CN112415252A - Method for measuring residual voltage of power plug and computer equipment - Google Patents
Method for measuring residual voltage of power plug and computer equipment Download PDFInfo
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- CN112415252A CN112415252A CN202011231233.4A CN202011231233A CN112415252A CN 112415252 A CN112415252 A CN 112415252A CN 202011231233 A CN202011231233 A CN 202011231233A CN 112415252 A CN112415252 A CN 112415252A
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- 239000003990 capacitor Substances 0.000 claims abstract description 86
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- 238000004590 computer program Methods 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 4
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- 238000012360 testing method Methods 0.000 abstract description 15
- 238000011076 safety test Methods 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 230000001629 suppression Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention discloses a measuring method of power plug residual voltage and computer equipment. The method comprises the following steps: acquiring a circuit schematic diagram corresponding to the power plug; determining a target capacitance set and a discharge resistance set according to the circuit schematic diagram; and determining the residual voltage of the power plug according to the target capacitor set, the discharge resistor set and preset discharge time. According to the method and the device, after the circuit schematic diagram corresponding to the power plug is determined, the residual voltage of the power plug can be rapidly determined through the target capacitor set and the discharge resistor set in the circuit schematic diagram, so that an actual test is replaced, and a designer can conveniently determine whether circuit parameters in the circuit schematic diagram are correct or not according to the residual voltage.
Description
Technical Field
The invention relates to the technical field of circuit safety, in particular to a method for measuring residual voltage of a power plug and computer equipment.
Background
The safety test of the liquid crystal display television is a necessary test item of 3C authentication, the safety test comprises a residual voltage test of a plugging power plug, and the residual voltage test of the plugging power plug aims to prevent the plug from being electrified for a long time when a power line is plugged, so that the personal safety of a consumer is threatened.
At present, parameters of a power plug part circuit of a prototype are generally determined through empirical values, and after the prototype is manufactured, residual voltage is obtained through actual tests of safety testers, so that time and labor are wasted.
Therefore, the prior art is yet to be further improved.
Disclosure of Invention
The invention provides a measuring method and computer equipment for residual voltage of a power plug, which can quickly determine the residual voltage of the power plug through a target capacitance set and a discharge resistance set in a circuit schematic diagram after determining the circuit schematic diagram corresponding to the power plug, replace actual test and facilitate designers to determine whether circuit parameters in the circuit schematic diagram are correct or not in time according to the residual voltage.
In a first aspect, an embodiment of the present invention provides a method for measuring a residual voltage of a power plug, including:
acquiring a circuit schematic diagram corresponding to the power plug;
determining a target capacitance set and a discharge resistance set according to the circuit schematic diagram;
and determining the residual voltage of the power plug according to the target capacitance set and the discharge resistance set.
In one implementation, the determining the residual voltage of the power plug according to the target capacitance set and the discharge resistance set specifically includes:
determining an equivalent capacitance value corresponding to the target capacitance set;
determining an equivalent resistance value corresponding to the discharge resistance set;
and determining the residual voltage of the power plug according to the equivalent capacitance value and the equivalent resistance value.
In one implementation, the target capacitor set includes a plurality of target capacitors, a first end of each target capacitor is electrically connected to the live wire of the power plug, and a second end of each target capacitor is electrically connected to the neutral wire of the power plug; the discharge resistor set comprises a plurality of discharge resistors, and the discharge resistors are used for discharging the target capacitors.
In one implementation, any two target capacitances in the set of target capacitances are connected in parallel; the determining the equivalent capacitance value corresponding to the target capacitance set specifically includes:
obtaining capacitance values respectively corresponding to each target capacitor in the target capacitor set;
and determining parallel capacitance values corresponding to the target capacitors according to the capacitance values respectively corresponding to the target capacitors, and taking the determined parallel capacitance values as equivalent capacitance values.
In one implementation, the determining an equivalent resistance value corresponding to the discharge resistance set specifically includes:
determining a plurality of parallel resistance sets in the discharge resistance set;
determining parallel equivalent values respectively corresponding to each parallel resistance set;
and calculating the sum of all the parallel equivalent values to obtain the equivalent resistance value.
