阅读说明：本技术 一种磁致伸缩液位计波导丝的长度与损伤检测一体化装置 (Length and damage detection integrated device for waveguide wire of magnetostrictive liquid level meter ) 是由 田中山 杨昌群 牛道东 李育特 王现中 唐志峰 陈会明 于 2021-09-01 设计创作，主要内容包括：本发明公开了一种磁致伸缩液位计波导丝的长度与损伤检测一体化装置。装置中波导丝长度测量模块设置在装置底板的中间,波导丝卷轮和磁致伸缩传感器分别固定安装在装置底板的两侧,波导丝长度测量模块通过波导丝导向组件与磁致伸缩传感器相连,启停模块设置在波导丝长度测量模块上并与波导丝长度测量模块电连接,控制模块分别与启停模块和磁致伸缩传感器相连,波导丝卷轮中卷绕有波导丝,波导丝依次经波导丝长度测量模块和波导丝导向组件后被截取后安装在磁致伸缩传感器中。本发明提高了波导丝的长度检测效率,同时实现波导丝长度的自动化无损检测,并提高长度检测精度,有效提高了波导丝长度检测和损伤检测的效率,具有一定的工程意义。(The invention discloses a length and damage detection integrated device for a waveguide wire of a magnetostrictive liquid level meter. The device is characterized in that a waveguide wire length measuring module is arranged in the middle of a device bottom plate, a waveguide wire winding wheel and a magnetostrictive sensor are fixedly arranged on two sides of the device bottom plate respectively, the waveguide wire length measuring module is connected with the magnetostrictive sensor through a waveguide wire guide assembly, a start-stop module is arranged on the waveguide wire length measuring module and is electrically connected with the waveguide wire length measuring module, a control module is connected with the start-stop module and the magnetostrictive sensor respectively, a waveguide wire is wound in the waveguide wire winding wheel, and the waveguide wire is installed in the magnetostrictive sensor after being intercepted after sequentially passing through the waveguide wire length measuring module and the waveguide wire guide assembly. The invention improves the length detection efficiency of the waveguide wire, realizes the automatic nondestructive detection of the length of the waveguide wire, improves the length detection precision, effectively improves the efficiency of the length detection and damage detection of the waveguide wire, and has certain engineering significance.)

1. A length and damage detection integrated device for a waveguide wire of a magnetostrictive liquid level meter is characterized by comprising a waveguide wire length measuring module, a magnetostrictive sensor (7), a detection module bracket (8), a device bottom plate (6), a waveguide wire winding wheel (1), a waveguide wire winding wheel bracket (16), a control module and a start-stop module;

the device comprises a device bottom plate (6), a waveguide wire length measuring module, a waveguide wire winding wheel (1), a magnetostrictive sensor (7), a start-stop module, a control module and a start-stop module, wherein the waveguide wire length measuring module is arranged in the middle of the device bottom plate (6), the waveguide wire winding wheel is fixedly arranged on one side of the device bottom plate (6) through a waveguide wire winding wheel bracket (16), the magnetostrictive sensor (7) is fixedly arranged on the other side of the device bottom plate (6) through a detection module bracket (8), the start-stop module is arranged on the waveguide wire length measuring module and is electrically connected with the waveguide wire length measuring module, and the control module is respectively connected with the start-stop module and the magnetostrictive sensor (7); the method comprises the steps that a waveguide wire (9) is wound in a waveguide wire winding wheel (1), a start-stop module is started, a waveguide wire length measuring module and a control module start to work, the waveguide wire (9) is wound in the waveguide wire length measuring module, the waveguide wire length measuring module achieves the waveguide wire length measurement, the waveguide wire with the preset length is conveyed into a magnetostrictive sensor (7) through the waveguide wire length measuring module and forms an excitation loop inside the magnetostrictive sensor, the waveguide wire length measuring module stops working, the control module continuously receives an output signal of the magnetostrictive sensor (7) and judges whether loss exists on the waveguide wire (9) with the preset length, and therefore waveguide wire length measurement and waveguide wire damage detection are achieved.

