CN108051069B - Calibration method of X-ray nuclear scale and X-ray nuclear scale - Google Patents

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

Calibration method of X-ray nuclear scale and X-ray nuclear scale

Technical field

The present invention relates to the technical field of weighing, and in particular to a calibration method of an X-ray nuclear scale and an X-ray nuclear scale.

Background technique

Coal has always occupied a dominant position in my country's energy industry structure. In order to improve economic efficiency and strengthen the supervision of coal production links, coal mining enterprises generally install isotope nuclear scales on the trough belts of mining working faces to monitor the raw coal recovery rate in the mining area in real time to ensure the effective recovery of coal resources.

The coal mining process of the coal mine working face adopts the "backward method" coal mining. The belt conveyor of the underground mining working face will shorten as the coal mining working face advances, causing changes in the belt tension. The isotope nucleon scale installed on the belt conveyor adopts "non-contact" weighing. The isotope nucleon scale measures the attenuation of the gamma rays released by the isotope ¹³⁷ Cs by the material to weigh the materials transported by the conveyor. The measurement error is not affected by the belt. The influence of tension changes is particularly suitable for measurement in coal mining belt environments and has been widely used. The monoenergetic γ-ray produced by the isotope ¹³⁷ Cs has a constant attenuation coefficient, high measurement accuracy and good linearity.

However, the radioactive isotope ¹³⁷ Cs used in the above-mentioned isotope nucleon scale has certain radiation residue problems.

Contents of the invention

The present invention provides a calibration method for an X-ray nuclear scale and an X-ray nuclear scale to solve the problem of certain radiation residues in the above-mentioned existing isotope nuclear scales.

In a first aspect, the present invention provides a calibration method for an X-ray nuclear scale, which is applied to an X-ray nuclear scale. The X-ray nuclear scale includes: an X-ray source, an X-ray detector, a bracket and a weighing instrument; wherein, The X-ray source is arranged on one end of the bracket; the other end of the bracket is arranged on the X-ray detector; a belt for transporting the material to be measured is arranged between the X-ray source and the X-ray detector. ; The X-ray detector is connected to the weighing instrument; the method includes:

The weighing instrument obtains the X-ray energy and intensity output by the X-ray detector, and obtains the tube voltage parameters and tube current parameters sent by the X-ray source;

The weighing instrument determines the offset of the tube voltage parameter and the offset of the tube current parameter based on the X-ray energy and intensity, as well as the tube voltage parameter and tube current parameter, respectively, and sends them 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 nuclear scale, including:

X-ray sources, X-ray detectors, supports and weighing instruments;

wherein the Material belt;

The X-ray detector is connected to the weighing instrument;

The weighing instrument is used to determine the bias of the tube voltage and tube current parameters based on the X-ray energy and intensity output by the X-ray detector and obtain the tube voltage and tube current parameters sent by the X-ray source. Move the amount and send it to the X-ray source;

The X-ray source is used to adjust 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 nuclear scale provided by the present invention uses an X-ray detector to double as a feedback sensor for monitoring X-ray energy and intensity, and maintains the X-ray parameters of the X-ray source through feedback control of the tube voltage and tube current of the X-ray source. Constant, which improves the measurement stability of the X-ray nuclear scale. Moreover, after turning off the AC power supply of the X-ray source, no X-rays are generated, there is no problem of radiation residue, and there is no need to consider the issue of waste source disposal, which has a small impact on the environment.

Description of the 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.

Figure 1 is a schematic structural diagram of an embodiment of an X-ray nuclear scale provided by the present invention;

Figure 2 is a schematic flow chart of an embodiment of the calibration method of an X-ray nuclear scale provided by the present invention;

Figure 3 is a schematic diagram of the X-ray source structure of an embodiment of the X-ray nuclear scale provided by the present invention;

Figure 4 is a schematic diagram of the X-ray source structure of another embodiment of the X-ray nuclear scale provided by the present invention.

