CN111149307A - Transmission line, transmission line with connector, and repeater - Google Patents
Transmission line, transmission line with connector, and repeater Download PDFInfo
- Publication number
- CN111149307A CN111149307A CN201880061994.4A CN201880061994A CN111149307A CN 111149307 A CN111149307 A CN 111149307A CN 201880061994 A CN201880061994 A CN 201880061994A CN 111149307 A CN111149307 A CN 111149307A
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- electric field
- field communication
- connector
- voltage
- transmission line
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
Abstract
In the transmission and reception of signals along a wire or a cable, it is not necessary to separately provide a signal line for the transmission and reception of the signals, and the influence on other devices and components is reduced. A connector-equipped transmission line (10) is a connector-equipped transmission line (10) that has a conductor (12a) and an insulator (12b) covering the conductor (12a) and is connected to a main control circuit (2), and is provided with: a pair of electric field communication modules (38, 40) which are respectively arranged at a first end and a second end of the lead (12a) and which perform electric field communication using the insulator (12b) as a communication medium; and an output unit (52) which is connected to the electric field communication module (38) and outputs information received by the electric field communication or a processing result of the received information to a main control circuit (2).
Description
Technical Field
The invention relates to a transmission line, a transmission line with a connector, and a repeater.
Background
Generally, electric wires or cables are used for various devices and apparatuses to control transmission and reception of signals and supply of electric power. For example, in the power transmission device described in patent document 1, a power transmission line for transmitting electric power and a signal line for electrically connecting a disconnection detection sensor provided at a plurality of points of the power transmission line to a relay device are used. The information on the disconnection of the power transmission line detected by the disconnection detection sensor is transmitted to the relay device via the signal line. In this way, by using a signal line such as a signal line provided independently of the power transmission line, wired communication in which a signal is transmitted along the power transmission line can be performed.
Patent document 1: japanese laid-open patent publication No. H09-251050
On the other hand, as a communication technique not using a wire, a cable, or the like, there is known wireless communication in which signals are transmitted and received by radio waves. Such wireless communication does not require a wire or the like, but may cause a problem that radio waves used for communication affect other devices and components as noise.
Disclosure of Invention
In view of the above-described problems, an object of the present invention is to reduce the influence on other devices and components without additionally providing a signal line for transmitting and receiving a signal when transmitting and receiving the signal along a wire or a cable.
In order to achieve the above object, the present invention provides a transmission line including an insulator having a surface and a conductive line disposed inside the insulator, the transmission line including: a pair of electric field communication modules respectively arranged at the first end and the second end of the lead wire and performing electric field communication by using the insulator as a communication medium; and an output unit connected to one of the electric field communication modules and outputting information received by the electric field communication or a result of processing the received information.
Further, the present invention may be configured to include: a first measuring unit for measuring a voltage at the first end; a second measuring unit for measuring the voltage of the second end portion; and a determination unit that acquires a voltage of the first end portion and a voltage of the second end portion, and determines a state of the conductive wire based on a potential difference between the voltage of the first end portion and the voltage of the second end portion, wherein the determination unit acquires the voltage of the second end portion by electric field communication based on the pair of electric field communication modules.
The first measuring unit may include a first filter that extracts a signal in a specific frequency band generated from the first end portion, and measure the voltage of the first end portion based on the extracted signal, and the second measuring unit may include a second filter that extracts a signal in a specific frequency band generated from the second end portion, and measure the voltage of the second end portion based on the extracted signal.
The transmission line with a connector according to the present invention includes the transmission line, and a connector incorporating one of the electric field communication modules and the output unit.
The repeater according to the present invention is a repeater for relaying a connector provided at a first end portion of a wire or a cable having an insulator formed on a surface thereof and a connector provided in a device, and includes an electric field communication module capacitively coupled to the insulator at the first end portion, the electric field communication module performing electric field communication with an electric field communication module provided at a second end portion side of the wire or the cable using the insulator as a communication medium.
The transmission line, the transmission line with a connector, and the repeater of the present invention can perform electric field communication using an insulator as a communication medium with each other through the electric field communication module, and output information received through the electric field communication or a processing result of the information to a device. Since the transmission and reception of information can be performed by using the electric field communication between the electric field communication modules in this manner, it is not necessary to separately provide a communication wire. Further, since the electric power used for electric field communication is weak, the influence on other devices and components can be reduced.
Drawings
FIG. 1 is a schematic view showing a connection mode of a transmission line with a connector according to a first embodiment
FIG. 2 is a circuit diagram of the transmission line with connector
FIG. 3 is a block diagram of the above-mentioned transmission line with connector
FIG. 4 is a flowchart showing the operation of the first and second units of the transmission line with connector
FIG. 5 is a circuit diagram of a transmission line with connector according to modification 7
FIG. 6 is a frequency spectrum of a radio wave detected by the strip electrode of the transmission line with connector, FIG. 6(a) is a frequency spectrum before driving the peripheral device, and FIG. 6(b) is a frequency spectrum when driving the peripheral device
FIG. 7 is a diagram showing a part of a circuit configuration of a transmission line with a connector according to modification 7
FIG. 8 is a schematic diagram of a transmission line with a connector according to modification 8
FIG. 9 is a schematic diagram showing a use mode of a repeater according to a third embodiment
Detailed Description
[ first embodiment ]
Hereinafter, a transmission line with a connector according to an embodiment of the present invention will be described with reference to the drawings.
