CN106596719A - Method, device and system for detecting pressure welding quality - Google Patents

Abstract

The invention discloses a method, device and system for detecting crimping quality. Wherein, the method includes: transmitting ultrasonic waves to predetermined positions of the crimping type fittings to be detected; obtaining reflection spectra of ultrasonic waves at predetermined positions, wherein the reflection spectra are used to record the reflection waveforms of ultrasonic waves; comparing the reflection spectra with corresponding preset standards The reflection spectra are compared to obtain the comparison results; according to the comparison results, it is determined whether the crimping quality of the crimping type fittings is qualified. The invention solves the technical problem in the related art that the non-destructive crimping quality detection cannot be performed on the running crimping type fittings.

Description

Method, device and system for detecting crimping quality

technical field

The invention relates to the field of quality inspection, in particular to a method, device and system for inspecting crimping quality.

Background technique

Line accidents such as dropped lines on overhead transmission lines in operation seriously endanger the safe operation of the power grid, and even cause unpredictable power grid and personal accidents, resulting in very bad social impacts. It is of great significance to carry out wire crimping quality inspection.

At present, in power transmission line engineering, the crimping quality inspection method for crimping type fittings is to perform appearance dimension inspection and grip test after crimping. Among them, the appearance dimension inspection cannot detect the crimping state inside the fittings, and cannot intuitively judge the crimping of fittings. Pick up quality. The grip test is a destructive testing method carried out in the laboratory. It is a spot check test, which cannot represent the crimping state of the fittings in the actual operation of the line, and will also cause loss of fittings and wires.

The above detection methods cannot perform non-destructive inspection and random inspection of the internal crimping state of the fittings after the construction site is crimped, let alone crimping quality inspection of the crimping type fittings after hanging wires in the air. Therefore cannot fundamentally get rid of the hidden danger of the major accident that this kind of crimping quality unqualified causes.

In view of the problem in the above-mentioned related technologies that the crimping type fittings in operation cannot be non-destructively inspected for crimping quality, no effective solution has been proposed yet.

Contents of the invention

Embodiments of the present invention provide a method, device and system for detecting crimping quality, so as to at least solve the technical problem in the related art that non-destructive crimping quality detection cannot be performed on running crimping type fittings.

According to an aspect of an embodiment of the present invention, a method for detecting crimping quality is provided, including: transmitting ultrasonic waves to predetermined positions of the crimping type fittings to be detected; It is used to record the reflection waveform of the ultrasonic wave; compare the reflection spectrum with the corresponding preset standard reflection spectrum to obtain the comparison result; determine whether the crimping quality of the crimping type fitting is qualified according to the comparison result.

Further, obtaining the reflection spectrum of the ultrasonic wave at the predetermined position includes: obtaining the total reflection spectrum of the ultrasonic wave at the predetermined position if there is an air gap at the predetermined position; obtaining the ultrasonic wave at the predetermined position if there is no air gap at the predetermined position partial reflectance spectrum.

Further, comparing the reflection spectrum with the corresponding preset standard reflection spectrum includes: comparing the total reflection spectrum with the preset unqualified standard reflection spectrum under the condition that the total reflection spectrum of the ultrasonic wave at the predetermined position is obtained Yes; when the partial reflection spectrum of the ultrasonic wave at the predetermined location is obtained, the partial reflection spectrum is compared with the preset qualified standard reflection spectrum.

Further, according to the comparison result, it is determined whether the crimping quality of the crimping type fittings is qualified, including: if the comparison result shows that the total reflection spectrum is consistent with the preset unqualified standard reflection spectrum, it is determined that the crimping quality of the crimping type fittings is not good. Qualified; if the comparison result shows that the partial reflection spectrum is consistent with the preset qualified standard reflection spectrum, it is determined that the crimping quality of the crimping type fitting is qualified.

Further, determining that the crimping quality of the crimping-type fittings is qualified includes: continuing to emit ultrasonic waves to at least two detection surfaces of the crimping-type fittings within a predetermined length range, and obtaining ultrasonic reflection spectra of at least two detection surfaces; comparing The reflection spectrum is compared with the preset standard reflection spectrum to obtain a comparison result; if the comparison results are consistent, it is determined that the crimping quality of the crimping type fitting is qualified.

Further, determining that the crimping quality of the crimping-type fittings is unqualified includes: continuing to emit ultrasonic waves to at least two detection surfaces of the crimping-type fittings within a predetermined length range, and obtaining ultrasonic reflection spectra of at least two detection surfaces; A comparison result is obtained by comparing the reflection spectrum with the preset unqualified standard reflection spectrum; if the comparison results are consistent, it is determined that the crimping quality of the crimping type fitting is unqualified.

Further, after determining that the crimping quality of the crimping type fittings is unqualified, it includes: if it is detected that the reflection spectrum is consistent with the preset standard reflection spectrum, recording the position where the reflection spectrum changes; according to the position where the reflection spectrum changes, determine Crimp depth of crimp fittings.

Further, before transmitting the ultrasonic wave to the predetermined position of the crimping type fitting to be detected, it also includes: adjusting the gain of the total reflection waveform in the reflection spectrum to a preset value.

According to another aspect of the embodiment of the present invention, there is also provided a device for testing crimping quality, including: a transmitting module, used to transmit ultrasonic waves to a predetermined position of a crimped fitting to be tested; an acquisition module, used to obtain a predetermined The reflection spectrum of the ultrasound at the part, wherein the reflection spectrum is used to record the reflection waveform of the ultrasound; the comparison module is used to compare the reflection spectrum with the corresponding preset standard reflection spectrum to obtain the comparison result; the determination module is used to According to the comparison results, determine whether the crimping quality of the crimping type fittings is qualified.

Further, the acquisition module includes: a first acquisition submodule, used to acquire the total reflection spectrum of the ultrasonic waves at the predetermined location when there is an air gap at the predetermined location; In the case of , a partial reflection spectrum of ultrasonic waves at a predetermined location is obtained.

Further, the comparison module includes: a first comparison sub-module, which is used to compare the total reflection spectrum with the preset unqualified standard reflection spectrum under the condition that the total reflection spectrum of the ultrasonic wave at the predetermined position is obtained; The second comparison sub-module is used to compare the partial reflection spectrum with the preset qualified standard reflection spectrum when the partial reflection spectrum of the ultrasonic wave at the predetermined position is obtained.

