CN112468913B - Wearing detection device - Google Patents
Wearing detection device Download PDFInfo
- Publication number
- CN112468913B CN112468913B CN201910844081.6A CN201910844081A CN112468913B CN 112468913 B CN112468913 B CN 112468913B CN 201910844081 A CN201910844081 A CN 201910844081A CN 112468913 B CN112468913 B CN 112468913B
- Authority
- CN
- China
- Prior art keywords
- terminal
- antenna
- circuit
- capacitance
- detection device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1041—Mechanical or electronic switches, or control elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
- H04R2201/105—Manufacture of mono- or stereophonic headphone components
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geology (AREA)
- Signal Processing (AREA)
- Environmental & Geological Engineering (AREA)
- Acoustics & Sound (AREA)
- Remote Sensing (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
Abstract
The application provides a wear detection device, should wear detection device includes antenna and electric capacity detection module, through multiplexing antenna, regard the antenna as a electric capacity detection electrode, can form the electric capacity effect between this antenna and the human body, under the condition that does not additionally increase the electrode, the capacitance value that detects the electric capacity that forms between this antenna and the human body through electric capacity detection module detects this wearing state of wearing detection device, under the condition that can realize this wearing detection device's the detection function of wearing, can reduce this internal space of wearing detection device effectively, can reduce this size of wearing detection device on the one hand, on the other hand can reduce this cost of manufacture of wearing detection device.
Description
Technical Field
The present application relates to electronic devices, and more particularly, to a wear detection device.
Background
The True Wireless Stereo (TWS) headset has no traditional physical wires, and also has many intelligent functions, and is widely used. In order to realize the wearing detection function, the TWS earphone is provided with a capacitance sensor and a capacitance sensing metal electrode, the capacitance sensing metal electrode and a human body can form a capacitance effect, and a capacitance sensing chip can detect the capacitance variation between the capacitance sensing metal electrode and the human body so as to realize the wearing detection function. For example, when the TWS earphone is worn on the ear, the skin of the ear is close to the capacitance sensing metal electrode, so that the capacitance value of the capacitance sensing metal electrode and the human body is increased, and the capacitance sensing chip detects the increased capacitance value, and the TWS earphone is considered to be worn.
In order to improve the detection sensitivity and accuracy, the capacitance sensing metal electrode needs to have a metal area large enough to form a large capacitance with the human body, so that the capacitance is detected by the capacitance sensing chip. However, the TWS earphone has a small size and a limited internal space, and it is difficult to make the metal area of the capacitance sensing metal electrode large.
Disclosure of Invention
The application provides a wear detection device, multiplexing antenna, regard as a electric capacity detection electrode with the antenna, can form the electric capacity effect between this antenna and the human body, under the condition that does not additionally increase the electrode, the capacitance value through detecting the electric capacity that forms between this antenna and the human body detects this wearing state of wearing detection device, under the condition that can realize this wearing detection device wear the detection function, can reduce this interior space of wearing detection device effectively, can reduce this size of wearing detection device on the one hand, on the other hand can reduce this cost of manufacture of wearing detection device.
In a first aspect, a wear detection device is provided, the wear detection device comprising:
an antenna comprising a first end;
the capacitance detection module is used for detecting the capacitance value of a capacitor formed between the antenna and a human body and determining the wearing state of the wearing detection device according to the capacitance value, the capacitance detection module comprises a capacitance sensing chip, the capacitance sensing chip comprises a first end, and the first end of the capacitance sensing chip is electrically connected with the first end of the antenna.
Therefore, the wearing detection device provided by the application multiplexes the antenna under the condition that the electrode is not additionally arranged, the antenna is used as a capacitance detection electrode, the capacitance detection module is electrically connected to the antenna, the capacitance effect formed between the antenna and the human body is utilized, the wearing state of the wearing detection device is detected by detecting the capacitance value of the capacitance formed between the antenna and the human body through the capacitance detection module, the internal space of the wearing detection device can be effectively reduced under the condition that the wearing detection function of the wearing detection device can be realized, on one hand, the size of the wearing detection device can be reduced, and on the other hand, the manufacturing cost of the wearing detection device can be reduced.
Optionally, the capacitance detection module further includes a first filter circuit for filtering out a first interference signal, where the first interference signal includes a part or all of signals except for a signal transmitted between the antenna and the capacitance detection module, and the first end of the capacitance sensing chip is electrically connected to the first end of the antenna through the first filter circuit.
Therefore, the wearing detection device provided by the application is provided with the first filter circuit, so that the first end of the capacitance sensing chip is electrically connected to the antenna through the first filter circuit, interference signals can be effectively filtered, and the signal quality is improved.
Optionally, the capacitance detection module further includes a first resistor connected in series with the first filter circuit.
Therefore, the wearing detection device that this application provided sets up the first resistance of establishing ties with first filter circuit, and the first end with electric capacity sensing chip is connected to the antenna through first resistance and first filter circuit electricity, can reduce the charge-discharge time of antenna through first resistance, is convenient for detect antenna's charge-discharge time to obtain the capacitance value between antenna and the human body.
Optionally, the capacitance detection module further includes a compensation circuit, the compensation circuit includes a first end and a second end, the capacitance sensing chip includes a second end and a third end, the first end of the compensation circuit is electrically connected to the third end of the capacitance sensing chip, and the second end of the compensation circuit is electrically connected to the second end of the capacitance sensing chip.
Therefore, the utility model provides a wear detection device sets up compensating circuit, through the detection of capacitive sensing chip to compensating circuit, realizes the compensation function to the passageway between capacitive sensing chip's first end and the antenna to reduce external environment and wear the influence that factors such as the inside temperature of detection device and humidity detected to the electric capacity, improve and wear detection device's detection accuracy.
Optionally, the compensation circuit includes a compensation capacitor, the compensation capacitor includes a first end and a second end, the first end of the compensation capacitor is electrically connected to the third end of the capacitance sensing chip, the second end of the compensation capacitor is electrically connected to the second end of the capacitance sensing chip, the first end of the compensation capacitor is the first end of the compensation circuit, and the second end of the compensation capacitor is the second end of the compensation circuit.
Therefore, the wearing detection device provided by the application is provided with the compensation capacitor, the capacitance value between the antenna and the human body which is relatively accurate can be measured by comparing the true value and the measured value of the compensation capacitor through the capacitance sensing chip, the compensation function of the channel between the first end of the capacitance sensing chip and the antenna is realized, the influence of the external environment, the temperature, the humidity and other factors inside the wearing detection device on the capacitance detection is reduced, and the detection accuracy of the wearing detection device is improved.
Optionally, the compensation circuit further comprises a second resistor, and the second resistor is connected in series with the compensation capacitor.
Therefore, the wearing detection device that this application provided sets up the second resistance with compensation capacitor series connection, and the third end with capacitance sensing chip passes through the second resistance electricity and connects to compensation capacitor, can reduce compensation capacitor's charge-discharge time through the second resistance, is convenient for detect compensation capacitor's charge-discharge time to obtain compensation capacitor's capacitance value.
Optionally, the compensation circuit further comprises a second filter circuit, and the second filter circuit is connected in series with the compensation capacitor.
Optionally, the wearing detection device further includes a wireless module, the wireless module includes a first end, and the first end of the wireless module is electrically connected to the first end of the antenna.
