JP2005326223A - Connection checker of optoelectric composite cable, and its connection inspection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection checker in an optoelectric composite cable for inspecting the optoelectric continuity of the optoelectric composite cable by a single inspection apparatus, dispensing with the interposition of a harness for inspection, reducing inspection time, and dispensing with a preliminary inspection, and to provide a method for inspecting the connection of the connection checker. <P>SOLUTION: A light signal for inspection from a light-emitting element 3 at a light output section 1a is outputted to the optical fiber of the optoelectric composite cable 15, and the light signal propagated through the optical fiber is received by a light receiving element 9 at a light input section 1c. An arithmetic circuit 12 compares the quantity of received light by the light receiving element 4 for monitoring with that by the light receiving element 9 for inspecting the continuity of the optical fiber. An electric signal for inspection from an electric signal generation circuit 8 at an electric signal output section 1b is outputted to an electric wire in the optoelectric composite cable 15, and an electric signal through the electric wire is detected by an electric signal detection circuit 10 at the electric signal input section 1d, thus inspecting the continuity of the electric wire. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a connection checker for an optical / electrical composite cable, which can simultaneously check the continuity of an optical fiber and an electric wire of an optical / electrical composite cable, and can shorten a connection inspection time, and a connection inspection method thereof.

  9 (a), (b), (c), and FIGS. 10 (a), (b) show a conventional optical / electrical composite cable connection checker and its connection inspection method. The continuity confirmation and the electrical continuity confirmation by the electrical continuity checker are performed separately.

  FIG. 9A shows a conventional optical fiber tester 38 for confirming light conduction, a light emitting element 31 such as a laser diode for generating an optical signal, an LD driver 32 for driving the light emitting element 31, and a power source for each part. A power supply circuit 33 for supplying light, a light receiving element 34 such as a photodiode for receiving an optical signal, an A / D conversion circuit 35 for A / D converting an output signal of the light receiving element 34, and an output of the A / D conversion circuit 35 A calculation circuit 36 for performing a predetermined calculation based on the calculation circuit 36 and a display circuit 37 for performing a display based on the calculation of the calculation circuit 36. Single-fiber optical connectors 38a and 38b are provided at one end of a housing (not shown) for housing these. Have.

  FIGS. 9B and 9C show a light continuity inspection method using the conventional optical fiber tester 38 of FIG. 9A.

  9B, inspection harnesses 41A and 41B having optical / electrical composite connectors 40A and 40B at one end and single-core optical connectors 39a and single-core electrical connectors 39b at the other end are prepared. The optical / electrical connectors 40A and 40B of the inspection harnesses 41A and 41B are connected to each other, and the single optical connectors 39a are connected to the single optical connectors 38a and 38b of the optical fiber tester 38.

In this state, the light emitting element 31 is driven by the LD driver 32 to output an optical signal (continuous light) from the light emitting element 31, and the light receiving element 34 receives the light via the inspection harnesses 41A and 41B. The output of the light receiving element 34 that has received the optical signal is converted into a digital value by the A / D conversion circuit 35, and the value is stored in a memory (not shown) of the arithmetic circuit 36. The value stored in this memory is P ⁰ .

  Next, in FIG. 9C, the optical / electrical connectors 15A, 15B of the optical / electrical composite cable 15 to be inspected are connected to the optical / electrical connectors 40A, 40B of the inspection harnesses 41A, 41B.

In this state, an optical signal is output from the light emitting element 31, and is received by the light receiving element 34 via the inspection harness 41A, the optical / electrical composite cable 15, and the inspection harness 41B. The output of the light receiving element 34 is converted into a digital value by the A / D conversion circuit 35, and the value is stored in the memory of the arithmetic circuit 36. The value to be stored in the memory and P ^1.

The arithmetic circuit 36 calculates the loss P of the optical / electrical composite cable 15 by the following calculation.
P = P ¹ −P ⁰ (dB)

  When P is larger than a predetermined value, the light conduction is poor. When P is smaller than the predetermined value, it is determined that the light conduction is good, and the result is displayed by the display circuit 37.

  FIGS. 10A and 10B show a conventional electrical continuity checker 45 and an electrical continuity confirmation method using the same.

  In FIG. 10A, a conventional electrical continuity checker 45 has single-core electrical connectors 45a and 45b at one end of a housing (not shown), a power circuit 42 in the housing, and a detection circuit 43 that detects continuity. And a display circuit 44 for turning on the light emitting diode or operating the buzzer based on the detection signal of the detection circuit 43.

