阅读说明：本技术 一种可调整反射片支架的超声波流量计 (Ultrasonic flowmeter with adjustable reflector plate support ) 是由 严军荣 卢玉龙 宋财华 王晟 于 2021-09-15 设计创作，主要内容包括：本发明公开了一种可调整反射片支架的超声波流量计,包括超声波流量计壳体、超声波换能器、超声波换能器下方的反射片及反射片支架,其特征在于：所述反射片支架连接用于调整反射片支架的角度和位置的调节装置,所述调节装置采用超声波反射片异常校正算法对反射片支架进行调整。本发明解决了超声波流量计如何在清洗完成后对超声波反射片状态进行有效校正的问题。(The invention discloses an ultrasonic flowmeter with an adjustable reflector bracket, which comprises an ultrasonic flowmeter shell, an ultrasonic transducer, a reflector below the ultrasonic transducer and a reflector bracket, and is characterized in that: the reflector bracket is connected with an adjusting device used for adjusting the angle and the position of the reflector bracket, and the adjusting device adjusts the reflector bracket by adopting an ultrasonic reflector abnormity correction algorithm. The invention solves the problem of how to effectively correct the state of the ultrasonic reflector after the ultrasonic flowmeter is cleaned.)

1. The utility model provides an ultrasonic flowmeter of adjustable reflector plate support, includes ultrasonic flowmeter casing, ultrasonic transducer, reflector plate and reflector plate support of ultrasonic transducer below, its characterized in that: the reflector bracket is connected with an adjusting device used for adjusting the angle and the position of the reflector bracket, and the adjusting device adjusts the reflector bracket by adopting an ultrasonic reflector abnormity correction algorithm.

2. The ultrasonic flowmeter of claim 1, wherein the means for connecting the adjusting means to the reflector holder comprises any one or more of clamping, gluing, welding, interference fitting, and threading.

3. The ultrasonic flow meter with adjustable reflector bracket as claimed in claim 1, wherein the adjusting device adjusts the reflector bracket by using an ultrasonic reflector abnormality correction algorithm, comprising the steps of:

calculating an abnormal index of the ultrasonic reflector according to the angle change value of the ultrasonic reflector and/or the surface roughness of the ultrasonic reflector and/or the displacement data of the ultrasonic reflector;

calculating an abnormal tolerance value according to the ultrasonic wave receiving range and/or the receiving capacity of the ultrasonic transducer;

and when the abnormal index of the ultrasonic reflector is larger than the abnormal allowable value, calculating the angle and/or displacement of the ultrasonic reflector to be adjusted according to the difference value between the abnormal index and the abnormal allowable value, and adjusting.

4. The ultrasonic flow meter with adjustable reflector bracket as claimed in claim 3, wherein the angle variation value of the ultrasonic reflector is any one or more combination of the angle variation value within the preset time period of a single reflector and the angle variation value within the preset time period of two ultrasonic reflectors.

5. The ultrasonic flowmeter of claim 3, wherein the surface roughness of the ultrasonic reflector is calculated from the difference between the emission intensity and the reception intensity of the detected sound wave and/or from the surface flatness of the ultrasonic reflector detected by the laser detector and/or from the thickness variation of the ultrasonic reflector over a certain period of time.

6. The ultrasonic flowmeter capable of adjusting the reflector bracket as claimed in claim 3, wherein the displacement data of the ultrasonic reflector is any one or more combination of a horizontal position change value within a preset time period of the ultrasonic reflector bracket, a vertical position change value within a preset time period of the ultrasonic reflector bracket, and a relative position change value within a preset time period of the ultrasonic reflector and the ultrasonic reflector bracket.

7. The ultrasonic flowmeter capable of adjusting the reflector bracket as claimed in claim 3, wherein the calculating of the abnormality index of the ultrasonic reflector based on the angle change value of the ultrasonic reflector and/or the surface roughness of the ultrasonic reflector and/or the displacement data of the ultrasonic reflector is: calculating an abnormal index of the ultrasonic reflector from the influence of the change of the angle of the ultrasonic reflector on the ultrasonic reception, calculating an abnormal index of the ultrasonic reflector from the relation between the surface roughness of the ultrasonic reflector and the ultrasonic reflection attenuation, calculating an abnormal index of the ultrasonic reflector from the influence of the displacement of the ultrasonic reflector on the ultrasonic reception, calculating an abnormal index of the ultrasonic reflector from the relation between the influence of the change of the angle of the ultrasonic reflector on the ultrasonic reception and the surface roughness of the ultrasonic reflector and the ultrasonic reflection attenuation, calculating an abnormal index of the ultrasonic reflector from the relation between the change of the angle and the displacement of the ultrasonic reflector on the ultrasonic reception, calculating an abnormal index of the ultrasonic reflector from the relation between the surface roughness of the ultrasonic reflector and the ultrasonic reflection attenuation and the influence of the displacement of the ultrasonic reflector on the ultrasonic reception, calculating an abnormal index of the ultrasonic reflector, calculating a change of the ultrasonic reflector based on the influence of the change of the surface roughness of the ultrasonic reflector on the ultrasonic reflection attenuation, calculating an abnormal index of the ultrasonic reflector based on the influence of the displacement of the ultrasonic reflector on the ultrasonic reception, calculating an abnormal index of the ultrasonic reflector, And calculating any one of the abnormal indexes of the ultrasonic reflector according to the influence of the angle change and the displacement of the ultrasonic reflector on the ultrasonic receiving and the relation between the surface roughness of the ultrasonic reflector and the ultrasonic reflection attenuation.

8. The ultrasonic flowmeter capable of adjusting the reflection sheet holder according to claim 3, wherein the calculation of the abnormality tolerance value based on the ultrasonic wave receiving range and/or the receiving capability of the ultrasonic transducer is: any one of calculating the maximum deflection angle of the ultrasonic reflection sheet according to the ultrasonic wave receiving range of the ultrasonic transducer and calculating the abnormal allowable value based on the maximum deflection angle, calculating the maximum attenuation value of the ultrasonic wave according to the receiving capacity of the ultrasonic transducer and calculating the abnormal allowable value based on the maximum deflection angle and the maximum attenuation value of the ultrasonic wave.

9. The ultrasonic flowmeter capable of adjusting the reflector bracket as claimed in claim 3, wherein the calculating and adjusting the angle and/or displacement of the ultrasonic reflector to be adjusted according to the difference between the abnormality index and the abnormality tolerance comprises the steps of:

calculating the difference value between the abnormal index and the abnormal allowable value of the ultrasonic reflector;

calculating angle and/or displacement data of the ultrasonic reflector corresponding to the difference value according to the relation between the abnormal index of the ultrasonic reflector and the angle and/or displacement data of the ultrasonic reflector, namely the angle and/or displacement of the ultrasonic reflector needing to be adjusted;

the angle and/or displacement of the ultrasonic reflection sheet can be adjusted according to the requirement, and the ultrasonic emission sheet or the reflection sheet bracket is extruded to the corresponding angle and/or displacement.

10. The ultrasonic flowmeter of claim 1, wherein the means for adjusting the reflector support comprises any one or more of rotating the adjustment means to change the angle of the reflector support, translating the adjustment means to change the position of the reflector support, wrapping the adjustment means around the reflector support, and pressing the reflector support to change the angle and position of the support.

Technical Field

The invention belongs to the technical field of intelligent ultrasonic flowmeters, and particularly relates to an ultrasonic flowmeter with an adjustable reflector plate bracket.

Background

The ultrasonic flowmeter needs to finish measurement through ultrasonic emission and reflection, and scale deposited on the emission and reflection sheets of the ultrasonic flow sensor used for a long time can seriously influence the measurement precision. At present, a technology for cleaning an ultrasonic reflection sheet, for example, chinese patent "cleaning ultrasonic meter without detaching" with publication number CN102410857A, proposes that a connection plug is connected to a handheld cleaning machine of an ultrasonic meter, cleaning energy on the handheld cleaning machine is transmitted to cleaning transducers through the connection plug, and at least one of the cleaning transducers is installed between the measuring transducers. Chinese patent CN110793582A, "an ultrasonic water meter accurate measurement detection device", proposes that after a large amount of scale deposits on the reflector plate, the electric push rod contracts to drive the mounting plate to move, and further drive the slide rod to move upward, lift the turntable to make the cleaning brush adhere to the reflector plate, and start the second driving device to drive the cleaning brush to rotate, and further the scale on the surface of the reflector plate can be removed by the cleaning brush, thereby improving the cleanliness of the surface of the reflector plate.

According to the technical scheme, the ultrasonic reflector plate is cleaned on the premise that the ultrasonic flowmeter is not detached, but the position or the angle of the reflector plate is changed in the process of cleaning the reflector plate by using the motor or the cleaning mechanism, so that the metering precision is influenced. At present, an ultrasonic flowmeter for effectively correcting the ultrasonic reflector shape after cleaning is not available, and therefore an ultrasonic flowmeter with an adjustable reflector bracket is provided.

Disclosure of Invention

The invention provides an ultrasonic flowmeter with an adjustable reflector bracket to solve the problems.

The invention relies on monitoring sensors deployed within an ultrasonic flow meter.

The invention relates to an ultrasonic flowmeter capable of adjusting a reflector bracket, which comprises an ultrasonic flowmeter shell, an ultrasonic transducer, a reflector below the ultrasonic transducer and the reflector bracket, and is characterized in that: the reflector bracket is connected with an adjusting device used for adjusting the angle and the position of the reflector bracket, and the adjusting device adjusts the reflector bracket by adopting an ultrasonic reflector abnormity correction algorithm.

Preferably, the connection mode of the adjusting device and the reflector bracket comprises any one or more of clamping, gluing, welding, tight fitting and screw thread.

Preferably, the adjusting device adjusts the reflector bracket by using an ultrasonic reflector abnormality correction algorithm, and includes the steps of:

calculating an abnormal index of the ultrasonic reflector according to the angle change value of the ultrasonic reflector and/or the surface roughness of the ultrasonic reflector and/or the displacement data of the ultrasonic reflector;

calculating an abnormal tolerance value according to the ultrasonic wave receiving range and/or the receiving capacity of the ultrasonic transducer;

and when the abnormal index of the ultrasonic reflector is larger than the abnormal allowable value, calculating the angle and/or displacement of the ultrasonic reflector to be adjusted according to the difference value between the abnormal index and the abnormal allowable value, and adjusting.

Further preferably, the angle variation value of the ultrasonic wave reflection sheet is any one or more of an angle variation value within a preset time period of a single reflection sheet and a difference between angle variation values within preset time periods of two ultrasonic wave emission sheets.

Further preferably, the surface roughness of the ultrasonic reflector is obtained according to the difference between the emission intensity and the receiving intensity of the detected sound wave and/or is calculated according to the surface flatness of the ultrasonic reflector detected by a laser detector and/or is calculated according to the thickness change value of the ultrasonic reflector within a certain time.

Further preferably, the displacement data of the ultrasonic reflector is any one or more of a horizontal position change value within a preset time period of the ultrasonic reflector bracket, a vertical position change value within a preset time period of the ultrasonic reflector bracket, and a relative position change value within a preset time period of the ultrasonic reflector bracket and the ultrasonic reflector bracket.

Further preferably, the calculating of the abnormality index of the ultrasonic reflector according to the angle change value of the ultrasonic reflector and/or the surface roughness of the ultrasonic reflector and/or the displacement data of the ultrasonic reflector is: calculating an abnormal index of the ultrasonic reflector from the influence of the change of the angle of the ultrasonic reflector on the ultrasonic reception, calculating an abnormal index of the ultrasonic reflector from the relation between the surface roughness of the ultrasonic reflector and the ultrasonic reflection attenuation, calculating an abnormal index of the ultrasonic reflector from the influence of the displacement of the ultrasonic reflector on the ultrasonic reception, calculating an abnormal index of the ultrasonic reflector from the relation between the influence of the change of the angle of the ultrasonic reflector on the ultrasonic reception and the surface roughness of the ultrasonic reflector and the ultrasonic reflection attenuation, calculating an abnormal index of the ultrasonic reflector from the relation between the change of the angle and the displacement of the ultrasonic reflector on the ultrasonic reception, calculating an abnormal index of the ultrasonic reflector from the relation between the surface roughness of the ultrasonic reflector and the ultrasonic reflection attenuation and the influence of the displacement of the ultrasonic reflector on the ultrasonic reception, calculating an abnormal index of the ultrasonic reflector, calculating a change of the ultrasonic reflector based on the influence of the change of the surface roughness of the ultrasonic reflector on the ultrasonic reflection attenuation, calculating an abnormal index of the ultrasonic reflector based on the influence of the displacement of the ultrasonic reflector on the ultrasonic reception, calculating an abnormal index of the ultrasonic reflector, And calculating any one of the abnormal indexes of the ultrasonic reflector according to the influence of the angle change and the displacement of the ultrasonic reflector on the ultrasonic receiving and the relation between the surface roughness of the ultrasonic reflector and the ultrasonic reflection attenuation.