Optionally, the wireless module includes a wireless communication module and a third filter circuit connected in series, the third filter circuit is configured to filter a second interference signal, the second interference signal includes a part or all of signals except for a signal transmitted between the antenna and the wireless module, the wireless communication module includes a first end, the third filter circuit includes a first end and a second end, the first end of the wireless communication module is electrically connected to the first end of the third filter circuit, the second end of the third filter circuit is electrically connected to the first end of the antenna, and the second end of the third filter circuit is the first end of the wireless module.
Therefore, the wearing detection device provided by the application is provided with the third filter circuit, so that the first end of the wireless communication module is electrically connected to the antenna through the third filter circuit, interference signals can be effectively filtered, and the signal quality is improved.
Optionally, the third filter circuit includes a dc blocking circuit for filtering out a dc signal, the dc blocking circuit includes a first end and a second end, the second end of the dc blocking circuit is electrically connected to the first end of the antenna, the first end of the dc blocking circuit is electrically connected to the first end of the wireless communication module, the first end of the dc blocking circuit is the first end of the third filter circuit, and the second end of the dc blocking circuit is the second end of the third filter circuit.
Optionally, the third filter circuit includes a matching circuit for filtering out signals other than the dc signal in the second interference signal, the matching circuit includes a first end and a second end, the second end of the matching circuit is electrically connected to the first end of the antenna, the first end of the matching circuit is electrically connected to the first end of the wireless communication module, the first end of the matching circuit is the first end of the third filter circuit, and the second end of the matching circuit is the second end of the third filter circuit.
Optionally, an operating frequency of the capacitance detection module is different from an operating frequency of the wireless module.
Therefore, the wearing detection device provided by the application adopts a frequency division multiplexing mode, so that the working frequency of the capacitance detection module is different from that of the wireless module, and the mutual interference between signals transmitted between the antenna and the capacitance detection module and between the antenna and the wireless module can be effectively reduced.
Optionally, the operating frequency of the wireless module is a high frequency, and the operating frequency of the capacitance detection module is a low frequency.
Optionally, the wearing detection device is a real wireless stereo TWS headset.
Drawings
Fig. 1 is a schematic structural diagram of a TWS headset provided in the present application.
Fig. 2 to 9 are schematic block diagrams of the wear detection device provided in the present application.
Fig. 10-12 are schematic block diagrams of wireless modules provided herein.
Fig. 13-14 are another schematic block diagrams of a wireless module provided herein.
Fig. 15 to 16 are another schematic block diagrams of the wear detection device provided in the present application.
Detailed Description
The technical solution in the present application will be described below with reference to the accompanying drawings.
In the embodiment of the present application, the electrical connection between a and B may be understood as direct electrical connection between a and B, or may be understood as electrical connection between a and B through other elements, and the specific form is not limited at all.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The features defined as "first" and "second" may explicitly or implicitly include one or more of the features.
In the embodiment of the present application, "and/or" describes an association relationship of an associated object, indicating that three relationships may exist, for example, a and/or B may indicate: a alone, both A and B, and B alone, where A, B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
The wearing detection device provided by the application can be a device simultaneously having a wireless communication function and a wearing detection function, the wearing detection device is not limited to a TWS earphone, and exemplarily, the wearing detection device can also be various devices such as an electronic bracelet, an electronic watch, Virtual Reality (VR) glasses, and Augmented Reality (AR) glasses for mobile applications.
The utility model provides a wear detection device, multiplexing antenna, regard as a electric capacity detection electrode with the antenna, can form the electric capacity effect between this antenna and the human body, under the condition that does not additionally increase the electrode, the capacitance value through the electric capacity that detects the electric capacity that forms between this antenna and the human body detects this wearing detection device's wearing state, under the condition that can realize this wearing detection device wear the detection function, can reduce this internal space of wearing detection device effectively, can reduce this size of wearing detection device on the one hand, on the other hand can reduce this cost of manufacture of wearing detection device.
Hereinafter, the wearing detection device provided by the present application will be described with reference to fig. 1 to 16.
Fig. 1 is a schematic block diagram of a TWS headset provided by the present application. It should be understood that the TWS headset is only one example of a wear detection device of the present application and should not be construed as limiting the present application. As shown in fig. 1, the TWS headset 100 includes an antenna 110, a housing 120, and other modules (not shown in fig. 1) electrically connected to the antenna 110, the antenna 110 being a metal antenna, and the antenna 110 may be disposed on an inner surface (as shown in fig. 1) or an outer surface of the housing 120. If the antenna 110 is disposed on the outer surface of the housing 120, the antenna may be implemented by using Laser Direct Structuring (LDS), Laser Rapid Prototyping (LRP), and other technologies, and optionally, the outer surface of the antenna 110 is coated with an insulating protective coating to protect the antenna 110; if the antenna 110 is disposed on the inner surface of the housing 120, the antenna 110 may be implemented by LDS, LRP, or may be fixed on the inner surface of the housing 120 by a double-sided tape or glue by using a Flexible Printed Circuit (FPC) antenna.
Fig. 2 is a schematic block diagram of a wear detection device provided in the present application, and referring to fig. 2, the wear detection device 200 includes an antenna 210 and a capacitance detection module 230.
The capacitance detection module 230 includes a capacitance sensing chip 231, the capacitance sensing chip 231 includes a first terminal 231-1 and a fourth terminal 231-4, the first terminal 231-1 of the capacitance sensing chip 231 is electrically connected to the first terminal 210-1 of the antenna 210, and the fourth terminal 231-4 of the capacitance sensing chip 231 may be electrically connected to a processor (not shown). The capacitance detection module 230 is configured to detect a capacitance value of a capacitance formed between the antenna 210 and a human body, and determine a wearing state of the wearing detection apparatus 200 according to the capacitance value. Alternatively, the capacitance sensing chip 231 in the capacitance detection module 230 may be used to detect the electrical signal output from the antenna 210 to detect a capacitance value, and determine the wearing state of the wearing detection apparatus 200 according to the capacitance value. Optionally, the capacitance detection module 230 may further include a processor, the processor may be electrically connected to the fourth terminal 231-4 of the capacitance sensing chip 231, the capacitance sensing chip 231 may be configured to detect the electrical signal output from the antenna 210 to detect a capacitance value, and the processor may determine the wearing state of the wearing detection apparatus 200 according to the capacitance value.
When the wearing detection device 200 is worn, the skin is close to the antenna 210, the capacitance of the capacitor formed between the antenna 210 and the human body is increased, and when the wearing detection device 200 is not worn, the skin is far away from the antenna 210, the capacitance of the capacitor formed between the antenna 210 and the human body is decreased, and the capacitance is very small or almost zero, so that the capacitance detection module 230 can detect the wearing state of the wearing detection device 200 according to the detected variation of the capacitance.
Hereinafter, a mode of determining the wearing state of the wearing detection device 200 according to the present application will be described by taking an example in which the capacitance sensing chip 231 detects a capacitance value and determines the wearing state of the wearing detection device 200 based on the capacitance value.
For example, a preset condition may be set, and if the capacitance value detected by the capacitance sensing chip 231 satisfies the preset condition, the wearing detection apparatus 200 is considered to be worn, and if the capacitance value detected by the capacitance sensing chip 231 does not satisfy the preset condition, the wearing detection apparatus 200 is considered to be not worn.
For example, the predetermined condition may be a predetermined threshold, and correspondingly, if the capacitance value detected by the capacitance sensing chip 231 is greater than or equal to the predetermined threshold, the wearing detection apparatus 200 is considered to be worn, and if the capacitance value detected by the capacitance sensing chip 231 is less than the predetermined threshold, the wearing detection apparatus 200 is considered to be not worn.
For another example, the preset condition may be two preset thresholds, which are recorded as a first preset threshold and a second preset threshold, where the first preset threshold is greater than the second preset threshold: if the capacitance value detected by the capacitance sensing chip 231 is greater than the first preset threshold, the wearing detection device 200 is considered to be worn; if the capacitance value detected by the capacitance sensing chip 231 is smaller than the second preset threshold, it is determined that the wearing detection device 200 is not worn; if the capacitance value detected by the capacitance sensing chip 231 is greater than or equal to the second preset threshold and less than or equal to the first preset threshold, the wearing state of the wearing detection apparatus 200 is considered to be the same as the wearing state in the previous period.
The antenna of the present application may be an antenna for communicating with other devices (e.g., a mobile phone) by wearing the detection apparatus, and is referred to as a first type antenna, or may be an antenna for communicating between wearing detection apparatuses used in pairs, and is referred to as a second type antenna, where the second type antenna may also be referred to as a repeater antenna, and is used to repeat signals from other devices or receive signals forwarded by the wearing detection apparatuses, and the wearing detection apparatus used in pairs may be, for example, a TWS headset.
Taking the TWS headset as an example, any one of the TWS headsets may include the first type antenna and/or the second type antenna, in a possible implementation manner, the TWS headset includes a primary headset and a secondary headset, the primary headset may include the first type antenna and the second type antenna, any one of the first type antenna or the second type antenna may be used as the capacitance detection electrode, and the secondary headset may include the second type antenna, and the second type antenna is used as the capacitance detection electrode. The main earphone receives wireless communication signals sent by other equipment through a first type antenna, the main earphone reserves and carries out subsequent processing on sound channel information belonging to a sound channel of the main earphone, the sound channel information belonging to the auxiliary earphone is forwarded through a second type antenna, the auxiliary earphone reserves and carries out subsequent processing after receiving the sound channel information forwarded by the main earphone, or the main earphone reserves and carries out subsequent processing on the sound channel information belonging to the sound channel of the main earphone, copies the sound channel information of the main earphone and the auxiliary earphone, forwards the sound channel information through the second type antenna, and reserves and carries out subsequent processing on the sound channel information belonging to the sound channel of the auxiliary earphone after the auxiliary earphone receives the sound channel information forwarded by the main earphone. In another possible implementation manner, the TWS headset does not transmit data in a manner that the primary headset forwards channel information of the secondary headset, and there is no difference between the primary headset and the secondary headset, and each headset includes a first antenna, and a second antenna may not be needed, in this case, the first antenna may be used as a capacitance detection electrode, where each headset receives a wireless communication signal from another device through the first antenna, and processes the wireless communication signal.
Illustratively, the first type of antenna and the second type of antenna may be various types of antennas. For example, the first type of antenna may be a bluetooth antenna and the second type of antenna may be a Near Field Magnetic Induction (NFMI) antenna. As another example, both the first type of antenna and the second type of antenna may be bluetooth antennas or NFMI antennas. The bluetooth antenna is an antenna integrating transmission characteristics of a bluetooth module, and can bluetooth connect and transmit and receive wireless communication signals with other devices (e.g., a mobile phone), and the NFMI antenna is an antenna suitable for NFMI technology to communicate, connect and transmit wireless communication signals by coupling a compact low-power and non-propagating magnetic field between the devices.
Therefore, the wearing detection device provided by the application multiplexes the antenna under the condition that the electrode is not additionally arranged, the antenna is used as a capacitance detection electrode, the capacitance detection module is electrically connected to the antenna, the capacitance effect formed between the antenna and the human body is utilized, the wearing state of the wearing detection device is detected by detecting the capacitance value of the capacitance formed between the antenna and the human body through the capacitance detection module, the internal space of the wearing detection device can be effectively reduced under the condition that the wearing detection function of the wearing detection device can be realized, on one hand, the size of the wearing detection device can be reduced, and on the other hand, the manufacturing cost of the wearing detection device can be reduced.
In the present application, the antenna 210 is used for transmitting and receiving signals and may be electrically connected to the radio module. Fig. 3 is another schematic block diagram of a wear detection device provided in the present application. Referring to fig. 3, the wearing detection device 200 includes an antenna 210, a wireless module 220 and a capacitance detection module 230, the wireless module 220 includes a first end 220-1 and a second end 220-2, the first end 220-1 of the wireless module 220 is electrically connected to the first end 210-1 of the antenna 210 and the first end 231-1 of the capacitance sensing chip 231, and the second end 220-2 of the wireless module 220 may be electrically connected to a processor (not shown) in the wearing detection device 200. The wireless module 220 is used to process wireless communication signals transmitted to the antenna 210 or received from the antenna 210. For example, the wireless module 220 may also be used to forward received wireless communication signals; for another example, the wireless module 220 may also be used for modulating or demodulating signals, and encoding or decoding channels, and the like.
It can be seen that the wireless module 220 and the capacitance detection module 230 are both electrically connected to the first end 210-1 of the antenna 210, and a signal transmitted to the first end 210-1 of the antenna 210 can be divided into two paths of signals, where the first path of signal is transmitted between the wireless module 220 and the antenna 210 and can be referred to as a wireless communication signal, and the second path of signal is transmitted between the capacitance detection module 230 and the antenna 210 and can be referred to as a capacitance detection signal. In order to reduce the interference of one of the two signals to the other signal, the wireless communication function and the wearing detection function of the wearing detection apparatus 200 may be implemented simultaneously in a frequency division multiplexing manner, for example. Optionally, the operating frequency of the capacitance detection module 230 is different from the operating frequency of the wireless module 220. Alternatively, the operating frequency of the wireless module 220 may be a high frequency, and the operating frequency of the capacitance detection module 230 may be a low frequency. Illustratively, the operating frequency band of the wireless module 220 may be greater than 1MHz, for example, the operating frequency may be a frequency between 10MHz and 100 MHz. Illustratively, the operating frequency of the capacitance detection module 230 may be a frequency between 1KHz and 1 MHz. Of course, the operating frequency of the wireless module 220 may also be a low frequency, and the operating frequency of the capacitance detecting module 230 may also be a high frequency, which is not limited in this application. It should be understood that the implementation of the wireless communication function and the wearing detection function of the wearing detection apparatus 200 by frequency division multiplexing is only illustrative and should not limit the present application.
Hereinafter, the capacitance detection module of the present application will be further described with reference to fig. 4 to 9, and a wireless module will be described with reference to fig. 10 to 12, based on fig. 3.
In the present application, in order to reduce interference of other signals (e.g., noise signals, signals transmitted between the antenna and the wireless module, etc.) to signals transmitted between the antenna and the capacitance detection module, so as to improve signal quality, a filter circuit may be disposed in the capacitance detection module to filter out interference signals.
Fig. 4 is another schematic block diagram of the wear detection apparatus provided in the present application, and compared with the embodiment shown in fig. 3, the embodiment shown in fig. 4 is added with the first filter circuit 232.
Referring to fig. 4, optionally, the capacitance detection module 230 includes a capacitance sensing chip 231 and a first filter circuit 232, for filtering out a first interference signal, where the first interference signal includes some or all signals except signals transmitted between the antenna 210 and the capacitance detection module 230, the first filter circuit 232 includes a first end 232-1 and a second end 232-2, the first end 232-1 of the first filter circuit 232 is electrically connected to the first end 231-1 of the capacitance sensing chip 231, and the second end 232-2 of the first filter circuit 232 is electrically connected to the first end 210-1 of the antenna 210 and the first end 220-1 of the wireless module 220, respectively.
It is understood that in this embodiment, the first terminal 231-1 of the capacitance sensing chip 231 may be electrically connected between the antenna 210 and the wireless module 220 through the first filter circuit 232. The second terminal 232-2 of the first filter circuit 232 can be understood as one terminal of the capacitance detection module 230 electrically connected with other modules (e.g., the antenna 210, the wireless module 220).
The signal transmitted between the antenna 210 and the capacitance detection module 230 may be a useful signal without a noise signal, or may be a useful signal and a noise signal, which is not limited in the present application, and the useful signal represents a signal actually carrying data.
For example, if the operating frequency of the wireless module 220 is a high frequency and the operating frequency of the capacitance detection module 230 is a low frequency, the first filter circuit 232 may be an inductor for passing the low frequency and blocking the high frequency, so as to reduce the interference of the high frequency signal including the wireless communication signal with the low frequency signal transmitted between the antenna and the capacitance detection module, thereby improving the signal quality. In this case, the first interference signal may be a high frequency signal.
Therefore, the wearing detection device provided by the application is provided with the first filter circuit, so that the first end of the capacitance sensing chip is electrically connected to the antenna through the first filter circuit, interference signals can be effectively filtered, and the signal quality is improved.
In the present application, the capacitance sensing chip 231 charges and discharges the antenna 210, and simultaneously detects the charging and discharging time of the antenna 210 and the voltage variation between the antenna 210 and the human body to obtain the capacitance. The capacitance sensor 231 needs to obtain the charging and discharging time of the antenna 210, and in order to detect the charging and discharging time, a resistor may be disposed in the capacitance detecting module 230, and the speed of the charging and discharging time of the antenna 210 is reduced by increasing the resistor, so as to detect the charging and discharging time, and obtain the capacitance value.
Fig. 5 is another schematic block diagram of the wear detection device provided in the present application, and the embodiment of fig. 5 is compared with the embodiment of fig. 4, and the first resistor 233 is added.
Referring to fig. 5, optionally, the capacitance detection module 230 includes a capacitance sensing chip 231, a first filter circuit 232 and a first resistor 233, and the first resistor 233 is connected in series with the first filter circuit 232. The first terminal 231-1 of the capacitive sensing chip 231 is electrically connected between the wireless module 220 and the antenna 210 through the first resistor 233 and the first filter circuit 232.
Illustratively, the first resistor 233 may have a value ranging from 100 ohms to 1 kilo-ohm (100 Ω to 1K Ω).
It should be understood that the positional relationship between the first resistor 233 and the first filter circuit 232 is not limited, and the first resistor 233 may be disposed between the capacitance sensing chip 231 and the first filter circuit 232, or the first filter circuit 232 may be disposed between the capacitance sensing chip 231 and the first resistor 233, which is not limited herein.
Optionally, with continued reference to fig. 5, the first resistor 233 includes a first terminal 233-1 and a second terminal 233-2, the first terminal 233-1 of the first resistor 233 is electrically connected to the first terminal 231-1 of the capacitance sensing chip 231, and the second terminal 233-2 of the first resistor 233 is electrically connected to the first terminal 232-1 of the first filter circuit 232. That is, in the schematic diagram shown in fig. 5, the first resistor 233 is disposed between the capacitance sensing chip 231 and the first filter circuit 232.
The connection relationship between the first resistor 233 and the first filter circuit 232 shown in fig. 5 is only illustrative and should not limit the present application. Illustratively, the first end 233-1 of the first resistor 233 is electrically connected to the second end 232-2 of the first filter circuit 232, and the second end 233-2 of the first resistor 233 is electrically connected to the first end 210-1 of the antenna 210 and the first end 220-1 of the wireless module 220, respectively, that is, the first filter line 232 is disposed between the capacitance sensing chip 231 and the first resistor 233, and the second end 233-2 of the first resistor 233 can be understood as an end of the capacitance detection module 230 electrically connected to other modules (e.g., the antenna 210 and the wireless module 220).
Therefore, the wearing detection device that this application provided sets up the first resistance of establishing ties with first filter circuit, and the first end with electric capacity sensing chip is connected to the antenna through first resistance and first filter circuit electricity, can reduce the charge-discharge time of antenna through first resistance, is convenient for detect antenna's charge-discharge time to obtain the capacitance value between antenna and the human body.
It should be understood that, in the present application, the capacitance detecting module 230 may not need the first filter circuit 232, and includes the capacitance sensing chip 231 and the first resistor 233, the first end 233-1 of the first resistor 233 is electrically connected to the first end 231-1 of the capacitance sensing chip 231, and the second end 233-2 of the first resistor 233 is electrically connected to the first end 220-1 of the wireless module 220 and the first end 210-1 of the antenna 210, respectively.
In the application, the change of the external environment and the change of factors such as temperature inside the wearing detection device can influence the accuracy of capacitance detection between the antenna and the human body, and in order to improve the accuracy of the capacitance detection, a compensation circuit can be arranged in the capacitance detection device, and one end of the capacitance sensing chip is electrically connected with the compensation circuit so as to realize the compensation function of the circuit. That is to say, the capacitance sensing chip may have two channels, one end (for example, the first end) of the capacitance sensing chip is electrically connected between the antenna and the wireless module to form one of the channels, which is recorded as a capacitance detection channel, the other end of the capacitance sensing chip is electrically connected to the compensation circuit, the compensation function of the circuit is realized through the compensation circuit, and a channel having the compensation function is formed and recorded as a compensation channel. The compensation channel will be described below with reference to fig. 6 to 9.
Fig. 6 is another schematic block diagram of the wear detection device provided in the present application, and compared with the embodiments corresponding to fig. 3 to 5, the compensation circuit 237 is added to the embodiment corresponding to fig. 6.
Referring to fig. 6, optionally, the capacitance detection module 230 further includes a compensation circuit 237, the compensation circuit 237 includes a first terminal 237-1 and a second terminal 237-2, the capacitance sensing chip 231 includes a second terminal 231-2 and a third terminal 231-3, the first terminal 237-1 of the compensation circuit 237 is electrically connected to the third terminal 231-3 of the capacitance sensing chip 231, and the second terminal 237-2 of the compensation circuit 237 is electrically connected to the second terminal 231-2 of the capacitance sensing chip 231.
It should be appreciated that in FIG. 6, the second terminal 237-2 of the compensation circuit 237 and the second terminal 231-2 of the capacitive sense chip 231 are both grounded to achieve an electrical connection between the second terminal 237-2 of the compensation circuit 237 and the second terminal 231-2 of the capacitive sense chip 231, forming a loop between the compensation circuit and the two terminals of the capacitive sense chip. It should be further understood that the second terminal 237-2 of the compensation circuit 237 and the second terminal 231-1 of the capacitive sensing chip 231 may not be grounded, and the second terminal 237-2 of the compensation circuit 237 and the second terminal 231-1 of the capacitive sensing chip 231 may be electrically connected directly or through other elements, so as to finally form a loop between the compensation circuit 237 and the two terminals of the capacitive sensing chip 231, which is not limited in this application.
The compensation circuit 237 can compensate for the influence of a change in external environment and factors such as temperature or humidity inside the wearing detection device on the capacitance detection. Illustratively, the compensation circuit 237 may include a temperature sensor, both ends of which are electrically connected to the second terminal 231-2 and the third terminal 231-3 of the capacitance sensing chip 231, respectively, to compensate for an influence of a change in temperature on capacitance detection. Illustratively, the compensation circuit 237 may also include a compensation capacitor, and two ends of the compensation capacitor are electrically connected to the second terminal 231-2 and the third terminal 231-3 of the capacitive sensing chip 231, respectively, to compensate for the influence of the change of various factors such as temperature and humidity on the capacitance detection.
Therefore, the wearing detection device that this application provided sets up compensating circuit, through the detection of capacitive sensing chip to compensating circuit, realizes the compensation function to the passageway between capacitive sensing chip's the first end and the antenna to reduce external environment and wear inside factors such as temperature and humidity of detection device and to the influence that electric capacity detected, improve the detection accuracy rate of wearing detection device.
In the following, the compensation circuit is further described by taking the compensation circuit including the compensation capacitor as an example.
Fig. 7 is another schematic block diagram of the wear detection apparatus provided in the present application, and compared to the corresponding embodiment of fig. 6, the compensation circuit 237 in the corresponding embodiment of fig. 7 may include the compensation capacitor 234.
Referring to fig. 7, optionally, the compensation circuit 237 includes a compensation capacitor 234, the compensation capacitor 234 includes a first terminal 234-1 and a second terminal 234-2, the first terminal 234-1 of the compensation capacitor 234 is electrically connected to the third terminal 231-3 of the capacitive sensing chip 231, and the second terminal 234-2 of the compensation capacitor 234 is electrically connected to the second terminal 231-2 of the capacitive sensing chip 231. Wherein the first terminal 234-1 of the compensation capacitor 234 can be understood as the first terminal 237-1 of the compensation circuit 237, and the second terminal 234-2 of the compensation capacitor 234 can be understood as the second terminal 237-2 of the compensation circuit 237.
It should be understood that in fig. 7, the second terminal 234-2 of the compensation capacitor 234 and the second terminal 231-2 of the capacitance sensing chip 231 are both grounded to realize the electrical connection between the second terminal 234-2 of the compensation capacitor 234 and the second terminal 231-2 of the capacitance sensing chip 231, forming a loop between the compensation capacitor 234 and the two terminals of the capacitance sensing chip 231. It should be further understood that the second end 234-2 of the compensation capacitor 234 and the second end 231-1 of the capacitance sensing chip 231 may not be grounded, and the second end 234-2 of the compensation capacitor 234 and the second end 231-1 of the capacitance sensing chip 231 may be electrically connected directly or through other elements, so as to finally form a loop between the compensation capacitor 234 and the two ends of the capacitance sensing chip 231, which is not limited in this application.
The capacitance value of the compensation capacitor 234 is fixed and known, and the value range of the capacitance value of the compensation capacitor 234 may be 1pF to 200pF (1pF to 200pF), for example.
In this embodiment, the capacitance sensing chip 231 may detect the capacitance value of the compensation capacitor 234, record the obtained capacitance value of the compensation capacitor 234 as a measured value, and compare the actual value and the measured value of the compensation capacitor 234, so as to estimate the influence degree of the external environment and the inside of the wearable detection device on the capacitance detection, and use the influence degree as a consideration factor of the capacitance value between the current detection antenna and the human body, so as to implement the compensation function on the capacitance detection channel.
For example, the real value of the compensation capacitor is 100 picofarads, the measured value of the compensation capacitor is 80 picofarads, the ratio between the difference between the measured value and the real value is 0.2, and the measured capacitance value between the antenna and the human body is 120 picofarads, so the estimated actual capacitance value between the antenna and the human body may be 120(1+0.2) ═ 144 picofarads, and the estimated capacitance value of 144 picofarads is compared with the preset threshold value to detect the wearing state of the wearing detection device.
Therefore, the wearing detection device provided by the application is provided with the compensation capacitor, the actual value and the measured value of the compensation capacitor are compared through the capacitance sensing chip, the capacitance value between the antenna and the human body which is relatively accurate can be measured, the compensation function of the channel between the first end of the capacitance sensing chip and the antenna is realized, the influence of the external environment, the temperature, the humidity and other factors inside the wearing detection device on the capacitance detection is reduced, and the detection accuracy of the wearing detection device is improved.
The compensation circuit of the application can be provided with a compensation capacitor and also can be provided with the same elements as the capacitance detection channel. For example, if a resistor is disposed in the capacitance detection channel, a resistor may also be disposed in the compensation circuit; for another example, if a filter circuit is disposed in the capacitance detection channel, a filter circuit may be disposed in the compensation circuit.
Fig. 8 is another schematic block diagram of the wear detection device provided in the present application, and the embodiment corresponding to fig. 8 is added with the second resistor 235 compared to the embodiment corresponding to fig. 7.
Referring to fig. 8, optionally, the compensation circuit 237 includes a compensation capacitor 234 and a second resistor 235, the second resistor 235 being connected in series with the compensation capacitor 234. The third terminal 231-3 of the capacitance sensing chip 231 is electrically connected to the compensation capacitor 234 through the second resistor 235.
The present application does not limit the positional relationship between the compensation capacitor 234 and the second resistor 235. For example, the second resistor 235 may be disposed between the capacitance sensing chip 231 and the compensation capacitor 234; as another example, the compensation capacitor 234 may be disposed between the capacitance sensing chip 231 and the second resistor 235.
The connection relationship among the capacitance sensing chip 231, the second resistor 235 and the compensation capacitor 234 will be described by taking the example that the second resistor 235 is disposed between the capacitance sensing chip 231 and the compensation capacitor 234. Illustratively, with continued reference to FIG. 8, the second resistor 235 includes a first terminal 235-1 and a second terminal 235-2, the first terminal 235-1 of the second resistor 235 is electrically connected to the third terminal 231-3 of the capacitance sensing chip 231, the second terminal 235-2 of the second resistor 235 is electrically connected to the first terminal 234-1 of the compensation capacitor 234, the second terminal 234-2 of the compensation capacitor 234 is grounded, and the second terminal 231-2 of the capacitance sensing chip 231 is grounded. The second terminal 234-2 of the compensation capacitor 234 may be understood as the second terminal 237-2 of the compensation circuit 237, and the first terminal 235-1 of the second resistor 235 may be understood as the first terminal 237-1 of the compensation circuit 237.
Therefore, the wearing detection device that this application provided sets up the second resistance with compensation capacitor series connection, and the third end with capacitance sensing chip passes through the second resistance electricity and connects to compensation capacitor, can reduce compensation capacitor's charge-discharge time through the second resistance, is convenient for detect compensation capacitor's charge-discharge time to obtain compensation capacitor's capacitance value.
In this embodiment, in the case that the first resistor 233 is included in the capacitance detection channel of the capacitance detection module, optionally, the resistance value of the second resistor 235 may be the same as the resistance value of the first resistor 233. Therefore, the resistance value of the first resistor of the capacitance detection channel is the same as that of the second resistor of the compensation circuit, so that the difference between the capacitance detection channel and the compensation channel can be reduced, and the detection accuracy is further improved.
Optionally, the compensation circuit 237 may further include a second filter circuit 236, the second filter circuit 236 being connected in series with the compensation capacitor 234.
The present application does not limit the positional relationship between the compensation capacitor 234 and the second filter circuit 236. For example, the second filter circuit 236 may be disposed between the capacitance sensing chip 231 and the compensation capacitor 234, and for example, the compensation capacitor 234 may be disposed between the capacitance sensing chip 231 and the second filter circuit 236.
In connection with the corresponding embodiment of fig. 8, it should be understood that the compensation circuit may include not only the compensation capacitor and the second filter circuit connected in series, but also the compensation capacitor, the second filter circuit and the second resistor connected in series.
Fig. 9 is another schematic block diagram of the wear detection apparatus provided in the present application, and compared with the embodiment of fig. 8, the embodiment of fig. 9 is added with a second filter circuit 236.
Referring to fig. 9, optionally, the compensation circuit 237 includes a second resistor 235, a second filter circuit 236, and a compensation capacitor 234 connected in series. The third terminal 231-3 of the capacitance sensing chip 231 is electrically connected to the compensation capacitor 234 through the second resistor 235 and the second filter circuit 236.
Illustratively, the second filter circuit 236 includes a first terminal 236-1 and a second terminal 236-2, the first terminal 235-1 of the second resistor 235 is electrically connected to the third terminal 231-3 of the capacitance sensor chip 231, the second terminal 235-2 of the second resistor 235 is electrically connected to the first terminal 236-1 of the second filter circuit 236, the second terminal 236-2 of the second filter circuit 236 is electrically connected to the first terminal 234-1 of the compensation capacitor 234, the second terminal 234-2 of the compensation capacitor 234 is grounded, and the second terminal 231-2 of the capacitance sensor chip 231 is grounded. The second terminal 234-2 of the compensation capacitor 234 may be understood as the second terminal 237-2 of the compensation circuit 237, and the first terminal 235-1 of the second resistor 235 may be understood as the first terminal 237-1 of the compensation circuit 237.
Illustratively, the second filter capacitor 236 may be an inductor.
In the case that the first filter circuit 232 is included in the capacitance detection channel of the capacitance detection module, optionally, the inductance value of the second filter circuit 236 may be the same as the inductance value of the first filter circuit 232.
Fig. 10 is a schematic block diagram of a wireless module provided in the present application. Referring to fig. 10, the wireless module 220 includes a wireless communication module 221, specifically configured to process a received or transmitted wireless communication signal, for example, the wireless communication module 221 may be configured to forward the received wireless communication signal, and for example, the wireless communication module 221 may also be configured to modulate or demodulate a signal and encode or decode a channel, and the like. The wireless communication module 221 includes a first end 221-1 and a second end 221-2, the first end 221-1 of the wireless communication module 221 is electrically connected to the first end 210-1 of the antenna 210, and the second end 221-2 of the wireless communication module 221 may be electrically connected to a processor (not shown) of the wear detection device 200. In this embodiment, the first end 221-1 of the wireless communication module 221 may be understood as the first end 220-1 of the wireless module 220 for electrically connecting with the antenna 210 and the capacitance detection module 230.
Fig. 11 is another schematic block diagram of a wireless module provided in the present application, and compared with the corresponding embodiment of fig. 10, the embodiment of fig. 11 is added with a third filter circuit 222.
Referring to fig. 11, the wireless module 220 includes a wireless communication module 221 and a third filter circuit 222 connected in series, the third filter circuit 222 is configured to filter a second interference signal, the second interference signal includes some or all of the signals except the signals transmitted between the antenna 210 and the wireless module 220, the third filter circuit 222 includes a first end 222-1 and a second end 222-2, the second end 222-2 of the third filter circuit 222 is electrically connected to the first end 210-1 of the antenna 210, and the first end 222-1 of the third filter circuit 222 is electrically connected to the first end 221-1 of the wireless communication module 221.
It is understood that, in this embodiment, the wireless communication module 221 is electrically connected to the antenna through the third filter circuit 222. The second terminal 222-2 of the third filter circuit 222 may be understood as the first terminal 220-1 of the wireless module 220.
The signal transmitted between the antenna 210 and the wireless module 220 may be a useful signal without noise signal, or may be a useful signal and a noise signal, which is not limited in this application, and the useful signal represents a signal that actually carries data.
For example, the third filter circuit 222 may filter a direct current signal, and may also filter signals other than the direct current signal in the second interference signal, which is not limited in this application.
Referring to (a) of fig. 12, the wireless module 220 includes a wireless communication module 221 and a third filter circuit 222 connected in series, and optionally, the third filter circuit 222 includes a dc blocking circuit 223 for filtering out a dc signal, the dc blocking circuit 223 includes a first end 223-1 and a second end 223-2, the second end 223-2 of the dc blocking circuit 223 is electrically connected to the first end 210-1 of the antenna 210, and the first end 223-1 of the dc blocking circuit 223 is electrically connected to the first end 221-1 of the wireless communication module 221.
The second terminal 223-2 of the dc blocking circuit 223 may be understood as the second terminal 222-2 of the third filter circuit 222, and the first terminal 223-1 of the dc blocking circuit 223 may be understood as the first terminal 222-1 of the third filter circuit 222.
Illustratively, the dc blocking circuit 223 may be a capacitor for filtering out the dc signal. In fact, the dc blocking circuit 223 can also filter out a part of the low frequency signal.
Referring to (b) of fig. 12, the wireless module 220 includes a wireless communication module 221 and a third filter circuit 222 connected in series, and optionally, the third filter circuit 222 includes a matching circuit 224 for filtering out signals other than the dc signal in the second interference signal, the matching circuit 224 includes a first end 224-1 and a second end 224-2, the second end 224-2 of the matching circuit 224 is electrically connected to the first end 210-1 of the antenna 210, and the first end 224-1 of the matching circuit 224 is electrically connected to the first end 221-1 of the wireless communication module 221.
It is understood that, in this embodiment, the wireless communication module 221 may be electrically connected to the antenna through the matching circuit 224. The second terminal 224-2 of the matching circuit 224 may be understood as the second terminal 222-2 of the third filter circuit 222 and the first terminal 224-1 of the matching circuit 224 may be understood as the first terminal 222-1 of the third filter circuit 222.
For example, if the operating frequency of the wireless module 220 is a high frequency and the operating frequency of the capacitance detection module 230 is a low frequency, the matching circuit 224 may be used to filter out the low frequency signal.
Referring to (c) of fig. 12, the wireless module 220 includes a wireless communication module 221 and a third filter circuit 222 connected in series, and optionally, the third filter circuit 222 includes a dc blocking circuit 223 and a matching circuit 224 connected in series, a first end 224-1 of the matching circuit 224 is electrically connected to the first end 221-1 of the wireless communication module 221, a second end 224-2 of the matching circuit 224 is electrically connected to the first end 223-1 of the dc blocking circuit 223, and a second end 223-2 of the dc blocking circuit 223 is electrically connected to the first end 210-1 of the antenna 210. It is understood that, in this embodiment, the wireless communication module 221 is electrically connected to the antenna 210 through the matching circuit 223 and the third filter circuit 222.
It is understood that in this embodiment, the wireless communication module 221 may be electrically connected to the antenna through the matching circuit 224 and the dc blocking circuit 223. The first terminal 224-1 of the matching circuit 224 may be understood as the first terminal 222-1 of the third filter circuit 222 and the second terminal 223-2 of the dc blocking circuit 223 may be understood as the second terminal 222-2 of the third filter circuit 222.
Fig. 13 and 14 are schematic block diagrams of another wearing detection device provided in the present application. The wireless module 220 in fig. 13 may correspond to the wireless module 220 in fig. 12 (c), and the capacitance detecting module 230 in fig. 13 may correspond to the capacitance detecting module in fig. 5, and for the specific description, reference may be made to the above description, which is not repeated. The wireless module 220 in fig. 14 may correspond to the wireless module 220 in (c) in fig. 12, and the capacitance detection module 230 in fig. 14 may correspond to the capacitance detection module 230 in fig. 9, and specific descriptions may refer to the above description and are not repeated.
Fig. 15 and 16 are another schematic block diagrams of a wear detection device provided herein. It should be understood that the wearing detection device shown in fig. 15 and 16 is only illustrative and should not limit the present application.
The wear detection device shown in fig. 15 may correspond to the wear detection device shown in fig. 13. Referring to fig. 15, the wearing detection device 200 includes an antenna 210, a wireless moduleBlock 220 and capacitance detection module 230. the operating frequency of wireless module 220 is high frequency and the operating frequency of capacitance detection module 230 is low frequency. The wireless module 220 comprises a wireless communication module 221 and a third filter circuit 222, the third filter circuit 222 comprises a matching circuit 224 and a blocking circuit 223, wherein the matching circuit 224 is composed of an inductor L1And a capacitor C2Formed in parallel, the blocking circuit 223 being a capacitor C1The second terminal 223-2 of the dc blocking circuit 223 is electrically connected to the first terminal 210-1 of the antenna 210, the first terminal 223-1 of the dc blocking circuit 223 is electrically connected to the second terminal 224-2 of the matching circuit 224, and the first terminal 224-1 of the matching circuit 224 is electrically connected to the first terminal 221-1 of the wireless communication module 221. The capacitance detection module 230 includes a capacitance sensing chip 231, a first resistor 233 and a first filter circuit 232, wherein the first filter circuit 232 is an inductor L2The first resistor 233 is a resistor R1The second end 232-2 of the first filter circuit 232 is electrically connected to the first end 210-1 of the antenna 210, the first end 232-1 of the first filter circuit 232 is electrically connected to the second end 233-2 of the first resistor 233, and the first end 233-1 of the first resistor 233 is electrically connected to the first end 231-1 of the capacitive sensing chip 231.
The wear detection device shown in fig. 16 may correspond to the wear detection device shown in fig. 14. Referring to fig. 16, the wearing detection device 200 includes an antenna 210, a wireless module 220, and a capacitance detection module 230, and an operating frequency of the wireless module 220 is a high frequency and an operating frequency of the capacitance detection module 230 is a low frequency. The wireless module 220 is the same as that shown in fig. 15 and will not be described again. The capacitance detection module 230 includes a capacitance sensing chip 231, a first resistor 233, a first filter circuit 232, and a compensation circuit 237, wherein a first terminal 231-1 of the capacitance sensing chip 231 is electrically connected to the first terminal 210-1 of the antenna 210 through the first resistor 233 and the first filter circuit 232, and a third terminal 231-3 of the capacitance sensing chip 231 is electrically connected to the compensation circuit 237. The first resistance 233 is R1The first filter circuit 232 is an inductor L2The second end 232-2 of the first filter circuit 232 is electrically connected to the first end 210-1 of the antenna 210, the first end 232-1 of the first filter circuit 232 is electrically connected to the second end 233-2 of the first resistor 233, and the first end 233-1 of the first resistor 233 is electrically connected to the first end 231-1 of the capacitive sensing chip 231. Compensation circuit 237 packageComprises a second resistor 235, a second filter circuit 236 and a compensation capacitor 234, wherein the second resistor 235 is a resistor R2The second filter circuit 236 is an inductor L3The compensation capacitor 234 is a capacitor C3The second terminal 234-2 of the compensation capacitor 234 is grounded, the first terminal 234-1 of the compensation capacitor 234 is electrically connected to the second terminal 236-2 of the second filter circuit 236, the first terminal 236-1 of the second filter circuit 236 is electrically connected to the second terminal 235-2 of the second resistor 235, the first terminal 235-1 of the second resistor 235 is electrically connected to the third terminal 231-3 of the capacitive sensing chip 231, and the second terminal 231-2 of the capacitive sensing chip 231 is grounded, so that the second terminal 231-2 and the third terminal 231-3 of the capacitive sensing chip 231 and the compensation circuit 237 form a loop.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (11)
1. A wear detection device, comprising:
an antenna comprising a first end;
the capacitance detection module is used for detecting the capacitance value of a capacitor formed between the antenna and a human body and determining the wearing state of the wearing detection device according to the capacitance value, and comprises a capacitance sensing chip, wherein the capacitance sensing chip comprises a first end, and the first end of the capacitance sensing chip is electrically connected with the first end of the antenna;
the capacitance detection module further comprises a compensation circuit comprising a first terminal and a second terminal, the capacitance sensing chip comprises a second end and a third end, the first end of the compensation circuit is electrically connected with the third end of the capacitance sensing chip, a second end of the compensation circuit is electrically connected with a second end of the capacitance sensing chip, the compensation circuit comprises a compensation capacitor, the compensation capacitor comprises a first end and a second end, the first end of the compensation capacitor is electrically connected with the third end of the capacitance sensing chip, the second end of the compensation capacitor is electrically connected with the second end of the capacitance sensing chip, the first end of the compensation capacitor is the first end of the compensation circuit, the second end of the compensation capacitor is the second end of the compensation circuit, and the compensation circuit further comprises a second filter circuit which is connected with the compensation capacitor in series.
2. The wear detection device of claim 1, wherein the capacitance detection module further comprises a first filter circuit configured to filter out a first interference signal, the first interference signal comprising a part or all of the signals except the signals transmitted between the antenna and the capacitance detection module, and the first end of the capacitive sensing chip is electrically connected to the first end of the antenna through the first filter circuit.
3. The wear detection device of claim 2, wherein the capacitance detection module further comprises a first resistor connected in series with the first filter circuit.
4. The wear detection device of any one of claims 1-3, wherein the compensation circuit further comprises a second resistor connected in series with the compensation capacitor.
5. The wear detection device of any one of claims 1-3, further comprising a wireless module including a first end, the first end of the wireless module being electrically connected to the first end of the antenna.
6. The wear detection device of claim 5, wherein the wireless module comprises a wireless communication module and a third filter circuit connected in series, the third filter circuit is configured to filter a second interference signal, the second interference signal comprises some or all of the signals except the signals transmitted between the antenna and the wireless module, the wireless communication module comprises a first end, the third filter circuit comprises a first end and a second end, the first end of the wireless communication module is electrically connected to the first end of the third filter circuit, the second end of the third filter circuit is electrically connected to the first end of the antenna, and the second end of the third filter circuit is the first end of the wireless module.
7. The wear detection device of claim 6, wherein the third filter circuit comprises a dc blocking circuit for filtering out dc signals, the dc blocking circuit comprising a first terminal and a second terminal, the second terminal of the dc blocking circuit being electrically connected to the first terminal of the antenna, the first terminal of the dc blocking circuit being electrically connected to the first terminal of the wireless communication module, the first terminal of the dc blocking circuit being the first terminal of the third filter circuit, the second terminal of the dc blocking circuit being the second terminal of the third filter circuit.
8. The wear detection device according to claim 6 or 7, wherein the third filter circuit includes a matching circuit for filtering out signals other than the direct current signal in the second interference signal, the matching circuit includes a first terminal and a second terminal, the second terminal of the matching circuit is electrically connected to the first terminal of the antenna, the first terminal of the matching circuit is electrically connected to the first terminal of the wireless communication module, the first terminal of the matching circuit is the first terminal of the third filter circuit, and the second terminal of the matching circuit is the second terminal of the third filter circuit.
9. The wear detection device of claim 5, wherein the capacitive detection module operates at a different frequency than the wireless module.
10. The wear detection device of claim 9, wherein the operating frequency of the wireless module is a high frequency and the operating frequency of the capacitive detection module is a low frequency.
11. The wear detection device according to any one of claims 1 to 3, characterized in that the wear detection device is a real wireless stereo TWS headset.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910844081.6A CN112468913B (en) | 2019-09-06 | 2019-09-06 | Wearing detection device |
| PCT/CN2020/107768 WO2021042938A1 (en) | 2019-09-06 | 2020-08-07 | Wearing detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910844081.6A CN112468913B (en) | 2019-09-06 | 2019-09-06 | Wearing detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112468913A CN112468913A (en) | 2021-03-09 |
| CN112468913B true CN112468913B (en) | 2022-07-19 |
Family
ID=74807342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910844081.6A Active CN112468913B (en) | 2019-09-06 | 2019-09-06 | Wearing detection device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112468913B (en) |
| WO (1) | WO2021042938A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113193337B (en) * | 2021-04-15 | 2022-11-25 | 安徽华米健康医疗有限公司 | Wearable device and wearing detection method thereof |
| CN113453122B (en) * | 2021-06-29 | 2023-04-25 | 歌尔科技有限公司 | Wear detection method, device, equipment and computer readable storage medium |
| CN113991280B (en) * | 2021-09-30 | 2022-11-01 | 歌尔科技有限公司 | Intelligent wearable device antenna device and intelligent wearable device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101071071A (en) * | 2007-06-16 | 2007-11-14 | 昝昕武 | Engine throttle position sensing method and sensor |
| CN101709988A (en) * | 2009-12-10 | 2010-05-19 | 昝昕武 | Method for sensing automotive oil level and sensor |
| CN103149447A (en) * | 2011-12-06 | 2013-06-12 | 哈尔滨智木科技有限公司 | Detecting method of micro-capacitance of human body |
| CN105703793A (en) * | 2014-11-28 | 2016-06-22 | 鸿富锦精密电子(郑州)有限公司 | Anti-off wearable equipment |
| CN106054273A (en) * | 2016-06-01 | 2016-10-26 | 广东小天才科技有限公司 | Method and system for detecting skin contact of intelligent wearable equipment |
| CN206224416U (en) * | 2016-09-14 | 2017-06-06 | 深圳市汇顶科技股份有限公司 | Pressure-detecting device and electric terminal |
| CN206671786U (en) * | 2017-03-22 | 2017-11-24 | 广州七喜集团有限公司 | Wrist-watch and its service platform with anti-drop function |
| CN109496395A (en) * | 2018-09-28 | 2019-03-19 | 深圳市汇顶科技股份有限公司 | A kind of circuit and electronic equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202085144U (en) * | 2011-08-26 | 2011-12-21 | 江苏惠通集团有限责任公司 | 3D (three-dimensional) glasses power control circuit |
| CN103138794B (en) * | 2011-11-28 | 2015-02-11 | 启碁科技股份有限公司 | Radio frequency device and wireless communication device |
| US9160063B2 (en) * | 2012-01-19 | 2015-10-13 | Nike, Inc. | Wearable device assembly having solder mask |
| CN211123042U (en) * | 2019-08-16 | 2020-07-28 | 广州杰赛科技股份有限公司 | Dismantle detection device and wearable equipment |
| CN110568271B (en) * | 2019-08-16 | 2021-06-18 | 广州杰赛科技股份有限公司 | Wearable device and wearing state detection method thereof |
-
2019
- 2019-09-06 CN CN201910844081.6A patent/CN112468913B/en active Active
-
2020
- 2020-08-07 WO PCT/CN2020/107768 patent/WO2021042938A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101071071A (en) * | 2007-06-16 | 2007-11-14 | 昝昕武 | Engine throttle position sensing method and sensor |
| CN101709988A (en) * | 2009-12-10 | 2010-05-19 | 昝昕武 | Method for sensing automotive oil level and sensor |
| CN103149447A (en) * | 2011-12-06 | 2013-06-12 | 哈尔滨智木科技有限公司 | Detecting method of micro-capacitance of human body |
| CN105703793A (en) * | 2014-11-28 | 2016-06-22 | 鸿富锦精密电子(郑州)有限公司 | Anti-off wearable equipment |
| CN106054273A (en) * | 2016-06-01 | 2016-10-26 | 广东小天才科技有限公司 | Method and system for detecting skin contact of intelligent wearable equipment |
| CN206224416U (en) * | 2016-09-14 | 2017-06-06 | 深圳市汇顶科技股份有限公司 | Pressure-detecting device and electric terminal |
| CN206671786U (en) * | 2017-03-22 | 2017-11-24 | 广州七喜集团有限公司 | Wrist-watch and its service platform with anti-drop function |
| CN109496395A (en) * | 2018-09-28 | 2019-03-19 | 深圳市汇顶科技股份有限公司 | A kind of circuit and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021042938A1 (en) | 2021-03-11 |
| CN112468913A (en) | 2021-03-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112468913B (en) | Wearing detection device | |
| EP1821432B1 (en) | Information transmission through-human-body system and transmitter/receiver | |
| EP2241033B1 (en) | Electrode diversity for body-coupled communication systems | |
| US9320433B2 (en) | Living body detection sensor, communication apparatus having living body detection sensor, metal detection sensor | |
| JP4524647B2 (en) | COMMUNICATION DEVICE, COMMUNICATION METHOD, AND PROGRAM | |
| CN104023294A (en) | Interface multiplexing apparatus in terminal, and adaptor panel | |
| WO2022134901A1 (en) | Signal transceiving apparatus, electronic device, wearable device, and wireless earphone | |
| CN113810809B (en) | Sensor module and earphone | |
| WO2009104467A1 (en) | Electronic device for electric field communication | |
| JP4750857B2 (en) | Communication systems that use frequencies according to information security protection and transmission distance | |
| CN109040896A (en) | A kind of earphone and apart from detection cut-in method | |
| US11509403B2 (en) | Human body communication device and operating method of the same | |
| CN114402537A (en) | Enhanced edge detection power line communication | |
| WO2010133991A1 (en) | Method for operating an acoustic system and wearable acoustic device | |
| CN109714076B (en) | Wireless fidelity communication circuit and electronic equipment | |
| CN203554423U (en) | Anti-interference audio frequency reception device and anti-interference audio frequency reception system | |
| CN117135568B (en) | UWB wireless earphone pose sensing measurement method based on single base station | |
| WO2024012471A1 (en) | Human body communication-based electronic device, and communication apparatus and system | |
| CN116647784A (en) | Communication device for realizing full duplex communication by single wire | |
| US10715189B2 (en) | Electronic device | |
| WO2019015525A1 (en) | Hearing aid compatible mobile terminal structure | |
| CN108649706A (en) | A kind of wireless charging circuit and wearable device | |
| CN108711894A (en) | A kind of wireless charging circuit and wearable device | |
| CN108695954A (en) | A kind of wireless charging circuit and wearable device | |
| TH35167A (en) | Cassette adapter For cell phone |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |