CN108051069B - Calibration method of X-ray nucleon balance and X-ray nucleon balance - Google Patents
Calibration method of X-ray nucleon balance and X-ray nucleon balance Download PDFInfo
- Publication number
- CN108051069B CN108051069B CN201810017206.3A CN201810017206A CN108051069B CN 108051069 B CN108051069 B CN 108051069B CN 201810017206 A CN201810017206 A CN 201810017206A CN 108051069 B CN108051069 B CN 108051069B
- Authority
- CN
- China
- Prior art keywords
- ray
- tube
- source
- zero point
- parameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000005303 weighing Methods 0.000 claims abstract description 71
- 239000000463 material Substances 0.000 claims description 33
- 238000005259 measurement Methods 0.000 claims description 31
- 238000005070 sampling Methods 0.000 claims description 27
- 238000004891 communication Methods 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 abstract description 7
- 239000003245 coal Substances 0.000 description 11
- 230000008859 change Effects 0.000 description 8
- 230000005855 radiation Effects 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000012888 cubic function Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G9/00—Methods of, or apparatus for, the determination of weight, not provided for in groups G01G1/00 - G01G7/00
- G01G9/005—Methods of, or apparatus for, the determination of weight, not provided for in groups G01G1/00 - G01G7/00 using radiations, e.g. radioactive
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention provides a calibration method of an X-ray nucleon scale and the X-ray nucleon scale. The calibration method provided by the invention is applied to an X-ray nucleon balance, and the X-ray nucleon balance comprises the following components: an X-ray source, an X-ray detector, a bracket and a weighing instrument; the method comprises the following steps: the weighing instrument acquires the X-ray energy and intensity output by the X-ray detector and the tube voltage parameter and the tube current parameter sent by the X-ray source; the weighing instrument respectively determines the offset of the tube voltage parameter and the offset of the tube current parameter according to the tube voltage parameter and the tube current parameter; the X-ray source adjusts the tube voltage parameter and the tube current parameter according to the offset of the tube voltage parameter and the offset of the tube current parameter. According to the calibration method provided by the embodiment of the invention, the X-ray detector is used as a feedback sensor for monitoring the energy and the intensity of the X-rays, and the tube voltage and the tube current of the X-ray source are controlled by feedback to keep the X-ray parameters of the X-ray source constant, so that the metering stability of the X-ray nucleon balance is improved.
Description
Technical Field
The invention relates to the technical field of weighing, in particular to a calibration method of an X-ray nucleon scale and the X-ray nucleon scale.
Background
Coal has been dominant in the energy industry structure of our country. In order to improve economic benefit, coal enterprises strengthen supervision on coal production links, generally isotope nucleon scales are installed on a crossheading belt of a stoping working face, raw coal recovery rate of a mining area is supervised in real time, and effective recovery of coal resources is ensured.
The coal mining process of the coal mine stoping face adopts a reverse method to mine coal, and the belt conveyor of the underground stoping face is shortened along with the pushing of the coal mining face, so that the belt tension is changed. The isotope nucleon balance installed on the belt conveyer adopts non-contact weighing, and the isotope nucleon balance adopts measuring materials to measure isotopes 137 Cs releases the attenuation of gamma rays to weigh the materials conveyed by the conveyor, and the metering error is not influenced by the tension change of the belt, so that the weighing device is particularly suitable for metering under the environment of a coal mine stoping belt and is widely applied. Isotope element 137 The single-energy gamma rays generated by Cs have constant attenuation coefficient, high metering precision and good linearity.
However, the radioisotope used in the above-mentioned isotope nucleon balance 137 Cs exist in a certain radiationThe problem of shot residue.
Disclosure of Invention
The invention provides a calibration method of an X-ray nucleon scale and the X-ray nucleon scale, which are used for solving the problem that the existing isotope nucleon scale has certain radiation residues.
In a first aspect, the present invention provides a method for calibrating an X-ray nucleon scale, applied to an X-ray nucleon scale, the X-ray nucleon scale comprising: an X-ray source, an X-ray detector, a bracket and a weighing instrument; wherein the X-ray source is arranged at one end of the bracket; the other end of the bracket is arranged on the X-ray detector; a belt for conveying the tested materials is arranged between the X-ray source and the X-ray detector; the X-ray detector is connected with the weighing instrument; the method comprises the following steps:
the weighing instrument acquires the energy and intensity of the X-rays output by the X-ray detector, and acquires the tube voltage parameter and the tube current parameter sent by the X-ray source;
the weighing instrument respectively determines the offset of the tube voltage parameter and the offset of the tube current parameter according to the X-ray energy and intensity, the tube voltage parameter and the tube current parameter, and sends the offset and the offset to the X-ray source;
the X-ray source adjusts the tube voltage parameter and the tube current parameter according to the offset of the tube voltage parameter and the offset of the tube current parameter.
In a second aspect, the present invention provides an X-ray nucleon balance comprising:
an X-ray source, an X-ray detector, a bracket and a weighing instrument;
wherein the X-ray source is arranged at one end of the bracket; the other end of the bracket is arranged on the X-ray detector; a belt for conveying the tested materials is arranged between the X-ray source and the X-ray detector;
the X-ray detector is connected with the weighing instrument;
the weighing instrument is used for determining the offset of the tube voltage and the tube current parameters according to the energy and the intensity of the X-ray output by the X-ray detector and acquiring the tube voltage and the tube current parameters sent by the X-ray source and sending the offset to the X-ray source;
the X-ray source is used for adjusting the tube voltage and tube current parameters according to the offset of the tube voltage and tube current parameters.
