Radio frequency electromagnetic signal monitoring device and method for measuring equipment

Abstract

The invention provides a radio frequency electromagnetic signal monitoring device and a radio frequency electromagnetic signal monitoring method for measuring equipment, which are used for sampling and recording interference signals and giving an alarm when electromagnetic signal interference occurs around the measuring equipment. The device comprises a monitoring circuit which is used for receiving electromagnetic wave signals around measurement equipment in real time and judging whether the electromagnetic wave signals are interference signals or not, if the electromagnetic wave signals are the interference signals, the monitoring circuit samples the interference signals and outputs the interference signals, and the monitoring circuit outputs IO switch disconnection signals and alarm audio alarm signals; the memory is connected with the monitoring circuit and is used for receiving and storing the interference signal output by the monitoring circuit; the IO switch is connected with the monitoring circuit and used for receiving the IO switch disconnection signal and disconnecting the IO switch; the alarm audio is connected with the monitoring circuit and used for receiving the alarm audio signal and playing the alarm audio; and the power supply is used for supplying power to the monitoring device.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of radio frequency electromagnetic signal monitoring, in particular to a radio frequency electromagnetic signal monitoring device and method for a measuring device. BACKGROUND

[0002] In recent years, with the acceleration of the construction of smart grid in China, measuring devices are gradually widely used in new power systems. Measuring devices usually integrate a large number of digital and analog circuits for real-time monitoring and accurate measurement of power systems. However, under the interference of strong electromagnetic signals, measuring devices often face various performance problems, which seriously affect their normal work. Common influences include communication interruption, data display failure, measurement result inaccuracy, etc. of measuring devices. Even when the electromagnetic interference intensity exceeds a certain range, the device may stop working or be permanently damaged.

[0003] In addition, most of the measuring devices in the current technology lack efficient electromagnetic interference detection and self-repair mechanisms. Once the device is subjected to electromagnetic interference, it often cannot identify and record the interference event in real time, resulting in the inability to take appropriate measures in a timely manner. This design without timely response makes the device prone to persistent failure when encountering electromagnetic interference, and may even cause long-term undetectable device damage problems, thereby affecting the stable operation of the entire power system.

[0004] Therefore, in view of the problems of performance inaccuracy of measuring devices, inability to discover device failure in a timely manner, and lack of effective traceability mechanism when the existing technology deals with strong electromagnetic interference, the present application provides a radio frequency electromagnetic signal monitoring device and method for a measuring device. SUMMARY

[0005] The embodiments of the present application provide a radio frequency electromagnetic signal monitoring device and method for a measuring device to achieve sampling and recording of interference signals and alarm when electromagnetic signal interference occurs around the measuring device.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] In a first aspect, the present application provides a radio frequency electromagnetic signal monitoring device for a measuring device, which comprises: a monitoring circuit, a memory, an IO switch, a power supply, and an alarm audio;

[0008] The monitoring circuit is used to receive electromagnetic wave signals around the measuring device in real time, and to determine whether the electromagnetic wave signals are interference signals. If the electromagnetic wave signals are interference signals, the monitoring circuit samples the interference signals and outputs an interference warning signal. The monitoring circuit also outputs an IO switch off signal and an alarm audio alarm signal.

[0009] A memory is connected with the monitoring circuit and used to store the sampled interference signal of the monitoring circuit.

[0010] An IO switch is connected with the monitoring circuit and used to receive the IO switch off signal and turn off the IO switch.

[0011] An alarm audio is connected with the monitoring circuit and used to receive the alarm audio alarm signal and play the alarm audio.

[0012] A power supply is used to power the monitoring device.

[0013] In a possible design, the device of the first aspect further includes that the monitoring circuit includes an antenna, a radio frequency detector, a peak holding circuit, an analog comparator and a single-chip microcomputer.

[0014] The antenna is used to receive the electromagnetic wave signal around the measuring device in real time, convert the electromagnetic signal into a voltage signal and transmit the voltage signal to the radio frequency detector.

[0015] The radio frequency detector is connected with the antenna and used to receive the voltage signal, extract the low-frequency envelope signal of the voltage signal and transmit the low-frequency envelope signal to the peak holding circuit.

