CN113937622B - Electric shock protection method, electronic equipment and discharge equipment - Google Patents
Electric shock protection method, electronic equipment and discharge equipment Download PDFInfo
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Abstract
The utility model provides an electric shock protection method, an electronic device and a discharge device, wherein the electric shock protection method is applied to the discharge device and comprises the steps of obtaining a voltage indication signal, wherein the voltage indication signal is used for indicating the current of a working circuit of the discharge device; determining whether the current belongs to a contact leakage current in the case that the current is determined to be abnormal based on the voltage indication signal; wherein the present current anomaly comprises: the current is out of the current threshold value of the working circuit in the normal working state; and controlling the discharging device to stop discharging in the case that the current belongs to the contact leakage current. The electric shock protection method can realize electric shock protection of the human body, and greatly reduces the risk of electric shock of the human body; in addition, physical isolation is not needed, and the working effect of the discharge equipment is not influenced.
Description
Technical Field
The disclosure relates to the technical field of electric shock safety, and in particular relates to an electric shock protection method, electronic equipment and discharge equipment.
Background
Anion generators are increasingly used in everyday electronic products such as air purifiers, air conditioners, etc. The discharge part of the negative ion generator can ionize the air under the action of high voltage to generate negative ions. The operation of the ionizer determines that a negative high voltage is generated at the discharge site, during which the voltage may reach up to kilovolts. If the human body is between the earth and the discharge part and accidentally contacts the discharge part, a certain current flows through the human body, so that the human body feels an electric shock by mistake.
At present, the existing protection scheme is to separate the human body from the discharge part by physical means, and to arrange the discharge part inside the anion generator or the electronic product, i.e. to protect the discharge part in a built-in manner. Since the negative ion generator needs to ionize air through the discharge portion, releasing negative ions, this requires the discharge portion to be able to contact with air. Therefore, the operation of the ionizer is seriously affected by the built-in discharge portion. In addition, the discharge part needs to be in contact with air, and the separation cannot be completely closed, so that the possibility that a human body mistakenly contacts the discharge part still exists, and the risk of electric shock of the human body still exists.
Disclosure of Invention
In view of the above, an object of the present disclosure is to provide an electric shock protection method, an electronic device and a discharge device, which are used to reduce the risk of electric shock of a human body.
In a first aspect, an embodiment of the present disclosure provides a method for electric shock protection, applied to a discharge device, including:
acquiring a voltage indicating signal, wherein the voltage indicating signal is used for indicating the current of a working circuit of the discharging equipment;
determining whether the present current belongs to a contact leakage current in a case where it is determined that the present current is abnormal based on the voltage indication signal; wherein the present current anomaly comprises: the current is out of a current threshold value of the working circuit in a normal working state;
and controlling the discharge device to stop discharging in the case that the current belongs to the contact leakage current.
In one possible embodiment, the electric shock protection method further includes:
determining whether the current belongs to an open-circuit current or a short-circuit current under the condition that the current is abnormal or not or under the condition that the current does not belong to the contact leakage current;
and controlling the discharging equipment to stop discharging when the current belongs to the open-circuit current or the short-circuit current.
In one possible embodiment, the determining whether the present current belongs to a circuit breaking current or a short circuit current includes:
if the detected current reaches the maximum detectable current, or the voltage value indicated by the voltage indicating signal reaches the maximum detectable voltage, determining that the current belongs to the circuit breaking current;
if the detected current is zero or the voltage value indicated by the voltage indicating signal is zero, determining that the current belongs to the short-circuit current; wherein the detection current is converted from the voltage indication signal.
In a possible embodiment, the voltage indication signal is a signal obtained by amplifying a voltage across a current sensing unit, and the current sensing unit is connected in series in the operating circuit.
In one possible embodiment, determining whether the present current is abnormal based on the voltage indication signal includes:
determining that the current is abnormal if the voltage value indicated by the voltage indication signal is outside a standard voltage threshold; and the standard voltage threshold is related to the voltage threshold of two ends of the current sensing unit when the working circuit is in a normal working state.
In one possible embodiment, determining whether the present current is abnormal based on the voltage indication signal further comprises:
converting the voltage indication signal into a detection current;
determining that the present current is abnormal if the detected current is outside a standard current threshold; wherein the standard current threshold is associated with a current threshold of the operating circuit in a normal operating state.
In one possible embodiment, the determining whether the present current belongs to a contact leakage current includes:
calculating a voltage difference between a voltage value indicated by the voltage indication signal and a standard voltage threshold;
determining that the current belongs to the contact leakage current under the condition that the voltage difference is within a first preset range;
or,
calculating a current difference between the detected current and a standard current threshold;
determining that the present current belongs to the contact leakage current if the current difference is within a second preset range.
