CN113740777A

CN113740777A - Line seeking equipment and line seeking method thereof, host and slave

Info

Publication number: CN113740777A
Application number: CN202111043923.1A
Authority: CN
Inventors: 董哲; 苑梦雄; 韩文轩; 王鹏冲
Original assignee: Beijing Baidu Netcom Science and Technology Co Ltd
Current assignee: Beijing Baidu Netcom Science and Technology Co Ltd
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2021-12-03
Anticipated expiration: 2041-09-07

Abstract

The disclosure provides line hunting equipment, a line hunting method thereof, a host and a slave, and relates to the technical field of power grids, in particular to the technical field of power grid detection. The specific implementation scheme is as follows: the wire searching equipment comprises a host and at least one slave, wherein the host and the slave are connected through wireless communication, the host generates a target harmonic signal and injects the target harmonic signal into a power grid to be detected through a first cable terminal, the at least one slave detects a power supply signal of a cable terminal connected with the slave, if the target harmonic signal is detected, a corresponding detection success signal is fed back to the host, and the host determines that the cable terminal and the first cable terminal belong to the same cable. The hunting equipment provided by the embodiment of the disclosure can perform hunting when each cable works normally, and the host and the slave are connected in a communication mode, so that the hunting equipment is not limited by space, and the convenience and operability of the cable hunting are improved.

Description

Line seeking equipment and line seeking method thereof, host and slave

Technical Field

The disclosure relates to the technical field of power grids, in particular to line hunting equipment and a line hunting method thereof in the power grid detection technology.

Background

In industrial power utilization and building power utilization, along with cable laying forming, in the equipment operation, need seek the line to the cable that does not have the line mark.

Disclosure of Invention

The present disclosure provides a hunting apparatus capable of hunting for a cable without a beacon, a hunting method thereof, a master and a slave.

According to an aspect of the present disclosure, there is provided a line seek apparatus including: a master and at least one slave;

the host is electrically connected with a first cable terminal in a power grid to be tested, generates a target harmonic signal and injects the target harmonic signal into the power grid to be tested through the first cable terminal; determining that the target second cable terminal and the first cable terminal belong to the same cable based on a detection success signal fed back by the slave;

and the slave machine is used for being electrically connected with a second cable terminal in the power grid to be detected, detecting a power supply signal of the second cable terminal connected with the slave machine, and feeding back a detection success signal to the host machine if the target harmonic signal is detected, wherein the second cable terminal is a target second cable terminal.

According to another aspect of the present disclosure, there is provided a line seeking method applied to the line seeking apparatus, including:

the host generates a target harmonic signal and injects the target harmonic signal into a power grid to be tested through the first cable terminal;

the slave computer detects a power supply signal of a second cable terminal connected with the slave computer, and if the target harmonic signal is detected, the second cable terminal is a target second cable terminal and feeds a detection success signal back to the host computer;

and the host machine determines that the target second cable terminal and the first cable terminal belong to the same cable based on the detection success signal fed back by the slave machine.

According to another aspect of the present disclosure, there is also provided a master in a seek apparatus, the seek apparatus further including at least one slave, the master including:

the first cable interface is used for electrically connecting the host with a first cable terminal in a power grid to be tested;

the first electrical signal processing module is used for generating a target harmonic signal and injecting the target harmonic signal into a power grid to be tested through the first cable interface and the first cable terminal;

the first signal processing module is used for determining that the target second cable terminal and the first cable terminal belong to the same cable based on a detection success signal fed back by the slave;

the first communication module is used for being in communication connection with each slave machine and receiving a detection success signal fed back by the slave machine; wherein the detection success signal is a detection success signal that is fed back to the master by the slave, after detecting the target harmonic signal, with the second cable terminal as a target second cable terminal.

According to another aspect of the present disclosure, there is also provided a slave in a wire seek apparatus, the wire seek apparatus further including a master, the slave including:

the second cable interface is used for electrically connecting the slave machine with a second cable terminal in the power grid to be tested;

the second electric signal processing module is used for detecting a power supply signal of a second cable terminal connected with the second electric signal processing module to obtain a detected harmonic signal;

the second signal processing module is used for judging whether the detected harmonic signal is a target harmonic signal or not, if the target harmonic signal is detected, the second cable terminal is a target second cable terminal, and a detection success signal fed back to the host is generated; the target harmonic signal is: the host generates and injects the power into a power grid to be tested through the first cable terminal;

and the second communication module is used for feeding back the detection success signal to the host.

It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present disclosure, nor do they limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description.

Drawings

The drawings are included to provide a better understanding of the present solution and are not to be construed as limiting the present disclosure. Wherein:

figure 1 is a schematic structural diagram of a first embodiment of a seek apparatus provided in accordance with the present disclosure;

fig. 2 is a schematic view of a first connection manner of the hunting device and the power grid provided by the present disclosure;

FIG. 3 is an interaction schematic diagram of a first embodiment of a hunting apparatus provided by the present disclosure;

FIG. 4a is an interaction schematic diagram of a second embodiment of the hunting apparatus provided in the present disclosure;

FIG. 4b is a waveform diagram of harmonic signals detected from a slave in an embodiment of the present disclosure;

fig. 5 is a schematic diagram of a second connection manner of the hunting device and the power grid provided by the present disclosure;

FIG. 6 is an interaction schematic diagram of a third embodiment of the hunting apparatus provided in the present disclosure;

FIG. 7 is a flow chart of a first embodiment of a hunting method provided in accordance with the present disclosure;

FIG. 8 is a flow chart of a second embodiment of a hunting method provided in accordance with the present disclosure;

FIG. 9 is a flow chart of a third embodiment of a hunting method provided in accordance with the present disclosure;

figure 10 is a schematic structural diagram of a first embodiment of a host of a seek device provided in accordance with the present disclosure;

FIG. 11 is a schematic structural diagram of a second embodiment of a host of a seek device provided in accordance with the present disclosure;

figure 12 is a schematic structural diagram of a third embodiment of a host of a seek device provided in accordance with the present disclosure;

figure 13 is a schematic structural diagram of a first embodiment of a slave of a hunting apparatus provided in accordance with the present disclosure;

figure 14 is a schematic structural diagram of a second embodiment of a slave of the hunting apparatus provided in accordance with the present disclosure;

figure 15 is a schematic structural diagram of a third embodiment of a slave of the hunting apparatus provided in accordance with the present disclosure;

fig. 16 is a schematic structural diagram of a fourth embodiment of a slave of the hunting apparatus provided in accordance with the present disclosure.