In one implementation, the determining the residual voltage of the power plug according to the equivalent capacitance value and the equivalent resistance value specifically includes:
acquiring preset discharge time;
determining an initial voltage value corresponding to the equivalent capacitance value;
and determining the residual voltage of the power plug according to the initial voltage value, the equivalent capacitance value, the equivalent resistance value and the discharge time.
In an implementation manner, the determining an initial voltage value corresponding to the equivalent capacitance value specifically includes:
and acquiring a mains supply voltage value, and determining an initial voltage value corresponding to the equivalent capacitance value according to the mains supply voltage value.
In one implementation, the determining the residual voltage of the power plug according to the initial voltage value, the discharge time, the equivalent capacitance value, and the equivalent resistance value specifically includes:
calculating the product of the equivalent capacitance value and the equivalent resistance value to obtain a time constant;
and determining the discharge voltage corresponding to the discharge time of the target capacitor set through a capacitor charge-discharge formula according to the time constant, the initial voltage value and the discharge time, and taking the discharge voltage as the residual voltage.
In a second aspect, the present invention provides a computer device comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:
acquiring a circuit schematic diagram corresponding to the power plug;
determining a target capacitance set and a discharge resistance set according to the circuit schematic diagram;
and determining the residual voltage of the power plug according to the target capacitance set and the discharge resistance set.
In a third aspect, the present invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of:
acquiring a circuit schematic diagram corresponding to the power plug;
determining a target capacitance set and a discharge resistance set according to the circuit schematic diagram;
and determining the residual voltage of the power plug according to the target capacitance set and the discharge resistance set.
Compared with the prior art, the embodiment of the invention has the following advantages:
in the embodiment of the invention, a circuit schematic diagram corresponding to the power plug is obtained; determining a target capacitance set and a discharge resistance set according to the circuit schematic diagram; and determining the residual voltage of the power plug according to the target capacitance set and the discharge resistance set. According to the method and the device, after the circuit schematic diagram corresponding to the power plug is determined, the residual voltage of the power plug can be rapidly determined through the target capacitor set and the discharge resistor set in the circuit schematic diagram, so that an actual test is replaced, and a designer can conveniently determine whether circuit parameters in the circuit schematic diagram are correct or not according to the residual voltage.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart illustrating a method for measuring residual voltage of a power plug according to an embodiment of the present invention;
FIG. 2 is an AC jamming circuit in accordance with an embodiment of the present invention;
fig. 3 is an internal structural diagram of a computer device in an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The inventor finds that the safety test of the liquid crystal display television is a necessary test item of 3C certification, the safety test comprises a residual voltage test of a plugging power plug, and the residual voltage test of the plugging power plug aims to prevent the plug from being electrified for a long time when a power line is plugged, so that the personal safety of a consumer is threatened.
At present, parameters of a power plug part circuit of a prototype are generally determined through empirical values, and after the prototype is manufactured, the actual test is carried out by safety testers, so that time and labor are wasted.
In order to solve the above problem, in the embodiment of the present invention, a schematic diagram of a circuit corresponding to a power plug is obtained; determining a target capacitance set and a discharge resistance set according to the circuit schematic diagram; and determining the residual voltage of the power plug according to the target capacitor set, the discharge resistor set and preset discharge time. According to the method and the device, after the circuit schematic diagram corresponding to the power plug is determined, the residual voltage of the power plug can be rapidly determined through the target capacitor set and the discharge resistor set in the circuit schematic diagram, so that an actual test is replaced, and a designer can conveniently determine whether circuit parameters in the circuit schematic diagram are correct or not according to the residual voltage.
The method for measuring the residual voltage of the power plug provided by the embodiment of the invention can be applied to electronic equipment, such as a PC (personal computer), a server and the like. The electronic device applying the method for measuring the residual voltage of the power plug can be used for testing the residual voltage of the power plug only, and can also be used for designing a circuit schematic diagram and testing the residual voltage of the power plug. In addition, the functions realized by the method can be realized by calling application program codes through processing in the electronic equipment, and the program codes can be saved in a computer storage medium.
