CN214540074U

CN214540074U - Multifunctional line finder

Info

Publication number: CN214540074U
Application number: CN202120624361.9U
Authority: CN
Inventors: 沈周锋; 黄志刚; 陈志宏; 曾繁建; 李毅冰; 黄少贞
Original assignee: ZHANGZHOU YUSHAN ELECTRONIC MANUFACTURING CO LTD
Current assignee: ZHANGZHOU YUSHAN ELECTRONIC MANUFACTURING CO LTD
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-10-29
Anticipated expiration: 2031-03-26

Abstract

The utility model relates to a multifunctional line finder, which comprises a transmitter and a receiver; the emitter comprises a first controller, an induction emitting module, a clamp emitting module and a direct connection emitting module; the first controller is used for generating a transmitting signal and outputting the transmitting signal through an induction transmitting module or a clamp transmitting module or a direct-connection transmitting module; the receiver includes receiving module, receiving module is used for responding to the transmitted signal, and this seeker has multiple transmitting mode, including directly linking the mode, clamp mode, response mode, and multiple transmitting mode helps the user to select the transmitting mode in a flexible way under different application scenarios, convenient and fast, wide application.

Description

Multifunctional line finder

Technical Field

The utility model relates to a multi-functional line finder belongs to line finder technical field.

Background

The finder usually consists of a transmitter and a receiver and corresponding adaptation lines, and the working principle is as follows: the hunting signal sent by the emitter generates an electric signal field around the loop of the target cable, and the high-sensitivity induction type hunting device is used for quickly identifying the signal field sent by the high-sensitivity induction type hunting device along the loop and at the tail end, so that the cable of the item can be found.

The traditional line hunting mode of the line hunting device is single, different kinds of line hunting devices are needed to be used for hunting under different use scenes, and the use cost is invisibly increased.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that exists among the above-mentioned prior art, the utility model provides a multi-functional line finder has multiple line finder module, can adapt to different use scenes.

The technical scheme of the utility model as follows:

a multifunctional finder comprises a transmitter and a receiver; the emitter comprises a first controller, an induction emitting module, a clamp emitting module and a direct connection emitting module; the induction transmitting module comprises a transmitting coil and a first resonant circuit, the first controller is electrically connected with the input end of the first resonant circuit through a first level switching circuit and one output end of a first selector switch, and the output end of the first resonant circuit is electrically connected with the transmitting coil; the clamp transmitting module comprises a clamp and a second resonant circuit, the first controller is electrically connected with the input end of the second resonant circuit through the first level conversion circuit and the other output end of the first selector switch, and the output end of the second resonant circuit is electrically connected with the input end of the clamp; the direct-connection transmitting module comprises a transmitting terminal, a booster circuit and a digital voltage-regulating power supply, the first controller is electrically connected with the input end of the digital voltage-regulating power supply through a second level conversion circuit, the output end of the digital voltage-regulating power supply is electrically connected with the booster circuit, and the output end of the booster circuit is electrically connected with the transmitting terminal; the first controller is used for generating a transmitting signal and outputting the transmitting signal through an induction transmitting module or a clamp transmitting module or a direct-connection transmitting module; the receiver comprises a receiving module, and the receiving module is used for sensing a transmitting signal.

Further, the receiving module comprises a second controller, a sensing component, a measuring circuit and a loudspeaker circuit; the induction component comprises a first receiving coil, a second receiving coil, a first amplifier, a second amplifier and a second change-over switch which are arranged vertically, the first receiving coil is electrically connected with one input end of the second change-over switch through the first amplifier, the second receiving coil is electrically connected with the other input end of the second change-over switch through the second amplifier, and the output end of the second change-over switch is electrically connected with the input end of the measuring circuit; the measuring circuit comprises a band-pass filter and an amplitude detection circuit, wherein the input end of the band-pass filter is electrically connected with the output end of the second selector switch, the output end of the band-pass filter is electrically connected with the input end of the amplitude detection circuit, and the output end of the amplitude detection circuit is respectively electrically connected with the second controller and the loudspeaker circuit; the loudspeaker circuit comprises an audio amplification circuit and a loudspeaker, wherein the input end of the audio amplification circuit is electrically connected with the output end of the amplitude detection circuit, and the output end of the audio amplification circuit is electrically connected with the loudspeaker; the induction component induces a transmitting signal through the first receiving coil or the second receiving coil, generates an induction electric signal and sends the induction electric signal into the band-pass filter for filtering, the input amplitude detection circuit generates an intensity electric signal, the intensity electric signal is input to the second controller for AD conversion to obtain an intensity value, and the audio amplification circuit controls the volume of the loudspeaker according to the intensity electric signal.

Furthermore, the direct connection transmitting module further comprises a transmitting current detecting circuit, wherein the input end of the transmitting current detecting circuit is electrically connected with the booster circuit, and the output end of the transmitting current detecting circuit is electrically connected with the first controller and is used for detecting the current of the transmitting signal generated on the direct connection transmitting module.

Furthermore, the transmitter and the receiver are both provided with a human-computer interaction module.

The utility model discloses following beneficial effect has:

1. the utility model relates to a multi-functional line finder has multiple transmission mode, including directly linking mode, clamp mode, induction mode, multiple transmission mode helps the user to select transmission mode in a flexible way under the different scene of using, convenient and fast, wide application.

2. The utility model relates to a multi-functional line finder, transmitter have emission current detection circuitry, and the user can in time know emission intensity and is hindered by the measuring line, and convenience of customers adjusts the wiring, realizes seeking line performance maximize.

3. The utility model relates to a multi-functional line finder, receiver have two receiving coil of perpendicular setting, detect the hunting signal in the equidirectional not, utilize geometry knowledge can accurate positioning by survey line buried position, calculation by survey line buried depth.

Drawings

FIG. 1 is a schematic block diagram of the present invention;

fig. 2 is an exemplary diagram of a boost circuit in an embodiment of the present invention;

fig. 3 is an exemplary diagram of a digital voltage-regulated power supply according to an embodiment of the present invention;

FIG. 4 is a schematic view of the use of the pliers;

fig. 5 is a schematic diagram of a receiver.

The reference numbers in the figures are:

1. a transmitter; 11. a first controller; 12. an inductive transmitting module; 121. a transmitting coil; 122. a first resonant circuit; 13. a clamp launch module; 131. clamping; 132. a second resonant circuit; 14. a direct connection transmitting module; 141. a transmitting terminal; 142. a boost circuit; 143. a digital voltage regulating power supply; 144. an emission current detection circuit; 15. a first level shift circuit; 16. a first changeover switch; 17. a second level shift circuit; 2. a receiver; 21. a second controller; 22. an inductive component; 221. a first receiving coil; 222. a second receiving coil; 223. a first amplifier; 224. a second amplifier; 225. a second changeover switch; 23. a measurement circuit; 231. a band-pass filter; 232. an amplitude detection circuit; 24. a speaker circuit; 241. an audio amplification circuit; 242. a loudspeaker.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, a multifunctional finder includes a transmitter 1 and a receiver 2; the transmitter 1 comprises a first controller 11, an induction transmitting module 12, a clamp transmitting module 13 and a direct-connection transmitting module 14; the inductive transmitting module 12 comprises a transmitting coil 121 and a first resonant circuit 122, the first controller 11 is electrically connected to an input terminal of the first resonant circuit 122 through a first level shift circuit 15 and an output terminal of a first switch 16, and an output terminal of the first resonant circuit 122 is electrically connected to the transmitting coil 121; the clamp transmitting module 13 comprises a clamp 131 and a second resonant circuit 132, the first controller 11 is electrically connected to an input terminal of the second resonant circuit 132 through a first level shift circuit 15 and another output terminal of a first switch 16, and an output terminal of the second resonant circuit 132 is electrically connected to an input terminal of the clamp 131; the direct-connected transmitting module 14 includes a transmitting terminal 141, a voltage boost circuit 142 and a digital voltage regulating power supply 143, the first controller 11 is electrically connected to an input terminal of the digital voltage regulating power supply 143 through a second level shift circuit 17, an output terminal of the digital voltage regulating power supply 143 is electrically connected to the voltage boost circuit 142, and an output terminal of the voltage boost circuit 142 is electrically connected to the transmitting terminal 141; the first controller 11 is used for generating a transmitting signal and outputting the transmitting signal through an induction transmitting module 12, a clamp transmitting module 13 or a direct-connection transmitting module 14; the receiver 2 comprises a receiving module, and the receiving module is used for sensing a transmission signal; in the present embodiment, the first controller 11 and the second controller 21 both employ a single chip microcomputer.