As shown in fig. 1, the transmission line with connector 10 of the present embodiment is supplied with DC power from the main control circuit 2 to the peripheral circuit 4, and includes an electric wire 12 used as a power supply line and an electric wire 14 used as a ground line. Each of the electric wires 12 and 14 includes a conductive wire 12a or 14a (fig. 2) such as a linear single wire or a stranded wire formed of a conductor mainly made of copper, an aluminum alloy, or the like, and an insulator 12b or 14b (fig. 2) covering the conductive wire 12a or 14 a.
The transmission line with connector 10 includes a first connector 16 disposed at a first end of the two electric wires 12, 14, and a second connector 18 disposed at a second end of the two electric wires 12, 14. The first connector 16 is connected to the connector 2a of the main control circuit 2, and the second connector 18 is connected to the connector 4a of the peripheral circuit 4. The first connector 16 and the second connector 18 have housings into which the connectors 2a and 4a are fitted, and connection terminals (not shown) that are electrically connected to the respective lead wires 12a and 14a are provided in the housings.
In the present embodiment, the peripheral circuit 4 described above is provided in a peripheral device (not shown) that repeatedly operates with respect to a main control device (not shown) in which the main control circuit 2 is provided, and the transmission line 10 with a connector is provided with an inspection device 20 (fig. 2) that inspects the deterioration state of the electric wires 12 and 14 due to bending or bending caused by the repeated operation. Here, the deteriorated state of the electric wires 12 and 14 refers to a state in which the lead wires 12a and 14a are broken due to cracks or the like generated in a part of the lead wires 12a and 14 a.
As shown in fig. 2, the inspection apparatus 20 includes a first unit 22 provided in the first connector 16 (fig. 1) and a second unit 24 provided in the second connector 18 (fig. 1).
The first unit 22 and the second unit 24 are each mounted with electronic devices such as differential amplifier circuits 26, 28, analog-to-digital converters (hereinafter, referred to as "ADCs") 30, 32, microcomputers (hereinafter, referred to as "MCUs") 34, 36, and electric field communication modules 38, 40 on a substrate. A constant power supply is supplied to these electronic devices from a constant voltage circuit (not shown) having the power supply line as an input power supply. In the following description, when the electronic devices are distinguished for each of the cells 22 and 24, the electronic devices of the first cell 22 are referred to as a first differential amplifier circuit 26, a first ADC30, a first MCU34, and a first electric field communication module 38, and the electronic devices of the second cell 24 are referred to as a second differential amplifier circuit 28, a second ADC32, a second MCU36, and a second electric field communication module 40.
One input of the first differential amplifier circuit 26 is connected to the first end of the lead 12a, and the other input thereof is connected to the first end of the lead 14 a. The difference between these input voltages is output from the first differential amplifier circuit 26. The amplification factor is determined in advance so that the output is at a level slightly lower than the power supply voltage supplied from the constant voltage circuit. Therefore, an analog signal indicating the voltage between the wires 12a and 14a at the first end portion is output from the first differential amplifier circuit 26. The second differential amplifier circuit 28 has the same circuit configuration as the first differential amplifier circuit 26, and outputs an analog signal indicating the voltage between the wires 12a and 14a at the second end portion. The signals output from the differential amplifier circuits 26 and 28 are input to the ADCs 30 and 32 connected to the differential amplifier circuits 26 and 28, respectively. The outputs of the ADCs 30 and 32 are connected to the MCUs 34 and 36, and digital signals converted by the ADCs 30 and 32 are input to the MCUs 34 and 36.
The MCUs 34 and 36 are connected to electric field communication modules 38 and 40 in addition to the ADCs 30 and 32. The electric field communication modules 38 and 40 are modules that perform electric field communication for transmitting signals by an electric field generated on the surfaces of the insulators 12b and 14b, and are capacitively coupled to the insulators 12b and 14b at the first and second ends via electrodes 42 and 44 wound around the insulators 12b and 14 b. The insulators 12b and 14b thus formed on the surfaces of the electric wires 12 and 14 serve as communication media for electric field communication.
