CN106124098A - The method of testing of small-resistant fastener longitudinal resistance and device - Google Patents

Abstract

The invention discloses a method and a device for testing the longitudinal resistance of a fastener with small resistance. The testing method includes: obtaining a pulse electric signal emitted by a longitudinal resistance tester; obtaining a target electric signal corresponding to the pulse electric signal, wherein the frequency of the target electric signal is the same as that of the pulse electric signal; and calculating a small resistance button according to the target electric signal The longitudinal resistance value of the piece. The present invention solves the problem of low efficiency in testing the longitudinal resistance of small-resistance fasteners in the related art.

Description

Method and device for testing longitudinal resistance of small resistance fasteners

technical field

The invention relates to the technical field of electronic applications, in particular to a method and device for testing the longitudinal resistance of a small-resistance fastener.

Background technique

At present, in the design of railway lines, in order to reduce the interaction force between the bridge structure and the seamless track on the bridge, small resistance fasteners are usually used, that is, relative longitudinal displacement between the rail and the foundation is allowed. Therefore, the longitudinal resistance value of small resistance fasteners is one of the important parameters in the design of railway lines. At the same time, in order to grasp the change of the longitudinal resistance value of the small-resistance fasteners during service and the difference between them and the design value, it is necessary to conduct field tests on the longitudinal resistance values of the small-resistance fasteners. However, the current on-site testing methods are relatively backward and cannot meet the existing needs. The on-site test of longitudinal resistance of small resistance fasteners mainly uses equipment such as jacks and displacement meters for testing. Jacks and displacement gauges are used for testing, and the technical means are relatively backward. During the testing process, it is necessary to saw off the rails, use jacks and special tooling to pull/push the rails, record the force and displacement, and then calculate the longitudinal resistance value of the fastener. At the same time, after the test is completed, the sawn rail needs to be welded. The test process is cumbersome, requires more personnel and equipment, and the test efficiency is low, because the test process needs to saw off the rails, which is also a destructive test and cannot meet the existing needs.

Aiming at the problem of low efficiency in testing the longitudinal resistance of small-resistance fasteners in the related art, no effective solution has been proposed so far.

Contents of the invention

The main purpose of the present invention is to provide a method and device for testing the longitudinal resistance of small-resistance fasteners, so as to solve the problem of low efficiency in testing the longitudinal resistance of small-resistance fasteners in the related art.

In order to achieve the above object, according to one aspect of the present invention, a method for testing the longitudinal resistance of a small resistance fastener is provided. The testing method includes: obtaining a pulse electric signal emitted by a longitudinal resistance tester; obtaining a target electric signal corresponding to the pulse electric signal, wherein the frequency of the target electric signal is the same as that of the pulse electric signal; and calculating a small resistance button according to the target electric signal The longitudinal resistance value of the piece.

Further, obtaining the target electrical signal corresponding to the pulse electrical signal includes: converting the pulse electrical signal to obtain a mechanical wave with the same frequency; performing reflection processing on the mechanical wave with the same frequency to obtain a mechanical echo; and performing conversion processing on the mechanical echo , to get the target electrical signal.

Further, calculating the longitudinal resistance value of the small-resistance fastener according to the target electrical signal includes: adding a time stamp to the target electrical signal to obtain the marked target electrical signal; and sending the marked target electrical signal to the terminal device, wherein the terminal The device is used to calculate the longitudinal resistance value of the fastener with small resistance according to the marked target electric signal.

Further, before acquiring the pulse electrical signal emitted by the longitudinal resistance tester, the test method further includes: sending a control command to the longitudinal resistance tester, wherein the control command is used to control the longitudinal resistance tester to emit the pulse electrical signal.

Further, after calculating the longitudinal resistance value of the small-resistance fastener according to the target electrical signal, the test method also includes: uploading the longitudinal resistance value of the small-resistance fastener to the cloud storage device; The longitudinal resistance value of the piece is analyzed and processed.

In order to achieve the above object, according to another aspect of the present invention, a device for testing the longitudinal resistance of a small resistance fastener is provided. The test device includes: a first acquisition unit, configured to acquire a pulse electrical signal emitted by a longitudinal resistance tester; a second acquisition unit, configured to acquire a target electrical signal corresponding to the pulse electrical signal, wherein the frequency of the target electrical signal is the same as The frequencies of the signals are the same; and a calculation unit is used for calculating the longitudinal resistance value of the small resistance fastener according to the target electric signal.

