A low power consumption vibration sensor module

Abstract

The utility model relates to sensor technical field discloses a kind of low-power consumption vibration sensor module, it includes: the power management unit being equipped with normally open power output end and controlled mains output end, vibration wake-up unit, main control unit and multi-axis vibration sensor, controlled mains output end of power management unit is connected with main control unit and multi-axis vibration sensor;Multi-axis vibration sensor generates vibration electric signal and is connected with the input end of vibration wake-up unit and main control unit;Normally open power output end of power management unit is connected with the input end of vibration wake-up unit, and the wake-up output signal of vibration wake-up unit is connected with power management unit.The utility model designs sensor to reduce the normally open time of main control unit and multi-axis vibration sensor by vibration wake-up unit, to reduce average power consumption.Thereby, through multiple wake-up mode, improve the accuracy and adaptability of wake-up.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to a low-power vibration sensor module. Background Technology

[0002] In existing technologies, vibration sensor modules are often deployed in environments without a continuous external power supply, so power consumption control becomes the key factor determining their lifespan and practicality.

[0003] In existing technologies, sensors and their processing units (MCUs) continuously operate to capture vibration events, ensuring timely response but consuming extremely high power and rapidly depleting the battery. To reduce power consumption, a common practice is to keep the main control system in a long-term sleep state and wake it up using a simple level or frequency detection circuit. However, these simple wake-up circuits often have limited sensitivity, potentially missing weak but crucial vibration signals; they also have poor anti-interference capabilities, easily causing false wake-ups due to environmental noise (such as electrical noise or slight touches), leading to frequent and meaningless system startups, which actually increases overall power consumption.

[0004] The sensor designed by CN201120388964.X has high power consumption and poor anti-interference ability. Summary of the Invention

[0005] This invention addresses the problems of existing vibration sensors, such as limited sensitivity that may miss weak but critical vibration signals, poor anti-interference ability, and susceptibility to false wake-ups due to environmental noise, by providing a low-power vibration sensor module.

[0006] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method: A low-power vibration sensor module, comprising: It is equipped with a power management unit, a vibration wake-up unit, a main control unit, and a multi-axis vibration sensor, which include a normally open power supply output terminal and a controlled main power supply output terminal. The controlled main power output terminal of the power management unit is connected to the main control unit and the multi-axis vibration sensor; The multi-axis vibration sensor generates a vibration electrical signal and connects it to the input terminal of the vibration wake-up unit and the main control unit; The normally open power output terminal of the power management unit is connected to the input terminal of the vibration wake-up unit, and the wake-up output signal of the vibration wake-up unit is connected to the power management unit.

[0007] Preferably, the vibration wake-up unit includes a comparison circuit unit, which includes a current detection module and a voltage comparison module; the vibration electrical signal input terminal is connected to the input terminal of the current detection module; the output terminal of the current detection module is connected to the input terminal of the voltage comparison module; and the output of the voltage comparison module is a wake-up signal.

[0008] Preferably, the current detection module is a current comparator, and the voltage comparison module is a voltage hysteresis comparator.

[0009] Preferably, the current comparator includes a first MOSFET M1, a second MOSFET M2, a third MOSFET M3, a fourth MOSFET M4, a fifth MOSFET M5, and a sixth MOSFET M6; The source of the first MOSFET M1, the source of the second MOSFET M2, the source of the sixth MOSFET M6, and the drain of the sixth MOSFET M6 are grounded. The gate of the second MOSFET M2, the gate of the sixth MOSFET M6, and the drain of the fifth MOSFET M5 are connected together and connected to the second voltage V2. The gate of the fifth MOSFET M5 is connected to the third voltage V3; The sources of the third MOSFET M3 and the fourth MOSFET M4 are connected to the power supply. The gate of the third MOSFET M3 and the gate of the fourth MOSFET M4 are connected together, as is the drain of the third MOSFET M3, and are connected to the drain of the first MOSFET M1. The drains of the second MOSFET M2 and the fourth MOSFET M4 are connected together to form a current comparison node, which is then connected to the positive input of the voltage hysteresis comparator U1.

[0010] Preferably, the negative input terminal of the voltage hysteresis comparator U1 is connected to the third voltage V3; the output terminal of the voltage comparator U1 is connected to the control terminal of the power management unit.

[0011] Preferably, the channel width-to-length ratio of the first MOSFET M1 is greater than that of the second MOSFET M2.

[0012] Preferably, the vibration wake-up unit also includes a wake-up source, and the wake-up methods of the wake-up source include external trigger wake-up, timed wake-up, and vibration signal threshold wake-up.

[0013] This utility model, by adopting the above technical solution, has significant technical effects: The sensor designed in this invention reduces the normally-on time of the main control unit and the multi-axis vibration sensor by using a vibration wake-up unit, thereby reducing average power consumption. Simultaneously, it improves the accuracy and adaptability of wake-up through multiple wake-up methods.