  In FIG. 10B, the optical / electrical composite cable 15 is connected between the inspection harnesses 41A and 41B and the single-core electrical connectors 45a and 45b of the electrical continuity checker 45 are used for inspection as in FIG. 9C. The single-core electrical connectors 39b of the harnesses 41A and 41B are connected.

  In the above configuration, when the power supply circuit 42 applies a voltage to the optical / electrical composite cable 15 via the inspection harnesses 41A and 41B, an electric current flows through the electric / electrical composite cable, which is detected by the detection circuit 43. The The detection result confirms electrical continuity and displays it on the display circuit 44.

  When the optical / electrical composite cable 15 has a plurality of optical fibers and electric wires, the continuity test can be completed by repeating the above operation for the number of core wires.

  FIG. 11 shows an OTDR (Optical Time Domain Reflectmeter), which is a conventional optical fiber connection inspection device, which combines an LD light source 49 that outputs an optical signal and an optical signal into a terminal portion 54a of the optical fiber 54. 54, an optical directional coupler 50 for inputting the backscattered light 54 to the detector 53, an amplifier 52 for amplifying the backscattered light detected by the detector 53, and a light obtained by processing the backscattered light amplified by the amplifier 52. A signal processing device 51 that detects the presence or absence of a defect in the fiber 54 is included. Here, the optical signal is an optical pulse.

  In the above configuration, the backscattered light that is backscattered at each position of the optical fiber 54 includes Rayleigh scattered light unique to the material of the optical fiber 54, Fresnel reflected light from the connection portion and break point, and the like. Then, the reflected light or the like is detected by the detector 53, and the detection result is processed by the signal processing device 51, thereby conducting a continuity test of the optical fiber 54.

  FIG. 12 shows a conventional optical tester, which includes a photoelectric conversion circuit 53 having a light receiving element 53A disposed opposite to a light projecting optical fiber 51 such as a light control device, and an amplification circuit 54 in the photoelectric conversion circuit 53. An A / D conversion circuit 55 connected via the control circuit 56, a control circuit 56 composed of, for example, a CPU connected to the A / D conversion circuit 55, a display circuit 65, an oscillation circuit 63 connected to the control circuit 56, and An external operation circuit 64, a timing generation circuit 57 connected to the photoelectric conversion circuit 53 and the oscillation circuit 63, a delay circuit 58 connected between the timing generation circuit 57 and the A / D conversion circuit 55, and a control circuit The light emission level setting circuit 62 connected to 56, the light emission control circuit 61 connected to the light emission level setting circuit 62 and the control circuit 56, the light emission control circuit 61, and the timing generator A light emitting circuit 59 connected to the circuit 57 and the oscillation circuit 63 and having a light emitting element 59A disposed opposite to the light receiving optical fiber 52, such as the light control device, receives the power supply voltage V, and controls the control voltages V1 and V2. The control voltage V2 of the power supply circuit 66 is applied to the amplifier circuit 54, the A / D conversion circuit 55, and the delay circuit 58, and the control voltage V1 is applied to the other circuits.

  This optical tester can be used in various ways, and includes a light projecting optical fiber 51 that outputs a light signal from a light projecting unit such as a light control device, and a light receiving light that inputs a light signal to the light receiving unit of the light control device. This optical tester is connected to the fiber 52.

Here, a case where an optical signal from a light projecting unit such as a light control device is continuous light will be described. The continuous light signal from the light projecting unit is projected from the light projecting optical fiber 51, received by the light receiving element 53A, and an electric signal proportional to the intensity of the received light signal is output from the photoelectric conversion circuit 53. This output signal is amplified by the amplifier circuit 54, A / D converted by the A / D conversion circuit 55, and input to the control circuit 56. The control circuit 56 processes this signal and displays the intensity of the received light signal from the display circuit 65. At the same time, the output signal from the amplifier circuit 54 is input to the timing generation circuit 57. The timing generation circuit 57 outputs a signal “H ₁ ” when the magnitude of the signal exceeds a set threshold value. “H ₁ ” is input to the light emitting circuit 59 and projects a continuous optical signal from the light emitting element 59A to the light receiving optical fiber 52 of the light receiving unit such as a light control device (see Patent Document 1).

FIG. 13 shows a conventional multi-cable checker, which has a signal sending unit 71, a multi-cable 72 to be measured, and a signal receiving unit 73. The connection state of each single line of the multi-cable 72 is normal, broken, or miswired. And whether or not there is a short circuit. In this cable checker, a signal sent from the sending side CPU 81 is inputted to one single line of the sending terminal portion 83 by the first selector 82, and is outputted from the receiving terminal portion 91 to the receiving side CPU 93 via the second selector 92. (Patent Document 2).
Japanese Patent Laid-Open No. 6-129905 JP 2000-241480 A

  However, according to the optical fiber tester, electric wire continuity checker, OTDR, optical tester, and multi-cable checker described above, it is used exclusively for optical continuity inspection or electrical continuity inspection. Two types of inspection devices were required to inspect the continuity of the cable.