Further, the second acquisition unit includes: a first processing module, which is used to transform and process the pulse electric signal to obtain a mechanical wave with the same frequency; a second processing module, which is used to reflect the mechanical wave with the same frequency to obtain a mechanical echo wave; and a third processing module, configured to transform and process the mechanical echo to obtain the target electrical signal.

Further, the calculation unit includes: an acquisition module, configured to add a time stamp to the target electrical signal to obtain the marked target electrical signal; and a sending module, configured to send the marked target electrical signal to the terminal device, wherein the terminal The device is used to calculate the longitudinal resistance value of the fastener with small resistance according to the marked target electric signal.

Further, the testing device further includes: a sending unit, configured to send a control command to the longitudinal resistance tester, wherein the control command is used to control the longitudinal resistance tester to emit pulse electrical signals.

Further, the testing device also includes: a transmission unit, configured to upload the longitudinal resistance value of the small-resistance fastener to the cloud storage device; and a processing unit, configured to process the longitudinal resistance value of the small resistance fastener in the cloud storage device Analytical processing.

Through the present invention, the following steps are adopted: obtaining the pulse electric signal emitted by the longitudinal resistance tester; obtaining the target electric signal corresponding to the pulse electric signal, wherein the frequency of the target electric signal is the same as the frequency of the pulse electric signal; and calculating according to the target electric signal The longitudinal resistance value of the small-resistance fastener solves the problem of low efficiency in testing the longitudinal resistance of the small-resistance fastener in the related art. Since the longitudinal resistance value of the small-resistance fastener is directly calculated according to the target signal corresponding to the pulse electric signal emitted by the longitudinal resistance tester, it avoids the tedious mechanical work in the related technology to test the longitudinal resistance of the small-resistance fastener, thereby achieving an improvement. The effect of test efficiency on the longitudinal resistance of small resistance fasteners.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 is the flow chart of the test method of the longitudinal resistance of the small resistance fastener according to the embodiment of the present invention;

2 is a schematic diagram of a test system for the longitudinal resistance of a small resistance fastener according to an embodiment of the present invention;

3 is a schematic diagram of the structure of the ultrasonic transceiver device in the test system for the longitudinal resistance of the small resistance fastener according to an embodiment of the present invention; and

Fig. 4 is a schematic diagram of a test device for longitudinal resistance of a small resistance fastener according to an embodiment of the present invention.

detailed description

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

It should be noted that the terms "first" and "second" in the specification and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific order or sequence. It should be understood that the data so used may be interchanged under appropriate circumstances for the embodiments of the application described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

According to an embodiment of the present invention, a method for testing the longitudinal resistance of a small-resistance fastener is provided.

Fig. 1 is a flowchart of a method for testing the longitudinal resistance of a fastener with low resistance according to an embodiment of the present invention. As shown in Figure 1, the test method includes the following steps:

Step S101, acquiring pulse electrical signals emitted by the longitudinal resistance tester.

The longitudinal resistance tester transmits a pulse electrical signal according to a control command of a handheld terminal (for example, a mobile phone) or a computer terminal, and obtains the pulse electrical signal emitted by the longitudinal resistance tester. There are many ways to obtain the pulse electrical signal emitted by the longitudinal resistance tester. For example, a pulse collector is used to collect the pulse electrical signal emitted by the longitudinal resistance tester according to the control instructions of the handheld terminal (eg, mobile phone) or computer terminal.

Step S102, acquiring a target electrical signal corresponding to the pulse electrical signal, wherein the frequency of the target electrical signal is the same as the frequency of the pulse electrical signal.

In order to obtain the longitudinal resistance value of small-resistance fasteners, in this step, the pulse electrical signal emitted by the obtained longitudinal resistance tester is converted into a mechanical wave of the same frequency, and the mechanical wave is reflected to form a mechanical echo, and then the mechanical echo is transformed into For the electrical signal and transmit the electrical signal back to the longitudinal resistance tester. The longitudinal resistance tester then time-marks the received electrical signal, and takes the time-marked electrical signal as the target electrical signal. That is, the target electrical signal corresponding to the pulse electrical signal is obtained.

Step S103, calculating the longitudinal resistance value of the small resistance fastener according to the target electric signal.

