Abstract: A gas detection probe includes a lead electrode and a conductive terminal. The conductive terminal has a first terminal end and a second terminal end, with the first terminal end has a first tip and the second terminal end has a second tip. Along the extension direction of the conductive terminal, the lead electrode and the first terminal end are on the same side of the second tip, and the lead electrode and the second terminal end are on the same side of the first tip; or, the lead electrode and the second terminal end are on different sides of the first tip, and the lead electrode is perpendicular to the extension direction of the conductive terminal. This can reduce deformation of the lead electrode caused by external forces. This disclosure also provides a sensor and a gas detector.

Abstract: Provide is a wearable device comprising at least two electrodes and a wearable structure. The at least two electrodes are configured to fit against the skin of a human body to collect an electrocardiogram (ECG) signal of the human body, and the wearable structure is configured to carry the at least two electrodes and fit the at least two electrodes to a waist region of the human body. The at least two electrodes are spaced apart on the wearable structure, and disposed on two sides of a mid-sagittal plane of the human body when the human body wears the wearable structure.

Abstract: The present disclosure provides a wearable device. The wearable device comprises at least two electrodes, configured to be attached to a human skin to collect an electrocardiograph (ECG) signal of a human body; a wearable structure, configured to carry the at least two electrodes and attach the at least two electrodes to two sides of a midsagittal plane of the human body; and a processor, configured to determine a heart rate variability (HRV) of the human body based on the ECG signal, and determine a physical state of the human body based at least on the HRV.

Abstract: Method and system to improve keyboard input in an automated test environment. The method includes determining a keyboard layout. The method also includes receiving an input, wherein the input comprises a plurality of characters. The method further includes processing the input to determine an input delay between each character of the plurality of characters and entering each character of the plurality of characters with the determined input delay between each character.

Abstract: A gas detection probe includes a shell and a detection element. The detection element includes a first element and a second element. The shell includes a first shell portion, a second shell portion, and a third shell portion. The second shell portion and the third shell portion are mated and formed on an outer periphery of the first shell portion. The shell has a first cavity and a second cavity. The first shell portion is in sealing engagement with the third shell portion. The second shell portion is provided with a guide hole portion communicated with the second cavity. The first element is accommodated in the first cavity. The second element is accommodated in the second cavity. The gas detection probe of the present disclosure is more beneficial to realize miniaturization. A manufacturing method of the gas detection probe is also disclosed.

Abstract: The embodiments of the present disclosure disclose a signal measurement circuit and method. The signal measurement circuit include: a plurality of electrodes configured to be attached to a human body and collect physiological signals of the human body; a contact impedance detection circuit electrically connected with the plurality of electrodes, the contact impedance detection circuit being configured to measure a contact impedance between each of the plurality of electrodes and the human body; and a switching circuit configured to control a conduction state between the plurality of electrodes and the contact impedance detection circuit, such that only a portion of the plurality of electrodes are in the conduction state with the contact impedance detection circuit simultaneously.

Abstract: Disclosed is a signal measuring device including: at least one electrode configured to contact with a human body to collect an electromyographic (EMG) signal of the human body in a target frequency range; an alternating current (AC) excitation source electrically connected to the at least one electrode, the AC excitation source being configured to provide an excitation signal at a first frequency to generate a detection signal reflecting a contact impedance between the at least one electrode and the human body; and a gain circuit configured to provide a gain for the EMG signal and the detection signal. In the present disclosure, by providing the gain circuit, gains are provided for the EMG signal and the detection signal collected so as to improve strengths and qualities of the EMG signal and the detection signal, and enable an accurate monitoring of the signal measuring device.

Abstract: Embodiments of the present disclosure provide a signal acquisition system including a wearable body; a plurality of electrodes fixed on the wearable body and in contact with the skin of a user, and a processing circuit. The plurality of electrodes include a first electrode set and a second electrode set, and the first electrode set is configured to acquire a physiological signal and the second electrode set is configured to acquire a detection signal. The processing circuit configured to eliminate, based on the detection signal, motion artifacts in the physiological signal.

Abstract: Embodiments of the present disclosure provide a signal processing system and method. The signal processing system includes a group of electrodes for fitting the human body to collect physiological signals; and a processing circuit for reading the physiological signals in a time-sharing mode, the processing circuit has different input impedances in different time periods, and the physiological signals read by the processing circuit include motion artifact signals of different proportions, and the processing circuit processes the physiological signals based on the motion artifact signals of different proportions.

Abstract: Embodiments of the present disclosure disclose a signal measurement method and circuit, comprising: receiving a detection signal, the detection signal reflecting a difference between two contact impedances, each of which is a contact impedance between one of two electrodes and a human body, and the two electrodes being affixed to the human body and being configured to collect a physiological signal of the human body; and determining an indicator parameter value reflecting a quality of the physiological signal based on the detection signal. The signal measurement method and circuit provided in the present disclosure can detect the contact impedance between each of the two electrodes and the human body in real-time, and determine, based on the contact impedance, state between each of the two electrodes and the human body, and thus ensure that a physiological signal collected by the electrodes have a high quality.

Abstract: An electrocardio monitoring system and method are provided. The electrocardio monitoring system includes at least two sets of electrocardio channels and a processing circuit. Each of the at least two sets of electrocardio channels includes at least two electrodes, and each of the at least two sets of electrocardiographic channels is configured to collect signals from a human body through the at least two electrodes, respectively. The processing circuit is configured to extract the electrocardio signal from the signals collected by the at least two sets of electrocardiographic channels.