Detailed Description

Exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings, in which various details of the embodiments of the disclosure are included to assist understanding, and which are to be considered as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

In order to improve convenience of cable hunting, the disclosure provides a hunting device and a hunting method thereof, a master and a slave.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a first embodiment of a seek device provided according to an embodiment of the present disclosure, and as shown in fig. 1, the seek device may include a master 110 and at least one slave 120;

the host 110 may be configured to be electrically connected to a first cable terminal in a power grid to be tested, generate a target harmonic signal, and inject the target harmonic signal into the power grid to be tested through the first cable terminal; determining that the target second cable terminal and the first cable terminal belong to the same cable based on a detection success signal fed back by the slave;

the slave 120 may be configured to be electrically connected to a second cable terminal in the power grid to be detected, detect a power signal of the second cable terminal connected thereto, and if the target harmonic signal is detected, feed back a detection success signal to the host by using the second cable terminal as a target second cable terminal.

The line hunting equipment provided by the embodiment of the invention comprises a host machine and at least one slave machine, wherein the host machine and the slave machine are connected through wireless communication, the host machine generates a target harmonic signal and injects the target harmonic signal into a power grid to be detected through a first cable terminal, the at least one slave machine detects a power supply signal of a cable terminal connected with the slave machine, if the target harmonic signal is detected, a corresponding detection success signal is fed back to the host machine, and the host machine determines that the cable terminal and the first cable terminal belong to the same cable. The hunting equipment provided by the embodiment of the disclosure can perform hunting when each cable drives a load to normally work, and power-off hunting is not needed. In addition, the host and the slave are connected in a communication mode, so that the system is not limited by space, can be applied to more scenes, and improves the convenience and operability of cable routing.

Generally, a power grid includes a bus bar, the bus bar is a wire used for collecting and distributing power in the power grid, each cable can be connected with the bus bar, and a power supply can transmit a power signal to each cable through the bus bar and transmit the power signal to a load through each cable, so as to drive the corresponding load to operate.

In practical application, the cable hunting is performed by using the hunting device to confirm whether each cable belongs to the same cable under the condition that manual work cannot distinguish, so that the first cable terminal and the second cable terminal may be different cable terminals.

In the embodiment of the present disclosure, the master and the slave may communicate with each other by using a wireless carrier, and specifically, the master and the slave may communicate by using a wireless communication module disposed inside each of the master and the slave, that is, the slave may send the detection success signal to the master through the wireless communication module, and the master may receive the detection success signal through the wireless communication module.

In the embodiment of the invention, the host and the slaves are communicated through the wireless communication module, so that the space obstruction in the line searching process can be broken, the convenience of line searching is further improved, and the line searching equipment can be suitable for more practical application scenes.

Referring to fig. 2, fig. 2 is a schematic diagram of connection between a master and slaves and cable terminals according to an embodiment of the present disclosure.

As shown in the figure, one end of the master and each slave is grounded, the other end is connected to a different cable terminal, and each slave is connected to the master in a communication manner. Two ends of each cable are respectively connected with the bus and the load, specifically, one cable is connected with the load 1, the other cable is connected with the load 1 ', a power supply can be input into the bus, and the load 1' are driven to work through the bus and the cables. The host machine injects a harmonic signal into the cable through a first cable terminal connected with the host machine, the slave machine 1 and the slave machine 2 detect the harmonic signal at a second cable terminal connected with the slave machine, in the graph 2, the slave machine 1 can detect the harmonic signal, a successful detection signal can be sent to the host machine, and the host machine can determine that the cable terminal connected with the slave machine 1 belongs to the same cable.

Referring to fig. 3, fig. 3 is a schematic diagram of an interaction between a master and a slave in an embodiment of the present disclosure, where the interaction process may include the following steps:

step S310, the host generates a target harmonic signal and injects the target harmonic signal into a power grid to be tested through a first cable terminal connected with the host;

step S320, the slave machine detects a power supply signal of a second cable terminal connected with the slave machine;

step S330, if the slave machine detects the target harmonic signal, determining that the second cable terminal is the target cable terminal;

in this embodiment, the slave machine may generate a corresponding detection success signal after detecting the target harmonic signal.

Step S340, the slave machine sends a detection success signal to the host machine;

in step S350, the host determines that the target second cable terminal and the first cable terminal belong to the same cable.

As an embodiment of the present disclosure, the number of the slave devices may be multiple, and each slave device may be electrically connected to one second cable terminal in the power grid to be tested.

Correspondingly, the host can also obtain the configuration information of the target harmonic signal set by the user and send the configuration information to each slave; after receiving configuration success signals fed back by each slave machine, injecting target harmonic signals into a power grid to be tested; and under the condition that a plurality of target second cable terminals and the first cable terminal belong to the same cable, determining the distance between each target second cable terminal and the first cable terminal based on the sequence of the time information in each detection success signal.

In this way, each slave machine can also generate a configuration success signal to be fed back to the master machine after receiving the configuration information; and adding the time information of the detected target harmonic signal in the detection success signal.

In the embodiment of the present disclosure, a user may set parameters such as a harmonic order and a harmonic amplitude of a harmonic signal to be injected, for example, the harmonic signal may be set to be a 21 th harmonic, and the harmonic amplitude is 1V. The specific harmonic signal is preferably significantly different from the signal in the original grid. Thus, after the target harmonic signal is injected, the slave connected to the same cable as the master can definitely detect the target harmonic signal.