Further, the first determination module includes: a first determination sub-module, which is used to determine that the crimping quality of the crimping type fitting is unqualified if the comparison result shows that the total reflection spectrum is consistent with the preset unqualified standard reflection spectrum; The second determination sub-module is used to determine that the crimping quality of the crimping type fittings is qualified if the comparison result shows that the partial reflection spectrum is consistent with the preset standard reflection spectrum.

Further, the first determination sub-module includes: a first transmitting unit, configured to continue transmitting ultrasonic waves to at least two detection surfaces of crimp-type fittings within a predetermined length range, and obtain ultrasonic reflection spectra of at least two detection surfaces; The first comparison unit is used to compare the reflection spectrum with the preset standard reflection spectrum to obtain the comparison result; the first determination unit is used to determine that the crimping quality of the crimping type fitting is qualified if the comparison results are consistent.

Further, the second determination sub-module includes: a first transmitting unit, configured to continue to transmit ultrasonic waves to at least two detection surfaces of the crimping type fitting within a predetermined length range, and obtain ultrasonic reflection spectra of at least two detection surfaces; The first comparison unit is used to compare the reflectance spectrum with the preset unqualified standard reflection spectrum to obtain the comparison result; the first determination unit is used to determine whether the crimping quality of the crimping type fittings is not good if the comparison results are consistent. qualified.

Further, the above-mentioned device also includes: a recording module, used to record the position where the reflection map changes if it is detected that the reflection map is consistent with the preset qualified standard reflection map; the second determination module is used to , to determine the crimping depth of the crimping type fittings.

Further, the above device further includes: an adjustment module, configured to adjust the gain of the total reflection waveform in the reflection spectrum to a preset value.

According to another aspect of the embodiments of the present invention, there is also provided a system for detecting crimping quality, including: at least one crimping type fitting; at least one ultrasonic detector, used to detect the crimping quality of at least one crimping type fitting Eligibility.

Further, the ultrasonic detector includes: a probe head, connected to the ultrasonic detector, for sending ultrasonic waves to a predetermined area of the crimping type fitting; a processor, located in the ultrasonic detector, for receiving and processing the reflected waves of the ultrasonic waves; The display screen is connected with the processor and is used for displaying the reflection spectrum of the ultrasonic wave.

In the embodiment of the present invention, the method of ultrasonic detection is adopted, by transmitting ultrasonic waves to predetermined positions of the crimping type fittings to be detected; obtaining the reflection spectrum of the ultrasonic waves at the predetermined position, wherein the reflection spectrum is used to record the reflection waveform of the ultrasonic waves; The reflectance spectrum is compared with the corresponding preset standard reflection spectrum to obtain the comparison result; according to the comparison result, it is determined whether the crimping quality of the crimping type fittings to be tested is qualified, and the crimping quality of the crimping type fittings is detected. The purpose of this method is to achieve the technical effect of improving the accuracy of quality inspection of crimping type fittings, and further solve the technical problem in the related art that the crimping type fittings in operation cannot be non-destructively inspected for crimping quality.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is a flow chart of a method for detecting crimping quality according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of an optional crimping fitting for ultrasonic detection according to an embodiment of the present invention;

Figure 3(a) is a schematic diagram of another optional ultrasonic detection direction according to an embodiment of the present invention;

Fig. 3 (b) is another optional crimping cross-sectional schematic diagram according to an embodiment of the present invention;

Fig. 4 is a schematic diagram of a device for detecting crimping quality according to an embodiment of the present invention; and

Fig. 5 is a schematic diagram of an optional device for detecting crimping quality according to an embodiment of the present invention.

detailed description

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

It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or 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.

Example 1

According to an embodiment of the present invention, an embodiment of a method for detecting crimping quality is provided. It should be noted that the steps shown in the flow chart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and , although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

Fig. 1 is a flow chart of a method for detecting crimping quality according to an embodiment of the present invention. As shown in Fig. 1, the method includes the following steps:

Step S102, sending ultrasonic waves to predetermined positions of the crimping type fittings to be tested.

Specifically, in the above step S102, the ultrasonic wave can be a kind of ultrasonic wave for flaw detection, and the ultrasonic wave for flaw detection is a high-frequency pulse elastic wave with a frequency as high as hundreds of kilohertz to several megahertz, which can penetrate radio waves and cannot pass through light waves. At the same time, it can reflect on the interface of two materials with different characteristic impedances. When there is inhomogeneity inside the object, the attenuation of the ultrasonic wave will change, so that the defects inside the object can be distinguished.

As a non-destructive testing technology, ultrasonic testing not only has the advantages of strong penetrating ability, simple equipment, good safety, and wide detection range, but also has the advantage of being able to conduct online testing, and ultrasonic waves are harmless to the human body.

Specifically, the above-mentioned crimping type fittings may be fittings for crimping aluminum tubes and wires, for example, strain clamps and the like.

It should be noted that step S102 of the above-mentioned method can be implemented on an ultrasonic detector. The crimping quality inspection of the strain clamp is used as an example to illustrate the following. The group test is completed by two testers. One person holds the ultrasonic detector and stands at the hanging point of the tension cross-arm insulator, and the other person holds the probe head and goes to the tension clamp to scan. The instrument and the probe head pass through a 10-meter-long The data line is connected to obtain the signal, and the depth of the wire inserted into the tension clamp is analyzed according to the measured result. Fig. 2 is a schematic diagram of an optional ultrasonic detection crimping fitting according to an embodiment of the present invention. The detection position of the crimping depth of the strain-resistant clamp wire is shown in Fig. 2, wherein a is: ultrasonic wave, b is: wire, c is: air, d is: aluminum tube. Among them, 1#, 2#, 3#, 3 meet the requirements of the construction drawings (the depth of the end of the wire inserted into the strain clamp is designed to be 270mm), and 4#, 5#, 6#, 3 do not meet the requirements of the construction drawings (<270mm), the number and crimping depth are shown in Table 1:

Table 1

Using the ultrasonic detector to emit ultrasonic waves can realize continuous detection of the crimping quality of the 1#-6# strain-resistant clamp tubes in the above table.