Referring to fig. 1, fig. 1 shows a method for measuring a residual voltage of a power plug in an embodiment of the present invention, and in this embodiment, the method may include the following steps:
and S1, obtaining a circuit schematic diagram corresponding to the power plug.
In the embodiment of the invention, a circuit schematic diagram corresponding to the power plug is a schematic diagram commonly used in the field, and comprises a schematic diagram of an alternating current anti-interference circuit part.
Common mode interference and differential mode interference exist on two alternating current incoming lines of the switching power supply, the common mode interference is an interference signal existing on the two alternating current incoming lines, the common mode interference is equal to the reference point in size, and the common mode interference is in the same direction, such as electromagnetic induction. Differential mode interference is an interference signal existing on two AC incoming lines, and is equal in magnitude and opposite in direction relative to a reference point, such as instantaneous fluctuation of a power grid voltage. The two interferences are present in different proportions.
In a switching power supply, the current and voltage of a rectifying circuit and a switching tube rapidly rise or fall, and the current of an inductor and a capacitor also rapidly changes, which all form an electromagnetic interference source. In order to reduce the influence of interference signals on the normal working conditions of other electronic equipment through a power grid and reduce the influence of the interference signals on audio and video signals of the equipment, an alternating current anti-interference circuit is required to be added at the input end of a power supply.
Referring to fig. 2, the ac anti-interference circuit includes an ac block XS901, a negative temperature coefficient thermistor RT901, a fuse F901, a first common mode choke L901, a second common mode choke L902, a first capacitor CY901, a second capacitor CX901, a third capacitor CY902, a fourth capacitor CY903, a fifth capacitor CY904, a sixth capacitor CX902, a first resistor R901, a second resistor R902, a third resistor R903, a fourth resistor R904, a fifth resistor R905, and a sixth resistor R906.
The first end of the alternating current seat XS901 is electrically connected with a zero line N, the third end of the alternating current seat XS901 is electrically connected with a live line L, the first end of the alternating current seat XS901 is electrically connected with one end of the negative temperature coefficient thermistor RT901, and the first end of the alternating current seat XS901 is electrically connected with one end of the connecting fuse F901. The negative temperature coefficient thermistor RT901 is used for reducing the impact current at the moment of alternating current starting, and has the following characteristics: when the temperature is reduced, the resistance value is increased; when the temperature rises, the resistance value is reduced; the fuse F901 is an unrecoverable fuse, when a short circuit occurs in a circuit, the current flowing through the fuse F901 can be rapidly increased, and when the current of the fuse F901 is greater than a threshold value corresponding to the fuse F901, the fuse F901 can be fused, so that the safety of the circuit is enhanced.
The other end of the negative temperature coefficient thermistor RT901 is electrically connected to the first end of the first common mode choke coil L901, and the other end of the negative temperature coefficient thermistor RT901 is further grounded through the first capacitor CY 901; the second capacitance CX901 is connected across the first end and the fourth end of the first common mode choke coil L901.
The other end of the fuse F901 is electrically connected to the fourth end of the first common mode choke coil L901, and the fourth end of the first common mode choke coil L901 is grounded through a third capacitor CY 902.
A second terminal of the first common mode choke coil L901 is grounded through the fourth capacitor CY903, and a third terminal of the first common mode choke coil L901 is grounded through the fifth capacitor CY 904; the second end of the first common mode choke coil L901 is also electrically connected to one end of the first resistor R901.
The other end of the first resistor R901 is electrically connected to one end of the second resistor R902, the other end of the second resistor R902 is electrically connected to one end of the third resistor R903, and the other end of the third resistor R903 is grounded through the fifth capacitor CY 904.
The other end of the first resistor R901 is further electrically connected to one end of the fourth resistor R904, the other end of the fourth resistor R904 is electrically connected to one end of the fifth resistor R905, the other end of the fifth resistor R905 is electrically connected to one end of the sixth resistor R906, and the other end of the sixth resistor R906 is grounded through the fifth capacitor CY 904.