The calibration method of the X-ray nucleon balance provided by the invention uses the X-ray detector as a feedback sensor for monitoring the energy and intensity of the X-rays, and maintains the X-ray parameters of the X-ray source to be constant by controlling the tube voltage and the tube current of the X-ray source in a feedback way, so that the measurement stability of the X-ray nucleon balance is improved, and after an alternating current power supply of the X-ray source is closed, no X-rays are generated, no radiation residue problem exists, no waste source treatment problem is needed to be considered, and the environmental impact is small.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1 is a schematic view of an embodiment of an X-ray nucleon balance according to the present invention;
FIG. 2 is a flow chart of an embodiment of a method for calibrating an X-ray nucleon balance according to the present invention;
FIG. 3 is a schematic view of an embodiment of an X-ray source of an X-ray nuclear scale according to the present invention;
fig. 4 is a schematic view of an X-ray source structure of another embodiment of an X-ray nucleon balance according to the present invention.
Reference numerals illustrate:
1. an X-ray source;
2. an X-ray detector;
3. a bracket;
4. a weighing instrument;
5. an upper belt;
6. a lower belt;
7. an X-ray tube;
8. a protective sleeve;
9. a ray window.
Specific embodiments of the present disclosure have been shown by way of the above drawings and will be described in more detail below. These drawings and the written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the disclosed concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus consistent with some aspects of the disclosure as detailed in the accompanying claims.
The terms "comprising" and "having" and any variations thereof in the description and claims of the invention and in the drawings are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
In the existing weighing mode in the coal production link, an electronic belt scale installed on a belt conveyor generally adopts contact weighing, and the metering error is influenced by belt tension change and is not suitable for being used in places with large belt tension change; or using isotope nucleon scales, i.e. measuring material versus isotope 137 Cs releases the attenuation of gamma rays to weigh the materials conveyed by the conveyor, and the materials are weighed in a non-contact manner, so that the metering error is not influenced by the tension change of the belt, but the problem of radiation residue exists.
The inventors have studied the replacement of the X-ray source in the course of implementing the present invention 137 And the influence on the metering performance of the nucleon scale after the Cs isotope source. Combining the differences between X-rays and isotope gamma rays, it is proposed to use an X-ray detector to monitor X-ray energy (i.e.)Tube voltage) and intensity (i.e., tube current), the tube voltage and tube current of the X-ray source are controlled by feedback to keep the X-ray parameters constant, and the concept of a 'source strong zero point' of the X-ray source is provided, and the 'source strong zero point' of the X-ray source is controlled by monitoring the 'measurement zero point' of the X-ray nucleon scale, so as to realize the stability of the measurement zero point of the X-ray nucleon scale.
FIG. 1 is a schematic diagram of an embodiment of an X-ray nuclear scale according to the present invention. As shown in fig. 1, the X-ray nucleon balance provided in this embodiment includes:
an X-ray source 1, an X-ray detector 2, a bracket 3 and a weighing instrument 4;
wherein the X-ray source 1 is arranged at one end of the bracket 2; the other end of the bracket 3 is arranged on the X-ray detector 2; a belt for conveying the tested materials is arranged between the X-ray source 1 and the X-ray detector 2;
the X-ray detector 2 is connected with the weighing instrument 4;
the weighing instrument 4 is used for determining the load of the tested material according to the X-ray intensity information sent by the X-ray detector;
the weighing instrument 4 is further configured to determine an offset of the tube voltage and the tube current parameter according to the X-ray energy and the intensity output by the X-ray detector 2 and the tube voltage and the tube current parameter sent by the X-ray source 1, and send the offset to the X-ray source;
the X-ray source 1 is used for adjusting the tube voltage and tube current parameters according to the offset of the tube voltage and tube current parameters.
As shown in fig. 2, the method of the present embodiment is applied to the X-ray nucleon balance shown in fig. 1, and includes the following steps:
step 201, the weighing instrument acquires the energy and intensity of the X-ray output by the X-ray detector, and acquires the tube voltage parameter and the tube current parameter sent by the X-ray source;
step 202, the weighing instrument respectively determines the offset of the tube voltage parameter and the offset of the tube current parameter according to the X-ray energy and intensity, the tube voltage parameter and the tube current parameter, and sends the offset and the offset to the X-ray source;
step 203, the X-ray source adjusts the tube voltage parameter and the tube current parameter according to the offset of the tube voltage parameter and the offset of the tube current parameter.
Specifically, as shown in fig. 1, an X-ray source 1 and an X-ray detector 2 are disposed at two ends of a support 3, and the X-ray source is used for generating X-rays with a certain energy and stable intensity, namely emitting the X-rays; an X-ray detector for detecting the energy and intensity of the X-rays remaining after passing through the material.
An upper belt 5 for conveying the tested materials is arranged between the X-ray source 1 and the X-ray detector 3, and in other embodiments, the positions of the X-ray source 1 and the X-ray detector 3 can be interchanged, that is, the X-ray source 1 is arranged between the upper belt 5 and the lower belt 6, and the X-ray detector 3 is arranged above the bracket, which is not limited by the embodiment of the invention.