It can be seen from the analysis that the above scheme utilizes the characteristic that ultrasonic waves cannot propagate in the air. By transmitting ultrasonic waves into the crimping type fittings to be detected, it is possible to detect whether there is an air gap in the crimping type fittings according to the amplitude of the reflected wave, that is, the crimping type fittings. Whether the connection quality is qualified or not, there is no need for destructive inspection and random inspection, which reduces the difficulty and intensity of crimping inspection work.

Step S104, acquiring a reflection spectrum of the ultrasonic wave at a predetermined location, wherein the reflection spectrum is used to record the reflection waveform of the ultrasound wave.

Specifically, in the above step S104, due to the supervision blind spot in the production of the crimping fittings, the insertion depth of the wire inside the crimping fittings may be insufficient. There is an air gap, because the ultrasonic wave cannot propagate in the air, the reflected waveform of the ultrasonic wave in the air is obviously different from the reflected wave wave of the ultrasonic wave transmitted in the metal, after the ultrasonic wave is transmitted into the crimping type fitting to be tested, the image of the predetermined position can be obtained A reflection spectrum of an ultrasonic wave, wherein the above-mentioned reflection spectrum can be used to record any reflection waveform of an ultrasonic wave.

In an optional embodiment, when the ultrasonic wave encounters the "aluminum tube-wire" compacted interface, it will be partially transmitted and partially reflected, and the reflected energy will be reduced. When the ultrasonic wave encounters the "aluminum-air" interface, it will produce total reflection. , the reflection waveform of any ultrasonic wave can be recorded on the ultrasonic reflection spectrum. By obtaining the reflection spectrum of the detection part of the crimping type fittings, it can be judged whether there is an air gap in the specific detection part of the crimping type fittings. Phenomenon.

It can be seen from the analysis that the above step S104 utilizes the characteristic that ultrasonic waves can reflect on the interface of two materials with different characteristic impedances, and judges that the crimping type fitting is a compacted interface by obtaining the reflection spectrum of ultrasonic waves at a predetermined position (for example, "aluminum tube- Wire" interface), or the interface of insufficient wire insertion (for example, "aluminum-air" interface), realizes the non-destructive inspection and random inspection of the internal crimping state of the fitting after the crimping is completed, as well as the crimping during operation Type fittings for crimping quality inspection.

Step S106, comparing the reflection spectrum with the corresponding preset standard reflection spectrum to obtain a comparison result.

Specifically, in the above step S106, before performing crimping quality inspection, a standard reflection map model can be preset. According to different actual conditions, there may be two different situations: qualified and unqualified. Therefore, the preset standard reflection map model It is also possible to preset the qualified standard reflection spectrum and the unqualified standard reflection spectrum accordingly.

Since ultrasonic waves cannot propagate in the air and can be reflected on the interface between two materials with different characteristic impedances, the corresponding preset standard reflection spectra can also be different in different detection situations. For example, if the ultrasonic wave detects that the crimping quality is qualified (for example, the ultrasonic wave encounters the "aluminum tube-wire" compaction interface), it will be partially transmitted and partially reflected, and the reflected energy will be reduced. In this qualified case, the corresponding preset standard reflection The spectrum can be partially transmitted, partially reflected, and the reflected wave is weak. When the ultrasonic wave detects that the crimping quality is unqualified (for example, the ultrasonic wave encounters the "aluminum-air" interface), it will produce total reflection, and the reflected wave intensity. In this unqualified case, the corresponding preset standard reflection spectrum can be full Reflect and the reflected wave is strong.

The following still takes the crimping quality inspection of the strain clamp as an example. In order to obtain the test results and give accurate conclusions, it is necessary to pre-set the corresponding standard reflection spectrum before the verification test. After the test results are obtained, compare the test results with the preset The corresponding standard reflectance spectra were compared.

It should be noted that due to the different materials of the tested crimping type fittings, the reflection waveform of the ultrasonic wave will also change accordingly. Therefore, the above-mentioned preset standard reflection spectrum should also be adjusted according to the material of the test object. , the staff can adaptively adjust the corresponding preset standard reflection spectrum according to the actual situation.

What still needs to be explained here is that if other different situations occur in the actual quality inspection work, those skilled in the art can think of adding the corresponding preset standard reflectance spectrum according to the specific situation, so as to improve the accuracy of the comparison result.

In step S108, it is determined whether the crimping quality of the crimping type fitting is qualified according to the comparison result.

Specifically, in the above step S108, it can be judged that the crimping type fitting is a compacted interface (for example, an "aluminum tube-wire" interface) by judging whether the reflection spectrum in the comparison result is consistent with the corresponding preset standard reflection spectrum. , or the insufficient wire insertion interface (for example, "aluminum-air" interface), it is further possible to determine whether the crimping quality of the crimping type fittings is qualified.

In the above optional embodiment of the crimping quality inspection of the strain clamp, the following conclusions can be drawn through the reflection of the reflection spectrum displayed in the interface of the ultrasonic detector display:

(1) Test situation of 1#-3# wire (wire crimping depth: design value 270mm): From the end of the 1# tension wire clamp tube to the non-pressing area, the ultrasonic spectrum is consistent with the standard reflection spectrum that is qualified in the diagram, and can be It is judged that the wire crimping depth meets the requirements.

(2) Test conditions of 4#-6# wire (wire crimping depth: 4#-6#: 100mm, 150mm, 200mm): the ultrasonic spectrum detected on the wire side is consistent with the qualified standard reflection spectrum; the ultrasonic wave detected on the air side There are three elongated sharp waves in the spectrum, which are consistent with the unqualified standard reflection spectrum, indicating that there is an air gap in the tube, and it can be judged that the crimping depth of the wire does not meet the requirements.

It should be noted that during the crimping quality process of crimping type fittings, the reflection of ultrasonic waves may be affected by other cut-offs such as air, so there may be errors in the test results, but the errors can be reduced by reducing environmental interference factors, gaining emission waveforms, etc. Make adjustments.

