CN221406060U

CN221406060U - Portable underground cable walk to tester

Info

Publication number: CN221406060U
Application number: CN202323432162.6U
Authority: CN
Inventors: 雷鸣; 张建平
Original assignee: Yongzhou Nuofangzhou Electronic Technology Co ltd
Current assignee: Yongzhou Nuofangzhou Electronic Technology Co ltd
Priority date: 2023-12-15
Filing date: 2023-12-15
Publication date: 2024-07-23
Anticipated expiration: 2033-12-15

Abstract

The utility model discloses a portable underground cable routing tester, wherein a host comprises a central control module, a signal processing module, a signal transmitting module and a host power module, wherein the signal processing module is connected to a data end of the central control module, the signal transmitting module is connected to the signal processing module, and the host power module is used for supplying power to the host; the auxiliary machine part comprises a probe interface, a filtering module, an amplifying module, an alarm module and an auxiliary machine power module, wherein the probe is connected with the input end of the filtering module, the output end of the filtering module is connected with the input end of the amplifying module, the output end of the amplifying module is connected with the input end of the alarm module, and the auxiliary machine power module is used for supplying power to the auxiliary machine. The transmitter and the receiver in the utility model adopt small and exquisite structural design, are simple to operate, and solve the defects that heavy instruments and equipment are needed in the past, and the trend can be determined only by finding the two ends of the target cable in the operation of multiple persons.

Description

Portable underground cable walk to tester

Technical Field

The utility model discloses underground cable routing finding equipment, in particular to a portable underground cable routing tester.

Background

With the development of urban design, various cables, pipelines and the like are laid in a buried mode, so that pipelines become denser and more complex.

How to find, detect, locate desired cables and pipes, etc. in complex environments without damaging the ground has become a problem to be considered in construction or maintenance procedures. However, the conventional buried cable detection technology cannot accurately position the depth and the trend of the buried cable, and the instrument is heavy, requires multiple people to operate, and can determine the trend only by finding the two ends of the target cable.

Disclosure of Invention

Aiming at the defect that the buried cable detection technology in the prior art can not accurately position the depth and trend of the buried cable, the utility model provides a portable underground cable trend tester which adopts a matched structural design of a transmitter and a receiver and is simple to operate.

The technical scheme adopted for solving the technical problems is as follows: a portable underground cable routing tester, wherein,

The host comprises a central control module, a signal processing module, a signal transmitting module and a host power module, wherein the signal processing module is connected to the data end of the central control module, the signal transmitting module is connected to the signal processing module, and the host power module is used for supplying power to the host;

The auxiliary machine part comprises a probe interface, a filtering module, an amplifying module, an alarm module and an auxiliary machine power module, wherein the probe is connected with the input end of the filtering module, the output end of the filtering module is connected with the input end of the amplifying module, the output end of the amplifying module is connected with the input end of the alarm module, and the auxiliary machine power module is used for supplying power to the auxiliary machine.

The technical scheme adopted by the utility model for solving the technical problems further comprises the following steps:

The signal processing module comprises a MOS transistor Q7, a MOS transistor Q4, a MOS transistor Q5, a triode Q6 and a triode Q3, wherein the grid electrode of the MOS transistor Q7 is the signal input end of the signal processing module, the grid electrode of the MOS transistor Q7 is connected with the data end of the central control module through a resistor C12, the source electrode of the MOS transistor Q7 is grounded, the drain electrode of the MOS transistor Q7 is connected with a +9V power supply through a resistor R17 connected in series, the grid electrodes of the MOS transistor Q4 and the MOS transistor Q5 are respectively connected with the drain electrode of the MOS transistor Q7, the drain electrode of the MOS transistor Q4 is connected with a +9V power supply, the drain electrode of the MOS transistor Q5 is grounded, the source electrode of the MOS transistor Q4 is connected with the source electrode of the MOS transistor Q5 through a resistor C11 and a resistor R14 connected in series, the capacitor C13 and an inductor L4 are connected in series, the base electrode of the MOS transistor Q6 is connected with a +9V power supply through a resistor R15 in parallel, the resistor R6 is connected with the drain electrode of the MOS transistor Q6 in series through a resistor R3 and a resistor R3, the drain electrode of the MOS transistor Q4 is connected with the resistor C3 in series, the resistor C3 is connected with the resistor C3 through a resistor R3 and the resistor R3 connected in series, the drain electrode of the MOS transistor Q4 is connected with the resistor Q4 in series, the base electrode of the MOS transistor Q4 is connected with the base electrode of the transistor Q3 through a resistor Q3 in series, the resistor Q3 through the resistor C11 and the resistor C3.

