JP3470194B2 - Power line exploration equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power line carrier system using a power line as a medium, and an apparatus for checking the communication quality of a power line at the time of construction of a terminal or the like and checking whether or not it can be used for information transmission.

[0002]

2. Description of the Related Art Generally, as a control device for superimposing a control signal on an indoor power line and controlling a load connected to the power line by this control signal, there is one disclosed in Japanese Patent Laid-Open No. 60-200736. This will be described with reference to FIG. 71 is an AC power source, 3 is a power line laid indoors, 7
3 is a central control unit, and 74 is a power line connected to the central control unit.
A current detection unit for inputting a load current signal flowing to the central control unit 73. Reference numerals 75 and 76 denote indoor load control devices having loads 77 and 78, respectively.

Next, the operation of the control device thus constructed will be described. The current flowing through the loads 77, 78 of the indoor load control devices 75, 76 is obtained by the current detector 74 detecting the current flowing through the power line 3.
The central control unit 73 controls the indoor load control device 75 or the indoor load control device 7 according to the current detected by the current detector 74.
A control signal is superimposed on the power line 3 and transmitted to the control unit 6 to control the operating states of the respective loads 77 and 78.

[0004]

In the conventional control device as described above, the central control unit 73 and the indoor load control device 75,
If the laying state of the power line 3 connecting the 76 is clear as shown in the figure, the operation of the device can be performed without any hindrance, but in the actual laying state of the power line 3 indoors, various loads are connected, or in some cases, In many cases, it was complicated, such as a circuit breaker being inserted and branched.
Especially when the control signal is superimposed on the power line, the control signal may not be transmitted if the state of the load connected to the power line is unclear, and the power line is physically divided due to branching by the circuit breaker. In some cases, the control signal could not be transmitted smoothly, and the operation of the device was disabled.

Further, by investigating the laying situation of the actual power line,
It is necessary to install the device after confirming that the control signal can be transmitted reliably. Such an investigation can be performed by confirming the injection and reception of signals between transmission points, but in reality, a measuring instrument or the like will be directly connected to the power line 3 to which an AC power source is applied, Risk of electric shock. It is possible to measure by turning off the power supply as a risk avoidance measure, but it is difficult because a power outage occurs in a building that is in operation, and since the load does not operate, the transmission characteristics of the power line may differ from the actual one. We were unable to evaluate proper transmission.

The present invention has been made to solve the above problems, and when installing equipment using power line carrier, reliably and easily search available indoor power lines,
The purpose of the present invention is to obtain a power line exploration device that grasps the laying status of indoor power lines.

[0007]

[0008]

A power line surveying device according to the present invention, in accordance with a predetermined time,
A signal generator that intermittently generates a test signal of a predetermined type and injects it into the power line, a non-contact coupling means that performs non-contact coupling with the power line, and the non-contact type when the predetermined time is reached. The test signal is detected by the contact coupling means, the detected time and the strength of the detected detection signal are stored, and if the strength of the detected signal is equal to or higher than a predetermined signal strength, it is displayed that signal transmission is possible. And a detection device that displays the intensity of the detection signal corresponding to the time.

Further, according to a predetermined time, a test signal of a predetermined format is intermittently generated, injected into the power line, and a predetermined switching signal is generated when the test signal is intermittent. The signal generator for injecting into the power line, the non-contact coupling means for non-contact coupling with the power line, and the detection signal when detecting the switching signal from the non-contact coupling means And a detection device that stores the strength of the detected detection signal, displays that signal transmission is possible if the strength of the detection signal is equal to or greater than a predetermined signal strength, and displays the detection signal in correspondence with the time. With.

The test signal generated by the signal generator is selectable according to the signal system used for power line carrier.

Further, the signal generator is provided with a non-contact coupling means for non-contactly coupling with the power line and injecting a signal into the power line.

[0012]

A sending control means for controlling the sending of signals based on the output signals of the timer operation switch and the clock means,
It has a signal generating means for intermittently generating a test signal of a predetermined format by the signal selecting means according to a command of the sending control means according to a predetermined time and a signal injection means for injecting the test signal into the power line. When the signal generator, the non-contact coupling means for non-contact coupling with the power line, and the time by the detection clock means for outputting time information after turning on the timer measurement switch become the predetermined time. , Detecting the test signal by the non-contact coupling means, converting the detected test signal into a signal strength, and outputting a signal indicating whether or not the signal can be transmitted by comparing the signal strength with a predetermined signal strength. , The measurement control means for stopping the measurement operation after performing the measurement for the predetermined time, the signal strength and the time of detection It has a storage means for storing, a display for displaying the signal strength corresponding to the detected time, a transmission determination display means for displaying the signal transmission availability by the signal of the signal transmission availability, and a level meter for displaying the signal strength. And a detection device.