The weighing instrument 4 and the X-ray detector 3 can be connected through a wire or wireless communication, and the weighing instrument is used for determining the load of the tested material according to the X-ray intensity information sent by the X-ray detector.
When passing through the material, a part of the X-rays are absorbed by the material, and the unabsorbed X-rays penetrate through the material and reach the X-ray detector. The intensity of the X-rays after penetrating the material decays exponentially according to the following formula (1):
N＝N 0 e -μF/S ……………………………………(1)
wherein: mu represents the mass absorption coefficient of the material; f represents the material load of the conveyor; s represents the width of the conveyor belt; n (N) 0 Representing the X-ray intensity at the X-ray detector when no material exists; n represents the X-ray intensity at the X-ray detector in the presence of material.
The X-ray detector has 2 roles: 1) Monitoring the energy and intensity of the X-rays, feeding back instantaneous values of tube voltage and tube current parameters of the X-ray source to a weighing instrument, and keeping the energy and intensity of the X-rays constant; 2) As a material load detection sensor on the conveyor.
Specifically, in order to keep the energy and intensity of the X-ray nucleon balance constant, in the embodiment of the present invention, the weighing instrument acquires the energy and intensity of the X-ray detector (i.e., instantaneous values of tube voltage and tube current parameters), and tube voltage parameters and tube current parameters sent by the X-ray source, and determines the offset of the tube voltage parameters and the offset of the tube current parameters according to the energy and intensity of the X-ray and the tube voltage parameters and the tube current parameters, respectively, and sends the offset and the offset to the X-ray source, so that the X-ray source adjusts the tube voltage parameters and the tube current parameters according to the offset of the tube voltage parameters and the offset of the tube current parameters, thereby increasing the stability of the X-ray energy and intensity output by the X-ray source and improving the stability of the measurement of the X-ray nucleon balance.
As shown in fig. 3, optionally, the X-ray source includes:
an X-ray tube, a high voltage power supply module, a low voltage power supply module, and a high voltage power supply control module;
the X-ray tube is electrically connected with the high-voltage power supply module and the low-voltage power supply module respectively;
the high-voltage power supply module is electrically connected with the high-voltage power supply control module;
the X-ray source is connected with the weighing instrument through wireless communication;
the X-ray detector is connected with the weighing instrument through wireless communication;
the high-voltage power supply control module is specifically used for adjusting the tube voltage and tube current parameters according to the offset of the tube voltage and tube current parameters.
In order to overcome the influence of the change of the X-ray intensity on the metering stability of the X-ray nucleon balance, the high-voltage power supply control module of the X-ray source can be utilized to share the data of the high-voltage power supply of the X-ray source with the weighing instrument through a network so as to monitor the change of the X-ray intensity.
The weighing instrument can realize the following functions: 1) Receiving output signals of an X-ray detector, namely X-ray intensity information, transmission speed of a conveyor, X-ray energy and intensity of an X-ray source (namely instantaneous values of tube voltage and tube current parameters), and receiving the tube voltage parameters and the tube current parameters sent by the X-ray source; 2) Calculating the load, flow and shift output of materials on a conveyor, and the offset of tube current and tube voltage parameters; 3) The zero voltage value (a representation of intensity information), the instantaneous value of the X-ray energy and intensity, the tube current, and the offset of the tube voltage parameters of the X-ray nucleon balance are sent to the X-ray source via a wireless or wired network.
Because the distribution of the X-ray energy is continuous, the attenuation coefficient when the X-ray energy interacts with the substance is a variable of wavelength, and in order to improve the weighing precision and linearity of the X-ray nucleon scale, the metering state and the X-ray parameters of the X-ray nucleon scale need to be tracked in real time, so that the stability and precision of the X-ray nucleon scale are greatly improved.
The stability of an X-ray nucleon balance is determined by the stability of the X-ray source, and relates to the energy and intensity of the X-rays. The tube voltage of the X-ray source determines the X-ray energy and the tube current determines the X-ray intensity.
The high-voltage power control module in the X-ray source can be utilized, the X-ray detector is used as a feedback sensor for monitoring the energy and the intensity of X-rays, and the constant of the X-ray parameters is kept through feedback control, so that the energy and the intensity of the X-rays are kept constant. The principle is as follows:
after the X-ray source transmits power, the high-voltage power supply control module is realized by controlling the high-voltage power supply module:
1) Automatically adjusting the current and the voltage of an X-ray tube according to the set X-ray source parameters (tube current and tube voltage parameters), and ensuring that the energy and the intensity of the X-rays are not influenced by the fluctuation of a power supply voltage;
2) The weighing instrument receives instantaneous values of X-ray parameters detected by the X-ray detector through a wireless network, namely X-ray energy and intensity, compares the instantaneous values of tube current and tube voltage parameters with preset tube current and tube voltage parameters (namely tube voltage parameters and tube current parameters sent by an X-ray source), determines offset, adjusts the values of the tube voltage and tube current parameters to keep the stability of the X-ray parameters, and overcomes the reduction of X-ray intensity caused by the aging of an X-ray tube.
In the above embodiment, the stability of the X-ray nucleon balance is greatly improved by tracking the parameters of the X-rays of the X-ray nucleon balance in real time and adjusting the parameters of the tube voltage and the tube current.
