CN117949718A - Voltage detection system, method and device - Google Patents
Voltage detection system, method and device Download PDFInfo
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Abstract
The application discloses a voltage detection system, a voltage detection method and a voltage detection device. The voltage detection system comprises an alternating current power supply end, a micro control circuit and at least one switch channel which are connected in sequence; the alternating current power supply end is respectively connected with the micro control circuit and the switch channel and is used for providing alternating current for the micro control circuit and the switch channel; the micro control circuit is used for sending a switch control instruction to the switch channel, and the switch control instruction is used for controlling the switch state of the switch channel; the switch channel is used for executing switch actions according to the switch control instruction; the micro control circuit is also used for detecting the output voltage of the switch channel and determining whether the output state of the switch channel is abnormal or not according to the output voltage. The application can accurately detect the output voltage of the voltage detection system, and realizes the rapid and accurate detection effect on the voltage values of the multipath output channels.
Description
Technical Field
The present application relates to the field of electrical signal detection technologies, and in particular, to a voltage detection system, method, and apparatus.
Background
At present, the following problems exist in the annunciator: the signal machine is connected to each signal lamp by arranging an alternating current power line to a road underground pipeline, and the middle part of the signal machine generally passes through the pipeline, a handshake well and a twisting line, so that water inflow at a joint or electric leakage among cables caused by loose winding of an insulating adhesive tape can occur. In addition, the ac power cord may have a thin insulation layer due to strain, animal tear and skin breakage, or degradation of insulation performance after aging due to long time, and thus cause electric leakage between cables.
To solve the above problems, in the output line of the conventional signal, whether the output voltage exists or not is usually detected by an optocoupler, so as to determine whether the cable of the signal is leaking or not. For example, a threshold is set on the hardware, when the output voltage of the signal machine is higher than the threshold, the other side of the optocoupler outputs a high level or a low level, and the level signal is identified by the singlechip, so that whether the output voltage exists on the output channel or not is judged, but the magnitude of the output voltage value cannot be detected. In addition, the difference of the current transmission ratio of the hard optocoupler along with the temperature and the current value causes larger transmission ratio error of the optocoupler, the error is about +/-50%, and the error can cause the threshold error of the output voltage to be close to about +/-50%, so that the accuracy of the voltage detection result is affected.
Disclosure of Invention
The embodiment of the application aims to provide a voltage detection system, a voltage detection method and a voltage detection device, which are used for solving the problem of inaccurate detection of output voltage of a signal machine in the prior art.
In order to solve the technical problems, the embodiment of the application is realized as follows:
In one aspect, an embodiment of the present application provides a voltage detection system, including an ac power supply terminal, and a micro control circuit and at least one switching channel connected in sequence;
The alternating current power supply end is respectively connected with the micro control circuit and the switch channel and is used for providing alternating current for the micro control circuit and the switch channel;
the micro control circuit is used for sending a switch control instruction to the switch channel, and the switch control instruction is used for controlling the switch state of the switch channel; the switch state comprises a closed state or an open state;
The switch channel is used for executing switch actions according to the switch control instruction;
The micro control circuit is also used for detecting the output voltage of the switch channel and determining whether the output state of the switch channel is abnormal or not according to the output voltage.
In another aspect, an embodiment of the present application provides a voltage detection method, applied to the voltage detection system according to the above aspect, the method includes:
Generating a switch control instruction;
sending a switch control instruction to the switch channel to control the switch state of the switch channel; the switch state comprises a closed state or an open state;
Detecting an output voltage of the switching channel;
And determining whether the switch channel is in a leakage state according to the output voltage and the switch control instruction.
In still another aspect, an embodiment of the present application provides a voltage detection device applied to the voltage detection system according to the above aspect, where the device includes:
The generating module is used for generating a switch control instruction;
The control module is used for sending a switch control instruction to the switch channel so as to control the switch state of the switch channel; the switch state comprises a closed state or an open state;
The detection module is used for detecting the output voltage of the switch channel;
and the determining module is used for determining whether the output state of the switch channel is abnormal according to the output voltage and the switch control instruction.
In yet another aspect, an embodiment of the present application provides an electronic device, including a processor and a memory electrically connected to the processor, where the memory stores a computer program, and the processor is configured to call and execute the computer program from the memory to implement the voltage detection method described above.