The other end of the first resistor R901 is further electrically connected to a first end of the second common mode choke coil L902, a fourth end of the second common mode choke coil L902 is grounded through the fifth capacitor CY904, the sixth capacitor CX902 is bridged between the first end of the second common mode choke coil L902 and the fourth end of the second common mode choke coil L902, and a second end and a third end of the second common mode choke coil L902 are connected to a subsequent circuit.
And S2, determining a target capacitor set and a discharge resistor set according to the circuit schematic diagram, wherein the target capacitor set comprises a plurality of target capacitors, a first end of each target capacitor is electrically connected with a live wire of the power plug, and a second end of each target capacitor is electrically connected with a zero wire of the power plug.
In the embodiment of the invention, the target capacitor set comprises a plurality of target capacitors, and each target capacitor is bridged on a live wire and a zero wire of the power plug; the discharge resistor set comprises a plurality of discharge resistors, and the discharge resistors are used for discharging the target capacitors.
As shown in the circuit diagram of fig. 2, the first common mode choke coil L901 and the second common mode choke coil L902 are formed by winding two coils having the same winding direction around a closed core with high permeability, and have a strong effect of suppressing common mode interference.
The first common mode choke coil L901 and the second common mode choke coil L902 also have equivalent components of a differential mode choke coil, the differential mode choke coil has a strong suppression effect on differential mode interference, the second capacitor CX901 and the sixth capacitor CX902 are differential mode capacitors, the differential mode capacitors are capacitors bridged between a zero line and a live line, and the first common mode choke coil L901, the second common mode choke coil L902, the second capacitor CX901 and the sixth capacitor CX902 form a differential mode interference suppression network. That is, in the circuit diagram shown in fig. 2, the target capacitance set includes two target capacitances CX901 and CX902, respectively. The first end of the second capacitor CX901 is electrically connected with the live wire of the power plug, the second capacitor CX901 is electrically connected with the zero wire of the power plug, the first end of the sixth capacitor CX902 is electrically connected with the live wire of the power plug, and the second end of the sixth capacitor CX902 is electrically connected with the zero wire of the power plug.
The second capacitor CX901 and the sixth capacitor CX902 are both X-type capacitors, and the X-type capacitors are bridged on the live line L and the zero line N. The first capacitor CY901, the third capacitor CY902, the fourth capacitor CY903 and the fifth capacitor CY904 are Y-type capacitors, and the Y-type capacitors are connected across a zero line N and a ground line or a live line L and a ground line.
In order to prevent the power plug from being electrified for a long time during plugging and unplugging, the discharge resistors with concentrated discharge resistors are used for discharging, and the first resistor R901, the second resistor R902, the third resistor R903, the fourth resistor R904, the fifth resistor R905 and the sixth resistor R906 are all discharge resistors.
And S3, determining the residual voltage of the power plug according to the target capacitance set and the discharge resistance set.
In the embodiment of the present invention, in the circuit diagram shown in fig. 2, the voltage of the power plug is actually the voltage across the second capacitor CX901 and the sixth capacitor CX 902. The specific steps of detecting the voltages on the second capacitance CX901 and the sixth capacitance CX902 are as follows:
and S31, determining the equivalent capacitance value corresponding to the target capacitance set.
In the embodiment of the invention, the capacitance value corresponding to each target capacitor in the target capacitor set is obtained; and determining parallel capacitance values corresponding to the target capacitors, and taking the determined parallel capacitance values as equivalent capacitance values. In practical application, the capacitance values respectively corresponding to each target capacitor can be automatically read through equipment, and the parallel capacitance values corresponding to the target capacitors are calculated.
In the circuit shown in fig. 2, the target capacitances are the second capacitance CX901 and the sixth capacitance CX902, respectively, the second capacitance CX901 and the sixth capacitance CX902 are connected in parallel, the first capacitance value of the second capacitance CX901 and the first capacitance value of the sixth capacitance CX902 are obtained, and the equivalent capacitance value is calculated through the parallel connection relationship between the second capacitance CX901 and the sixth capacitance CX 902.