Further, sending control means for controlling the sending of signals based on the output signals of the timer operation switch and the clock means,
In response to a command from the sending control means, a signal generating means for intermittently generating a test signal of a predetermined format by the signal selecting means according to a predetermined time, and a switching signal for indicating start or stop of the test are generated. A signal generator having a switching signal generating means, a signal injecting means for injecting the test signal and the switching signal into a power line, a non-contact coupling means for contactlessly coupling with the power line, and a timer for turning on / off a timer measurement. A measuring switch, a detecting clock means for outputting time information, a switching signal detecting means for detecting the switching signal, and a detecting signal when the switching signal indicating the start of the test is detected by the switching signal detecting means. The test start time is set in the clock means, the test signal is detected by the non-contact coupling means, and the detected test signal is detected. Measurement control for converting the signal intensity to a signal intensity, outputting a signal indicating whether or not the signal can be transmitted by comparing the signal intensity with a predetermined signal intensity, and performing measurement for the predetermined time, and then stopping the measurement operation. Means, storage means for storing the signal strength and the detected time,
A detection device having a display unit for displaying the signal strength corresponding to the detected time, a transmission determination display unit for displaying the signal transmission propriety by the signal transmission propriety signal, and a level meter for displaying the signal intensity. .

Further, the signal injection means includes a non-contact coupling means for non-contactly coupling with the power line and injecting a signal into the power line.

[0016]

DETAILED DESCRIPTION OF THE INVENTION

Embodiment 1. In general, the central control unit of equipment is often installed near the power distribution board such as an indoor electric room. Therefore, it is relatively easy to directly connect the signal generator to the power line in the electric room. However, even if there is no equipment such as a distribution board for electrical connection in the vicinity of the equipment to be monitored and even if many candidate points for connecting the power line carrier communication device are selected, the communication quality is the best. It is difficult to directly connect and select points.
The first embodiment has a configuration for conducting a survey from the point near the distribution board to the point where equipment is installed as the point at which communication is performed.

The first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram when an indoor wiring survey is performed using a power line survey device according to a first embodiment of the present invention. 7 is a distribution board, and 3 is a branch in a distribution board by a circuit breaker 2. It is a power line and is wired to the facility 2 to be monitored, lighting, general outlets, etc. to supply power. A signal generator 1 is connected to the power line 3. The power line 3 runs along the inside ceiling, walls, etc.
It is laid as a power source for the facility 5 to be monitored and a power source for electric devices around it. The power line 3 may be the same as or different from the power supply system to which the signal generator 1 is connected. Reference numeral 4 is a detection device that detects a signal generated by the signal generation device 1 from the power line 3 via the coupler 6.

FIG. 2 is a diagram showing an example of the appearance of the signal generator 1. 1a is a signal generation switch for turning on and off the generation of a test signal, and when turned to the on side, the power line connection terminal 1e
The test signal is output to. Turn off the signal generation switch 1a
The test signal stops when it is tilted to the f side. Reference numeral 1c is a signal generating indicator lamp indicating that the test signal is output to the power line connection terminal 1e. Reference numeral 11a is a signal selection means, which selects the format of the test signal according to the signal format used for data communication.

FIG. 3 is a block diagram showing the configuration of the signal generator, and 10 is a sending control means for controlling the sending of a signal, to which the signal generating switch 1a is connected. Reference numeral 11 is a signal generating means for generating a signal having the same frequency distribution as the signal used in the power line carrier, and 11a is a signal generating means 1.
1 selects the type of signal generated. Reference numeral 12 is a signal injection means such as a transformer and a power amplifier having a function of impedance matching with the power line 3 and a signal amplification function.

FIG. 4 is an external view of the detection device 4, 44 is a level meter for displaying the level of the detected test signal, 49, 5
0 determines the level of the currently received test signal,
LED (a) and LED (b) for displaying the determination result, 6 is a coupler which is a non-contact means for performing non-contact coupling by electromagnetically or electrostatically coupling with the power line 3, and the power line In the first embodiment, a clip-type device is shown, which is connected to a strong electric part such as an exposed place in a non-contact manner.

FIG. 5 is a diagram showing the structure of the detection device 4,
Is a measurement control means, and the signal detected by the coupler 6 is input through the amplifier 41. A level meter 44 displays the level of the detected test signal. 49, 50
Is an indicator which is a transmission judgment display means such as an LED for comparing the test signal level being measured at present with a predetermined value and showing the result of the judgment of transmission propriety.

