CN107390083B - Portable cable check-up and cable electrified detector - Google Patents
Portable cable check-up and cable electrified detector Download PDFInfo
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- CN107390083B CN107390083B CN201710439500.9A CN201710439500A CN107390083B CN 107390083 B CN107390083 B CN 107390083B CN 201710439500 A CN201710439500 A CN 201710439500A CN 107390083 B CN107390083 B CN 107390083B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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Abstract
The invention discloses a portable cable checking and live-line detection instrument, which comprises a box body, wherein a checking wire and live-line detection circuit board is arranged in the box body, a plurality of groups of checking wire visual rows are arranged on the box body, and a checking wire manual switch, a live-line detection audible and visual alarm mechanism and a live-line detection antenna are arranged on the box body; each group of the line correcting visual rows comprises a starting end binding post, a self-checking display lamp, a line correcting display lamp and a tail end binding post; the wire calibrating and live detection circuit board comprises a power supply module, a power supply control module, a wire calibrating self-detection and detection module and a live detection alarm module, wherein a power supply connection port of the power supply module is used for being connected with mains supply, power supply ports of the power supply module are respectively connected with power supply input ends of the power supply control module and the live detection alarm module, and a power supply end of the power supply control module is connected with a power connection end of the wire calibrating self-detection and detection module; the method can save a great deal of time and energy of detection personnel, and improves the efficiency of power distribution network, transformer substation engineering transformation and capital construction.
Description
Technical Field
The invention relates to the technical field of cable calibration detection of power systems, in particular to a portable cable calibration and cable live detector.
Background
In the process of on-site distribution network, transformer substation engineering transformation and capital construction, a large number of control cables or secondary wire cores can be used, and when in installation and butt joint, an installer cannot accurately and definitely butt joint a plurality of cables which are wound together one by one. Whether the cable conductor is well conducted or not, whether the one-to-one correspondence of the cable core is correct or not, and the normal operation of the electrical equipment is directly affected.
The number of on-site cables is large, the cable length is long, and great inconvenience is brought to the cable core wire calibration work. At present, the calibration work of the cable core wire is extremely complicated, and in the detection process, 2 persons often execute one end of the cable joint respectively and measure the cable joint by using an ohm gear of a universal meter; the testing method has more defects: firstly, the efficiency is very low, the measurement speed is very slow, and a great deal of time and energy are occupied for the detection personnel; secondly, the labor is consumed, 2 people have to measure at the same time, and the debugging progress can be influenced when the actual equipment is maintained and only 1 person is on site.
Or requires 2-3 persons to use a tool for alignment such as turning on a lamp. For example: one control cable is 10 cores, and the total number of proofreads is 1+2+3+ & gt..times+9+10=55 times at most, and the workload is extremely large.
By adopting the two modes, the following defects are found in the alignment of the lamp or the universal meter: first, dependence on person's skills; secondly, the line calibration is tedious one by one, the workload is large, and the operation time is long; thirdly, the more the secondary core number is, the wire correcting work amount is multiplied; fourth, the secondary wire core is electrified and can not be identified in time, so that personal safety problems are easily caused.
Disclosure of Invention
The invention aims to provide a portable cable checking and cable electrified detector which can solve the problems of low efficiency and low measuring speed in a detection flow; meanwhile, the number of detection personnel is reduced, and a great amount of time and energy of the detection personnel are saved; and the efficiency of power distribution network, transformer substation engineering transformation and capital construction is improved.
The invention adopts the technical scheme that:
the portable cable checking and live-line cable detecting instrument comprises a box body, wherein a checking wire and live-line detecting circuit board is arranged in the box body, a plurality of groups of checking wire visual rows are arranged on the box body, and a checking wire manual switch, a live-line detecting acousto-optic alarm mechanism and a live-line detecting antenna are also arranged on the box body;
each group of the line correcting visual rows comprises a starting end binding post, a self-checking display lamp, a line correcting display lamp and a tail end binding post;
the wire calibrating and live detection circuit board comprises a power supply module, a power supply control module, a wire calibrating self-checking and detecting module and a live detection alarm module, wherein a power supply connection port of the power supply module is used for being connected with mains supply, power supply ports of the power supply module are respectively connected with power supply input ends of the power supply control module and the live detection alarm module, and a power supply end of the power supply control module is connected with a power connection end of the wire calibrating self-checking and detecting module.