  In addition, since each of the devices described above has a versatile single-core connector, the optical / electrical composite connector of the optical / electrical composite cable cannot be directly connected to the single-core connector. It was necessary to interpose an inspection harness to be converted.

  In addition, according to the optical fiber tester, optical tester, and wire continuity checker described above, optical / electrical composite cables have a structure in which a plurality of optical fibers and a plurality of wires are twisted together. The optical connector must be inspected one by one for the number of cores of the optical / electrical composite cable by replacing the optical connector side with an inspection device. When the optical / electrical composite cable is already laid, the cable end is separated. As a result, inspection devices are arranged at both terminals, and it is necessary to inspect which core is to be inspected while communicating between both terminals.

  Further, according to the optical fiber tester described above, it is necessary to measure the output light amount when the inspection object is not connected by connecting the output-side and input-side inspection harnesses before the inspection. Further, the measurement of the output light quantity before the inspection has to be performed frequently because the output of the light emitting element varies depending on the temperature and time, and it takes an inspection time.

  Accordingly, an object of the present invention is to provide an optical / electrical composite cable connection checker and a connection inspection method thereof capable of inspecting optical continuity and electrical continuity of the optical / electrical composite cable with a single inspection device. is there.

  Another object of the present invention is to provide an optical / electrical composite cable connection checker that does not require an inspection harness for changing the connector shape, and a connection inspection method thereof.

  Another object of the present invention is to provide an optical / electrical composite cable connection checker and a connection inspection method thereof that can shorten the inspection time.

  Another object of the present invention is to provide an optical / electrical composite cable connection checker that does not require a preliminary inspection before the inspection, and a connection inspection method thereof.

In order to achieve the above object, the present invention provides a light input to an optical / electrical composite cable having a cable core formed by twisting a plurality of optical fibers and a plurality of electric wires, and having optical / electrical composite connectors at both ends. An output unit for outputting signals and electrical signals;
An input unit for inputting the optical signal and the electrical signal output from the optical / electrical composite cable;
An arithmetic unit that calculates a level difference between the optical signal output by the output unit and the optical signal input by the input unit;
A display unit that performs a predetermined display according to the output of the calculation unit,
The output unit includes an optical / electrical composite connector connected to the optical / electrical composite connector at one end of the optical / electrical composite cable, an optical signal output unit that outputs the optical signal, and an electrical that outputs the electrical signal. And a signal output unit,
The input unit includes the optical / electrical composite connector at the other end of the optical / electrical composite cable, an optical signal input unit that inputs the optical signal, and an electrical signal input unit that inputs the electrical signal,
The display unit displays an inspection result of the connection of the plurality of optical fibers according to the level difference, and an inspection result of the connection of the plurality of electric wires according to the level of the electric signal input to the electric signal input unit. Provided is an optical / electrical composite cable connection checker characterized by displaying.

  In the present invention, the optical signal output unit includes: a light emitting element that generates the optical signal; a light receiving element that receives the optical signal of the light emitting element and outputs a monitor current; and a variation in the monitor current of the light receiving element. The monitor current conversion efficiency cancellation circuit for canceling, the A / D conversion circuit for A / D converting the output of the monitor current conversion efficiency cancellation circuit and outputting it to the arithmetic circuit, and the output of the monitor current conversion efficiency cancellation circuit An LD driver that inputs and outputs a drive signal to the light emitting element;

  The optical signal input unit includes a light receiving element that receives the optical signal and outputs a monitor current, a monitor current conversion efficiency cancellation circuit that cancels variation in the monitor current of the light receiving element, and the monitor current conversion efficiency cancellation circuit It is preferable to have an A / D conversion circuit that performs A / D conversion on the output of the output to the arithmetic circuit.

  In the present invention, the optical / electrical composite connector of the output unit and the optical / electrical composite connector of the input unit are preferably configured as a single common optical / electrical composite connector.

In the present invention, the optical / electrical composite connector of the output unit has a first optical connector and a first electrical connector on the output unit side,
The optical signal output unit has a second optical connector connected to the first optical connector,
The optical / electrical composite connector of the input unit has a third optical connector and a third electrical connector on the input unit side,
The optical signal input unit has a fourth optical connector connected to the third optical connector,
The electrical signal input unit preferably includes a fourth electrical connector connected to the third electrical connector.