The host power module comprises a host USB interface, a host charging management module, a host lithium battery, a host power management module and a voltage stabilizing module, wherein the host USB interface is connected with the power input end of the host charging management module, and the host lithium battery is connected with the power output end of the host charging management module.

The host also comprises a battery voltage detection module, the battery voltage detection module comprises a resistor R9 and a resistor R10, the resistor R9 and the resistor R10 are connected in series between the anode of the lithium battery of the host and the ground, and the common end of the resistor R9 and the resistor R10 is connected with one data end of the central control module.

The host also comprises a power-on indication module, the power-on indication module comprises two-color LED lamps LED2 and a MOS tube Q2, a grid electrode of the MOS tube Q2 is connected with a CHRG interface of the host charging management module, a source electrode of the MOS tube Q2 is connected with a positive power end of the USB interface, a drain electrode of the MOS tube Q2 is connected with one of the two-color LED lamps LED2, and the other one of the two-color LED lamps LED2 is connected with a +9V power supply.

The host also comprises a switch SW1, the output end of the host power management module is connected with an LED11 of the work indicator lamp through the switch SW1, and the LED11 of the work indicator lamp is connected to the signal transmitting module.

The probe interface is grounded through an adjustable resistor VR1, the middle tap of the adjustable resistor VR1 is grounded through a capacitor C23, a resistor R51 and a capacitor C33 which are connected in series, a resistor R50 and a capacitor C17 are connected between a +9V power supply and the ground in series, the common end of the resistor R50 and the capacitor C17 is connected with the common end of the resistor R51 and the capacitor C33, the capacitor C23 and the resistor R51 are connected with the base electrode of a triode Q5, the emitter electrode of the triode Q5 is grounded through a resistor R29, the collector electrode of the triode Q5 is connected with the +9V power supply through a resistor R28, the collector electrode of the triode Q5 is connected with one end of a primary coil of a middle Zhou Bianya TP1, the other end of the primary coil of the middle Zhou Bianya TP1 is connected with the +9V power supply, one end of a secondary coil of the middle Zhou Bianya TP1 is connected with the +9V power supply through a resistor R26, the other end of the secondary coil of the middle Zhou Bianya TP1 is grounded through a resistor C15, the emitter of the triode Q6 is grounded through a resistor R27, the collector of the triode Q6 is connected with one end of a primary coil of a middle Zhou Bianya device TP2, the other end of the primary coil of the middle Zhou Bianya device TP2 is connected with a +9V power supply, a capacitor C8 is connected in parallel between the two ends of the primary coil of the middle Zhou Bianya device TP2, one end of a secondary coil of the middle Zhou Bianya device TP2 is grounded through a capacitor C14, the end is simultaneously connected with the base of a triode Q7 through a resistor R23, the other end of the secondary coil of the middle Zhou Bianya device TP2 is connected with the base of a triode Q3, the emitter of the triode Q3 is grounded through a resistor R33, the collector of the triode Q3 is connected with the +9V power supply through a resistor R25, the collector of the triode Q7 is connected with the +9V power supply, the emitter of the triode Q7 is connected with an amplifying module through a resistor R34, a resistor R30 and a diode D3 which are connected in series, the capacitor C28 is connected in parallel with the resistor R34 and the resistor R30 connected in series.

The alarm module comprises an audio power amplifier U1 and a loudspeaker BZ1, wherein the output end of the amplification module is connected with the signal input end of the audio power amplifier U1, and the output end of the audio power amplifier U1 is connected with the loudspeaker BZ 1.

