CN205139831U - Power management system of wearable smart machine - Google Patents

Abstract

The utility model is suitable for the field of power management of wearable smart devices, and provides a power management system of wearable smart devices, including a switch and a delay reset control unit, a power supply unit, a key unit, a key edge detection unit, an interface unit and its The connection relationship between them; the button unit receives the user's button operation and transmits it to the button edge detection unit; the button edge detection unit detects the input level change generated by the button operation and generates a level change signal and transmits it to the switch and delay reset control unit; The switch and delay reset control unit transmits the level change signal to the external operating system; it also controls the conduction or disconnection with the power supply unit when receiving the operation command transmitted from the interface unit. Through the method and system provided by the utility model, the user can flexibly select the shutdown mode according to actual needs when setting up the wearable smart device, realizing the unification of the switch button and the cold reset button, and enhancing user interaction.

Description

A power management system for wearable smart devices

technical field

The utility model belongs to the field of power management, in particular to a power management system of a wearable intelligent device.

Background technique

Wearable smart devices are a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. At present, it is developing rapidly, and there are many brand products such as smart watches and smart bracelets on the market. Wearable smart devices generally use a built-in battery for power supply. The built-in battery has a small capacity due to size limitations. For example, the battery capacity of a smart watch is generally 300mA. The built-in battery is non-removable. The leakage current of wearable smart devices is generally above 0.1mA. When the leakage current exceeds 2mA for one day, this will cause the battery to be over-discharged when the product is in storage and affect the battery life. At the same time, the user requires a long battery life, and the leakage current is required to be small in the shutdown state.

At present, many solutions have been provided for the power management of wearable smart devices, but the battery capacity of wearable products is small. If the leakage current is large, the battery will be over-discharged in storage mode, and the power will be exhausted quickly, which will affect the battery. At the same time, when the system software crashes, it is necessary to pull out the battery or add a special reset switch to restart the system, and in the prior art, there is no distinction between the storage mode and the shutdown mode, and the user cannot perform power management according to actual needs when making a selection, and the interaction is poor. . Some have added a switch circuit with reset to reduce the current during storage, but it is level control, and long presses will cause the system to reset repeatedly, and the user experience is not good.

Utility model content

The technical problem to be solved by the utility model is to provide a power management system for wearable smart devices, which aims to solve the problem that users in the prior art cannot manage power according to actual needs and have poor interaction.

The utility model is achieved in this way, a power management system for wearable smart devices, including: a switch and delay reset control unit, a power supply unit, a button unit, a button edge detection unit and an interface unit; the power supply unit, the The key edge detection unit and the interface unit are respectively connected to the switch and the delay reset control unit; the key unit is connected to the key edge detection unit;

The button unit is used to receive the user's button operation and transmit it to the button edge detection unit;

The button edge detection unit is used to detect the input level change generated by the button operation, and generate a level change signal and transmit it to the switch and delay reset control unit;

The switch and delay reset control unit is used to transmit the received level change signal to the external operating system through the interface unit; it is also used to receive the operation command transmitted from the interface unit, and then according to the The operation command controls the connection or disconnection with the power supply unit.

Further, the power management system further includes a clock unit connected to the switch and the delay reset control unit and the interface unit respectively;

The clock unit is used to receive the timing instruction transmitted by the user through the interface unit and to set the timing; it is also used to generate a conduction value when the power supply unit is disconnected and the conduction value set by the timing is reached. The command is transmitted to the switch and delay reset control unit to control the conduction of the power supply unit; it is also used to generate a break when the power supply unit is turned on and reaches the cut-off value set by the timing The opening command is transmitted to the switch and delay reset control unit to control the disconnection of the power supply unit.

Further, the key unit includes power on and off and cold reset keys.

Further, the key edge detection unit includes a monostable flip-flop and a two-input OR gate;

The output end of the monostable trigger is connected to the first input end of the two-input OR gate;

The output end of the button unit is respectively connected to the input end of the monostable trigger and the second input end of the two-input OR gate;

The output end of the two-input OR gate is connected to the switch and delay reset control unit.

Further, the monostable pulse width of the monostable trigger is greater than 8 seconds.

Compared with the prior art, the utility model has the beneficial effect that: the system provided by the utility model can receive the settings of the user when using the wearable smart device, and can flexibly select the shutdown mode according to the actual needs, realizing the switch button It is unified with the cold reset button, which enhances user interaction. It avoids the over-discharge of the battery in the storage state, protects the battery, and prolongs the battery life. At the same time, it adds a key edge detection circuit to avoid long key presses that cause the system to reset repeatedly.