[0016] The peak holding circuit is connected with the radio frequency detector and used to receive the low-frequency envelope signal, process the low-frequency envelope signal to obtain a processed low-frequency envelope signal and output the processed low-frequency envelope signal to the analog comparator.

[0017] The analog comparator is connected with the peak holding circuit and the single-chip microcomputer and used to receive the processed low-frequency envelope signal, compare the processed low-frequency envelope signal with a reference level and output a digital high level to the single-chip microcomputer if the processed low-frequency envelope signal is greater than the reference level, wherein the reference level is preset by the single-chip microcomputer and transmitted to the analog comparator.

[0018] The single-chip microcomputer is used to receive the digital high level, determine that the electromagnetic wave signal is an interference signal based on the digital high level, sample the interference signal and output an interference early warning signal, and output the IO switch off signal and the alarm audio alarm signal.

[0019] In a possible design, the device of the first aspect further includes that the single-chip microcomputer includes a PRD counter and is used to set the monitoring device to perform periodic monitoring.

[0020] In a possible design, the device of the first aspect further includes that the single-chip microcomputer includes an ADC module and a DAC module.

[0021] The ADC module is used to sample the interference signal.

[0022] The DAC module is used to preset the reference level and transmit the reference level to the analog comparator.

[0023] In a second aspect, the application provides a radio frequency electromagnetic signal monitoring method for a metrology device, the method comprising: S101, powering the monitoring device;

[0024] S102, the monitoring circuit receives electromagnetic wave signals around the metrology device in real time, and determines whether the electromagnetic wave signals are interference signals; if the electromagnetic wave signals are interference signals, the monitoring circuit samples the interference signals and outputs an interference warning signal, and the monitoring circuit outputs an IO switch off signal and an alarm audio alarm signal;

[0025] S103, the memory stores the interference signals sampled by the monitoring circuit;

[0026] S104, the IO switch receives the IO switch off signal and turns off the IO switch;

[0027] S105, the alarm audio receives the alarm audio alarm signal and plays the alarm audio.

[0028] In a possible design, the method of the second aspect further comprises that the monitoring circuit comprises an antenna, a radio frequency detector, a peak holding circuit, an analog comparator and a single-chip microcomputer, and step S102 comprises:

[0029] S201, the single-chip microcomputer initializes the monitoring circuit, and the peak holding circuit is set to a PHK mode;

[0030] S202, the antenna receives electromagnetic wave signals in real time, converts the electromagnetic signals into voltage signals, and transmits the voltage signals to the radio frequency detector;

[0031] S203, the radio frequency detector receives the voltage signals, extracts low-frequency envelope signals of the voltage signals, and transmits the low-frequency envelope signals to the peak holding circuit;

[0032] S204, the peak holding circuit receives the low-frequency envelope signals, processes the low-frequency envelope signals, obtains a maximum value of the low-frequency envelope signals, and outputs the maximum value of the low-frequency envelope signals to the analog comparator;

[0033] S205, the analog comparator receives the maximum value of the low-frequency envelope signals, compares the maximum value of the low-frequency envelope signals with a reference level, and outputs a digital high level to the single-chip microcomputer if the processed low-frequency envelope signals are greater than the reference level, wherein the reference level is preset by the single-chip microcomputer and transmitted to the analog comparator;

[0034] S206, the single-chip microcomputer receives the digital high level, determines that the electromagnetic wave signals are interference signals based on the digital high level, then samples the interference signals and outputs an interference warning signal, and outputs an IO switch off signal and an alarm audio alarm signal.

[0035] A possible design scheme, the method of the second aspect further comprises, in step S206, the single-chip microcomputer samples the interference signal and outputs the interference warning signal, comprising:

[0036] The single-chip microcomputer samples the interference signal to obtain the interference signal;

[0037] The single-chip microcomputer compares the interference signal with a preset interference threshold value, and if the value of the interference signal is greater than the preset interference threshold value, the single-chip microcomputer outputs the interference warning signal, sets the interference flag position in the single-chip microcomputer program to high level, and outputs the information that the interference flag position is high level to the memory for storage.

[0038] A possible design scheme, the method of the second aspect further comprises, in step S206, after sampling the interference signal, the method further comprises:

[0039] The single-chip microcomputer sets the peak value holding circuit to the ENV mode, and then sets the peak value holding circuit to the PHK mode when the analog comparator outputs a digital low level, wherein the peak value holding circuit directly outputs the low-frequency envelope signal to the analog comparator under the EVN mode.

[0040] A possible design scheme, the method of the second aspect further comprises that the single-chip microcomputer comprises a PRD counter, and after outputting a digital high level to the single-chip microcomputer in step S205, the method further comprises:

[0041] The single-chip microcomputer starts the PRD counter to start counting;

[0042] Correspondingly, after sampling the interference signal in step S206, it is judged whether the PRD counter overflows, if the PRD counter overflows and the analog comparator still outputs a digital high level to the single-chip microcomputer, steps S202-S206 are re-executed, if the PRD counter does not overflow and the analog comparator outputs a digital low level to the single-chip microcomputer, the PRD counter stops counting.

[0043] A possible design scheme, the method of the second aspect further comprises, in step S105, the duration of playing the alarm audio is preset by the single-chip microcomputer.

[0044] In the embodiment of the present application, by integrating the radio frequency electromagnetic signal monitoring device for the metrology equipment inside the metrology equipment, the metrology equipment can continuously and real-timely monitor the electromagnetic signals in the surrounding environment. When detecting that the amplitude of the electromagnetic signal exceeds the preset value, the monitoring device will automatically start the data collection program, sample the interference signal, and record the collected signal information in detail. The device not only helps the equipment to quickly identify the occurrence of interference events, but also provides effective basis for subsequent troubleshooting and analysis through the recorded signal data. At the same time, when the monitoring device detects that the interference intensity of the electromagnetic signal reaches the predetermined alarm standard, the system will issue a real-time alarm to ensure that the operator or system maintenance personnel can timely learn about the interference event and take timely measures to prevent equipment failure or measurement error caused by electromagnetic interference.

[0045] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0047] Figure 1 The structural schematic diagram of the radio frequency electromagnetic signal monitoring device for the metrology equipment provided in the embodiment of the present application is shown in the figure.

[0048] Figure 2 The flowchart of the radio frequency electromagnetic signal monitoring method for the metrology equipment provided in the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0051] It should be noted that similar reference numerals and letters refer to like items throughout the accompanying drawings, and once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings.

[0052] In the description of the embodiments of the present specification, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed, and are only for the convenience of describing the present specification and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present specification. In addition, the terms "first", "second", "third" and the like appear only to distinguish the description and cannot be understood as indicating or implying relative importance.

[0053] In addition, if the terms "horizontal", "vertical", "overhanging" and the like appear, they do not mean that the component must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0054] In the description of the embodiments of the present specification, it should also be noted that unless otherwise explicitly specified and limited, if the terms "arrangement", "installation", "connection", "connection" appear, they should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the present specification can be understood according to the specific circumstances.

[0055] A radio frequency electromagnetic signal monitoring device for a measurement device will be specifically introduced below. The device aims to sample and record the interference signal and alarm when electromagnetic signal interference occurs, to ensure the normal operation of the measurement device in the electromagnetic interference environment.

[0056] Figure 1 The structure diagram of the radio frequency electromagnetic signal monitoring device for a measurement device provided by the embodiments of the present application is shown.

[0057] As shown in Figure 1 The radio frequency electromagnetic signal monitoring device for a measurement device mainly includes a monitoring circuit, a memory, an IO switch, a power supply, and an alarm audio.

[0058] The monitoring circuit is configured to receive the electromagnetic wave signal around the measuring device in real time, determine whether the electromagnetic wave signal is an interference signal, sample the interference signal if the electromagnetic wave signal is the interference signal, and output an interference warning signal, an IO switch off signal and an alarm audio alarm signal.

[0059] The memory is connected to the monitoring circuit and configured to store the sampled interference signal.

[0060] The IO switch is connected to the monitoring circuit and configured to receive the IO switch off signal and turn off the IO switch.