Next, the operation will be described with reference to FIGS. Two lines of power line 3 are laid near the monitored equipment 5.
A method of power line exploration will be described for the case where points a and b are candidates for connection. Here, it is assumed that the control device is installed in the electric room and the control signal is communicated with a remote place indoors, for example, an air conditioner installed on the roof.

First, as shown in FIG. 1, the signal generator 1 is connected to a power line 3 of an arbitrary system in a distribution board 7 of an electric room. This connection point is point c. On the other hand, the detection device 4 is coupled to the power line 3 laid near the facility by using a coupler 6 at either or both of the power line connection candidates a point and b point. At this point, it is not possible to determine which power line should be used to monitor the facility to be monitored, because the condition of laying the power line 3 between points c and a, b is unknown.
Since the coupler 6 performs electromagnetic or electrostatic coupling, it may be connected to only one of the power lines 3.

Next, the signal generation switch 1a of the signal generator 1 shown in FIG.
Inject. The injected test signal is transmitted through the power line 3,
It is transmitted to each system indoors.

Next, the operation of the signal generator 1 will be described with reference to FIG. First, the signal selecting means 11a is set in advance so that a test signal of a predetermined format is output according to the signal format used for data communication. When the signal generation switch 1a is turned on, the sending control means 10 instructs the signal generation means 11 to generate a signal, and the signal transmission display LED
Turn on 1c. From signal generation means 11 to signal selection means 1
The test signal generated in a predetermined format by 1a is amplified to a predetermined intensity by the signal injection means 12 and injected into the power line 3 via the power line connection terminal 1e.

When a signal injected between any two lines is transmitted, the impedance coupled to each line, for example, the capacitance between the ground and the like is not necessarily the same depending on the surrounding environment.
In particular, a cable such as a power cable not intended to be used for communication causes impedance non-parallelism, and as a result, a signal leaks out of the power line cable.

Connection candidate point a or b on the power line 3
Also at the point, if the test signal is transmitted, signal leakage has occurred. The leak signal is detected by the detection device 4 from the points a and b through the coupler 6. Specifically, the test signal received by the coupler 6 shown in FIG. 5 as the leak of the test signal electromagnetically or electrostatically coupled is amplified by the amplifier 41 at a predetermined magnification and input to the measurement control means 40. It

The operation of the detection device 4 will be described below with reference to the flow chart shown in FIG. The measurement control unit 40 refers to the conversion table of the leak signal strength corresponding to the signal strength on the power line, which is built in advance, for the detected test signal (step S1), and converts this into signal strength data (step S2). . The measurement control means 40 displays the signal intensity on the level meter 44 based on the signal intensity data (step S3), and compares it with the comparison data defined in advance in the communicable range (step S4) to compare the signal intensity data. LED (a) when more than data
49 is turned on and LED (b) 50 is turned off (step S
5) Display that transmission is possible. When the signal strength is lower than the comparison data, the LED (b) 50 is turned on and the LED (a) 49 is turned off (step S6) to indicate that transmission is impossible.

According to the above procedure, the points a and b of the power line 3 near the equipment shown in FIG. 1 are investigated, and the connection work of the power line carrier device is carried out at any of the transferable points.

As described above, when the equipment using the power line carrier is installed, the power line laying condition can be surely and easily searched without rebuilding the drawings, and the power source can be searched. It is possible to search in a non-contact manner without connecting a meter or the like directly to the power line to which is applied, and it is possible to avoid the risk of electric shock. Therefore, it is possible to grasp the communication status while the electric equipment is operating without disconnecting the AC power applied to the power line, so that the equipment can be installed with high reliability and the trial run after the equipment is installed. The adjustment period can be shortened.

Embodiment 2. In the second embodiment, the power line search device described in the first embodiment is provided with a timer function to measure the trend by the timer operation. Less than,
A second embodiment of the present invention will be described with reference to the drawings. In addition,
In the figure, the same reference numerals as those in the first embodiment indicate the same or corresponding ones, and the description thereof is omitted. 7 is an external view of a signal generator according to Embodiment 2 of the present invention, FIG. 8 is a signal generator block diagram, FIG. 9 is an external view of a detector, and 10 is a block diagram of the detector.

In FIG. 7, reference numeral 1b is a timer switch for turning on / off the timer operation. When turned on, the signal is stopped for a predetermined period at a predetermined time, and then the test signal is stopped for a predetermined time, and then the test signal is restarted. The operation of outputting is repeated. 1d is a time display.

