A pedometer sensor circuit structure

Abstract

The utility model relates to sensor technical field, especially step counting sensor circuit structure, including main control module, motion sensing circuit, dynamic storage module and power management unit, motion sensing circuit includes inertia measurement unit and the interrupt signal output end for awakening main control module under the working condition that connect in main control module data input end, the slice selection end electricity of dynamic storage module is connected in the interrupt signal output end of motion sensing circuit, the power management unit is equipped with charging circuit and is used for the linear voltage stabilizing unit of main control module, motion sensing circuit, dynamic storage module stable power supply, the utility model aims at reducing circuit power consumption, improves the continuous working time to improve data storage extension ability.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to a pedometer sensor circuit structure. Background Technology

[0002] With the popularization of health monitoring technology, wearable pedometers have become an important tool for sports and health management. These devices need to meet the core requirements of miniaturization, long battery life, and high accuracy. Their circuit design faces many bottlenecks, particularly regarding power consumption. Traditional solutions use a separate MCU and sensor architecture, requiring the MCU to continuously poll sensor data, resulting in the system being in a high-power state for extended periods. Meanwhile, button batteries typically have low capacity, making it difficult to support continuous operation for more than 30 days.

[0003] Furthermore, existing step counting chip circuits (such as ADXL345) only provide raw acceleration data and rely on the main control chip to run the step counting algorithm, which greatly increases the MCU's computing load and power consumption; a few sensors with integrated algorithms (such as BMA400) are expensive and lack flexible data storage expansion capabilities. Utility Model Content

[0004] The main objective of this invention is to provide a pedometer sensor circuit structure that aims to reduce circuit power consumption, increase continuous working time, and enhance data storage expansion capabilities.

[0005] To achieve the above objectives, this utility model proposes a pedometer sensor circuit structure, including a main control module, a motion sensing circuit, a dynamic storage module, and a power management unit.

[0006] The motion sensing circuit includes an inertial measurement unit connected to the data input terminal of the main control module and an interrupt signal output terminal for waking up the main control module in the working state.

[0007] The chip select terminal of the dynamic storage module is electrically connected to the interrupt signal output terminal of the motion sensing circuit.

[0008] The power management unit includes a charging circuit and a linear voltage regulator unit for providing stable power to the main control module, motion sensing circuit, and dynamic storage module.

[0009] In one embodiment of this application, the main control module is provided with a low-power clock unit for maintaining the time base of the main control module's sleep mode when no interrupt signal is received from the interrupt signal output terminal.

[0010] In one embodiment of this application, the main control module is configured with a wireless connection module for connecting to external devices and performing remote wireless data transmission.

[0011] In one embodiment of this application, the power management unit is connected to a battery monitoring circuit composed of a voltage divider resistor network. The input terminal of the battery monitoring circuit is connected to the battery component built into the power management unit, and the output terminal is connected to the main control module.

[0012] In one embodiment of this application, the charging circuit is provided with a temperature protection unit, and is provided with a status indication connection terminal for sending the charging status to the main control module and a standby control connection terminal for receiving control commands from the main control module to activate the trickle charging mode of the battery assembly after charging is completed.

[0013] By adopting the above technical solution, this utility model has the following advantages:

[0014] The pedometer sensor circuit structure can be divided into a main control module for managing and controlling different data, a motion sensing circuit for measuring step count and other data, a dynamic storage module electrically connected to the motion sensing circuit and receiving data measured by the motion sensing circuit in real time, and a power management unit for controlling, managing, and ensuring the temperature operation of each circuit module. The motion sensing circuit is equipped with an inertial measurement unit that can test step count data. The inertial measurement unit is connected to the data input terminal of the main control module and can calculate the user's step count through a built-in system algorithm. The motion sensing circuit also has an interrupt signal output terminal relative to the main control module. The main control module can enter a low-power standby state when not in operation, which can effectively reduce circuit power consumption and improve the continuous working time of the circuit. When the inertial measurement unit of the motion sensing circuit detects user movement, the interrupt signal output terminal will output an interrupt signal to activate the main control module's working state, thereby starting the main control module. The above structure can ensure the service life of the sensor circuit.