Description of drawings

Fig. 1 is a schematic structural diagram of a power management system of a wearable smart device provided by an embodiment of the present invention.

Fig. 2 is a schematic diagram of a detailed software flow of a power management system of a wearable smart device provided by an embodiment of the present invention.

Fig. 3 is a structural schematic diagram of a monostable flip-flop and an OR gate of the key edge detection unit provided by the embodiment of the present invention.

Fig. 4 is a structural block diagram of a MOSFET switch with low on-resistance and a delay reset control circuit provided by the embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a button edge detection unit, a low conduction resistance MOSFET switch and a delay reset control circuit IC in a wearable smart device provided by an embodiment of the present invention.

Fig. 6 is a schematic diagram of a power state machine of a wearable smart device provided by an embodiment of the present invention.

Fig. 7 is a schematic diagram of switching from the storage mode to the working mode of the wearable smart device provided by the embodiment of the present invention.

Fig. 8 is a schematic diagram of switching from the storage mode to the working mode of the wearable smart device provided by the embodiment of the present invention.

Fig. 9 is a schematic diagram of switching from the working mode to the storage mode of the wearable smart device provided by the embodiment of the present invention.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figure 1, a power management system for a wearable smart device provided by an embodiment of the utility model includes: a switch and delay reset control unit 1, a power supply unit 2, a button unit 3, a button edge detection unit 4 and The interface unit 5; the power supply unit 2, the key edge detection unit 4 and the interface unit 5 are respectively connected with the switch and the delay reset control unit 1; the key unit 3 is connected with the key edge detection unit 4;

The button unit 3 is used to receive the user's button operation and transmit it to the button edge detection unit 4;

The key edge detection unit 4 is used to detect the input level change generated by the key operation, and generate a level change signal and transmit it to the switch and delay reset control unit 1;

The switch and delay reset control unit 1 is used to transmit the received level change signal to the external operating system through the interface unit 5; it is also used to receive the operation command transmitted from the interface unit 5, and then control according to the operation command Conduction or disconnection with the power supply unit 2. In practical applications, the interface unit 5 is connected to the wearable smart device, and can transmit the level change signal to the operating system of the wearable smart device, and can also receive the user's operation on the wearable smart device.

In an example application, according to actual needs, the power management system may further include a clock unit 6 connected to the switch and delay reset control unit 1 and the interface unit 5, respectively;

The clock unit 6 is used to receive the timing instruction transmitted by the user through the interface unit 5 and to set the timing; it is also used to generate a conduction instruction and transmit it to the The switch and delay reset control unit 1 is used to control the conduction of the power supply unit 2; it is also used to generate a disconnection command and transmit it to the switch and the The delayed reset control unit 1 is used to control the disconnection of the power supply unit 2 . In practical applications, the switch and delay reset control unit 1, the clock unit 5 and the interface unit 4 can be integrated in one circuit. In the embodiment of the utility model, the switch and delay reset control unit 1, the clock unit 5 and the The interface unit 4 is a MOSFET switch with low conduction resistance and a delay reset control circuit. The button unit 3 includes a power on/off button and a cold reset button.

In this embodiment, the power supply unit 2 is a built-in battery of the wearable smart device, and the low conduction impedance MOSFET switch and the delay reset control circuit are connected to the mobile smart processor SOC of the wearable smart device through its own interface, which can The wearable smart device adopts the structure of the utility model, and can realize the power management method as shown in FIG. 2 .

The working principle of the present utility model is described in detail below: the utility model adopts a monostable trigger for edge detection, an OR gate and a built-in MOSFET (Metal-Oxide-SemiconductorField-EffectTransistor, Metal-Oxide Semiconductor Field-Effect Transistor) The delay reset circuit combination of the switch is used in wearable smart devices to realize the power management system provided by the utility model. The utility model selects a monostable trigger for edge detection, an OR gate and a MOSFET with low conduction resistance Switch and delay reset control circuit IC, and at the same time add a menu to the wearable smart device for the switching interface of storage mode and shutdown mode to realize the power management provided by the utility model. The specific technical solution is:

a. Monostable trigger for edge detection, standby current less than 10uA, transmission delay less than 6ns,

Select the appropriate resistor and capacitor parameters so that the delay time is 8s;

b. The OR gate in the button edge detection unit 4, the standby current is less than 1uA, and the transmission delay is less than 3ns