In FIG. 8, reference numeral 14 is a time measuring means for notifying the time to the sending control means and displaying the present time on the time display means 1d.

In FIG. 9, 45 is a display device for displaying the test signal level at the time of automatic measurement by the timer, 46 is a start switch for starting the timer measurement, 47 is a time series of the test signal levels stored by the timer measurement. This is a clear switch for erasing change (hereinafter abbreviated as trend) information.

In FIG. 10, reference numeral 43 is a time measuring means, which gives time information to the measurement control means 40. Reference numeral 45 is a display means for displaying the detected signal intensity as a trend, 46 is a timer measurement start switch, 47 is a switch for clearing trend data of the test signal level, and 48 is a storage means for holding the time series data of the test signal. .

Next, the operation will be described with reference to FIGS. 7 to 10 and FIG. 11 showing the operation of the signal device 1 and FIG. 12 showing the operation of the inspection device 4. First, after operating the timer operation switch 1b of the signal generating device 1 to the on side, the signal generating switch 1a is operated to the on side. The signal generator 1 starts operating in the timer operation mode. In this mode, the test signal is intermittently injected into the power line 3 according to a predetermined schedule.

The detailed operation will be described below with reference to FIG. 8 and the flowchart of FIG. 11 in which the timer operation of the signal generator 1 is described. The timer operation switch 1b is turned on, and then the signal generation switch 1a is turned on. The sending control means 10 includes a timer operation switch 1b and a signal generation switch 1a.
Is read (step S11) and each switch is turned on.
Is confirmed (steps S12 and S13). Further, the time information is read out from the clock means 14 (step S
14) and waits until a predetermined time (step S1)
5). When the sending control means 10 confirms that the predetermined time has come, it instructs the signal generation means 11 to generate a signal (step S16) and turns on the signal transmission display LED 1c (step S17). The test signal generated from the signal generation means 11 is amplified to a predetermined intensity by the signal injection means 12 and injected into the power line 3 via the power line connection terminal 1e.

When the time further advances and the sending control means 10 detects the passage of a predetermined time (steps S18 and S19), the signal generation means 11 is instructed to stop the signal generation (step S20) and the signal transmission display LED 1c is turned on. The light is turned off (step S21). As described above, the test signal is injected from the signal generator 1 to the power line 3 by the timer switch 1b at a predetermined time and for a predetermined time.

At the connection candidate points a or b on the power line 3, signal leakage occurs when a test signal is transmitted as in the first embodiment. This leak signal is detected by the detection device 4 installed at the points a and b. In the present embodiment, the detection device 4 turns on the timer measurement start switch 46.
The test signal is detected and stored at a predetermined time, the measurement signal is measured for a predetermined time, and then the measurement operation is stopped.

The operation will be described below with reference to FIG. 10 showing the detection device 4 and a flowchart of FIG. 12 showing the timer operation of the measurement control means 40 of the detection device 4. First, in the measurement control means 40, the timer measurement start switch 46 is turned on.
After detecting that it has become (step S30), the time measuring means 4
The time information is read from 3 (step S31), and it is determined that the predetermined time synchronized with the signal generator 1 has been reached (step S32). At this time, by the coupler 6,
The test signal received as a leak of the test signal that is electromagnetically or electrostatically coupled is amplified by the amplifier 41 at a predetermined magnification and input to the measurement control unit 40.

The measurement control means 40 refers to the conversion table of the leak signal intensity corresponding to the signal intensity on the power line, which is constructed in advance for the detected test signal (step S3).
3), converting this into signal strength data (step S3)
4). The measurement control means 40 displays the signal strength on the level meter 44 based on the signal strength data (step S35).
It is also stored in the storage means 48 (step S3).
6). Further, comparison is performed with comparison data defined in advance in the communicable range (step S37), and when the signal strength data is equal to or greater than the comparison data, LED (a)
49 is turned on and LED (b) 50 is turned off (step S3
8) Display that transmission is possible.

Next, when the signal strength is less than the comparison data value, the LED (a) 49 is turned off and the LED (b) 50 is turned on (step S39) to display that transmission is impossible. In addition, as shown in FIG.
Sequential display of signal level trends (step S4)
0).

Next, the measurement control means 40 reads the time information from the time measurement means (step S41), and confirms the passage of a predetermined time (step S42), and then the level meter 44.
And the data storage operation in the storage means 48 is stopped (step S43).

The above operation is repeated every time a predetermined time has elapsed, and the trend of the signal strength on the power line is measured.