2. The integrated device for detecting the length and the damage of the waveguide wire of the magnetostrictive liquid level meter according to claim 1, wherein the waveguide wire length measuring module comprises a stepping motor (2), a waveguide wire grooved wheel (4) and a photoelectric encoder (3);

step motor (2) fixed mounting is in the centre of device bottom plate (6), coaxial coupling waveguide silk sheave (4) on the output shaft of step motor (2), and photoelectric encoder (3) are installed on waveguide silk sheave (4) for the displacement that record waveguide silk sheave (4) rotated, and step motor (2) and photoelectric encoder (3) all link to each other with opening the stop module.

3. The integrated device for detecting the length and the damage of the waveguide wire of the magnetostrictive liquid level meter according to claim 2, characterized in that the waveguide wire grooved wheel (4) is provided with a circle of groove, and one or more circles of waveguide wires (9) are embedded in the groove.

4. The integrated device for detecting the length and the damage of the waveguide wire of the magnetostrictive liquid level meter according to claim 2, characterized in that the photoelectric encoder (3) is an absolute photoelectric encoder.

5. An integrated magnetostrictive level gauge waveguide wire length and damage detection device according to claim 1, characterized in that the preset length of the waveguide wire (9) does not exceed the measured length of the waveguide wire in the magnetostrictive sensor (7).

Technical Field

The invention relates to a length measuring device of a waveguide wire in the field of length measurement, in particular to a length and damage detection integrated device of a waveguide wire of a magnetostrictive liquid level meter.

Background

Before the magnetostrictive liquid level meter is used, the length of the waveguide wire needs to be measured, and the undamaged waveguide wire with the specified length needs to be cut off for subsequent use. The most common method at present is to manually measure by using a ruler and perform related detection on the corresponding waveguide wire, and the method has low execution efficiency, low measurement precision and easy damage to the waveguide wire. There is an urgent need for a device capable of realizing automatic measurement to improve the waveguide fiber length detection efficiency and nondestructive detection and improve the detection precision.

Disclosure of Invention

In order to solve the problems and requirements in the background art, the invention provides an integrated device for detecting the length and the damage of a waveguide wire of a magnetostrictive liquid level meter, which can realize automatic measurement and nondestructive detection of the waveguide wire, and compared with the traditional manual measurement and detection, the integrated device has the advantages that the detection efficiency is greatly improved, and the detection precision is also greatly improved.

In order to realize the purpose, the invention adopts the following technical scheme:

the device comprises a waveguide wire length measuring module, a magnetostrictive sensor, a detection module bracket, a device bottom plate, a waveguide wire winding wheel bracket, a control module and a start-stop module;

the device comprises a device bottom plate, a waveguide wire length measuring module, a waveguide wire winding wheel, a magnetostrictive sensor, a start-stop module, a control module and a magnetostrictive sensor, wherein the waveguide wire length measuring module is arranged in the middle of the device bottom plate, the waveguide wire winding wheel is fixedly arranged on one side of the device bottom plate through a waveguide wire winding wheel bracket, the magnetostrictive sensor is fixedly arranged on the other side of the device bottom plate through a detection module bracket, the start-stop module is arranged on the waveguide wire length measuring module and is electrically connected with the waveguide wire length measuring module, and the control module is respectively connected with the start-stop module and the magnetostrictive sensor; the method comprises the following steps that a waveguide wire is wound in a waveguide wire winding wheel, a start-stop module is started, a waveguide wire length measuring module and a control module start to work, the waveguide wire is wound in the waveguide wire length measuring module, the waveguide wire length measuring module achieves the measurement of the length of the waveguide wire, the waveguide wire with the preset length is conveyed into a magnetostrictive sensor through the waveguide wire length measuring module and forms an excitation loop inside the magnetostrictive sensor, the waveguide wire length measuring module stops working, the control module continuously receives an output signal of the magnetostrictive sensor and judges whether loss exists on the waveguide wire with the preset length, and therefore the waveguide wire length measurement and the waveguide wire damage detection are achieved.

The waveguide fiber length measuring module comprises a stepping motor, a waveguide fiber grooved wheel and a photoelectric encoder;

the stepping motor is fixedly installed in the middle of the device bottom plate, an output shaft of the stepping motor is coaxially connected with the waveguide wire grooved wheel, the photoelectric encoder is installed on the waveguide wire grooved wheel and used for recording the rotating displacement of the waveguide wire grooved wheel, and the stepping motor and the photoelectric encoder are both connected with the start-stop module.