In one possible embodiment, the electric shock protection method further includes:
starting a timer after controlling the discharge device to stop discharging;
and when the timer reaches the preset time length, controlling the discharging equipment to recover discharging.
In a second aspect, an embodiment of the present disclosure further provides an electronic device, which includes: a processor and a memory, the memory storing machine readable instructions executable by the processor, the machine readable instructions being executable by the processor when the electronic device is operating to implement the shock protection method described above.
In one possible implementation, the electronic device further includes a current sensing unit, a voltage amplifying unit, and a voltage collecting unit;
the current sensing unit is connected in series in an operating circuit of the discharge device;
the voltage amplifying unit is electrically connected with the current sensing unit and is used for receiving and amplifying the voltages at the two ends of the current sensing unit;
the voltage acquisition unit is electrically connected with the voltage amplification unit and is used for acquiring voltage indication signals.
In a third aspect, an embodiment of the present disclosure further provides a discharging device, which includes the electronic device, a power supply module, and a discharging module;
the power supply module is connected with the discharging module, and the electronic equipment is used for realizing leakage current protection when the discharging module discharges.
The electric shock protection method provided by the embodiment of the disclosure determines whether the current is abnormal based on a voltage indication signal for indicating the current of a working circuit of the discharge device, and further determines whether the current belongs to the contact leakage current under the condition that the current is determined to be abnormal, so that the discharge device is controlled to stop discharging under the condition that the current belongs to the contact leakage current, the electric shock protection of a human body is realized, and the risk of electric shock of the human body is greatly reduced; in addition, physical isolation is not needed, and the working effect of the discharge equipment is not influenced.
In order to make the aforementioned objects, features and advantages of the present disclosure more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the present disclosure or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present disclosure, and other drawings can be obtained by those skilled in the art without inventive exercise.
Fig. 1 shows a schematic structural diagram of an exemplary implementation of a discharge device provided by the present disclosure;
FIG. 2 illustrates a partial structural schematic of an exemplary implementation of a discharge device provided by the present disclosure;
fig. 3 shows a flow chart of the shock protection method provided by the present disclosure;
FIG. 4 is a partial schematic diagram of one implementation of a current sensing unit and a voltage amplifying unit;
fig. 5 shows a schematic structural diagram of an electronic device provided by the present disclosure;
fig. 6 shows a schematic structural diagram of a discharge device provided by the present disclosure.
Fig. 1-2 reference numbers illustrate:
a discharge device 300; a discharge module 310; a power supply module 320; a housing 330; device ground 340.
Detailed Description
In order to make the objects, technical solutions and advantages of the present disclosure more apparent, the technical solutions of the present disclosure will be described clearly and completely below with reference to the accompanying drawings of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without inventive step, are within the scope of protection of the disclosure.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item preceding the word comprises the element or item listed after the word and its equivalent, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
To maintain the following description of the present disclosure clear and concise, a detailed description of known functions and known components is omitted from the present disclosure.
In order to facilitate understanding of the present disclosure, an exemplary discharge device to which the method for protecting a contact provided by the present disclosure may be applied, and concepts of contact current, contact leakage current, and the like will be described first, and then the method for protecting a contact provided by the present disclosure will be described.
Referring to fig. 1 and 2, fig. 1 illustrates a schematic structural diagram of an exemplary implementation of a discharge device 300 provided by the present disclosure, and fig. 2 illustrates a partial schematic structural diagram of an exemplary implementation of a discharge device 300 provided by the present disclosure. The discharge apparatus 300 may include a power supply module 320 and a discharge module 310, the power supply module 320 being connected to the discharge module 310. The discharge device 300 may further include a housing 330, and the housing 330 may be provided with an opening (not shown).
The power supply module 320 is used for providing a working power supply for the discharge module 310. The power module 320 may be generally disposed inside the housing 330.
The discharging module 310 may operate at a voltage provided by the power supply module 320. Illustratively, it may ionize air under the high pressure provided by the power module 320, generating negative ions. The discharge module 310 may be disposed inside or outside the housing 330, or may be movably disposed so as to be inside the housing 330 at some times and to be moved from an opening of the housing 330 to the outside of the housing 330 at other times.
The power supply module 320 may also be connected to a device ground 340 to protect people and prevent equipment damage. It should be understood that the power supply module 320 may be directly connected to the device ground 340, and may also be indirectly connected to the device ground 340 through other components, assemblies, and the like, which is not limited in this application.
The discharge module 310, the power supply module 320, and the device ground 340 may form a loop. Also referred to as an operating circuit in the embodiments of the present application. When the discharge portion is contacted by some living things (e.g., human or animal) in the external environment, the power consumption of the power supply module 320 may be different, and some electrical parameters, such as current, in the operating circuit may be changed accordingly. By using such a change, it is possible to determine whether or not a living body has contacted the discharge module 310, and take a protective measure.
