Method and apparatus for determining pressure reference value, and chip and electronic device

An apparatus for determining a pressure reference value, applicable to an electronic device equipped with a pressure sensor, comprising:

• a processor and a memory, wherein the memory is configured to store a computer program, and the processor is configured to, when calling and running the computer program stored in the memory, perform operations of:
• consecutively acquiring N pressure signals by the pressure sensor, and acquiring consecutive N pressure values on the basis of the N pressure signals;
• and
• determining a latest pressure reference value on the basis of the consecutive N pressure values and time characteristics of the consecutively acquired N pressure signals for replacing a current pressure reference value;
• wherein each of the pressure values is a difference between a sampling value corresponding to a pressure signal and the current pressure reference value, and the consecutively acquired N pressure signals are acquired within a duration in which a pressure is applied to the pressure sensor once, N being a positive integer greater than 0
• wherein determining the latest pressure reference value on the basis of the consecutive N pressure values and the time characteristics of the consecutively acquired N pressure signals for replacing the current pressure reference value comprises:
• identifying a magnitude relationship between an i-th pressure value and a first pressure threshold and/or a second pressure threshold, wherein the first pressure threshold is used to indicate whether the pressure sensor is subjected to a positive pressure from outside to inside, and the second pressure threshold is used to indicate whether the pressure sensor is subjected to a negative pressure from inside to outside;
• and
• updating a positive pressure time T1i according to T1i=Ti−1+predetermined time length in response to the i-th pressure value being greater than the first pressure threshold, wherein the positive pressure time T1i is used to indicate a duration in which the pressure signal is at a positive pressure;
• and determining a sampling value corresponding to the i-th pressure value as the latest pressure reference value in response to the positive pressure time T1i being greater than a first time threshold for replacing the current pressure reference value, or
• updating a negative pressure time T2i according to T2i=T2i−1+predetermined time length in response to the i-th pressure value being less than the second pressure threshold, wherein the negative pressure time T2i is used to indicate a duration in which the pressure signal is at a negative pressure;
• and determining a sampling value corresponding to the i-th pressure value as the latest pressure reference value in response to the negative pressure time T2i being greater than a second time threshold for replacing the current pressure reference value;
• wherein i is a positive integer greater than 0 and less than or equal to N.

An electronic device, comprising a pressure sensor and an apparatus, wherein the electronic device provides a human-computer interaction gesture interface for a user, and the electronic device is configured to identify, based on a pressure signal, a gesture operation of the user on the interface, the apparatus comprises:

• a processor configured to call and run a program unit from a memory;
• to perform operations of:
• consecutively acquiring N pressure signals by a pressure sensor, and acquiring consecutive N pressure values on the basis of the N pressure signals;
• and
• determining a latest pressure reference value on the basis of the consecutive N pressure values and time characteristics of the consecutively acquired N pressure signals for replacing a current pressure reference value;
• wherein each of the pressure values is a difference between a sampling value corresponding to a pressure signal and the current pressure reference value, and the consecutively acquired N pressure signals are acquired within a duration in which a pressure is applied to the pressure sensor once, N being a positive integer greater than 0,
• wherein determining the latest pressure reference value on the basis of the consecutive N pressure values and the time characteristics of the consecutively acquired N pressure signals for replacing the current pressure reference value comprises:
• identifying a magnitude relationship between an i-th pressure value and a first pressure threshold and/or a second pressure threshold, wherein the first pressure threshold is used to indicate whether the pressure sensor is subjected to a positive pressure from outside to inside, and the second pressure threshold is used to indicate whether the pressure sensor is subjected to a negative pressure from inside to outside;
• and
• updating a positive pressure time T1i according to T1i=T1i−1+predetermined time length in response to the i-th pressure value being greater than the first pressure threshold, wherein the positive pressure time T1i is used to indicate a duration in which the pressure signal is at a positive pressure;
• and determining a sampling value corresponding to the i-th pressure value as the latest pressure reference value in response to the positive pressure time T1i being greater than a first time threshold for replacing the current pressure reference value, or
• updating a negative pressure time T2i according to T2i=T2i−1+predetermined time length in response to the i-th pressure value being less than the second pressure threshold, wherein the negative pressure time T2i is used to indicate a duration in which the pressure signal is at a negative pressure;
• and determining a sampling value corresponding to the i-th pressure value as the latest pressure reference value in response to the negative pressure time T2i being greater than a second time threshold for replacing the current pressure reference value;
• wherein i is a positive integer greater than 0 and less than or equal to N.