Optionally, the bracket comprises:
a top plate, side plates and a bottom plate;
wherein, a closed space is enclosed among the top plate, the side plates and the bottom plate;
the top plate and the bottom plate are respectively provided with an opening for transmitting X rays.
Specifically, an opening is formed in the top plate for transmitting the X-rays emitted by the X-ray source.
An opening is provided in the base plate for transmitting the X-rays remaining after passing through the material.
According to the calibration method provided by the embodiment, the X-ray detector is used as a feedback sensor for monitoring the energy and the intensity of the X-rays, the tube voltage and the tube current of the X-ray source are controlled by feedback to keep the X-ray parameters of the X-ray source constant, the measurement stability of the X-ray nucleon balance is improved, and the isotope is replaced by the X-ray source 137 The X-ray nucleon balance made of the Cs source has no X-ray generation after the alternating current power supply of the X-ray source is turned off, no radiation residue problem exists, the problem of waste source treatment is not needed to be considered, and the environmental impact is small.
On the basis of the above embodiment, optionally, in order to improve the zero point stability of the X-ray nucleon balance, the method further comprises the following steps:
the weighing instrument acquires an X-ray intensity sampling value of the X-ray detector in a calibration period when the belt runs empty;
the weighing instrument determines a measurement zero point of the X-ray nucleon scale according to the X-ray intensity sampling value; and the measurement zero point is X-ray intensity information output by the X-ray detector when the belt runs empty.
Further, the method can also comprise the following steps:
the weighing instrument respectively acquires a tube voltage parameter sampling value and a tube current parameter sampling value of the X-ray source in a calibration period when the belt runs empty;
determining a source intensity zero point corresponding to the metering zero point according to the metering zero point, the tube voltage parameter sampling value and the tube current parameter sampling value; the source strong zero point is a tube voltage parameter and a tube current parameter corresponding to the metering zero point.
Specifically, the measurement zero point is a reference of the measurement of the X-ray nucleon scale, and is an average value of the X-ray dosage rate received by the X-ray detector when no material exists on the conveyor belt and the conveyor belt runs for one circle. The measurement zero point is commonly influenced by factors such as the consistency of X-ray energy, intensity and material of the conveyor belt. The stability of the measurement zero point determines the stability of the measurement of the X-ray nucleon balance, and the measurement zero point and the source strong zero point of the X-ray source are provided for the first time, and the stability of the measurement of the X-ray nucleon balance is realized by monitoring the measurement zero point of the X-ray and the source strong zero point of the X-ray source. The principle is as follows:
during the metering process of an X-ray nucleon balance, the source intensity of the X-ray source is zero (tube voltage U 0i Tube current I 0i ) The energy and intensity of the X-ray can be changed due to the change of the X-ray, and the stability of the output value of the X-ray detector can be influenced by factors such as belt deflection, belt abrasion and the like. In order to obtain a stable weighing zero point of the belt scale, it is important to eliminate the influence of the X-ray change on the weighing zero point.
1) Determining 'measurement zero point-source strong zero point'
After the X-ray source alternating current power supply is switched on and the X-ray is stabilized, a conveyor is started to enable the belt to run idle, and signals S of the X-ray detector acquired in a calibration period (T) of belt running are recorded by a weighing instrument respectively 0i Tube voltage U of X-ray source 0i Sum tube current I 0i ：
Wherein: s is S 0 、U 0 、I 0 Respectively representing the metering zero point and the corresponding source strong zero point (tube voltage and tube current) of the nucleon balance;
S 0i 、U 0i 、I 0i the value of the ith sampling signal representing the metering zero point and the corresponding source intensity zero point of the nucleon balance;
n represents the number of sampling signal points in the calibration period;
t represents a calibration period;
f s representing the signal sampling frequency of the meter.
We measure the signal S of the X-ray detector when the belt is running empty 0i The "measurement zero point" of the X-ray nucleon balance is called, and the tube voltage U of the X-ray source corresponds to the moment of the "measurement zero point" 0i Tube current I 0i Known as the "source intensity zero" of the X-ray source. The high-voltage power supply control module sends the value of the 'source strong zero point' of the X-ray source to the weighing instrument through a wireless or wired network, and the weighing instrument feeds back the 'metering zero point' to the high-voltage power supply control module through the wireless network. The weighing instrument and the high-voltage power supply control module are simultaneously built with a metering zero-source strong zero array (S) 0i 、U 0i 、I 0i )。
Further, the method further comprises:
the weighing instrument determines whether the source intensity zero point belongs to a preset source intensity zero point range;
if the source intensity zero point does not belong to the preset source intensity zero point range, the weighing instrument determines the offset of the tube voltage parameter and the offset of the tube current parameter, and sends the offset of the tube voltage parameter and the offset of the tube current parameter to the X-ray source so that the X-ray source can adjust the tube voltage parameter and the tube current parameter.
Specifically, when the conveyor runs in the air, the weighing instrument acquires the signal S of the X-ray detector in real time i Comparing with zero values stored in a balance 'measurement zero point-source strong zero point' array:
1) Signal S of X-ray detector i Value and "metering zero" S 0i The error of the values being within tolerance, i.e. the signal S of the X-ray detector i The value is at the metering zero point S 0i The preset range of values is: if the tube voltage U of the X-ray source i Value, tube current I i Value and "source strong zero point" U 0i Value, I 0i The error of the value is within the tolerance, so that the zero point of the X-ray energy spectrum and the zero point of the belt scale are not changed, and the zero point of the X-ray nucleon scale is stable; if the tube voltage U of the X-ray source i Value, tube current I i Value and "source strong zero point" U 0i Value, I 0i If the error of the value exceeds the preset range, the 'intensity zero' of the X-ray source is influenced by the working conditions such as aging of the ray tube, the 'source intensity zero' needs to be measured again, and the 'source intensity zero' which is measured newly is stored in the 'metering zero-source intensity zero' array.