The auxiliary machine power supply module comprises an auxiliary machine USB interface, an auxiliary machine charging management module, an auxiliary machine lithium battery and an auxiliary machine power supply management module, wherein the auxiliary machine USB interface is connected with the power supply input end of the auxiliary machine charging management module, the auxiliary machine lithium battery is connected with the power supply output end of the auxiliary machine charging management module, the auxiliary machine also comprises an auxiliary electric charging indication module, the auxiliary electric charging indication module comprises a resistor R2 and a light emitting diode LED1 which are connected in series, and the resistor R2 and the light emitting diode LED1 which are connected in series are connected with the positive power supply end of the USB interface of the auxiliary machine charging management module.

The auxiliary power module further comprises a +9V battery, a switch SW1, a resistor R14 and a light emitting diode LED which are sequentially connected in series are connected between the positive electrode and the negative electrode of the +9V battery, a switch SW2 is connected between the negative electrode of the +9V battery and the ground, the positive electrode of the +9V battery is connected with the source electrode of the MOS tube Q1, the drain electrode of the MOS tube Q1 outputs +9V power, the grid electrode of the MOS tube Q1 is connected with the collector electrode of the triode Q2 through the resistor R9, the emitter electrode of the triode Q2 is grounded, the base electrode of the triode Q2 is connected with the common end of the resistor R1 and the resistor R7, the resistor R1 and the resistor R7 are connected between the positive electrode of the +9V battery and the ground in series, and the resistor R16 and the light emitting diode LED2 are connected between the positive electrode of the +9V battery and the ground in series.

The beneficial effects of the utility model are as follows: the transmitter and the receiver in the utility model adopt small and exquisite structural design, are simple to operate, and solve the defects that heavy instruments and equipment are needed in the past, and the trend can be determined only by finding the two ends of the target cable in the operation of multiple persons. The utility model can accurately find and detect the trend and depth of the underground cable without damaging the ground.

The utility model will be further described with reference to the drawings and detailed description.

Drawings

Fig. 1 is a block diagram of the circuit of the present utility model.

FIG. 2 is a schematic circuit diagram of a portion of a central control module in a host according to the present utility model.

Fig. 3 is a schematic circuit diagram of a first portion of a signal processing module in a host according to the present utility model.

Fig. 4 is a schematic circuit diagram of a second portion of the signal processing module and a portion of the signal transmitting module in the host according to the present utility model.

FIG. 5 is a schematic diagram of a USB interface in a host according to the present utility model.

Fig. 6 is a schematic circuit diagram of a portion of a power module in a host according to the present utility model.

Fig. 7 is a schematic circuit diagram of a switch portion of the host of the present utility model.

FIG. 8 is a schematic circuit diagram of a portion of the power-on indicator module and the voltage detection module in the host computer of the present utility model.

Fig. 9 is a schematic circuit diagram of a portion of a buck module in a host according to the present utility model.

Fig. 10 is a schematic circuit diagram of a portion of a power switch module in a secondary unit according to the present utility model.

Fig. 11 is a schematic circuit diagram of a portion of an audio power amplifier module in a secondary unit according to the present utility model.

Fig. 12 is a schematic circuit diagram of a part of a filter module in the auxiliary machine according to the present utility model.

Fig. 13 is a schematic circuit diagram of a part of an amplifying module in the auxiliary machine of the present utility model.

Fig. 14 is a schematic circuit diagram of a portion of a charge management module in a secondary unit according to the present utility model.

Fig. 15 is a schematic circuit diagram of a portion of a boost module in a slave unit according to the present utility model.

Fig. 16 is a schematic diagram showing a receiving circuit for confirming the cable routing according to the present utility model.

Detailed Description

This example is a preferred embodiment of the present utility model, and other principles and basic structures are the same as or similar to those of this example, and all fall within the scope of the present utility model.

Referring to fig. 1 to 15 in combination, the present utility model mainly includes a main unit and an auxiliary unit, wherein the main unit is mainly a transmitting circuit, the auxiliary unit is also called a mobile phone auxiliary unit, and is mainly a receiving circuit,

The host part comprises a central control module, a signal processing module, a signal transmitting module and a host power module, wherein the signal processing module is connected to the data end of the central control module, the central control module transmits PWM waves to the signal processing module, the signal transmitting module is connected to the signal processing module, the signal processing module amplifies the PWM waves and then transmits the amplified PWM waves to the signal transmitting module, and the host power module is used for supplying power to the host;

In this embodiment, the central control module adopts a small-sized single-chip microcomputer U5 with the model of HT66F2050, and can also be replaced by single-chip microcomputers with other models when in specific implementation.