Explanation of reference symbols:

1. X-ray source;

2. X-ray detector;

3. Bracket;

4. Weighing instrument;

5. Put on the belt;

6. Lower the belt;

7. X-ray tube;

8. Protective cover;

9. Ray window.

Specific embodiments of the present disclosure have been shown through the above-mentioned drawings and will be described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the present disclosure to those skilled in the art with reference to the specific embodiments.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of devices consistent with aspects of the disclosure as detailed in the appended claims.

The terms "including" and "having" and any variations thereof in the description and claims of the present invention and the accompanying drawings are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes Other steps or units inherent to such processes, methods, products or devices.

The existing weighing method in the coal production process is generally an electronic belt scale installed on a belt conveyor that uses contact weighing. The measurement error is affected by changes in belt tension and is not suitable for use in places with large changes in belt tension; or isotope nuclei are used. The scale measures the attenuation of gamma rays released by the isotope ¹³⁷ Cs to weigh the materials transported by the conveyor. It is a "non-contact" weighing. The measurement error is not affected by changes in belt tension, but there is radiation residue. question.

In the process of realizing the present invention, the inventor studied the impact on the measurement performance of the nuclear scale after replacing the ¹³⁷ Cs isotope source with an X-ray source. Based on the differences between X-rays and isotope γ-rays, it is proposed to use X-ray detectors as feedback sensors to monitor X-ray energy (i.e., tube voltage) and intensity (i.e., tube current). The tube voltage and intensity of the X-ray source can be controlled through feedback. The tube current is used to keep the X-ray parameters constant, and the concept of "source intensity zero point" of the X-ray source is proposed. By monitoring the "measurement zero point" of the X-ray nuclear scale, the "source intensity zero point" of the The stability of the zero point of nuclear scale measurement.

Figure 1 is a schematic structural diagram of an embodiment of an X-ray nuclear scale provided by the present invention. As shown in Figure 1, the X-ray nuclear scale provided by this embodiment includes:

X-ray source 1, X-ray detector 2, bracket 3 and weighing instrument 4;

Wherein, the X-ray source 1 is arranged on one end of the bracket 2; the other end of the bracket 3 is arranged on the X-ray detector 2; between the X-ray source 1 and the X-ray detector 2 There is a belt conveying the material to be measured;

The X-ray detector 2 is connected to the weighing instrument 4;

The weighing instrument 4 is used to determine the load of the material to be measured based on the X-ray intensity information sent by the X-ray detector;

The weighing instrument 4 is also used to determine the tube voltage and tube current based on the X-ray energy and intensity output by the X-ray detector 2 and the tube voltage and tube current parameters sent by the X-ray source 1 Parameter offset and sent to the X-ray source;

The X-ray source 1 is used to adjust the tube voltage and tube current parameters according to the offset of the tube voltage and tube current parameters.

As shown in Figure 2, the method of this embodiment is applied to the X-ray nuclear scale shown in Figure 1. The method includes the following steps:

Step 201: The weighing instrument acquires the X-ray energy and intensity output by the X-ray detector, and acquires the tube voltage parameters and tube current parameters sent by the X-ray source;

Step 202: The weighing instrument determines the offset of the tube voltage parameter and the offset of the tube current parameter based on the X-ray energy and intensity, as well as the tube voltage parameter and tube current parameter, respectively, and sent 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 Figure 1, the X-ray source 1 and the X-ray detector 2 are arranged at both ends of the bracket 3. The X-ray source is used to generate X-rays with a certain energy and stable intensity, that is, to emit X-rays; X-ray detection The detector is used to detect the energy and intensity of X-rays remaining after passing through the material.

An upper belt 5 for conveying the material to be measured is provided between the X-ray source 1 and the X-ray detector 3. In other embodiments, the positions of the X-ray source 1 and the X-ray detector 3 can also be interchanged, that is, The X-ray source 1 is disposed between the upper belt 5 and the lower belt 6, and the X-ray detector 3 is disposed above the bracket. The embodiment of the present invention is not limited to this.