The connection relationship of the button edge detection unit 4 is shown in Fig. 3, wherein, the output terminal Q1 of the monostable flip-flop is connected to the first input terminal A of the two-input OR gate; the output terminal of the button unit is connected to the single The input terminal /TR of the steady-state trigger and the second input terminal B of the two-input OR gate; the output terminal Y of the two-input OR gate is connected to the /SR pin of the switch and delay reset control unit.

d. Low on-resistance MOSFET switch and delay reset control circuit IC, the typical value of its on-resistance at 3.6V is about 23mΩ, which can generate delay reset output of 1.9s and 7.7s. At the same time, there are MOSFET switch off and on control interfaces, and an oscillator for clock counting, the functional block diagram is shown in Figure 4;

e. As shown in Figure 5, it is a block diagram of the internal application of a MOSFET switch with a low on-resistance and a delay reset control circuit IC in a wearable smart device, where the thick arrow is the power signal, and the thin arrow is the control reset signal.

f. Three modes of power supply for wearable smart devices: storage mode, shutdown mode, and working mode. Storage mode is that the monostable trigger of the button edge detection unit 4, the OR gate and the MOSFET switch with low on-resistance and the delay reset control circuit are connected to the battery for power supply, and other parts of the wearable smart device are disconnected from the battery. The shutdown mode is that the power management unit of the wearable smart device, the monostable trigger of the button edge detection unit 4, the OR gate, the MOSFET switch with low on-resistance and the delay reset control circuit are all powered by the battery. The wearable smart device only has The real-time clock of the power management unit works, and other parts do not work. The working state is the normal power supply, and the system is in normal working state.

g. Switching between 3 modes of power supply for wearable smart devices. The processor SOC in the wearable smart device controls the MOSFET switch with low on-resistance and the OFF signal or /SR0 signal of the delay reset control circuit through the GPIO interface, and the input signal of the monostable trigger for edge detection, as shown in Figure 5 Display, make the wearable smart device enter the storage mode or shutdown mode, input through /SR0 or SYS_WKEUP, according to different /SR0 input time conditions, make the wearable smart device switch from storage mode to shutdown mode or normal mode, and switch its working mode As shown in Figure 6.

h. When the button has a low level input, the Q pin of the monostable flip-flop used for edge detection appears low level, the delay is 8s, and then becomes high level, and the Q pin is used as the A pin of the OR gate The input of the OR gate, the input of the B pin of the OR gate is the button signal, and the output Y pin of the OR gate is connected with the MOSFET switch with low conduction resistance and the power output control signal /SR of the delay reset control circuit.

m. The timing diagram of the MOSFET switch with low conduction resistance and the power output control signal /SR of the delay reset control circuit is shown in Figure 7. When the /SR signal is low, after the delay of Tvon, the MOSFET switch with low conduction resistance The output VOUT of the delay reset control circuit is a normal output to realize the switch from the storage mode to the working mode. At this time, the system is in a normal state, and the Q pin of the monostable flip-flop used for edge detection is output after 8s delay. High level, then the input A of the OR gate is high level, then the output Y of the OR gate is also high level, and the input /SR also becomes high level, which prevents the system from being repeatedly reset by pressing the button for a long time.

n. The timing diagram of the MOSFET switch with low on-resistance and the power output of the delay reset control circuit and the control signal SYS_WAKE is shown in Figure 8. When the SYS_WAKE signal is high, after the delay of Ton, the MOSFET switch with low on-resistance and The output VOUT of the delay reset control circuit is a normal output, which realizes the switching from the storage mode to the working mode.

l. The timing diagram of power supply output and control signal OFF of MOSFET switch with low conduction resistance and delay reset control circuit is shown in Figure 9. When the OFF signal is a rising edge, after Toff delay, the MOSFET switch with low conduction resistance and The output VOUT of the delay reset control circuit is low to realize switching from the working mode to the storage mode.