The voltage detection system provided by the embodiment of the application comprises an alternating current power supply end, a micro control circuit, at least one switch channel and a plurality of switching channels, wherein the micro control circuit and the at least one switch channel are sequentially connected, and the alternating current power supply end is respectively connected with the micro control circuit and the switch channel and is used for providing alternating current for the micro control circuit and the switch channel; the micro control circuit is used for sending a switch control instruction to the switch channel, and the switch control instruction is used for controlling the switch state of the switch channel; the switch state includes a closed state or an open state; the switch channel is used for executing switch actions according to the switch control instructions; and the micro control circuit is also used for detecting the output voltage of the switch channel and determining whether the switch channel is in a leakage state according to the output voltage. The micro control circuit can collect the output voltage of the switch channel, so that the output state of the switch channel, namely whether the output state of the voltage detection system is abnormal, can be detected, and the accurate voltage value (namely the value of the output voltage) when the output state is abnormal can be detected, thereby realizing the effect of accurately detecting the output voltage. In addition, under the condition that the voltage detection system comprises a plurality of switch channels, because the alternating current power supply end and the micro control circuit are respectively connected with each switch channel, the micro control circuit can collect the output voltage of each switch channel, so that the output state of each switch channel and the accurate voltage value when the output state is abnormal are detected, the voltage detection of different switch channels is not affected, and the rapid and accurate detection effect on the voltage values of multiple output channels is realized.
Drawings
In order to more clearly illustrate one or more embodiments of the present application or the technical solutions in the prior art, the following description will briefly describe the drawings used in the embodiments or the description of the prior art, and it is apparent that the drawings in the following description are only some embodiments described in one or more embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic block diagram of a voltage detection system according to an embodiment of the application;
FIG. 2 is a schematic block diagram of a voltage detection system according to another embodiment of the application;
FIG. 3 is a schematic circuit diagram of a voltage detection system according to an embodiment of the application;
FIG. 4 is a schematic flow chart of a voltage detection method according to an embodiment of the application;
FIG. 5 is a schematic block diagram of a voltage detection device according to an embodiment of the application;
Fig. 6 is a schematic block diagram of an electronic device in accordance with an embodiment of the present application.
Detailed Description
The embodiment of the application provides a voltage detection system, a voltage detection method and a voltage detection device, which are used for solving the problem of inaccurate detection of output voltage of a signal machine in the prior art.
In order to make the technical solution of the present application better understood by those skilled in the art, the technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, shall fall within the scope of the application.
Fig. 1 is a schematic block diagram of a voltage detection system according to an embodiment of the present application, and as shown in fig. 1, the voltage detection system includes an ac power supply terminal 10, and a micro control circuit 20 and at least one switching channel 30 connected in sequence. Wherein:
The ac power supply terminal 10 is connected to the micro control circuit 20 and the switching channel 30, respectively, for supplying ac power to the micro control circuit 20 and the switching channel 30.
The micro control circuit 20 is configured to send a switch control instruction to the switch channel 30, where the switch control instruction is used to control a switch state of the switch channel 30; the switch state includes a closed state or an open state.
A switching channel 30 for performing switching operation according to a switching control instruction. The switching channel 30 may be connected to a load to control the load by a switching action.
The micro control circuit 20 is further configured to detect an output voltage of the switching channel 30, and determine whether the output state of the switching channel 30 is abnormal according to the output voltage.
As can be seen from fig. 1, the voltage detection system may include a plurality of switching channels 30, each switching channel 30 being connected to the ac power supply terminal 10 and the micro control circuit 20, so that the ac power supply terminal 10 can supply power to each switching channel 30, and the micro control circuit 20 can collect an output voltage of each switching channel 30 and detect whether an output state of each switching channel 30 is abnormal. For the sake of brevity, fig. 1 shows only two switch channels 30, and if more switch channels are connected, the connection mode of each switch channel is the same, all switch channels are connected to the same micro-control circuit 20, and all switch channels and micro-control circuits 20 use the ac power supply terminal 10 as the reference ground. Alternatively, the ac power terminal 10 is an external power line.
In this embodiment, the voltage detection system may be a signal, and the switch channel in the signal may be connected to a load, for example, to a signal lamp.
By adopting the voltage detection system provided by the embodiment of the application, the micro-control circuit can acquire the output voltage of the switch channel, so that the output state of the switch channel, namely whether the output state of the voltage detection system is abnormal or not, can also detect the accurate voltage value (namely the value of the output voltage) when the output state is abnormal, and further realizes the effect of accurately detecting the output voltage. In addition, under the condition that the voltage detection system comprises a plurality of switch channels, because the alternating current power supply end and the micro control circuit are respectively connected with each switch channel, the micro control circuit can collect the output voltage of each switch channel, so that the output state of each switch channel and the accurate voltage value when the output state is abnormal are detected, the voltage detection of different switch channels is not affected, and the rapid and accurate detection effect on the voltage values of multiple output channels is realized.
In one embodiment, as shown in fig. 2, the switching channel 30 includes an optocoupler isolation driving circuit 31, a switching circuit 32, and a bias voltage dividing circuit 33 connected in sequence; the optocoupler isolation driving circuit 31 and the bias voltage dividing circuit 33 are connected with the micro control circuit 20; the switching circuit 32 is connected to the ac power supply terminal 10. Wherein:
the micro control circuit 20 is configured to send a switch control instruction to the optocoupler isolation driving circuit 31.
The optocoupler isolation driving circuit 31 is configured to receive a switch control instruction, and drive the switch circuit 32 to perform a switching action according to the switch control instruction. The optocoupler isolation driving circuit 31 may be a zero-crossing optocoupler to drive the switching circuit 32 to perform switching actions at zero crossings of the ac power.
