CN220490918U

CN220490918U - Surge-resistant signal acquisition circuit and electronic equipment

Info

Publication number: CN220490918U
Application number: CN202322048165.3U
Authority: CN
Inventors: 石凯; 袁厚旺
Original assignee: Beijing Xiaomi Mobile Software Co Ltd; Xiaomi Technology Wuhan Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd; Xiaomi Technology Wuhan Co Ltd
Priority date: 2023-07-31
Filing date: 2023-07-31
Publication date: 2024-02-13
Anticipated expiration: 2033-07-31

Abstract

The present disclosure relates to an anti-surge signal acquisition circuit and an electronic device. The circuit comprises: the electronic equipment comprises a power supply, a first voltage stabilizer, a first operational amplifier, a second voltage stabilizer and a second operational amplifier, wherein the first operational amplifier and the second operational amplifier respectively output collected first working voltage and second working voltage of the electronic equipment and send the collected first working voltage and the collected second working voltage to a processor of the electronic equipment, and the processor controls the electronic equipment to normally operate under the condition that the first working voltage is equal to the second working voltage. The anti-surge signal acquisition circuit is used for simultaneously sampling the working voltage of the electronic equipment through the two paths of operational amplifier voltage sampling circuits, and the two paths of operational amplifier voltage sampling circuits are powered by a common power supply, so that the two paths of acquired working voltages containing the surge voltage fluctuate in the same frequency and in the same amplitude, the situation that a processor of the electronic equipment starts shutdown protection because of surge testing can be avoided, and the problem that the surge testing fails can be solved.

Description

Surge-resistant signal acquisition circuit and electronic equipment

Technical Field

The disclosure relates to the technical field of circuits, in particular to an anti-surge signal acquisition circuit and electronic equipment.

Background

In the current frequency conversion hardware scheme of an external machine in the air conditioner industry, a compressor and a Power Factor Correction (PFC) circuit are often used for increasing over-current and over-voltage protection of the circuit through an operational amplifier scheme, the operational amplifier is used for collecting voltage signals through a working voltage sampling resistor of the compressor or the PFC circuit, the signals amplified by the operational amplifier are transmitted to an MCU, the MCU is used for comparing the signals with a reference value, and if the signals are larger than the reference value, the MCU triggers hardware protection and turns off equipment, so that the protection function is achieved.

However, when the electronic equipment faces the surge test, the problem that the voltage signal level acquired by the operational amplifier is instantly out of standard is easily generated, so that the equipment is stopped for protection, and the surge test is not passed.

Disclosure of Invention

To overcome the problems in the related art, according to a first aspect of the embodiments of the present disclosure, there is provided an anti-surge signal acquisition circuit applied to an electronic device, the circuit including: a power supply, a first voltage regulator, a first operational amplifier, a second voltage regulator, and a second operational amplifier;

the power supply is respectively connected with the first voltage stabilizer and the second voltage stabilizer and is used for supplying power to the first voltage stabilizer and the second voltage stabilizer;

the first voltage stabilizer is connected with the first operational amplifier and is used for supplying power to the first operational amplifier after the voltage of the power supply is reduced;

the second voltage stabilizer is connected with the second operational amplifier and is used for supplying power to the second operational amplifier after the voltage of the power supply is reduced;

the first operational amplifier is connected with a processor of the electronic equipment and is used for sending a first working voltage to the processor;

the second operational amplifier is connected with the processor of the electronic equipment and is used for sending a second working voltage to the processor;

the processor is used for controlling the electronic equipment to normally operate under the condition that the first working voltage is equal to the second working voltage.

Optionally, the first voltage stabilizer or the second voltage stabilizer is connected to a power supply end of the processor, and is used for supplying power to the processor after the voltage of the power supply is reduced.

Optionally, the signal input end of the first operational amplifier is connected with a working voltage sampling resistor of the electronic device and is used for collecting a first working voltage of the electronic device, and the output end of the first operational amplifier is connected with the first signal input end of the processor;

the signal input end of the second voltage stabilizer is connected with the working voltage sampling resistor and is used for collecting second working voltage of the electronic equipment, and the output end of the second operational amplifier is used for being connected with the second signal input end of the processor.

Optionally, the sampling resistor is an operating voltage sampling resistor of an air conditioner compressor or an operating voltage sampling resistor of an air conditioner power factor correction circuit.