Further preferably, the calculating of the abnormality tolerance according to the ultrasonic wave receiving range and/or the receiving capability of the ultrasonic transducer is: any one of calculating the maximum deflection angle of the ultrasonic reflection sheet according to the ultrasonic wave receiving range of the ultrasonic transducer and calculating the abnormal allowable value based on the maximum deflection angle, calculating the maximum attenuation value of the ultrasonic wave according to the receiving capacity of the ultrasonic transducer and calculating the abnormal allowable value based on the maximum deflection angle and the maximum attenuation value of the ultrasonic wave.

Further preferably, the calculating and adjusting the angle and/or displacement of the ultrasonic reflector to be adjusted according to the difference between the abnormality index and the abnormality tolerance includes:

calculating the difference value between the abnormal index and the abnormal allowable value of the ultrasonic reflector;

calculating angle and/or displacement data of the ultrasonic reflector corresponding to the difference value according to the relation between the abnormal index of the ultrasonic reflector and the angle and/or displacement data of the ultrasonic reflector, namely the angle and/or displacement of the ultrasonic reflector needing to be adjusted;

the angle and/or displacement of the ultrasonic reflection sheet can be adjusted according to the requirement, and the ultrasonic emission sheet or the reflection sheet bracket is extruded to the corresponding angle and/or displacement.

Preferably, the adjusting means for adjusting the reflector holder includes any one or more of rotating the adjusting means to change the angle of the reflector holder, translating the adjusting means to change the position of the reflector holder, and wrapping and pressing the reflector holder by the adjusting means to change the angle and position of the holder.

The method and the system have the advantages that:

(1) the current state of the ultrasonic reflector can be known more comprehensively by detecting the angle change value of the ultrasonic reflector and/or the surface roughness of the ultrasonic reflector and/or the displacement data of the ultrasonic reflector through the sensor.

(2) The maximum deviation angle and the abnormal tolerance value of the ultrasonic reflection sheet are calculated according to the ultrasonic receiving range and/or the receiving capacity of the ultrasonic transducer, and the angle or the position of the reflection sheet required to be adjusted is calculated, so that the state of the ultrasonic reflection sheet can be effectively corrected.

Drawings

FIG. 1 is a schematic diagram of an ultrasonic flow meter with an adjustable reflector bracket according to an embodiment of the invention;

fig. 2 is a flowchart of the steps of adjusting the reflector holder according to the embodiment of the invention.

Detailed Description

The following describes in detail preferred embodiments of the present invention.

The invention relies on monitoring sensors deployed in a flowmeter, and comprises one or more test sound wave transmitting and receiving devices deployed right above an ultrasonic reflector, displacement sensors deployed on an ultrasonic reflector bracket, laser detectors deployed on the side of the ultrasonic reflector, vibration sensors deployed on the ultrasonic reflector bracket and the like.

The embodiment of the invention relates to an ultrasonic flowmeter with an adjustable reflector bracket, the structural schematic diagram of which is shown in fig. 1, and the ultrasonic flowmeter comprises an ultrasonic flowmeter shell (1), an ultrasonic transducer (2), a reflector below the ultrasonic transducer and a reflector bracket (3), and is characterized in that:

the reflector bracket is connected with an adjusting device (4) used for adjusting the angle and the position of the reflector bracket, and the adjusting device (4) adjusts the reflector bracket by adopting an ultrasonic reflector abnormity correction algorithm.

Preferably, the connection mode of the adjusting device (4) and the reflector bracket comprises any one or more of clamping, gluing, welding, tight fitting and screw thread.

The adjusting device adopts an ultrasonic reflector plate abnormity correction algorithm to adjust the reflector plate bracket, and a flow chart is shown in figure 2 and comprises the following steps:

calculating an abnormal index of the ultrasonic reflector according to the angle change value of the ultrasonic reflector and/or the surface roughness of the ultrasonic reflector and/or the displacement data of the ultrasonic reflector;

calculating an abnormal tolerance value according to the ultrasonic wave receiving range and/or the receiving capacity of the ultrasonic transducer;

and when the abnormal index of the ultrasonic reflector is larger than the abnormal allowable value, calculating the angle and/or displacement of the ultrasonic reflector to be adjusted according to the difference value between the abnormal index and the abnormal allowable value, and adjusting.