2) Signal S of X-ray detector i Value and "metering zero" S 0i The error in the values exceeds a preset range: if the tube voltage U of the X-ray source i Value, tube current I i Value and "source strong zero point" U 0i Value, I 0i The error of the values being within tolerance, i.e. the tube voltage U i Value, tube current I i The value is at "source strong zero point" U 0i Value, I 0i Within a preset range of values, the zero point of the X-ray nucleon balance is influenced by the working condition of the conveyor to generate deviation, the measurement zero point is required to be measured again, and the newly measured measurement zero point is stored in a measurement zero point-source strong zero point array; if the tube voltage U of the X-ray source i Value, tube current I i Value and "source strong zero point" U 0i Value, I 0i If the error of the value exceeds the preset range, the tube voltage and tube current parameters of the X-ray are indicated to deviate, the weighing instrument determines the variation of the source intensity and feeds the variation back to the high-voltage power supply control module, the tube voltage and tube current parameters of the X-ray source are adjusted, and the X-ray is keptStability, the stability of the metering zero point is ensured.
In the specific embodiment, the stability and the precision of the X-ray nucleon scale are greatly improved by tracking the metering state and the X-ray parameters of the X-ray nucleon scale in real time.
Optionally, the method further comprises:
the X-ray source shields X-rays of less than a preset energy value before emitting the X-rays.
As shown in fig. 4, the X-ray tube 7 is disposed in a protective sleeve 8;
the protective sleeve 8 is provided with a radiation window 9 for emitting X-rays.
Specifically, electrons are generated after the cathode filament of the X-ray tube 7 is heated, and the electrons fly to the anode under the acceleration action of the high-voltage electric field; the high-speed moving electrons strike the anode target surface to generate X-rays. The magnitude of the X-ray tube voltage determines the magnitude of the high voltage electric field accelerating the electrons and determines the energy E of the X-rays. Intensity of X-ray I Connected with The magnitude of (2) is proportional to the tube current i and the atomic number Z of the anode target material, and the square of the tube voltage U is proportional to the square of the tube voltage U, namely: i Connected with ＝k 1 iU 2 Z(k 1 Is constant and is about 1.1X10 -19 ～1.4×10 -19 )。
Optionally, in order to eliminate the influence of the X-ray hardening on the linearity of the measurement, a shielding structure is arranged at the ray window for shielding the X-rays smaller than a preset energy value.
Specifically, since the X-rays contain a series of electromagnetic waves λ of different wavelengths, the absorption coefficient μ of the same substance for the X-rays is a cubic function of the wavelengths of the contained electromagnetic waves, and is a variable. When the X-ray penetrates through the absorber with different thickness, the low-energy particles with long wavelength are absorbed by the substance along with the increase of the thickness of the absorber, the total intensity of the X-ray after the high-energy particles with short wavelength penetrate through the substance is reduced, the ratio of the high-energy particles with short wavelength is increased, and the phenomenon of hardening appears in the energy spectrum of the X-ray after transmission compared with the energy spectrum before transmission.
By adding a shielding structure such as a selective shielding material in the ray window, for example, a shielding material with the thickness of 4mm can be added, the X-rays with the energy less than 60keV can be shielded, the hardening degree of an X-ray energy spectrum is reduced, and the influence of X-ray hardening on the measurement linearity is eliminated.
In practical application, the thickness range of the shielding material can be 4-5mm.
In the specific embodiment, the selective shielding material is additionally arranged on the ray window, so that the hardening degree of the X-ray energy spectrum is reduced, and the influence of the X-ray hardening on the measurement linearity is eliminated.
As shown in fig. 1 and 3, an embodiment of the present invention further provides an X-ray nucleon balance, including:
an X-ray source, an X-ray detector, a bracket and a weighing instrument;
wherein the X-ray source is arranged at one end of the bracket; the other end of the bracket is arranged on the X-ray detector; a belt for conveying the tested materials is arranged between the X-ray source and the X-ray detector;
the X-ray detector is connected with the weighing instrument;
the weighing instrument is used for determining the offset of the tube voltage and the tube current parameters according to the X-ray energy and the intensity output by the X-ray detector and the tube voltage and the tube current parameters sent by the X-ray source and sending the offset to the X-ray source;
the X-ray source is used for adjusting the tube voltage and tube current parameters according to the offset of the tube voltage and tube current parameters.
Optionally, the weighing instrument is further used for collecting an X-ray intensity sampling value of the X-ray detector in a calibration period when the belt runs empty; determining a measurement zero point of the X-ray detector according to the X-ray intensity sampling value; the measurement zero point is the intensity information output by the X-ray detector when the belt runs empty.
