A topological signal recognition device detection apparatus

Abstract

The application discloses a kind of topological signal identification equipment detection device, including host computer unit, programmable ac source, central processing unit, programmable topological signal generating device, signal attenuation unit, current transformer and DUT tool table position.The device integrates the detection evaluation function of the anti-frequency offset performance, anti-attenuation performance of topological signal identification equipment in the same device, with the advantages of simple composition, intelligent, easy to operate, high reliability and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power distribution network, and particularly relates to a kind of topological signal identification equipment detection device. BACKGROUND

[0002] At present, the low-voltage area topology identification technology based on power frequency injection characteristic current mode has been mature, and its technical implementation principle is that the topological signal generation equipment injects (modulates) the topological signal with characteristic frequency and characteristic code information into the power cable at power frequency low voltage by using a special circuit, and the topological signal identification equipment identifies (analyzes) the topological signal from the power cable through the current transformer, and then realizes the topological relationship.

[0003] With the improvement of the topological identification equipment, the corresponding technical standards and specifications are gradually formed, and the frequency, amplitude, code format and content, and sampling frequency of the topological signal are constrained in the standards and specifications, but there is lack of a detection device capable of detecting the performance of the topological identification equipment. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a device capable of detecting and evaluating the anti-frequency offset performance and the anti-attenuation performance of the topological signal identification equipment.

[0005] To solve the above technical problems, the present application provides a kind of topological signal identification equipment detection device, including host computer unit, programmable AC source, central processor unit, programmable topological signal generation device, signal attenuation unit, current transformer and DUT tool table position;The host computer unit is connected with the central processor unit, the programmable AC source, the DUT tool table position, the programmable AC source is electrically connected with the signal attenuation unit, the central processor unit is electrically connected with the signal attenuation unit and the programmable topological signal generation device, the signal attenuation unit is electrically connected with the programmable topological signal generation device, and the current transformer is electrically connected with the DUT tool table position;The host computer unit is used for setting detection items and detection parameters, running or stopping detection, viewing detection results, and generating detection report;The programmable AC source is used for outputting the corresponding frequency and voltage setting value of AC power according to the frequency and voltage setting value sent by the host computer unit;The central processor unit is used for receiving the host computer unit instruction, controlling the signal attenuation unit and the programmable topological signal generation device to execute corresponding actions;The signal attenuation unit is used for attenuating topological signal;The programmable topological signal generation device is used for generating topological signal with set center frequency;The DUT tool table position is used for placing the measured topological identification equipment, providing power supply for the measured topological identification equipment, collecting and uploading the identification results of the measured topological identification equipment.

[0006] Further, the signal attenuation unit comprises N controllable double-throw switch devices, N is an integer greater than or equal to 2, the common end of the N controllable double-throw switch devices is connected with the live line input end of the programmable topology signal generating device, the normally open end and the normally closed end of the N controllable double-throw switch devices are connected with the live line output end of the programmable AC source, the connection line between the normally open end of the N controllable double-throw switch devices and the live line output end of the programmable AC source or the connection line between the normally closed end of the N controllable double-throw switch devices and the live line output end of the programmable AC source passes through the current transformer coil, the output end of the current transformer is connected with the DUT tool table position, and the zero line output end of the programmable AC source is connected with the zero line input end of the programmable topology signal generating device.

[0007] Further, the controllable double-throw switch device is a relay, and the relay comprises a normally open end, a normally closed end and a common end.

[0008] Further, the signal attenuation unit further comprises N relay drive circuits, the relay drive circuits receive control signals sent by the central control processor unit to drive corresponding relays to make on-off or off actions.

[0009] Further, the central control processor unit is an MCU system board, and the MCU system board comprises a UART interface, a GPIO interface and a PWM output interface.

[0010] Further, the PWM output interface of the MCU system board is connected with the programmable topology signal generating device.

[0011] Further, the GPIO interface of the MCU system board is connected with the signal attenuation unit.

[0012] Further, the UART interface of the MCU system board is connected with the host computer unit through a level conversion circuit.

[0013] Further, the host computer unit is a PC or a mobile terminal.

[0014] Further, the MCU system board comprises an ARM Corex-M4 microcontroller.

[0015] The application has the following advantages:

[0016] At present, the topology identification technology is mature and stable, and a unified standard specification is initially formed, but the specific implementation methods of the technology are not unified, and therefore a black box evaluation method is needed to detect the advantages and disadvantages of various topology signal identification devices. The technical scheme disclosed by the application integrates the detection and evaluation of the frequency offset resistance performance and the attenuation resistance performance of the topology signal identification device in the same device, which is a black box evaluation method, and the device has the advantages of simple composition, intelligence, easy operation, high reliability and the like. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the component structure diagram of the embodiment of the application.

[0018] Figure 2 is Figure 1 the operation interface schematic diagram of the host computer unit A1.

[0019] Figure 3 is Figure 1 the component structure diagram of the signal attenuation unit A5.

[0020] Figure 4 is Figure 1 the MCU system board processor unit MCU circuit diagram of the central control processor unit 103. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are some of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0022] It should be understood that when used in the specification and the appended claims, the terms "comprise" and "include" indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0023] It should be further understood that the term "and / or" used in the specification and the appended claims indicates one or more of the associated listed items and all possible combinations of the items, and includes these combinations.

[0024] As Figure 1As shown, a kind of topological signal recognition equipment detection device, including host computer unit 101, programmable AC source 102, central processor unit 103, programmable topological signal generating device 105, signal attenuation unit 104, current transformer (CT) 107 and DUT tool table position 106.Host computer unit 101 with central processor unit 103, programmable AC source 102, DUT tool table position 106 are connected by serial port RS232 communication, programmable AC source 102 and signal attenuation unit 104 are electrically connected, central processor unit 103 and signal attenuation unit 104, programmable topological signal generating device 105 are electrically connected, signal attenuation unit 104 and programmable topological signal generating device 105 are electrically connected, current transformer 107 output and DUT tool table position 106 are electrically connected.

[0025] Host computer unit 101 is PC or mobile terminal, host computer unit 101 runs host computer software, and the man-machine interface of host computer software is as shown in Figure 2 The operator sets detection item and detection parameter by host computer software, and runs or stops detection, and views detection result, and generates detection report.

[0026] Programmable AC source 102 communicates with host computer unit 101 by RS232 interface, and outputs corresponding frequency and voltage setting value AC power according to the frequency and voltage setting value sent by host computer unit 101.

[0027] Central processor unit 103 is MCU system board, and communicates with host computer unit 101 by RS232 interface, receives host computer unit 101 instruction, and controls signal attenuation unit 104 and programmable topological signal generating device 105 to execute corresponding action.

[0028] Programmable topological signal generating device 105 generates topological signal of set center frequency under the control of central processor unit, and is used for the identification of measured topological identification equipment.

[0029] DUT tool table position 106 is used to place measured topological identification equipment, provides power supply for measured topological identification equipment, collects and uploads the identification result of measured topological identification equipment, and communicates with host computer unit 101 by RS232 interface and uploads the identification result of measured topological identification equipment to host computer unit 101.

[0030] Signal attenuation unit 104 is used to attenuate topological signal, as shown in Figure 3As shown, the signal attenuation unit 104 includes a relay KT1, a relay KT2, a relay KT3,..., a relay KT10, and corresponding relay KT1 drive circuit, relay KT2 drive circuit, relay KT3 drive circuit,..., relay KT10 drive circuit. Each relay includes a common terminal, a normally open contact and a normally closed contact. When the relay is in a non-action state, the common terminal is connected to the normally closed contact and disconnected from the normally open contact. When the relay is in an action state, the common terminal is connected to the normally open contact and disconnected from the normally closed contact. The relay drive circuit is high level effective, that is, when the corresponding control signal output of the central processor unit is high level, the corresponding relay is in action. The zero line of the programmable AC power supply 102 is connected to the zero line input terminal of the programmable AC power supply 105. The fire line of the programmable AC power supply 102 is connected to the normally open contacts of the relays KT1, KT2, KT3,..., KT10, and the corresponding connection lines are LA1, LA2, LA3,..., LA10, respectively. The fire line of the programmable AC power supply 102 is also connected to the normally closed contacts of the relays KT1, KT2, KT3,..., KT10, and the corresponding connection lines are LB1, LB2, LB3,..., LB10, respectively. The common terminals of the relays KT1, KT2, KT3,..., KT10 are connected to the fire line input terminal of the programmable AC power supply 105. The connection lines LA1, LA2, LA3,..., LA10 of the fire line of the programmable AC power supply 102 and the normally open contacts of the relays KT1, KT2, KT3,..., KT10 pass through the coil of the current transformer 107. The output of the current transformer 107 is connected to the DUT tool table position 106. The DUT tool table position 106 is powered by the connection line passing through the current transformer 107. When a certain relay is in an action state, its common terminal is connected to the normally open contact and disconnected from the normally closed contact. By sequentially controlling the relays KT1, KT2, KT3,..., KT10, the topology signal attenuation from the coil of the current transformer 107 to the DUT tool table position 106 can be achieved.