The signal processing module comprises a MOS tube Q7, a MOS tube Q4, a MOS tube Q5, a triode Q6 and a triode Q3, wherein the grid electrode of the MOS tube Q7 is the signal input end of the signal processing module, the grid electrode of the MOS tube Q7 is connected with the data end (namely MCU_SCAN interface) of the central control module through a resistor C12, the source electrode of the MOS tube Q7 is grounded, the drain electrode of the MOS tube Q7 is connected with a +9V power supply through a resistor R17 connected in series, the grid electrodes of the MOS tube Q4 and the MOS tube Q5 are respectively connected with the drain electrode of the MOS tube Q7, the drain electrode of the MOS tube Q4 is connected with the +9V power supply, the drain electrode of the MOS tube Q5 is grounded, the source electrode of the MOS tube Q4 is connected with the base electrode of the triode Q6 through a resistor C11 and a resistor R14 connected in series, a capacitor C13 and an inductor L4 connected in series are connected in parallel with the resistor R14, the base of the triode Q6 is connected with a +9V power supply through a resistor R15, the emitter of the triode Q6 is grounded through a resistor R13, the collector of the triode Q6 is connected with the +9V power supply through a resistor R12 and an inductor L6 which are connected in series, the collector of the triode Q6 is connected with the base of the triode Q3 through a capacitor C8 and an inductor L5 which are connected in series, the emitter of the triode Q3 is grounded through an adjustable resistor VR1 which is connected in series, the middle tap of the adjustable resistor VR1 is grounded through a resistor R5, the collector of the triode Q3 is connected with the +9V power supply through an inductor L3, the base of the triode Q3 is connected with the signal transmitting module through a resistor R11, an inductor L2, a capacitor C7 and a thermistor PTC1 which are connected in series in sequence, and the common end of the resistor R11 and the inductor L2 is connected with the collector of the triode Q3, and the common end of the capacitor C7 and the thermistor PTC1 is grounded through a capacitor C9 and the inductor L1 which are connected in series. In this embodiment, the signal transmitting module adopts an interface, and is used for connecting with a transmitting probe to transmit the detection signal.

The transmitting circuit sends PWM waves with certain frequency and is matched with the receiving circuit, and only stable signal output can better measure the cable running direction and depth, so that an LC frequency-selecting network in the transmitting signal is required to have reliable frequency-selecting characteristics, and the selected parameters cannot be too large or too small. Frequency selection frequency calculation formula: QUOTE A In this embodiment, the capacitor C13 and the inductor L4 connected in series form a first LC frequency-selecting network, and the capacitor C8 and the inductor L5 connected in series form a second LC frequency-selecting network.

Because the potentiometer VR2 is used to adjust the intensity of the transmitted signal, when the resistor R5 limits the maximum current in the line, the resistor R5 plays a role in protecting the triode Q3, however, the value of the resistor R5 cannot be too large, which can lead to the amplitude of the transmitted signal being reduced when the transmitted signal is maximum, thereby leading the signal not to be captured by the receiver probe and reducing the maximum distance of the direction of the measurement cable.

In this embodiment, the host power module includes a host USB interface, a host charging management module, a host lithium battery, a host power management module and a voltage stabilizing module, where the host USB interface is connected with a power input end of the host charging management module, the host lithium battery is connected with a power output end of the host charging management module, the host USB interface is used for power input, an input power charges the host lithium battery through the host charging management module, the power input end of the host power management module is connected with the host lithium battery, and the host lithium battery output power is converted into +9v power for power supply through the host power management module, in this embodiment, the voltage stabilizing module selects a voltage stabilizing chip U3 with a model ME6209a50PG, and can convert the +9v power into +5v power for power supply to the central control module.

In this embodiment, the host further includes a battery voltage detection module, where the battery voltage detection module includes a resistor R9 and a resistor R10, where the resistor R9 and the resistor R10 are connected in series between the positive electrode of the host lithium battery and ground, and a common terminal of the resistor R9 and the resistor R10 is connected to a data terminal of the central control module, where the data terminal has an ADC function.