Optionally, the weighing instrument is further configured to collect a tube voltage parameter sampling value and a tube current parameter sampling value of the X-ray source in a calibration period when the belt runs empty respectively; determining a source intensity zero point corresponding to the metering zero point according to the metering zero point, the tube voltage parameter sampling value and the tube current parameter sampling value; the source strong zero point is a tube voltage and tube current parameter corresponding to the metering zero point.
Optionally, the weighing instrument is specifically configured to determine whether the source intensity zero point belongs to a preset source intensity zero point range;
if the source strong zero point does not belong to the preset source strong zero point range, determining the offset of the tube voltage parameter and the offset of the tube current parameter, and sending the offset of the tube voltage parameter and the offset of the tube current parameter to the high-voltage power supply control module so that the high-voltage power supply control module can adjust the tube voltage parameter and the tube current parameter.
Optionally, the method further comprises:
the speed measuring assembly is connected with the weighing instrument; the speed measuring assembly is arranged on the conveyor of the belt and used for measuring the conveying speed of the conveyor.
Specifically, the speed measuring component can be a speed sensor, the conveying speed of the conveyor is measured, and the conveying speed is fed back to the weighing instrument, and the weighing instrument can be used for calculating data such as flow, shift yield and the like.
The nucleon balance in the above embodiment has similar technical effects and technical effects to those of the method embodiment, and will not be described herein.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (6)
1. A method of calibrating an X-ray nuclear scale, applied to an X-ray nuclear scale, the X-ray nuclear scale comprising: an X-ray source, an X-ray detector, a bracket and a weighing instrument; wherein the X-ray source is arranged at one end of the bracket; the other end of the bracket is arranged on the X-ray detector; a belt for conveying the tested materials is arranged between the X-ray source and the X-ray detector; the X-ray detector is connected with the weighing instrument; the method comprises the following steps:
the weighing instrument acquires the energy and intensity of the X-rays output by the X-ray detector, and acquires the tube voltage parameter and the tube current parameter sent by the X-ray source;
the weighing instrument respectively determines the offset of the tube voltage parameter and the offset of the tube current parameter according to the X-ray energy and intensity, the tube voltage parameter and the tube current parameter, and sends the offset and the offset to the X-ray source;
the X-ray source adjusts the tube voltage parameter and the tube current parameter according to the offset of the tube voltage parameter and the offset of the tube current parameter;
the method further comprises the steps of:
the weighing instrument acquires an X-ray intensity sampling value of the X-ray detector in a calibration period when the belt runs empty;
the weighing instrument determines a measurement zero point of the X-ray nucleon scale according to the X-ray intensity sampling value; the measurement zero point is X-ray intensity information output by the X-ray detector when the belt runs empty;
the weighing instrument respectively acquires a tube voltage parameter sampling value and a tube current parameter sampling value of the X-ray source in a calibration period when the belt runs empty;
determining a source intensity zero point corresponding to the metering zero point according to the metering zero point, the tube voltage parameter sampling value and the tube current parameter sampling value; the source strong zero point is a tube voltage parameter and a tube current parameter corresponding to the metering zero point.
2. The method as recited in claim 1, further comprising:
the weighing instrument determines whether the source intensity zero point belongs to a preset source intensity zero point range;
if the source intensity zero point does not belong to the preset source intensity zero point range, the weighing instrument determines the offset of the tube voltage parameter and the offset of the tube current parameter, and sends the offset of the tube voltage parameter and the offset of the tube current parameter to the X-ray source so that the X-ray source can adjust the tube voltage parameter and the tube current parameter.
3. The method as recited in claim 1, further comprising:
the X-ray source shields X-rays of less than a preset energy value before emitting the X-rays.
4. An X-ray nuclear scale, comprising:
an X-ray source, an X-ray detector, a bracket and a weighing instrument;
wherein the X-ray source is arranged at one end of the bracket; the other end of the bracket is arranged on the X-ray detector; a belt for conveying the tested materials is arranged between the X-ray source and the X-ray detector;
the X-ray detector is connected with the weighing instrument;
the weighing instrument is used for determining the offset of the tube voltage and the tube current parameters according to the energy and the intensity of the X-ray output by the X-ray detector and acquiring the tube voltage and the tube current parameters sent by the X-ray source and sending the offset to the X-ray source;
the X-ray source is used for adjusting the tube voltage and tube current parameters according to the offset of the tube voltage and tube current parameters;
the X-ray source comprises:
an X-ray tube, a high voltage power supply module, a low voltage power supply module, and a high voltage power supply control module;
the X-ray tube is electrically connected with the high-voltage power supply module and the low-voltage power supply module respectively;
the high-voltage power supply module is electrically connected with the high-voltage power supply control module;
the X-ray source is connected with the weighing instrument through wireless communication;
the X-ray detector is connected with the weighing instrument through wireless communication;
the high-voltage power supply control module is specifically used for adjusting the tube voltage and tube current parameters according to the offset of the tube voltage and tube current parameters;
the weighing instrument is also used for collecting an X-ray intensity sampling value of the X-ray detector in a calibration period when the belt runs empty; determining a measurement zero point of the X-ray detector according to the X-ray intensity sampling value; the measurement zero point is the intensity information output by the X-ray detector when the belt runs empty;
the weighing instrument is also used for respectively collecting a tube voltage parameter sampling value and a tube current parameter sampling value of the X-ray source in a calibration period when the belt runs empty; determining a source intensity zero point corresponding to the metering zero point according to the metering zero point, the tube voltage parameter sampling value and the tube current parameter sampling value; the source strong zero point is a tube voltage and tube current parameter corresponding to the metering zero point.