The discharge device 300 may also include electronics (not shown in fig. 1 and 2) that may take advantage of the aforementioned changes in these electrical parameters in the operating circuit to take protective measures against contact leakage currents. In some implementations, the electronic device may implement any of the shock protection methods in the embodiments of the present application, which will be described in detail below.
It should be understood that other necessary components, assemblies, elements, etc. may be included in the discharge apparatus 300, such as a transformer, a pushing structure, etc., which is not limited in this application.
When the discharge device normally works, if a living being contacts the discharge module, a part of current flows into the ground or other parts of the housing through the external conductive connection, but not flows into the ground or other parts of the housing through the original protective grounding wire of the discharge device, and the part of current can be called contact current.
The current flowing through the living being to ground through the biological connection, or flowing from the living being to ground through the application part of the discharge device (e.g. the F-type application part in medical instruments) due to an unexpected external voltage on the living being, may be referred to as leakage current, or contact leakage current.
In a first aspect, a method of shock protection provided by the present disclosure is described in detail. In view of the technical problem that a discharge part needs to be in contact with air, that is, the discharge part cannot be completely sealed by physical isolation, and there still exists a possibility that an organism mistakenly contacts the discharge part, that is, there still exists a risk of an organism getting an electric shock, the electric shock protection method provided by the embodiments of the present disclosure is provided, and by executing the electric shock protection method, the operating state of the discharge device can be controlled, and even if the discharge part of the discharge device is not isolated by physical means, the electric leakage test standard of a patient can be passed, and even if a human body mistakenly contacts the discharge part, the operating state of the discharge device can be timely responded to adjust so that the human body does not feel an electric shock.
Fig. 3 is a flowchart of an electric shock protection method according to an embodiment of the present disclosure. The electric shock protection method is applied to discharge equipment, and the discharge equipment comprises a power supply module, a discharge part and a protection device. Further, in some implementations, the protection device includes a current sensing unit, a voltage amplifying unit, a voltage collecting unit, a voltage-current converting unit, and a processing unit. The electric shock protection method of the embodiment of the disclosure may use a processing unit as an execution main body, wherein the specific steps include S101-S103.
S101, acquiring a voltage indicating signal, wherein the voltage indicating signal is used for indicating the current of the working circuit of the discharging device.
The voltage indication signal may be a signal formed by a voltage difference between two terminals of a certain electrical appliance in the operating circuit. Because the voltage indicating signal is obtained based on the voltage at two ends of a certain electrical appliance, under the condition that the resistance of the electrical appliance is certain, the voltage can reflect the current state of the current flowing through the electrical appliance, namely the current in the working circuit of the discharging equipment. The voltage indication signal can thus be used to indicate the present current of the operating circuit of the discharge device.
In some implementations, the electrical load may include a current sensing unit connected in series in the operating circuit to sense a change in an electrical parameter, such as current, in the operating circuit. For example, a certain resistor originally connected in series between the power supply module and the discharge portion may be used as the current sensing unit, and a resistor may be additionally added between the power supply module and the discharge portion to be used as the current sensing unit, and the like, which is not specifically limited in this embodiment of the disclosure. It should be understood that the current sensing unit may also include other possible components.
Optionally, the voltage indication signal is a signal obtained by amplifying the voltage across the current sensing unit. Specifically, the voltage amplifying unit may be electrically connected to the current sensing unit, and the voltage amplifying unit is configured to receive and amplify the voltage at two ends of the current sensing unit to obtain the voltage indication signal. By adopting the mode, the voltage acquisition unit at the rear end can conveniently and clearly capture signals.
Exemplarily, referring to fig. 4, fig. 4 is a partial structural schematic diagram of an implementation manner of the current sensing unit and the voltage amplifying unit. The current sensing unit and the voltage amplifying unit may include a resistor R1 and an operational amplifier U1. R1 is connected in series in the working circuit. The non-inverting input end and the inverting input end of the U1 are respectively connected with the two ends of the R1, and the output end of the U1 is connected with the voltage acquisition unit. The current sensing unit and the voltage amplifying unit may form a differential amplifying circuit so as to amplify the sensed voltage at the two ends of the resistor R1 and output the amplified voltage to the voltage collecting unit (e.g., an ADC collecting module), so that the voltage collecting unit collects the voltage indicating signal. It should be understood that other possible components may be included in the current sensing unit and the voltage amplifying unit. For example, in order to form a differential amplifier circuit, a resistor with an appropriate resistance value may be connected between the non-inverting input terminal or the inverting input terminal and the output terminal.