In this embodiment, still including the instruction module that goes up in the host computer, the instruction module that goes up includes bicolor LED lamp LED2 and MOS pipe Q2, MOS pipe Q2's grid and host computer charge management module's CHRG interface connection, MOS pipe Q2's source electrode is connected with the positive power supply end of USB interface, MOS pipe Q2's drain electrode is connected with one of bicolor LED lamp LED2, another of bicolor LED lamp LED2 is connected with +9V power, when the power is accessed, corresponding LED can light in the bicolor LED lamp LED 2.

In this embodiment, the host further includes a switch SW1, and the output end of the host power management module is connected to the working indicator LED11 through the switch SW1, where the working indicator LED11 is connected to the signal transmitting module and is used for indicating the working state of the host.

In this embodiment, the probe interface is used to connect to a signal receiving probe, the probe interface is grounded through an adjustable resistor VR1, the middle tap of the adjustable resistor VR1 is grounded through a capacitor C23, a resistor R51 and a capacitor C33 connected in series, a resistor R50 and a capacitor C17 are connected in series between a +9v power supply and ground, the common end of the resistor R50 and the capacitor C17 is connected to the common end of the resistor R51 and the capacitor C33, the resistor C23 and the resistor R51 are connected to the base of a triode Q5, the emitter of the triode Q5 is grounded through a resistor R29, the collector of the triode Q5 is connected to the +9v power supply through a resistor R28, the collector of the triode Q5 is connected to one end of the primary coil of a medium Zhou Bianya TP1, the other end of the primary coil of the medium Zhou Bianya TP1 is connected to the +9v power supply, one end of the secondary coil of the medium Zhou Bianya TP1 is connected to the +9v power supply through a resistor R26, the end is simultaneously grounded through a resistor C15, the other end of the secondary coil of the middle Zhou Bianya TP1 is connected with the base electrode of the triode Q6, the emitter electrode of the triode Q6 is grounded through a resistor R27, the collector electrode of the triode Q6 is connected with one end of the primary coil of the middle Zhou Bianya TP2, the other end of the primary coil of the middle Zhou Bianya TP2 is connected with a +9V power supply, a capacitor C8 is connected in parallel between the two ends of the primary coil of the middle Zhou Bianya TP2, one end of the secondary coil of the middle Zhou Bianya TP2 is grounded through a capacitor C14, the end is simultaneously connected with the base electrode of the triode Q7 through a resistor R23, the other end of the secondary coil of the middle Zhou Bianya TP2 is connected with the base electrode of the triode Q3, the emitter electrode of the triode Q3 is grounded through a resistor R33, the collector electrode of the triode Q3 is connected with a +9V power supply through a resistor R25, the collector electrode of the triode Q7 is connected with the +9V power supply, the emitter electrode of the triode Q7 is connected with the amplifying module through a resistor R34, a resistor R30 and a diode D3 which are connected in series, the capacitor C28 is connected in parallel with the resistor R34 and the resistor R30 connected in series. The Zhou Bianya device is an intermediate frequency transformer, the Zhou Bianya device is a transformer with a fixed resonant circuit which is special in a superheterodyne receiving device, but the resonant circuit can be finely tuned in a certain range, so that an accurate resonant frequency can be still achieved after the circuit is connected, and the fine tuning is completed by means of a fine tuning capacitor or a change of the relative position of a magnetic core.

The input-in Zhou Bianya TP1 and the output-in Zhou Bianya TP2 are selected to be close to the frequency of the signal output by the transmitter, the center frequency is 455KHz, the small signal detected by the probe is filtered and frequency-selected and adjusted through the input-in Zhou Bianya TP1 and the output-in Zhou Bianya TP2, a clean receiving signal is obtained, and the signal is amplified under the action of the amplifier U4. The amplified signal is converted from an electric signal to an acoustic signal through the functions of the audio power amplifier U6 and the loudspeaker.

In this embodiment, the amplifying module adopts a two-stage amplifier formed by connecting an operational amplifier U4 with a model RS6332, amplifies an emitter output signal of a triode Q7, and outputs an alarm module, and the +9v power supply provides a reference voltage for a non-inverting input terminal of the operational amplifier U4 after being divided by a voltage dividing resistor R44 and a voltage dividing resistor R43.