The angle change value of the ultrasonic reflector is any one or more of the angle change value in a preset time period of a single reflector and the difference between the angle change values in the preset time periods of two ultrasonic transmitting sheets. In a preferred embodiment, a test sound wave transmitting and receiving device is arranged at an original parallel position right above an ultrasonic reflector of the flowmeter, the test sound wave transmitting and receiving device transmits and receives a detection sound wave to and from the current ultrasonic reflector, the distance between the receiving position and the transmitting position is obtained, and the angle change value of a single reflector in a preset time period is calculated according to the geometric relationship between the distance and the angle change value of the reflector. In another preferred embodiment, the method is adopted to calculate the angle change values of the two reflecting sheets in the preset time period respectively, and calculate the difference between the angle change values of the two ultrasonic transmitting sheets in the preset time period. In another preferred embodiment, the angle variation value is obtained according to a combination of the angle variation value of the single reflection sheet and the difference between the angle variation values within the preset time period of the two ultrasonic emission sheets, and the multiple combinations are extremum values and/or average values and/or products and/or summations among multiple items.

The surface roughness of the ultrasonic reflector is obtained according to the difference between the emission intensity and the receiving intensity of the detected sound wave and/or calculated according to the surface flatness of the ultrasonic reflector detected by a laser detector and/or calculated according to the thickness change value of the ultrasonic reflector within a certain time.

In table a, a1 to a7 represent different embodiments of calculating the surface roughness of the ultrasonic wave reflecting sheet, and the table a relates to data such as the emission intensity and reception intensity values of the detected sound wave, the surface flatness of the ultrasonic wave reflecting sheet, and the thickness variation value of the reflecting sheet.

Table a different embodiment for calculating the surface roughness of the ultrasonic wave reflecting sheet

The displacement data of the ultrasonic reflector is any one or combination of a horizontal position change value within a preset time period of the ultrasonic reflector bracket, a vertical position change value within a preset time period of the ultrasonic reflector bracket, and a relative position change value within a preset time period of the ultrasonic reflector and the ultrasonic reflector bracket. The term combination is extreme value and/or average value and/or product and/or summation among the terms.

The abnormal index of the ultrasonic reflector is calculated according to the angle change value of the ultrasonic reflector and/or the surface roughness of the ultrasonic reflector and/or the displacement data of the ultrasonic reflector, and is as follows: calculating an abnormal index of the ultrasonic reflector from the influence of the change of the angle of the ultrasonic reflector on the ultrasonic reception, calculating an abnormal index of the ultrasonic reflector from the relation between the surface roughness of the ultrasonic reflector and the ultrasonic reflection attenuation, calculating an abnormal index of the ultrasonic reflector from the influence of the displacement of the ultrasonic reflector on the ultrasonic reception, calculating an abnormal index of the ultrasonic reflector from the relation between the influence of the change of the angle of the ultrasonic reflector on the ultrasonic reception and the surface roughness of the ultrasonic reflector and the ultrasonic reflection attenuation, calculating an abnormal index of the ultrasonic reflector from the relation between the change of the angle and the displacement of the ultrasonic reflector on the ultrasonic reception, calculating an abnormal index of the ultrasonic reflector from the relation between the surface roughness of the ultrasonic reflector and the ultrasonic reflection attenuation and the influence of the displacement of the ultrasonic reflector on the ultrasonic reception, calculating an abnormal index of the ultrasonic reflector, calculating a change of the ultrasonic reflector based on the influence of the change of the surface roughness of the ultrasonic reflector on the ultrasonic reflection attenuation, calculating an abnormal index of the ultrasonic reflector based on the influence of the displacement of the ultrasonic reflector on the ultrasonic reception, calculating an abnormal index of the ultrasonic reflector, And calculating any one of the abnormal indexes of the ultrasonic reflector according to the influence of the angle change and the displacement of the ultrasonic reflector on the ultrasonic receiving and the relation between the surface roughness of the ultrasonic reflector and the ultrasonic reflection attenuation.

In table B, B1 to B7 show different embodiments of calculating the abnormality index of the ultrasonic wave reflecting sheet, and the table B refers to the angle change value of the ultrasonic wave reflecting sheet, the surface roughness of the ultrasonic wave reflecting sheet, the displacement data of the ultrasonic wave reflecting sheet, and the like.

TABLE B different embodiments for calculating the anomaly index of an ultrasonic reflector

The calculation of the abnormal tolerance value according to the ultrasonic wave receiving range and/or the receiving capacity of the ultrasonic transducer is as follows: any one of calculating the maximum deflection angle of the ultrasonic reflection sheet according to the ultrasonic wave receiving range of the ultrasonic transducer and calculating the abnormal allowable value based on the maximum deflection angle, calculating the maximum attenuation value of the ultrasonic wave according to the receiving capacity of the ultrasonic transducer and calculating the abnormal allowable value based on the maximum deflection angle and the maximum attenuation value of the ultrasonic wave.