In the technical solution provided in the above step S102 to step S108, the method of ultrasonic detection is adopted, by transmitting ultrasonic waves to the predetermined parts of the crimping type fittings to be detected; obtaining the reflection spectrum of the ultrasonic waves at the predetermined position, wherein the reflection spectrum is used for Record the reflection waveform of the ultrasonic wave; compare the reflection spectrum with the corresponding preset standard reflection spectrum to obtain the comparison result; determine whether the crimping quality of the crimping type fittings is qualified according to the comparison results, and achieve the purpose of testing the crimping type fittings. The purpose of whether the quality of the joint is qualified, thereby achieving the technical effect of improving the accuracy of the quality inspection of the crimping type fittings, and then solving the technical problem that the non-destructive crimping quality inspection of the crimping type fittings in operation cannot be performed in the related technology .

Based on the technical solutions provided by the foregoing embodiments, the present invention also provides the following preferred solutions:

Optionally, in step S104, obtaining the reflection spectrum of the ultrasonic wave at the predetermined location includes the following steps:

Step S202, if there is an air gap at the predetermined position, acquire a total reflection spectrum of the ultrasonic wave at the predetermined position.

Step S204, if there is no air gap at the predetermined location, acquire a partial reflection spectrum of the ultrasonic wave at the predetermined location.

Since ultrasonic waves cannot propagate in the air, and can be reflected at the interface of two substances with different characteristic impedances, for example, ultrasonic waves can detect that the crimping quality is qualified (for example, ultrasonic waves meet the "aluminum tube-wire" compaction interface) will partially Transmission, partial reflection, and reduced reflection energy. In this qualified case, obtain the partial reflection spectrum of the ultrasonic wave at the predetermined location. When the ultrasonic wave detects that the crimping quality is unqualified (for example, the ultrasonic wave encounters the "aluminum-air" interface), it will produce total reflection, and the reflected wave intensity, in this unqualified case, obtain the total reflection spectrum of the ultrasonic wave at the predetermined position.

It can be seen from the analysis that in the above steps S202 to S204, by obtaining different reflection spectra of the crimping type fittings under different circumstances, it can be judged whether the crimping quality of the crimping type fittings is qualified. It realizes the non-destructive inspection and sampling inspection of the internal crimping state of the fittings after the crimping is completed, and the crimping quality inspection of the crimping type fittings during operation.

In an optional embodiment, performing step S106, that is, comparing the reflection spectrum with the corresponding preset standard reflection spectrum, includes the following steps:

Step S302, when the total reflection spectrum of the ultrasonic wave at the predetermined location is obtained, compare the total reflection spectrum with the preset unqualified standard reflection spectrum.

Step S304, when the partial reflectance spectrum of the ultrasonic wave at the predetermined location is obtained, compare the partial reflectance spectrum with the preset qualified standard reflection spectrum.

Specifically, in the above-mentioned steps S302 to S304, after obtaining the ultrasonic reflection spectrum of the predetermined part, if the total reflection spectrum of the ultrasonic wave of the predetermined part is obtained, the total reflection spectrum can be compared with the preset unqualified standard In the case that the partial reflection spectrum of the ultrasonic wave at the predetermined position is obtained, the partial reflection spectrum can be compared with the preset qualified standard reflection spectrum to judge the ultrasonic frequency of the detection part of the crimping type fitting. Whether the reflection spectrum is consistent with the corresponding preset standard reflection spectrum, and then judge whether the ultrasonic reflection spectrum of the detection part of the crimping type fitting meets the standard.

In an optional embodiment, the crimping quality of the tension clamp is still tested, and the reflection spectrum in the display interface of the ultrasonic detector is compared with the corresponding preset standard reflection spectrum, and the following conclusions can be drawn : 1#-3# wire: The ultrasonic detector obtains part of the reflection spectrum, compares the ultrasonic spectrum with the preset qualified standard reflection spectrum, and can judge whether the crimping depth of the wire meets the quality requirements. 4#-6# wire: The ultrasonic detector obtains the total reflection spectrum, and three elongated sharp waves appear in the ultrasonic spectrum detected on the air side, indicating that there is an air gap in the tube, so the ultrasonic spectrum is compared with the preset unqualified standard reflection spectrum By comparison, it can be judged whether the crimping depth of the wire meets the requirements of unqualified quality.

Optionally, in performing step S108, determining whether the crimping quality of the crimping type fitting is qualified according to the comparison result includes the following steps:

Step S402, if the comparison result shows that the total reflection spectrum is consistent with the preset unqualified standard reflection spectrum, it is determined that the crimping quality of the crimping type fitting is unqualified.

Step S404, if the comparison result shows that the partial reflection spectrum is consistent with the preset standard reflection spectrum, it is determined that the crimping quality of the crimping type fitting is qualified.

Specifically, in the above step S402 to step S404, the comparison results are further confirmed. If the comparison result is that the total reflection spectrum is consistent with the preset unqualified standard reflection spectrum, it means that there is an air gap inside the tension clamp. Insufficient wire insertion, crimping quality inspection failed. If the comparison result shows that the partial reflection spectrum is consistent with the preset qualified standard reflection spectrum, it means that the insertion depth of the internal wire of the tension clamp is sufficient, and the crimping quality inspection is qualified.

Still taking the crimping quality inspection of the strain clamp in the above optional implementation example as an example, the test situation of the 1#-3# wire is: the ultrasonic spectrum is consistent with the qualified standard reflection spectrum, and the crimping depth of the wire can be judged meet the requirements. The test conditions of 4#-6# wires are as follows: the ultrasonic spectrum detected on the wire side is consistent with the qualified standard reflection spectrum; the ultrasonic spectrum detected on the air side has three elongated sharp waves, which is consistent with the unqualified standard reflection spectrum, indicating that there is Air gap, it can be judged that the wire crimping depth does not meet the requirements.

Optionally, FIG. 3 is a schematic diagram of another optional ultrasonic testing crimping fitting according to an embodiment of the present invention. As shown in FIG. 3 , in step S404, it is determined that the crimping quality of the crimping type fitting is qualified, including Follow the steps below:

Step S502, continue to transmit ultrasonic waves to at least two testing surfaces of the crimping type fitting to be tested within a predetermined length range, and obtain ultrasonic reflection spectra of at least two testing surfaces.