For example, when the first capacitance value is 0.22uF and the second capacitance value is 0.22uF, the equivalent capacitance value is 0.44 uF.
And S32, determining the equivalent resistance value corresponding to the discharge resistance set.
In the embodiment of the invention, a plurality of parallel resistance sets in the discharge resistance set are determined; determining parallel equivalent values respectively corresponding to each parallel resistance set; and calculating the sum of all the parallel equivalent values to obtain the equivalent resistance value.
In the circuit diagram shown in fig. 2, the several sets of parallel resistors include: the first parallel resistor set is composed of the first resistor R901 and the fourth resistor R904, the second parallel resistor set is composed of the second resistor R902 and the fifth resistor R905, and the third parallel resistor set is composed of the third resistor R903 and the sixth resistor R906. And determining a first parallel equivalent value corresponding to the first parallel resistance set, determining a second parallel equivalent value corresponding to the second parallel resistance set, and determining a third parallel equivalent value corresponding to the third parallel resistance set. And calculating the sum of the first parallel equivalent value, the second parallel equivalent value and the third parallel equivalent value to obtain the equivalent resistance value. In practical application, the resistance value corresponding to each discharge resistor can be automatically read by equipment, and the equivalent resistance value is calculated.
For example, in the circuit diagram shown in fig. 2, assuming that the resistance values of the first resistor R901, the second resistor R902, the third resistor R903, the fourth resistor R904, the fifth resistor R905, and the sixth resistor R906 are all 1M, the first parallel equivalent value, the second parallel equivalent value, and the third parallel equivalent value are all 0.5M, and it is possible to determine that the equivalent resistance value is 1.5M.
And S33, determining the residual voltage of the power plug according to the equivalent capacitance value and the equivalent resistance value.
In the embodiment of the invention, the preset discharge time is obtained; determining an initial voltage value corresponding to the equivalent capacitance value; and determining the residual voltage of the power plug according to the initial voltage value, the equivalent capacitance value, the equivalent resistance value and the discharge time.
Specifically, safety standards stipulate that when the power line of the electrical device in operation is unplugged, the voltage charged across the power line plug must be less than 36V within 2s, that is, the detected residual voltage should be the voltage on the second capacitor CX901 and the sixth capacitor CX902 2s after the power line plug is unplugged.
Further, a mains voltage value is obtained, and an initial voltage value corresponding to the equivalent capacitance value is determined according to the mains voltage value. Domestic mains voltage is effective value 220V, then the corresponding peak voltage is:
i.e. V0Calculated V0I.e. the initial voltage value.
In the embodiment of the invention, the product of the equivalent capacitance value and the equivalent resistance value is calculated to obtain a time constant; and determining the discharge voltage corresponding to the discharge time of the target capacitor set through a capacitor charge-discharge formula according to the time constant, the initial voltage value and the discharge time, and taking the discharge voltage as the residual voltage.
The residual voltage can be determined by equation (1).
Wherein C is an equivalent capacitance value, and R is an equivalent resistance value; t is a predetermined discharge time, V0Is an initial voltage, VtIs the residual voltage.
In the embodiment of the invention, the device applying the method for measuring the residual voltage of the power plug can automatically acquire the circuit schematic diagram corresponding to the power plug, determine the target capacitance set and the equivalent capacitance value corresponding to the target capacitance set according to the circuit schematic diagram, and determine the discharge resistance set and the equivalent resistance value corresponding to the discharge resistance set according to the circuit schematic diagram; the discharge time and the initial voltage value may be pre-stored in a memory of the device, and then the residual voltage of the power plug may be determined according to the initial voltage value, the equivalent capacitance value, the equivalent resistance value, and the discharge time.
According to the method and the device, after the circuit schematic diagram corresponding to the power plug is determined, the residual voltage of the power plug can be rapidly determined through the target capacitor set and the discharge resistor set in the circuit schematic diagram, so that an actual test is replaced, and a designer can conveniently determine whether circuit parameters in the circuit schematic diagram are correct or not according to the residual voltage.