In the present invention, the arithmetic circuit has a configuration that outputs an arithmetic signal calculated based on an A / D conversion signal input from the A / D conversion circuit of the optical signal output unit to the LD driver,
The LD driver preferably has a configuration for driving the light emitting element based on the arithmetic signal and outputting a light emission amount monitor notification signal.

  In the present invention, it is preferable that the optical signal output unit and the electrical signal output unit each include a plurality of optical signal output units and electrical signal output units arranged in parallel.

  In the present invention, the arithmetic circuit is an optical / electrical composite based on outputs of the first arithmetic circuit that outputs the arithmetic signal and the optical signal input unit that receives the optical signal and the light emission amount monitor notification signal. It is preferable to have the 2nd arithmetic circuit which determines conduction | electrical_connection of the optical fiber of a cable.

  In order to achieve the above object, the present invention provides an optical / electrical signal generation stage for generating an optical signal and an electrical signal,

  An optical / electrical signal output stage for outputting the optical signal and the electrical signal to one end of the optical / electrical composite cable via the optical / electrical composite connector;

  An optical / electrical signal input step for inputting the optical signal and the electric signal propagated through the optical / electrical composite cable from the other end of the optical / electrical composite cable or from the one end via an optical / electrical composite connector;

  The optical / electrical composite cable based on the calculation result of the level difference of the optical signal between the optical / electrical signal output stage and the optical / electrical signal input stage, and the detection result of the electrical signal in the optical / electrical signal input stage A connection inspection method for optical and electrical composite cables, comprising a connection inspection stage for performing a connection inspection.

  In the present invention, the optical / electrical signal input step includes a step of inputting the optical signal and the electric signal folded in the middle of the optical / electrical composite cable from the one end through a common optical / electrical composite connector. It is preferable.

  In the present invention, the optical / electrical signal output step prepares a first connection checker including an output unit that outputs the optical signal and the electrical signal, and an input unit that inputs the optical signal and the electrical signal. And connecting the output portion of the first connection checker to the one end of the optical / electrical composite cable,

  The optical / electrical signal input step includes a step of preparing a second connection checker including an output unit that outputs the optical signal and the electrical signal, and an input unit that inputs the optical signal and the electrical signal; It is preferable to include a step of connecting the input portion of the second connection checker to the other end of the optical / electrical composite cable.

According to the present invention, the following effects can be obtained.
(1) A continuity test of light and electricity can be performed by a single inspection device.
(2) The inspection time can be shortened.
(3) The optical and electrical continuity test can be performed without depending on the type of connector of the optical / electrical composite cable.
(4) Since the optical / electrical composite cable is already installed, the continuity test of light and electricity can be performed without taking time even if both terminals are separated.
(5) Even if the optical / electrical composite cable is a multi-core cable, the optical and electrical continuity test can be performed without changing the connector connection.
(6) The preparatory work before the optical and electrical continuity test can be reduced and the preparation time can be shortened.

  FIG. 1 shows an optical / electrical composite cable connection checker according to a first embodiment of the present invention, which includes an output unit 14A, an input unit 14B, a power supply circuit 11, an arithmetic circuit 12, and a display circuit 13. The output unit 14A includes an optical signal output unit 1a and an electrical signal output unit 1b, and the input unit 14B includes an optical signal input unit 1c and an electrical signal input unit 1d.

  The optical signal output unit 1a includes an optical transmission module 34 including a light emitting element 3 that outputs an optical signal and a monitor light receiving element 4 that monitors the optical signal, a monitor current conversion efficiency cancellation circuit 5A, an LD driver 6, and an A / D conversion circuit 7A. The electric signal output unit 1b includes an electric signal generation circuit 8 for electric wire inspection. The optical signal and electric signal of each output part 1a, 1b are output from the optical / electrical composite connector 1 to the optical / electrical composite cable 15 via the optical / electrical composite connector 15a provided at one end of the optical / electrical composite cable 15. The

  The A / D conversion circuit 7A of the optical signal output unit 1a is a circuit that converts an analog electric signal into a digital electric signal, and the LD driver 6 is a circuit that supplies a drive signal obtained by voltage / current conversion to the light emitting element 3. The monitor current conversion efficiency cancel circuit 5A is a cancel circuit that cancels the optical / electrical conversion variation of the light receiving element 4 and outputs a constant output voltage without variation for a certain light emission level.

  The optical signal input unit 1c includes a light receiving element 9 that receives an optical signal input via the optical / electrical composite connector 15b at the other end of the optical / electrical composite cable 15 and the optical / electrical composite connector 2 of the input unit 14B, and a monitor. A current conversion efficiency cancellation circuit 5B and an A / D conversion circuit 7B are included. The electric signal input unit 1d includes an electric signal detection circuit 10 for electric wire inspection.