5. The nucleon balance of claim 4, wherein said weighing instrument is specifically configured to determine whether said source intensity zero point falls within a predetermined source intensity zero point range;
if the source strong zero point does not belong to the preset source strong zero point range, determining the offset of the tube voltage parameter and the offset of the tube current parameter, and sending the offset of the tube voltage parameter and the offset of the tube current parameter to the high-voltage power supply control module so that the high-voltage power supply control module can adjust the tube voltage parameter and the tube current parameter.
6. The nucleon balance of claim 4 wherein the balance comprises a plurality of support arms,
the X-ray tube is arranged in the protective sleeve;
the protective sleeve is provided with a ray window for emitting X rays;
and a shielding material is arranged at the ray window and used for shielding X rays with energy values smaller than the preset energy value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810017206.3A CN108051069B (en) | 2018-01-09 | 2018-01-09 | Calibration method of X-ray nucleon balance and X-ray nucleon balance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810017206.3A CN108051069B (en) | 2018-01-09 | 2018-01-09 | Calibration method of X-ray nucleon balance and X-ray nucleon balance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108051069A CN108051069A (en) | 2018-05-18 |
| CN108051069B true CN108051069B (en) | 2023-11-21 |
Family
ID=62126208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810017206.3A Active CN108051069B (en) | 2018-01-09 | 2018-01-09 | Calibration method of X-ray nucleon balance and X-ray nucleon balance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108051069B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108239B (en) * | 2019-05-21 | 2021-04-02 | 东莞维科电池有限公司 | Pole piece quality information acquisition method, system and equipment |
| CN111239171A (en) * | 2020-02-13 | 2020-06-05 | 雅化锂业(雅安)有限公司 | Weighing method capable of judging materials for metallurgy |
| DE102020133594A1 (en) | 2020-12-15 | 2022-06-15 | Vega Grieshaber Kg | Radiometric measuring device for determining a mass flow |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037587A (en) * | 1988-05-13 | 1989-11-29 | 清华大学 | A kind of ray Weighing method and uclear scale |
| CN1055994A (en) * | 1991-04-25 | 1991-11-06 | 清华大学 | The conveyer-belt nucleon weigher of low-radiation high-stability |
| CN2125132U (en) * | 1992-06-26 | 1992-12-16 | 四○四厂石家庄辐射技术开发中心 | Intelligence scintilation nuclear scale |
| CN1068651A (en) * | 1992-06-26 | 1993-02-03 | 中国核工业总公司四○四厂石家庄辐射技术开发中心 | Intelligence twinkle nucleon balance |
| CN1078046A (en) * | 1992-04-22 | 1993-11-03 | 兰州大学 | Scintillator type nucleon weighing apparatus |
| CN1248697A (en) * | 1999-08-10 | 2000-03-29 | 邸生才 | Material high-precision weighing method and nucleon balance made by said method |
| WO2001011324A1 (en) * | 1999-08-10 | 2001-02-15 | Shengcai Di | A method for precisely measuring the weight of mass material and a nucleonic weigher employing this method |
| CN2537002Y (en) * | 2001-11-23 | 2003-02-19 | 北京中乾机电设备有限责任公司 | Nucleon balancer online metering device |
| CN1419109A (en) * | 2002-07-02 | 2003-05-21 | 北京清大科技股份有限公司 | Full matched method for raising nucleon balance accuracy and nucleon balance made by using method |
| CN1456868A (en) * | 2003-03-19 | 2003-11-19 | 北京金日新事业技术有限公司 | Core belt scaler for reducing measuring errors caused by irregular piling up |
| CN2594774Y (en) * | 2002-07-02 | 2003-12-24 | 北京清大科技股份有限公司 | High-precision matched nuclear balancer |
| CN1479564A (en) * | 2002-06-25 | 2004-03-03 | Circuit device and method for generating x-ray tube voltage | |
| CN101529995A (en) * | 2006-10-25 | 2009-09-09 | 株式会社日立医药 | X-ray generator |
| CN102095481A (en) * | 2010-12-02 | 2011-06-15 | 江苏大学 | Device and method for automatically discriminating cocoon sexuality |
| CN202066969U (en) * | 2010-12-31 | 2011-12-07 | 北京卫金帆医学技术发展有限公司 | X-ray dosage calculation and display system based on X-ray meter |
| CN103026214A (en) * | 2010-02-26 | 2013-04-03 | 拉皮斯坎系统股份有限公司 | Integrated portable checkpoint system |
| CN104039230A (en) * | 2012-09-26 | 2014-09-10 | 株式会社东芝 | X-ray ct device |
-
2018
- 2018-01-09 CN CN201810017206.3A patent/CN108051069B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037587A (en) * | 1988-05-13 | 1989-11-29 | 清华大学 | A kind of ray Weighing method and uclear scale |
| CN1055994A (en) * | 1991-04-25 | 1991-11-06 | 清华大学 | The conveyer-belt nucleon weigher of low-radiation high-stability |
| CN1078046A (en) * | 1992-04-22 | 1993-11-03 | 兰州大学 | Scintillator type nucleon weighing apparatus |