Step S504, comparing the reflectance atlas with the preset standard reflectance atlas to obtain a comparison result.

Step S506, if the comparison results are consistent, it is determined that the crimping quality of the crimping type fitting is qualified.

In the above step S502 to step S504, if it is determined that the crimping quality of the crimping type fitting is qualified, it may be further detected whether the analysis result is basically consistent with the actual situation.

In the above optional embodiment, as shown in Figure 3(a) and Figure 3(b), a is: ultrasonic wave, b is: wire, c is: air, d is: aluminum tube, e is the test direction, f is the crimp cross section. The results of continuous ultrasonic detection of 1#-6# wire crimping tubes show that the detection analysis results are basically consistent with the actual situation, and the qualification confirmation standard can be as follows: Figure 3(a) shows the direction of detection, which can be never crimped area Continuously scan 100mm to the nozzle, and Figure 3(b) shows the crimping cross-section of the test. In the crimping cross-section, two or more sides are selected for detection. If the ultrasonic detection spectrum is consistent with the preset standard reflection spectrum, is qualified.

In the above step S502 to step S504, the method of detecting three sides of the same position of the wire crimping tube is adopted. In the case of confirming the qualified crimping quality, the ultrasonic detection can be continued within the predetermined length range, and the detection result can be compared with the qualified standard. Comparing the reflectance maps can further improve the accuracy of detection and judgment.

Optionally, in step S402, determining that the crimping quality of the crimping type fitting is unqualified includes the following steps:

Step S602, continue to emit ultrasonic waves to at least two detection surfaces of the crimping type fitting to be detected within a predetermined length range, and obtain ultrasonic reflection spectra of at least two detection surfaces;

Step S604, comparing the reflection spectrum with the preset unqualified standard reflection spectrum to obtain the comparison result;

Step S606, if the comparison results are consistent, it is determined that the crimping quality of the crimping type fitting is unqualified.

Specifically, in the above step S502 to step S504, if it is determined that the crimping quality of the crimping type fitting is unqualified, it may be further detected whether the analysis result is basically consistent with the actual situation.

In an optional embodiment, taking the tension clamp as an example, as shown in Figure 3(a) and Figure 3(b), a is: ultrasonic wave, b is: wire, c is: air, d is : aluminum tube, e is the test direction, f is the crimping cross section. The unqualified confirmation criteria can be: Figure 3(a) shows the direction of detection, continuous scanning from the non-pressing area to the nozzle, Figure 3(b) shows the crimping cross-section of the test, in the crimping cross-section Optionally detect on two or more sides. If the ultrasonic detection spectrum is consistent with the preset unqualified standard reflection spectrum, it is judged that there is an air gap in the tension clamp tube, the wire of the tension clamp is inserted insufficiently, and the crimping quality is unqualified. .

In the above step S602 to step S604, the method of detecting three sides of the same position of the wire crimping tube is adopted. In the case of confirming the unqualified crimping quality, the ultrasonic detection can be continued within the predetermined length range, and the detection result is compared with the unqualified one. Comparing the standard reflection spectrum of the standard reflection spectrum can further improve the accuracy of crimping quality detection and judgment of crimping fittings.

Optionally, after step S402 is performed, that is, after it is determined that the crimping quality of the crimping type fitting is unqualified, the following steps are included:

Step S702, if it is detected that the reflectance pattern is consistent with the preset qualified standard reflectance pattern, record the position where the reflectance pattern changes.

Step S704, determining the crimping depth of the crimping type fitting according to the position where the reflection spectrum changes.

In the above steps S702 to S704, ultrasonic waves can be used to detect the crimping depth of the wires, and by comparing the ultrasonic spectra of the strain clamps and the compacted parts of the wires, it is possible to make a measurement on the parts where there is an air gap inside the strain clamps. judge.

In an optional embodiment, after confirming that the crimping quality of the crimping type fittings is unqualified, it should continue to scan to the nozzle, and confirm the pressure of the wire in the tube by comparing the different wave spectra formed by the ultrasonic wave passing through the wire and the air. Crimping depth until the wire tip position is found, then measure and record the wire crimp depth.

Still taking the above-mentioned strain clamp as an example, the crimping depth of the 4# wire (wire crimping depth: 100mm), the test situation: the ultrasonic spectrum detected on the wire side is consistent with the preset standard reflection spectrum; the ultrasonic spectrum detected on the air side Three elongated sharp waves appeared, which were consistent with the preset unqualified standard reflection spectrum, indicating that there was an air gap in the tube. By transmitting ultrasonic waves to continuously search and comparing the ultrasonic spectrum, it was determined that the position of the wire crimping joint was at 115mm.

Optionally, before performing step S102, that is, before transmitting ultrasonic waves to predetermined positions of the crimping type fittings to be detected, the following steps are included:

Step S802, adjusting the gain of the total reflection waveform in the reflection spectrum to a preset value.

Specifically, in the above step S802, in order to obtain a test pattern that is easy to observe and give an accurate conclusion, the reflection pattern can be set according to the actual situation before the verification test.

In an optional embodiment, the ultrasonic probe can be used to test the part where there is air under the known tension line clamp, and the corresponding reflection waveform can be obtained. At this time, the gain of the oscilloscope can be adjusted to make the peak of the secondary wave About 80% of the screen height.

Through the solution of the above step S802, the conclusion of the insertion depth of the wire can be given more accurately, and the judgment can be prevented from being interfered by the small air gap at the crimping part of the wire.

Example 2

According to another aspect of the embodiments of the present invention, an embodiment of a device for detecting crimping quality is also provided. 4 is a schematic diagram of a device for detecting crimping quality according to an embodiment of the present invention. As shown in FIG.

Wherein, the transmitting module 10 is used to transmit ultrasonic waves to a predetermined position of the crimping type fitting to be detected; the acquisition module 20 is used to obtain the reflection spectrum of the ultrasound wave at the predetermined position, wherein the reflection spectrum is used to record the reflection waveform of the ultrasound wave; The matching module 30 is used to compare the reflection spectrum with the corresponding preset standard reflection spectrum to obtain the comparison result; the determination module 40 is used to determine whether the crimping quality of the crimping type fitting is qualified according to the comparison result.