Since the electric characteristic of the power line changes in time series depending on the operating condition of the connected electric equipment, the intensity of the control signal transmitted through the power line changes with time. Can be measured,
It becomes possible to know the stability of transmission, and it is possible to select a connection point with higher accuracy.

Embodiment 3. In the third embodiment, the signal generation device 1 of the power line search device described in the first embodiment is provided with a switching signal function, and the trend measurement is performed using the switching signal. The third embodiment of the present invention will be described below with reference to the drawings. In the drawings, the same reference numerals as those in the second embodiment indicate the same or corresponding parts, and the description thereof will be omitted. 13 is a block diagram of a signal generator according to a third embodiment of the present invention, and FIG. 14 is a block diagram of a detector.

In FIG. 13, reference numeral 13 is a switching signal generating means for switching control of test signal transmission in response to a signal from the transmission control means 10, that is, generating control signals indicating start of test signal transmission and stop of test signal transmission. Is.

In FIG. 14, reference numeral 42 denotes a switching signal detecting means, which detects a signal indicating switching of the test signal output from the signals detected by the coupler 6 and amplified by the amplifier 41.

Next, the operation will be described with reference to FIGS. 13 and 14 and FIG. 15 showing the operation of the signaling device 1 and FIG. 16 showing the operation of the inspection device 4. First, after operating the timer operation switch 1b of the signal generating device 1 to the on side, the signal generating switch 1a is operated to the on side. The signal generator starts operating in the timer operating mode. In this mode, a test signal is intermittently injected into the power line 3 according to a predetermined schedule, and a switching signal having the meaning of a test signal transmission before the test signal generation and a switching signal having the meaning of the test signal stop signal later is generated. Send out.

The detailed operation will be described below with reference to the flowcharts showing the timer operation of the signal generator 1 shown in FIGS. 13 and 15. Turn on timer operation switch 1b
(Steps S50, S51), and then the signal generating switch 1a is turned on (step S52), the sending control means 10 reads the time information from the timing means 14 (step S53), and waits until the predetermined time comes. . When the sending control means 10 confirms that the predetermined time has come (step S54), it instructs the switching signal generation means 13 to output a control signal (hereinafter simply referred to as a test start signal) for generating a test signal. (Step S55), the test start signal is amplified to a predetermined intensity by the signal injection means 12 and output to the power line 3 via the power line connection terminal 1e.

Next, after the test start signal is generated, the sending control means 10 instructs the signal generation means 11 to generate a signal (step S56) and turns on the signal transmission display LED 1c (step S57). The test signal generated from the signal generation means 11 is amplified to a predetermined intensity by the signal injection means 12 and injected into the power line 3 via the power line connection terminal 1e. After that, the sending control means 10 sequentially reads the time information from the time counting means 14 (step S58) and monitors the elapse of a predetermined time (step S59).

When the time further advances and the sending control means 10 detects the passage of a predetermined time, the signal generation means 11 is instructed to stop the signal generation (step S60) and the signal transmission display LED 1c is turned off (step S61). next,
The switching signal generating means 13 is instructed to output a control signal indicating that the test signal is stopped (hereinafter simply referred to as a test stop signal) (step S62), and the test stop signal is amplified to a predetermined intensity by the signal injecting means 12. And is output to the power line 3 via the power line connection terminal 1e.

As described above, the test signal is injected from the signal generator 1 to the power line 3 by the timer switch 1b for a predetermined time at a predetermined time, and the test stop signal and the test start signal are transmitted before and after the test signal is transmitted. Are output on the power line 3.

Next, when the test signal is transmitted at the connection candidate points a or b on the power line 3, signal leakage occurs. This leak signal is detected by the detection device 4 installed at the points a and b. In the present embodiment, the detection device 4 is installed with the timer measurement start switch 46 turned on, performs test signal detection and storage, performs a predetermined time measurement, and then repeats the operation of stopping the measurement operation. . At this time, the timing means 43 of the detection device 4 operates so as to be synchronized with the test start signal or the test stop signal.

The operation will be described below with reference to the flowchart of the timer operation of the measurement control means shown in FIGS. First, the timer measurement start switch 46 of the detection device 4 is turned on. (Step S70). Next, the test signal received as a leak of the test signal electromagnetically or electrostatically coupled by the coupler 6 is transmitted to the amplifier 41.
Is amplified by a predetermined magnification and input to the measurement control means 40. When the switching signal detecting means 42 detects a test start signal from the received signals (step S71), the clock means 43 is set to a predetermined measurement start time (step S72).
At the same time, the detected test signal is referred to the leakage signal strength conversion table corresponding to the signal strength on the power line that is built in advance, and this is converted into signal strength data (step S73).