[0061] The alarm audio is connected to the monitoring circuit and configured to receive the alarm audio alarm signal and play the alarm audio.

[0062] The power supply is configured to supply power to the monitoring device.

[0063] In an embodiment, the monitoring circuit includes an antenna, a radio frequency detector, a peak holding circuit, an analog comparator and a single-chip microcomputer.

[0064] The antenna is configured to receive the electromagnetic wave signal around the measuring device in real time, convert the electromagnetic signal into a voltage signal, and transmit the voltage signal to the radio frequency detector.

[0065] The radio frequency detector is connected to the antenna and configured to receive the voltage signal, extract a low-frequency envelope signal of the voltage signal, and transmit the low-frequency envelope signal to the peak holding circuit.

[0066] The peak holding circuit is connected to the radio frequency detector and configured to receive the low-frequency envelope signal, process the low-frequency envelope signal to obtain a processed low-frequency envelope signal, and output the processed low-frequency envelope signal to the analog comparator.

[0067] The analog comparator is connected to the peak holding circuit and the single-chip microcomputer, configured to receive the processed low-frequency envelope signal, compare the processed low-frequency envelope signal with a reference level, and output a digital high level to the single-chip microcomputer if the processed low-frequency envelope signal is greater than the reference level, wherein the reference level is preset by the single-chip microcomputer and transmitted to the analog comparator.

[0068] The single-chip microcomputer is configured to receive the digital high level, determine that the electromagnetic wave signal is the interference signal based on the digital high level, sample the interference signal, output the interference warning signal, the IO switch off signal and the alarm audio alarm signal.

[0069] It can be understood that the above-mentioned antenna can be built-in or external to the monitoring device, and the specific functions and implementations are the same.

[0070] It can be understood that the above-mentioned radio frequency detector can convert the received high-frequency radio frequency signal (i.e. voltage signal) into a corresponding low-frequency signal, i.e. the above-mentioned low-frequency envelope signal, through the built-in detection circuit of the radio frequency detector. The low-frequency envelope signal has low-frequency characteristics and can be more easily processed in subsequent circuits.

[0071] In addition, the peak holding circuit has two working modes. Working mode one (EVN mode), the peak holding circuit transmits and processes the low-frequency envelope signal, and directly outputs the low-frequency envelope signal to the analog comparator; working mode two (PHK mode), the low-frequency envelope signal is received and processed to obtain the maximum value of the low-frequency envelope signal, and the maximum value of the low-frequency envelope signal is output to the analog comparator. Different modes are selected according to actual conditions. How to select can refer to the radio frequency electromagnetic signal monitoring method for a measurement device described below, which will not be repeated here.

[0072] In an embodiment, the single-chip microcomputer includes a PRD counter for setting the monitoring device to perform periodic monitoring. How to perform periodic monitoring can also refer to the radio frequency electromagnetic signal monitoring method for a measurement device described below, which will not be repeated here.

[0073] In an embodiment, the single-chip microcomputer includes an ADC module and a DAC module; the ADC module is used for sampling the interference signal; and the DAC module is used for presetting a reference level and transmitting the reference level to the analog comparator.

[0074] In an embodiment, the IO switch is used for receiving an IO switch disconnecting signal and disconnecting the IO switch. That is, the communication and control bus (such as RS485, CAN, and USB) of the upper computer belongs to a wired connection path and may carry conductive interference (such as power surge, bus coupling transient noise, and interference of the upper computer system itself). When the device detects strong interference in the environment through the antenna, the IO switch is actively disconnected, i.e. the bus connection is disconnected, to prevent external interference from invading other circuits (such as the MCU, the memory, and the power module) inside the device through the wired path.

[0075] In an embodiment, the alarm audio is used for receiving an alarm audio alarm signal and playing the alarm audio. In addition, the playing time or the playing content of the alarm audio is controlled by the single-chip microcomputer.