Optionally, the processor is an MCU, configured to control the electronic device to stop when the first working voltage is not equal to the second working voltage.

Optionally, the power supply is a switching power supply or a linear power supply, and the output voltage includes 12V.

Optionally, the voltage stabilizer is DCDC, and the output voltage includes 5V.

Optionally, the first operating voltage and the second operating voltage comprise surge voltages.

According to a second aspect of embodiments of the present disclosure, there is provided an electronic device comprising the circuit of any one of the first aspects.

Optionally, the electronic device comprises an air conditioner.

In summary, an embodiment of the present disclosure provides an anti-surge signal acquisition circuit, which is applied to an electronic device, and the circuit includes: a power supply, a first voltage regulator, a first operational amplifier, a second voltage regulator, and a second operational amplifier; the power supply is respectively connected with the first voltage stabilizer and the second voltage stabilizer and is used for supplying power to the first voltage stabilizer and the second voltage stabilizer; the first voltage stabilizer is connected with the first operational amplifier and is used for supplying power to the first operational amplifier after the voltage of the power supply is reduced; the second voltage stabilizer is connected with the second operational amplifier and is used for supplying power to the second operational amplifier after the voltage of the power supply is reduced; the first operational amplifier is connected with a processor of the electronic equipment and is used for sending a first working voltage to the processor; the second operational amplifier is connected with the processor of the electronic equipment and is used for sending a second working voltage to the processor; the processor is used for controlling the electronic equipment to normally operate under the condition that the first working voltage is equal to the second working voltage. Because the same power supply is adopted for supplying power, the sampling signal voltages of the two paths of operational amplifiers are affected by the surge to show the same amplitude fluctuation, and the MCU is not caused to trigger shutdown protection, so that the surge test can be successfully passed.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram illustrating an anti-surge signal acquisition circuit according to an exemplary embodiment.

Fig. 2 is a schematic diagram illustrating an anti-surge signal acquisition circuit according to an example embodiment.

Fig. 3 is a schematic diagram illustrating an anti-surge signal acquisition circuit according to an example embodiment.

Fig. 4 is a block diagram of an electronic device, according to an example embodiment.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.

It should be noted that, all actions for acquiring signals, information or data in the present application are performed under the condition of conforming to the corresponding data protection rule policy of the country of the location and obtaining the authorization given by the owner of the corresponding device.

The term "including" and variations thereof as used herein are intended to be open-ended, i.e., including, but not limited to. The term "based on" is based at least in part on. The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments. Related definitions of other terms will be given in the description below.

It should be noted that the terms "first," "second," and the like in this disclosure are merely used to distinguish between different devices, modules, or units and are not used to define an order or interdependence of functions performed by the devices, modules, or units.

It should be noted that references to "one", "a plurality" and "a plurality" in this disclosure are intended to be illustrative rather than limiting, and those of ordinary skill in the art will appreciate that "one or more" is intended to be understood as "one or more" unless the context clearly indicates otherwise. The present disclosure is described below in connection with specific embodiments.

First, an application scenario of the present disclosure will be described. In the current frequency conversion hardware scheme of the outdoor unit in the air conditioning industry, a compressor and a PFC (power factor correction) circuit are often added to carry out overcurrent protection on the circuit through an operational amplifier scheme, the operational amplifier carries out voltage signal acquisition through a sampling resistor of the compressor or the PFC, signals amplified by the operational amplifier are transmitted to an MCU, and the MCU is compared with a reference value, if the signals are larger than the reference value, the MCU triggers hardware protection and turns off equipment, so that the protection effect is achieved.

However, when the surge test is carried out on the equipment, the voltage signal level acquired by the operational amplifier is easy to be out of standard in the moment, so that the equipment is stopped for protection, and the surge test is not passed. Based on the above, the embodiment of the disclosure provides an anti-surge signal acquisition circuit and device, which can solve the problem that surge test does not pass.