[0014] The wake-up unit of this utility model adopts a two-stage comparison structure for current detection and voltage comparison to realize the signal processing link and improve the signal-to-noise ratio; the current detection module amplifies the weak vibration electrical signal to improve sensitivity; the voltage comparison module sets a precise threshold to avoid false triggering; thereby reducing the overall power consumption of the system. The current detection module is always on, and the voltage comparison module only works when needed. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the system of this utility model.

[0016] Figure 2 This is a schematic diagram of the current comparator circuit of the vibration wake-up unit of this utility model.

[0017] Figure 3 This is a schematic diagram of the vibration wake-up unit circuit of this utility model. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0019] Example 1 A low-power vibration sensor module, comprising: It is equipped with a power management unit, a vibration wake-up unit, a main control unit, and a multi-axis vibration sensor, which include a normally open power supply output terminal and a controlled main power supply output terminal. The controlled main power output terminal of the power management unit is connected to the main control unit and the multi-axis vibration sensor; The multi-axis vibration sensor generates a vibration electrical signal and connects it to the input terminal of the vibration wake-up unit and the main control unit; The normally open power output terminal of the power management unit is connected to the input terminal of the vibration wake-up unit, and the wake-up output signal of the vibration wake-up unit is connected to the power management unit.

[0020] The vibration wake-up unit includes a comparison circuit unit, which includes a current detection module and a voltage comparison module. The vibration electrical signal input terminal is connected to the input terminal of the current detection module; the output terminal of the current detection module is connected to the input terminal of the voltage comparison module; and the output of the voltage comparison module is the wake-up signal.

[0021] The current detection module is a current comparator, and the voltage comparison module is a voltage hysteresis comparator.

[0022] Example 2 A low-power vibration sensor module, comprising: It is equipped with a power management unit, a vibration wake-up unit, a main control unit, and a multi-axis vibration sensor, which include a normally open power supply output terminal and a controlled main power supply output terminal. The controlled main power output terminal of the power management unit is connected to the main control unit and the multi-axis vibration sensor; The multi-axis vibration sensor generates a vibration electrical signal and connects it to the input terminal of the vibration wake-up unit and the main control unit; The normally open power output terminal of the power management unit is connected to the input terminal of the vibration wake-up unit, and the wake-up output signal of the vibration wake-up unit is connected to the power management unit.

[0023] The vibration wake-up unit includes a comparison circuit unit, which includes a current detection module and a voltage comparison module. The vibration electrical signal input terminal is connected to the input terminal of the current detection module; the output terminal of the current detection module is connected to the input terminal of the voltage comparison module; and the output of the voltage comparison module is the wake-up signal.

[0024] The current detection module is a current comparator, and the voltage comparison module is a voltage hysteresis comparator.

[0025] The current comparator includes a first MOSFET M1, a second MOSFET M2, a third MOSFET M3, a fourth MOSFET M4, a fifth MOSFET M5, and a sixth MOSFET M6; The source of the first MOSFET M1, the source of the second MOSFET M2, the source of the sixth MOSFET M6, and the drain of the sixth MOSFET M6 are grounded. The gate of the second MOSFET M2, the gate of the sixth MOSFET M6, and the drain of the fifth MOSFET M5 are connected together and connected to the second voltage V2. The gate of the fifth MOSFET M5 is connected to the third voltage V3; The sources of the third MOSFET M3 and the fourth MOSFET M4 are connected to the power supply. The gate of the third MOSFET M3 and the gate of the fourth MOSFET M4 are connected together, as is the drain of the third MOSFET M3, and are connected to the drain of the first MOSFET M1. The drains of the second MOSFET M2 and the fourth MOSFET M4 are connected together to form a current comparison node, which is then connected to the positive input of the voltage hysteresis comparator U1.

[0026] The negative input terminal of the voltage hysteresis comparator U1 is connected to the third voltage V3; the output terminal of the voltage comparator U1 is connected to the control terminal of the power management unit.

[0027] The channel width-to-length ratio of the first MOSFET M1 is greater than that of the second MOSFET M2.

[0028] Example 3 A low-power vibration sensor module, comprising: It is equipped with a power management unit, a vibration wake-up unit, a main control unit, and a multi-axis vibration sensor, which include a normally open power supply output terminal and a controlled main power supply output terminal. The controlled main power output terminal of the power management unit is connected to the main control unit and the multi-axis vibration sensor; The multi-axis vibration sensor generates a vibration electrical signal and connects it to the input terminal of the vibration wake-up unit and the main control unit; The normally open power output terminal of the power management unit is connected to the input terminal of the vibration wake-up unit, and the wake-up output signal of the vibration wake-up unit is connected to the power management unit.