In the embodiment of the present disclosure, the master and the slaves may be respectively provided with a display screen, and a user may input parameters of a target harmonic signal to be injected and configuration information related to communication through the display screen. And the user can see the waveforms of the signals detected by the host and the slaves, the time for detecting the target harmonic signal and other information through the display screen, and can also display the corresponding detection results and the like. Of course, the master and the slave can also communicate with a device through the wireless communication module, the device can be a 5G device with a display screen, and the master and the slave can transmit the information to the device through a wireless carrier, so that a user can set configuration information through the device and see a line-seeking result, and the convenience and the practicability of the line-seeking device in line seeking are further improved.

As described above, after receiving the configuration success information fed back by the slave, the master may inject the harmonic into the cable, and as an embodiment of the present disclosure, the master may remind a user that the harmonic starts to be injected by lighting an indicator lamp or the like when the harmonic is injected, and may send a signal for starting injection to each slave. Each slave computer can start timing after receiving the starting signal, continuously analyze the voltage harmonic signal, and stop timing after detecting the target harmonic signal. After receiving the detection success information fed back by each slave, the master machine can stop injecting the harmonic signal, and determine the distance between the second cable terminal and the first cable terminal connected with each slave machine through the front and back of each time information.

Referring to fig. 4a, fig. 4a is another schematic interaction diagram between a master and each slave in the embodiment of the present disclosure, which may specifically include the following steps:

s401, the host computer obtains configuration information of a target harmonic signal set by a user;

as described above, the user may input the configuration information of the target harmonic signal through the display screen.

S402, the host sends target harmonic signal configuration information to each slave;

after the user inputs the configuration information of the target harmonic signal, the master machine can send the configuration information to each slave machine, so that each slave machine can determine whether the slave machine detects the target harmonic signal or not based on the configuration information.

Step S403, each slave machine generates a configuration success signal;

s404, each slave machine sends a configuration success signal to the host machine;

after receiving the configuration information of the target harmonic signal and configuring the signal receiving parameters, each slave machine can generate a configuration success signal and send the configuration success signal to the host machine through the wireless communication module.

Step S405, the host generates a target harmonic signal, and injects the target harmonic signal into a power grid to be tested through a first cable terminal connected with the host;

after receiving the configuration success information sent by each slave machine, the host machine can inject a target harmonic signal into the cable.

Step S406, each slave machine detects a power supply signal of a second cable terminal connected with the slave machine;

step S407, if the slave machines detect the target harmonic signal, generating a detection success signal containing time information of the detected target harmonic signal;

each slave can compare the waveform of the power supply signal received by each slave with the configuration information of the target harmonic signal to determine whether the target harmonic signal is detected and the time when the target harmonic signal is received. If so, a detection signal including the reception time information is generated.

Step S408, each slave machine sends a detection success signal to the host machine;

step S409, the host machine determines that the target second cable terminal and the first cable terminal belong to the same cable;

step S410, the host determines, based on the sequence of the time information in each detection success signal, the distance between each target second cable terminal and the first cable terminal.

As shown in fig. 4b, fig. 4b is a schematic diagram of the amplitude waveform of the harmonic detected by each slave: in this figure, the master injects a harmonic signal into the cable at time t0, and each slave starts timing from time t 0. Before detecting the harmonic signal, each slave can detect the voltage signal V in the original circuit^*rms. As shown in the figure, the time when the slave 1 detects the harmonic signal is t1, the time when the slave 2 detects the harmonic signal is t2, and t1 is earlier than the time duration t2 Δ t, that is, the slave 1 detects the harmonic signal first, generates a detection success signal and sends the detection success signal to the master, and the slave 2 sends the detection success signal to the master, so that the master can confirm that the distance between the second cable terminal connected to the slave 1 and the first cable terminal is short in the two slaves.

Therefore, in the embodiment of the disclosure, the distance between the corresponding terminal and the first cable terminal can be further determined based on the sequence of the time of the detection success signal fed back by each slave, so that the convenience of cable routing is further improved, and the routing effect is better.

Generally, cables connected to a bus in a power grid are connected in parallel, so that the voltage of a branch to which each cable belongs is generally the same, and if loads in the same operation state exist in each load, line seeking can be performed through the voltage detection mode. In practical applications, the operation conditions of the loads driven by the power supply through the cables may be different, and accordingly, the current signals in the cables may also be different. Therefore, the line-seeking device provided by the embodiment of the disclosure can also support line-seeking based on current, namely, a current detection mode.

Correspondingly, the master machine can also be used for obtaining current synchronous detection time set by a user and sending the current synchronous detection time to each slave machine; when the current synchronous detection time is up, detecting the first power grid current of the first cable terminal to obtain a first current characteristic of the first power grid current; obtaining a second grid current consistent with the first current characteristic based on a second current characteristic fed back by each slave; determining that a target second cable terminal corresponding to a second grid current and the first cable terminal belong to the same cable;

the slave machine can be further configured to detect a second grid current of a second cable terminal connected to the slave machine according to the current synchronization detection time sent by the master machine, obtain a second current characteristic of the second grid current, and feed the second current characteristic back to the master machine.

As described above, generally, the current signal of the power grid includes a harmonic signal, and the harmonic signal generally includes a fundamental wave signal and a harmonic signal, and therefore, the first current characteristic and the second current characteristic described above in the embodiment of the present disclosure may include a fundamental wave characteristic and a harmonic characteristic of the current. In the embodiment of the present disclosure, when detecting whether the first current characteristic is consistent with the second current characteristic, the master may detect whether amplitude phases of a fundamental wave and 9 harmonics with the highest ratio in the received second current characteristic are consistent with those in the first current characteristic, as a specific implementation manner, if a consistency of fundamental wave information reaches 90%, and a consistency of information of 5 harmonics in 9 harmonic information reaches 80%, it may be determined that the two current characteristics are consistent, so that it may be determined that the first cable terminal and the second cable terminal connected to the slave are on the same cable.