[0076] In summary, in the embodiment of the present application, by integrating the radio frequency electromagnetic signal monitoring device for the metrology equipment inside the metrology equipment, the metrology equipment can continuously and real-timely monitor the electromagnetic signals in the surrounding environment. When the amplitude of the electromagnetic signal detected exceeds the preset value, the monitoring device will automatically start the data collection program, sample the interference signal, and record the collected signal information in detail. The device not only helps the equipment to quickly identify the occurrence of interference events, but also provides effective basis for subsequent troubleshooting and analysis through the recorded signal data. At the same time, when the monitoring device detects that the interference strength of the electromagnetic signal reaches the predetermined alarm standard, the system will issue a real-time alarm to ensure that the operator or system maintenance personnel can timely learn about the interference event and take timely measures to prevent equipment failure or measurement error caused by electromagnetic interference.

[0077] The above Figure 1 The radio frequency electromagnetic signal monitoring device for the metrology equipment provided in the embodiment of the present application is described in detail below. Figure 2 The radio frequency electromagnetic signal monitoring method for the metrology equipment is described below.

[0078] Figure 2 The flowchart of the radio frequency electromagnetic signal monitoring method for the metrology equipment provided in the embodiment of the present application is shown in the figure.

[0079] As Figure 2 shown, the radio frequency electromagnetic signal monitoring method for the metrology equipment mainly includes:

[0080] S101, power supply for the monitoring device.

[0081] S102, the monitoring circuit real-timely receives the electromagnetic wave signals around the metrology equipment, and judges whether the electromagnetic wave signals are interference signals. If the electromagnetic wave signals are interference signals, the monitoring circuit samples the interference signals and outputs the interference early warning signal, and the monitoring circuit outputs the IO switch opening signal and the alarm audio alarm signal.

[0082] S103, the memory stores the interference signals sampled by the monitoring circuit.

[0083] S104, the IO switch receives the IO switch opening signal and opens the IO switch.

[0084] S105, the alarm audio receives the alarm audio alarm signal and plays the alarm audio.

[0085] In the embodiment, the monitoring circuit includes an antenna, a radio frequency detector, a peak holding circuit, an analog comparator, and a single-chip microcomputer. Step S102 includes:

[0086] S201, the single-chip microcomputer initializes the monitoring circuit, and the peak holding circuit is set to a PHK mode.

[0087] S202, the antenna receives an electromagnetic wave signal in real time, converts the electromagnetic signal into a voltage signal, and transmits the voltage signal to the radio frequency detector.

[0088] S203, the radio frequency detector receives the voltage signal, extracts a low-frequency envelope signal of the voltage signal, and transmits the low-frequency envelope signal to the peak holding circuit.

[0089] That is, the radio frequency detector can convert the received high-frequency radio frequency signal (i.e., the voltage signal) into a corresponding low-frequency signal, i.e., the low-frequency envelope signal, through the built-in detection circuit, and the low-frequency envelope signal has a low-frequency characteristic and can be more easily processed in the subsequent circuit.

[0090] S204, the peak holding circuit receives the low-frequency envelope signal, processes the low-frequency envelope signal, obtains a maximum value of the low-frequency envelope signal, and outputs the maximum value of the low-frequency envelope signal to the analog comparator.

[0091] At this time, the peak holding circuit is in the PHK mode, so the low-frequency envelope signal is processed to obtain the maximum value of the low-frequency envelope signal, and the maximum value of the low-frequency envelope signal is output to the analog comparator.

[0092] S205, the analog comparator receives the maximum value of the low-frequency envelope signal, compares the maximum value of the low-frequency envelope signal with a reference level, and outputs a digital high level to the single-chip microcomputer if the processed low-frequency envelope signal is greater than the reference level.

[0093] The reference level is preset by the single-chip microcomputer and transmitted to the analog comparator.

[0094] S206, the single-chip microcomputer receives the digital high level, determines that the electromagnetic wave signal is an interference signal based on the digital high level, then samples the interference signal and outputs an interference warning signal, and outputs an IO switch-off signal and an alarm audio alarm signal.

[0095] In this embodiment, in step S206, the single-chip microcomputer samples the interference signal and outputs an interference warning signal, which includes:

[0096] The single-chip microcomputer samples the interference signal to obtain the interference signal.