[0029] The vibration wake-up unit includes a comparison circuit unit, which includes a current detection module and a voltage comparison module. The vibration electrical signal input terminal is connected to the input terminal of the current detection module; the output terminal of the current detection module is connected to the input terminal of the voltage comparison module; and the output of the voltage comparison module is the wake-up signal.

[0030] The current detection module is a current comparator, and the voltage comparison module is a voltage hysteresis comparator.

[0031] The current comparator includes a first MOSFET M1, a second MOSFET M2, a third MOSFET M3, a fourth MOSFET M4, a fifth MOSFET M5, and a sixth MOSFET M6; The source of the first MOSFET M1, the source of the second MOSFET M2, the source of the sixth MOSFET M6, and the drain of the sixth MOSFET M6 are grounded. The gate of the second MOSFET M2, the gate of the sixth MOSFET M6, and the drain of the fifth MOSFET M5 are connected together and connected to the second voltage V2. The gate of the fifth MOSFET M5 is connected to the third voltage V3; The sources of the third MOSFET M3 and the fourth MOSFET M4 are connected to the power supply. The gate of the third MOSFET M3 and the gate of the fourth MOSFET M4 are connected together, as is the drain of the third MOSFET M3, and are connected to the drain of the first MOSFET M1. The drains of the second MOSFET M2 and the fourth MOSFET M4 are connected together to form a current comparison node, which is then connected to the positive input of the voltage hysteresis comparator U1.

[0032] The negative input terminal of the voltage hysteresis comparator U1 is connected to the third voltage V3; the output terminal of the voltage comparator U1 is connected to the control terminal of the power management unit.

[0033] The channel width-to-length ratio of the first MOSFET M1 is greater than that of the second MOSFET M2.

[0034] The vibration wake-up unit is woken up by external triggering.

[0035] Example 4 A low-power vibration sensor module, comprising: It is equipped with a power management unit, a vibration wake-up unit, a main control unit, and a multi-axis vibration sensor, which include a normally open power supply output terminal and a controlled main power supply output terminal. The controlled main power output terminal of the power management unit is connected to the main control unit and the multi-axis vibration sensor; The multi-axis vibration sensor generates a vibration electrical signal and connects it to the input terminal of the vibration wake-up unit and the main control unit; The normally open power output terminal of the power management unit is connected to the input terminal of the vibration wake-up unit, and the wake-up output signal of the vibration wake-up unit is connected to the power management unit.

[0036] The vibration wake-up unit includes a comparison circuit unit, which includes a current detection module and a voltage comparison module. The vibration electrical signal input terminal is connected to the input terminal of the current detection module; the output terminal of the current detection module is connected to the input terminal of the voltage comparison module; and the output of the voltage comparison module is the wake-up signal.

[0037] The current detection module is a current comparator, and the voltage comparison module is a voltage hysteresis comparator.

[0038] The current comparator includes a first MOSFET M1, a second MOSFET M2, a third MOSFET M3, a fourth MOSFET M4, a fifth MOSFET M5, and a sixth MOSFET M6; The source of the first MOSFET M1, the source of the second MOSFET M2, the source of the sixth MOSFET M6, and the drain of the sixth MOSFET M6 are grounded. The gate of the second MOSFET M2, the gate of the sixth MOSFET M6, and the drain of the fifth MOSFET M5 are connected together and connected to the second voltage V2. The gate of the fifth MOSFET M5 is connected to the third voltage V3; The sources of the third MOSFET M3 and the fourth MOSFET M4 are connected to the power supply. The gate of the third MOSFET M3 and the gate of the fourth MOSFET M4 are connected together, as is the drain of the third MOSFET M3, and are connected to the drain of the first MOSFET M1. The drains of the second MOSFET M2 and the fourth MOSFET M4 are connected together to form a current comparison node, which is then connected to the positive input of the voltage hysteresis comparator U1.

[0039] The negative input terminal of the voltage hysteresis comparator U1 is connected to the third voltage V3; the output terminal of the voltage comparator U1 is connected to the control terminal of the power management unit.

[0040] The channel width-to-length ratio of the first MOSFET M1 is greater than that of the second MOSFET M2.

[0041] The vibration wake-up unit is woken up via a timed wake-up timer.

[0042] Example 5 A low-power vibration sensor module, comprising: It is equipped with a power management unit, a vibration wake-up unit, a main control unit, and a multi-axis vibration sensor, which include a normally open power supply output terminal and a controlled main power supply output terminal. The controlled main power output terminal of the power management unit is connected to the main control unit and the multi-axis vibration sensor; The multi-axis vibration sensor generates a vibration electrical signal and connects it to the input terminal of the vibration wake-up unit and the main control unit; The normally open power output terminal of the power management unit is connected to the input terminal of the vibration wake-up unit, and the wake-up output signal of the vibration wake-up unit is connected to the power management unit.