The target electrical signal obtained in the above steps is transmitted to a handheld terminal (for example, a mobile phone) or a computer terminal through a wireless communication device such as Bluetooth or a satellite network, and through a pre-set processing program of the handheld terminal (for example, a mobile phone) or a computer terminal, Calculate the current stress of the rail, and at the same time obtain the internal force of the rail at the current position, and then calculate the longitudinal resistance value of the small-resistance fastener according to the obtained current stress of the rail.

It should be noted that the handheld terminal involved in the embodiment of the present invention is not limited to a mobile phone, but may also be other handheld terminals such as a pad, which is not limited in the present invention.

The method for testing the longitudinal resistance of small-resistance fasteners provided by the embodiments of the present invention is to acquire the pulse electrical signal emitted by the longitudinal resistance tester; to acquire the target electrical signal corresponding to the pulse electrical signal, wherein the frequency of the target electrical signal is the same as the frequency of the pulse electrical signal The frequency is the same; and the longitudinal resistance value of the fastener with small resistance is calculated according to the target electrical signal, which solves the problem of low efficiency in testing the longitudinal resistance of the fastener with small resistance in the related art. Since the longitudinal resistance value of the small-resistance fastener is directly calculated according to the target signal corresponding to the pulse electric signal emitted by the longitudinal resistance tester, it avoids the tedious mechanical work in the related technology to test the longitudinal resistance of the small-resistance fastener, thereby achieving an improvement. The effect of test efficiency on the longitudinal resistance of small resistance fasteners.

Optionally, in the method for testing the longitudinal resistance of a small-resistance fastener provided in an embodiment of the present invention, obtaining the target electrical signal corresponding to the pulse electrical signal includes: converting the pulse electrical signal to obtain a mechanical wave with the same frequency; The mechanical wave is reflected and processed to obtain a mechanical echo; and the mechanical echo is transformed to obtain a target electrical signal.

Optionally, in the method for testing the longitudinal resistance of a small-resistance fastener provided in an embodiment of the present invention, calculating the longitudinal resistance value of the small-resistance fastener according to the target electrical signal includes: adding a time stamp to the target electrical signal to obtain the marked target an electrical signal; and sending the marked target electrical signal to the terminal device, wherein the terminal device is used to calculate the longitudinal resistance value of the small resistance fastener according to the marked target electrical signal.

Optionally, in the method for testing the longitudinal resistance of a small-resistance fastener provided in an embodiment of the present invention, before acquiring the pulse electrical signal emitted by the longitudinal resistance tester, the test method further includes: sending a control command to the longitudinal resistance tester, Wherein, the control instruction is used to control the longitudinal resistance tester to emit pulse electric signals.

Optionally, in the method for testing the longitudinal resistance of the small-resistance fastener provided in the embodiment of the present invention, after calculating the longitudinal resistance value of the small-resistance fastener according to the target electrical signal, the test method further includes: The longitudinal resistance value is uploaded to the cloud storage device; and the longitudinal resistance value of the small resistance fastener in the cloud storage device is analyzed and processed.

Specifically, the method for testing the longitudinal resistance of small-resistance fasteners provided in the embodiment of the present invention is implemented through a small-resistance fastener longitudinal resistance testing system, wherein the small-resistance fastener longitudinal resistance testing system is shown in Figure 2, and the ultrasonic transceiver device A schematic diagram of the structure is shown in Figure 3. Specifically, the small-resistance fastener longitudinal resistance test system includes a longitudinal resistance tester (1), an ultrasonic transceiver (2), a temperature compensation device (3), a handheld terminal (for example, a mobile phone) or a computer terminal (4) and cloud storage equipment (5) etc. During the test, the small-resistance fastener longitudinal resistance testing system performs wireless remote control on the longitudinal resistance tester (1) through a handheld terminal (mobile phone) or computer terminal (4), and the longitudinal resistance tester (1) is controlled according to the handheld terminal (for example, Mobile phone) or computer terminal (4) command (6) to transmit pulse electric signal (7), ultrasonic transceiver device (2) converts pulse electric signal into mechanical wave (201) of the same frequency through piezoelectric ceramic device (21), mechanical wave The mechanical echoes (202) and (203) are formed through reflection, and the piezoelectric ceramic device (22) converts the mechanical echoes into electrical signals and transmits the electrical signals (8) back to the longitudinal resistance tester (1). Longitudinal resistance tester (1) time-marks the received electrical signal, takes the time-marked electrical signal as the target electrical signal, and transmits the target electrical signal to the handheld terminal (mobile phone) or The computer terminal (4), through the post-processing program of the handheld terminal (mobile phone) or the computer terminal (4), can accurately obtain the current stress of the rail, and at the same time obtain the internal force of the rail at the current position, and then according to the obtained current stress of the rail, Calculate the longitudinal resistance value of the small resistance fastener. The handheld terminal (mobile phone) or computer terminal (4) can upload the measured longitudinal resistance to the cloud storage device (5), and can access and download the historical data in the cloud storage device (5) at any time to master the longitudinal resistance of small resistance fasteners value changes.