Referring to fig. 5, fig. 5 is another schematic connection diagram between a master, a slave, and cables in the embodiment of the present disclosure, a power signal is input to a power grid through a bus, the bus transmits the signal to each cable, fig. 5 shows that three cables connected to the bus drive a load 1, a load 2, and a load 3 to operate, respectively, in this example, the operating states of the load 1, the load 2, and the load 3 may be different. The master machine and the slave machine can be additionally provided with current clamp interfaces and can be connected with the first cable terminal and the second cable terminal through the current clamp interfaces, the master machine and the slave machine respectively detect the current characteristics of the cable terminals connected with the master machine and feed corresponding current characteristics back to the master machine under the condition that the current detection time arrives, the current characteristics detected by the master machine and the slave machine connected as shown in fig. 5 are consistent, and therefore the fact that the cable terminals connected with the master machine and the slave machine are on the same cable can be determined.

As shown in fig. 6, fig. 6 is another schematic interaction diagram between a master and a slave in the embodiment of the present disclosure, which may specifically include the following steps:

step S601, the host computer obtains current synchronous detection time set by a user;

in this embodiment, a user may input the current synchronization detection time through the display screen.

Step S602, the master sends current synchronous detection time to each slave;

the master machine can transmit the current synchronous detection time to each slave machine through the wireless communication module.

Step S603, when the current synchronous detection time is up, the host detects the first power grid current of the first cable terminal to obtain a first current characteristic of the first power grid current;

step S604, each slave machine detects the second power grid current of the second cable terminal connected with the slave machine according to the current synchronous detection time sent by the host machine to obtain a second current characteristic of the second power grid current;

step S605, each slave machine sends each second current characteristic to the master machine;

step S606, the host machine obtains a second power grid current consistent with the first current characteristic based on the second current characteristics fed back by the slave machines; and determining that a target second cable terminal corresponding to the second grid current and the first cable terminal belong to the same cable.

As described above, in the embodiment of the present disclosure, when the load operating states are different, the hunting can be performed by detecting the current signal in each cable, which is a non-intrusive hunting manner, i.e., the load operation is not affected at all, so that the hunting manner of the hunting apparatus is more flexible, and the convenience and operability of the hunting are further improved.

As a specific implementation manner of the embodiment of the present disclosure, the master may be further configured to generate, for each slave, a detection result of whether the second cable terminal connected to the master is the same cable as the first cable terminal; outputting the detection result to a user, and respectively sending the detection result to each slave;

each slave machine can also be used for outputting the detection result of whether the second cable terminal connected with the slave machine is the same cable as the first cable terminal to a user.

In the embodiment of the present disclosure, both the master and the slave may display the hunting detection result to the user through a display screen provided on the device, where the detection result may be represented by displaying "same" or "different" on the screen.

Of course, as a specific implementation manner of the embodiment of the present disclosure, related sound alarm modules may be further disposed on the slave machines and each slave machine, specifically, if the master machine detects that the second cable terminal and the first cable terminal belong to the same cable, a corresponding sound prompt may be issued, for example, an uninterrupted buzzer sound is issued, and after the corresponding slave machine receives the detection success signal sent by the master machine, a corresponding sound prompt may also be issued. If the first cable terminal and the second cable terminal do not belong to the same cable, the host and the slave do not send out alarm prompt sounds.

In the embodiment of the invention, the host and the slave can display the hunting result to the user in a mode of lightening the indicator lamp and the like.

In the embodiment of the disclosure, the detection result can be output to the user through modes such as information display, voice prompt, indicator light and the like, so that the user can obtain the hunting result more intuitively and conveniently, and the user experience is improved.

Therefore, compared with the prior art that the inspection cost is higher due to the single mode of interrupting the power supply and carrying out cable line searching by using a short circuit test gear of a multimeter, and the existing line searching equipment is in wired connection and cannot cross the space, the line searching equipment provided by the disclosure has the advantages of rapid transmission capability of remote signals, no view on space obstacles, capability of coping with more industrial scenes, and suitability for alternating-current and direct-current power utilization scenes; meanwhile, the line seeking detection is supported during the daily work of the load; and the first and last relations of the cable can be judged through the time difference of the received signals of the receivers, so that the position of the cable can be accurately judged.

The embodiment of the present disclosure further provides a line seeking method, which is applied to the line seeking device, as shown in fig. 7, the method may include the following steps:

step S710, generating a target harmonic signal by the host, and injecting the target harmonic signal into a power grid to be tested through the first cable terminal;

step S720, the slave machine detects a power supply signal of a second cable terminal connected with the slave machine, if the target harmonic signal is detected, the second cable terminal is a target second cable terminal, and a detection success signal is fed back to the host machine;

step S730, the host determines that the target second cable terminal and the first cable terminal belong to the same cable based on the detection success signal fed back by the slave.

According to the line searching method provided by the embodiment of the invention, the host generates a target harmonic signal, the target harmonic signal is injected into a power grid to be detected through the first cable terminal, each slave machine detects a power supply signal of the second cable terminal connected with each slave machine, if the target harmonic signal is detected, a corresponding detection success signal is fed back to the host machine, and the host machine determines that the cable terminal and the first cable terminal belong to the same cable. The hunting equipment provided by the embodiment of the disclosure can perform hunting when each cable works normally, does not need to be powered off, and the host and the slave are connected in a communication mode, so that the hunting equipment is not limited by space, and the convenience and operability of the hunting of the cables are improved.

As a specific implementation manner of the embodiment of the present disclosure, on the basis of fig. 7, as shown in fig. 8, before step S710, the method may further include:

step S810, the host computer obtains configuration information of a target harmonic signal set by a user and sends the configuration information to each slave computer;

as described above, the user may input the configuration information through the display screen provided on the host device, in the embodiment of the present disclosure, the display screen of the host may further display the number of currently operating slaves, information of each slave (for example, a connection position of each slave), and the like, so as to further improve the interaction experience between the user and the routing device.