Further, the receiving module includes a second controller 21, a sensing component 22, a measuring circuit 23 and a speaker circuit 24; the sensing assembly 22 includes a first receiving coil 221 and a second receiving coil 222, a first amplifier 223, a second amplifier 224, and a second switch 225, which are disposed perpendicular to each other, the first receiving coil 221 is electrically connected to one input terminal of the second switch 225 through the first amplifier 223, the second receiving coil 222 is electrically connected to the other input terminal of the second switch 225 through the second amplifier 224, and an output terminal of the second switch 225 is electrically connected to an input terminal of the measuring circuit 23; the measuring circuit 23 includes a band-pass filter 231 and an amplitude detection circuit 232, an input end of the band-pass filter 231 is electrically connected with an output end of the second switch 225, an output end of the band-pass filter 231 is electrically connected with an input end of the amplitude detection circuit 232, and an output end of the amplitude detection circuit 232 is electrically connected with the second controller 21 and the speaker circuit 24, respectively; the speaker circuit 24 includes an audio amplifier circuit 241 and a speaker 242, an input end of the audio amplifier circuit 241 is electrically connected to an output end of the amplitude detection circuit 232, and an output end of the audio amplifier circuit 241 is electrically connected to the speaker 242; the sensing component 22 senses the transmitting signal through the first receiving coil 221 or the second receiving coil 222, generates a sensing electric signal and sends the sensing electric signal into the band-pass filter 231 for filtering, and then the sensing electric signal is input into the amplitude detection circuit 232 to generate an intensity electric signal, the intensity electric signal is input into the second controller 21 to be subjected to AD conversion to obtain an intensity value, and the audio amplification circuit 241 controls the volume of the loudspeaker 242 according to the intensity electric signal.

Further, the direct connection transmitting module 14 further includes a transmitting current detecting circuit 144, an input end of the transmitting current detecting circuit 144 is electrically connected to the voltage boosting circuit 142, and an output end of the transmitting current detecting circuit 144 is electrically connected to the first controller 11, and is configured to detect a current magnitude of a transmitting signal generated on the direct connection transmitting module 14; referring to fig. 2, a specific implementation circuit of the voltage divider circuit is provided in this embodiment; the primary sides of the Q1, R1, Q2, R2 and Tran1 transformers form a differential drive circuit, nodes Sig1 and Sig2 are respectively connected with a signal source, and the phase difference of the signals is 180 degrees. And the Q1 and the Q2 are alternately conducted to provide alternating current for the primary side of the transformer. The secondary side of the transformer Tran1 generates an induced voltage current, which is output through Port1 and Port2, and Port1 and Port2 are output terminals 141. C1 is a dc blocking capacitance. R3 is a shunt resistor, and Tran1 primary side current generated by the alternate conduction of Q1 and Q2 flows through R3 and is converted into voltage. R4 and C2 constitute a resistance-capacitance filter circuit, and the voltage signal of the shunt resistor R3 is converted into a voltage average value and input into the in-phase proportional amplifying circuit. The emission current detection circuit 144 is an in-phase proportional amplification circuit composed of U1 and R5-R7, and the Ad1 is connected with an AD conversion circuit, so that a numerical value proportional to the output current of the emitter can be obtained. The first controller 11 controls the digitally adjustable power supply 143 to adjust the +12V node voltage, i.e., to control the emission intensity of the Port1 and Port2 terminals.

Referring to fig. 3, this embodiment provides a specific implementation circuit of the digitally tunable power supply circuit 143, where VCC is a total power supply, PowerSw is connected to a single chip, and when PowerSw is equal to 1, the +12V node is enabled, otherwise, the +12V node has no output. The PowerPwm is connected with the singlechip, the singlechip generates a square wave of 30kHz, and the voltage of a +12V node can be changed by changing the duty ratio. The larger the duty ratio, the lower the +12V point voltage.

Further, the transmitter 1 and the receiver 1 are both provided with a human-computer interaction module, referring to fig. 1, in this embodiment, the human-computer interaction module is a key circuit and a display circuit.

The principle of use of this embodiment is as follows:

referring to fig. 4, taking the clamp transmitter module 13 as an example, the clamp transmitter module 13 is internally formed by serially connecting a capacitor and an inductor. When a user selects a clamp transmitting mode through the man-machine interaction module, the output end of the first switch 16 is connected with the clamp transmitting module 13, the first controller 11 generates series resonance through the first level conversion circuit 15 and a hunting signal applied to the first level conversion circuit, and the first resonant circuit 132 generates alternating current in the first controller, and the alternating current in the inductance coil can enable a closed loop formed by a measured circuit and the ground to generate corresponding alternating current by utilizing the electromagnetic induction principle. When the receiver 2 is close to the tested line, the alternating current can be induced, and the purpose of line searching is achieved. The transmission principle of the coil transmission module 12 is similar to that of the clamp transmission module 13.

When a user selects a direct connection mode through the man-machine interaction module, the first controller 11 generates a 2 kHz-33 kHz hunting signal, sends the hunting signal into the second level conversion circuit 17, drives the digital voltage regulating power source 143 to generate a corresponding waveform, boosts the hunting signal in the boosting circuit 142, and transmits the hunting signal through the transmitting terminal 141.