When the rail is in a free state or at locked rail temperature, there is no stress inside the rail; however, when the rail is on the line and the rail temperature is not locked, stress will be generated inside the rail. Due to the internal stress of the rail, the propagation time of the ultrasonic wave will change. According to formula (1), the current rail stress can be calculated.

Among them, σ—rail stress; E—rail elastic modulus; l—acoustoelastic coefficient; c—temperature compensation coefficient; T—ultrasonic propagation time when there is stress inside the rail; T ₀ —ultrasonic propagation time when there is no stress inside the rail .

According to the above-mentioned principle, the present invention will accurately measure the ultrasonic propagation time of the rail in the state of stress or not, calculate the rail stress in the current state by formula (1), and multiply it by the cross-sectional area A of the rail to obtain the longitudinal force of the rail. At intervals of n fastener nodes, the rail stresses are measured as σ ₁ and σ ₂ respectively, then the longitudinal resistance f provided by each small resistance fastener can be obtained by formula (2):

In summary, the test system that the test method for the longitudinal resistance of small-resistance fasteners provided by the embodiment of the present invention relies on includes: a longitudinal resistance tester (1), an ultrasonic transceiver (2), a temperature compensation device (3), a hand-held terminal (for example, mobile phone) or computer terminal (4) and cloud storage device (5) etc. The longitudinal resistance tester (1) is a device for transmitting and receiving pulse electrical signals, measuring and calculating the time difference between the transmitting and echoing electrical signals. When the rail is in a free state or at locked rail temperature, the time difference between transmitting and receiving electrical signals is T0, and when the rail has internal stress, the time difference between transmitting and receiving electrical signals is T, then according to formula (1), it can be obtained Rail stresses in the current state. The rail stress at different positions is measured, and the longitudinal resistance provided by each small resistance fastener can be obtained according to formula (2). Among them, the handheld terminal (for example, mobile phone) or computer terminal (4) can realize the following functions: (1) set different pulse electric signal frequencies, pulse times, etc.; (2) set the elastic modulus of different materials, temperature compensation parameters, Stress compensation parameters, etc.; (3) Set management parameters such as multi-channel real-time measurement; (4) Access cloud storage device (5) to upload and download data at any time; (5) Provide cloud storage device (5) and cloud computing and other big data analysis function.

Through the present invention, the longitudinal resistance of small-resistance fasteners can be detected on the line at any time, which greatly improves the existing detection means and detection efficiency, and can monitor the longitudinal resistance of small-resistance fasteners in real time during the use of small-resistance fasteners. Provide reference for the optimal design of small resistance fasteners.

It should be noted that the steps shown in the flowcharts of the accompanying drawings may be performed in a computer system, such as a set of computer-executable instructions, and that although a logical order is shown in the flowcharts, in some cases, The steps shown or described may be performed in an order different than here.

The embodiment of the present invention also provides a test device for the longitudinal resistance of small resistance fasteners. It should be noted that the test device for the longitudinal resistance of small resistance fasteners in the embodiment of the present invention can be used to implement Test method for longitudinal resistance of small resistance fasteners. The test device for the longitudinal resistance of the small-resistance fastener provided by the embodiment of the present invention is introduced below.

Fig. 4 is a schematic diagram of a test device for longitudinal resistance of a small resistance fastener according to an embodiment of the present invention. As shown in FIG. 4 , the test device includes: a first acquisition unit 10 , a second acquisition unit 20 and a calculation unit 30 .

Wherein, the first acquisition unit 10 is used to acquire the pulse electric signal emitted by the longitudinal resistance tester.