[0097] The single-chip microcomputer compares the interference signal with a preset interference threshold value, and if the value of the interference signal is greater than the preset interference threshold value, the single-chip microcomputer outputs an interference warning signal, sets a disturbance flag position in the single-chip microcomputer program to a high level, and outputs information that the disturbance flag position is at a high level to the memory for storage.

[0098] In this embodiment, after the sampling of the interference signal in step S206 is completed, the method further comprises:

[0099] The single-chip microcomputer sets the peak holding circuit to the ENV mode, and then sets the peak holding circuit to the PHK mode when the analog comparator outputs a digital low level, wherein the peak holding circuit directly outputs the low-frequency envelope signal to the analog comparator under the EVN mode.

[0100] In this embodiment, the single-chip microcomputer comprises a PRD counter, and after the digital high level is output to the single-chip microcomputer in step S205, the method further comprises:

[0101] The single-chip microcomputer starts the PRD counter to start counting.

[0102] Correspondingly, after the sampling of the interference signal in step S206 is completed, it is determined whether the PRD counter overflows, if the PRD counter overflows and the analog comparator still outputs a digital high level to the single-chip microcomputer, steps S202-S206 are re-executed, if the PRD counter does not overflow and the analog comparator outputs a digital low level to the single-chip microcomputer, the PRD counter stops counting.

[0103] In this embodiment, in step S105, the duration of playing the alarm audio is preset by the single-chip microcomputer.

[0104] The above detailed description of the above-mentioned method for measuring the radio frequency electromagnetic signal of the measuring equipment comprises steps S301-S312, which are as follows:

[0105] Step S301, power supply for the monitoring device.

[0106] Step S302, the single-chip microcomputer initializes the monitoring circuit, and the peak holding circuit is set to the PHK mode.

[0107] Step S303, the antenna receives the electromagnetic wave signal in real time, converts the electromagnetic signal into a voltage signal, and transmits the voltage signal to the radio frequency detector.

[0108] Step S304, the radio frequency detector receives the voltage signal in real time, extracts the low-frequency envelope signal (RFENV) of the voltage signal, and transmits the low-frequency envelope signal (RFENV) to the peak holding circuit.

[0109] Step S305, the peak holding circuit receives the low-frequency envelope signal (RFENV) in real time, processes the low-frequency envelope signal (RFENV), obtains the maximum value (V_DET) of the low-frequency envelope signal, and outputs the maximum value (V_DET) of the low-frequency envelope signal to the analog comparator.

[0110] Step S306, the analog comparator receives the maximum value (V DET) of the low-frequency envelope signal in real time, and compares the maximum value (V DET) of the low-frequency envelope signal with the reference level (V REF), if the processed low-frequency envelope signal (V DET) is greater than the reference level (V REF), a digital high level is output (that is, V COMP is output, at this time, V COMP is a digital high level) to the single-chip microcomputer, and the single-chip microcomputer starts the PRD counter to start counting.

[0111] Step S307, the single-chip microcomputer receives the digital high level (V COMP), determines that the electromagnetic wave signal is an interference signal based on the digital high level (V COMP), samples (AD) the interference signal, and outputs an interference warning signal, an IO switch opening signal, and an alarm audio alarm signal.

[0112] It can be understood that, at this time, the single-chip microcomputer samples the interference signal to obtain the interference signal;

[0113] The single-chip microcomputer compares the interference signal with a preset interference threshold value, if the value of the interference signal is greater than the preset interference threshold value, the single-chip microcomputer outputs an interference warning signal, sets a interference flag position in the single-chip microcomputer program to a high level, and outputs information that the interference flag position is at a high level to a memory for storage.

[0114] Alternatively, the single-chip microcomputer directly identifies the interference signal without further verification, sets the interference flag position in the single-chip microcomputer program to a high level, and outputs information that the interference flag position is at a high level to a memory for storage.

[0115] In addition, the interference flag position in the single-chip microcomputer program is set to a high level (that is, DET_FLAG is set to 1), and the information that the interference flag position is at a high level is output to the memory for storage, which can also include setting the interference flag pin (DET_PIN) to a high level. Once the above DET_FLAG and DET_PIN are set, they will remain unchanged until the upper computer learns of the interference event based on this, and clears the DET_FLAG by command, and after the DET_FLAG is cleared, the DET_PIN is automatically set to low.

[0116] Step S308, after sampling the interference signal, the single-chip microcomputer sets the peak value holding circuit to the ENV mode, and then sets the peak value holding circuit to the PHK mode when the analog comparator outputs a digital low level.

[0117] Step S309, the single-chip judges whether the PRD counter overflows or not, if the PRD counter overflows and the analog comparator outputs a high digital level to the single-chip, the steps S303-S308 are re-executed, if the PRD counter does not overflow and the analog comparator outputs a low digital level to the single-chip, the PRD counter stops counting.

[0118] Step S310, the interference signal sampled in step S307 is stored by the memory.

[0119] Step S311, the IO switch off signal output in step S307 is received by the IO switch, and the IO switch is turned off.

[0120] Step S312, the alarm audio alarm signal output in step S307 is received by the alarm audio, and the alarm audio is played.

[0121] The duration of playing the alarm audio is preset by the single-chip, and the playing content of the alarm audio is also preset by the single-chip.

[0122] Those skilled in the art should understand that the above discussion of any embodiment is only exemplary and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples; under the idea of the present application, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above. In order to be brief, they are not provided in details.

[0123] The embodiments of the present application are intended to cover all such alternatives, modifications, and variations as fall within the broad scope of the appended claims. Accordingly, any and all such modifications, variations, or equivalents that fall within the spirit and scope of the present application are intended to be included within the scope of the present application.

Claims

1. A radio frequency electromagnetic signal monitoring device for measuring equipment, characterized in that, The monitoring device includes: a monitoring circuit, a memory, an I / O switch, a power supply, and an alarm audio signal; The monitoring circuit is used to receive electromagnetic wave signals around the measuring device in real time and determine whether the electromagnetic wave signal is an interference signal. If the electromagnetic wave signal is an interference signal, the monitoring circuit samples the interference signal and outputs an interference warning signal, and the monitoring circuit outputs the IO switch disconnect signal and the alarm audio alarm signal. The memory is connected to the monitoring circuit and is used to store the interference signals sampled by the monitoring circuit; The IO switch is connected to the monitoring circuit and is used to receive an IO switch disconnect signal and disconnect the IO switch. The alarm audio is connected to the monitoring circuit and is used to receive the alarm audio signal and play the alarm audio. The power source is used to supply power to the monitoring device.

2. The radio frequency electromagnetic signal monitoring device for measuring equipment according to claim 1, characterized in that, The monitoring circuit includes an antenna, a radio frequency detector, a peak hold circuit, an analog comparator, and a microcontroller. The antenna is used to receive electromagnetic wave signals around the measuring equipment in real time, convert the electromagnetic signals into voltage signals, and transmit the voltage signals to the radio frequency detector. The radio frequency detector is connected to the antenna and is used to receive the voltage signal, extract the low-frequency envelope signal of the voltage signal, and transmit the low-frequency envelope signal to the peak hold circuit. The peak hold circuit is connected to the radio frequency detector and is used to receive the low-frequency envelope signal, process the low-frequency envelope signal to obtain the processed low-frequency envelope signal, and output the processed low-frequency envelope signal to the analog comparator. The analog comparator, connected to the peak hold circuit and the microcontroller, is used to receive the processed low-frequency envelope signal and compare the processed low-frequency envelope signal with a reference level. If the processed low-frequency envelope signal is greater than the reference level, a digital high level is output to the microcontroller. The reference level is preset by the microcontroller and transmitted to the analog comparator. The microcontroller is used to receive the digital high level, determine the electromagnetic wave signal as an interference signal based on the digital high level, then sample the interference signal and output an interference warning signal, as well as output the IO switch disconnect signal and the alarm audio alarm signal.

3. The radio frequency electromagnetic signal monitoring device for measuring equipment according to claim 2, characterized in that, The microcontroller includes a PRD counter, which is used to set the monitoring device to perform periodic monitoring.

4. The radio frequency electromagnetic signal monitoring device for measuring equipment according to claim 2, characterized in that, The microcontroller includes an ADC module and a DAC module; The ADC module is used to sample the interference signal; The DAC module is used to preset the reference level and transmit it to the analog comparator.