Fig. 1 is a schematic diagram illustrating an anti-surge signal acquisition circuit according to an exemplary embodiment. As shown in fig. 1, an embodiment of the present disclosure provides an anti-surge signal acquisition circuit 100, applied to an electronic device 400, the circuit 100 including: a power supply 10, a first voltage regulator 20, a first operational amplifier 30, a second voltage regulator 40, and a second operational amplifier 50; the power supply 10 is respectively connected with the first voltage stabilizer 20 and the second voltage stabilizer 40 and is used for supplying power to the first voltage stabilizer 20 and the second voltage stabilizer 40; the first voltage stabilizer 20 is connected to the first operational amplifier 30, and is configured to step down the voltage of the power supply 10 and then supply power to the first operational amplifier 30; the second voltage stabilizer 40 is connected to the second operational amplifier 50, and is configured to step down the voltage of the power supply 10 and then supply power to the second operational amplifier 50; the first operational amplifier 30 is connected to the processor 60 of the electronic device 400 and is configured to send a first operating voltage to the processor 60; the second operational amplifier 50 is connected to the processor 60 of the electronic device 400 and is configured to send a second operating voltage to the processor 60; the processor 60 is configured to control the electronic device 400 to operate normally when the first operating voltage V1 is equal to the second operating voltage V2.

When surge current or voltage appears on the circuit, a microsecond level high voltage pulse appears in the power supply 10 instantaneously, the high voltage pulse signal is superimposed on the working voltage (the voltage may also include the surge voltage) of the device 200 sampled by the signal input end of the first operational amplifier 30, after the working voltage is amplified by the first operational amplifier 30, the working voltage may be higher than a preset safety voltage reference value, if the processor 60 determines to stop protecting based on the surge, the device is not necessary to be turned off, because the surge high voltage and the high current duration are very short, no substantial damage is caused to the device 200, so that the working voltage of the second operational amplifier 50 is increased to synchronize the working voltage of the device 200, and the collected working voltage is the same working voltage as the first operational amplifier 30 and the second operational amplifier 50, and the surge temporarily amplified first working voltage V1 and the second working voltage V2 amplified by the second operational amplifier 50 synchronously fluctuate with the same amplitude at the moment, and the value is equal, and the processor 60 is controlled to operate normally under the condition that the first working voltage V1 and the second working voltage V2 are equal to the electronic device 400. Thus avoiding the problem of shutdown protection caused by surge.

In summary, an embodiment of the present disclosure provides an anti-surge signal acquisition circuit, which is applied to an electronic device, and the circuit includes: a power supply, a first voltage regulator, a first operational amplifier, a second voltage regulator, and a second operational amplifier; the power supply is respectively connected with the first voltage stabilizer and the second voltage stabilizer and is used for supplying power to the first voltage stabilizer and the second voltage stabilizer; the first voltage stabilizer is connected with the first operational amplifier and is used for supplying power to the first operational amplifier after the voltage of the power supply is reduced; the second voltage stabilizer is connected with the second operational amplifier and is used for supplying power to the second operational amplifier after the voltage of the power supply is reduced; the first operational amplifier is connected with a processor of the electronic equipment and is used for sending a first working voltage to the processor; the second operational amplifier is connected with the processor of the electronic equipment and is used for sending a second working voltage to the processor; the processor is used for controlling the electronic equipment to normally operate under the condition that the first working voltage is equal to the second working voltage. The anti-surge signal acquisition circuit provided by the embodiment of the disclosure samples the working voltage of the electronic equipment through the two paths of operation amplifier voltage sampling circuits, and the two paths of operation amplifier voltage sampling circuits are powered by a common power supply, so that the two paths of acquired working voltages containing the surge voltage fluctuate in the same frequency and in the same amplitude, and the problem that the surge test is not passed because the processor of the electronic equipment starts shutdown protection due to the surge test can be avoided.

Fig. 2 is a schematic diagram illustrating an anti-surge signal acquisition circuit according to an example embodiment. As shown in fig. 2, the embodiment of the disclosure provides an anti-surge signal acquisition circuit 100, which is applied to an electronic device 400, and the first voltage regulator 20 is connected to a power supply terminal of the processor 60, and is configured to step down a voltage of the power supply 10 and then supply power to the processor 60. For example, the voltage of the power supply 10 may be 12V and the operating voltage of the processor 60 may be 5V, and the first voltage regulator 20 may be capable of reducing the 12V voltage to 5V to power the processor 60. This allows the ground of the processor 60 to be common to the ground of the power supply 10 and the ground of the first voltage regulator 20, which may further reduce the interference of the surge voltage.