The visual row of school line set up 10 groups, the visual row of school line of every group top binding post, self-checking display lamp, school line display lamp and terminal binding post in the visual row of school line arrange in proper order from top to bottom and set up, and the visual row of school line of every group is horizontal arrangement in proper order.
The power supply module comprises a three-terminal voltage-stabilizing integrated circuit, a power input port of the three-terminal voltage-stabilizing integrated circuit is connected with a mains voltage, and a power input end of the three-terminal voltage-stabilizing integrated circuit is also connected with a cathode of the chargeable and dischargeable battery pack through a first capacitor; the power output end of the three-terminal voltage-stabilizing integrated circuit is connected with the positive electrode of the chargeable and dischargeable battery pack through the first voltage drop diode, the negative electrode of the chargeable and dischargeable battery pack is connected with the grounding end of the three-terminal voltage-stabilizing integrated circuit, and the positive electrode and the negative electrode of the chargeable and dischargeable battery pack are used as power supply ports of the power supply module.
The power supply control module comprises a wire calibrating manual switch and a singlechip, wherein a power supply access end of the singlechip is connected with a positive electrode of the chargeable and dischargeable battery pack through the wire calibrating manual switch, a power supply access end of the singlechip is also connected with a negative electrode of the chargeable and dischargeable battery pack through an input filter capacitor, a first pin of the singlechip is connected with the wire calibrating self-checking and detecting module through an oscillating circuit and a second voltage drop diode in sequence, a second pin of the singlechip is connected with the negative electrode of the chargeable and dischargeable battery pack through a voltage dividing resistor circuit and an output filter capacitor, and the negative electrode of the second voltage drop diode and the negative electrode of the chargeable and dischargeable battery pack are used as power supply ends of the wire calibrating self-checking and detecting module.
The wire calibrating self-checking and detecting module comprises a plurality of groups of wire calibrating display circuits which are connected in parallel, each group of wire calibrating display circuits comprises a first voltage dividing resistor, a self-checking display diode and a wire calibrating display diode which are sequentially connected in series, the wire calibrating display diode is connected with a second voltage dividing resistor in parallel, a starting end connecting terminal is arranged between the first voltage dividing resistor and the self-checking display diode, and a tail end connecting terminal is arranged between the self-checking display diode and the wire calibrating display diode; the left end of the first voltage dividing resistor is connected with the cathode of the second voltage drop diode, and the cathode of the line correction display diode is connected with the cathode of the chargeable and dischargeable battery.
The self-checking display diode is a self-checking display lamp, and the line checking display diode is a line checking display lamp.
The charged body detection alarm module comprises a charged detection switch, an antenna module, a signal processing amplification module and an audible and visual alarm module, wherein the positive electrode of the chargeable and dischargeable battery pack is connected with the signal processing amplification module through the charged detection switch, the signal output end of the antenna module is connected with the signal processing amplification module through input impedance, and the signal processing amplification module is connected with the audible and visual alarm module.
The signal processing amplifying module comprises a primary amplifying field effect transistor, a middle-stage amplifying triode and a final-stage driving triode, wherein a grid electrode of the primary amplifying field effect transistor is connected with a signal output end of the antenna module through input impedance, the grid electrode of the primary amplifying field effect transistor is also connected with a negative electrode of the chargeable and dischargeable cell group through a sensitive resistor, a drain electrode of the primary amplifying field effect transistor is connected with a charged detection switch through a first resistor, a drain electrode of the primary amplifying field effect transistor is also connected with a base electrode of the middle-stage amplifying triode, a source electrode of the primary amplifying field effect transistor is connected with a negative electrode of the chargeable and dischargeable cell group, a collector electrode of the middle-stage amplifying triode is connected with the charged detection switch through a second resistor, an emitter electrode of the middle-stage amplifying triode is connected with a base electrode of the final-stage driving triode through a third resistor, a collector electrode of the final-stage amplifying triode is connected with a negative electrode of the chargeable and dischargeable cell group through a filter capacitor, and a collector electrode of the final-stage driving triode is connected with the charged detection switch through an acousto-optic alarm module.
The audible and visual alarm module adopts a buzzer and a light emitting diode.
According to the portable detector, the box body is used as a carrier of the portable detector, the calibration wires and the electrified detection circuit board are arranged in the box body, one end of a plurality of cables to be checked is connected to the starting terminal through a plurality of groups of calibration wires visual rows arranged on the box body, then the tail end of any one of the plurality of cables is selected to be randomly connected to the tail end terminal in a certain group of calibration wire display circuits, and at the moment, if the cable connected with the tail end terminal and the cable connected to the starting terminal of the first group of calibration wire display circuits do not belong to the same cable, all green lights are lightened, and all red lights are not lightened; if the cable connected with the terminal at the tail end and the cable connected to the terminal at the starting end of the first group of wire calibrating display circuits belong to the same cable, the green light in the first group of wire calibrating display circuits is extinguished, the red light of the group where the terminal at the tail end is positioned is lighted, and the green light in the group of wire calibrating display circuits is extinguished. In this way, the wire calibration can be performed only once, and whether the cable for the wire calibration is the same wire or not can be clearly distinguished.
Meanwhile, the live detection alarm module can be used for detecting whether the cable body is electrified or not, and the antenna module is mainly used for inducing a magnetic field emitted by surrounding cables, processing signals received through induction firstly through input impedance, then sending the signals to the primary amplifying field effect transistor for filtering and amplifying, and then amplifying the signals amplified for the first time through the intermediate amplifying triode and the final driving triode in sequence. If the received magnetic field effect meets the working condition of the buzzer after being amplified, the cable body is judged to be electrified, so that workers are reminded of careful treatment, and the personal safety of operators is ensured.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic circuit diagram of the present invention.
Detailed Description
As shown in fig. 1, the invention comprises a box body 1, wherein the box body 1 adopts a square box body, a calibration line and an electrified detection circuit board are arranged in the box body 1, a plurality of groups of calibration line visual rows are arranged on the box body 1, and the plurality of groups of calibration line visual rows are arranged on the front surface of the box body 1; each group of the line calibrating visual rows comprises a starting terminal 2, a self-checking display lamp 3, a line calibrating display lamp 4 and a terminal 5; the visual row of school line sets up 10 groups, and the visual row of school line of every group is from top to bottom arranging in proper order and setting up in proper order in beginning binding post 2, self-checking display lamp 3, school line display lamp 4 and terminal 5 in the visual row of school line, and the visual row of every group school line is horizontal arrangement in proper order. The box body 1 is also provided with a manual wire calibrating switch S1, a live detection switch S2, a live detection acousto-optic alarm mechanism and a live detection antenna 6. 10 initial terminal 2 and terminal 5 adopt current structure, through the mode of screwing up, with the end crimping of cable in binding post, belong to current mature technique, do not repeat.
As shown in fig. 2, the wire calibrating and live detecting circuit board comprises a power supply module, a power supply control module, a wire calibrating self-detecting and detecting module and a live detecting and alarming module, wherein a power supply power receiving port of the power supply module is used for being connected with a mains supply, power supply ports of the power supply module are respectively connected with power supply input ends of the power supply control module and the live detecting and alarming module, and a power supply end of the power supply control module is connected with a power receiving end of the wire calibrating self-detecting and detecting module.
The power supply module comprises a three-terminal voltage-stabilizing integrated circuit, a power input port Vin of the three-terminal voltage-stabilizing integrated circuit is connected with a mains voltage, and the power input port Vin of the three-terminal voltage-stabilizing integrated circuit is also connected with a cathode of the chargeable and dischargeable battery set BT through a first capacitor C1; the power output end Vout of the three-terminal voltage-stabilizing integrated circuit is connected with the positive electrode of the chargeable and dischargeable battery group BT through a first voltage drop diode D1, the negative electrode of the chargeable and dischargeable battery group BT is connected with the grounding end GND of the three-terminal voltage-stabilizing integrated circuit, and the positive electrode and the negative electrode of the chargeable and dischargeable battery group BT are used as power supply ports of a power supply module. The three-terminal voltage-stabilizing integrated circuit adopts 7805 series single chip microcomputer.
The power supply control module comprises a wire calibrating manual switch S1 and a singlechip, wherein a power supply access end VCC of the singlechip is connected with a positive electrode of the chargeable and dischargeable battery group BT through the wire calibrating manual switch S1, the power supply access end VCC of the singlechip is also connected with a negative electrode of the chargeable and dischargeable battery group BT through an input filter capacitor C2, a first pin 1 of the singlechip is sequentially connected with a wire calibrating self-checking and detecting module through an oscillating circuit and a second voltage drop diode D3, a second pin 2 of the singlechip is connected with a negative electrode of the chargeable and dischargeable battery group BT through a voltage dividing resistor circuit and an output filter capacitor C4, and the negative electrode of the second voltage drop diode D3 and the negative electrode of the chargeable and dischargeable battery group BT are used as power supply ends of the wire calibrating self-checking and detecting module. The singlechip adopts MC34063 model, and MC34063 device itself contains the monolithic control circuit of the required main function of DC/DC converter. The device consists of a reference voltage generator with a temperature automatic compensation function, a comparator, an oscillator with a controllable duty ratio, an R-S trigger, a high-current output switch circuit and the like. The device can be used for control cores of boost converters, buck converters and inverters, and the DC/DC converter formed by the device only uses a small amount of external components. The method is mainly applied to a system based on a Microprocessor (MPU) or a single chip Microcomputer (MCU). The chip has wide application, is universal, cheap and easy to purchase.
The oscillating circuit comprises an oscillating circuit capacitor C3, an oscillating circuit diode D2 and an inductor L1, one end of the oscillating circuit capacitor C3 is connected with a third pin 3 of the single chip microcomputer, the other end of the oscillating circuit capacitor C3 is connected with the negative electrode of the chargeable and dischargeable battery group BT, the left end of the inductor L1 is connected with a first pin 1 of the single chip microcomputer, the right end of the inductor L1 is connected with the positive electrode of the second voltage drop diode D3, the negative electrode of the oscillating circuit diode D2 is connected with the left end of the inductor L1, the positive electrode of the oscillating circuit diode D2 is connected with the negative electrode of the chargeable and dischargeable battery group BT, and the oscillating circuit diode D2 plays a role in limiting current.
The voltage dividing resistor circuit comprises a voltage dividing first resistor R3 and a voltage dividing second resistor R4, wherein the first end of the voltage dividing first resistor R3 is connected with the second pin 2 of the single chip microcomputer, the second end of the voltage dividing first resistor R3 is connected with the negative electrode of the chargeable battery group BT, the first end of the voltage dividing second resistor R4 is connected with the second pin 2 of the single chip microcomputer, the second end of the voltage dividing second resistor R4 is connected with the negative electrode of the chargeable battery group BT through an output filter capacitor C4, and the second end of the voltage dividing second resistor R4 is also connected with the right end of the inductor L1.
The wire checking self-checking and detecting module comprises a plurality of groups of wire checking display circuits which are connected in parallel, each group of wire checking display circuits comprises a first voltage dividing resistor R1n, a self-checking display diode DS1n and a wire checking display diode DS2n which are sequentially connected in series, two ends of the wire checking display diode DS2n are connected with a second voltage dividing resistor R2n in parallel, a starting end connecting terminal 2 is arranged between the first voltage dividing resistor R1n and the self-checking display diode DS1n, and a tail end connecting terminal 5 is arranged between the self-checking display diode DS1n and the wire checking display diode DS2 n; the left end of the first voltage dividing resistor R1n is connected with the cathode of the second voltage drop diode D3, and the cathode of the line correction display diode DS2n is connected with the cathode of the chargeable and dischargeable battery set BT.
The self-checking display diode DS1n is a self-checking display lamp 3, and the correction line display diode DS2n is a correction line display lamp 4.
The charged body detection alarm module comprises a charged detection switch S2, an antenna module Ei, a signal processing and amplifying module and an audible and visual alarm module, wherein the positive electrode of the chargeable and dischargeable battery set BT is connected with the signal processing and amplifying module through the charged detection switch S2, the signal output end of the antenna module Ei is connected with the signal processing and amplifying module through an input impedance R5, and the signal processing and amplifying module is connected with the audible and visual alarm module.
The signal processing amplifying module comprises a primary amplifying field effect transistor Q1, a middle-stage amplifying triode Q2 and a final-stage driving triode Q3, wherein a grid electrode of the primary amplifying field effect transistor Q1 is connected with a signal output end of the antenna module Ei through an input impedance R5, the grid electrode of the primary amplifying field effect transistor Q1 is also connected with a cathode of the final-stage driving triode Q3 through a sensitive resistor R6, a drain electrode of the primary amplifying field effect transistor Q1 is connected with a charge detection switch S2 through a first resistor R7, a drain electrode of the primary amplifying field effect transistor Q1 is also connected with a base electrode of a middle-stage amplifying triode Q2, a source electrode of the primary amplifying field effect transistor Q1 is connected with a cathode of the charge and discharge battery set BT, a collector electrode of the middle-stage amplifying triode Q2 is connected with the cathode of the charge and discharge battery set through a second resistor R8, a collector electrode of the middle-stage amplifying triode Q2 is connected with a base electrode of the final-stage driving triode Q3 through a third resistor R9, a collector electrode of the middle-stage amplifying triode Q2 is connected with a collector of the charge and discharge battery set BT can be connected with the cathode of the charge and discharge battery set Q3 through a filter capacitor C6. The audible and visual alarm module adopts a buzzer LS and a light emitting diode LED.