The weighing instrument 4 and the X-ray detector 3 can be connected through a wired connection or a wireless communication connection. The weighing instrument is used to determine the intensity of the measured material based on the X-ray intensity information sent by the X-ray detector. load.

When X-rays pass through the material, part of them are absorbed by the material, and the unabsorbed X-rays penetrate the material and reach the X-ray detector. The intensity of X-rays after penetrating the material attenuates exponentially according to formula (1):

N＝N ₀ e ^-μF/S …………………………(1)

Among them: μ 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 ₀ represents the X-ray intensity at the X-ray detector when there is no material; N represents the X-ray detector at the time when there is material X-ray intensity.

The X-ray detector has two functions: 1) monitors the X-ray energy and intensity, feeds back the instantaneous values of the tube voltage and tube current parameters of the X-ray source to the weighing instrument, and keeps the X-ray energy and intensity constant; 2) serves as a transporter On-board material load detection sensor.

Specifically, in order to keep the energy and intensity of the X-rays of the X-ray nuclear scale constant, the weighing instrument in the embodiment of the present invention obtains the X-ray energy and intensity of the instantaneous value), as well as the tube voltage parameter and tube current parameter sent by the X-ray source, and based on the X-ray energy and intensity, and the tube voltage parameter and tube current parameter, the offset of the tube voltage parameter is determined respectively and the offset of the tube current parameter, and send them to the X-ray source, so that the X-ray source adjusts the The tube voltage parameters and tube current parameters increase the stability of the X-ray energy and intensity output by the X-ray source, and improve the stability of the X-ray nuclear scale measurement.

As shown in Figure 3, optionally, the X-ray source includes:

X-ray tube, high-voltage power supply module, low-voltage power supply module and high-voltage power supply control module;

Wherein, the X-ray tube is electrically connected to the high-voltage power supply module and the low-voltage power supply module respectively;

The high-voltage power supply module and the high-voltage power supply control module are electrically connected;

The X-ray source and the weighing instrument are connected through wireless communication;

The X-ray detector and the weighing instrument are connected through wireless communication;

The high-voltage power supply control module is specifically configured to adjust the tube voltage and tube current parameters according to the offset of the tube voltage and tube current parameters.

In order to overcome the impact of changes in X-ray intensity on the measurement stability of the X-ray nuclear scale, we can use the high-voltage power supply control module of the X-ray source to share the data of the high-voltage power supply of the X-ray source with the weighing instrument through the network to monitor changes in X-ray intensity .

The weighing instrument can realize the following functions: 1) Receive the output signal of the X-ray detector, that is, the X-ray intensity information, the transmission speed of the conveyor, the X-ray energy and intensity of the value), receive the tube voltage parameters and tube current parameters sent by the , sending the zero-point voltage value of the X-ray nuclear scale (a representation of intensity information), instantaneous values of X-ray energy and intensity, and offsets of tube current and tube voltage parameters to the X-ray source.

Since the distribution of X-ray energy is continuous, the attenuation coefficient when interacting with matter is a variable of wavelength. In order to improve the weighing accuracy and linearity of the X-ray nuclear scale, it is necessary to track the measurement status and X-ray of the X-ray nuclear scale in real time. The parameters of the ray greatly improve the stability and accuracy of the X-ray nuclear scale.

The stability of the X-ray nuclear scale is determined by the stability of the X-ray source, involving the energy and intensity of the X-ray. 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 supply control module in the X-ray source can be used to use the X-ray detector as a feedback sensor to monitor the energy and intensity of X-rays. Through feedback control, the X-ray parameters can be kept constant, thereby keeping the energy and intensity of the X-rays constant. The principle is as follows:

After the X-ray source is powered on, the high-voltage power supply control module controls the high-voltage power supply module to achieve:

1) Automatically adjust the X-ray tube current and tube voltage according to the set X-ray source parameters (tube current and tube voltage parameters) to ensure that the energy and intensity of X-rays are not affected by power supply voltage fluctuations;

2) The weighing instrument receives the instantaneous values of the X-ray parameters detected by the X-ray detector through the wireless network, that is, the X-ray energy and intensity. According to the instantaneous values of the tube current and tube voltage parameters and the preset tube current and tube voltage parameters, (i.e., the tube voltage parameters and tube current parameters sent by the X-ray source) are compared to determine the offset, adjust the values of the tube voltage and tube current parameters to maintain the stability of the Small.