  The arithmetic circuit 12 includes an FPFA / PLD that calculates an optical loss amount from the output signal of the A / D conversion circuit 7A and the output signal of the A / D conversion circuit 7B, and the display circuit 13 includes the arithmetic circuit 12. Display based on the calculation result of.

  Here, the inspection object is an optical / electrical composite cable 15 for broadcasting, and there are several types that are also standardized in the interconnection standard BTA S-1005B of high-definition television studio equipment. There is a type in which two optical fibers, four power lines, and two control lines are gathered and twisted together and a shield and a jacket are applied.

  As optical / electrical composite connectors 1, 2, 15a, 15b, optical and electrical composite OPS24XX series (Tajimi Radio Co., Ltd.), 3K. The 93C series (LEMO) is used. The optical / electrical composite cable 15 is mainly used for relaying high-definition television broadcasting, and is widely used in broadcasting studios, cameras, outdoor relay points, and relay vehicles.

  Next, the optical fiber connection inspection will be described.

  In FIG. 1, the optical signal for inspection is output from the optical transmission module 34 and sent to the optical / electrical composite connector 1. The optical transmission module 34 selects a laser diode (LD) with an output wavelength of 1.31 μm with a monitor photodiode (PD) 4, and the optical / electrical composite connector 1 is connected to the optical / electrical composite connector 15 a of the optical / electrical composite cable 15. What can be connected is used.

  The monitor-PD-equipped optical transmission module 34 has a PD 4 disposed therein, and monitors the light emission amount of the light-emitting element 3 and outputs an electrical signal.

  The optical signal passes through the optical / electrical composite cable 15 while being attenuated through the optical fiber in the optical / electrical composite cable 15, passes through the optical / electrical composite connector 15 b, 2, and is input to the light receiving element 9. .

  Here, the light receiving element 9 is a photodiode (PD) modularized as the light receiving module 35, and converts an optical signal into an electric signal.

  The optical signal input to the light receiving element 9 is converted into an electrical signal. However, since PD generally varies in output current, a signal having no variation is output by passing through the monitor current conversion efficiency cancellation circuit 5B. The digital signal is passed through the A / D conversion circuit 7B and input to the arithmetic circuit 12.

  The optical signal from the light emitting element 3 is also received by the adjacent monitor light receiving element 4 and converted into an electric signal. However, since the output current also varies, it passes through the monitor current conversion efficiency cancellation circuit 5B. As a result, the signal does not vary, is converted into a digital signal through the A / D conversion circuit 7B, and is input to the arithmetic circuit 12.

  The inspection light reception signal and the monitor light input to the arithmetic circuit 12 are subjected to arithmetic processing by the arithmetic circuit 12, and the arithmetic result is output to the display circuit 13 as a loss amount of the optical / electrical composite cable 15, so that the light intensity is at a level. Displayed as a gauge or digital number.

  Next, wire connection inspection will be described. The electrical signal generated by the electrical signal generation circuit 8 of the electrical signal output unit 1b is input to the electric wire in the optical / electrical composite cable 15 from the optical / electrical composite connector 1, 15a. If the electric wire in the optical / electrical composite cable 15 is conducted, the electric signal is input to the electric signal detection circuit 10 of the electric signal input unit 1d through the optical / electrical composite connectors 15b and 15b. When the electric signal detection circuit 10 exceeds a set voltage, a signal is input to the display circuit 13, and the lamp is turned on or a buzzer sounds.

  In the display circuit 13, for example, the light reception level is displayed by a level gauge, and is displayed in a 0.25 dB / 1 memory from 0 to 5 dB or 1 dB / 1 memory or a numerical value from 5 to 10 dB. For example, the display circuit 13 is provided with a light emitting lamp corresponding to each of two power lines, two control lines, and one shield, and is turned on when it is conductive.

  Furthermore, as can be seen at a glance, the connection state of the optical / electrical composite cable 15 is “OK” if the loss of the optical fiber is less than 3 dB and there is no problem with the continuity of the wire, or the optical fiber has a loss of 5 dB or more, or If there is an abnormality such as a broken wire, the calculation circuit 12 also has a function to turn on the “CAUTION” lamp when the light reception level is slightly high (3 to 5 dB). Prepare.

  2 and 3 show a connection checker for an optical / electrical composite cable according to a second embodiment of the present invention, and common reference numerals are given to portions common to FIG.

  In FIG. 2, an optical signal output unit 1a, an electrical signal output unit 1b, an optical signal input unit 1c, and an electrical signal input unit 1d are connected to a single optical / electrical composite connector 1.