Specifically, the low on-resistance MOSFET switch and the delay reset control circuit IC have built-in analog switches, delay circuits and control unit circuits; the low on-resistance MOSFET switch is connected to the VBAT input of the delay reset control circuit IC and the battery, VOUT is connected to the input power of the power management unit of the wearable smart device as the system power input; the /TR pin of the monostable flip-flop used for edge detection is connected to the switch key as the same input for switch and cold reset. The Q pin of the monostable flip-flop used for edge detection is connected to the input A pin of the OR gate, the input B pin of the OR gate is connected to the switch key, and the output Y pin of the OR gate is connected to the MOSFET with low conduction resistance The switch is connected to the /SR signal of the delay reset control circuit IC to realize the switching of the wearable smart device from normal mode to shutdown mode; the MOSFET switch with low on-resistance is connected to the OFF signal of the delay reset control circuit IC and the GPIO of the system processor Connected, as the control input of the storage mode; the output pin Q of the monostable flip-flop used for edge detection will maintain a low level for 8s, and then change to a high level, so that the output pin Y of the OR gate is high Level, so as to avoid /SR being low for a long time, so that the system is repeatedly reset; the MOSFET switch with low on-resistance is connected to the SYS_WAKE of the delay reset control circuit IC and the charging VBUS, so that the wearable smart device can be switched from storage mode to storage mode. Switching of the working mode; the user has a power system management menu on the interface, there are shutdown mode and storage mode to choose, and the shutdown mode is selected, and the system shuts down normally. Select the storage mode, the GPIO connected to the MOSFET switch OFF signal of the processor has a rising edge from low level to high level, the MOSFET switch is turned off, VOUT has no output, and the system enters the storage mode; the power supply of the wearable smart device is in the default state , in shutdown mode or normal mode, storage mode can only be entered through manual settings.

The wearable intelligent device provided by the utility model is characterized in that:

1. Divide the power supply mode of wearable smart devices into three modes: storage mode, shutdown mode, and work mode;

2. In the storage mode, only the monostable trigger/or gate for edge detection and the delay reset circuit of the MOSFET switch are always connected to the battery for power supply. The minimum leakage current of the wearable smart device is 10uA, and the leakage current is reduced by 10 times above

3. In shutdown mode, the power management unit of the wearable smart device and the delay reset circuit of the MOSFET switch and the monostable trigger/or gate for edge detection are connected to the battery for power supply, and are only used to maintain the wearable smart device The real-time clock and control circuit work, and the minimum leakage current of wearable smart devices is 100uA

4. When the software of the wearable smart device crashes, there is no need to pull out the battery, the power of the wearable smart device can be turned on and off, the wearable smart device can be restarted, and the switch button and the cold reset button are the same

5. The software user interface of wearable smart devices can be configured with storage mode and shutdown mode, so that users can flexibly configure the status of wearable smart devices according to actual conditions, and realize functions such as power saving and clock and alarm clock

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (5)

1. a power-supply management system for wearable smart machine, is characterized in that, described power-supply management system comprises: switch and time-delay reset control module, power supply unit, push-button unit, button edge detecting unit and interface unit; Described power supply unit, described button edge detecting unit are connected with time-delay reset control module with described switch respectively with described interface unit; Described push-button unit is connected with described button edge detecting unit;

Described push-button unit, for receiving the button operation of user and transferring to described button edge detecting unit;

Described button edge detecting unit, for detecting the incoming level change that described button operation produces, and generates level variable signal and transfers to described switch and time-delay reset control module;

Described switch and time-delay reset control module, for transferring to peripheral operation system by the described level variable signal received by described interface unit; Also for receiving the operational order transmitted from described interface unit, then control being turned on or off between described power supply unit according to described operational order.

2. power-supply management system as claimed in claim 1, it is characterized in that, described power-supply management system also comprises the clock unit be connected with interface unit with time-delay reset control module with described switch respectively;

Described clock unit, for receiving riming instructions that user transmitted by described interface unit and carrying out timing setting; Also for when described power supply unit disconnects, when arriving the conduction value of timing setting, generate a turn-on command and transfer to described switch and time-delay reset control module, in order to control the conducting of described power supply unit; Also for when described power supply unit conducting, when arriving the cut off value that timing arranges, generate an open command and transfer to described switch and time-delay reset control module, in order to control the disconnection of described power supply unit.

3. power-supply management system as claimed in claim 1, it is characterized in that, described push-button unit comprises switching on and shutting down and cold reset button.

4. power-supply management system as claimed in claim 1, is characterized in that, described button edge detecting unit comprises a monostalbe trigger and one or two input or doors;

The output terminal of described monostalbe trigger connects the first input end of described two inputs or door;

The output terminal of described push-button unit connects the input end of described monostalbe trigger and the second input end of described two inputs or door respectively;

The output terminal of described two inputs or door is connected to described switch and time-delay reset control module.

5. power-supply management system as claimed in claim 4, it is characterized in that, the monostable pulse width of described monostalbe trigger is greater than 8 seconds.