It should be noted here that the above-mentioned transmission module 10, acquisition module 20, comparison module 30, and determination module 40 correspond to steps S102 to S108 in Embodiment 1, and the examples and application scenarios realized by the above-mentioned modules and corresponding steps The same, but not limited to the content disclosed in the first embodiment above. It should be noted that, as a part of the apparatus, the above-mentioned modules can be executed in a computer system such as a set of computer-executable instructions.

In the technical solution provided by the above device, ultrasonic detection is adopted, and the transmitting module is used to transmit ultrasonic waves to predetermined positions of the crimping type fittings to be detected; the acquisition module is used to obtain the reflection spectrum of ultrasonic waves at predetermined positions, wherein, The reflection spectrum is used to record the reflection waveform of the ultrasonic wave; the comparison module is used to compare the reflection spectrum with the corresponding preset standard reflection spectrum to obtain the comparison result; the determination module is used to determine the crimping type fitting according to the comparison result Whether the crimping quality of the crimping fittings is qualified or not achieves the purpose of detecting whether the crimping quality of the crimping fittings is qualified, thereby achieving the technical effect of improving the accuracy of the quality inspection of the crimping fittings, and then solving the problems that cannot be checked in the operation in the related technology Technical problems of non-destructive crimping quality inspection for crimping type fittings.

Based on the technical solutions provided by the foregoing embodiments, the present invention also provides the following preferred solutions:

Optionally, FIG. 5 is a schematic diagram of a device for detecting crimping quality according to an embodiment of the present invention. As shown in FIG. 5 , in an optional implementation, the acquisition module 20 includes: a first acquisition sub-module 22 , the second acquisition sub-module 24 .

Among them, the first acquisition sub-module 22 is used to acquire the total reflection spectrum of the ultrasonic wave at the predetermined position when there is an air gap in the predetermined position; , to obtain the partial reflection spectrum of the ultrasonic wave at the predetermined location.

It should be noted here that the above-mentioned first acquisition sub-module 22 and second acquisition sub-module 24 correspond to steps S202 to S204 in the first embodiment, and the examples and application scenarios implemented by the above-mentioned modules and corresponding steps are the same, but It is not limited to the content disclosed in the first embodiment above. It should be noted that, as a part of the apparatus, the above-mentioned modules can be executed in a computer system such as a set of computer-executable instructions.

Optionally, in an optional embodiment, the comparison module 30 includes: a first comparison submodule 32 and a second comparison submodule 34 .

Wherein, the first comparison submodule 32 is used to compare the total reflection spectrum with the preset unqualified standard reflection spectrum when the total reflection spectrum of the ultrasonic wave at the predetermined position is obtained; the second comparison submodule 34. It is used for comparing the partial reflection spectrum with the preset qualified standard reflection spectrum when the partial reflection spectrum of the ultrasonic wave at the predetermined position is obtained.

It should be noted here that the first comparison sub-module 32 and the second comparison sub-module 34 correspond to steps S302 to S304 in the first embodiment, and the examples and application scenarios implemented by the above-mentioned modules are the same as those of the corresponding steps , but not limited to the content disclosed in Embodiment 1 above. It should be noted that, as a part of the apparatus, the above-mentioned modules can be executed in a computer system such as a set of computer-executable instructions.

Optionally, in an optional embodiment, the first determining module 40 includes: a first determining submodule 42 and a second determining submodule 44 .

Among them, the first determination sub-module 42 is used to determine that the crimping quality of the crimping type fittings is unqualified if the comparison result is that the total reflection spectrum is consistent with the preset unqualified standard reflection spectrum; the second determination sub-module 44 is used to If the comparison result shows that the partial reflection spectrum is consistent with the preset standard reflection spectrum, it is determined that the crimping quality of the crimping type fitting is qualified.

It should be noted here that the above-mentioned first determination sub-module 42 and second determination sub-module 44 correspond to steps S402 to S404 in the first embodiment, and the examples and application scenarios implemented by the above-mentioned modules and corresponding steps are the same, but It is not limited to the content disclosed in the first embodiment above. It should be noted that, as a part of the apparatus, the above-mentioned modules can be executed in a computer system such as a set of computer-executable instructions.

Optionally, in an optional embodiment, the first determining submodule 42 includes: a first transmitting unit 423 , a first comparing unit 425 , and a first determining unit 427 .

Among them, the first transmitting unit 423 is used to continue to transmit ultrasonic waves to at least two detection surfaces of the crimping type fitting to be detected within a predetermined length range, so as to obtain reflection spectra of ultrasonic waves on at least two detection surfaces; the first comparison unit 425, for comparing the reflectance spectrum with a preset standard reflection spectrum to obtain a comparison result; the first determination unit 427, for determining that the crimping quality of the crimping type fitting is qualified if the comparison results are consistent.

It should be noted here that the first transmitting unit 423, the first comparing unit 425, and the first determining unit 427 correspond to steps S502 to S506 in Embodiment 1, and the examples and The application scenarios are the same, but are not limited to the content disclosed in the first embodiment above. It should be noted that, as a part of the apparatus, the above-mentioned modules can be executed in a computer system such as a set of computer-executable instructions.

Optionally, in an optional embodiment, the second determining submodule 44 includes: a second transmitting unit 443 , a second comparing unit 445 , and a second determining unit 447 .

Wherein, the second transmitting unit 443 is used to continue to transmit ultrasonic waves to at least two detection surfaces of the crimping type fitting to be detected within a predetermined length range, so as to obtain reflection spectra of ultrasonic waves on at least two detection surfaces; the second comparison unit 445, for comparing the reflectance spectrum with the preset unqualified standard reflection spectrum, to obtain the comparison result; the second determining unit 447, for determining that the crimping quality of the crimping type fitting is unqualified if the comparison results are consistent.

It should be noted here that the above-mentioned second transmitting unit 443, second comparing unit 445, and second determining unit 447 correspond to steps S602 to S606 in Embodiment 1, and the examples and The application scenarios are the same, but are not limited to the content disclosed in the first embodiment above. It should be noted that, as a part of the apparatus, the above-mentioned modules can be executed in a computer system such as a set of computer-executable instructions.