In other implementations, a non-contact sensing device may be used to sense a change in an electrical parameter, such as current, in an operating circuit. For example, the current sensing unit may include a light-emitting consumer, which may be connected in series in an operating circuit of the discharge device, and the light level of which varies with the current. The contactless sensing means may comprise a light-sensitive resistor, which may be placed in the vicinity of the illuminable consumer. The photoresistor senses the difference of the brightness, and the resistance of the photoresistor changes, so that the current or the voltage in the sensing device changes. The signal can be picked up by the pick-up unit as an indication signal to indicate the present current of the operating current of the discharge device. The indicator signal may be a voltage indicator signal, a current indicator signal or possibly other electrical parameter indicator signal.
S102, determining whether the current belongs to contact leakage current or not under the condition that the current is determined to be abnormal based on the voltage indication signal; wherein the current abnormality includes: the present current is outside the current threshold of the operating circuit in normal operating conditions.
In some implementations, after the voltage indication signal is acquired, it is further determined whether the voltage indication signal is abnormal, that is, it is determined whether the current indicated by the voltage indication signal is abnormal, so that it can be determined whether the working circuit is abnormal. Here, the present current abnormality includes: the current is out of a current threshold value of the working circuit in a normal working state, wherein the working circuit of the discharging device corresponds to the current threshold value in the normal working state.
It should be understood that the current threshold as in the embodiments of the present application may constitute a threshold range, and that the subsequent voltage threshold may also constitute a threshold range. In some embodiments, each voltage threshold and each current threshold may be understood as a threshold range.
Optionally, the embodiment of the present disclosure shows the following two ways to determine whether the current is abnormal, and certainly, other possible ways may also be adopted to determine whether the current is abnormal, which is not specifically limited in the embodiment of the present disclosure as long as it is determined whether the current is abnormal.
The first method comprises the following steps: since the voltage indication signal is used for indicating the current, it is possible to determine whether the current is abnormal by determining whether the voltage indication signal meets a certain preset condition, where the preset condition may be set to be that the voltage value indicated by the voltage indication signal is outside of the standard voltage threshold.
When determining whether the voltage indicating signal meets the preset condition, namely determining whether the voltage value indicated by the voltage indicating signal is beyond a standard voltage threshold, and determining that the current is abnormal under the condition that the voltage value indicated by the voltage indicating signal is beyond the standard voltage threshold; the standard voltage threshold is related to the voltage threshold at two ends of the current sensing unit when the working circuit is in a normal working state.
Alternatively, the association relationship between the standard voltage threshold and the voltage threshold may be set to be the same, converted or calculated, and the like, where the conversion or calculation is to convert or calculate the voltage threshold according to a conversion rule or a calculation rule to obtain the standard voltage threshold. For example, for a certain electric appliance, the operating current of the internal operating circuit in the normal operating state is a threshold range with a constant value or a small floating range, that is, the voltage at the two ends of the current sensing unit is a threshold range with a constant value or a small floating range, and then the standard voltage threshold may be determined based on the voltage at the two ends of the current sensing unit. In some implementations, the standard voltage threshold can also be understood as a range of thresholds.
And the second method comprises the following steps: after the voltage indication signal is obtained, converting the voltage indication signal into a detection current through a voltage current conversion unit, and determining that the current is abnormal under the condition that the detection current is out of a standard current threshold; wherein the standard current threshold is associated with the current threshold of the working circuit in the normal working state. It should also be noted that the association relationship between the standard current threshold and the current threshold may be set to be the same, converted or calculated, and the like, where the conversion or calculation is to convert or calculate the current threshold according to a conversion rule or a calculation rule to obtain the standard current threshold. For example, for a certain electric appliance, the working current of the internal working circuit in the normal working state is a threshold range with a fixed value or a small floating range, and at this time, the standard current threshold value can be determined based on the voltage at the two ends of the current sensing unit according to the conversion rule. In some implementations, the standard current threshold may also be understood as a range of thresholds.
The current thresholds of the working circuits in different discharge devices in the normal working state may be the same or different, that is, the standard current thresholds corresponding to the working circuits in different discharge devices may be the same or different.
The current is determined to be abnormal through one or two ways, and if the current is abnormal, whether the current belongs to contact leakage current is further determined so as to realize electric shock protection of organisms such as human bodies. Wherein the current abnormality includes: the present current is outside the current threshold of the operating circuit in the normal operating state.
It should be noted that whether the current is abnormal or not can be determined simultaneously in the above two ways. Illustratively, after acquiring the voltage indication signal, it is determined whether the voltage value indicated by the voltage indication signal is outside the standard voltage threshold, and at the same time, the voltage indication signal is converted into a detection current and it is determined whether the detection current is outside the standard current threshold. And if the judgment result is that the voltage value indicated by the voltage indicating signal is out of the standard voltage threshold value or the detected current is out of the standard current threshold value, determining that the current is abnormal. Thus, the accuracy of determining whether the present current is abnormal can be improved.
Optionally, the embodiment of the present disclosure shows two ways of determining whether the current belongs to the contact leakage current, and similarly, other ways may also be used to determine whether the current belongs to the contact leakage current.
The first method comprises the following steps: since the current in the operating circuit changes to a certain extent after a human body or the like contacts a discharge portion of the discharge device, specifically, compared with the current threshold in the normal operating state, and the voltage indication signal is used for indicating the current of the operating circuit of the discharge device, it is possible to determine whether the current belongs to the contact leakage current through the voltage indication signal.
Optionally, the corresponding standard voltage threshold is calculated in advance based on the current threshold in the normal operating state, or the standard voltage threshold in the normal operating state is directly detected, then after the voltage indication signal is obtained, the voltage difference between the voltage value indicated by the voltage indication signal and the standard voltage threshold is calculated, and under the condition that the voltage difference is within the first preset range, it is determined that the current belongs to the contact leakage current. The maximum value of the first preset range is a voltage difference between the standard voltage threshold and the biological contact voltage value, the biological contact voltage value is obtained by detecting a voltage value of the working circuit when the biological contact discharge module is contacted, and the minimum value of the first preset range may be zero or may be set to a value close to zero.
And the second method comprises the following steps: the voltage-current conversion unit in the discharge device is used for converting the voltage indication signal to obtain the detection current, so that whether the current belongs to the contact leakage current or not can be determined by the detection current. By converting the voltage indicative signal into a detected current, the accuracy of the measurement is facilitated compared to existing instruments on the market.
In specific implementation, a corresponding standard voltage threshold is calculated in advance based on a current threshold in a normal working state and is converted into a standard current threshold, then, after a voltage indication signal is obtained and is converted into a detection current, a current difference between the detection current and the standard current threshold is calculated, and if the current difference is within a second preset range, it is determined that the current belongs to the contact leakage current. The maximum value of the second preset range is a current difference between the standard current threshold and the human body contact current threshold, the human body contact current threshold is obtained by converting a biological contact voltage value calculated based on the contact leakage current, and the minimum value of the first preset range may be zero or may be set to a value close to zero.
Note that, in calculating the voltage difference or the current difference, the upper limit value of the standard voltage threshold and the upper limit value of the standard current threshold may be used, or the lower limit value of the threshold may be used, or the intermediate value of the threshold may be used.
Alternatively, the electrical parameter variations caused when different creatures contact the discharge module may be different. For this reason, in some implementations, for different objects that may contact the discharge module, the voltage difference between the object and the standard voltage threshold or the current difference between the object and the standard current threshold may be measured in advance, and the corresponding preset range may be determined.
For example, for the convenience of distinguishing, the corresponding preset voltage difference range may be a third preset range for a human body, and a fourth preset voltage difference range for common pets such as cats and dogs. The third preset range and the fourth preset range may not overlap at all or may partially overlap. Similarly, for a human body, the corresponding current difference preset range may be a fifth preset range, and for common pets such as cats and dogs, the corresponding current difference preset range may be a sixth preset range. The fifth preset range and the sixth preset range may not overlap at all or may partially overlap.
In some application scenarios, contact leakage current protection may be performed only for a portion of the objects. For example, for some medical devices that are only intended for human patients, the safety requirements for leakage current are very high and patients are typically contacted without pets and the like. In such a scenario, it may be determined whether the current calculated voltage difference is within a third preset range, or whether the current calculated current difference is within a fifth preset range, so as to determine whether the current belongs to the contact leakage current.
In other application scenarios, the contact leakage current protection can be performed for all objects. For example, for some household discharge devices (e.g., air purifiers, etc.), the user does not want a human body to touch the discharge module by mistake, nor does the pet in the home touch the discharge module by mistake. In such a scenario, it may be determined whether the currently calculated voltage difference is within a third preset range, and whether the currently calculated voltage difference is within a fourth preset range. That is, it is determined whether the current is at the contact leakage current as well as at the pet contact leakage current. Any one of the conditions can determine that the current belongs to the contact leakage current, and if all the conditions are not satisfied, the current does not belong to the contact leakage current. The determination method using the current difference is similar to that described above, and thus is not described herein again. By adopting the mode, the false touch can be better prevented in certain specific scenes, and the use experience of a user is improved.
It should be understood that the above description is directed to determining whether the present current is in contact leakage for two types of objects, and that the determination may also be made for more different objects, if necessary.
And S103, controlling the discharging device to stop discharging in the case that the current belongs to the contact leakage current.
After determining whether the current belongs to the contact leakage current or not based on the manner, if the current is determined to belong to the contact leakage current, the discharging device is controlled to stop discharging so as to ensure the safety of a human body and the like.
In practical applications, a human body may touch a discharge portion by mistake, for example, the human body only touches the discharge portion for a short time, and in this case, if the discharge device is controlled to continuously maintain a discharge stopping state, the operating efficiency of the discharge device may be affected. Therefore, after the discharge device is controlled to stop discharging, a timer may be started, which is preset with a timing length that is greater than or equal to a length of time that a human body touches the discharge portion by mistake. In some implementations, the length of time that the human body makes contact with the discharge site when erroneously touching the discharge site is determined based on historical electric shock conditions, but the timing length of time needs to be less than the electric leakage test length of time defined by the electric leakage test standard to ensure the safety of the living body erroneously touching the discharge site.
After the timer is started and the timer is determined to reach the preset duration, the discharging equipment is controlled to recover discharging, the voltage indicating signal is obtained again, whether the current is abnormal or not is determined based on the voltage indicating signal, and whether the current belongs to the contact leakage current or not is continuously determined again under the condition that the current is determined to be abnormal; under the condition that the current does not belong to the contact leakage current, namely, the human body does not exist at the discharge part any more, the discharge equipment is controlled to continue discharging; and under the condition that the current belongs to contact leakage current, the human body electric shock still exists at the discharge part, and the discharge equipment is controlled to stop discharging so as to ensure the safety of the human body.
The electric shock protection method provided by the embodiment of the disclosure determines whether the current is abnormal or not based on a voltage indication signal for indicating the current of a working circuit of the discharge device, and further determines whether the current belongs to the contact leakage current or not under the condition that the current is determined to be abnormal, so that the discharge device is controlled to stop discharging under the condition that the current belongs to the contact leakage current, the electric shock protection of a human body is realized, and the risk of electric shock of the human body is greatly reduced; in addition, physical isolation is not needed, and the working effect of the discharge equipment is not influenced.
Further, under the condition that the current is abnormal, whether the current belongs to open-circuit current or short-circuit current can be determined, so that open-circuit protection or short-circuit protection is achieved; of course, it is also possible to determine whether the present current belongs to the open-circuit current or the short-circuit current in the case where it is determined whether the present current belongs to the contact leakage current and it is determined that the present current does not belong to the contact leakage current.
Open circuit means that the resistance between the two ends of the device or apparatus is infinite, i.e., the open circuit current is zero; the short circuit is that the current does not flow through any equipment or device, and is directly connected with two poles of a power supply, and the short circuit current is far larger than the rated current, so that the normal operation of a working circuit is affected no matter the circuit is broken or short-circuited, and even the electronic equipment in which the circuit is located is damaged.
By adopting the implementation mode, the double protection of the working circuit, namely the discharge equipment and the human body can be achieved. On the one hand, the hardware is used for collecting the indicating signal, and the discharge stopping is controlled under the condition that the indicating signal is determined to belong to the leakage current, so that a human body and the like are protected under the condition that the mistaken touch is discriminated, and the first protection is formed. On the other hand, by monitoring whether or not the aforementioned hardware (e.g., a current sensing module, a voltage amplifying module, etc. for sensing and amplifying the instruction signal) is failed, the stop of the discharge is controlled in the case of the failure. By adopting the mode, the discharging is stopped no matter whether the discharging module is touched by mistake or not under the condition that the first protection fails, so that the effective implementation of the first protection is monitored and guaranteed, a double protection mechanism is formed, and the reliability of leakage current protection is improved.
In some implementations, whether the present current is of a circuit-breaking current or a short-circuit current may be determined based on detecting the current and/or voltage indication signal.
As one example, when determining whether the present current belongs to the open current based on the detected current, the following steps may be referred to: and determining whether the detected current reaches the maximum current which can be detected by the protection device, and if the detected current reaches the maximum current which can be detected by the protection device, determining that the current belongs to the circuit breaking current, wherein the maximum current which can be detected by the protection device is mainly determined by a current sensing unit and a voltage amplifying unit which are included in the protection device.
Also as an example, when determining whether the present current belongs to the open-circuit current based on the voltage indication signal, reference may be made to the following steps: and determining that the voltage value indicated by the voltage indication signal reaches the maximum voltage capable of being detected, and if the voltage value indicated by the voltage indication signal is zero, determining that the current belongs to the circuit breaking current. Of course, whether the current belongs to the open circuit current or not can be determined based on the detection current and the voltage indication signal at the same time, and therefore accuracy is improved.
As one example, when determining whether the present current belongs to the short-circuit current based on the detected current, the following steps may be referred to: after the voltage and current conversion unit converts the voltage indication signal into the detection current, whether the detection current is zero or not is determined, and if the detection current is determined to be zero, the current is determined to belong to the short-circuit current.
As another example, the step of determining whether the present current belongs to the short-circuit current based on the voltage indication signal may refer to the steps of: and if the voltage value indicated by the voltage indication signal is zero, determining that the current belongs to the short-circuit current. Likewise, whether the present current belongs to the short-circuit current or not can also be determined based on the detection current and the voltage indication signal at the same time, and the accuracy can be improved under certain scenes.
And under the condition that the current is determined to belong to the open-circuit current or the short-circuit current, controlling the discharging equipment to stop discharging so as to form a double-protection mechanism and avoid damaging the discharging equipment. In specific implementation, the method may further generate a prompt message based on the open-circuit current or the short-circuit current, and send the prompt message to a maintenance person, so that the maintenance person may repair the discharge device.
In a second aspect, an embodiment of the present disclosure provides an electronic device, a schematic structural diagram of the electronic device may be as shown in fig. 5, where the electronic device includes at least a memory 201 and a processor 202, the memory 201 stores a computer program, and the processor 202, when executing the computer program on the memory 201, implements the electric shock protection method provided in any embodiment of the present disclosure. Illustratively, the electronic device computer program steps are as follows S11 to S13:
s11, acquiring a voltage indicating signal, wherein the voltage indicating signal is used for indicating the current of a working circuit of the discharging equipment;
s12, determining whether the current belongs to contact leakage current or not under the condition that the current is determined to be abnormal based on the voltage indication signal; wherein the present current anomaly comprises: the current is out of a current threshold value of the working circuit in a normal working state;
and S13, controlling the discharging equipment to stop discharging under the condition that the current belongs to the contact leakage current.
The processor, when executing the shock protection stored on the memory, further executes the following computer program: determining whether the current belongs to an open-circuit current or a short-circuit current or not under the condition that the current is abnormal or under the condition that the current does not belong to the contact leakage current; and controlling the discharging equipment to stop discharging when the current belongs to the open-circuit current or the short-circuit current.
The processor, in executing the computer program stored on the memory to determine whether the present current belongs to a circuit breaking current or a short circuit current, further executes the computer program of: if the detected current reaches the maximum detectable current, or the voltage value indicated by the voltage indicating signal reaches the maximum detectable voltage, determining that the current belongs to the circuit breaking current; if the detected current is zero or the voltage value indicated by the voltage indicating signal is zero, determining that the current belongs to the short-circuit current; wherein the detection current is converted from the voltage indication signal.
When the processor executes the electric shock protection method stored in the memory, the processor also comprises a voltage indication signal which is a signal obtained by amplifying the voltage at two ends of the current sensing unit, and the current sensing unit is connected in series in the working circuit.
The processor, when executing a computer program stored on the memory that determines whether the present current is abnormal based on the voltage indication signal, further executes: determining that the current is abnormal if the voltage value indicated by the voltage indication signal is outside a standard voltage threshold; and the standard voltage threshold is related to the voltage threshold of two ends of the current sensing unit when the working circuit is in a normal working state.
The processor, when executing a computer program stored on the memory that determines whether the present current is abnormal based on the voltage indication signal, further executes: converting the voltage indication signal into a detection current; determining that the present current is abnormal if the detected current is outside a standard current threshold; wherein the standard current threshold is associated with a current threshold of the operating circuit in a normal operating state.
The processor, in executing the computer program stored on the memory to determine whether the present current is attributable to a contact leakage current, further executes the computer program of: calculating a voltage difference between a voltage value indicated by the voltage indication signal and a standard voltage threshold; determining that the current belongs to the contact leakage current under the condition that the voltage difference is within a first preset range; or, calculating a current difference between the detected current and a standard current threshold; and if the current difference is within a second preset range, determining that the current belongs to the contact leakage current.
When the processor executes the electric shock protection method stored in the memory, the following computer program is also executed: starting a timer after controlling the discharge device to stop discharging; and when the timer reaches the preset time length, controlling the discharging equipment to recover discharging.
With continued reference to fig. 5, the electronic device of the embodiment of the present disclosure further includes a current sensing unit 203, a voltage amplifying unit 204, and a voltage collecting unit 205.
The current sensing unit 203 is connected in series in an operating circuit of the discharge device.
The voltage amplifying unit 204 is electrically connected to the current sensing unit 203, and is configured to receive and amplify the voltage at two ends of the current sensing unit 203.
The voltage acquisition unit 205 is electrically connected to the voltage amplification unit 204 and is configured to acquire a voltage indication signal.
The electric shock protection method provided by the embodiment of the disclosure determines whether the current is abnormal or not based on a voltage indication signal for indicating the current of a working circuit of the discharge device, and further determines whether the current belongs to the contact leakage current or not under the condition that the current is determined to be abnormal, so that the discharge device is controlled to stop discharging under the condition that the current belongs to the contact leakage current, the electric shock protection of a human body is realized, and the risk of electric shock of the human body is greatly reduced; in addition, physical isolation is not needed, and the working effect of the discharge equipment is not influenced.
In a third aspect, as shown in fig. 6, a discharging device provided by the embodiment of the present disclosure includes the electronic device in the second aspect, a power supply module, and a discharging module; the power supply module is connected with the discharge module, and the electronic equipment is connected with the discharge module and used for protecting organisms when the discharge module discharges.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the disclosure herein is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of features described above or equivalents thereof without departing from the spirit of the disclosure. For example, the above features and the technical features disclosed in the present disclosure (but not limited to) having similar functions are replaced with each other to form the technical solution.
Further, while operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limitations on the scope of the disclosure. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
While the present disclosure has been described in detail with reference to the embodiments, the present disclosure is not limited to the specific embodiments, and those skilled in the art can make various modifications and alterations based on the concept of the present disclosure, and the modifications and alterations should fall within the scope of the present disclosure as claimed.
Claims (9)
1. A method for protecting against electric shock, applied to a discharge device, comprising:
acquiring a voltage indicating signal, wherein the voltage indicating signal is used for indicating the current of a working circuit of the discharging equipment; the voltage indication signal is a signal obtained by amplifying the voltage at two ends of the current sensing unit through a voltage amplifying unit, the current sensing unit is connected in series in the working circuit, and the voltage amplifying unit is electrically connected with the current sensing unit;
determining whether the present current belongs to a contact leakage current in a case where it is determined that the present current is abnormal based on the voltage indication signal; wherein the present current anomaly comprises: the current is out of a current threshold value of the working circuit in a normal working state;
controlling the discharge device to stop discharging in the case that the current belongs to the contact leakage current;
determining whether the current belongs to an open-circuit current or a short-circuit current or not under the condition that the current is abnormal or under the condition that the current does not belong to the contact leakage current;
and controlling the discharging equipment to stop discharging when the current belongs to the open-circuit current or the short-circuit current.
2. The shock protection method of claim 1, wherein said determining whether the present current is a short circuit current or a broken circuit current comprises:
if the detected current reaches the maximum detectable current, or the voltage value indicated by the voltage indicating signal reaches the maximum detectable voltage, determining that the current belongs to the circuit breaking current;
if the detected current is zero or the voltage value indicated by the voltage indicating signal is zero, determining that the current belongs to the short-circuit current; wherein the detection current is converted from the voltage indication signal.
3. The shock protection method according to any one of claims 1 or 2, wherein determining whether the present current is abnormal based on the voltage indication signal comprises:
determining that the current is abnormal if the voltage value indicated by the voltage indication signal is outside a standard voltage threshold; and the standard voltage threshold is related to the voltage threshold of two ends of the current sensing unit when the working circuit is in a normal working state.
4. The shock protection method according to any one of claims 1 or 2, wherein determining whether the present current is abnormal based on the voltage indication signal further comprises:
converting the voltage indication signal into a detection current;
determining that the present current is abnormal if the detected current is outside a standard current threshold; wherein the standard current threshold is associated with a current threshold of the operating circuit in a normal operating state.
5. The method of any of claims 1 or 2, wherein the determining whether the present current is due to contact leakage current comprises:
calculating a voltage difference between a voltage value indicated by the voltage indication signal and a standard voltage threshold;
determining that the current belongs to the contact leakage current under the condition that the voltage difference is within a first preset range;
or,
calculating a current difference between the detected current and a standard current threshold;
and determining that the current belongs to the contact leakage current under the condition that the current difference is within a second preset range.
6. The method of shock protection according to any one of claims 1 or 2, further comprising:
starting a timer after controlling the discharge device to stop discharging;
and when the timer reaches a preset time length, controlling the discharging equipment to recover discharging.
7. An electronic device, comprising: a processor and a memory storing machine readable instructions executable by the processor, the machine readable instructions being executable by the processor when the electronic device is operating to implement the shock protection method of any one of claims 1-6.
8. The electronic device of claim 7, further comprising a current sensing unit, a voltage amplifying unit, and a voltage collecting unit;
the current sensing unit is connected in series in an operating circuit of the discharge device;
the voltage amplifying unit is electrically connected with the current sensing unit and is used for receiving and amplifying the voltages at the two ends of the current sensing unit;
the voltage acquisition unit is electrically connected with the voltage amplification unit and is used for acquiring voltage indication signals.
9. A discharge device comprising the electronic device of claim 7 or 8, a power supply module, and a discharge module;
the power supply module is connected with the discharging module, and the electronic equipment is used for realizing leakage current protection when the discharging module discharges.
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