In one embodiment, the present invention provides a computer device, which may be a terminal, having an internal structure as shown in FIG. 3. The computer device comprises a processor, a memory, a network model interface, a display screen and an input device which are connected through a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network model interface of the computer device is used for communicating with an external terminal through network model connection. The computer program is executed by a processor to implement a method of measuring a residual voltage of a power plug. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the illustration in fig. 3 is merely a block diagram of a portion of the structure associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
The embodiment of the invention provides computer equipment, which comprises a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to realize the following steps:
acquiring a circuit schematic diagram corresponding to the power plug;
determining a target capacitance set and a discharge resistance set according to the circuit schematic diagram;
and determining the residual voltage of the power plug according to the target capacitance set and the discharge resistance set.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the following steps:
acquiring a circuit schematic diagram corresponding to the power plug;
determining a target capacitance set and a discharge resistance set according to the circuit schematic diagram;
and determining the residual voltage of the power plug according to the target capacitance set and the discharge resistance set.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for measuring residual voltage of a power plug is characterized by comprising the following steps:
acquiring a circuit schematic diagram corresponding to the power plug;
determining a target capacitance set and a discharge resistance set according to the circuit schematic diagram;
and determining the residual voltage of the power plug according to the target capacitance set and the discharge resistance set.
2. The method for measuring the residual voltage of the power plug according to claim 1, wherein the determining the residual voltage of the power plug according to the target capacitance set and the discharge resistance set specifically comprises:
determining an equivalent capacitance value corresponding to the target capacitance set;
determining an equivalent resistance value corresponding to the discharge resistance set;
and determining the residual voltage of the power plug according to the equivalent capacitance value and the equivalent resistance value.
3. The method according to claim 2, wherein the target capacitor set comprises a plurality of target capacitors, a first terminal of each target capacitor is electrically connected to the live wire of the power plug, and a second terminal of each target capacitor is electrically connected to the neutral wire of the power plug; the discharge resistor set comprises a plurality of discharge resistors, and the discharge resistors are used for discharging the target capacitors.
4. The method for measuring residual voltage of power plug according to claim 3, wherein any two target capacitors in the target capacitor set are connected in parallel; the determining the equivalent capacitance value corresponding to the target capacitance set specifically includes:
obtaining capacitance values respectively corresponding to each target capacitor in the target capacitor set;
and determining parallel capacitance values corresponding to the target capacitors according to the capacitance values respectively corresponding to the target capacitors, and taking the determined parallel capacitance values as equivalent capacitance values.
5. The method for measuring residual voltage of a power plug according to claim 3, wherein the determining the equivalent resistance value corresponding to the discharge resistance set specifically includes:
determining a plurality of parallel resistance sets in the discharge resistance set;
determining parallel equivalent values respectively corresponding to each parallel resistance set;
and calculating the sum of all the parallel equivalent values to obtain the equivalent resistance value.
6. The method for measuring the residual voltage of the power plug according to claim 2, wherein the determining the residual voltage of the power plug according to the equivalent capacitance value and the equivalent resistance value specifically comprises:
acquiring preset discharge time;
determining an initial voltage value corresponding to the equivalent capacitance value;
and determining the residual voltage of the power plug according to the initial voltage value, the equivalent capacitance value, the equivalent resistance value and the discharge time.
7. The method for measuring residual voltage of a power plug according to claim 6, wherein the determining an initial voltage value corresponding to the equivalent capacitance value specifically includes:
and acquiring a mains supply voltage value, and determining an initial voltage value corresponding to the equivalent capacitance value according to the mains supply voltage value.
8. The method for measuring the residual voltage of the power plug according to claim 6, wherein the determining the residual voltage of the power plug according to the initial voltage value, the discharge time, the equivalent capacitance value and the equivalent resistance value specifically comprises:
calculating the product of the equivalent capacitance value and the equivalent resistance value to obtain a time constant;
and determining the discharge voltage corresponding to the discharge time of the target capacitor set through a capacitor charge-discharge formula according to the time constant, the initial voltage value and the discharge time, and taking the discharge voltage as the residual voltage.
9. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 1 to 8 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 8.
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