Step S820, after the slave receives the configuration information, a configuration success signal is generated and fed back to the host;

in the embodiment of the invention, if a slave is not successfully configured, namely is not paired with the master, the slave can inform a user by emitting sound with a specific frequency or lighting a related indicator lamp.

After receiving the configuration success signal fed back by each slave, the master may execute step S710 to inject the target harmonic signal into the power grid to be tested.

The step S720 may be further detailed as:

step S721, the slave detects the power signal of the second cable terminal connected to the slave, and if the target harmonic signal is detected, generates a detection success signal including time information of the detected target harmonic signal, and feeds back the detection success signal to the master;

in the case that there are a plurality of target second cable terminals belonging to the same cable as the first cable terminal, the step S730 can be further detailed as follows:

step S731, determining, by the host computer, a distance between each target second cable terminal and the first cable terminal based on the sequence of the time information in each detection success signal; the time information is as follows: and the slave machine detects the time information of the target harmonic signal.

As a specific implementation manner of the embodiment of the present disclosure, on the basis of fig. 7, as shown in fig. 9, the method may further include the following steps:

step S940, the host obtains current synchronous detection time set by a user and sends the current synchronous detection time to each slave; when the current synchronous detection time is up, detecting the first power grid current of the first cable terminal to obtain a first current characteristic of the first power grid current;

step S950, the slave computer detects the second power grid current of the second cable terminal connected with the slave computer according to the current synchronous detection time sent by the host computer to obtain a second current characteristic of the second power grid current, and feeds the second current characteristic back to the host computer;

step S960, the master machine obtains a second grid current consistent with the first current characteristic based on the second current characteristics fed back by each slave machine; and determining that a target second cable terminal corresponding to the second grid current and the first cable terminal belong to the same cable.

In an embodiment of the present invention, the first current characteristic may be: a first power fundamental signal and a harmonic signal of a first grid current at a first cable terminal; the second current characteristic may be: a second power fundamental signal and a harmonic signal of a second grid power at a second cable terminal;

correspondingly, the step of obtaining, by the master, a second grid current consistent with the first current characteristic based on the second current characteristics fed back by the slaves may include:

and the host machine compares the first power fundamental wave signal and the harmonic signal with a second power fundamental wave signal and a harmonic signal fed back by each slave machine under the condition that the power grid currents are the same, and obtains a second power grid current consistent with the first power fundamental wave signal and the harmonic signal.

As described above, if the matching degree of the fundamental wave information reaches 90%, and the matching degree of the information of 5 harmonics among the 9 harmonic wave information reaches 80%, it may be confirmed that the two current characteristics are matched, and it may be determined that the first cable terminal and the second cable terminal connected to the slave are on the same cable.

In the embodiment of the present invention, the master may further generate, for each slave, a detection result indicating whether the second cable terminal connected thereto is the same cable as the first cable terminal; outputting the detection result to a user, and respectively sending the detection result to each slave;

each slave can further output a detection result of whether the second cable terminal connected with the slave is the same cable as the first cable terminal to a user.

As described above, the slave may notify the user of the detection result by displaying a text or making a sound after receiving the detection result sent by the master. In the embodiment of the present disclosure, the display screen of the slave device may further display the electrical information detected by the display device, for example, the waveform of the signal detected by the display device, that is, in the embodiment of the present disclosure, each slave device may also serve as an electric energy quality analyzer, so that a user may intuitively obtain the signal condition at the second cable terminal connected thereto, and may assist the user in performing other related operations.

The detailed description of the embodiments of the method has been given in the apparatus embodiments, and only a brief supplementary description is given here.

As shown in fig. 10, fig. 10 is a schematic structural diagram of a host in a seek device provided in an embodiment of the present disclosure, and may include:

the first cable interface 1010 may be used to electrically connect the host to a first cable terminal in the power grid to be tested;

the first electrical signal processing module 1020 may be configured to generate a target harmonic signal, and inject the target harmonic signal into a power grid to be tested through the first cable interface and the first cable terminal;

in other embodiments of the present disclosure, the first cable interface 1010 may include a voltage sub-interface, and the voltage sub-interface may be configured to electrically connect the host to a first cable terminal in the power grid to be tested;

correspondingly, the first electrical signal processing module 1020 may be configured to generate a target harmonic signal, and inject the target harmonic signal into the power grid to be tested through the voltage sub-interface and the first cable terminal.

The voltage sub-interface described above may be used in a voltage detection mode.

The first signal processing module 1030 may be configured to determine that the target second cable terminal and the first cable terminal belong to the same cable based on a detection success signal fed back from the slave;

the first communication module 1040 may be configured to be communicatively connected to each slave, and receive a detection success signal fed back by the slave; wherein the detection success signal is a detection success signal that is fed back to the master by the slave, after detecting the target harmonic signal, with the second cable terminal as a target second cable terminal.

Based on fig. 10, as shown in fig. 11, the host may further include a first human-machine interaction module 1150,

the first human-machine interaction module 1150 may be configured to obtain configuration information of a target harmonic signal set by a user, and send the configuration information to each slave machine through the first communication module;

in the embodiment of the present disclosure, the first human-computer interaction module may include a display screen, a sound generation module, and the like, and a user may configure device parameters, select functions, configure stylus transformation ratios, and the like through the display screen. The configuration of the device parameters can be related to communication between the configuration host and the configuration slave, the function selection can be selection of a voltage detection mode or a current detection mode, and the stylus transformation ratio configuration can be setting to display the waveform amplitude of the detected signal on the display screen in a magnification or reduction mode by several times.