The working principle of the invention is described below with reference to the accompanying drawings:
the device has two functions, namely a cable calibrating function and a function of judging whether the cable is electrified to detect, and meanwhile, when the cable calibrating function is used, the device is required to be subjected to a self-checking function at first, so that each cable calibrating display circuit is ensured to be in a conducting state.
Firstly, the commercial power voltage is subjected to voltage stabilization and voltage reduction treatment, stable 5V voltage is output through a three-terminal voltage stabilization integrated circuit through a power output pin, then the voltage is reduced through a first voltage drop diode D1, the voltage of the first voltage drop diode D1 is reduced by 0.7V, and then the battery pack is charged, so that the charging requirement of the battery pack is met.
When the cable is calibrated, the manual cable calibrating switch S1 is manually pressed, so that the replayable battery pack supplies power for the whole device, and when the device does not perform detection work, the device can be charged so as to be full in electric quantity for use at any time. The battery pack is conducted through the manual switch S1 for line correction, filtering is conducted through the input filter capacitor C2, the filtered voltage is transmitted to the single chip microcomputer, the single chip microcomputer is connected with the oscillating circuit through the first pin 1 to provide pulses for the single chip microcomputer, the voltage of 4.5V is output through the second voltage drop diode D3, meanwhile, the single chip microcomputer is connected with the voltage dividing resistor circuit and the output filter capacitor C4 through the second pin 2, the voltage dividing resistor circuit is mainly used for voltage detection, and stable voltage transmission is conducted through the output filter capacitor C4. The second voltage drop diode D3 and the negative electrode of the chargeable and dischargeable battery BT form a power supply port of the calibration line self-checking and detecting module, so that the calibration line self-checking and detecting module forms a calibration line loop.
Before the line is calibrated again, self-detection of the line is firstly carried out, and the conduction of the line calibrating circuit is ensured. Self-checking principle: when the calibration line self-checking and detecting module is conducted, the current flow direction in each circuit is a first voltage dividing resistor R1n, a self-checking display diode DS1n and a second voltage dividing resistor R2n, so that the self-checking display diode DS1n is conducted and shiny, the self-checking display diode DS1n adopts a green diode, at the moment, the calibration line display diode DS2n is not conducted and is not shiny, and the calibration line display diode DS2n adopts a red diode. In the self-checking process, the green self-checking display diode DS1n in each path is lightened, which means that each path of line checking display circuit is normally electrified and can perform line checking. As shown in fig. 1, ten sets of calibration line display circuits, for example, are arranged from left to right, the first left column is a first set of calibration line display circuits, including a first voltage dividing resistor R10, a self-checking display diode DS10, a calibration line display diode DS20, and a second voltage dividing resistor R20 connected in parallel with the calibration line display diode DS20, and so on from left to right, and the tenth set includes a first voltage dividing resistor R19, a self-checking display diode DS19, a calibration line display diode DS29, and a second voltage dividing resistor R29 connected in parallel with the calibration line display diode DS 29. Likewise, the terminals in each group are labeled in this manner, for example, the beginning terminal 2 of the first group of wire alignment display circuits may be represented by J10, the end terminal 5 may be represented by J20, and then the beginning terminal 2 of the tenth group of wire alignment display circuits may be represented by J19 and the end terminal 5 may be represented by J29.
When the wires are aligned, the initial end of one of the disordered cables is connected to the initial end wiring terminal 2 of the first group of wire alignment display circuits, then the tail end of any one of the cables is randomly connected to the tail end wiring terminal 5 of a certain group of wire alignment display circuits, at this time, if the cable connected with the tail end wiring terminal 5 and the cable connected to the initial end wiring terminal 2 of the first group of wire alignment display circuits do not belong to the same cable, all green lights are lighted, and all red lights are not lighted; if the cable connected to the terminal 5 is the same as the cable connected to the start terminal 2 of the first group of calibration line display circuits, the green light in the first group of calibration line display circuits is turned off, the red light in the group where the terminal 5 is located is turned on, and the green light in the group of calibration line display circuits is turned off. In this way, the wire calibration can be performed only once, and whether the cable for the wire calibration is the same wire or not can be clearly distinguished.