5. A method for monitoring radio frequency electromagnetic signals in a measuring device, characterized in that, The method is applied to a radio frequency electromagnetic signal monitoring device for measurement equipment. The monitoring device includes a monitoring circuit, a memory, an I / O switch, a power supply, and an alarm audio. The method includes: S101. Power supply to the monitoring device; S102. The monitoring circuit receives electromagnetic wave signals around the measuring device in real time and determines whether the electromagnetic wave signal is an interference signal. If the electromagnetic wave signal is an interference signal, the monitoring circuit samples the interference signal and outputs an interference warning signal. The monitoring circuit also outputs the IO switch disconnect signal and the alarm audio alarm signal. S103. The memory stores the interference signal sampled by the monitoring circuit; S104. The IO switch receives the IO switch disconnect signal and disconnects the IO switch; S105. The alarm audio signal is received and the alarm audio is played.

6. The method for monitoring radio frequency electromagnetic signals in a measuring device according to claim 5, characterized in that, The monitoring circuit includes an antenna, a radio frequency detector, a peak hold circuit, an analog comparator, and a microcontroller. Step S102 includes: S201. The microcontroller initializes the monitoring circuit, and the peak hold circuit is set to PHK mode. S202. The antenna receives electromagnetic wave signals in real time, converts the electromagnetic signals into voltage signals, and transmits the voltage signals to the radio frequency detector. S203. The radio frequency detector receives the voltage signal, extracts the low-frequency envelope signal of the voltage signal, and transmits the low-frequency envelope signal to the peak hold circuit. S204. The peak hold circuit receives the low-frequency envelope signal, processes the low-frequency envelope signal to obtain the maximum value of the low-frequency envelope signal, and outputs the maximum value of the low-frequency envelope signal to the analog comparator. S205. The analog comparator receives the maximum value of the low-frequency envelope signal and compares the maximum value of the low-frequency envelope signal with a reference level. If the processed low-frequency envelope signal is greater than the reference level, it outputs a digital high level to the microcontroller. The reference level is preset by the microcontroller and transmitted to the analog comparator. S206. The microcontroller receives the digital high level, determines the electromagnetic wave signal as an interference signal based on the digital high level, then samples the interference signal and outputs an interference warning signal, as well as outputting the IO switch disconnect signal and the alarm audio alarm signal.

7. The method for monitoring radio frequency electromagnetic signals in a measuring device according to claim 6, characterized in that, In step S206, the microcontroller samples the interference signal and outputs an interference warning signal, including: The microcontroller samples the interference signal to obtain the interference signal; The microcontroller compares the interference signal with a preset interference threshold. If the value of the interference signal is greater than the preset interference threshold, the microcontroller outputs an interference warning signal, sets the interference flag in the microcontroller program to a high level, and outputs the information of setting the interference flag to a high level to the memory for storage.

8. The method for monitoring radio frequency electromagnetic signals in a measuring device according to claim 6, characterized in that, In step S206, after the sampling of the interference signal is completed, the method further includes: The microcontroller sets the peak hold circuit to ENV mode. Then, when the analog comparator outputs a digital low level, the microcontroller sets the peak hold circuit to PHK mode. In ENV mode, the peak hold circuit performs transmission processing on the low-frequency envelope signal and directly outputs the low-frequency envelope signal to the analog comparator.

9. The method for monitoring radio frequency electromagnetic signals in a measuring device according to claim 6, characterized in that, The microcontroller includes a PRD counter. After outputting a digital high level to the microcontroller in step S205, the method further includes: The microcontroller starts the PRD counter to begin counting; Correspondingly, after the sampling of the interference signal in step S206 is completed, it is determined whether the PRD counter has overflowed. If the PRD counter overflows and the analog comparator still outputs a digital high level to the microcontroller, then steps S202-S206 are executed again. If the PRD counter does not overflow and the analog comparator outputs a digital low level to the microcontroller, then the PRD counter stops counting.

10. The method for monitoring radio frequency electromagnetic signals in a measuring device according to claim 6, characterized in that, In step S105, the duration of playing the alarm audio is preset by the microcontroller.

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