In the above embodiment, by tracking the X-ray parameters of the X-ray nuclear scale in real time and adjusting the tube voltage and tube current parameters, the stability of the X-ray nuclear scale is greatly improved.

Optional, brackets include:

Top, side and bottom panels;

Wherein, a closed space is enclosed between the top plate, side plates and bottom plate;

The top plate and the bottom plate are respectively provided with an opening for transmitting X-rays.

Specifically, an opening is provided on the top plate for transmitting X-rays emitted by the X-ray source.

An opening is provided on the bottom plate for transmitting the remaining X-rays after passing through the material.

In the calibration method provided by this embodiment, the X-ray detector doubles as a feedback sensor for monitoring X-ray energy and intensity, and the X-ray parameters of the X-ray source are kept constant through feedback control of the tube voltage and tube current of the X-ray source, thereby improving It improves the measurement stability of the X-ray nuclear scale, and uses the X-ray source instead of the isotope ¹³⁷ Cs source. After the AC power supply of the X-ray source is turned off, no X-rays are generated, and there is no problem of residual radiation. There is no need to consider the issue of waste source disposal, and it has little impact on the environment.

Based on the above embodiment, optionally, in order to improve the zero point stability of the X-ray nuclear scale, the method further includes the following steps:

The weighing instrument collects the X-ray intensity sampling value of the X-ray detector within the calibration period when the belt is running without load;

The weighing instrument determines the measurement zero point of the X-ray nuclear scale based on the X-ray intensity sampling value; the measurement zero point is the X-ray intensity information output by the X-ray detector when the belt is running without load.

Further, the following steps may also be included:

The weighing instrument collects the tube voltage parameter sampling value and the tube current parameter sampling value of the X-ray source during the calibration period when the belt is running without load;

According to the metering zero point and the tube voltage parameter sampling value and tube current parameter sampling value, the source intensity zero point corresponding to the metering zero point is determined; the source intensity zero point is the tube voltage parameter and tube voltage parameter corresponding to the metering zero point. current parameters.

Specifically, the measurement zero point is the basis for measurement of the X-ray nuclear scale. It is the average value of the X-ray dose rate received by the X-ray detector when there is no material on the conveyor belt and it runs for one week. The measurement zero point is affected by factors such as X-ray energy, intensity and the consistency of the conveyor belt material. The stability of the measurement zero point determines the measurement stability of the X-ray nuclear scale. For the first time, we proposed the "measurement zero point" and the "source intensity zero point" of the X-ray source. By monitoring the X-ray measurement zero point and the X-ray source source intensity zero point, The stability of X-ray nuclear scale measurement is achieved. The principle is as follows:

During the measurement process of the X-ray nuclear scale, changes in the source intensity zero point of the X-ray source (tube voltage U _0i , tube current I _0i ) will cause changes in the energy and intensity of the to the stability of the X-ray detector output value. In order to obtain a stable measuring zero point of the belt scale, it is very important to eliminate the influence of X-ray changes on the measuring zero point.

1) Determine "measurement zero point - source intensity zero point"

Turn on the AC power supply of the X-ray source and wait for the X-rays to stabilize, then start the conveyor and let the belt run without load. The weighing instrument records the X-ray detector signals S _0i and Tube voltage U _0i and tube current I _0i of the X-ray source:

In the formula: S ₀ , U ₀ , I ₀ respectively represent the measurement zero point of the nuclear scale and the corresponding source intensity zero point (tube voltage, tube current);

S _0i , U _0i , and I _0i represent the value of the i-th sampling signal of the nuclear scale measurement zero point and the corresponding source intensity zero point;

n represents the number of sampling signal points within the calibration period;

T represents the calibration period;

f _s represents the signal sampling frequency of the meter.