[0031] As Figure 4As shown, the MCU microcontroller D1 of the central control processor unit 103 selects an ARM Corex-M4 microcontroller HC32F460 as the MCU, which has a main frequency of 168 MHz, 512 KB Flash, 192 KB SRAM, 4 UART interfaces, and a maximum of 83 GPIOs. Capacitors C1, C6 and crystal oscillator Y1 are microcontroller crystal oscillator circuits that provide an external clock source for the microcontroller D1; resistors R1 and capacitors C7 are microcontroller D1 power-on reset circuits that initialize the microcontroller when power is off; capacitors C2, C3, C4, C5, C8, C9, C10, C11, and C12 are filter capacitors that filter high-frequency noise from the power supply interfaces of the microcontroller D1 to ensure stable power supply.

[0032] The pin Pin20 of the microcontroller D1 is a PWM output connected to the programmable topology signal generating device 105, and the PWM frequency of this pin is the topology signal frequency.

[0033] The pins Pin39 and Pin43 of the microcontroller D1 are serial ports for communication with the host computer unit 101. Since the microcontroller D1 serial port is TTL level and the host computer unit 101 serial port is RS232 level, the two levels are not compatible, and a level conversion circuit is needed to realize information exchange between the two.

[0034] The pins Pin1 and Pin2 of the microcontroller D1 are configured as serial ports for local maintenance of the microcontroller D1, printing system operation logs, and upgrading. The pins Pin10-Pin19 of the microcontroller D1 are GPIO functions for controlling the relays KT1, KT2, KT3,..., KT10 of the signal attenuation unit, and the logic and attenuation coefficient relationship is shown in Table 1.

[0035] Table 1 Control GPIO logic level and attenuation coefficient comparison table

[0036]

[0037] For example, when the attenuation coefficient is set to 0.1, according to the logic comparison table in Table 1, the relay KT1 is actuated, and at this time the programmable topology signal generating device power is provided by LA1, LB2, LB3, LB4, LB5, LB6, LB7, LB8, LB9, and LB10. When the topology signal is generated, the topology signal is approximately evenly distributed to the 10 power lines, while the current transformer 107 only detects the current on LA1. At this time, the measured topology signal recognition device on the DUT tool table 106 only detects 1 / 10 of the topology signal, thereby achieving the purpose of attenuating the topology signal.

[0038] If it is necessary to detect whether the measured identification device can correctly identify the topology signal when there is deviation in the power frequency alternating frequency, the device can be used to detect the frequency offset resistance performance of the measured topology signal identification device, and the steps are as follows:

[0039] S01: In the software interface of the upper computer unit 101 as shown in the figure, the frequency offset test is selected, the working frequency is selected as 47Hz or 51Hz, the attenuation coefficient is defaulted as 1.0, the working power is defaulted as 220VAC, the topology signal frequency is defaulted as 833.3Hz, and the running is clicked. Figure 2

[0040] S02: The upper computer unit 101 transmits the working frequency and working power parameters to the programmable alternating current source 102 through the RS232 interface, the programmable alternating current source 102 outputs alternating current power of the set frequency and voltage, and the software interface log window of the upper computer unit 101 prompts "AC source setting success".

[0041] S03: The upper computer unit 101 communicates with the central control processor unit 103 through the RS232 interface, transmits the attenuation coefficient, the central control processor unit 103 controls the signal attenuation unit relay to act according to the set value, and the upper computer interface log window prompts "attenuation coefficient setting success".

[0042] S04: The upper computer unit 101 communicates with the central control processor unit 103 through the RS232 interface, transmits the topology signal frequency, the central control processor unit 103 controls the programmable topology signal sending device 105 to generate the topology signal of the corresponding frequency according to the set value, and after the topology signal sending is completed, the software interface log window of the upper computer unit 101 prompts "topology signal sending success".

[0043] S05: The upper computer communicates with the DUT tool table position 106 through the RS232 interface, reads the identification result of the measured topology identification device, and after the reading is completed, the software interface log window of the upper computer unit 101 prompts "read data success, test complete".

[0044] S06: The software interface of the upper computer unit 101 clicks to generate the report button, generates the test report this time, and the test is completed.

[0045] In the actual application process, due to the different distribution parameters of the power lines and equipment, the topology signal detected at the identification device is generally smaller than the topology signal generated by the topology signal sending device. In order to ensure the accuracy of the identification device, it is necessary to test the attenuation resistance of the identification device, that is, to determine the minimum receiving sensitivity of the device. The device can be used to detect the attenuation resistance performance of the measured topology signal identification device, and the steps are as follows:

[0046] S01: In the software interface of the upper computer unit 101 as shown in the figure, Figure 2 ​The host computer unit 101 software interface shown selects the attenuation test, sets the working power supply parameters (frequency, voltage), the topology signal frequency and the attenuation coefficient.

[0047] S02: The host computer unit 101 sends the working frequency and the working power supply parameters to the programmable AC source 102 through the RS232 interface, the programmable AC source 102 outputs the AC power with the set frequency and voltage, and the host computer unit 101 software interface log window prompts "AC source setting success".

