CN210690569U

CN210690569U - Electromagnetic wave receiver and pipeline cableless detector

Info

Publication number: CN210690569U
Application number: CN201921591336.4U
Authority: CN
Inventors: 杨玉
Original assignee: Dazhou Detec Testing Equipment Co Ltd
Current assignee: Dazhou Detec Testing Equipment Co Ltd
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-06-05
Anticipated expiration: 2029-09-23

Abstract

The utility model provides an electromagnetic wave receiver and pipeline no cable detector, the receiver includes by electromagnetic wave receiving circuit, electromagnetic wave receiving circuit's coil module is a consistent density solenoid, be used for receiving a frequency and be less than 25Hz sine wave signal and with sine wave signal coupling in amplifier circuit module, amplifier circuit module and filter module amplify sine wave signal in order and filter and with sine wave signal through an IO mouth input single chip module, single chip module handles sine wave signal, and control buzzer module and send buzzing when sine wave signal satisfies the settlement condition, because the frequency of electromagnetic wave receiving circuit receipt is low, the wavelength is long, have fine penetrating quality to the medium, can be to tracing the location under the no cable, long distance's condition, can increase the distance and the precision of detection, and the coil module has adopted consistent density solenoid, electromagnetic waves of extremely low frequencies can be received without excessively increasing the volume.

Description

Electromagnetic wave receiver and pipeline cableless detector

Technical Field

The utility model belongs to the technical field of the pipeline transportation technique and specifically relates to an electromagnetic wave receiver and pipeline are not cable to be detected ware is related to.

Background

With the development of pipeline transportation industry, the pipeline internal detector is widely applied to pipeline engineering. Tracing and positioning technology of the pipeline internal detector is a technology for determining the position of the pipeline internal detector in a pipeline, and becomes an important technology for determining the effective work of the pipeline internal detector. However, the conventional cable tracing and positioning method severely limits the working distance of the pipeline detector due to the influence of factors such as cable weight, signal loss and the like, and the application of the conventional electromagnetic wave technology in the tracing and positioning of the detector inside the pipeline is greatly limited due to the shielding effect of the pipeline and the medium where the pipeline is located. Therefore, how to realize the cableless "tracing positioning" of the pipeline internal detector is one of the important subjects to improve the working performance and the practical value of the pipeline detector.

The tracing and positioning technology of the pipeline detector comprises two meanings: tracing and positioning inside the pipeline and tracing and positioning outside the pipeline. The tracing and positioning in the pipeline are mainly used for the autonomous control of the detector, so that the autonomy is improved, the moving, the positioning and the operation of the detector in the pipeline can be automatically finished by a computer under the cooperation of a perfect sensing device without human intervention, and the control mode is 'intelligent' in the true sense. And the outer tracing and positioning of the pipeline are mainly used for an operator outside the pipeline to know the position of the mobile robot in the pipeline.

The tracing and positioning technology in the pipeline can be realized by the aid of various sensors, and for the tracing and positioning outside the pipeline, no other method is available except for adopting a cable mode. The working distance of the cabled robot is generally short due to attenuation and loss of electric signals, limitation of mechanical strength of cables and the like of the cabled robot along with increase of detection length of the cabled in-tube moving robot. Therefore, the untethered detector is a necessary trend for the development of long pipeline operation detectors.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an electromagnetic wave receiver and pipeline no cable detector to realize the inside and outside no cable spike location of pipeline, can increase the distance and the precision that detect.

Based on this, the utility model provides an electromagnetic wave receiver, including the electromagnetic wave receiving circuit, the electromagnetic wave receiving circuit includes coil module, amplifier circuit module, filtering module, single chip module and bee calling organ module, the coil module is a secret solenoid for it is less than 25 Hz's sinusoidal wave signal and will to receive a frequency sinusoidal wave signal coupling advances in the amplifier circuit module, the amplifier circuit module with the filtering module will in order sinusoidal wave signal enlargies and filters and will sinusoidal wave signal passes through an IO mouth input among the single chip module, single chip module is right sinusoidal wave signal handles, and control when sinusoidal wave signal satisfies the settlement condition bee calling organ module sends bee calling organ.

Optionally, the amplification factor of the amplification circuit module is between 15 times and 20 times.

Optionally, the single chip microcomputer module includes a single chip microcomputer chip of a model number STM32L431RCT6, and the amplifying circuit module includes an amplifying chip of a model number THS 4531.

Optionally, the single chip microcomputer module receives the sine wave signals from the filtering module through an analog-to-digital conversion pin, performs analog-to-digital conversion on the sine wave signals, responds one by one according to the response frequency of the sine wave signals, and controls the buzzer module to generate buzzes according to a threshold value.

Optionally, a triode switch is arranged between the single chip microcomputer module and the buzzer module, and the single chip microcomputer module outputs a level signal to control the on-off of the triode switch by comparing the amplitude of the sine wave signal with the threshold value, so as to control the on-off of the buzzer module.

Optionally, the filtering module is an infinite gain multi-path feedback active filtering module, and a center frequency of the filtering module is the same as a center frequency of the sine wave signal.