The first signal processing module 1030 may be further configured to receive, through the first communication module, a configuration success signal fed back by each slave after receiving the configuration information; after receiving configuration success signals fed back by each slave machine, injecting target harmonic signals into a power grid to be tested; under the condition that a plurality of target second cable terminals and the first cable terminal belong to the same cable, determining the distance between each target second cable terminal and the first cable terminal based on the sequence of time information in each detection success signal; the time information is as follows: the slave machine detects time information of a target harmonic signal;

the detection success signal may be a power signal of a second cable terminal connected to the slave device, and if the target harmonic signal is detected, the detection success signal including time information of the detected target harmonic signal is generated and fed back to the master device.

In other embodiments, the first human-machine interaction module 1150 may be further configured to obtain a current synchronization detection time set by a user, and send the current synchronization detection time to each slave machine through the first communication module;

the first electrical signal processing module 1020 may be further configured to detect a first grid current of the first cable terminal when the current synchronization detection time arrives, so as to obtain a first current characteristic of the first grid current;

in other embodiments of the present disclosure, the first cable interface 1010 may further include a current sub-interface, where the current sub-interface may be used to electrically connect the host to a first cable terminal in a power grid to be tested;

the current sub-interface may electrically connect the host with the first cable terminal in a current detection mode.

The first signal processing module 1030 is further configured to obtain a second grid current consistent with the first current characteristic based on a second current characteristic fed back by each slave; determining that a target second cable terminal corresponding to a second grid current and the first cable terminal belong to the same cable; and the second current characteristic is a second current characteristic of a second grid current obtained by detecting the second grid current of a second cable terminal connected with the slave according to the current synchronous detection time by the slave.

In other embodiments, the first signal processing module 1030 may be further configured to generate, for each slave, a detection result of whether the second cable terminal connected thereto is the same cable as the first cable terminal; outputting the detection result to a user through the first human-computer interaction module, and respectively sending the detection result to each slave machine through the first communication module; and each slave further outputs the detection result of whether the connected second cable terminal is the same cable as the first cable terminal to the user.

As described above, the detection result may be output to the user by means of display screen display, voice prompt, indicator light lighting, and the like.

In this embodiment of the present invention, the first communication module 1040 may be: and a wireless communication module.

Referring to fig. 12, fig. 12 is a schematic structural diagram of a host according to an embodiment of the present invention.

As shown in fig. 12, the host includes: an electrical signal sending and receiving conversion module 120 (i.e., the first electrical signal processing module in the embodiment of the present disclosure), a signal processing and calculating module 121 (i.e., the first signal processing module in the embodiment of the present disclosure), a full-duplex wireless communication module 122, and a human-computer interaction and sound alarm module 123.

As shown in fig. 12, the main unit may further include auxiliary components such as a voltage interface 124, a current interface 125, an antenna 126, a function indicator light 127, a power-on button 128, and a lithium battery 129, which are located above the main unit.

In this embodiment, the data can be simultaneously transmitted and received between the host and the slave through the full-duplex wireless communication module 122 and the antenna 126, so that the data transmission efficiency is improved.

As shown in fig. 12, the host may be powered by a lithium battery 129 and controlled to turn on and off by a power-on button 128. The voltage interface 124 may connect the host with the first cable terminal in the voltage detection mode, and the current interface 125 may connect the host with the first cable terminal in the current detection mode. The three function indicator lights 127 of the master machine can be used for indicating that the master machine and the slave machine are successfully matched, indicating that the master machine is injecting a harmonic signal into the power grid and indicating that the master machine and the slave machine are failed to be matched respectively. Of course, the specific functions of the indicator lights can be set according to actual needs, and are only exemplified here.

An embodiment of the present disclosure further provides a slave in the wire searching device, where the wire searching device further includes a master, as shown in fig. 13, the slave may include:

a second cable interface 1310, which may be used to electrically connect the slave with a second cable terminal in the grid under test;

similar to the above-mentioned master structure, the second cable interface in the slave may also include a voltage sub-interface and a current sub-interface, and may electrically connect the slave to the second cable terminal in the voltage detection mode and the current detection mode, respectively.

A second electrical signal processing module 1320, configured to detect a power signal of a second cable terminal connected to the second electrical signal processing module, so as to obtain a detected harmonic signal;

the second signal processing module 1330 may be configured to determine whether the detected harmonic signal is a target harmonic signal, and if the target harmonic signal is detected, the second cable terminal is a target second cable terminal, and generate a detection success signal fed back to the host; the target harmonic signal is: the host generates and injects the power into a power grid to be tested through the first cable terminal;

as described above, the detected harmonic signal may be compared with the fundamental wave signal and the harmonic signal of the target harmonic signal received from the host computer, and the result of whether the detection is successful may be obtained.

In other embodiments, the second signal processing module 1330 may be further configured to receive, through the second communication module, configuration information of a target harmonic signal sent by a host, and generate a configuration success signal to be fed back to the host; adding time information of the detected target harmonic signal in the detection success signal; after the host receives the configuration success signals fed back by the slave machines, the target harmonic signals are injected into the power grid to be tested; and under the condition that a plurality of target second cable terminals and the first cable terminal belong to the same cable, determining the distance between each target second cable terminal and the first cable terminal based on the sequence of the time information in each detection success signal.

The second communication module 1340 may be configured to feed back the detection success signal to the host.

In other embodiments, the second signal processing module 1330 may be further configured to receive, through the second communication module, a current synchronization detection time sent by the host; sending a second current characteristic of a second power grid current obtained by a second electric signal processing module to the host through the second communication module; enabling the master machine to obtain a second grid current consistent with the first current characteristic based on a second current characteristic fed back by each slave machine; determining that a target second cable terminal corresponding to a second grid current and the first cable terminal belong to the same cable;

the second electrical signal processing module 1320 may further be configured to detect a second grid current of the second cable terminal when the current synchronization detection time arrives, so as to obtain a second current characteristic of the second grid current.

Based on fig. 13, referring to fig. 14, the slave may further include a second human-computer interaction module 1450;

the second signal processing module 1330 may be further configured to receive, through the second communication module, the detection result sent by the host; the detection result indicates whether the second cable terminal connected with the detection result is the same cable as the first cable terminal;

the second human-computer interaction module 1450 may be configured to output the detection result to a user.

In the embodiment of the present disclosure, the second communication module may also be a wireless communication module.

Referring to fig. 15, fig. 15 is a schematic structural diagram of a slave according to an embodiment of the present disclosure:

similar to the above-mentioned structure of the master machine, the slave machine may include an electrical signal receiving and converting module 150 (i.e., the second electrical signal processing module in the embodiment of the present disclosure), a signal processing and calculating module 151 (i.e., the second signal processing module in the embodiment of the present disclosure), a full-duplex wireless communication module 152, a human-computer interaction and sound alarm module 153, a voltage interface 154, a current interface 155, an antenna 156, a function indicator light 157, a power-on button 158, and a lithium battery 159. The functions of the modules and components are described in detail in the above embodiments, and are not described again here.

In the technical scheme of the disclosure, the collection, storage, use, processing, transmission, provision, disclosure and other processing of the personal information of the related user are all in accordance with the regulations of related laws and regulations and do not violate the good customs of the public order.

The present disclosure also provides a readable storage medium and a computer program product according to an embodiment of the present disclosure.

FIG. 16 illustrates yet another schematic block diagram of an example electronic device 1600 that can be used to implement embodiments of the present disclosure. The components shown herein, their connections and relationships, and their functions, are meant to be examples only, and are not meant to limit implementations of the disclosure described and/or claimed herein.

As shown in fig. 16, the apparatus 1600 includes a computing unit 1601, which may perform various appropriate actions and processes in accordance with a computer program stored in a Read Only Memory (ROM)1602 or a computer program loaded from a storage unit 1608 into a Random Access Memory (RAM) 1603. In the RAM 1603, various programs and data required for the operation of the device 1600 can also be stored. The computing unit 1601, ROM1602 and RAM 1603 are connected to each other via a bus 1604. An input/output (I/O) interface 1605 is also connected to the bus 1604.

Various components in device 1600 connect to I/O interface 1605, including: an input unit 1606 such as a keyboard, a mouse, and the like; an output unit 1607 such as various types of displays, speakers, and the like; a storage unit 1608, such as a magnetic disk, optical disk, or the like; and a communication unit 1609 such as a network card, a modem, a wireless communication transceiver, etc. A communication unit 1609 allows device 1600 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunications networks.

Computing unit 1601 may be a variety of general purpose and/or special purpose processing components with processing and computing capabilities. Some examples of computing unit 1601 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various computing units running machine learning model algorithms, a Digital Signal Processor (DSP), and any suitable processor, controller, microcontroller, and so forth. The calculation unit 1601 executes the respective methods and processes described above, such as the above-described seek method. For example, in some embodiments, the hunting methods described above may be implemented as a computer software program tangibly embodied in a machine-readable medium, such as storage unit 1608. In some embodiments, part or all of the computer program can be loaded and/or installed onto device 1600 via ROM1602 and/or communications unit 1609. When loaded into RAM 1603 and executed by computing unit 1601, a computer program may perform one or more steps of the above described hunting method described above. Alternatively, in other embodiments, the computing unit 1601 may be configured to perform the above-described hunting method in any other suitable manner (e.g., by way of firmware).

Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, Field Programmable Gate Arrays (FPGAs), Application Specific Integrated Circuits (ASICs), Application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.

Program code for implementing the methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowchart and/or block diagram to be performed. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine or entirely on the remote machine or server.

In the context of this disclosure, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

To provide for interaction with a user, the systems and techniques described here can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user can provide input to the computer. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic, speech, or tactile input.

The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), Wide Area Networks (WANs), and the Internet.

The computer system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server may be a cloud server, a server of a distributed system, or a server with a combined blockchain.

It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present disclosure may be executed in parallel, sequentially, or in different orders, as long as the desired results of the technical solutions disclosed in the present disclosure can be achieved, and the present disclosure is not limited herein.

The above detailed description should not be construed as limiting the scope of the disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A seek apparatus comprising: a master and at least one slave;

2. The hunting apparatus according to claim 1,

the master machine is also used for obtaining configuration information of a target harmonic signal set by a user and sending the configuration information to each slave machine; after receiving configuration success signals fed back by each slave machine, injecting target harmonic signals into a power grid to be tested; under the condition that a plurality of target second cable terminals and the first cable terminal belong to the same cable, determining the distance between each target second cable terminal and the first cable terminal based on the sequence of time information in each detection success signal;

each slave machine is also used for generating a configuration success signal and feeding the configuration success signal back to the host machine after receiving the configuration information; and adding the time information of the detected target harmonic signal in the detection success signal.

3. The hunting apparatus according to claim 1,

the master machine is also used for obtaining current synchronous detection time set by a user and sending the current synchronous detection time to each slave machine; when the current synchronous detection time is up, detecting the first power grid current of the first cable terminal to obtain a first current characteristic of the first power grid current; obtaining a second grid current consistent with the first current characteristic based on a second current characteristic fed back by each slave; determining that a target second cable terminal corresponding to a second grid current and the first cable terminal belong to the same cable;

the slave machine is further used for detecting the second power grid current of the second cable terminal connected with the slave machine according to the current synchronous detection time sent by the master machine to obtain a second current characteristic of the second power grid current, and feeding the second current characteristic back to the master machine.

4. The hunting apparatus according to any one of claims 1 to 3,

the master is further used for generating a detection result of whether the second cable terminal connected with the slave is the same as the first cable terminal or not for each slave; outputting the detection result to a user, and respectively sending the detection result to each slave;

each slave is also used for outputting the detection result of whether the second cable terminal connected with the slave is the same cable as the first cable terminal to a user.

5. The hunting apparatus according to any one of claims 1 to 3,

the host and the slave are communicated through the wireless communication modules arranged respectively.

6. A seek method applied to the seek apparatus of claim 1, comprising:

7. The method of claim 6, wherein,

before the step of generating a target harmonic signal by the host and injecting the target harmonic signal into the power grid to be tested through the first cable terminal, the method further comprises the following steps:

the method comprises the steps that a host computer obtains configuration information of a target harmonic signal set by a user and sends the configuration information to each slave computer; after receiving the configuration information, the slave computer generates a configuration success signal and feeds the configuration success signal back to the host computer;

after receiving the configuration success signals fed back by the slave machines, the host machine injects target harmonic signals into a power grid to be tested;

the method comprises the following steps that the host machine determines that a target second cable terminal and a target first cable terminal belong to the same cable based on a detection success signal fed back by the slave machine, and the method comprises the following steps:

under the condition that a plurality of target second cable terminals and the first cable terminal belong to the same cable, the host machine determines the distance between each target second cable terminal and the first cable terminal based on the sequence of time information in each detection success signal; the time information is as follows: and the slave machine detects the time information of the target harmonic signal.

8. The method of claim 6, further comprising:

the master machine obtains current synchronous detection time set by a user and sends the current synchronous detection time to each slave machine; when the current synchronous detection time is up, detecting the first power grid current of the first cable terminal to obtain a first current characteristic of the first power grid current;

the slave computer detects the second power grid current of the second cable terminal connected with the slave computer according to the current synchronous detection time sent by the host computer to obtain a second current characteristic of the second power grid current, and feeds the second current characteristic back to the host computer;

the master machine is used for obtaining a second power grid current consistent with the first current characteristic based on the second current characteristic fed back by each slave machine; and determining that a target second cable terminal corresponding to the second grid current and the first cable terminal belong to the same cable.

9. The method of claim 8, wherein

The first current characteristic is: a first power fundamental signal and a harmonic signal of a first grid current at a first cable terminal; the second current characteristic is: a second power fundamental signal and a harmonic signal of a second grid power at a second cable terminal;

the master machine, based on the second current characteristics fed back by each slave machine, obtains a second grid current consistent with the first current characteristics, and the step includes:

10. The method of claims 6-9, further comprising:

the master further generates a detection result of whether the second cable terminal connected with the master is the same as the first cable terminal for each slave; outputting the detection result to a user, and respectively sending the detection result to each slave;

and each slave further outputs the detection result of whether the second cable terminal connected with the slave is the same cable as the first cable terminal to a user.

11. A master in a seek apparatus, the seek apparatus further comprising at least one slave, the master comprising:

12. The host of claim 11, further comprising: a first human-computer interaction module;

the first human-computer interaction module is used for obtaining configuration information of a target harmonic signal set by a user and sending the configuration information to each slave machine through the first communication module;

the first signal processing module is further configured to receive, through the first communication module, a configuration success signal fed back by each slave after receiving the configuration information; after receiving configuration success signals fed back by each slave machine, injecting target harmonic signals into a power grid to be tested; under the condition that a plurality of target second cable terminals and the first cable terminal belong to the same cable, determining the distance between each target second cable terminal and the first cable terminal based on the sequence of time information in each detection success signal; the time information is as follows: and the slave machine detects the time information of the target harmonic signal.

13. The host according to claim 12, wherein,

the first human-computer interaction module is further used for obtaining current synchronous detection time set by a user and sending the current synchronous detection time to each slave machine through the first communication module;

the first electric signal processing module is further used for detecting the first power grid current of the first cable terminal when the current synchronous detection time is up to obtain a first current characteristic of the first power grid current;

the first signal processing module is further configured to obtain a second grid current consistent with the first current characteristic based on a second current characteristic fed back by each slave; determining that a target second cable terminal corresponding to a second grid current and the first cable terminal belong to the same cable; and the second current characteristic is a second current characteristic of a second grid current obtained by detecting the second grid current of a second cable terminal connected with the slave according to the current synchronous detection time by the slave.

14. The host according to any one of claims 11 to 13,

the first signal processing module is further configured to generate, for each slave, a detection result of whether the second cable terminal connected thereto is the same cable as the first cable terminal; outputting the detection result to a user through the first human-computer interaction module, and respectively sending the detection result to each slave machine through the first communication module; and each slave further outputs the detection result of whether the connected second cable terminal is the same cable as the first cable terminal to the user.

15. The host according to any one of claims 11 to 13,

the first communication module is: and a wireless communication module.

16. A slave in a seek apparatus, the seek apparatus further comprising a master, the slave comprising:

17. The slave of claim 16, wherein,

the second signal processing module is further configured to receive, through the second communication module, configuration information of a target harmonic signal sent by a host, generate a configuration success signal, and feed back the configuration success signal to the host; adding time information of the detected target harmonic signal in the detection success signal; after the host receives the configuration success signals fed back by the slave machines, the target harmonic signals are injected into the power grid to be tested; and under the condition that a plurality of target second cable terminals and the first cable terminal belong to the same cable, determining the distance between each target second cable terminal and the first cable terminal based on the sequence of the time information in each detection success signal.

18. The slave of claim 16, wherein,

the second signal processing module is further configured to receive, through the second communication module, current synchronization detection time sent by the host; sending a second current characteristic of a second power grid current obtained by a second electric signal processing module to the host through the second communication module; enabling the master machine to obtain a second grid current consistent with the first current characteristic based on a second current characteristic fed back by each slave machine; determining that a target second cable terminal corresponding to a second grid current and the first cable terminal belong to the same cable;

and the second electric signal processing module is further used for detecting the second power grid current of the second cable terminal when the current synchronous detection time is up to obtain a second current characteristic of the second power grid current.

19. The slave according to any one of claims 16 to 18, further comprising: a second human-computer interaction module;

the second signal processing module is further configured to receive, through the second communication module, a detection result sent by the host; the detection result indicates whether the second cable terminal connected with the detection result is the same cable as the first cable terminal;

and the second human-computer interaction module is used for outputting the detection result to a user.

20. The slave according to any one of claims 16 to 18,

the second communication module is: and a wireless communication module.