[0015] The dynamic storage module is electrically connected to the interrupt signal output terminal of the motion sensing circuit. It can continuously store data when the motion sensing circuit starts working, which can effectively prevent data loss when the main control module fails to receive and process data. By dynamically storing data through the dynamic storage module, the data storage expansion capability of the sensor circuit can be effectively improved, ensuring the accuracy of data testing.

[0016] The power management unit is equipped with a charging circuit to facilitate the use of the sensor and enable the entire sensor to be repeatedly charged for operation, effectively improving the user experience. The linear voltage regulator unit is connected to each power-consuming module circuit of the sensor circuit to ensure that each module circuit can operate stably. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the circuit structure of the pedometer sensor of this utility model;

[0019] Figure 2 This is a schematic diagram of the motion sensing circuit of the step counting sensor circuit of this utility model;

[0020] Figure 3 This is a schematic diagram of the dynamic storage module of the pedometer sensor circuit structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the charging circuit of the pedometer sensor circuit of this utility model;

[0022] Figure 5 This is a schematic diagram of the linear voltage regulator unit of the pedometer sensor circuit structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the battery assembly of the pedometer sensor circuit structure of this utility model.

[0024] Explanation of icon numbers:

[0025] 1. Main control module; 2. Motion sensing circuit; 3. Dynamic storage module; 4. Power management unit; 5. Charging circuit; 6. Linear voltage regulator unit; 7. Battery assembly.

[0026] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0028] The following is in conjunction with the appendix Figure 1-6 The present invention will be further described below.

[0029] To achieve the above objectives, this utility model proposes a pedometer sensor circuit structure, comprising a main control module 1, a motion sensing circuit 2, a dynamic storage module 3, and a power management unit 4.

[0030] The motion sensing circuit 2 includes an inertial measurement unit connected to the data input terminal of the main control module 1 and an interrupt signal output terminal for waking up the main control module 1 in the working state;

[0031] The chip select terminal of the dynamic storage module 3 is electrically connected to the interrupt signal output terminal of the motion sensing circuit 2;

[0032] The power management unit 4 is equipped with a charging circuit 5 and a linear voltage regulator unit 6 for providing stable power to the main control module 1, motion sensing circuit 2, and dynamic storage module 3.

[0033] The pedometer sensor circuit structure can be divided into a main control module 1 for managing and controlling different data, a motion sensing circuit 2 for measuring step count and other data, a dynamic storage module 3 for receiving data measured by the motion sensing circuit 2 in real time, and a power management unit 4 for controlling, managing, and ensuring the temperature operation of each circuit module. The motion sensing circuit 2 is equipped with an inertial measurement unit that can test step count data. The inertial measurement unit is connected to the data input terminal of the main control module 1 and can calculate the user's step count through a built-in system algorithm. The motion sensing circuit 2 is also equipped with an interrupt signal output terminal relative to the main control module 1. The main control module 1 can enter a low-power standby state when not in operation, which can effectively reduce circuit power consumption and improve the continuous working time of the circuit. When the inertial measurement unit of the motion sensing circuit 2 detects user movement, the interrupt signal output terminal will output an interrupt signal to activate the working state of the main control module 1, thereby starting the main control module 1. The above structure can ensure the service life of the sensor circuit.

[0034] The dynamic storage module 3 is electrically connected to the interrupt signal output terminal of the motion sensing circuit 2. It can continuously store data when the motion sensing circuit 2 starts working, which can effectively prevent data loss when the main control module 1 fails to receive and process data. By dynamically storing data through the dynamic storage module 3, the data storage expansion capability of the sensor circuit can be effectively improved, and the accuracy of data testing can be guaranteed.

[0035] The power management unit 4 is equipped with a charging circuit 5, which makes the sensor easy to use and allows the entire sensor to be repeatedly charged and operated, effectively improving the user experience. The linear voltage regulator unit 6 is connected to each power-consuming module circuit of the sensor circuit to ensure that each module circuit can operate stably.