C1 to C3 in table C show different embodiments of calculating the abnormality tolerance, in which data such as the ultrasonic wave reception range and the reception capability of the ultrasonic transducer are referred to in table C.

TABLE C different embodiments for calculating anomaly tolerance values

The method for calculating and adjusting the angle and/or surface roughness and/or displacement of the ultrasonic reflector to be adjusted according to the difference value of the abnormal index and the abnormal allowable value comprises the following steps:

calculating the difference value between the abnormal index and the abnormal allowable value of the ultrasonic reflector;

calculating angle and/or surface roughness and/or displacement data of the ultrasonic reflector corresponding to the difference according to the relation between the abnormal index of the ultrasonic reflector and the angle and/or surface roughness and/or displacement data of the ultrasonic reflector, namely the angle and/or surface roughness and/or displacement of the ultrasonic reflector needing to be adjusted;

and extruding the ultrasonic wave transmitting sheet or the ultrasonic wave reflecting sheet bracket to a corresponding angle and/or surface roughness and/or displacement according to the angle and/or surface roughness and/or displacement of the ultrasonic wave reflecting sheet which is adjusted according to the requirement.

In this embodiment, a difference z between an abnormal index x of the ultrasonic reflector and an abnormal allowable value y is calculated, and an angle and/or displacement data of the ultrasonic reflector corresponding to the difference z is calculated according to a functional relationship between the angle and/or displacement data of the ultrasonic reflector and the abnormal index of the ultrasonic reflector in any one of the tables B, that is, the angle and/or displacement of the ultrasonic reflector to be adjusted; the angle and/or displacement of the ultrasonic reflection sheet can be adjusted according to the requirement, and the ultrasonic emission sheet or the reflection sheet bracket is extruded to the corresponding angle and/or displacement.

In a preferred embodiment, the abnormality index x of the ultrasonic reflection sheet is 2 according to B7 in table B, the abnormality tolerance y is 1.8 according to C3 in table C, when the abnormality index x of the ultrasonic reflection sheet is greater than the abnormality tolerance y, the difference z is 0.2, when the angle of the ultrasonic reflection sheet corresponding to the difference z is 0.2 × 0.2 to 0.04 degrees (r1 is 0.2) according to the functional relationship x between the angle v of the ultrasonic reflection sheet and the abnormality index x of the ultrasonic reflection sheet in table B1 in table B and r1 v, the angle of the ultrasonic reflection sheet to be adjusted is 0.04 degrees, and the ultrasonic transmission sheet or the reflection sheet holder is pressed to the corresponding angle according to the angle of the ultrasonic reflection sheet to be adjusted, which is 0.04 degrees.

In another preferred embodiment, the abnormality index x of the ultrasonic reflection sheet is 2 according to B7 in table B, and the allowable abnormality value y is 1.8 according to C3 in table C, where the abnormality index x of the ultrasonic reflection sheet is>The difference z is 0.2, and the functional relation x between the displacement m of the ultrasonic reflection sheet and the abnormality index x of the ultrasonic reflection sheet in B3 in Table B is r8 m^r9Calculating the displacement of the ultrasonic reflector corresponding to the difference z as r8 & 0.2^r9The displacement of the ultrasonic reflection sheet to be adjusted is 0.32 cm (r8 is 8, r9 is 2), and the ultrasonic emission sheet or the reflection sheet support is pressed to the corresponding position according to the displacement of the ultrasonic reflection sheet to be adjusted of 0.32 cm.

Preferably, the adjusting means for adjusting the reflector holder includes any one or more of rotating the adjusting means to change the angle of the reflector holder, translating the adjusting means to change the position of the reflector holder, and wrapping and pressing the reflector holder by the adjusting means to change the angle and position of the holder. In the embodiment, the adjusting device (4) is a knob device and/or a push-pull device and/or a wrapping device which are connected with the reflector bracket, and the position and/or the angle of the reflector bracket are adjusted by any one or more of rotary extrusion, translational extrusion and wrapping extrusion.

Of course, those skilled in the art should realize that the above embodiments are only used for illustrating the present invention, and not as a limitation to the present invention, and that the changes and modifications of the above embodiments will fall within the protection scope of the present invention as long as they are within the scope of the present invention.