We call the signal S _0i of the X-ray detector measured when the belt is running without load the "measurement zero point" of the X-ray nuclear scale. The tube voltage U _0i and tube current I of the X-ray source corresponding to the "measurement zero point" moment are _0i is called the "source intensity zero point" of the X-ray source. The high-voltage power supply control module sends the "source intensity zero point" value of the X-ray source to the weighing instrument through a wireless or wired network, and the weighing instrument also feeds back the "measurement zero point" to the high-voltage power supply control module through the wireless network. The "measurement zero point-source intensity zero point" array (S _0i , U _0i , I _0i ) of the X-ray nuclear scale is simultaneously established in the weighing instrument and high-voltage power supply control module.

Further, the method also includes:

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 sets the tube voltage parameter to The offset and the offset of the tube current parameter are sent to the X-ray source, so that the X-ray source adjusts the tube voltage parameter and the tube current parameter.

Specifically, when the conveyor is running empty, the weighing instrument collects the signal S _i of the X-ray detector in real time and compares it with the zero value saved in the "Measurement Zero Point - Source Strength Zero Point" array of the scale:

1) The error between the signal S _i value of the X-ray detector and the "measurement zero point" S _0i value is within the tolerance, that is, the signal S _i value of the X-ray detector is within the preset range of the measurement zero point "S _0i value: If The errors between the tube voltage U _i value and tube current I _i value of the X-ray source and the "source intensity zero point" U _0i value and I _0i value are also within the tolerance, then it can be confirmed that the zero point of the X-ray energy spectrum and the belt scale has not changed. , the zero point of the X-ray nuclear scale is stable; if the _error between the tube voltage U _i value and tube current I _{i value} of the The "zero intensity point" deviates due to working conditions such as the aging of the ray tube. It is necessary to re-measure the "zero point of source intensity" and save the newly measured "zero point of source intensity" to the "zero point of measurement - zero point of source intensity" array.

2) The error between the signal Si _value of the X-ray detector and the "measurement zero point" S _0i value exceeds the preset range: If the tube voltage U _i value and tube current I _i value of the X-ray source are different from the "source intensity zero point" U _0i The error of the value and I _0i value is within the tolerance, that is, the tube voltage U _i value and the tube current I _i value are within the preset range of the "source intensity zero point" U _0i value and I _0i value, then the zero point of the X-ray nuclear scale If there is a deviation due to the working conditions of the conveyor, it is necessary to re-measure the "Measurement Zero Point" and save the newly measured "Measurement Zero Point" to the "Measurement Zero Point - Source Strength Zero Point"array; if the tube voltage U _i value of the X-ray source , the error between the tube current I _i value and the "source intensity zero point" U _0i value and I _0i value exceeds the preset range, which means that the X-ray tube voltage and tube current parameters are offset, and the weighing instrument determines the change in source intensity. The quantity is fed back to the high-voltage power supply control module to adjust the tube voltage and tube current parameters of the X-ray source to maintain the stability of the X-ray and ensure the stability of the "measurement zero point".

In the above-mentioned specific embodiments, by tracking the measurement status of the X-ray nuclear scale and the X-ray parameters in real time, the stability and accuracy of the X-ray nuclear scale are greatly improved.

Optional, also includes:

The X-ray source shields X-rays that are less than a preset energy value before emitting X-rays.

As shown in Figure 4, the X-ray tube 7 is arranged in a protective cover 8;

The protective cover 8 is provided with a ray window 9 for emitting X-rays.

Specifically, the cathode filament of the X-ray tube 7 generates electrons after heating, and the electrons fly toward the anode under the acceleration of the high-voltage electric field; the high-speed moving electrons collide with the anode target surface to generate X-rays. The voltage of the X-ray tube determines the size of the high-voltage electric field that accelerates the electrons, and determines the energy E of the X-rays. The magnitude of the X-ray intensity I is _directly proportional to the tube current i and the atomic number Z of the anode target material, and is proportional to the square of the tube voltage U, that is: I ₌ k ₁ iU ² Z (k ₁ is a constant, approximately equal to 1.1× 10 ^-19 ~ 1.4×10 ^-19 ).