[0036] In one embodiment of this application, the main control module 1 is provided with a low-power clock unit for maintaining the time base of the main control module 1 in sleep mode when no interrupt signal is received from the interrupt signal output terminal. By using the low-power clock unit, the main control module 1 can save power to the greatest extent and avoid consuming a lot of energy in the non-working state. At the same time, it can enable the main control module 1 to start up quickly after receiving an interrupt signal, ensuring the sensor test accuracy and test precision.

[0037] In addition to the low-power clock, the main control module 1 is also equipped with BLE radio frequency, which uses a 32MHz crystal oscillator to provide the radio frequency clock and can be used for matching networks.

[0038] In one embodiment of this application, the main control module 1 is configured with a wireless connection module for connecting to external devices and performing remote wireless data transmission.

[0039] This allows the data processed by the main control module 1 to be sent to external devices (such as mobile phones) via the wireless connection module. Users can then view their current motion status through these external devices, which facilitates smoother movement and effectively improves the user experience.

[0040] In one embodiment of this application, the power management unit 4 is connected to a battery monitoring circuit composed of a voltage divider resistor network. The input terminal of the battery monitoring circuit is connected to the battery component 7 built into the power management unit 4, and the output terminal is connected to the main control module 1.

[0041] The battery monitoring circuit is equipped with voltage divider resistors (R29 / R30) and ADC detection relative to the main control module 1. Through the cooperation of the above structures, the stable use status of the battery in the circuit can be effectively guaranteed, and the sensor circuit can work stably and safely.

[0042] In one embodiment of this application, the charging circuit 5 is provided with a temperature protection unit, and is provided with a status indication connection terminal for sending the charging status to the main control module 1 and a standby control connection terminal for receiving the control command of the main control module 1 to activate the trickle charging mode of the battery assembly 7 after charging is completed.

[0043] The charging circuit 5 is equipped with an NTC as a stable protection unit to ensure the stability of the circuit structure during charging. The charging circuit 5 is also equipped with a STAT (status indicator connection terminal), which allows the main control module 1 to determine the current charging status based on the pin level changes of the STAT. When charging is complete, the charging circuit 5 can send a control command to the standby control connection terminal, which is determined by the main control module 1, so that the charging mode is converted to a trickle charging mode that can be regarded as a standby state. Through the above structure, the battery life can be effectively protected and the sensor can have a longer service life.

[0044] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0045] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pedometer sensor circuit structure, characterized in that, include: Main control module; The motion sensing circuit includes an inertial measurement unit connected to the data input terminal of the main control module and an interrupt signal output terminal for waking up the main control module in the working state. A dynamic storage module, wherein the chip select terminal of the dynamic storage module is electrically connected to the interrupt signal output terminal of the motion sensing circuit; The power management unit includes a charging circuit and a linear voltage regulator unit for providing stable power to the main control module, motion sensing circuit, and dynamic storage module.

2. The pedometer sensor circuit structure according to claim 1, characterized in that, The main control module is equipped with a low-power clock unit for maintaining the time base of the main control module's sleep mode when no interrupt signal is received from the interrupt signal output terminal.

3. The pedometer sensor circuit structure according to claim 1, characterized in that, The main control module is equipped with a wireless connection module for connecting to external devices and performing remote wireless data transmission.

4. The pedometer sensor circuit structure according to claim 1, characterized in that, The power management unit is connected to a battery monitoring circuit composed of a voltage divider resistor network. The input of the battery monitoring circuit is connected to the battery module built into the power management unit, and the output is connected to the main control module.

5. The pedometer sensor circuit structure according to claim 4, characterized in that, The charging circuit is equipped with a temperature protection unit, and is provided with a status indication connection terminal for sending the charging status to the main control module and a standby control connection terminal for receiving control commands from the main control module after charging is completed to activate the trickle charging mode of the battery assembly.

Images