If ten cables in the embodiment are adopted to calibrate simultaneously, first, the starting ends of the ten cables are connected with the starting end wiring terminals 2 in the ten groups of calibration line display circuits one by one, then, the tail ends of any one cable are selected and connected to the tail end wiring terminals 5 in one group of calibration line display circuits at random, at this time, it can be seen that the green light of the group where the tail end wiring terminals are located is extinguished, the red light of the group where the tail end wiring terminals 5 are located is lighted, and then, it can be determined that the cable connected to the starting end wiring terminals 2 in the group where the forefront green light is extinguished and the cable connected to the tail end wiring terminals 5 of the group where the red light is lighted belong to the same cable.
The principle is as follows: for example, when the start end of the same cable is connected to the start end connection terminal J11 in the second group of wire calibration display circuits, the end of the same cable is connected to the end connection terminal J25 in the sixth group of wire calibration display circuits, which is equivalent to the short-circuiting of the components before the self-checking display diode DS11, the wire calibration display diode DS21, and the second voltage dividing resistor R21 in the second group of wire calibration display circuits, the green lights in the second group and the sixth group are all turned off, and the voltage divided by the wire calibration display diode DS25 in the sixth group is increased due to the short circuit, so that the voltage drop of the wire calibration display diode DS25 is reached, and the turn-on state is changed from the turned-off state to the lighted state. Before the calibration is started, the voltage divided by the self-checking display diode DS1n is larger, and the voltage drop value of the self-checking display diode DS1n can be reached, so that the self-checking display diode DS1n is conducted and shines, the voltage divided by the calibration display diode DS2n is lower, and the voltage drop voltage of the calibration display diode DS2n cannot be reached, so that the calibration display diode DS2n is not conducted and is in a extinguished state.
When whether the cable body needs to be electrified for detection, the electrified detection switch S2 is closed, so that the electrified detection alarm module is electrified, the antenna module Ei works to sense the magnetic field emitted by the surrounding cables, and a certain magnetic field is formed around the cables if the cables are electrified. The antenna module Ei continuously senses, firstly processes signals received by sensing through input impedance R5, then sends the signals to the grid electrode of the primary amplifying field effect transistor Q1 to carry out filtering and amplifying treatment, and then sequentially amplifies the signals amplified for the first time through the intermediate-stage amplifying triode Q2 and the final-stage driving triode Q3. If the received magnetic field effect meets the LS working condition of the buzzer after being amplified, the cable body is judged to be electrified, so that workers are reminded of careful treatment, and the personal safety of the operators is ensured. Meanwhile, the feasible distance of detection can be adjusted through the sensitive resistor R6, so that different measurement requirements are met.
Claims (5)
1. A portable cable check-up and cable live detector, its characterized in that: the device comprises a box body, wherein a calibration line and a live detection circuit board are arranged in the box body, a plurality of groups of calibration line visual rows are arranged on the box body, and a calibration line manual switch, a live detection acousto-optic alarm mechanism and a live detection antenna are also arranged on the box body;
each group of the line correcting visual rows comprises a starting end binding post, a self-checking display lamp, a line correcting display lamp and a tail end binding post;
the wire calibrating and live detection circuit board comprises a power supply module, a power supply control module, a wire calibrating self-detection and detection module and a live detection alarm module, wherein a power supply connection port of the power supply module is used for being connected with mains supply, power supply ports of the power supply module are respectively connected with power supply input ends of the power supply control module and the live detection alarm module, and a power supply end of the power supply control module is connected with a power connection end of the wire calibrating self-detection and detection module;
the power supply module comprises a three-terminal voltage-stabilizing integrated circuit, a power input port of the three-terminal voltage-stabilizing integrated circuit is connected with a mains voltage, and a power input end of the three-terminal voltage-stabilizing integrated circuit is also connected with a cathode of the chargeable and dischargeable battery pack through a first capacitor; the power output end of the three-terminal voltage-stabilizing integrated circuit is connected with the positive electrode of the chargeable and dischargeable battery pack through a first voltage drop diode, the negative electrode of the chargeable and dischargeable battery pack is connected with the grounding end of the three-terminal voltage-stabilizing integrated circuit, and the positive electrode and the negative electrode of the chargeable and dischargeable battery pack are used as power supply ports of a power supply module;