The grooved pulley of the waveguide wire is provided with a circle of groove, and one or more circles of waveguide wires are embedded in the groove.

The photoelectric encoder adopts an absolute photoelectric encoder.

The preset length of the waveguide wire does not exceed the measurement length of the waveguide wire in the magnetostrictive sensor.

The invention has the following beneficial effects:

the invention utilizes the photoelectric encoder to measure the length of the waveguide wire, does not need manual measurement by utilizing a ruler, realizes automatic measurement and reduces errors caused by human subjectivity. And the fixed-length waveguide wire measured by the photoelectric encoder is conveyed to the magnetostrictive sensor, and the detection module in the sensor performs nondestructive detection on the waveguide wire, so that integration of length measurement and damage detection is completed.

Compared with the prior art, the method has the advantages that damage detection is directly carried out after the length measurement, and finally the waveguide fiber is obtained by interception, so that the measurement and detection efficiency is greatly improved, and the detection precision is also greatly improved.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of a magnetostrictive sensor.

FIG. 3 is a schematic diagram of detecting a damage pulse of a waveguide fiber.

Fig. 4 is a top view of the device.

In the figure: 1. the device comprises a waveguide wire winding wheel, 2, a stepping motor, 3, a photoelectric encoder, 4, a waveguide wire grooved wheel, 5, a waveguide wire guide assembly, 6, a device bottom plate, 7, a magnetostrictive sensor, 8, a detection module support, 9, a waveguide wire, 10, a tail end damper, 11, a cursor magnetic ring, 12, a protective layer, 13, a shielding layer, 14, a wave detection device, 15, an excitation pulse, 16 and a waveguide wire winding wheel support.

Detailed Description

As shown in fig. 1, 3 and 4, the invention includes a waveguide fiber length measuring module, a magnetostrictive sensor 7, a detecting module support 8, a waveguide fiber guiding assembly 5, a device bottom plate 6, a waveguide fiber winding wheel support 16, a waveguide fiber winding wheel 1, a control module and a start-stop module;

the device comprises a device bottom plate 6, a waveguide wire length measuring module, a waveguide wire winding wheel 1, a magnetostrictive sensor 7, a start-stop module and a control module, wherein the waveguide wire length measuring module is arranged in the middle of the upper surface of the device bottom plate 6, the waveguide wire winding wheel 1 is fixedly arranged on one side of the upper surface of the device bottom plate 6 through a waveguide wire winding wheel bracket 16, the magnetostrictive sensor 7 is fixedly arranged on the other side of the upper surface of the device bottom plate 6 through a detection module bracket 8, the start-stop module is arranged on the waveguide wire length measuring module and is electrically connected with the waveguide wire length measuring module, and the control module is respectively connected with the start-stop module and the magnetostrictive sensor 7; the method comprises the steps that a waveguide wire 9 is wound in a waveguide wire winding wheel 1, a start-stop module is started, a waveguide wire length measuring module and a control module start to work, one end of the waveguide wire 9 with a preset length is conveyed into a magnetostrictive sensor 7 through the waveguide wire length measuring module, an excitation loop is formed inside the magnetostrictive sensor, the waveguide wire length measuring module stops working, the control module continuously receives an output signal of the magnetostrictive sensor 7, the control module judges whether loss exists on the waveguide wire 9 with the preset length according to the output signal, therefore, waveguide wire length measurement and waveguide wire damage detection are achieved, the waveguide wire length measuring module starts to work again, the waveguide wire with the preset length is conveyed out of an excitation end of the magnetostrictive sensor 7 and then is manually intercepted, and the next section of waveguide wire is detected after the interception. In a specific embodiment, the cutting is performed with a tool such as scissors, wherein the predetermined length of the waveguide wire 9 does not exceed the measured length of the waveguide wire in the magnetostrictive sensor 7.