Optionally, in an optional embodiment, the above device further includes: a recording module 50 and a second determining module 60 .

Among them, the recording module 50 is used to record the position where the reflection map changes if it detects that the reflection map is consistent with the preset qualified standard reflection map; the second determining module 60 is used to determine the crimping position according to the position where the reflection map changes. The crimping depth of type fittings.

It should be noted here that the recording module 50 and the second determination module 60 correspond to steps S702 to S706 in the first embodiment, and the examples and application scenarios implemented by the above modules and the corresponding steps are the same, but are not limited to the above implementation The content disclosed in Example 1. It should be noted that, as a part of the apparatus, the above-mentioned modules can be executed in a computer system such as a set of computer-executable instructions.

Optionally, the above device further includes: an adjustment module 70, wherein the adjustment module 70 is configured to adjust the gain of the reflection waveform in the reflection map to a preset value.

It should be noted here that the above-mentioned adjustment module 70 corresponds to step S802 in the first embodiment, and the examples and application scenarios implemented by the above-mentioned modules and corresponding steps are the same, but are not limited to the content disclosed in the first embodiment above. It should be noted that, as a part of the apparatus, the above-mentioned modules can be executed in a computer system such as a set of computer-executable instructions.

Example 3

According to another aspect of the embodiments of the present invention, a system embodiment for detecting crimping quality is also provided. In an optional embodiment, the system includes: at least one crimping type fitting 80 and at least one ultrasonic detector 90.

Among them, at least one crimping type fitting 80; at least one ultrasonic detector 90 is used to detect whether the crimping quality of at least one crimping type fitting is qualified.

In the above system, the above-mentioned crimping type fittings may be fittings for crimping aluminum tubes and wires, for example, strain clamps and the like.

Specifically, the ultrasonic detector can be an ultrasonic detector for flaw detection, which can emit ultrasonic waves for flaw detection, wherein the ultrasonic wave for flaw detection is a high-frequency pulse elastic wave with a frequency as high as several hundred kilohertz to several megahertz, which can penetrate radio waves 1. Objects that light waves cannot pass through can be reflected at the interface of two materials with different characteristic impedances. When there is inhomogeneity inside the object, the ultrasonic attenuation will change, so that the defects inside the object can be distinguished.

Ultrasonic detectors can provide a non-destructive testing technology. In addition to the advantages of strong penetrating ability, simple equipment, good safety, and wide detection range, it also has the advantage of online detection, and ultrasonic waves are harmless to the human body.

The following takes the crimping quality inspection of the strain clamp as an example to illustrate. The staff selected 6 aluminum alloy conductor crimping tubes for testing, including 1#, 2#, and 3#, and 3 met the requirements of the construction drawings (conductors The depth of the end inserted into the strain clamp is designed to be 270mm), there are 4#, 5#, 6#, and 3 do not meet the requirements of the construction drawings (<270mm), the number and crimping depth are shown in Table 1:

Table 1

serial number 1# 2# 3# 4# 5# 6# Crimp depth 270mm 270mm 270mm 100mm 150mm 200mm

Using the ultrasonic detector to emit ultrasonic waves can realize continuous detection of the crimping quality of the 1#-6# strain-resistant clamp tubes in the above table.

It can be seen from the analysis that the above-mentioned system utilizes the characteristic that ultrasonic waves cannot propagate in the air, and transmits ultrasonic waves into the crimping type fittings to be detected through the ultrasonic detector, and can detect whether there is an air gap in the crimping type fittings according to the amplitude of the reflected wave , that is, whether the crimping quality is qualified, without destructive inspection and random inspection, which reduces the difficulty and intensity of crimping inspection work.

In the technical solution provided by the above system, ultrasonic detection is used to pass through at least one crimping type fitting; at least one ultrasonic detector is used to detect whether the crimping quality of at least one crimping type fitting is qualified, and the detection pressure is reached. Whether the quality of the crimping type fittings is qualified or not, thus achieving the technical effect of improving the accuracy of the quality inspection of the crimping type fittings, and further solving the problem that the non-destructive crimping quality of the crimping type fittings in operation cannot be solved in the related technology Detection of technical problems.

Based on the technical solutions provided by the foregoing embodiments, the present invention also provides the following preferred solutions:

Optionally, the ultrasonic detector 90 includes: a probe head 901 , a processor 903 , and a display screen 905 .

Among them, the probe head 901 is connected with the ultrasonic detector, and is used to send ultrasonic waves to the predetermined area of the crimping type fitting; the processor 903 is located in the ultrasonic detector, and is used to receive and process the reflected waves of the ultrasonic waves; the display screen 905, It is connected with the processor and used to display the reflection spectrum of the ultrasonic wave.

Specifically, as a part of the ultrasonic detector, the probe head can be connected with the ultrasonic detector, for example, wireless signal connection, data line connection, etc., the processor can be any kind of processor, and can be deployed inside the ultrasonic detector, It is used to receive and process the reflected wave of the ultrasonic wave, and the display screen is connected with the processor, which can be used to display the reflected wave of the ultrasonic wave.

In the above scheme, when the reflected wave returns from the defect or boundary of the crimping type metal fitting, the processor in the ultrasonic detector can receive and process the reflected wave of the ultrasonic wave, and the display screen of the ultrasonic detector is connected to the processor. The reflection spectrum of the ultrasonic waves processed can be displayed on the display screen.

Still taking the crimping quality inspection of the above-mentioned strain clamp as an example, each group of tests can be completed by two testers. One person holds an ultrasonic detector and stands at the hanging point of the tension cross-arm insulator, and the other person holds the probe head. Go to the tension clamp for scanning. As an optional solution, the ultrasonic detector and the probe head are connected to obtain signals through a data cable several meters long. The test results are displayed on the display screen, and the staff can read them at any time. The measured results analyze the depth of the wire inserted into the tension clamp. The detection direction and test surface of the crimping depth of the tension clamp wire are shown in Figure 3(a) and Figure 3(b), where a is: ultrasonic wave, b is: wire, c is: air, d is: aluminum Tube, e is the test direction, and f is the crimp cross section.