The longitudinal resistance tester transmits a pulse electrical signal according to a control command of a handheld terminal (for example, a mobile phone) or a computer terminal, and obtains the pulse electrical signal emitted by the longitudinal resistance tester. There are many ways to obtain the pulse electrical signal emitted by the longitudinal resistance tester. For example, a pulse collector is used to collect the pulse electrical signal emitted by the longitudinal resistance tester according to the control instructions of the handheld terminal (eg, mobile phone) or computer terminal.

The second acquisition unit 20 is configured to acquire a target electrical signal corresponding to the pulse electrical signal, wherein the frequency of the target electrical signal is the same as that of the pulse electrical signal.

In order to obtain the longitudinal resistance value subsequently, in this step, the pulse electrical signal acquired by the first acquisition unit 10 and emitted by the longitudinal resistance tester is converted into a mechanical wave of the same frequency, and the mechanical wave is reflected to form a mechanical echo, and then the mechanical echo is transformed into For the electrical signal and transmit the electrical signal back to the longitudinal resistance tester. The longitudinal resistance tester time-marks the received electric signal, and takes the time-marked electric signal as the target electric signal. That is, the target electrical signal corresponding to the pulse electrical signal is obtained.

The calculation unit 30 is used for calculating the longitudinal resistance value of the small resistance fastener according to the target electric signal.

The target electrical signal obtained by the second acquisition unit 20 is transmitted to a handheld terminal (for example, a mobile phone) or a computer terminal through a wireless communication device such as Bluetooth or a satellite network, and is pre-set by a handheld terminal (for example, a mobile phone) or a computer terminal. The processing program calculates the current stress of the rail, and at the same time obtains the internal force of the rail at the current position, and then calculates the longitudinal resistance value of the small-resistance fastener according to the obtained current stress of the rail.

It should be noted that the handheld terminal involved in the embodiment of the present invention is not limited to a mobile phone, but may also be other handheld terminals such as a pad, which is not limited in the present invention.

The device for testing the longitudinal resistance of small-resistance fasteners provided in the embodiment of the present invention uses the first acquisition unit 10 to acquire the pulse electrical signal emitted by the longitudinal resistance tester; the second acquisition unit 20 acquires the target electrical signal corresponding to the pulse electrical signal, wherein, The frequency of the target electrical signal is the same as the frequency of the pulse electrical signal; the calculation unit 30 calculates the longitudinal resistance value of the small-resistance fastener according to the target electrical signal, which solves the problem of low efficiency in the longitudinal resistance test of the small-resistance fastener in the related art. According to the target signal corresponding to the pulse electric signal emitted by the longitudinal resistance tester, the longitudinal resistance value of the small resistance fastener is calculated, which avoids the tedious mechanical work in the related technology to test the longitudinal resistance of the small resistance fastener, and then achieves the improvement of the small resistance fastener. The effect of resistance on longitudinal resistance of fasteners is tested.

Optionally, in the device for testing the longitudinal resistance of small-resistance fasteners provided in the embodiment of the present invention, the second acquisition unit 20 includes: a first processing module, configured to convert the pulse electrical signal to obtain a mechanical wave of the same frequency; The second processing module is used for reflecting the mechanical wave with the same frequency to obtain the mechanical echo; and the third processing module is used for converting the mechanical echo to obtain the target electrical signal.

Optionally, in the test device for the longitudinal resistance of a small-resistance fastener provided in an embodiment of the present invention, the calculation unit 30 includes: an acquisition module, configured to add a time stamp to the target electrical signal to obtain the marked target electrical signal; and send The module is used to send the marked target electric signal to the terminal device, wherein the terminal device is used to calculate the longitudinal resistance value of the small resistance fastener according to the marked target electric signal.

Optionally, in the device for testing the longitudinal resistance of a small-resistance fastener provided in an embodiment of the present invention, the test device further includes: a sending unit, configured to send a control instruction to the longitudinal resistance tester, wherein the control instruction is used to control the longitudinal resistance of the fastener. The resistance tester emits pulsed electrical signals.

Optionally, in the test device for the longitudinal resistance of the small resistance fastener provided in the embodiment of the present invention, the test device further includes: a transmission unit, configured to upload the longitudinal resistance value of the small resistance fastener to the cloud storage device; and processing The unit is used for analyzing and processing the longitudinal resistance value of the small resistance fastener in the cloud storage device.

Through the present invention, the longitudinal resistance of small-resistance fasteners can be detected on the line at any time, which greatly improves the existing detection means and detection efficiency, and can monitor the longitudinal resistance of small-resistance fasteners in real time during the use of small-resistance fasteners. Provide reference for the optimal design of small resistance fasteners.