Fig. 3 is a schematic diagram illustrating an anti-surge signal acquisition circuit according to an example embodiment. As shown in fig. 3, the embodiment of the disclosure provides an anti-surge signal acquisition circuit 100, which is applied to an electronic device 400, and the second voltage stabilizer 40 is connected to a power supply terminal of the processor 60, and is used for supplying power to the processor 60 after reducing the voltage of the power supply 10. For example, the voltage of the power supply 10 may be 12V and the operating voltage of the processor 60 may be 5V, and the second voltage regulator 40 may be capable of reducing the 12V voltage to 5V to power the processor 60. This allows the ground of the processor 60 to be common to the ground of the power supply 10 and the ground of the second voltage regulator 40, which may further reduce the interference of the surge voltage.

As shown in fig. 1-3, in some embodiments, a signal input terminal (not shown) of the first operational amplifier 30 is connected to an operating voltage sampling resistor (not shown) of the electronic device 400, for collecting a first operating voltage V1 of the electronic device 400, and an output terminal of the first operational amplifier 30 is connected to a first signal input terminal of the processor 60.

The signal input terminal (not shown) of the second voltage stabilizer 40 is connected to an operating voltage sampling resistor (not shown) of the electronic device 400, and is used for collecting a second operating voltage V2 of the electronic device 400, and the output terminal of the second operational amplifier 50 is connected to the second signal input terminal of the processor 60.

In this way, since the first operational amplifier 30 and the second operational amplifier 50 are the same operating voltage collected at the same time, when a surge occurs, the first operating voltage V1 and the second operating voltage V2 can exhibit the same-frequency same-amplitude fluctuation and have the same value, so that the shutdown protection of the processor 60 is not triggered, and the surge test can be successfully passed.

In some embodiments, the sampling resistor is an operating voltage sampling resistor of an air conditioner compressor or an operating voltage sampling resistor of an air conditioner power factor correction circuit. For example, when the electronic device 400 is an air conditioner, the operating voltage sampling resistor may be an operating voltage sampling resistor of an air conditioner compressor, or may be an operating voltage sampling resistor of an air conditioner power factor correction circuit. Of course, the sampling resistor may be an operating voltage sampling resistor of other types of electronic devices, which is not limited in this disclosure.

In some embodiments, the processor 60 may be an MCU for controlling the electronic device 400 to be shut down in case the first operating voltage V1 is not equal to the second operating voltage V2. For example, when the first operating voltage V1 is not equal to the second operating voltage V2, it is indicated that the operating voltage sampling circuit has a problem, (possibly that the first operational amplifier 30 has a problem, and possibly that the second operational amplifier 50 has a problem), in this case, when a situation in which shutdown protection is actually required occurs, such as a situation in which the compressor is shorted, and the inverter control circuit (the power factor correction circuit) is shorted, the operating voltage sampling circuit cannot sample the fault voltage correctly, the processor 60 may not make a shutdown protection judgment correctly, causing equipment damage and economic loss, so in order to avoid the loss in this situation, the processor 60 controls the electronic equipment 400 to shutdown in order to protect the equipment from possible damage and reduce the economic loss in the situation in which the first operating voltage V1 is not equal to the second operating voltage V2.

In some embodiments, the power supply 10 may be a switching power supply or a linear power supply, with the output voltage comprising 12V.

In some embodiments, the voltage regulator may be DCDC and the output voltage comprises 5V.

In some embodiments, the first operating voltage V1 and the second operating voltage V2 may include surge voltages.

In summary, the embodiment of the disclosure provides an anti-surge signal acquisition circuit, which samples the working voltage of an electronic device through two paths of operational amplifier voltage sampling circuits, and the two paths of operational amplifier voltage sampling circuits are powered by a common power supply, so that the two paths of acquired working voltages containing the surge voltage fluctuate in the same frequency and in the same amplitude, and thus, the processor of the electronic device can be prevented from starting shutdown protection due to surge testing, and the problem that the surge testing fails can be solved.

Fig. 4 is a block diagram of an electronic device, according to an example embodiment. For example, the electronic device 400 may be an air conditioner, a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, or the like. Including an anti-surge signal acquisition circuit 100 (not shown) according to any of the above embodiments.