In this embodiment, the alarm module includes an audio power amplifier U1 and a speaker BZ1, the output end of the amplification module is connected to the signal input end of the audio power amplifier U1, and the output end of the audio power amplifier U1 is connected to the speaker BZ 1.

In this embodiment, auxiliary engine power module includes auxiliary engine USB interface, auxiliary engine charge management module, auxiliary engine lithium cell and auxiliary engine power management module, auxiliary engine USB interface is connected with auxiliary engine charge management module's power input, auxiliary engine lithium cell is connected with auxiliary engine charge management module's power output, auxiliary engine USB interface is used for power input, input power charges for auxiliary engine lithium cell through auxiliary engine charge management module, auxiliary engine power management module's power input is connected with auxiliary engine lithium cell, through auxiliary engine power management module with auxiliary engine lithium cell output power conversion +9V power supply for the auxiliary engine.

In this embodiment, the auxiliary machine further includes an auxiliary electric charging indication module, where the auxiliary electric charging indication module includes a resistor R2 and a light emitting diode LED1 connected in series, and the resistor R2 and the light emitting diode LED1 connected in series are connected to a CHRG interface of the auxiliary machine charging management module and a positive power supply end of the USB interface.

In this embodiment, the auxiliary power module further includes a +9v battery, where the positive electrode and the negative electrode of the +9v battery are connected with a switch SW1, a resistor R14 and a light emitting diode LED that are sequentially connected in series, and a switch SW2 is connected between the negative electrode of the +9v battery and the ground. The positive pole of +9V battery is connected with the source electrode of MOS pipe Q1, and the drain electrode of MOS pipe Q1 exports +9V power, and MOS pipe Q1's grid is connected with triode Q2's collecting electrode through resistance R9, and triode Q2's projecting pole ground, triode Q2's base are connected at resistance R1 and resistance R7's public end, and resistance R1 and resistance R7 series connection are between +9V battery's positive pole and ground.

In this embodiment, a resistor R16 and a light emitting diode LED2 connected in series are connected between the positive electrode of the +9v battery and the ground.

The utility model relates to a test principle that a transmitting probe of a transmitting circuit is connected to one end of an underground cable during test, and an audio signal is added to the underground cable, so that a magnetic field is generated around the underground cable to be tested and is transmitted to the ground through the ground. The receiver is held by hand, so that the probe is freely hung down, the position of the probe is moved, and the magnetic force lines are cut by the probe coil. The more distant the underground cable is, the more sparse the distribution of magnetic lines of force is, and the weaker the received signal is, so that the approximate position range of the underground cable can be determined with greater sensitivity, then the sensitivity is continuously reduced, the approximate position range of the underground cable is continuously reduced again, and finally the accurate position of the underground cable is determined. Referring to fig. 16 in combination, the receiving circuit is able to receive a signal when it is at position 1, and the sensitivity is reduced so that no signal is received at position 1. When the receiving probe is moved, the receiving circuit can receive the signal again when the probe approaches to one side of the cable, the sensitivity is repeatedly reduced again, the possible range of the underground cable can be narrowed to a place where the signal can be received, and finally the position of the underground cable is confirmed.

The utility model, when in use, comprises signal transmission and signal reception:

When transmitting signals, the field effect transistor Q7 is rapidly and intermittently switched on and off by utilizing PWM waves (MCU_SCAN) with specific frequency (455 KHz) transmitted by the singlechip, the MOS transistor Q4 and the MOS transistor Q5 adopt push-pull circuits when amplifying output signals, the switching loss is reduced, the efficiency is improved, and the switching speed is also improved while the load capacity of the circuits is increased. The signal is output to the triode Q6 through the LC frequency-selecting network, the signal is amplified under the action of the triode Q6, frequency selection is carried out again under the action of the capacitor C8 and the inductor L5, the signal is output to the probe, and the size of the output signal is controlled through the potentiometer VR1 connected in series with the emitter of the triode Q3.