It should be noted that for the foregoing method embodiments, for the sake of simple description, they are expressed as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence. Because of the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the foregoing embodiments, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or can be Integrate into another system, or some features may be ignored, or not implemented.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

Obviously, those skilled in the art should understand that each module or each step of the above-mentioned present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network formed by multiple computing devices Optionally, they can be implemented with program codes executable by a computing device, so that they can be stored in a storage device and executed by a computing device, or they can be made into individual integrated circuit modules, or they can be integrated into Multiple modules or steps are fabricated into a single integrated circuit module to realize. As such, the present invention is not limited to any specific combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. the method for testing of a small-resistant fastener longitudinal resistance, it is characterised in that including:

Obtain the pulse electrical signal that longitudinal resistance tester is launched；

Obtain the target signal of telecommunication that described pulse electrical signal is corresponding, wherein, the frequency of the described target signal of telecommunication and described pulse electricity The frequency of signal is identical；And

The longitudinal resistance value of small-resistant fastener is calculated according to the described target signal of telecommunication.

Method the most according to claim 1, it is characterised in that obtain the target signal of telecommunication bag that described pulse electrical signal is corresponding Include:

Described pulse electrical signal is carried out conversion process, obtains the mechanical wave of same frequency；

The mechanical wave of described same frequency is carried out reflection process, obtains mechanical echoes；And

Described mechanical echoes is carried out conversion process, obtains the described target signal of telecommunication.

Method the most according to claim 1, it is characterised in that calculate the vertical of small-resistant fastener according to the described target signal of telecommunication Include to Resistance Value:

The described target signal of telecommunication is added time labelling, obtains the target signal of telecommunication after labelling；And

Sending the target signal of telecommunication after described labelling to terminal unit, wherein, described terminal unit is for according to described labelling After the target signal of telecommunication calculate small-resistant fastener longitudinal resistance value.

Method the most according to claim 1, it is characterised in that obtaining the pulse electrical signal that longitudinal resistance tester is launched Before, described method also includes:

Sending control instruction to described longitudinal resistance tester, wherein, described control instruction is used for controlling longitudinal resistance tester Launch described pulse electrical signal.

Method the most according to claim 1, it is characterised in that calculating small-resistant fastener according to the described target signal of telecommunication After longitudinal resistance value, described method also includes:

The longitudinal resistance value of described small-resistant fastener is uploaded to cloud storage equipment；And

It is analyzed processing to the longitudinal resistance value of the described small-resistant fastener in described cloud storage equipment.

6. the test device of a small-resistant fastener longitudinal resistance, it is characterised in that including:

First acquiring unit, for obtaining the pulse electrical signal that longitudinal resistance tester is launched；

Second acquisition unit, for obtaining the target signal of telecommunication that described pulse electrical signal is corresponding, wherein, the described target signal of telecommunication Frequency is identical with the frequency of described pulse electrical signal；And

Computing unit, for calculating the longitudinal resistance value of small-resistant fastener according to the described target signal of telecommunication.

Device the most according to claim 6, it is characterised in that described second acquisition unit includes:

First processing module, for described pulse electrical signal is carried out conversion process, obtains the mechanical wave of same frequency；

Second processing module, for the mechanical wave of described same frequency is carried out reflection process, obtains mechanical echoes；And

3rd processing module, for described mechanical echoes is carried out conversion process, obtains the described target signal of telecommunication.

Device the most according to claim 6, it is characterised in that described computing unit includes:

Acquisition module, for the described target signal of telecommunication is added time labelling, obtains the target signal of telecommunication after labelling；And

Sending module, for sending the target signal of telecommunication after described labelling to terminal unit, wherein, described terminal unit is used for The longitudinal resistance value of small-resistant fastener is calculated according to the target signal of telecommunication after described labelling.

Device the most according to claim 6, it is characterised in that described device also includes:

Transmitting element, for sending control instruction to described longitudinal resistance tester, wherein, described control instruction is used for controlling to indulge Described pulse electrical signal is launched to resistance measurement instrument.

Device the most according to claim 6, it is characterised in that described device also includes:

Delivery unit, for being uploaded to cloud storage equipment by the longitudinal resistance value of described small-resistant fastener；And

Processing unit, for being analyzed processing to the longitudinal resistance value of the described small-resistant fastener in described cloud storage equipment.