  In FIG. 3, one end of the optical / electrical composite cable 15 is connected to the optical / electrical composite connector 1 of the connection checker via an optical / electrical composite connector (not shown), and the other terminal is connected via an optical / electrical composite connector (not shown). Connect to the folded connector 21. The folded connector 21 is a connector that can be fitted into an optical / electrical composite connector (not shown) of the optical / electrical composite cable 15, and light or an electrical signal is input from the optical / electrical composite cable 15 to one port of the folded connector 21. Since the optical fiber and the electric wire are looped in the connector 21, the optical signal and the optical signal output from the optical / electrical composite cable 15 to the folded connector 21 are output from another port. The electric signal is turned back and input to the optical / electrical composite cable 15 again. In this embodiment, the optical / electrical composite cable 15 has a configuration with two optical fibers and two electric wires.

  In the above configuration, the optical signal output from the optical signal output unit 1a is folded back from the optical fiber 17a in the optical / electrical composite cable 15 to the optical fiber 17b and input to the optical input unit 1b. Similarly, the electrical signal output from the electrical output unit 1 c passes through the electric wire 18 a in the optical / electrical composite cable 15, passes through the electric wire 20 in the folded connector 21, and passes through the electric / electrical composite cable 15. It is folded back into the electric wire 18b and input to the electric input unit 1d.

  In the connection checker, the loss amount of the two optical fibers 17a and 17b in the optical / electrical composite cable is calculated by the monitor light reception signal and the inspection light reception signal as in the first embodiment, and the electrical signal The continuity between the optical fibers 17a and 17b and the electric wires 18a and 18b can be confirmed by the presence or absence of reception.

  When the optical / electrical composite cable 15 includes an even number of optical fibers and electric wires, it is possible to form a loop in which an output signal returns by connecting the folded connector 21 to the cable terminal. Even in the case of cables laid in separate remote places, a short-time continuity test can be performed by connecting the folded connector 21.

  FIG. 4 shows a connection checker for an optical / electrical composite cable according to a third embodiment of the present invention, and common reference numerals are given to portions common to FIG.

  In FIG. 4, the optical / electrical composite connector 1 is connected to the optical transmission module 34 and the electric signal generating circuit 8, and the optical / electrical composite connector 2 is connected to the optical receiving module 35 and the electric signal detection circuit 10. Optical optical / electrical harnesses 2a and 2b are configured by providing optical connectors 22a to 22d and electrical connectors 23a to 23d that can be attached to and detached from optical fibers and electric wires. As a result, the optical / electrical composite harnesses 2a, 2b can be detached from the connection checker, so that the optical / electrical composite harnesses 2a, 2b to which other types of optical / electrical composite connectors 1, 2 are connected can be exchanged.

  For example, even if the connection checker is equipped with the optical / electrical connectors 1 and 2 of the OPS24xx series (manufactured by Tajimi Radio Co., Ltd.), the optical / electrical harnesses 2a and 2b of the connection checker are connected to the 3K. By exchanging with the one having the optical / electrical composite connectors 1 and 2 of 93C series (manufactured by LEMO), the continuity test of the optical / electrical composite cable having the optical / electrical composite connector made by LEMO is possible.

  5 and 6 show a connection checker for an optical / electrical composite cable according to a fourth embodiment of the present invention, and common reference numerals are given to portions common to FIG.

  FIG. 5 shows a configuration in which the LD driver 6 and the arithmetic circuit 12 are connected by the signal line 26 in the optical / electrical composite cable connection checker according to the first embodiment.

  In the above configuration, the optical signal from the light emitting element 3 is received by the monitoring light receiving element 4 and converted into an electric signal, converted into a digital signal through the monitor current conversion efficiency cancellation circuit 5A and the A / D conversion circuit 7A, Input to the arithmetic circuit 12. The arithmetic circuit 12 supplies a monitor signal to the LD driver 6 via the signal line 26 to drive the light emitting element 3, and from the optical signal output unit 1 a as the light emission amount monitor notification signal in the same manner as the optical signal for inspection. Is output.

  FIG. 6 shows a configuration in which two connection checkers of the present invention are used. The optical / electrical composite connector 1 of the output unit 14A of the first connection checker 24 is connected to one end of the optical / electrical composite cable 15, and the input The optical / electrical composite connector 2 of the part 14B is in an open state. The optical / electrical composite connector 2 of the input unit 14B of the second connection checker 25 is connected to the other end of the optical / electrical composite cable 15, and the optical / electrical composite connector 1 of the output unit 14A is opened. Here, the light emission amount monitor notification signal of the connection checker 24 is output together with the optical signal and is received by the connection checker 25. Thereby, the light emission amount monitor notification signal of the connection checker 24 and the optical signal attenuated through the optical / electrical composite cable 15 are calculated by the arithmetic circuit 12 and connected to the optical / electrical composite connector 2 of the input unit 14B. 25 shows the inspection result. Therefore, even when the optical / electrical composite cable 15 is already laid and the terminal is in a separate place, the inspection can be performed.

