivity and greater than the preset first sensitivity, the control module preliminarily determines that the real-time performance of the touch panel does not meet the requirements.

6. The near-field sensing swimming timing touch pad according to claim 5, characterized in that: The control module is connected to the sensing module and the signal monitoring module respectively to obtain an average reset time of continuous triggering of the capacitive sensor. When the average reset time of continuous triggering is greater than or equal to a preset reset time, it is determined that the real-time performance of the touch panel does not meet the requirements for a second time, and the filter cutoff frequency is reduced to output an adjustment amplitude of the cutoff frequency after the initial adjustment.

7. The near-field sensing swimming timing touch pad according to claim 6, characterized in that: The adjustment amplitude of the filter cutoff frequency is determined according to the difference between the average reset time length of the continuous triggering and the preset reset time length.

8. The near-field sensing swimming timing touch pad according to claim 7, characterized in that: The formula for the average reset duration of the continuous triggering is: Where T is the average reset time of continuous triggering, t i is the reset duration of the i-th continuous trigger, n is the number of comparisons, and n is a natural number greater than 1.

9. The near-field sensing swimming timing touch pad according to claim 8, characterized in that: The control module is connected to the capacitive sensor and the filter respectively, and is used to obtain the filtering rate of the filter of the capacitive sensor within a unit time. When the filtering rate of the filter is less than the preset filtering rate, it is determined that the adjustment amplitude of the cutoff frequency after the initial adjustment exceeds the limited adjustment amplitude and the cutoff frequency of the filter is adjusted for the second time.

10. The near-field sensing swimming timing touch pad according to claim 9, characterized in that: The cutoff frequency of the filter is inversely proportional to the filtering rate of the filter.

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