Here, the first MCU34 of the present embodiment obtains the voltage between the leads 12a and 14a at the first end by the CPU executing a program stored in a memory. The first MCU34, the electrode 42, the first differential amplifier circuit 26, and the first ADC30 function as a first measurement unit 46 (fig. 3) for measuring the voltage between the lead wires 12a, 14a at the first end of the wire 12. Similarly, the second MCU36 obtains the voltage between the leads 12a and 14a of the second end portion by the CPU executing a program stored in a memory. The second MCU, the electrode 44, the second differential amplifier circuit 28, and the second ADC32 function as a second measurement unit 50 (fig. 3) for measuring the voltage between the lead wires 12a and 14a at the second end of the wire 12. As described in the operation flow described below, the first MCU34 functions as the determination unit 48 (fig. 3) that determines the deterioration state of the lead wires 12a and 14a based on the potential difference between the voltage received from the second MCU36 and the measured voltage. The first MCU34 also functions as the output unit 52 (fig. 3) that outputs the determination result.
The operation flow of the first unit 22 and the second unit 24 will be described below.
As shown in fig. 1, when the main control device is activated in a state where the first connector 16 and the second connector 18 are connected to the connectors 2a and 4a, power of the main control circuit 2 is supplied to the constant voltage circuit via the lead 12a, and power is supplied from the constant voltage circuit to the electronic device. The MCUs 34, 36 thereby start the processing defined by the program.
As shown in fig. 4, when the processing is started, first, the MCUs 34 and 36 execute synchronization processing (s101 and s201) for executing measurement processing (s102 and s202) described later in accordance with the timing. Specifically, in the synchronization process (s101), the first MCU34 controls the first electric field communication module 38, and transmits a trigger indicating the start of synchronization from the first electric field communication module 38 to the second electric field communication module 40. In the synchronization process (s201), the second MCU36 controls the second electric field communication module 40 to repeatedly confirm the reception state of the trigger. When the reception of the trigger is confirmed, the second MCU36 executes the measurement process (s 202). The first MCU34 executes measurement processing after the trigger is transmitted (s 102).
The measurement processes (s102, s202) are processes for measuring the voltage between the leads 12a, 14 a. Specifically, in the measurement process (s102), the first MCU34 controls the first ADC30 to convert the analog signal input from the first differential amplifier circuit 26 into a digital signal. Then, the first MCU34 acquires a voltage value indicating the voltage between the leads 12a, 14a of the first end portion (hereinafter referred to as "first voltage value") based on the digital signal. The second MCU36 also executes the process (s202) to acquire a voltage value indicating the voltage between the leads 12a and 14a at the second end (hereinafter referred to as "second voltage value").
After the measurement processing, each MCU34, 36 executes communication processing (s103, s 203). Specifically, in the communication process (s103), the first MCU34 controls the first electric field communication module 38, and transmits a transmission request of the second voltage value from the first electric field communication module 38 to the second electric field communication module 40. In the communication process (s203), the second MCU36 controls the second electric field communication module 40 to confirm the reception status of the transmission request. When the reception of the transmission request is confirmed, the second MCU36 controls the second electric field communication module 40 to transmit the second voltage value acquired in the measurement process (s202) to the first electric field communication module 38. The first MCU34 controls the first electric field communication module 38 to confirm the presence or absence of the second voltage value, and executes a determination process upon receiving the second voltage value.
The determination process is a process of determining the deterioration state of the conductive wires 12a, 14a based on the first voltage value and the second voltage value, and the first MCU34 sequentially executes a subtraction process (s104), a first comparison process (s105), a second comparison process (s106), and a signal output process (s107a, s107 b).
In the subtraction process (s104), the second voltage value is subtracted from the first voltage value to obtain the potential difference between the first end and the second end. This potential difference increases in value with an increase in conductor resistance caused by the progress of deterioration of the conductive wires 12a, 14 a. That is, the potential difference obtained by the subtraction processing (s104) indicates the deterioration state of the conductive wires 12a, 14 a.
In the first comparison process (s105), the upper limit value (first threshold) corresponding to the potential difference determined to be less deteriorated in the conductive wires 12a and 14a is compared with the potential difference obtained by the subtraction process (s 104). The processing is ended when the potential difference is smaller than the first threshold as a result of the comparison. On the other hand, when the potential difference obtained by the subtraction process is larger than the first threshold value, the second comparison process is executed (s 106).
In the second comparison process (s106), the lower limit value (second threshold value) corresponding to the potential difference determined to be the potential difference with a large amount of deterioration of the conductive wires 12a and 14a is compared with the potential difference obtained by the subtraction process (s 104). If the potential difference obtained by the subtraction process is smaller than the second threshold value as a result of the comparison, a warning signal indicating that the deterioration is progressing is output from the output terminal (s107 a). On the other hand, when the potential difference obtained by the subtraction is larger than the second threshold value, a deterioration signal indicating that the deterioration is large is output from the output terminal (s107 b). These warning signal and deterioration signal are transmitted to the main control device via the first connector 16. Upon receiving the warning signal or the deterioration signal, the main control device notifies a user or an administrator of the warning signal or the deterioration signal.
The inspection device 20 executes the above-described processing in this manner, thereby inspecting the deterioration state of the leads 12a and 14 a. These processes are not limited to the start of the main control device, and may be periodically executed during the operation of the main control device.