[0043] The vibration wake-up unit includes a comparison circuit unit, which includes a current detection module and a voltage comparison module. The vibration electrical signal input terminal is connected to the input terminal of the current detection module; the output terminal of the current detection module is connected to the input terminal of the voltage comparison module; and the output of the voltage comparison module is the wake-up signal.

[0044] The current detection module is a current comparator, and the voltage comparison module is a voltage hysteresis comparator.

[0045] The current comparator includes a first MOSFET M1, a second MOSFET M2, a third MOSFET M3, a fourth MOSFET M4, a fifth MOSFET M5, and a sixth MOSFET M6; The source of the first MOSFET M1, the source of the second MOSFET M2, the source of the sixth MOSFET M6, and the drain of the sixth MOSFET M6 are grounded. The gate of the second MOSFET M2, the gate of the sixth MOSFET M6, and the drain of the fifth MOSFET M5 are connected together and connected to the second voltage V2. The gate of the fifth MOSFET M5 is connected to the third voltage V3; The sources of the third MOSFET M3 and the fourth MOSFET M4 are connected to the power supply. The gate of the third MOSFET M3 and the gate of the fourth MOSFET M4 are connected together, as is the drain of the third MOSFET M3, and are connected to the drain of the first MOSFET M1. The drains of the second MOSFET M2 and the fourth MOSFET M4 are connected together to form a current comparison node, which is then connected to the positive input of the voltage hysteresis comparator U1.

[0046] The negative input terminal of the voltage hysteresis comparator U1 is connected to the third voltage V3; the output terminal of the voltage comparator U1 is connected to the control terminal of the power management unit.

[0047] The channel width-to-length ratio of the first MOSFET M1 is greater than that of the second MOSFET M2.

[0048] The vibration wake-up unit is woken up by vibration signal threshold.

Claims

1. A low-power vibration sensor module, characterized in that, include: It is equipped with a power management unit, a vibration wake-up unit, a main control unit, and a multi-axis vibration sensor, which include a normally open power supply output terminal and a controlled main power supply output terminal. The controlled main power output terminal of the power management unit is connected to the main control unit and the multi-axis vibration sensor; The multi-axis vibration sensor generates a vibration electrical signal and connects it to the input terminal of the vibration wake-up unit and the main control unit; The normally open power output terminal of the power management unit is connected to the input terminal of the vibration wake-up unit, and the wake-up output signal of the vibration wake-up unit is connected to the power management unit.

2. The low-power vibration sensor module according to claim 1, characterized in that, The vibration wake-up unit includes a comparison circuit unit, which includes a current detection module and a voltage comparison module. The vibration electrical signal input terminal is connected to the input terminal of the current detection module; the output terminal of the current detection module is connected to the input terminal of the voltage comparison module; and the output of the voltage comparison module is the wake-up signal.

3. The low-power vibration sensor module according to claim 2, characterized in that, The current detection module is a current comparator, and the voltage comparison module is a voltage hysteresis comparator.

4. The low-power vibration sensor module according to claim 3, characterized in that, The current comparator includes a first MOSFET M1, a second MOSFET M2, a third MOSFET M3, a fourth MOSFET M4, a fifth MOSFET M5, and a sixth MOSFET M6; The source of the first MOSFET M1, the source of the second MOSFET M2, the source of the sixth MOSFET M6, and the drain of the sixth MOSFET M6 are grounded. The gate of the second MOSFET M2, the gate of the sixth MOSFET M6, and the drain of the fifth MOSFET M5 are connected together and connected to the second voltage V2. The gate of the fifth MOSFET M5 is connected to the third voltage V3; The sources of the third MOSFET M3 and the fourth MOSFET M4 are connected to the power supply. The gate of the third MOSFET M3 and the gate of the fourth MOSFET M4 are connected together, as is the drain of the third MOSFET M3, and are connected to the drain of the first MOSFET M1. The drains of the second MOSFET M2 and the fourth MOSFET M4 are connected together to form a current comparison node, which is then connected to the positive input of the voltage hysteresis comparator U1.

5. The low-power vibration sensor module according to claim 3, characterized in that, The negative input terminal of the voltage hysteresis comparator U1 is connected to the third voltage V3; the output terminal of the voltage comparator U1 is connected to the control terminal of the power management unit.

6. The low-power vibration sensor module according to claim 4, characterized in that, The channel width-to-length ratio of the first MOSFET M1 is greater than that of the second MOSFET M2.

7. The low-power vibration sensor module according to claim 1, characterized in that, The vibration wake-up unit also includes a wake-up source, and the wake-up methods of the wake-up source include external trigger wake-up, timed wake-up, and vibration signal threshold wake-up.

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