Next, the measurement control means 40 displays the signal strength on the level meter 44 based on the signal strength data (step S74) and stores it in the storage means 48 (step S75). Further, comparison is performed with comparison data set in a communicable range in advance, and when the signal strength data is greater than or equal to the comparison data value, the LED (a) 49 is turned on and L
The ED (b) 50 is turned off (step S77), and a message indicating that transmission is possible is displayed. When the signal strength is less than the comparison data value, the LED (b) 50 is turned on and the LED (a) 4 is turned on.
9 is turned off (step S78), and it is displayed that transmission is impossible. Further, the trend of the signal level is sequentially displayed on the display means 45 as shown in FIG. 4 (step S).
79).

Next, the measurement control means 40 detects the test stop signal from the received signals (step S80), stops the display on the level meter 44, and stops the data storage operation in the storage means 41 (step S81). ).

The above operation is repeated every time a test start / test stop signal is detected, and the trend of the signal strength on the power line is measured.

Since the electric characteristics of the power line change in time series depending on the operating condition of the connected electric equipment, the intensity of the control signal transmitted through the power line changes with time. Can be measured,
It becomes possible to know the stability of transmission, and it is possible to select a connection point with higher accuracy. Moreover, since the timer operation of the signal generator and the detector can be automatically synchronized, the operation can be facilitated.

The test signal used in the tests in the first to third embodiments can be changed according to the signal format used by the equipment using the power line carrier.
Is configured, and is changed by the signal selection means 11a according to the device using the power line carrier, and the power line is evaluated by the exploration procedure of the above embodiment.

Although the signal generator 1 is directly connected to the power line 3 of the distribution board 7 in the first to third embodiments, it is shown in FIG. 17 as means for connecting the signal generator 1 to the power line 3. By using the coupler 6 that is coupled in a non-contact manner as described above, the power line laying condition can be searched by the same procedure as in the first to third embodiments. At this time, the conversion table included in the measurement control means 40 in the detection device 4 needs to be changed according to the signal injection method.

In the first to third embodiments, the method of power line exploration is shown for a pair of power lines. However, any one pair of the three power lines or a signal between the power line and the ground is utilized. Even in the case of a device that performs transmission, the connection of the signal generator 1 can be changed according to the usage status of the power line to search the power line in the same procedure.

[0063]

Since the present invention is constructed as described above, it has the following effects.

[0064]

According to a predetermined time,
A signal generator that intermittently generates a test signal of a predetermined type and injects it into the power line, a non-contact coupling means that performs non-contact coupling with the power line, and the non-contact type when the predetermined time is reached. The test signal is detected by the contact coupling means, the detected time and the strength of the detected detection signal are stored, and if the strength of the detected signal is equal to or higher than a predetermined signal strength, it is displayed that signal transmission is possible. Since the detection device that displays the intensity of the detection signal corresponding to the time is provided, it is possible to perform an investigation using time as a parameter, and it becomes possible to know the stability of transmission, which is used for power line carrier with higher accuracy. You can select the connection point of the device.

Further, according to a predetermined time, a test signal of a predetermined format is intermittently generated, injected into the power line, and a predetermined switching signal is generated when the test signal is intermittent. The signal generator for injecting into the power line, the non-contact coupling means for non-contact coupling with the power line, and the detection signal when detecting the switching signal from the non-contact coupling means And a detection device that stores the strength of the detected detection signal, displays that signal transmission is possible if the strength of the detection signal is equal to or greater than a predetermined signal strength, and displays the detection signal in correspondence with the time. Since it is equipped with and, it is possible to measure with time as a parameter and to know the stability of transmission, and it is more accurate and the connection point of equipment used for power line carrier It is possible to make a choice. Also,
Since the timer operation of the signal generator and the detector can be automatically synchronized, the operation can be facilitated.

Since the test signal generated by the signal generator can be selected according to the signal system used for power line carrier, it is possible to support a wide range of devices for power line carrier.

Further, since the signal generator is provided with the non-contact coupling means for non-contactly coupling with the power line and injecting the signal into the power line, the coupling between the signal device and the power line can be facilitated.

[0069]

Sending control means for controlling the sending of signals based on the output signals of the timer operation switch and the clock means,
It has a signal generating means for intermittently generating a test signal of a predetermined format by the signal selecting means according to a command of the sending control means according to a predetermined time and a signal injection means for injecting the test signal into the power line. When the signal generator, the non-contact coupling means for non-contact coupling with the power line, and the time by the detection clock means for outputting time information after turning on the timer measurement switch become the predetermined time. , Detecting the test signal by the non-contact coupling means, converting the detected test signal into a signal strength, and outputting a signal indicating whether or not the signal can be transmitted by comparing the signal strength with a predetermined signal strength. , The measurement control means for stopping the measurement operation after performing the measurement for the predetermined time, the signal strength and the time of detection It has a storage means for storing, a display for displaying the signal strength corresponding to the detected time, a transmission determination display means for displaying the signal transmission availability by the signal of the signal transmission availability, and a level meter for displaying the signal strength. Since it is equipped with a detection device, it is possible to investigate with time as a parameter and to know the stability of transmission,
It is possible to select a connection point of a device used for power line transportation with higher accuracy.

Further, sending control means for controlling the sending of signals based on the output signals of the timer operation switch and the clock means,
In response to a command from the sending control means, a signal generating means for intermittently generating a test signal of a predetermined format by the signal selecting means according to a predetermined time, and a switching signal for indicating start or stop of the test are generated. A signal generator having a switching signal generating means, a signal injecting means for injecting the test signal and the switching signal into a power line, a non-contact coupling means for contactlessly coupling with the power line, and a timer for turning on / off a timer measurement. A measuring switch, a detecting clock means for outputting time information, a switching signal detecting means for detecting the switching signal, and a detecting signal when the switching signal indicating the start of the test is detected by the switching signal detecting means. The test start time is set in the clock means, the test signal is detected by the non-contact coupling means, and the detected test signal is detected. Measurement control for converting the signal intensity to a signal intensity, outputting a signal indicating whether or not the signal can be transmitted by comparing the signal intensity with a predetermined signal intensity, and performing measurement for the predetermined time, and then stopping the measurement operation. Means, storage means for storing the signal strength and the detected time,
A display device that displays the signal strength corresponding to the detected time, a transmission determination display unit that displays the signal transmission availability by the signal transmission availability signal, and a detection device having a level meter that displays the signal intensity. Therefore, it is possible to perform measurement with time as a parameter, to know the stability of transmission, and to select a connection point of a device used for power line carrier with higher accuracy. Moreover, since the timer operation of the signal generator and the detector can be automatically synchronized, the operation can be facilitated.

Further, since the signal injection means includes the non-contact coupling means for non-contactly coupling with the power line and injecting the signal to the power line, coupling between the signal device and the power line can be facilitated.

[Brief description of drawings]

FIG. 1 is a configuration diagram when an indoor wiring survey is carried out using a power line survey device according to a first embodiment of the present invention.

FIG. 2 is an external view showing the external appearance of the signal generator according to the first embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a signal generator according to the first embodiment of the present invention.

FIG. 4 is an external view showing the external appearance of the detection device according to the first embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a detection device according to the first embodiment of the present invention.

FIG. 6 is a flowchart showing a signal measuring operation of the detecting device according to the first embodiment of the present invention.

FIG. 7 is an external view showing the external appearance of the signal generator according to the second embodiment of the present invention.

FIG. 8 is a block diagram showing a configuration of a signal generator according to a second embodiment of the present invention.

FIG. 9 is an external view showing the external appearance of the detection device according to the second embodiment of the present invention.

FIG. 10 is a block diagram showing a configuration of a detection device according to a second embodiment of the present invention.

FIG. 11 is a flowchart showing a timer operation of the signal generator according to the second embodiment of the present invention.

FIG. 12 is a flowchart showing the timer operation of the measurement control means of the detection device according to the second embodiment of the present invention.

FIG. 13 is a block diagram showing a configuration of a signal generator according to a third embodiment of the present invention.

FIG. 14 is a block diagram showing a configuration of a detection device according to a third embodiment of the present invention.

FIG. 15 is a flowchart showing a timer operation of the signal generator according to the third embodiment of the present invention.

FIG. 16 is a flowchart showing the timer operation of the measurement control means according to the third embodiment of the present invention.

FIG. 17 is a configuration diagram when performing an indoor wiring survey using a power line survey device according to another embodiment of the present invention.

FIG. 18 is a configuration diagram of a control device using conventional power line carrier.

[Explanation of symbols]

1 signal generator, 1a signal generation switch, 1b timer operation start switch, 1c test signal generation display LE
D, 3 power lines, 4 detectors, 5 monitored equipment, 6
Coupler, 11a signal selection means, 14 timing means,
13 switching signal generation means, 40 measurement control means, 4
2 switching signal detection means, 43 timing means, 48 storage means 1, 46 timer measurement start switch, 47 timer measurement data clear switch, 49, 50 transmission judgment display LED.