When receiving signals, the receiving circuit adjusts the signal sensitivity of the receiver circuit through the potentiometer VR1 by the weak signals received. Meanwhile, the received signals are transmitted to the input-medium Zhou Bianya TP1, the input-medium Zhou Bianya TP1 is used for coupling signals transmitted by the probe to the resonant circuit, frequency selection adjustment is carried out, and loop inductance parameters achieve the effects of filtering interference and amplifying small signals. The signal processed by the Zhou Bianya TP1 in input is coupled to the Zhou Bianya TP2 in output, and the Zhou Bianya TP2 in output mainly plays roles of changing the turn number relation of coils and changing the phase balance of the loudspeaker BZ1, so that the sound generated by the audio current emitted by the loudspeaker BZ1 is matched with the waveform received by the probe, and the audio output is clear and has no noise. The micro signal processed by the Zhou Bianya TP2 in the output needs to be amplified by the amplifier U4 and input to the audio power amplifier U6, and then the speaker BZ1 is driven to give out an audio prompt.

The transmitter and the receiver in the utility model adopt small and exquisite structural design, are simple to operate, and solve the defects that heavy instruments and equipment are needed in the past, and the trend can be determined only by finding the two ends of the target cable in the operation of multiple persons. The utility model can accurately find and detect the trend and depth of the underground cable without damaging the ground.

Claims

1. A portable underground cable walk to tester, characterized by: the tester comprises a main machine and an auxiliary machine, wherein,

2. The portable underground cable travel direction tester of claim 1, wherein: the signal processing module comprises a MOS transistor Q7, a MOS transistor Q4, a MOS transistor Q5, a triode Q6 and a triode Q3, wherein the grid electrode of the MOS transistor Q7 is the signal input end of the signal processing module, the grid electrode of the MOS transistor Q7 is connected with the data end of the central control module through a resistor C12, the source electrode of the MOS transistor Q7 is grounded, the drain electrode of the MOS transistor Q7 is connected with a +9V power supply through a resistor R17 connected in series, the grid electrodes of the MOS transistor Q4 and the MOS transistor Q5 are respectively connected with the drain electrode of the MOS transistor Q7, the drain electrode of the MOS transistor Q4 is connected with a +9V power supply, the drain electrode of the MOS transistor Q5 is grounded, the source electrode of the MOS transistor Q4 is connected with the source electrode of the MOS transistor Q5 through a resistor C11 and a resistor R14 connected in series, the capacitor C13 and an inductor L4 are connected in series, the base electrode of the MOS transistor Q6 is connected with a +9V power supply through a resistor R15 in parallel, the resistor R6 is connected with the drain electrode of the MOS transistor Q6 in series through a resistor R3 and a resistor R3, the drain electrode of the MOS transistor Q4 is connected with the resistor C3 in series, the resistor C3 is connected with the resistor C3 through a resistor R3 and the resistor R3 connected in series, the drain electrode of the MOS transistor Q4 is connected with the resistor Q4 in series, the base electrode of the MOS transistor Q4 is connected with the base electrode of the transistor Q3 through a resistor Q3 in series, the resistor Q3 through the resistor C11 and the resistor C3.

3. The portable underground cable travel direction tester of claim 1, wherein: the host power module comprises a host USB interface, a host charging management module, a host lithium battery, a host power management module and a voltage stabilizing module, wherein the host USB interface is connected with the power input end of the host charging management module, and the host lithium battery is connected with the power output end of the host charging management module.

4. The portable underground cable travel direction tester of claim 1, wherein: the host also comprises a battery voltage detection module, the battery voltage detection module comprises a resistor R9 and a resistor R10, the resistor R9 and the resistor R10 are connected in series between the anode of the lithium battery of the host and the ground, and the common end of the resistor R9 and the resistor R10 is connected with one data end of the central control module.

5. The portable underground cable travel direction tester of claim 1, wherein: the host also comprises a power-on indication module, the power-on indication module comprises two-color LED lamps LED2 and a MOS tube Q2, a grid electrode of the MOS tube Q2 is connected with a CHRG interface of the host charging management module, a source electrode of the MOS tube Q2 is connected with a positive power end of the USB interface, a drain electrode of the MOS tube Q2 is connected with one of the two-color LED lamps LED2, and the other one of the two-color LED lamps LED2 is connected with a +9V power supply.

6. The portable underground cable travel direction tester of claim 1, wherein: the host also comprises a switch SW1, the output end of the host power management module is connected with an LED11 of the work indicator lamp through the switch SW1, and the LED11 of the work indicator lamp is connected to the signal transmitting module.