According to the transmission line with connector 10 of the present embodiment, the user or manager can be notified of the target of replacing the electric wires 12, 14. Further, by performing electric field communication using the first electric field communication module 38 and the second electric field communication module 40, the voltages at both ends can be synchronously measured without separately providing a communication electric wire (signal wire), and the voltage at the second end can be obtained at the first end. Further, since the electric power used for the electric field communication is weak, the influence on the main control circuit 2 and the peripheral circuit 4 can be reduced. Further, there is a possibility that communication connection cannot be secured in wireless communication using radio waves in places where the radio wave environment is poor, and the transmission line 10 according to the present embodiment uses the insulators 12b and 14b provided from the first end to the second end as communication media, and therefore can secure stable communication connection regardless of the quality of the radio wave environment.
The transmission line with connector 10 of the present invention has been described above based on the embodiments, but the present invention is not limited to the above-described embodiments, and can be implemented by the following embodiments, for example.
< modification 1 >
The synchronization process in the above-described operation flow is not necessarily required, and may be a flow in which the synchronization process is omitted.
< modification 2 >
Instead of the differential amplifier circuits 26 and 28 of the above embodiments, a voltage divider circuit that divides the voltage of the power supply line may be used, and the output of the voltage divider circuit may be input to the ADCs 30 and 32.
< modification 3 >
Although the first comparison process (s105) and the second comparison process (s106) are executed in the above-described operation flow, only the first comparison process (s105) may be executed, and the warning signal may be output when the potential difference is determined to be larger than the first threshold value in the first comparison process (s 105).
< modification 4 >
In the above embodiment, the determination result is output to the main control circuit 2, but a light emitting portion of a multi-color LED may be provided to the first connector 16 so as to be exposed, and the determination result may be notified to the user or the administrator by the light emission of the multi-color LED. For example, in the second comparison process (s106), the multicolor LED is caused to emit yellow light when the potential difference is smaller than the second threshold value, and the multicolor LED is caused to emit red light when the potential difference is larger than the second threshold value. This allows the user or administrator to intuitively specify the deterioration state.
< modification 5 >
The transmission line with connector 10 of the above embodiment includes the electric wire 12 used as a power supply line for supplying electric power from the main control circuit 2 to the peripheral circuit 4 and the electric wire 14 used as a ground line, but may further include another electric wire used as a control line for the main control circuit 2 to control the peripheral circuit 4.
In the embodiment including the above-described other electric wires, the first unit 22 is provided with a third differential amplifier circuit for measuring a voltage between the lead wire 14a at the first end portion and the other lead wire, and the second unit 24 is provided with a fourth differential amplifier circuit for measuring a voltage between the lead wire 14a at the second end portion and the other lead wire. In addition, the ADC of the first unit 22 is a multichannel ADC that performs AD conversion by switching the output signal of the first differential amplifier circuit 26 and the output signal of the third differential amplifier circuit. Similarly, the ADC of the second unit 24 uses a multichannel ADC that performs AD conversion by switching the output signal of the second differential amplifier circuit 28 and the output signal of the fourth differential amplifier circuit.
In the first unit 22, measurement processing is performed for each channel of the ADC (s 102). Thus, the first MCU34 obtains a first voltage value corresponding to the output of the first differential amplifier circuit 26 and a third voltage value corresponding to the output of the third differential amplifier circuit. In the second unit 24, measurement processing is performed for each channel of the ADC (s202), and a second voltage value corresponding to the output of the second differential amplifier circuit 28 and a fourth voltage value corresponding to the output of the fourth differential amplifier circuit are acquired.
Then, in the communication process (s103, s203), the second voltage value and the fourth voltage value are transmitted to the first MCU34 by electric field communication. In addition, the deterioration state of the wire 12a is determined based on the potential difference between the first voltage value and the second voltage value by the subtraction processing (s104) and the comparison processing (s105, s106) by the first MCU34, and the deterioration state of the other wire is determined based on the potential difference between the third voltage value and the fourth voltage value.
< modification 6 >
The transmission line with connector of the present embodiment may be such that the wires 12 and 14 are covered with a sleeve 64 (fig. 5) as an insulator. That is, the transmission line with connector may be provided with a cable. In this manner, electrodes are wound around the respective first and second ends of the sleeve 64, and the electric field communication modules 38 and 40 are capacitively coupled to the sleeve 64 via the respective electrodes. Electric field communication for transmitting signals is performed by an electric field generated on the surface of the sleeve 64. That is, the sleeve 64 of the transmission line with connector provided with the cable becomes a communication medium for electric field communication.
< modification 7 >
As shown in fig. 5, the transmission line with connector according to the present embodiment may determine the deterioration state by collectively connecting the electric wire group 112 including the electric wires 12 and 14 for power and the signal line 54. In this embodiment, the first unit 22 and the second unit 24 are provided with: strip electrodes 56, 58 wound around the insulators 12b, 14b, 54b at the respective ends of the electric wire group 112; a first filter 60 and a second filter 62 electrically connected to the strip electrodes 56 and 58; a first ADC30 and a second ADC32 having inputs electrically connected to outputs of the respective filters 60, 62; a first MCU34 and a second MCU36 electrically connected to each of the ADCs 30 and 32 so as to be able to control them.