Optionally, the diameter of the dense solenoid is between 18mm-22mm, and the length of the dense solenoid is between 120mm-140 mm.

Optionally, the wire diameter of the coil of the dense solenoid is between 0.1mm and 0.2 mm.

Optionally, the material of the core of the dense solenoid is ferrite.

The utility model also provides a pipeline is not had cable detector sets up in a pipeline and/or outside the pipeline, reach as including a mobile robot electromagnetic wave receiver, electromagnetic wave receiver set up in mobile robot is last and along mobile robot removes.

The utility model provides an electromagnetic wave receiver and pipeline cableless detector, including electromagnetic wave receiving circuit, electromagnetic wave receiving circuit includes coil module, amplifier circuit module, filter module, singlechip module and bee calling organ module, the coil module is a dense solenoid for receiving a frequency and being less than 25Hz sine wave signal and with the sine wave signal coupling enter in amplifier circuit module, amplifier circuit module with the filter module in order with sine wave signal amplify and filter and with sine wave signal through an IO mouth input in the singlechip module, the singlechip module handles sine wave signal, and when sine wave signal satisfies the settlement condition control bee calling organ module sends buzzing, because the frequency of the electromagnetic wave that electromagnetic wave receiving circuit received is less than 25Hz, the electromagnetic wave wavelength of the extremely low frequency is very long, the detector has good penetrating performance on media such as metal, soil layers and water, the detector in the pipeline can be traced and positioned under the conditions of no cable and long distance, the detection distance and the detection precision can be increased, in addition, the coil module adopts a dense solenoid, the electromagnetic wave of the extremely low frequency can be received, and the volume cannot be excessively increased.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments or technical descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a block diagram of an electromagnetic wave receiving circuit according to an embodiment of the present invention;

fig. 2 is a circuit diagram of an amplifying circuit module in an electromagnetic wave receiving circuit according to an embodiment of the present invention;

fig. 3 is a circuit diagram of a low voltage comparison circuit according to an embodiment of the present invention;

reference numerals:

1-a coil module; 2-an amplifying circuit module; 3-a filtering module; 4-a single chip microcomputer module; 5-a buzzer module.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the embodiment of the utility model provides an electromagnetic wave receiver sets up on a mobile robot and can follow mobile robot removes, mobile robot can adopt any kind of robot that can carry the thing that has now, electromagnetic wave transmitter includes electromagnetic wave receiving circuit, electromagnetic wave receiving circuit includes coil module 1, amplifier circuit module 2, filter module 3, single chip module 4 and the buzzer module 5 that connects in order. The coil module 1 is used for receiving a sine wave signal with a frequency lower than 25Hz (for example, 23Hz), and due to the low frequency and long wavelength of the sine wave signal, if a common antenna is used, the size of the antenna is very large, so the coil module 1 is a dense solenoid with a diameter between 18mm and 22mm and a length between 120mm and 140 mm. Optionally, the wire diameter of the coil of the compact solenoid is between 0.1mm and 0.2mm, so that the sine wave signal can be received and coupled into the amplifying circuit module 2, and the volume of the coil module 1 is not large. Optionally, the compact solenoid has an iron core made of ferrite, so as to increase the magnetic field strength and thus the transmitting capacity of the coil module 1.

As shown in fig. 2, the amplifying circuit module 2 includes a differential amplifying chip of a type THS4531, and amplifies the weak sine wave signal. The magnification can be adjusted to be between 15 times and 20 times according to the simulation of the actual use scene.

As a preferred embodiment, the amplifying circuit module may further include a REF3012 chip, the chip is connected to the front end of the THS4531 chip, and the THS4531 chip performs voltage lifting on the front end sinusoidal wave signal to ensure that the subsequent ADC can acquire a complete signal; and then amplifying the sine wave signal by a THS4531 differential amplification chip.

The parameters of the amplifying circuit module 2 are as follows:

parameter(s)	Design index
		Magnification factor	15-20 times (Adjustable)
Output voltage	0-3.3V
		Temperature of the environment of use	-40 to 85 ℃ (Industrial)

The amplifying circuit module 2 is powered by a voltage of 3.3V, and is connected to the coil module 1 through a V _ IN + pin to receive the sine wave signal S1, and the amplified sine wave signal S2 can be input to the filtering module 3 through the V _ OUT + pin.

Optionally, the filtering module 3 is an infinite gain multi-path feedback active filtering module, and the center frequency of the filtering module is the same as the center frequency of the sine wave signal, so that interference of other signals, such as 50Hz alternating current interference, can be effectively filtered. The parameters of the filtering module 3 are shown in the following table:

parameter(s)	Design index
		Center frequency	23Hz
Bandwidth of	0.6Hz
		Quality factor
	40

Optionally, the filtering module 3 inputs the sine wave signal from an analog-to-digital conversion pin of the single chip microcomputer module 4, the single chip microcomputer module 4 performs analog-to-digital conversion on the sine wave signal, the single chip microcomputer module 4 includes a single chip microcomputer chip of which the model is STM32L431RCT6, the single chip microcomputer module 4 processes (fourier transform FFT) the sine wave signal, and determines whether a 23Hz low-frequency signal is responded according to the response frequency of the sine wave signal one by one, the parameters of the single chip microcomputer module 4 are shown in the following table, and the circuit structure is shown in fig. 3.