The bias voltage dividing circuit 33 is configured to divide the first voltage output by the switching circuit 32 and generate a dc bias to obtain an output voltage of the switching channel 30.
Optionally, as shown in fig. 2, the switching channel 30 further includes a voltage differential amplifying circuit 34; the voltage differential amplifying circuit 34 is connected between the bias voltage dividing circuit 33 and the micro control circuit 20. The bias voltage dividing circuit 33 outputs the divided second voltage to the voltage differential amplifying circuit 34. The voltage differential amplifying circuit 34 is configured to reduce the second voltage in equal proportion to obtain an output voltage of the switching channel 30, and the output voltage is output in a voltage waveform form through the ADC port of the micro control circuit 20.
Fig. 3 is a schematic circuit diagram of a voltage detection system according to an embodiment of the present application, as shown in fig. 3, the micro control circuit is an MCU (Micro Control Unit ) circuit, and the optocoupler isolation driving circuit 31 includes an optocoupler isolator OP1, a current limiting resistor R1, and a driving switch Q2; the current limiting resistor R1 and the driving switch Q2 are respectively connected between the alternating current power supply end 10 and the optocoupler isolator OP1, and the driving switch Q2 is grounded. The CTRL signal is connected to the control port of the MCU circuit, VCC_5V is the secondary side power supply 5V, L_WORK is the mains power fire wire input, and L_WORK is also named reference ground HGND. L_out is the live output of the switching channel, N is the neutral of the mains supply and vp_3v3 is the supply 3.3V on the primary side. The hot output l_out is accessible to a load, such as a signal lamp.
The switch circuit 32 includes a thyristor Q1 (e.g., a bidirectional thyristor), a first resistor R2, a second resistor R6, a varistor RV1, and an absorbing resistor RC1 for the off spike voltage of the thyristor Q1; one end of the first resistor R2 is connected to the opto-isolator OP1, and the other end of the first resistor R2 is connected to the silicon controlled device Q1; one end of the second resistor R6 is connected between the optocoupler isolator OP1 and the silicon controlled device Q1, and the other end of the second resistor R6 is connected to the live wire output end L_OUT of the switch channel; the piezoresistor RV1 and the absorption capacity component RC1 are respectively connected with the silicon controlled device Q1 in parallel.
The bias voltage dividing circuit 33 includes a first diode D3 and a third resistor R9 connected to each other; the positive pole of the first diode D3 is connected to the zero line N, and the negative pole of the first diode D3 is connected between the second resistor R6 and the live wire output end L_OUT of the switch channel through the third resistor R9.
The voltage differential amplifying circuit 34 includes an operational amplifier U1, a first amplifying resistor R4, a second amplifying resistor R5, a third amplifying resistor R3, a first low-frequency filter capacitor C1, a second low-frequency filter capacitor C2, a second diode D1, a third diode D2, and a bias resistor R7; the positive electrode of the second diode D1 is connected to the zero line N, and the negative electrode of the second diode D1 is connected to the positive input end of the operational amplifier U1 through the first amplifying resistor R4; the anode of the third diode D2 is connected to the live wire output end L_OUT of the switch channel, and the cathode of the third diode D2 is connected to the negative input end of the operational amplifier U1 through a second amplifying resistor R5; the output end of the operational amplifier U1 is grounded through a bias resistor R7; one end of the third amplifying resistor R3 is connected with the first resistor R2, the other end of the third amplifying resistor R3 is connected between the first amplifying resistor R4 and the positive input end of the operational amplifier U1, and the first low-frequency filter capacitor C1 is connected in parallel with the two ends of the third amplifying resistor R3; the second low-frequency filter capacitor C2 and the fourth amplifying resistor R8 are connected in parallel between the negative input terminal and the output terminal of the operational amplifier U1. VO1 is the output voltage of the op-amp U1, which is transmitted to the ADC port of the MCU circuit.
In the voltage detection system shown in fig. 3, l_workk is also referred to as ground HGND, and the switch circuit 32 is connected to the ground HGND. The l_out1 line is also the fire wire output. The input voltage (i.e., N line) of the bias voltage dividing circuit 33 is a sine wave voltage with respect to the reference ground HGND.
The operation principle of the voltage detection system is described in detail below based on the voltage detection system shown in fig. 3. For convenience of explanation, the voltage detection principle of the 1 st switching channel 30 among the plurality of switching channels 30 will be described, and the voltage detection principle of each switching channel 30 is the same.