  FIG. 7 shows a connection checker according to a fifth embodiment of the present invention, and common reference numerals are given to parts common to FIG.

  In the optical / electrical composite cable connection checker according to the first embodiment, the output unit 14A includes a plurality of optical signal output units 1a and an electric signal output unit 1b. Is output. The input unit 14B also includes a plurality of optical signal input units 1c and an electrical signal input unit 1d, and a plurality of optical and electrical signals are input to the optical / electrical composite connector 2. With this configuration, the optical / electrical composite connectors 1 and 2 can be connected to an optical / electrical composite connector connected to a multi-core optical / electrical composite cable. Therefore, by simply connecting a multi-core optical / electrical composite cable to this connection checker, it becomes possible to inspect all the continuity states of the optical fibers and electric wires of the multi-core optical / electrical composite cable.

  FIG. 8 shows a connection checker according to the sixth embodiment of the present invention, and common reference numerals are given to portions common to FIG.

  In FIG. 8, in the connection checker, an input unit 14A and an output unit 14B are separated, and each has an arithmetic circuit 12A and a power supply circuit 11A. However, the display circuit 13 is provided only in the input unit 14B. The arithmetic circuit 12A of the output device is connected to the A / D conversion circuit 7A and the LD driver 6, and the arithmetic circuit 12B of the input unit 14B is connected to the A / D conversion circuit 7B and the electric signal detection circuit unit 10.

  In the above configuration, the optical signal from the light emitting element 3 is also received by the monitoring light receiving element 4 and converted into an electric signal, and converted into a digital signal through the monitor current conversion efficiency cancel circuit 5A and the A / D conversion circuit 7A. Are input to the arithmetic circuit 12A. Here, a light emission amount monitor notification signal is output from the arithmetic circuit 12A to the LD driver 6 to send the light emission amount of the light emitting element 3 to the input unit 14B, and the input unit 14B is connected to the other end of the optical / electrical composite cable 15. Thus, the light emission amount monitor notification signal and the optical signal that have passed through the optical / electrical composite cable 15 are input to the arithmetic circuit 12B, where they are calculated and the inspection result is displayed on the display circuit 13 of the input unit 14B. Therefore, even when both terminals of the existing optical / electrical composite cable 15 are in separate locations, the inspection can be performed in a short time.

The block diagram which shows the connection checker of the 1st Embodiment of this invention. The block diagram which shows the connection checker of the 2nd Embodiment of this invention. Explanatory drawing which shows operation | movement of the connection checker of FIG. The block diagram which shows the connection checker of the 3rd Embodiment of this invention. The block diagram which shows the connection checker of the 4th Embodiment of this invention. Explanatory drawing which shows operation | movement of the connection checker of FIG. The block diagram which shows the connection checker of the 5th Embodiment of this invention. The block diagram which shows the connection checker of the 6th Embodiment of this invention. The conventional optical fiber tester is shown, (a) is a block diagram, (b) And (c) is explanatory drawing which shows operation | movement. The conventional electrical continuity checker is shown, (a) is a block diagram, (b) is explanatory drawing which shows operation | movement. The block diagram which shows the conventional OTDR. The block diagram which shows the conventional optical tester. The block diagram which shows the conventional multi-cable checker.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 Optical / electrical composite connector 1a Optical signal output part 1b Electric signal output part 1a Optical signal input part 1a Electric signal input part 3 Light emitting element 4,9 Light receiving element 5A, 5B Monitor current conversion efficiency cancellation circuit 6 LD driver 7A, 7B A / D conversion circuit 8 Electrical signal generation circuit 10 Electrical signal detection circuit 11 Power supply circuit 12 Arithmetic circuit 13 Display circuit 14A Output unit 14B Input unit 15 Optical / electrical composite cable 15a, 15b Optical / electrical composite connector

Claims (10)