[0048] S03: The host computer unit 101 communicates with the central control processor unit 103 through the RS232 interface, sends the attenuation coefficient, the central control processor unit 103 controls the signal attenuation unit relay to act according to the set value, and the host computer interface log window prompts "attenuation coefficient setting success".

[0049] S04: The host computer unit 101 communicates with the central control processor unit 103 through the RS232 interface, sends the topology signal frequency, the central control processor unit 103 controls the programmable topology signal sending device 105 to generate the topology signal with the corresponding frequency according to the set value, and after the topology signal sending is completed, the host computer unit 101 software interface log window prompts "topology signal sending success".

[0050] S05: The host computer communicates with the DUT tool table position 106 through the RS232 interface, reads the identification result of the measured topology identification equipment, reads the analysis identification result of the measured topology identification equipment after reading is completed, the host computer unit 101 software interface log window prompts "read data success, test complete".

[0051] S06: The host computer unit 101 software interface clicks the report generation button to generate the test report this time, and the test is completed.

[0052] The embodiments of the application can be adjusted, combined and deleted in sequence according to actual needs.

[0053] The embodiments have introduced the scheme in detail, the principle and the implementation mode of the application are described by applying specific examples in the paper, and the above embodiments are only used to help understand the method and the core idea of the application; meanwhile, for the general technical personnel in the art, according to the idea of the application, the specific implementation mode and the application range will be changed, and the above is not understood as the limitation of the application.

Claims

1. A topological signal recognition device detection apparatus, characterized by, The apparatus comprises a host computer unit, a programmable AC source, a central control processor unit, a programmable topology signal generating device, a signal attenuation unit, a current transformer and a DUT tool table; the host computer unit is in communication connection with the central control processor unit, the programmable AC source and the DUT tool table, the programmable AC source is in electrical connection with the signal attenuation unit, the central control processor unit is in electrical connection with the signal attenuation unit and the programmable topology signal generating device, the signal attenuation unit is in electrical connection with the programmable topology signal generating device, and the current transformer is in electrical connection with the DUT tool table; The host computer unit is used for setting detection items and parameters, running or stopping detection, checking detection results and generating detection reports. The programmable AC source is used for outputting AC power of corresponding frequency and voltage setting values according to frequency and voltage setting values sent by the host computer unit. The central control processor unit is used for receiving instructions from the host computer unit and controlling the signal attenuation unit and the programmable topology signal generating device to perform corresponding actions. The signal attenuation unit is used for attenuating topology signals. The programmable topology signal generating device is used for generating topology signals of a set center frequency. The DUT tool table is used for placing a measured topology identification device, providing power supply for the measured topology identification device and collecting and uploading identification results of the measured topology identification device. The signal attenuation unit comprises N controllable double-pole switches, where N is an integer greater than or equal to 2, the common end of the N controllable double-pole switches is connected with the power line input end of the programmable topology signal generating device, the normally open end and the normally closed end of the N controllable double-pole switches are connected with the fire line output end of the programmable AC source, the connection line between the normally open end of the N controllable double-pole switches and the fire line output end of the programmable AC source or the connection line between the normally closed end of the N controllable double-pole switches and the fire line output end of the programmable AC source passes through the coil of the current transformer, the output end of the current transformer is connected with the DUT tool table, and the zero line output end of the programmable AC source is connected with the power zero line input end of the programmable topology signal generating device. The central control processor unit is an MCU system board, and the MCU system board comprises a UART interface, a GPIO interface and a PWM output interface.

2. The apparatus of claim 1, wherein the apparatus is configured to detect a topology of the signal. The controllable double-pole switch is a relay, and the relay comprises a normally open end, a normally closed end and a common end.

3. The apparatus of claim 2, wherein the apparatus is configured to detect a topology of the signal. The signal attenuation unit further comprises N relay driving circuits, and the relay driving circuits receive control signals sent by the central control processor unit to drive corresponding relays to make on-off or off actions.

4. The apparatus of claim 1, wherein the apparatus is configured to detect a topology of the signal. The PWM output interface of the MCU system board is connected with the programmable topology signal generating device.

5. The apparatus of claim 1, wherein the apparatus is configured to detect a topology of the signal. The GPIO interface of the MCU system board is connected with the signal attenuation unit.

6. The apparatus of claim 1, wherein the topology signal detection device is configured to detect a topology signal in a plurality of frequency bands. The UART interface of the MCU system board is in serial communication connection with the host computer unit through a level conversion circuit.

7. The apparatus of claim 1, wherein the apparatus is configured to detect a topology of the signal. The host computer unit is a PC or a mobile terminal.

8. The apparatus of claim 1, wherein the apparatus is a topology signal detection device, and wherein the processor is further configured to: determine a topology of the network based on the received signal. The MCU system board comprises an ARM Corex-M4 microcontroller.

Images