In the case where the switch control command is to control the switching state of the switching channel 30 to be an off state, that is, the CTRL signal is at a low level, the optocoupler isolator OP1 and the thyristor Q1 are not turned on, and thus the optocoupler isolator driving circuit 31 and the switching circuit 32 are not turned on. If the live output terminal l_out1 is turned on with reference to the ground HGND, the output state of the switching channel 30 is determined to be a leakage state. The method comprises the following steps:
For the currently detected switching channel 30, first, a case where no other live line is externally leaked to the l_out1 line of the switching channel 30 will be described. When the N-line voltage is a sine wave positive half cycle, the first diode D3 is turned on, the current flows through the third resistor R9, and the second diode D1, the first amplifying resistor R4, and the third amplifying resistor R3 are divided until the reference ground HGND, the resistance value of the third resistor R9 and the first amplifying resistor R4, and the third amplifying resistor R3 is generally much smaller than the resistance value of the third resistor R9, and a small voltage difference is formed between the N-line and the l_out1 line, and the voltage difference is generally smaller than a sine voltage waveform of 5V, and the voltage difference is output after being reduced by the voltage difference amplifying circuit 34 in an equal proportion, and the voltage value of the output VO1 is also smaller, and is generally smaller than 0.1V. When the N-line voltage is a sine wave negative half cycle, the first diode D3 is turned off, the second diode D1 is turned off, the third diode D2 is turned off, and the output voltage VO1 of the voltage differential amplifying circuit 34 is 0V.
Taking the continuous positive half cycle and the continuous negative half cycle of the sine wave as one cycle, the MCU circuit continuously detects the waveform of VO1 in each cycle, and calculates a plurality of cycles to obtain an effective value of the output voltage of the switching channel 30, where the effective value is relatively small, and is generally less than 5V. The MCU circuit determines that the switching state of the 1 st switching channel 30 is the off state according to the current switching control instruction, and further determines that the output state of the 1 st switching channel 30 is normal.
Then, it is explained that the l_out1 line (i.e., the l_outn line of the nth switch channel) of the other on switch channels 30 is aged due to the broken skin or the insulating skin, and the l_out1 line is aged due to the broken skin or the insulating skin. Since both the l_outn and l_out1 lines of the other switched-on switching channels 30 are aged, leakage of the l_out1 line to the l_out1 line of the 1 st switching channel 30 results. And since all the switching channels 30 are connected to the l_workk line, the l_outn of the on switching channel 30 is also connected to the l_workk line, so that l_out1 is leaked, that is, the l_out1 line to the l_workk line form a path.
When the N-line voltage is a sine wave negative half cycle, the voltage value output by the output terminal VO1 is 0V because the first diode D3 is turned off, the second diode D1 is turned off, and the third diode D2 is turned off. When the N-line voltage is a sine wave positive half cycle, the first diode D3 is turned on, the current flows through the third resistor R9, the l_out1 line from the l_out1 line to the other turned-on switching channels 30 leaks back to the reference ground HGND (i.e., the l_work line), the voltage between the N-line and the LOUT1 is the leaked voltage (simply referred to as the leaked voltage), the value of the leaked voltage is usually larger, generally more than 90V, the leaked voltage is output after being reduced in equal proportion by the voltage differential amplifying circuit 34, the voltage waveform amplitude of the output VO1 is also larger, generally more than 1V, and in each cycle of the voltage waveform of the output VO1, the half cycle is a sine wave, and the half cycle is 0V. The MCU circuit continuously detects the voltage waveform of the output VO1, and calculates a plurality of periods, thereby obtaining an effective value of the output voltage of the 1 st switching channel 30, which is relatively large. It can be seen that the MCU circuit can calculate the effective value of the output voltage accurately leaked to the 1 st switching channel 30 by the l_outn line of the other switching channels 30 that are turned on. The MCU circuit determines that the switch state of the 1 st switch channel 30 is the off state according to the current switch control instruction, and further determines that the output state of the 1 st switch channel 30 is the leakage state, namely the output state is abnormal.
After the MCU circuit detects that the output state is the leakage state, the leakage state can be reported, including reporting at least one of leakage voltage, leakage degree and leakage voltage source. The leakage degree can be determined according to the value of the leakage voltage. Optionally, the MCU circuit can report the above-mentioned information to the host computer management system, has preset the electric leakage threshold value in the host computer management system, can carry out the level classification to the electric leakage degree according to the electric leakage threshold value of predetermineeing, and then give maintainer with corresponding early warning information according to electric leakage degree or electric leakage level to make maintainer fix a position specific circuit problem fast, overhaul fast, improve maintenance efficiency, reduce maintenance work load.
For example, when the output voltage is less than a first preset threshold (e.g., 50V), it may be determined that the output state is normal. When the output voltage is greater than or equal to a first preset threshold (such as 50V) and less than a second preset threshold (such as 80V), the leakage degree can be determined to be lower, the leakage voltage is caused by the cable of the current switch channel is broken, a small amount of water and high-impedance impurities exist between the broken cables, and in this case, maintenance staff can maintain according to prompt information when the cable is free. When the output voltage is greater than or equal to a second preset threshold (such as 80V) and less than a third preset threshold (such as 175V), the leakage degree can be determined to be higher, the leakage voltage is caused by the cable of the current switch channel is broken, water and low-impedance impurities exist between the broken cables, and in this case, a maintainer can immediately maintain according to the prompt information. When the output voltage is greater than or equal to a third preset threshold (such as 175V), the leakage degree can be determined to be very high, the leakage voltage is generated by the fact that the cable of the current switch channel is broken, and is caused by the leakage of the broken cable of other switch channels, direct contact exists between the broken cables, and a direct connection condition exists between the wires, and in this case, maintenance staff can immediately maintain according to prompt information.
In the case where the switch control command is to control the switching state of the switching channel 30 to be the closed state, that is, the CTRL signal is at a high level, the optocoupler isolator OP1 and the thyristor Q1 are turned on, and thus the optocoupler isolation driving circuit 31 and the switching circuit 32 are turned on. After the thyristor Q1 is turned on, the connection between l_workk and l_out1 is established, and the N line is a sine wave voltage with respect to the reference ground HGND. When the N-line voltage is a sine wave negative half cycle, VO1 outputs OV because the first diode D3 diode is turned off, the second diode D1 is turned off, and the second diode D2 is turned off. When the voltage of the N line is the positive half cycle of the sine wave, the first diode D3 is conducted, the current returns to the reference ground HGND through the first diode D3 and the third resistor R9 to the L_WORK line, the voltage between the N line and the L_OUT1 is the output voltage of the switch channel, the output voltage of the switch channel is generally larger and is generally more than 176V, the output voltage of the switch channel is output after being reduced in equal proportion by the voltage differential amplifying circuit, and the amplitude of the voltage waveform of the output VO1 is also larger and is generally more than 2V. In each cycle of the voltage waveform of the output VO1, half cycle is a sine wave, and half cycle is 0V. The MCU circuit continuously detects the voltage waveform of the output VO1 and calculates a plurality of periods, so as to obtain an effective value of the output voltage of the 1 st switching channel 30, where the effective value is relatively large. The MCU determines that the switch state of the 1 st switch channel 30 is the closed state according to the current switch control instruction, and further determines that the output state of the 1 st switch channel 30 is normal.
Therefore, in the embodiment of the application, the MCU circuit can determine whether the output state of each switch channel is abnormal or not through calculation, and detect accurate leakage voltage. And, according to the leakage voltage detected, the MCU circuit can determine whether the leakage voltage is generated by the resistance-capacitance element of the switch channel or caused by the live wire leakage of other switch channels, thereby defining the source of the leakage voltage. In general, the leakage voltage generated by the resistive-capacitive element of the switching channel itself is small, typically below 50V. The leakage voltage generated by the live wire leakage of other switch channels is larger, and is generally more than 90V. Therefore, the source of the leakage voltage can be rapidly determined according to the detected value of the leakage voltage, and maintenance personnel can conveniently and rapidly take maintenance measures.
The micro control circuit can collect the output voltage of the switch channel, so that the output state of the switch channel, namely whether the output state of the voltage detection system is abnormal, can be detected, and the accurate voltage value (namely the value of the output voltage) when the output state is abnormal can be detected, thereby realizing the effect of accurately detecting the output voltage. In addition, under the condition that the voltage detection system comprises a plurality of switch channels, because the alternating current power supply end and the micro control circuit are respectively connected with each switch channel, the micro control circuit can collect the output voltage of each switch channel, so that the output state of each switch channel and the accurate voltage value when the output state is abnormal are detected, the voltage detection of different switch channels is not affected, and the rapid and accurate detection effect on the voltage values of multiple output channels is realized.
Fig. 4 is a schematic flow chart of a voltage detection method according to an embodiment of the present application, where the voltage detection method is applied to the voltage detection system shown in any one of fig. 1 to 3, and the voltage detection method includes the following steps:
S402, generating a switch control instruction.
S404, a switch control instruction is sent to the switch channel to control the switch state of the switch channel; the switch state includes a closed state or an open state.
Wherein the switch control instructions may include: an instruction to control the switching state of the switching channel to be an open state, or an instruction to control the switching state of the switching channel to be a closed state.
S406, detecting the output voltage of the switch channel.
S408, determining whether the output state of the switch channel is abnormal according to the output voltage and the switch control instruction.
By adopting the technical scheme provided by the embodiment of the application, the micro-control circuit can acquire the output voltage of the switch channel, so that the output state of the switch channel, namely whether the output state of the voltage detection system is abnormal or not, can also detect the accurate voltage value (namely the value of the output voltage) when the output state is abnormal, and further realizes the effect of accurately detecting the output voltage. In addition, under the condition that the voltage detection system comprises a plurality of switch channels, because the alternating current power supply end and the micro control circuit are respectively connected with each switch channel, the micro control circuit can collect the output voltage of each switch channel, so that the output state of each switch channel and the accurate voltage value when the output state is abnormal are detected, the voltage detection of different switch channels is not affected, and the rapid and accurate detection effect on the voltage values of multiple output channels is realized.
In one embodiment, the switch control command is a command to control the switch state to be an off state. When determining whether the output state of the switch channel is abnormal according to the output voltage and the switch control instruction, if the output voltage is smaller than a first preset threshold value, determining that the output state of the switch channel is normal according to the switch control instruction. If the output voltage is greater than a second preset threshold value, determining that the output state of the switch channel is a leakage state according to the switch control instruction; the second preset threshold is greater than the first preset threshold.
In one embodiment, the switch control command is a command to control the switch state to be a closed state. When determining whether the output state of the switch channel is abnormal according to the output voltage and the switch control instruction, if the output voltage is greater than a third preset threshold value, determining that the output state of the switch channel is normal according to the switch control instruction.
In one embodiment, in the case that the output state of the switching channel is determined to be the leakage state, the output voltage is determined to be the leakage voltage, and the leakage degree of the switching channel and/or the source of the leakage voltage are determined according to the leakage voltage. And executing corresponding leakage feedback measures according to the leakage degree and/or the source of the leakage voltage.
Optionally, if the leakage voltage is less than the first leakage threshold, determining that the source of the leakage voltage is the leakage voltage generated by the switching channel itself. If the leakage voltage is greater than the second leakage threshold, determining that the source of the leakage voltage is the leakage voltage generated by other switch channels.
In this embodiment, by determining the leakage degree and/or the source of the leakage voltage of the switch channel and executing the corresponding leakage feedback measures according to the leakage degree and/or the source of the leakage voltage, for example, reporting to the host computer management system, the host computer management system sends corresponding prompt information to the maintenance personnel, so that the maintenance personnel can quickly locate a specific line problem, quickly overhaul, improve the maintenance efficiency, and reduce the maintenance workload.
In summary, particular embodiments of the present subject matter have been described. Other embodiments are within the scope of the following claims. In some cases, the actions recited in the claims can be performed in a different order and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may be advantageous.
The voltage detection system and the voltage detection method provided by the embodiment of the application are based on the same thought, and the embodiment of the application also provides a voltage detection device.
Fig. 5 is a schematic block diagram of a voltage detection apparatus according to an embodiment of the present application, as shown in fig. 5, which is applied to a voltage detection system as shown in any one of fig. 1 to 3, including:
a generating module 51, configured to generate a switch control instruction;
The control module 52 is configured to send a switch control instruction to the switch channel, so as to control a switch state of the switch channel; the switch state comprises a closed state or an open state;
a detection module 53 for detecting an output voltage of the switching channel;
A determining module 54, configured to determine whether the output state of the switching channel is abnormal according to the output voltage and the switching control instruction.
In one embodiment, the switch control instructions include: controlling the switch state to be an off state;
The determining module 54 performs the following steps when determining whether the output state of the switching channel is abnormal according to the output voltage and the switching control command:
if the output voltage is smaller than a first preset threshold value, determining that the output state of the switch channel is normal according to the switch control instruction;
If the output voltage is greater than a second preset threshold value, determining that the output state of the switch channel is a leakage state according to the switch control instruction; the second preset threshold is greater than the first preset threshold.
In one embodiment, the switch control instructions include: controlling the switch state to be a closed state;
The determining module 54 performs the following steps when determining whether the output state of the switching channel is abnormal according to the output voltage and the switching control command:
If the output voltage is greater than a third preset threshold value, determining that the output state of the switch channel is normal according to the switch control instruction.
In one embodiment, the apparatus further comprises:
The second determining module is used for determining the output voltage to be the leakage voltage under the condition that the output state of the switch channel is determined to be the leakage state, and determining the leakage degree of the switch channel and/or the source of the leakage voltage according to the leakage voltage;
and the execution module is used for executing corresponding leakage feedback measures according to the leakage degree and/or the source of the leakage voltage.
In one embodiment, the second determining module, when determining the leakage degree of the switch channel and/or the source of the leakage voltage according to the leakage voltage, performs the following steps:
if the leakage voltage is smaller than a first leakage threshold value, determining that the source of the leakage voltage is the leakage voltage generated by the switch channel;
and if the leakage voltage is larger than a second leakage threshold value, determining that the source of the leakage voltage is the leakage voltage generated by the other switch channels.
It should be understood by those skilled in the art that the voltage detection apparatus of fig. 5 can be used to implement the voltage detection method described above, and the detailed description thereof should be similar to that of the method described above, so as to avoid complexity and avoid redundancy.
Based on the same thought, the embodiment of the application also provides electronic equipment, as shown in fig. 6. The electronic device may vary considerably in configuration or performance and may include one or more processors 601 and memory 602, where the memory 602 may store one or more stored applications or data. Wherein the memory 602 may be transient storage or persistent storage. The application programs stored in the memory 602 may include one or more modules (not shown), each of which may include a series of computer-executable instructions for use in an electronic device. Still further, the processor 601 may be arranged to communicate with the memory 602 and execute a series of computer executable instructions in the memory 602 on an electronic device. The electronic device may also include one or more power supplies 603, one or more wired or wireless network interfaces 604, one or more input/output interfaces 605, and one or more keyboards 606.
In particular, in this embodiment, an electronic device includes a memory, and one or more programs, where the one or more programs are stored in the memory, and the one or more programs may include one or more modules, and each module may include a series of computer-executable instructions for the electronic device, and the one or more programs configured to be executed by one or more processors include instructions for:
Generating a switch control instruction;
sending a switch control instruction to the switch channel to control the switch state of the switch channel; the switch state comprises a closed state or an open state;
Detecting an output voltage of the switching channel;
And determining whether the switch channel is in a leakage state according to the output voltage and the switch control instruction.
By adopting the technical scheme provided by the embodiment of the application, the micro-control circuit can acquire the output voltage of the switch channel, so that the output state of the switch channel, namely whether the output state of the voltage detection system is abnormal or not, can also detect the accurate voltage value (namely the value of the output voltage) when the output state is abnormal, and further realizes the effect of accurately detecting the output voltage. In addition, under the condition that the voltage detection system comprises a plurality of switch channels, because the alternating current power supply end and the micro control circuit are respectively connected with each switch channel, the micro control circuit can collect the output voltage of each switch channel, so that the output state of each switch channel and the accurate voltage value when the output state is abnormal are detected, the voltage detection of different switch channels is not affected, and the rapid and accurate detection effect on the voltage values of multiple output channels is realized.
The embodiments of the present application also provide a computer-readable storage medium storing one or more computer programs, the one or more computer programs including instructions, which when executed by an electronic device including a plurality of application programs, enable the electronic device to perform the respective processes of the above-described voltage detection method embodiments, and are specifically configured to perform:
Generating a switch control instruction;
sending a switch control instruction to the switch channel to control the switch state of the switch channel; the switch state comprises a closed state or an open state;
Detecting an output voltage of the switching channel;
And determining whether the switch channel is in a leakage state according to the output voltage and the switch control instruction.
By adopting the technical scheme provided by the embodiment of the application, the micro-control circuit can acquire the output voltage of the switch channel, so that the output state of the switch channel, namely whether the output state of the voltage detection system is abnormal or not, can also detect the accurate voltage value (namely the value of the output voltage) when the output state is abnormal, and further realizes the effect of accurately detecting the output voltage. In addition, under the condition that the voltage detection system comprises a plurality of switch channels, because the alternating current power supply end and the micro control circuit are respectively connected with each switch channel, the micro control circuit can collect the output voltage of each switch channel, so that the output state of each switch channel and the accurate voltage value when the output state is abnormal are detected, the voltage detection of different switch channels is not affected, and the rapid and accurate detection effect on the voltage values of multiple output channels is realized.
The system, apparatus, module or unit set forth in the above embodiments may be implemented in particular by a computer chip or entity, or by a product having a certain function. One typical implementation is a computer. In particular, the computer may be, for example, a personal computer, a laptop computer, a cellular telephone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
For convenience of description, the above devices are described as being functionally divided into various units, respectively. Of course, the functions of each element may be implemented in the same piece or pieces of software and/or hardware when implementing the present application.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of computer-readable media.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
The embodiments of the present application are described in a progressive manner, and the same and similar parts of the embodiments are all referred to each other, and each embodiment is mainly described in the differences from the other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (12)
1. The voltage detection system is characterized by comprising an alternating current power supply end, a micro control circuit and at least one switch channel, wherein the micro control circuit and the at least one switch channel are sequentially connected;
The alternating current power supply end is respectively connected with the micro control circuit and the switch channel and is used for providing alternating current for the micro control circuit and the switch channel;
the micro control circuit is used for sending a switch control instruction to the switch channel, and the switch control instruction is used for controlling the switch state of the switch channel; the switch state comprises a closed state or an open state;
The switch channel is used for executing switch actions according to the switch control instruction;
The micro control circuit is also used for detecting the output voltage of the switch channel and determining whether the output state of the switch channel is abnormal or not according to the output voltage.
2. The system of claim 1, wherein the switching channel comprises an optocoupler isolation drive circuit, a switching circuit, and a bias voltage divider circuit connected in sequence; the optocoupler isolation driving circuit and the bias voltage dividing circuit are connected with the micro control circuit; the switch circuit is connected with the alternating current power supply end;
the micro control circuit is used for sending the switch control instruction to the optocoupler isolation driving circuit;
The optocoupler isolation driving circuit is used for receiving the switch control instruction and driving the switch circuit to execute switch action according to the switch control instruction;
The bias voltage dividing circuit is used for dividing the first voltage output by the switching circuit and generating direct current bias to obtain the output voltage of the switching channel.
3. The system of claim 2, wherein the switching channel further comprises a voltage differential amplification circuit; the voltage differential amplifying circuit is connected between the bias voltage dividing circuit and the micro control circuit;
the bias voltage dividing circuit is used for outputting the second voltage obtained after voltage division to the voltage differential amplifying circuit;
and the voltage differential amplifying circuit is used for carrying out equal proportion reduction on the second voltage to obtain the output voltage of the switch channel.