Optionally, in order to eliminate the impact of X-ray hardening on metrology linearity, a shielding structure is provided at the ray window for shielding X-rays with an energy value less than a preset value.

Specifically, since X-rays contain a series of electromagnetic waves λ of different wavelengths, the absorption coefficient μ of the same substance for X-rays is a cubic function of the wavelength of the included electromagnetic waves and is a variable. When X-rays pass through absorbers of different thicknesses, as the thickness of the absorber increases, the long-wavelength low-energy particles are absorbed by the material, and the total intensity of the X-rays after the short-wavelength high-energy particles penetrate the material decreases. The proportion of high-energy particles increases, and the X-ray energy spectrum after transmission is "hardened" compared to the energy spectrum before transmission.

We add shielding structures such as selective shielding materials to the ray window. For example, we can add a shielding material with a thickness of 4mm, which can shield X-rays with energy less than 60keV, reduce the degree of hardening of the X-ray energy spectrum, and eliminate X-ray hardening. Effect on metrological linearity.

In practical applications, the thickness of the shielding material may range from 4 to 5 mm.

In the above-mentioned specific embodiments, by adding a selective shielding material to the ray window, the degree of hardening of the X-ray energy spectrum is reduced, and the impact of X-ray hardening on the metrology linearity is eliminated.

As shown in Figures 1 and 3, an embodiment of the present invention also provides an X-ray nuclear scale, including:

X-ray sources, X-ray detectors, supports and weighing instruments;

wherein the Material belt;

The X-ray detector is connected to the weighing instrument;

The weighing instrument is used to determine the offset of the tube voltage and tube current parameters based on the X-ray energy and intensity output by the X-ray detector and the tube voltage and tube current parameters sent by the X-ray source. amount and send it to the X-ray source;

The X-ray source is used to adjust the tube voltage and tube current parameters according to the offset of the tube voltage and tube current parameters.

Optionally, the weighing instrument is also used to collect the X-ray intensity sampling value of the X-ray detector during the calibration period when the belt is running without load; based on the X-ray intensity sampling value, determine the The measurement zero point of the X-ray detector; the measurement zero point is the intensity information output by the X-ray detector when the belt is running without load.

Optionally, the weighing instrument is also used to separately collect the tube voltage parameter sampling value and tube current parameter sampling value of the X-ray source during the calibration period when the belt is running without load; according to the measurement zero point and The sampled value of the tube voltage parameter and the sampled value of the tube current parameter determine the source intensity zero point corresponding to the metering zero point; the source intensity zero point is the tube voltage and tube current parameters corresponding to the metering zero point.

Optionally, the weighing instrument is specifically used to determine whether the source intensity zero point belongs to the preset source intensity zero point range;

If the source intensity zero point does not belong to the preset source intensity zero point range, then determine the offset amount of the tube voltage parameter and the offset amount of the tube current parameter, and sum the offset amount of the tube voltage parameter and The offset of the tube current parameter is sent to the high-voltage power supply control module, so that the high-voltage power supply control module adjusts the tube voltage parameter and the tube current parameter.

Optional, also includes:

A speed measuring component connected to the weighing instrument; wherein the speed measuring component is arranged on the belt conveyor for measuring the transmission speed of the conveyor.

Specifically, the speed measurement component can be a speed sensor, which measures the transmission speed of the conveyor and feeds it back to the weighing instrument. The weighing instrument can be used to calculate data such as flow rate and shift output.

The implementation principles and technical effects of the nuclear scale in the above embodiment are similar to those in the method embodiment, and will not be described again here.

Other embodiments of the disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the disclosure that follow the general principles of the disclosure and include common common sense or customary technical means in the technical field that are not disclosed in the disclosure. . 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 structures described above and illustrated in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the 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.