An output unit for outputting an optical signal and an electric signal to be input to an optical / electrical composite cable having a cable core obtained by twisting a plurality of optical fibers and a plurality of electric wires, and having an optical / electrical composite connector at both ends;
An input unit for inputting the optical signal and the electrical signal output from the optical / electrical composite cable;
An arithmetic unit that calculates a level difference between the optical signal output by the output unit and the optical signal input by the input unit;
A display unit that performs a predetermined display according to the output of the calculation unit,
The output unit includes an optical / electrical composite connector connected to the optical / electrical composite connector at one end of the optical / electrical composite cable, an optical signal output unit that outputs the optical signal, and an electrical that outputs the electrical signal. And a signal output unit,
The input unit is an optical / electrical composite connector connected to the optical / electrical composite connector at the other end of the optical / electrical composite cable, an optical signal input unit for inputting the optical signal, and an input of the electrical signal. An electric signal input unit,
The display unit displays an inspection result of the connection of the plurality of optical fibers according to the level difference, and an inspection result of the connection of the plurality of electric wires according to the level of the electric signal input to the electric signal input unit. An optical / electrical composite cable connection checker characterized by displaying. The optical signal output unit includes: a light emitting element that generates the optical signal; a light receiving element that receives the optical signal of the light emitting element and outputs a monitor current; and a monitor that cancels variations in the monitor current of the light receiving element. A current conversion efficiency cancellation circuit; an A / D conversion circuit for A / D converting an output of the monitor current conversion efficiency cancellation circuit; and outputting an output of the monitor current conversion efficiency cancellation circuit to the arithmetic circuit; An LD driver for outputting a drive signal to the light emitting element;
The optical signal input unit includes a light receiving element that receives the optical signal and outputs a monitor current, a monitor current conversion efficiency cancellation circuit that cancels variation in the monitor current of the light receiving element, and the monitor current conversion efficiency cancellation circuit 2. An optical / electrical composite cable connection checker according to claim 1, further comprising an A / D conversion circuit for A / D converting the output of the output and outputting to the arithmetic circuit.   2. The optical / electrical composite connector of the output unit and the optical / electrical composite connector of the input unit are configured as a single common optical / electrical composite connector. Electrical composite cable connection checker. The optical / electrical composite connector of the output unit has a first optical connector and a first electrical connector on the output unit side,
The optical signal output unit has a second optical connector connected to the first optical connector,
The optical / electrical composite connector of the input unit has a third optical connector and a third electrical connector on the input unit side,
The optical signal input unit has a fourth optical connector connected to the third optical connector,
The optical / electrical composite cable connection checker according to claim 1, wherein the electric signal input unit includes a fourth electric connector connected to the third electric connector. The arithmetic circuit has a configuration for outputting an arithmetic signal calculated based on an A / D conversion signal input from the A / D conversion circuit of the optical signal output unit to the LD driver,
2. The optical / electrical composite cable connection checker according to claim 1, wherein the LD driver is configured to drive the light emitting element based on the arithmetic signal to output a light emission amount monitor notification signal.   The optical / electrical composite cable connection according to claim 1, wherein the optical signal output unit and the electrical signal output unit each include a plurality of optical signal output units and electrical signal output units arranged in parallel. checker.   The arithmetic circuit includes: a first arithmetic circuit that outputs the arithmetic signal; and an optical fiber of an optical / electrical composite cable based on outputs of the optical signal input unit that receives the optical signal and the light emission amount monitor notification signal. 6. The optical / electrical composite cable connection checker according to claim 5, further comprising a second arithmetic circuit for determining whether the electrical connection is established. An optical / electrical signal generation stage for generating optical and electrical signals;
An optical / electrical signal output stage for outputting the optical signal and the electrical signal to one end of the optical / electrical composite cable via the optical / electrical composite connector;
An optical / electrical signal input step for inputting the optical signal and the electric signal propagated through the optical / electrical composite cable from the other end of the optical / electrical composite cable or from the one end via an optical / electrical composite connector;
The optical / electrical composite cable based on the calculation result of the level difference of the optical signal between the optical / electrical signal output stage and the optical / electrical signal input stage, and the detection result of the electrical signal in the optical / electrical signal input stage A connection inspection method for optical and electrical composite cables, comprising a connection inspection stage for performing a connection inspection.   The optical / electrical signal input step includes a step of inputting the optical signal and the electric signal turned back in the middle of the optical / electrical composite cable from the one end through a common optical / electrical composite connector. The method for inspecting connection of an optical / electrical composite cable according to claim 8. The optical / electrical signal output step comprises preparing a first connection checker comprising an output unit for outputting the optical signal and the electric signal, and an input unit for inputting the optical signal and the electric signal; Connecting the output portion of the first connection checker to the one end of the optical / electrical composite cable;
The optical / electrical signal input step includes a step of preparing a second connection checker including an output unit that outputs the optical signal and the electrical signal, and an input unit that inputs the optical signal and the electrical signal; The optical / electrical composite cable connection inspection method according to claim 8, further comprising a step of connecting the input section of the second connection checker to the other end of the optical / electrical composite cable.