the power supply control module comprises a wire calibration manual switch and a singlechip, wherein a power supply access end of the singlechip is connected with the anode of the chargeable and dischargeable battery pack through the wire calibration manual switch, the power supply access end of the singlechip is also connected with the cathode of the chargeable and dischargeable battery pack through an input filter capacitor, a first pin of the singlechip is connected with the wire calibration self-checking and detecting module through an oscillating circuit and a second voltage drop diode in sequence, a second pin of the singlechip is connected with the cathode of the chargeable and dischargeable battery pack through a voltage division resistance circuit and an output filter capacitor, and the cathode of the second voltage drop diode and the cathode of the chargeable and dischargeable battery pack are used as power supply ends of the wire calibration self-checking and detecting module;
the wire calibrating self-checking and detecting module comprises a plurality of groups of wire calibrating display circuits which are connected in parallel, each group of wire calibrating display circuits comprises a first voltage dividing resistor, a self-checking display diode and a wire calibrating display diode which are sequentially connected in series, the wire calibrating display diode is connected with a second voltage dividing resistor in parallel, a starting end connecting terminal is arranged between the first voltage dividing resistor and the self-checking display diode, and a tail end connecting terminal is arranged between the self-checking display diode and the wire calibrating display diode; the left end of the first voltage dividing resistor is connected with the cathode of the second voltage drop diode, and the cathode of the line correction display diode is connected with the cathode of the chargeable and dischargeable battery;
the charged body detection alarm module comprises a charged detection switch, an antenna module, a signal processing amplification module and an audible and visual alarm module, wherein the positive electrode of the chargeable and dischargeable battery pack is connected with the signal processing amplification module through the charged detection switch, the signal output end of the antenna module is connected with the signal processing amplification module through input impedance, and the signal processing amplification module is connected with the audible and visual alarm module.
2. The portable cable verification and cable live detector of claim 1, wherein: the visual row of school line set up 10 groups, the visual row of school line of every group top binding post, self-checking display lamp, school line display lamp and terminal binding post in the visual row of school line arrange in proper order from top to bottom and set up, and the visual row of school line of every group is horizontal arrangement in proper order.
3. The portable cable verification and cable live detector of claim 1, wherein: the self-checking display diode is a self-checking display lamp, and the line checking display diode is a line checking display lamp.
4. The portable cable verification and cable live detector of claim 1, wherein: the signal processing amplifying module comprises a primary amplifying field effect transistor, a middle-stage amplifying triode and a final-stage driving triode, wherein a grid electrode of the primary amplifying field effect transistor is connected with a signal output end of the antenna module through input impedance, the grid electrode of the primary amplifying field effect transistor is also connected with a negative electrode of the chargeable and dischargeable cell group through a sensitive resistor, a drain electrode of the primary amplifying field effect transistor is connected with a charged detection switch through a first resistor, a drain electrode of the primary amplifying field effect transistor is also connected with a base electrode of the middle-stage amplifying triode, a source electrode of the primary amplifying field effect transistor is connected with a negative electrode of the chargeable and dischargeable cell group, a collector electrode of the middle-stage amplifying triode is connected with the charged detection switch through a second resistor, an emitter electrode of the middle-stage amplifying triode is connected with a base electrode of the final-stage driving triode through a third resistor, a collector electrode of the final-stage amplifying triode is connected with a negative electrode of the chargeable and dischargeable cell group through a filter capacitor, and a collector electrode of the final-stage driving triode is connected with the charged detection switch through an acousto-optic alarm module.
5. The portable cable verification and cable live detector of claim 4, wherein: the audible and visual alarm module adopts a buzzer and a light emitting diode.
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| CN201710439500.9A CN107390083B (en) | 2017-06-12 | 2017-06-12 | Portable cable check-up and cable electrified detector |
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| CN201710439500.9A CN107390083B (en) | 2017-06-12 | 2017-06-12 | Portable cable check-up and cable electrified detector |
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| CN107390083B true CN107390083B (en) | 2024-02-23 |
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| CN112857427A (en) * | 2021-01-04 | 2021-05-28 | 柳州柳新汽车冲压件有限公司 | Mold signal detection circuit and device based on automation |
| CN113884836A (en) * | 2021-10-29 | 2022-01-04 | 国网河南省电力公司检修公司 | Cable secondary line calibration instrument |
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