| CN2125132U (en) * | 1992-06-26 | 1992-12-16 | 四○四厂石家庄辐射技术开发中心 | Intelligence scintilation nuclear scale |
| CN1068651A (en) * | 1992-06-26 | 1993-02-03 | 中国核工业总公司四○四厂石家庄辐射技术开发中心 | Intelligence twinkle nucleon balance |
| CN1248697A (en) * | 1999-08-10 | 2000-03-29 | 邸生才 | Material high-precision weighing method and nucleon balance made by said method |
| WO2001011324A1 (en) * | 1999-08-10 | 2001-02-15 | Shengcai Di | A method for precisely measuring the weight of mass material and a nucleonic weigher employing this method |
| CN2537002Y (en) * | 2001-11-23 | 2003-02-19 | 北京中乾机电设备有限责任公司 | Nucleon balancer online metering device |
| CN1479564A (en) * | 2002-06-25 | 2004-03-03 | Circuit device and method for generating x-ray tube voltage | |
| CN1419109A (en) * | 2002-07-02 | 2003-05-21 | 北京清大科技股份有限公司 | Full matched method for raising nucleon balance accuracy and nucleon balance made by using method |
| CN2594774Y (en) * | 2002-07-02 | 2003-12-24 | 北京清大科技股份有限公司 | High-precision matched nuclear balancer |
| CN1456868A (en) * | 2003-03-19 | 2003-11-19 | 北京金日新事业技术有限公司 | Core belt scaler for reducing measuring errors caused by irregular piling up |
| CN101529995A (en) * | 2006-10-25 | 2009-09-09 | 株式会社日立医药 | X-ray generator |
| CN103026214A (en) * | 2010-02-26 | 2013-04-03 | 拉皮斯坎系统股份有限公司 | Integrated portable checkpoint system |
| CN102095481A (en) * | 2010-12-02 | 2011-06-15 | 江苏大学 | Device and method for automatically discriminating cocoon sexuality |
| CN202066969U (en) * | 2010-12-31 | 2011-12-07 | 北京卫金帆医学技术发展有限公司 | X-ray dosage calculation and display system based on X-ray meter |
| CN104039230A (en) * | 2012-09-26 | 2014-09-10 | 株式会社东芝 | X-ray ct device |
Non-Patent Citations (3)
| Title |
|---|
| X射线称重原理与实现方法;田冰;《上海电气技术》;第53-58页 * |
| 凸度仪X光机参数设置有效性的实验验证;张玉爱;吴志芳;苗积臣;邢桂来;李立涛;;原子能科学技术(第09期);全文 * |
| 核子秤非实物标定方法的研究;钟传杰，方元青，景亚霓，柳昌庆;计量技术(第08期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108051069A (en) | 2018-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108051069B (en) | Calibration method of X-ray nucleon balance and X-ray nucleon balance | |
| SU852185A3 (en) | Method of determining coal ash content | |
| US3278747A (en) | Method and apparatus for continuously weighing material on a conveyor comprising a radioactive source and detector | |
| CN103376267B (en) | A kind of ash content on-line measurement system and ash content on-line control system and method thereof | |
| US20170184737A1 (en) | Reference detector for correcting fluctuations in dose and energy of x-ray sources | |
| US6438189B1 (en) | Pulsed neutron elemental on-line material analyzer | |
| CN1967222B (en) | X-ray cut tobacco fill value measuring method and device therefor | |
| JP6426210B2 (en) | Method for measuring the safety level of bulk material | |
| CN102538923A (en) | Continuous measuring electronic belt scale | |
| CN102269718B (en) | X-ray ash content measurement device and method | |
| JPH028653B2 (en) | ||
| US4359639A (en) | Method of and apparatus for determining the nature of transported material | |
| US3955087A (en) | Apparatus for measuring moisture in moving bulk material using a lithium-7 radiation source | |
| US3541332A (en) | Method and apparatus for measuring the weight of a load on a conveyor belt | |
| CN2847241Y (en) | X-ray online weight meter | |
| CN207964033U (en) | X-ray uclear scale | |
| US7242747B2 (en) | Method for determining a gsm substance and/or a chemical composition of a conveyed material sample, and a device for this purpose | |
| CN2884191Y (en) | Equipment for measuring the volume of packing cut tobacco utilizing X rays | |
| CA1165018A (en) | Analysis of coal | |
| CA2703773C (en) | Device for the online determination of the contents of a substance, and method for using such a device | |
| CN108693551B (en) | Probe and device for monitoring grade of uranium ore | |
| CN1020165C (en) | Low-radiation high-stability conveyer-belt nucleon weigher | |
| FI83706B (en) | FOERFARANDE OCH ANORDNING FOER MAETNING AV PAPPERSFORMATION. | |
| CN220508713U (en) | Device for measuring true density of bulk material on line | |
| US3457413A (en) | Dose equivalent radiation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Wenqing Inventor after: Ren Fengguo Inventor after: Wang Huaiqun Inventor after: Tian Bailin Inventor after: Fan Lijun Inventor after: Li Ping Inventor after: Zhang Zhonghua Inventor after: Ren Anxiang Inventor after: Hou Shiliang Inventor before: Wang Wenqing Inventor before: Ren Fengguo Inventor before: Wang Huaiqun Inventor before: Tian Bailin Inventor before: Fan Lijun Inventor before: Li Ping Inventor before: Zhang Zhonghua Inventor before: Ren Anxiang Inventor before: Hou Shiliang |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |