Multi-mode wake-up compatible circuit and electronic device
By combining switching devices with multiple wake-up circuits in a self-capacitive ADCP device, and utilizing the internal power supply and RTC button battery to achieve multi-mode wake-up compatibility, the problem of limited application scenarios and energy consumption during device wake-up is solved, and low-power multi-mode wake-up compatibility is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NANJING HAIPU HYDROLOGICAL TECH CO LTD
- Filing Date
- 2022-09-19
- Publication Date
- 2026-06-23
AI Technical Summary
Existing self-capacitive ADCP devices require an additional power supply for the communication cable during the wake-up process, which limits their application scenarios, is not energy-efficient, and does not support compatibility with multiple communication methods.
A combination of switching devices and RTC wake-up circuits, RS422 wake-up circuits, and RS232 wake-up circuits is used to achieve multi-mode wake-up compatibility through optocouplers. The wake-up signal is provided by the internal power supply of the device and the RTC button battery, avoiding the need for additional power supply in the communication cable.
It achieves the goal of eliminating the need for additional communication cables and power supplies, supports multiple wake-up methods, and has almost zero power consumption in sleep mode, resulting in significant energy savings.
Smart Images
Figure CN115694130B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of circuit technology, and more specifically to a multi-mode wake-up compatible circuit and electronic device. Background Technology
[0002] ADCP, or Acoustic Doppler Current Profiler, is a device for measuring water flow velocity based on the acoustic Doppler principle (all devices mentioned below refer to ADCP devices). It primarily works by emitting sound waves into the water area being measured via a transducer; these sound waves are reflected within the water. The water flow velocity is calculated by measuring the reflected sound wave signals. Self-contained ADCPs are lightweight and easy to install on buoys, ship hulls, ship bottoms, or fixed to the seabed, connecting to a computer on shore via cable or modem. Self-contained ADCPs need to operate unattended underwater for extended periods, collecting and storing large amounts of data. Therefore, a secure and reliable storage medium and file management chip are required. Furthermore, most existing self-contained ADCPs are powered by integrated internal batteries; to ensure longer battery life, power consumption control is also necessary. This power consumption control typically involves the device entering sleep mode during standby and waking up before entering operating mode during runtime.
[0003] Most ADCPs on the market use a method of adding a power supply to the communication cable connected to the device to power the device's communication circuitry, enabling wake-up commands to be transmitted to the device via the communication circuitry. This method has two significant drawbacks: 1. Limited application scenarios: an additional power supply is required in the communication cable, which is inconvenient to provide in most applications, increasing the difficulty of using the device; 2. Inefficient energy saving: the added power supply in the communication cable must continuously power the communication circuitry in the device to achieve normal wake-up; 3. Incompatible with various communication methods: some communication methods have built-in power cables, while others do not. Therefore, waking up devices by adding an additional power supply is not ideal. Summary of the Invention
[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a multi-mode wake-up compatible circuit and electronic device.
[0005] To achieve the above objectives, in a first aspect, the present invention provides a multi-mode wake-up compatible circuit, comprising a switching device, wherein the positive terminal of the control side of the switching device is connected to the positive terminal of the device control power supply, and the negative terminal of its control side is connected to an RTC wake-up circuit; one end of the output side of the switching device is connected to the positive terminals of a resistor R1 and a diode D1 respectively, and the other end of its output side is grounded; the other end of the resistor R1 is connected to the positive terminal of the wake-up control power supply; the negative terminal of the diode D1 is connected to the negative terminal of the diode D2 and the wake-up output line respectively; and the positive terminal of the diode D2 is connected to an external wake-up compatible circuit.
[0006] Furthermore, the external wake-up compatible circuit includes an RS422 wake-up compatible circuit, which includes a resistor R2 connected to the positive terminal of diode D2 and a transistor Q1. The resistor R2 is connected to the positive terminal of the wake-up control power supply. The emitter of the transistor Q1 is connected to the positive terminal of diode D2, and its base is connected to one end of resistor R4. The other end of resistor R4 is connected to the RS422 wake-up circuit, and the collector of the transistor Q1 is grounded.
[0007] Furthermore, the external wake-up compatible circuit also includes an RS232 wake-up compatible circuit, which includes a transistor Q2 whose collector is connected to the positive terminal of diode D2. The base of transistor Q2 is connected to one end of resistors R5 and R6. The emitter of transistor Q2 and the other end of resistor R5 are both grounded. The other end of resistor R6 is connected to the RS232 wake-up circuit.
[0008] Furthermore, the switching device is an optocoupler.
[0009] Furthermore, a resistor R3 is connected between the positive terminal of the control side of the optocoupler and the positive terminal of the device control power supply.
[0010] Furthermore, the emitter of the transistor Q1 is connected to the negative terminal of the Zener diode D3, and its collector is connected to the positive terminal of the Zener diode D3.
[0011] In a second aspect, the present invention provides an electronic device including the aforementioned multi-mode wake-up compatible circuit.
[0012] Beneficial effects: 1. This invention eliminates the need for an additional power supply to the communication cable connected to the device;
[0013] 2. It is compatible with multiple wake-up methods, including RS422 wake-up circuit, RS232 wake-up circuit and internal clock wake-up circuit;
[0014] 3. When the device is in sleep mode, there is no conductive loop in the circuit, so the power consumption of the entire device is almost zero, which has the advantage of energy saving. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of a multi-mode wake-up compatible circuit according to an embodiment of the present invention. Detailed Implementation
[0016] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. These embodiments are implemented based on the technical solutions of the present invention, and it should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.
[0017] like Figure 1 As shown, this embodiment of the invention provides a multi-mode wake-up compatible circuit, including a switching device. The positive terminal of the control side of the switching device is connected to the positive terminal of the device control power supply (BAT+3V), and its negative terminal is used to connect to the RTC wake-up circuit to receive the device's RTC clock and generate an internal RTC wake-up signal. One end of the output side of the switching device is connected to the positive terminals of resistor R1 and diode D1, respectively, and the other end of the output side of the switching device is grounded. The other end of resistor R1 is connected to the positive terminal of the wake-up control power supply (3V3V). The negative terminals of diode D1 and D2 are connected to the wake-up output line Wake_Up, respectively, and the positive terminal of diode D2 is connected to the external wake-up compatible circuit. The wake-up control power supply is preferably provided by the ADCP's monitoring circuit, and the device control power supply is preferably provided by an RTC coin cell battery.
[0018] The external wake-up compatible circuit of this invention includes an RS422 wake-up compatible circuit. The RS422 wake-up compatible circuit includes a resistor R2 connected to the anode of diode D2 and a transistor Q1. Resistor R2 is connected to the positive terminal of the wake-up control power supply (3V3). The emitter of transistor Q1 is connected to the anode of diode D2. The base of transistor Q1 is connected to one end of resistor R4. The other end of resistor R4 is used to connect to the RS422 wake-up circuit to receive an external RS422 wake-up signal. The collector of transistor Q1 is grounded. Preferably, the emitter of transistor Q1 is also connected to the cathode of Zener diode D3, and the collector of transistor Q1 is connected to the anode of Zener diode D3.
[0019] The external wake-up compatible circuit of this embodiment of the invention also includes an RS232 wake-up compatible circuit. The RS232 wake-up compatible circuit includes a transistor Q2 whose collector is connected to the positive terminal of diode D2. The base of transistor Q2 is connected to one end of resistor R5 and resistor R6. The emitter of transistor Q2 and the other end of resistor R5 are both grounded. The other end of resistor R6 is connected to the RS232 wake-up circuit to receive external RS232 wake-up signals.
[0020] The aforementioned switching device can be a relay or other similar device, but an optocoupler is more preferred. A resistor R3 is connected between the positive terminal of the control side of the optocoupler and the positive terminal of the device's control power supply.
[0021] Working Principle: When the device is in working mode, the device system circuit can output a sleep signal to the system power monitoring circuit. At this time, the system power monitoring circuit controls the device power to shut down, causing the device to enter sleep mode from working mode. In sleep mode, when there is no wake-up signal input, the wake-up output line Wake_Up outputs a high level to the system monitoring circuit, keeping the device in sleep mode. When a wake-up signal is input, the wake-up output line Wake_Up outputs a low level to the system monitoring circuit, and this low level remains effective for 400ms, then wakes the device. Specifically, the RTC wake-up circuit outputs a high-level signal in the non-wake-up state. When the device is woken up using the RTC wake-up signal, the RTC wake-up signal provided by the RTC wake-up circuit is a low-level signal. When the negative terminal of the optocoupler is connected to the low-level signal, its V0 and VE pins conduct, and the leakage current of diode D1 pulls the wake-up output line Wake_Up low. The RS422 wake-up circuit provides a high-level output signal in the non-wake-up state. When the device is woken up using the RS422 wake-up signal, the RS422 wake-up signal provided by the RS422 wake-up circuit is a low-level signal. At this time, transistor Q1 is turned on, and the leakage current of diode D2 pulls the wake-up output line Wake_Up low. The RS232 wake-up circuit outputs a low-level signal in the non-wake-up state. When the device is woken up using the RS232 wake-up signal, the RS232 wake-up signal provided by the RS232 wake-up circuit is a high-level signal. At this time, transistor Q2 is turned on, and the leakage current of diode D2 pulls the wake-up output line Wake_Up low.
[0022] Based on the above embodiments, those skilled in the art can easily understand that the present invention also provides an electronic device, which includes the above-mentioned multi-mode wake-up compatible circuit, and the electronic device includes, but is not limited to, an acoustic Doppler current profiler.
[0023] The above description is merely a preferred embodiment of the present invention. It should be noted that for those skilled in the art, other parts not specifically described are existing technology or common knowledge. Several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.
Claims
1. A multi-mode wake-up compatible circuit, characterized in that, The device includes a switching device, wherein the positive terminal of the control side of the switching device is connected to the positive terminal of the device control power supply, and the negative terminal of the control side is connected to the RTC wake-up circuit. One end of the output side of the switching device is connected to the positive terminals of resistor R1 and diode D1 respectively, and the other end of the output side is grounded. The other end of resistor R1 is connected to the positive terminal of the wake-up control power supply. The negative terminals of diode D1 and D2 are connected to the wake-up output line respectively. The positive terminal of diode D2 is connected to an external wake-up compatible circuit. The external wake-up compatible circuit includes an RS422 wake-up compatible circuit, which includes a resistor R2 connected to the positive terminal of diode D2 and a transistor Q1. The resistor R2 is connected to the positive terminal of the wake-up control power supply. The emitter of the transistor Q1 is connected to the positive terminal of diode D2, and its base is connected to one end of resistor R4. The other end of resistor R4 is connected to the RS422 wake-up circuit. The collector of the transistor Q1 is grounded. The external wake-up compatible circuit also includes an RS232 wake-up compatible circuit, which includes a transistor Q2 whose collector is connected to the positive terminal of diode D2. The base of transistor Q2 is connected to one end of resistors R5 and R6. The emitter of transistor Q2 and the other end of resistor R5 are both grounded. The other end of resistor R6 is connected to the RS232 wake-up circuit. The switching device is an optocoupler.
2. The multi-mode wake-up compatible circuit according to claim 1, characterized in that, A resistor R3 is connected between the positive terminal of the control side of the optocoupler and the positive terminal of the device control power supply.
3. The multi-mode wake-up compatible circuit according to claim 1, characterized in that, The emitter of transistor Q1 is also connected to the negative terminal of Zener diode D3, and its collector is connected to the positive terminal of Zener diode D3.
4. An electronic device, characterized in that, Includes the multi-mode wake-up compatible circuit as described in any one of claims 1 to 3.