Referring to fig. 4, an electronic device 400 may include one or more of the following components: a processing component 402, a memory 404, a power component 406, a multimedia component 408, an audio component 410, an input/output interface 412, a sensor component 414, and a communication component 416.

The processing component 402 generally controls overall operation of the electronic device 400, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 402 may include one or more processors 420 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 402 can include one or more modules that facilitate interaction between the processing component 402 and other components. For example, the processing component 402 may include a multimedia module to facilitate interaction between the multimedia component 408 and the processing component 402.

The memory 404 is configured to store various types of data to support operations at the electronic device 400. Examples of such data include instructions for any application or method operating on electronic device 400, contact data, phonebook data, messages, pictures, videos, and the like. The memory 404 may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.

The power supply component 406 provides power to the various components of the electronic device 400. The power components 406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the electronic device 400.

The multimedia component 408 includes a screen between the electronic device 400 and the user that provides an output interface. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or slide action, but also the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 408 includes a front camera and/or a rear camera. When the electronic device 400 is in an operational mode, such as a shooting mode or a video mode, the front-facing camera and/or the rear-facing camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

The audio component 410 is configured to output and/or input audio signals. For example, the audio component 410 includes a Microphone (MIC) configured to receive external audio signals when the electronic device 400 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 404 or transmitted via the communication component 416. In some embodiments, audio component 410 further includes a speaker for outputting audio signals.

The input/output interface 412 provides an interface between the processing component 402 and peripheral interface modules, which may be a keyboard, click wheel, buttons, etc. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.

The sensor assembly 414 includes one or more sensors for providing status assessment of various aspects of the electronic device 400. For example, the sensor assembly 414 may detect an on/off state of the electronic device 400, a relative positioning of the components, such as a display and keypad of the electronic device 400, the sensor assembly 414 may also detect a change in position of the electronic device 400 or a component of the electronic device 400, the presence or absence of a user's contact with the electronic device 400, an orientation or acceleration/deceleration of the electronic device 400, and a change in temperature of the electronic device 400. The sensor assembly 414 may include a proximity sensor configured to detect the presence of nearby objects in the absence of any physical contact. The sensor assembly 414 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 414 may also include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 416 is configured to facilitate communication between the electronic device 400 and other devices, either wired or wireless. The electronic device 400 may access a wireless network based on a communication standard, such as WiFi,2G, or 3G, or a combination thereof. In one exemplary embodiment, the communication component 416 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 416 further includes a Near Field Communication (NFC) module to facilitate short range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the electronic device 400 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic elements for executing the methods described above.

In an exemplary embodiment, a non-transitory computer-readable storage medium is also provided that includes instructions, such as memory 404 that includes instructions, that are executable by processor 420 of electronic device 400. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

In summary, the embodiments of the present disclosure provide an electronic device including an anti-surge signal acquisition circuit, which may be an air conditioner, so that the electronic device may also pass a surge test smoothly.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An anti-surge signal acquisition circuit for use in an electronic device, the circuit comprising: a power supply, a first voltage regulator, a first operational amplifier, a second voltage regulator, and a second operational amplifier;

2. The circuit of claim 1, wherein the first voltage regulator or the second voltage regulator is connected to a power supply terminal of the processor, and is configured to supply power to the processor after reducing a voltage of the power supply.

3. The circuit of claim 1, wherein a signal input end of the first operational amplifier is connected with an operating voltage sampling resistor of the electronic device and is used for collecting a first operating voltage of the electronic device, and an output end of the first operational amplifier is connected with a first signal input end of the processor;

4. A circuit according to claim 3, wherein the sampling resistor is an operating voltage sampling resistor of an air conditioner compressor or an operating voltage sampling resistor of an air conditioner power factor correction circuit.

5. The circuit of claim 1, wherein the processor is an MCU for controlling the electronic device to shut down if the first operating voltage is not equal to the second operating voltage.

6. The circuit of claim 1, wherein the power supply is a switching power supply or a linear power supply and the output voltage comprises 12V.

7. The circuit of claim 1, wherein the voltage regulator is DCDC and the output voltage comprises 5V.

8. The circuit of any of claims 1-7, wherein the first operating voltage and the second operating voltage comprise surge voltages.

9. An electronic device comprising the circuit of any one of claims 1-8.

10. The electronic device of claim 9, wherein the electronic device comprises an air conditioner.