The strip electrodes 56 and 58 are, for example, copper foil strips formed by strip-shaped copper as a conductor, and an adhesive layer is formed on the mounting surface of the strip electrodes to the insulators 12b, 14b, and 54 b. The band electrodes 56, 58 are wound so as to bundle the insulators 12b, 14b, 54 b. By winding the strip electrodes 56 and 58 in this manner, the strip electrodes 56 and 58 receive radio waves from the electric wire group 112.
Here, in the present modification, radio waves received by the strip electrodes 56 and 58 before the peripheral devices are operated are as shown in fig. 6 (a). On the other hand, when the peripheral device is operated, the radio waves received by the strip electrodes 56 and 58 are as shown in fig. 6 (b). As is clear from comparison of the graphs, a difference in frequency spectrum around 2kHz occurs before and after the operation of the peripheral device, and the voltage increases by about 10dB after the operation of the peripheral device. In other words, when the electric wire group 112 is deteriorated, the increase amount of the second end portion of the electric wire group 112 is decreased (voltage close to a state of stopping the same), and the deterioration of the electric wire is detected by detecting the decrease in the increase amount in the present modification.
Therefore, both filters 60 and 62 provided in first section 22 and second section 24 are preferably set to extract the signals of the frequency components and have the same frequency band (pass band or stop band). As described above, the frequency component to be extracted by the peripheral device in this example is 2kHz, but the frequency component to be extracted is appropriately set according to the frequency of the signal input to the peripheral device or the power supplied thereto. Further, since the frequency of the electric power is generally lower than the frequency of the signal, as shown in fig. 7, a low pass filter (hereinafter, referred to as LPF60a, 62a) for extracting the frequency component of the electric wave emitted from the electric power wires 12, 14 in the electric wire group 112, a high pass filter (hereinafter, referred to as HPF60b, 62b) for extracting the frequency component of the electric wave emitted from the signal wire 54, LPF ADCs 30a, 32a for converting the output signals of the LPFs 60a, 62a into digital signals, and HPF ADCs 30b, 32b for converting the output signals of the HPFs 60b, 62b into digital signals may be provided to separately detect the deterioration of the electric wires 12, 14 and the signal wire 54.
Returning to fig. 5, the signals output from the two filters 60, 62 are converted into digital signals by the corresponding ADCs 30, 32, and input to the MCUs 34, 36, and voltage values are acquired by the MCUs 34, 36. The flow until the voltage values are acquired by the MCUs 34 and 36 is the same as in the above-described embodiment, and is acquired by the measurement process (s102) after the synchronization process (s101) is executed. Here, as shown in fig. 7, in the case of using the LPFs 60a, 62a (filters for the electric wires 12, 14) and the HPFs 60b, 62b (filters for the signal line 54), the first synchronization processing and the power line measurement processing for measuring the voltage from the signal taken out through the LPFs 60a, 62a are performed, and the second synchronization processing and the signal line measurement processing for measuring the voltage from the signal taken out through the HPFs 60b, 62b are performed next.
In the communication process (s103), the voltage value is transmitted from the second unit 24 to the first unit 22 using the electric field communication, but when two types of filters ( LPFs 60a, 62a and HPFs 60b, 62b) are used, the power line voltage value measured in the power line measurement process and the signal line voltage value measured in the signal line measurement process are transmitted. Then, in the subtraction process (s104), the power line voltage value of the second unit 24 is subtracted from the power line voltage value of the first unit 22 to obtain the potential difference between the power lines 12 and 14, and the signal line voltage value of the second unit 24 is subtracted from the signal line voltage value of the first unit 22 to obtain the potential difference between the signal lines 54.
Then, in the first comparison process (s105), the comparison between the potential difference of the electric wires 12 and 14 obtained in the subtraction process (s104) and the first threshold value and the comparison between the potential difference of the signal line 54 and the first threshold value are performed. The first threshold may be set independently for each of the electric wires 12 and 14 and the signal line 54. The second comparison process is executed when any one of the potential differences is larger than the first threshold as a result of the comparison. In the second comparison processing, the comparison of the potential difference of the electric wires 12, 14 with the second threshold value and the comparison of the potential difference of the signal line 54 with the second threshold value are performed. The second threshold may be set independently for each of the electric wires 12 and 14 and the signal line 54. As a result of the comparison, when it is determined in the first comparison process that the value larger than the first threshold value is smaller than the second threshold value, a warning signal is output (s107 a). On the other hand, if the value is larger than the second threshold value, the deterioration signal is output (s107 b).
According to the transmission line with connector of the present modification, the presence or absence of deterioration can be determined on a per-wire group 112 basis. Therefore, it is not necessary to increase or decrease the number of circuit components and the number of MCUs to be processed depending on the number of wires constituting the wire group 112. In particular, even a multi-core cable in which a large number of wires are combined can be configured with the same number of parts, so that the units 22 and 24 can be prevented from being bulky and an increase in product cost can be suppressed.
In order to efficiently extract a specific frequency band, one or both of the LPFs 60a and 62a and the HPFs 60b and 62b may be replaced with a band pass filter. The band pass filter may be electrically connected to the MCUs 34 and 36, so that a frequency band to be extracted can be appropriately set by the MCUs 34 and 36. In order to set the frequency band appropriately in this manner, the voltage values output from the band pass filter are acquired for all the frequency bands before the operation of the peripheral device, and are temporarily stored in the memory, and after the operation of the peripheral device, the voltage values output from the band pass filter are acquired again for all the frequencies. Then, the temporarily stored voltage values and the newly acquired voltage values can be compared for each frequency, and a band in which a difference can be recognized (or is significant) can be set as a band to be extracted by the band pass filter.
< modification 8 >
The transmission line with connector of the present embodiment may be a branched type as shown in fig. 8. The transmission line with connector 100 includes a first wire group 112a wired from the main control circuit 2 to the first peripheral circuit 104, and a second wire group 112b wired from the main control circuit 2 to the second peripheral circuit 114. First end portions of the first and second wire groups 112a and 112b are each connected to a connector 2a of the main control circuit 2 via a common connector (hereinafter, referred to as "common connector") 116. The second end of the first wire group 112a is connected to the connector 104a of the first peripheral circuit 104 via the connector 118 a. In addition, the second end of the second wire group 112b is connected to the connector 114a of the second peripheral circuit 114 via the connector 118 b.
Here, the same unit as the second unit 24 described above is incorporated in the connector 118a of the first wire group 112a, and the same unit as the second unit 24 described above is also incorporated in the connector 118b of the second wire group 112 b.
The common connector 116 includes a unit including a differential amplifier circuit for measuring a voltage between the wires of the first wire group 112a, a differential amplifier circuit for measuring a voltage between the wires of the second wire group 112b, a multi-channel ADC for AD-converting an output signal of each differential amplifier circuit, an electric field communication module capacitively coupled to each of the wire groups 112a and 112b via electrodes wound around the first wire group 112a and the second wire group 112b, and an MCU.
The electric field communication module in the common connector 116 communicates with the electric field communication module in the connector 118a using the insulators 12b and 14b of the first wire group 112a as a communication medium, and receives a voltage between the wires of the first wire group 112a on the connector 118a side. The electric field communication module in the common connector 116 communicates with the electric field communication module in the connector 118b using the insulators 12b and 14b of the second wire group 112b as a communication medium, and receives a voltage between the wires of the second wire group 112b on the connector 118b side.
The MCU in the common connector 116 acquires the voltage between the wires on the connector 118a side received by the electric field communication module, and controls the ADC to acquire the voltage between the wires of the first wire group 112a on the common connector 116 side. Then, based on the obtained potential difference of the two voltages, the deterioration state of the first wire group 112a is determined.
The MCU in the common connector 116 acquires the voltage between the wires on the connector 118b side received by the electric field communication module, and controls the ADC to acquire the voltage between the conductors of the second wire group 112b on the common connector 116 side. Then, based on the obtained potential difference of the two voltages, the deterioration state of the second wire group 112b is determined.
< modification 9 >
The first connector 16 and the second connector 18 are not necessarily configured, and the first ends of the wires 12a and 14a may be directly connected to the main control circuit 2. Alternatively, the second ends of the leads 12a and 14a may be directly connected to the peripheral circuit 4. That is, only one of the connectors (for example, only the first connector 16) may be provided. In such an embodiment, the other unit (e.g., the second unit 24) is built in the connected device (e.g., the peripheral device).
< modification 10 >
Further, a communication device may be provided instead of the inspection device 20 described above. The communication device includes a first cell 22 having a first MCU34 and a first electric field communication module 38, and a second cell 24 having a second MCU36 and a second electric field communication module 40. The first MCU34 is connected to the control terminal of the connector 2a via the first connector 16, and the second MCU36 is connected to the control terminal of the connector 4a via the second connector 18. The first MCU34 acquires a control command input from the control terminal, controls the first electric field communication module 38, and transmits the control command to the second electric field communication module 40. The second MCU36 acquires a control command from the second electric field communication module 40 and outputs the control command to the control terminal of the connector 4 a. In this way, the first MCU34 functions as an acquisition unit that acquires an input from a device connected to the first connector 16, and the second MCU36 functions as an output unit that outputs information received via electric field communication to a device connected to the second connector 18.
[ second embodiment ]
The transmission line according to the second embodiment is different from the first embodiment in that it does not include the first connector 16 and the second connector 18, but the other configurations are the same as those of the first embodiment. That is, the transmission line of the present embodiment includes a lead wire 12a covered with an insulator 12b, a lead wire 14a covered with an insulator 14b, a first unit 22 disposed at a first end of the lead wires 12a, 14a, and a second unit 24 disposed at a second end of the lead wires 12a, 14a, and both ends of the lead wires 12a, 14a are directly connected to the main control circuit 2 and the peripheral circuit 4. The operation flow of the first unit 22 and the second unit 24 is also the same as that of the first embodiment shown in fig. 4. The transmission line according to the present embodiment may be applied to the above-described modifications.
[ third embodiment ]
As shown in fig. 9, the third embodiment is different from the first embodiment in that a known connector-equipped electric wire 212 and a pair of repeaters 300 are used. The well-known connector-equipped electric wire 212 is constituted by the conductive wires 12a, 14a (fig. 2), insulators 12b, 14b (fig. 2) covering the conductive wires 12a, 14a, and a pair of connectors 216, 218 provided at both end portions of the conductive wires 12a, 14 a. The connectors 216 and 218 may be provided with the units 22 and 24 according to the first embodiment.
The pair of repeaters 300 includes a first repeater 300a disposed between the connector-equipped electric wire 212 and the main control device, and a second repeater 300b disposed between the connector-equipped electric wire 212 and the peripheral device. The first relay 300a relays the connector connection of the main control device and the connector-equipped electric wires 212, and the second relay 300b relays the connector connection of the peripheral device and the connector-equipped electric wires 212.
The first relay 300a includes a wire-side connector 302a connected to the first connector 216 provided at the first end of the connector-equipped wire 212, and a device-side connector 304a connected to the connector 2a of the circuit (main control circuit 2) provided in the main control device. A circuit 306 is provided between the wire-side connector 302a and the device-side connector 304a, and corresponding connector terminals are electrically connected through the circuit 306.
Similarly, the second relay 300b includes a wire-side connector 302b connected to the second connector 218 provided at the second end of the connector-equipped wire 212 and a device-side connector 304b connected to the connector 4a of the circuit (peripheral circuit 4) provided in the peripheral equipment, and a circuit (not shown) for conducting the corresponding connector terminals is provided between the wire-side connector 302b and the device-side connector 304 b.
Here, the pair of repeaters 300 incorporates MCUs 34, 36 (fig. 2) and electric field communication modules 38, 40 (fig. 2). The MCUs 34 and 36 and the electric field communication modules 38 and 40 are operated by electric power supplied from batteries (not shown) provided in the relays 300a and 300b or the main control circuit 2. The electric field communication modules 38 and 40 are capacitively coupled to the insulators 12b and 14b (fig. 2) forming the surface of the connector-equipped wire 212 via electrodes 308 such as electric clips, and perform electric field communication using the insulators 12b and 14b as communication media.
The first MCU34 is communicably connected to the main control circuit 2 via the device-side connector 304a, and acquires a control signal to the peripheral circuit 4 from the main control circuit 2. When the first MCU34 acquires the control signal, it controls the first electric field communication module 38 to transmit the control signal to the second electric field communication module 40.
The second MCU36 controls the second electric field communication module 40 to receive a control signal. When receiving the control signal, the second MCU36 transmits the control signal to the peripheral circuit 4 via the device-side connector 304 b.
According to the present embodiment, since the control signal from the main control circuit 2 to the peripheral circuit 4 is transmitted by electric field communication, it is not necessary to separately provide a signal line for transmitting the control signal. Further, the influence on other devices and components can be reduced. In addition, since the known connector-equipped wire 212 can be used in the present embodiment, it is not necessary to newly prepare a wire for performing electric field communication.
In the present embodiment, a known connector-equipped electric wire 212 is described as an example, but a known connector-equipped cable may be used. In the case of using this connectorized cable, the electric field communication modules 38, 40 of the pair of repeaters 200 are capacitively coupled to the sleeves 64 of the cable.
In the present embodiment, the repeaters 300a and 300b are provided at the ends of the connector-equipped wire 212, respectively, but for example, when an electric field communication module is provided in the peripheral circuit 2, only the repeater 300a may be provided.
The present invention can be implemented in various modifications, adaptations, or variations based on the knowledge of those skilled in the art, without departing from the spirit of the present invention. In addition, any specific matter of the invention may be replaced with another technique within a range where the same operation or effect is produced.
Description of reference numerals
10 … transmission lines, 12, 14 … wires, 12a, 14a … wires, 12b, 14b … insulators, 16 … first connectors, 18 … second connectors, 38 … first electric field communication modules, 40 … second electric field communication modules, 46 … first measurement sections, 48 … decision sections, 50 … second measurement sections, 52 … output sections, 60 … first filters, 62 … second filters, 300 … pair of repeaters, 300a … first repeaters, 300b … second repeaters.
Claims (5)
1. A transmission line including an insulator forming a surface and a conductive wire arranged inside the insulator, comprising:
a pair of electric field communication modules, which are respectively arranged at the first end part and the second end part of the lead and carry out electric field communication by using the insulator as a communication medium; and
and an output unit connected to one of the electric field communication modules and outputting information received by the electric field communication or a result of processing the received information.
2. The transmission line according to claim 1, characterized by comprising:
a first measuring unit that measures a voltage at the first end;
a second measuring unit that measures a voltage at the second end; and
a determination unit that acquires the voltage of the first end portion and the voltage of the second end portion and determines the state of the lead wire based on a potential difference between the voltage of the first end portion and the voltage of the second end portion,
the determination unit acquires the voltage of the second end portion by electric field communication based on the pair of electric field communication modules.
3. The transmission line according to claim 2,
the first measuring section has a first filter for extracting a signal within a specific frequency band generated from the first end section, and measures a voltage at the first end section based on the extracted signal,
the second measurement unit has a second filter that extracts a signal within a specific frequency band generated from the second end, and measures the voltage of the second end based on the extracted signal.
4. A transmission line with a connector is characterized by comprising:
the transmission line of any one of claims 1 to 3; and
and a connector which houses one of the electric field communication modules of the transmission line and an output portion of the transmission line.
5. A relay for relaying a connector provided at a first end of an electric wire or cable having an insulator formed on a surface thereof and a connector provided in a device,
the repeater includes an electric field communication module capacitively coupled to the insulator at the first end,
the electric field communication module performs electric field communication with an electric field communication module provided on a second end side of the electric wire or the cable using the insulator as a communication medium.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-191958 | 2017-09-29 | ||
| JP2017191958 | 2017-09-29 | ||
| PCT/JP2018/036084 WO2019065903A1 (en) | 2017-09-29 | 2018-09-27 | Transmission wire, connector-attached transmission wire, and relay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111149307A true CN111149307A (en) | 2020-05-12 |
| CN111149307B CN111149307B (en) | 2022-07-08 |
Family
ID=65902475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880061994.4A Active CN111149307B (en) | 2017-09-29 | 2018-09-27 | Transmission line, transmission line with connector, and repeater |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7169281B2 (en) |
| CN (1) | CN111149307B (en) |
| WO (1) | WO2019065903A1 (en) |
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|---|---|---|---|---|
| US5712875A (en) * | 1995-06-07 | 1998-01-27 | Compaq Computer Corporation | Asynchronous differential communication |
| JP2008099234A (en) * | 2006-09-11 | 2008-04-24 | Sony Corp | Communication system |
| CN101641888A (en) * | 2007-03-22 | 2010-02-03 | 日本电信电话株式会社 | Electric-field communication device |
| CN101853976A (en) * | 2009-03-30 | 2010-10-06 | 索尼公司 | Communication device and high-frequency coupler |
| CN205160517U (en) * | 2014-11-11 | 2016-04-13 | 日立金属株式会社 | Communication monitoring system |
| JP2017505557A (en) * | 2013-11-06 | 2017-02-16 | エイ・ティ・アンド・ティ インテレクチュアル プロパティ アイ，エル．ピー． | Millimeter wave surface wave communication |
| CN107077779A (en) * | 2014-09-15 | 2017-08-18 | At&T知识产权部有限合伙公司 | Method and apparatus for sensing the situation in electromagnetic transmission medium |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4345850B2 (en) | 2006-09-11 | 2009-10-14 | ソニー株式会社 | Communication system and communication apparatus |
-
2018
- 2018-09-27 CN CN201880061994.4A patent/CN111149307B/en active Active
- 2018-09-27 JP JP2019545642A patent/JP7169281B2/en active Active
- 2018-09-27 WO PCT/JP2018/036084 patent/WO2019065903A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5712875A (en) * | 1995-06-07 | 1998-01-27 | Compaq Computer Corporation | Asynchronous differential communication |
| JP2008099234A (en) * | 2006-09-11 | 2008-04-24 | Sony Corp | Communication system |
| CN101641888A (en) * | 2007-03-22 | 2010-02-03 | 日本电信电话株式会社 | Electric-field communication device |
| CN101853976A (en) * | 2009-03-30 | 2010-10-06 | 索尼公司 | Communication device and high-frequency coupler |
| JP2017505557A (en) * | 2013-11-06 | 2017-02-16 | エイ・ティ・アンド・ティ インテレクチュアル プロパティ アイ，エル．ピー． | Millimeter wave surface wave communication |
| CN107077779A (en) * | 2014-09-15 | 2017-08-18 | At&T知识产权部有限合伙公司 | Method and apparatus for sensing the situation in electromagnetic transmission medium |
| CN205160517U (en) * | 2014-11-11 | 2016-04-13 | 日立金属株式会社 | Communication monitoring system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2019065903A1 (en) | 2020-11-05 |
| JP7169281B2 (en) | 2022-11-10 |
| CN111149307B (en) | 2022-07-08 |
| WO2019065903A1 (en) | 2019-04-04 |
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