7. The portable underground cable travel direction tester of claim 1, wherein: the probe interface is grounded through an adjustable resistor VR1, the middle tap of the adjustable resistor VR1 is grounded through a capacitor C23, a resistor R51 and a capacitor C33 which are connected in series, the resistor R50 and the capacitor C17 are connected between a +9V power supply and the ground in series, the common end of the resistor R50 and the capacitor C17 is connected with the common end of the resistor R51 and the capacitor C33, the capacitor C23 and the resistor R51 are connected with the base electrode of a triode Q5, the emitter electrode of the triode Q5 is grounded through a resistor R29, the collector electrode of the triode Q5 is connected with the +9V power supply through a resistor R28, the collector electrode of the triode Q5 is connected with one end of a primary coil of a middle Zhou Bianya TP1, the other end of the primary coil of the middle Zhou Bianya TP1 is connected with the +9V power supply, one end of a secondary coil of the middle Zhou Bianya TP1 is connected with the +9V power supply through a resistor R26, the other end of the secondary coil of the middle 5357 TP1 is grounded through a resistor C15 at the same time, the other end of the secondary coil of the middle 5357 TP1 is connected with the base electrode of the triode Q6, the emitter of the triode Q6 is grounded through a resistor R27, the collector of the triode Q6 is connected with one end of a primary coil of a middle Zhou Bianya device TP2, the other end of the primary coil of the middle Zhou Bianya device TP2 is connected with a +9V power supply, a capacitor C8 is connected in parallel between the two ends of the primary coil of the middle Zhou Bianya device TP2, one end of a secondary coil of the middle Zhou Bianya device TP2 is grounded through a capacitor C14, the end is simultaneously connected with the base of a triode Q7 through a resistor R23, the other end of the secondary coil of the middle Zhou Bianya device TP2 is connected with the base of a triode Q3, the emitter of the triode Q3 is grounded through a resistor R33, the collector of the triode Q3 is connected with the +9V power supply through a resistor R25, the collector of the triode Q7 is connected with the +9V power supply, the emitter of the triode Q7 is connected with an amplifying module through a resistor R34, a resistor R30 and a diode D3 which are connected in series, the capacitor C28 is connected in parallel with the resistor R34 and the resistor R30 connected in series.

8. The portable underground cable travel direction tester of claim 1, wherein: the alarm module comprises an audio power amplifier U1 and a loudspeaker BZ1, wherein the output end of the amplification module is connected with the signal input end of the audio power amplifier U1, and the output end of the audio power amplifier U1 is connected with the loudspeaker BZ 1.

9. The portable underground cable travel direction tester of claim 1, wherein: the auxiliary machine power supply module comprises an auxiliary machine USB interface, an auxiliary machine charging management module, an auxiliary machine lithium battery and an auxiliary machine power supply management module, wherein the auxiliary machine USB interface is connected with the power supply input end of the auxiliary machine charging management module, the auxiliary machine lithium battery is connected with the power supply output end of the auxiliary machine charging management module, the auxiliary machine also comprises an auxiliary electric charging indication module, the auxiliary electric charging indication module comprises a resistor R2 and a light emitting diode LED1 which are connected in series, and the resistor R2 and the light emitting diode LED1 which are connected in series are connected with the positive power supply end of the USB interface of the auxiliary machine charging management module.

10. The portable underground cable travel direction tester of claim 1, wherein: the auxiliary power module further comprises a +9V battery, a switch SW1, a resistor R14 and a light emitting diode LED which are sequentially connected in series are connected between the positive electrode and the negative electrode of the +9V battery, a switch SW2 is connected between the negative electrode of the +9V battery and the ground, the positive electrode of the +9V battery is connected with the source electrode of the MOS tube Q1, the drain electrode of the MOS tube Q1 outputs +9V power, the grid electrode of the MOS tube Q1 is connected with the collector electrode of the triode Q2 through the resistor R9, the emitter electrode of the triode Q2 is grounded, the base electrode of the triode Q2 is connected with the common end of the resistor R1 and the resistor R7, the resistor R1 and the resistor R7 are connected between the positive electrode of the +9V battery and the ground in series, and the resistor R16 and the light emitting diode LED2 are connected between the positive electrode of the +9V battery and the ground in series.