In this embodiment, the first receiving coil 221 and the second receiving coil 222 adopt two wire-wound inductors, which are respectively horizontally and vertically disposed to serve as receiving heads for magnetic fields in two directions, so as to form two detection channels. The weak seek signal amplitude is enhanced by pre-amplification through the first amplifier 223 and the second amplifier 224. The noise interference outside the hunting signal band is then filtered out by a band pass filter 231. And the amplitude detection circuit 232 detects the strength of the hunting signal, and the hunting signal is sent to the second controller 21 for AD conversion on the one hand, and is sent to the audio amplification circuit 241 for controlling the volume of the speaker 242 for playing the prompt tone on the other hand. When the line finder is used for finding straight wires, a user reasonably adjusts the position of the receiver 2, and accurate positioning can be realized. Referring to fig. 5, when an alternating current is applied to a line under test by using a transmitter 1, a circular hunting magnetic field is generated. By appropriately adjusting the position of the receiver 2, as shown in fig. 5, in the case of fig. 5, the sensing channel of the first receiving coil 221 in the horizontal direction can detect a strong signal, and the sensing channel of the second receiving coil 222 in the vertical direction can hardly detect a seek signal. The user can constantly switch two channels, observe the signal intensity difference of the two channels, and can accurately position the position of the detected line.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A multifunctional finder is characterized in that: comprises a transmitter (1) and a receiver (2); the emitter (1) comprises a first controller (11), an induction emitting module (12), a clamp emitting module (13) and a direct connection emitting module (14); the induction transmitting module (12) comprises a transmitting coil (121) and a first resonant circuit (122), the first controller (11) is electrically connected with an input end of the first resonant circuit (122) through a first level conversion circuit (15) and an output end of a first switch (16), and an output end of the first resonant circuit (122) is electrically connected with the transmitting coil (121); the clamp transmitting module (13) comprises a clamp (131) and a second resonant circuit (132), the first controller (11) is electrically connected with an input end of the second resonant circuit (132) through a first level conversion circuit (15) and the other output end of the first switch (16), and an output end of the second resonant circuit (132) is electrically connected with an input end of the clamp (131); the direct-connection transmitting module (14) comprises a transmitting terminal (141), a boosting circuit (142) and a digital voltage-regulating power supply (143), the first controller (11) is electrically connected with the input end of the digital voltage-regulating power supply (143) through a second level conversion circuit (17), the output end of the digital voltage-regulating power supply (143) is electrically connected with the boosting circuit (142), and the output end of the boosting circuit (142) is electrically connected with the transmitting terminal (141); the first controller (11) is used for generating a transmitting signal and outputting the transmitting signal through an induction transmitting module (12), a clamp transmitting module (13) or a direct-connection transmitting module (14); the receiver (2) comprises a receiving module for sensing the transmitted signal.

2. The multifunctional finder of claim 1, wherein: the receiving module comprises a second controller (21), a sensing component (22), a measuring circuit (23) and a loudspeaker circuit (24); the induction component (22) comprises a first receiving coil (221) and a second receiving coil (222) which are arranged perpendicular to each other, a first amplifier (223), a second amplifier (224) and a second switch (225), wherein the first receiving coil (221) is electrically connected with one input end of the second switch (225) through the first amplifier (223), the second receiving coil (222) is electrically connected with the other input end of the second switch (225) through the second amplifier (224), and the output end of the second switch (225) is electrically connected with the input end of the measuring circuit (23); the measuring circuit (23) comprises a band-pass filter (231) and an amplitude detection circuit (232), wherein the input end of the band-pass filter (231) is electrically connected with the output end of the second switch (225), the output end of the band-pass filter (231) is electrically connected with the input end of the amplitude detection circuit (232), and the output end of the amplitude detection circuit (232) is electrically connected with the second controller (21) and the loudspeaker circuit (24) respectively; the loudspeaker circuit (24) comprises an audio amplification circuit (241) and a loudspeaker (242), wherein the input end of the audio amplification circuit (241) is electrically connected with the output end of the amplitude detection circuit (232), and the output end of the audio amplification circuit is electrically connected with the loudspeaker (242); the induction component (22) induces and emits signals through the first receiving coil (221) or the second receiving coil (222), generates induction electric signals, sends the induction electric signals into the band-pass filter (231) for filtering, then inputs the induction electric signals into the amplitude detection circuit (232) to generate intensity electric signals, the intensity electric signals are input into the second controller (21) to be subjected to AD conversion to obtain intensity values, and the audio amplification circuit (241) controls the volume of the loudspeaker (242) according to the intensity electric signals.

3. The multifunctional finder of claim 1, wherein: the direct connection transmitting module (14) further comprises a transmitting current detection circuit (144), wherein the input end of the transmitting current detection circuit (144) is electrically connected with the boosting circuit (142), and the output end of the transmitting current detection circuit is electrically connected with the first controller (11) and is used for detecting the current of a transmitting signal generated on the direct connection transmitting module (14).

4. The multifunctional finder of claim 1, wherein: and the transmitter (1) and the receiver (2) are both provided with a human-computer interaction module.