4. The system of claim 3, wherein the optocoupler isolation drive circuit comprises an optocoupler isolator, a current limiting resistor, and a drive switch; the current limiting resistor and the driving switch are respectively connected between the alternating current power supply end and the optocoupler isolator, and the driving switch is grounded;
The switch circuit comprises a silicon controlled device, a first resistor, a second resistor, a piezoresistor and an absorption resistance-capacitance element; one end of the first resistor is connected to the optocoupler isolator, and the other end of the first resistor is connected to the silicon controlled device; one end of the second resistor is connected between the optocoupler isolator and the silicon controlled device, and the other end of the second resistor is connected to the live wire output end of the switch channel; the piezoresistor and the absorption capacity component are respectively connected with the silicon controlled device in parallel;
The bias voltage division circuit comprises a first diode and a third resistor which are connected with each other; the positive electrode of the first diode is connected to a zero line, and the negative electrode of the first diode is connected between the second resistor and the live wire output end of the switch channel through the third resistor;
The voltage differential amplifying circuit comprises an operational amplifier, a first amplifying resistor, a second amplifying resistor, a third amplifying resistor, a first low-frequency filter capacitor, a second diode, a third diode and a bias resistor; the positive electrode of the second diode is connected to the zero line, and the negative electrode of the second diode is connected to the positive input end of the operational amplifier through the first amplifying resistor; the anode of the third diode is connected to the live wire output end of the switch channel, and the cathode of the third diode is connected to the negative input end of the operational amplifier through the second amplifying resistor; the output end of the operational amplifier is grounded through the bias resistor; one end of the third amplifying resistor is connected with the first resistor, the other end of the third amplifying resistor is connected between the first amplifying resistor and the positive input end of the operational amplifier, and the first low-frequency filter capacitor is connected in parallel with the two ends of the third amplifying resistor; the second low-frequency filter capacitor and the fourth amplifying resistor are connected in parallel between the negative input end and the output end of the operational amplifier.
5. The system of claim 2, wherein the switching circuit is connected to a reference ground; the input voltage of the bias voltage dividing circuit is sine wave voltage;
Under the condition that the switch control instruction controls the switch state to be in an off state, the optocoupler isolation driving circuit and the switch circuit are not conducted; and if the live wire output end of the switch channel is conducted with the reference ground, determining that the output state of the switch channel is a leakage state.
6. A voltage detection method, characterized by being applied to the voltage detection system according to any one of claims 1 to 5, the method comprising:
Generating a switch control instruction;
sending a switch control instruction to the switch channel to control the switch state of the switch channel; the switch state comprises a closed state or an open state;
Detecting an output voltage of the switching channel;
and determining whether the output state of the switch channel is abnormal according to the output voltage and the switch control instruction.
7. The method of claim 6, wherein the switch control instruction comprises: controlling the switch state to be an off state;
the determining whether the output state of the switch channel is abnormal according to the output voltage and the switch control instruction comprises the following steps:
if the output voltage is smaller than a first preset threshold value, determining that the output state of the switch channel is normal according to the switch control instruction;
If the output voltage is greater than a second preset threshold value, determining that the output state of the switch channel is a leakage state according to the switch control instruction; the second preset threshold is greater than the first preset threshold.
8. The method of claim 6, wherein the switch control instruction comprises: controlling the switch state to be a closed state;
the determining whether the output state of the switch channel is abnormal according to the output voltage and the switch control instruction comprises the following steps:
If the output voltage is greater than a third preset threshold value, determining that the output state of the switch channel is normal according to the switch control instruction.
9. The method of claim 6, wherein the method further comprises:
under the condition that the output state of the switch channel is determined to be the leakage state, determining the output voltage to be the leakage voltage, and determining the leakage degree of the switch channel and/or the source of the leakage voltage according to the leakage voltage;
And executing corresponding leakage feedback measures according to the leakage degree and/or the source of the leakage voltage.
10. The method according to claim 9, wherein said determining the extent of leakage of the switching channel and/or the source of the leakage voltage from the leakage voltage comprises:
if the leakage voltage is smaller than a first leakage threshold value, determining that the source of the leakage voltage is the leakage voltage generated by the switch channel;
and if the leakage voltage is larger than a second leakage threshold value, determining that the source of the leakage voltage is the leakage voltage generated by the other switch channels.
11. A voltage detection device, characterized in that it is applied to the voltage detection system according to any one of claims 1 to 5, the device comprising:
The generating module is used for generating a switch control instruction;
The control module is used for sending a switch control instruction to the switch channel so as to control the switch state of the switch channel; the switch state comprises a closed state or an open state;
The detection module is used for detecting the output voltage of the switch channel;
and the determining module is used for determining whether the output state of the switch channel is abnormal according to the output voltage and the switch control instruction.
12. An electronic device comprising a processor and a memory electrically connected to the processor, the memory storing a computer program, the processor being configured to invoke and execute the computer program from the memory to implement the voltage detection method of any of claims 6-10.
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