In order to confirm the effectiveness of ultrasonic testing, the tensile fittings and wires can be removed, and X-ray digital imaging technology is used in the laboratory to verify the depth of wire insertion into the strain tube. The test results of X-ray digital imaging technology are consistent with the ultrasonic The test results are basically the same.

It should be noted here that the connection between the ultrasonic detector and the probe head can be any way to obtain signals, which is not limited here.

Optionally, in order to obtain a test pattern that is easy to observe and give an accurate conclusion, an ultrasonic detector can be set according to the actual situation before the verification test. In an optional embodiment, the ultrasonic probe can be used to test the part where there is air under the known tension line clamp, and the corresponding reflection waveform can be obtained. At this time, the gain of the oscilloscope can be adjusted to make the peak of the secondary wave About 80% of the screen height. The conclusion of the insertion depth of the wire can be given more accurately, and the small air gap at the wire crimping part can be prevented from interfering with the judgment.

A system for detecting crimping quality provided by the invention has the following technical effects: no damage to wires and fittings, the ultrasonic detection device is portable, low in price, and easy to use, and the operation and maintenance personnel can carry out detection work after training, which is suitable for large-scale App promotion.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

In the above-mentioned embodiments of the present invention, 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 technical content can be realized in other ways. Wherein, the device embodiments described above are only illustrative. For example, the division of units can be a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into Another system, or some feature may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of units or modules may be in electrical or other forms.

A unit described as a separate component may or may not be physically separated, and a component shown as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed over multiple 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.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, server or network device, etc.) execute all or part of the steps of the methods in various embodiments of the present invention. The aforementioned storage media include: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes. .

The above are only preferred embodiments of the present invention, and it should be pointed out that for those of ordinary skill in the art, some improvements and modifications can also be made without departing from the principle of the present invention, and these improvements and modifications should also be considered Be the protection scope of the present invention.

Claims (11)

1. A method for detecting crimping quality, characterized in that, comprising: Transmit ultrasonic waves to the predetermined position of the crimping type fitting to be tested; Obtaining the reflection spectrum of the ultrasonic wave at the predetermined location, wherein the reflection spectrum is used to record the reflection waveform of the ultrasonic wave; Comparing the reflection spectrum with the corresponding preset standard reflection spectrum to obtain a comparison result; According to the comparison result, it is determined whether the crimping quality of the crimping type fitting is qualified. 2. The method according to claim 1, wherein obtaining the reflection spectrum of the ultrasound at the predetermined position comprises: In the case that there is an air gap in the predetermined position, acquiring a total reflection spectrum of the ultrasonic wave at the predetermined position; In the case that there is no air gap at the predetermined position, acquiring a partial reflection spectrum of the ultrasonic wave at the predetermined position. 3. The method according to claim 1, wherein comparing the reflectance spectrum with a corresponding preset standard reflection spectrum comprises: In the case that the total reflection spectrum of the ultrasonic wave at the predetermined position is obtained, comparing the total reflection spectrum with a preset unqualified standard reflection spectrum; When the partial reflectance spectrum of the ultrasonic wave at the predetermined location is acquired, the partial reflectance spectrum is compared with a preset qualified standard reflectance spectrum. 4. The method according to claim 1, wherein determining whether the crimping quality of the crimping type fitting is qualified according to the comparison result comprises: If the comparison result is that the total reflection spectrum is consistent with the preset unqualified standard reflection spectrum, it is determined that the crimping quality of the crimping type fitting is unqualified; If the comparison result is that the partial reflection spectrum is consistent with the preset standard reflection spectrum, it is determined that the crimping quality of the crimping type fitting is qualified. 5. The method according to claim 4, wherein determining that the crimping quality of the crimping type fittings is qualified comprises: Continue to emit ultrasonic waves to at least two detection surfaces of the crimping type fitting within a predetermined length range, and obtain ultrasonic reflection spectra of the at least two detection surfaces; Comparing the reflectance spectrum with the preset qualified standard reflection spectrum to obtain a comparison result; If the comparison results are consistent, it is determined that the crimping quality of the crimping type fitting is qualified. 6. The method according to claim 4, wherein determining that the crimping quality of the crimping type fitting is unqualified comprises: Continue to emit ultrasonic waves to at least two detection surfaces of the crimping type fitting within a predetermined length range, and obtain ultrasonic reflection spectra of the at least two detection surfaces; comparing the reflection spectrum with the preset unqualified standard reflection spectrum to obtain a comparison result; If the comparison results are consistent, it is determined that the crimping quality of the crimping type fitting is unqualified. 7. The method according to claim 6, characterized in that, after determining that the crimping quality of the crimping type fitting is unqualified, comprising: If it is detected that the reflection spectrum is consistent with the preset qualified standard reflection spectrum, record the position where the reflection spectrum changes; The crimping depth of the crimping fitting is determined according to the position where the reflection spectrum changes. 8. The method according to any one of claims 1 to 6, characterized in that before transmitting the ultrasonic wave to the predetermined position of the crimping type fitting to be detected, it also includes: Adjust the gain of the total reflection waveform in the reflection spectrum to a preset value. 9. A device for detecting crimping quality, comprising: The transmitting module is used to transmit the ultrasonic wave to the predetermined position of the crimping type fitting to be tested; An acquisition module, configured to acquire a reflection spectrum of the ultrasound at the predetermined location, wherein the reflection spectrum is used to record the reflection waveform of the ultrasound; A comparison module, configured to compare the reflection spectrum with the corresponding preset standard reflection spectrum to obtain a comparison result A determining module, configured to determine whether the crimping quality of the crimping type fitting is qualified according to the comparison result. 10. A system for detecting crimping quality, characterized in that it comprises: At least one crimp-type fitting; At least one ultrasonic detector is used to detect whether the crimping quality of at least one crimping type fitting is qualified. 11. The system of claim 10, wherein the ultrasonic detector comprises: a probe head, connected to the ultrasonic detector, for sending the ultrasonic wave to a predetermined area of the crimping type fitting; a processor, located in the ultrasonic detector, for receiving and processing the reflected waves of the ultrasonic waves; The display screen is connected with the processor and is used to display the reflection spectrum of the ultrasonic wave.