The waveguide fiber length measuring module comprises a stepping motor 2, a waveguide fiber grooved wheel 4 and an absolute photoelectric encoder 3; the stepping motor 2 is fixedly installed in the middle of the upper surface of the device bottom plate 6 through a motor support, an output shaft of the stepping motor 2 is coaxially connected with the waveguide wire grooved wheel 4, and the absolute photoelectric encoder 3 is installed on the waveguide wire grooved wheel 4 and rotates together with the waveguide wire grooved wheel 4 and is used for recording the rotation displacement of the waveguide wire grooved wheel 4, so that the conveying displacement of the waveguide wire is recorded, and the length of the waveguide wire is obtained. The waveguide wire grooved wheel 4 is made of a material with a large friction coefficient, and detection errors caused by slipping of the waveguide wire in the conveying process are avoided. The waveguide wire grooved wheel 4 is provided with a shallow groove, and one or more circles of waveguide wires are embedded in the groove, so that the groove can ensure that the waveguide wires can smoothly pass through without being extruded and deformed. Step motor 2 and photoelectric encoder 3 all link to each other with opening and stop the module.

The working principle and the process of the invention are as follows:

when length detection is needed, a waveguide wire is wound in a groove of a waveguide wire grooved pulley 4, the length of the waveguide wire is set in a control module, a start button in a start-stop module is pressed, a stepping motor 2 starts to work, an output shaft of the stepping motor 2 drives the waveguide wire grooved pulley 4 to rotate, the waveguide wire is conveyed to a magnetostrictive sensor 7 under the action of the waveguide wire grooved pulley 4, a photoelectric encoder 3 starts to record the rotating displacement of the waveguide wire grooved pulley 4, when the displacement recorded by the photoelectric encoder is equal to the set waveguide wire length, the stepping motor 2 stops rotating, the waveguide wire with the preset length is conveyed to a waveguide wire guide assembly 5 of the magnetostrictive sensor 7, and an excitation loop is formed inside the magnetostrictive sensor. The waveguide wire guide assembly 5 is a housing of the magnetostrictive sensor 7, the vernier magnetic ring 11 is sleeved outside the waveguide wire guide assembly 5, and the end damper 10, the vernier magnetic ring 11, the protective layer 12, the shielding layer 13 and the wave detection device 14 of the magnetostrictive sensor 7 are all arranged in the waveguide wire guide assembly 5, as shown in fig. 2.

Then, the end of the waveguide wire 9 is used as an excitation end, the position of the waveguide wire close to the end damper 10 of the magnetostrictive sensor 7 is used as the end of the waveguide wire, the shielding layer 13 in the magnetostrictive sensor 7 is sleeved on the waveguide wire, the waveguide wire at the two ends of the shielding layer 13 is provided with the protective layer 12, the wave detection device 14 is arranged on the shielding layer 13, the excitation module in the sensor electronic bin in the magnetostrictive sensor 7 applies an excitation pulse 15 (as shown in fig. 3) to the excitation end of the magnetostrictive waveguide wire, and simultaneously sends the excitation pulse 15 to the control module, the excitation pulse forms a circumferential ampere annular magnetic field around the waveguide wire at the light speed, the ampere annular magnetic field is coupled with the position permanent magnetic field of the cursor magnetic ring 11, a 'widemann effect' torsional stress wave is formed on the surface of the waveguide wire 9, the torsional stress wave propagates from the generation point to the two ends of the waveguide wire at the wave speed (about 2830m/s), the torsional stress wave transmitted to the tail end is absorbed by a damping device (namely a tail end damper 10), the torsional stress wave transmitted to the excitation end is received by a detection device 14, the detection device 14 sends a receiving signal to a control module, and the output signal of the magnetostrictive sensor 7 is an excitation pulse and the receiving signal, and has a time difference.

The control module calculates the time difference between the excitation pulse and the received signal, and the time difference is multiplied by the propagation speed of the torsional stress wave in the waveguide wire to calculate the force-applying position of the torsional wave (namely the position of the vernier magnetic ring), wherein the vernier magnetic ring 11 is arranged at the tail end of the waveguide wire, and the measurement reference point is the excitation end of the waveguide wire, so that the real-time accurate measurement of the position of the vernier magnetic ring is realized.

If the waveguide wire between the vernier magnetic ring and the measuring reference point is damaged, the pulse cannot reach the position of the magnetic ring and cannot be coupled with the magnetic field formed by the magnetic ring, and the torsional wave generated by coupling cannot be measured, so that the position of the vernier magnetic ring cannot be accurately calculated, and whether the waveguide wire pulse is damaged or not can be known.