Parameter(s)	Design index
		Accuracy of Fourier transform	0.1Hz
Power consumption	≤10mA

In order to remind an operator that the detection is passed, the single-chip microcomputer module 4 controls the buzzer module 5 to buzz according to a threshold value, a triode switch is arranged between the single-chip microcomputer module 4 and the buzzer module 5, and the single-chip microcomputer module 4 controls the on-off of the triode switch by comparing the amplitude of the sine wave signal with the threshold value to output a level signal, so that the buzzer module 5 is controlled to be turned on and off.

The utility model also provides a pipeline is not had cable detector sets up in a pipeline and/or the pipeline is in order to detect outside the defect and the damage of pipeline can real-time detection and the damage condition such as deformation, the corruption of record pipeline, including a mobile robot and if electromagnetic wave receiver, electromagnetic wave receiver set up in mobile robot is last and along mobile robot removes.

Optionally, the pipeline is a gas pipeline, an oil pipeline, or a water pipeline, and the embodiment is not limited.

Based on this, the embodiment provides an electromagnetic wave receiver and a pipeline cableless detector, the detector at least comprises an electromagnetic wave receiving circuit, the electromagnetic wave receiving circuit comprises a coil module 1, an amplifying circuit module, a filtering module, a single chip microcomputer module and a buzzer module, the coil module 1 is a dense solenoid and is used for receiving a sine wave signal with a frequency lower than 25Hz and coupling the sine wave signal into the amplifying circuit module, the amplifying circuit module and the filtering module sequentially amplify and filter the sine wave signal and input the sine wave signal into the single chip microcomputer module through an IO port, the single chip microcomputer module processes the sine wave signal and controls the buzzer module to buzz when the sine wave signal meets a set condition, because the frequency of the electromagnetic wave received by the electromagnetic wave receiving circuit is lower than 25Hz, the electromagnetic wave wavelength of the extremely low frequency is very long, the detector has good penetrating performance to media such as metal, soil layers, water and the like, the detector inside the pipeline can be traced and positioned under the conditions of no cable and long distance, the detection distance and the detection precision can be increased, in addition, the coil module 1 adopts a dense solenoid, the electromagnetic wave of the extremely low frequency can be received, and the volume cannot be excessively increased.

Claims

1. An electromagnetic wave receiver, comprising: an electromagnetic wave receiving circuit;

the electromagnetic wave receiving circuit comprises a coil module, an amplifying circuit module, a filtering module, a single chip microcomputer module and a buzzer module, wherein the coil module is a dense solenoid and is used for receiving a sine wave signal with the frequency lower than 25Hz and coupling the sine wave signal into the amplifying circuit module, the amplifying circuit module is sequentially connected with the filtering module and is used for amplifying and filtering the sine wave signal and then inputting the sine wave signal into the single chip microcomputer module through an IO port, and the single chip microcomputer module processes the sine wave signal and controls the buzzer module to buzz when the sine wave signal meets set conditions.

2. The electromagnetic wave receiver according to claim 1, characterized in that: the amplification factor of the amplification circuit module is 15-20 times.

3. The electromagnetic wave receiver according to claim 1 or 2, characterized in that: the single chip microcomputer module comprises a single chip microcomputer chip with the model of STM32L431RCT6, and the amplifying circuit module comprises an amplifying chip with the model of THS 4531.

4. The electromagnetic wave receiver according to claim 3, characterized in that: the single chip microcomputer module receives sine wave signals from the filtering module through an analog-to-digital conversion pin, performs analog-to-digital conversion on the sine wave signals, responds one by one according to the response frequency of the sine wave signals, and controls the buzzer module to buzz according to a threshold value.

5. The electromagnetic wave receiver according to claim 4, characterized in that: and a triode switch is arranged between the singlechip module and the buzzer module, and the singlechip module outputs a level signal to control the on-off of the triode switch by comparing the amplitude of the sine wave signal with the threshold value, so as to control the on-off of the buzzer module.

6. The electromagnetic wave receiver according to claim 1, characterized in that: the filtering module is an infinite gain multi-path feedback active filtering module, and the center frequency of the filtering module is the same as that of the sine wave signal.

7. The electromagnetic wave receiver according to claim 1, characterized in that: the diameter of the dense solenoid is between 18mm-22mm, and the length of the dense solenoid is between 120mm-140 mm.

8. The electromagnetic wave receiver according to claim 7, characterized in that: the wire diameter of the coil of the compact solenoid is between 0.1mm and 0.2 mm.

9. The electromagnetic wave receiver according to claim 7, characterized in that: the iron core of the compact solenoid is made of ferrite.

10. A pipeline is there is not cable detector, sets up in a pipeline and/or outside the pipeline, its characterized in that: comprising a mobile robot and an electromagnetic wave receiver as claimed in any one of claims 1 to 9, said electromagnetic wave receiver being disposed on said mobile robot and moving with said mobile robot.