Front Page Continuation (72) Inventor Ryoichi Ito 2-6-2 Otemachi, Chiyoda-ku, Tokyo Inside Mitsubishi Electric Building Techno Service Co., Ltd. (72) Masaaki Kotake 2-6-2 Otemachi, Chiyoda-ku, Tokyo (56) Reference JP-A-2-162927 (JP, A) JP-A-62-194750 (JP, A) JP-A-9-18579 (JP, A) Actual development Sho-62 −127140 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04B 3/46 H04B 3/54

Claims (7)

(57) [Claims] Follow 1. A predetermined time occurs intermittently the trial No. Kenshin the predetermined format, and a signal generator for injecting a power line, a non-contact coupling means for non-contact coupling with the power line , when a time during which the predetermined, wherein detecting the trial No. Kenshin by non-contact coupling means, stores the intensity of the detected time and the detected detection signal intensity of the detection signal in advance A power line search device comprising: a detection device that displays that signal transmission is possible if the signal intensity is equal to or higher than a predetermined signal intensity and that displays the intensity of the detection signal corresponding to the time. Follow wherein predetermined time occurs intermittently the trial No. Kenshin the predetermined format, when well as injected into the power line of intermittence of the trial No. Kenshin, switching to a predetermined generating a Ri signal, a signal generator for injecting a power line, a non-contact coupling means for non-contact coupling with the power line, when detecting the switching Ri signal from the non-contact coupling means, the No. said trial Kenshin Detects and stores the time of detection and the strength of the detected detection signal, displays that signal transmission is possible if the strength of the detection signal is greater than or equal to a predetermined signal strength, and associates the detection signal with the time. And a display device that displays the power line. 3. A signal generating apparatus attempts Kenshin No. generated in response to signaling for use in a power line carrier, according to any one of claims 1 to 2, characterized in that the selectable Power line survey equipment. 4. The signal generating device according to claim 1, further comprising a non-contact coupling unit that couples with the power line in a non-contact manner and injects a signal into the power line. Power line survey equipment. 5. A sending control means for controlling the sending of a signal based on an output signal of a timer operation switch and a clock means, and a command of the sending control means predetermines a test signal of a predetermined format by the signal selecting means. a signal generating device having a signal injection means for injecting the power line signal generating means and the test signal generated intermittently in accordance with of time, non-contact coupling means for non-contact coupling with the power line, and on the timer measurement switch Time information
Conversions when time by detecting clock means for outputting is, became time the predetermined, by the non-contact coupling means, detects No. trial Kenshin, the trial No. Kenshin detected in signal intensity In addition, the signal strength is compared with a predetermined signal strength, and a signal indicating whether or not the signal can be transmitted is output, and after the measurement is performed for the predetermined time, a measurement control unit that stops the measurement operation, the signal. Storage means for storing the intensity and the detected time, a display for displaying the signal intensity corresponding to the detected time, a transmission determination display means for displaying the signal transmission availability by the signal of the signal transmission availability, and the signal intensity A power line search device, comprising: a detection device having a level meter for displaying. 6. A sending control means for controlling sending of a signal based on an output signal of a timer operation switch and a clock means, and a test signal of a format predetermined by the signal selecting means in advance by a command of the sending control means. Signal generating means intermittently generated according to a predetermined time, switching signal generating means generating a switching signal indicating start or stop of the test, and signal injection means for injecting the test signal and the switching signal into the power line. And a non-contact coupling means for non-contact coupling with the power line, a timer measurement switch for turning on / off the timer measurement, a detection clock means for outputting time information, and a switching signal for detecting the switching signal. The detection means, when the switching signal indicating the start of the test is detected by the switching signal detection means, sets the test start time to the detection clock means. As well as a set, the detecting the signal for the test by non-contact coupling means, converts the detected said <br/> signal for testing the signal strength, signal to the signal strength reaches a predetermined A measurement control means that outputs a signal indicating whether or not the signal can be transmitted in comparison with the intensity, performs measurement for the predetermined time, and then stops the measurement operation,
Storage means for storing the signal strength and the detected time, a display for displaying the signal strength corresponding to the detected time, a transmission determination display means for displaying the signal transmission availability by the signal transmission availability signal, and the signal And a detection device having a level meter for displaying the intensity. 7. The power line exploration device according to claim 5, wherein the signal injection unit includes a non-contact coupling unit that couples with the power line in a non-contact manner and injects a signal into the power line.