Abstract: Embodiments of the present disclosure provide a signal acquisition device including a wearable object provided with a sensor, a sub-base, and a mother base fixed on the wearable object. The wearable object is configured to be worn on a user and acquire a physiological signal of the user via the sensor. The sub-base is configured to accommodate a circuit structure. The circuit structure includes a power supply circuit and a signal transmitter, the power supply circuit is configured to supply power to the sensor, and the signal transmitter is configured to send the physiological signal to an external device. The sub-base is detachably connected with the mother base. The mother base includes a transmission interface. When the mother base is connected with the sub-base, the circuit structure is electrically connected with the sensor via the transmission interface.

Abstract: Embodiments of the present disclosure provide a method for monitoring user's running and a signal collection device. The method may include: obtaining an electromyographic (EMG) signal of a leg muscle of a user when the user is running; identifying a plurality of feature values of the EMG signal in a plurality of target time intervals; and in response to that the plurality of feature values satisfy a preset condition, generating running feedback information.

Abstract: Disclosed is a physiological signal acquisition device. The physiological signal acquisition device may include a first insulating membrane, first absorbent members, and at least two electrodes. At least two first guide grooves may be arranged in a first direction on the first insulating membrane, and the at least two first guide grooves may be insulated from each other. The first absorbent members may be arranged in the at least two first guide grooves and configured to absorb moisture. The at least two electrodes may be configured to contact a skin and acquire physiological signals, wherein the at least two electrodes may cover the at least two first guide grooves and may be attached to surfaces of the first absorbent members near the skin.

Abstract: The embodiments of the present disclosure are for a signal processing circuit. The signal processing circuit includes an analog circuit. The analog circuit is used for processing an initial signal it receives. The initial signal includes a target signal and a noise signal. The analog circuit includes a first processing circuit and a second processing circuit. The first processing circuit is used to increase a ratio of the target signal to the noise signal, and output a first processed signal. The second processing circuit is used to amplify the first processed signal. A gain multiple of the second processing circuit to the first processed signal varies with a frequency of the first processed signal. The first processing circuit includes a common mode signal suppression circuit used to suppress a common mode signal in the initial signal, a low-pass filter circuit, and a high-pass filter circuit.

Abstract: An end cap assembly for a strap is provided. The end cap assembly includes an end closure and slider. The end closure has a base, a pair of spaced apart arms extending from the base, and a locking element connected to at least one of the pair of spaced apart arms. The base and pair of spaced apart arms define a holder for receiving the strap. The slider has a body defining a cavity from a first to a second end of the body, the cavity sized to receive the strap. The slider is moveable between an unlocked and a locked position. In the unlocked position, the slider body is slideable along a length of the strap. In the locked position, a first end of the slider is adjacent to the base of the end closure and the locking element of the end closure is engaged with the slider.

Abstract: Embodiments of the present disclosure provide a signal acquisition circuit. The signal acquisition circuit includes a differential amplifier, a first electrode, a second electrode, a first negative capacitance circuit, and a second negative capacitance circuit. The first electrode is connected to a first input terminal of the differential amplifier through a first lead, and the second electrode is connected to a second input terminal of the differential amplifier through a second lead. The first negative capacitance circuit is electrically connected to the first lead and ground, and the second negative capacitance circuit is electrically connected to the second lead and the ground. Both the first negative capacitance circuit and the second negative capacitance circuit exhibit a negative capacitance effect.

Abstract: A formation method for liquid rubber composite nodes with middle damping holes is provided. The formation method includes adding a middle spacer sleeve between an outer sleeve and a mandrel, bonding the middle spacer sleeve and the mandrel together through rubber vulcanization, and assembling the integrated middle spacer sleeve and the mandrel into the outer sleeve; forming damping through holes which penetrate through the mandrel on the mandrel; hollowing the middle spacer sleeve to form a plurality of spaces; after vulcanization, forming a plurality of interdependent liquid cavities by using rubber and the plurality of spaces; and arranging liquid in the plurality of liquid cavities and communicating the plurality of liquid cavities through the damping through holes.

Abstract: The embodiments of the present disclosure provide a signal processing circuit and a signal processing method. The signal processing circuit may include a control circuit, a switch circuit, an analog circuit, and at least two signal acquisition circuits. The at least two signal acquisition circuits may be configured to acquire at least two-channel target signals. The switch circuit may be configured to control conduction between the at least two signal acquisition circuits and the analog circuit, so that the target signal acquired by a part of the at least two signal acquisition circuits may be transmitted to the analog circuit at the same time. The analog circuit may be configured to process the received target signal. The control circuit may be configured to receive the processed target signal and sample the processed target signal.

Abstract: The embodiments of the present disclosure are for a signal processing circuit. The signal processing circuit includes an analog circuit. The analog circuit is used for processing an initial signal it receives. The initial signal includes a target signal and a noise signal. The analog circuit includes a first processing circuit and a second processing circuit. The first processing circuit is used to increase a ratio of the target signal to the noise signal, and output a first processed signal. The second processing circuit is used to amplify the first processed signal. A gain multiple of the second processing circuit to the first processed signal varies with a frequency of the first processed signal. The first processing circuit includes a common mode signal suppression circuit used to suppress a common mode signal in the initial signal, a lowpass filter circuit, and a high-pass filter circuit.