Metering standard device for calibrating sensitivity index of metal detector

Abstract

The utility model discloses a measurement standard device for calibrating sensitivity indexes of a metal detector, which comprises a test block support fixing seat without metal components, a test block support and a metal test block, and the test block support is arranged on the test block support fixing seat; the metal test block is arranged on the test block bracket; the measurement standard device is provided with a plurality of metal test blocks, each metal test block comprises a body, and the bodies do not contain metal components; the body is internally provided with a metal ball accommodating cavity, the metal ball accommodating cavity is used for placing or not placing metal balls, and the diameters of the metal balls placed in the metal test blocks are different. The device disclosed by the utility model can be used for simulating the metering performance of various metals, so that the metal detector can be used for calibrating various metal detection sensitivity indexes.

Description

Technical Field

[0001] The utility model relates to the technical field of food metal detector calibration, in particular to a metrological standard device for calibrating metal detector sensitivity indicators in industries such as food and medicine. Background Art

[0002] In the food production industry, the main means of detecting foreign matter in food include x-ray detection, metal detection, visual inspection, electronic scanning and other methods. Among them, metal detectors based on the principle of electromagnetic induction are used in food packaging and material transmission lines to detect metal foreign matter in food. This is one of the most common methods. This method can effectively identify metal impurities mixed in food and materials, and remove the metal impurities in an appropriate manner. As a typical instrument for controlling metal impurities in food, metal detectors have been used in the food production industry for a long time. However, the production and use of metal detectors lack effective supervision, and the corresponding technical standards need to be further supplemented and improved.

[0003] Therefore, it is urgent to explore reliable calibration methods to more accurately confirm the working status and detection effect of food metal detectors to ensure the accuracy of detection. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a metrological standard device and method for calibrating the sensitivity index of a metal detector.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A metrological standard device for calibrating the sensitivity index of a metal detector comprises a test block holder fixing seat that does not contain metal components, a test block holder and a metal test block, wherein the test block holder is arranged on the test block holder fixing seat; the metal test block is arranged on the test block holder; the metrological standard device is equipped with a plurality of metal test blocks, wherein the metal test block comprises a main body, which does not contain metal components; a metal ball accommodating cavity is arranged in the main body, wherein the metal ball accommodating cavity is used for placing or not placing a metal ball, and the diameter of the metal ball placed in each metal test block is different.

[0007] Furthermore, a bracket mounting hole is provided on the test block bracket fixing seat, and the lower end of the test block bracket is fixed to the bracket mounting hole.

[0008] Furthermore, the metrology standard device includes a plurality of test block brackets of different heights, each of which can be used alone or in combination of two or more along the height direction. When used in combination, the combined test block brackets can be detachably connected.

[0009] Furthermore, both ends of each test block bracket are respectively provided with a mortise protrusion and a mortise slot. When used in combination, each test block bracket is mortise-jointed with each other through the mortise protrusion and the mortise slot.

[0010] Furthermore, the metal ball accommodating cavity is transparent.

[0011] Furthermore, a screw hole is provided on the main body, the screw hole is communicated with the metal ball accommodating cavity, and the screw hole is connected with a non-metallic blocking screw.

[0012] Furthermore, the test block bracket is evenly provided with a plurality of test block fixing holes along the height direction, the main body is provided with test block mounting screw holes matching the apertures of the test block fixing holes, and test block mounting non-metallic screws matching the test block mounting screw holes pass through the test block fixing holes and the test block mounting screw holes to fix the metal test block to the test block bracket.

[0013] Furthermore, a metal material parameter mark is processed on the main body; the metal material parameter mark is used to identify the material and diameter data of the metal ball.

[0014] Furthermore, the test block support fixing seat, the test block support and the body of the metal test block are all made of organic measuring materials.

[0015] The beneficial effect of the utility model is that the device of the utility model can be used to simulate various metal impurities such as broken needles, iron wires or lead, copper, aluminum, tin, stainless steel, etc. that are mixed or lost in food, raw materials or products, so as to be used for calibrating various metal detection sensitivity indicators of metal detectors. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the use of the measurement standard device in the embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of the specific structure of the metal test block in the embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the specific structure of the test block bracket in the embodiment of the utility model;

[0019] Figure 4 It is a schematic diagram of the specific structure of the test block bracket fixing seat in the embodiment of the utility model. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that this embodiment is based on the technical solution and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to this embodiment.

[0021] Example 1

[0022] This embodiment provides a measurement standard device for calibrating the sensitivity index of a metal detector, such as Figure 1-4 As shown, it includes a test block holder fixing seat 200 that does not contain metal components, a test block holder 300 and a metal test block 400, wherein the test block holder 300 is arranged on the test block holder fixing seat 200; the metal test block 400 is arranged on the test block holder 300; the metrology standard device is equipped with a plurality of metal test blocks 400, wherein the metal test block 400 includes a main body 470, and the main body 470 does not contain metal components; a metal ball accommodating cavity is arranged in the main body 470, and the metal ball accommodating cavity is used for placing or not placing a metal ball 430; the diameters of the metal balls 430 placed in each metal test block 400 are different.

[0023] In this embodiment, a bracket mounting hole 210 is provided on the test block bracket fixing seat 200 , and the lower end of the test block bracket 300 is fixed to the bracket mounting hole 210 .

[0024] In this embodiment, the metrology standard device includes a plurality of test block brackets 300 of different heights, each test block bracket 300 can be used alone or in combination along the height direction, and when used in combination, the combined test block brackets 300 can be detachably connected. By using each test block bracket 300 alone or in combination along the height direction, test block brackets of various heights can be obtained to meet different usage requirements.

[0025] Specifically, in this embodiment, both ends of each test block bracket 300 are respectively provided with a mortise protrusion 330 and a mortise slot 320 . When used in combination, each test block bracket 300 is mortised with each other via the mortise protrusion 330 and the mortise slot 320 .

[0026] Specifically, in this embodiment, the metrology standard device includes three test block brackets 300, with heights of 100 mm, 150 mm, and 200 mm respectively. By using these three test block brackets 300 individually or in combination, a bracket height range of 100 mm to 450 mm can be achieved.

[0027] In this embodiment, the metal ball accommodating cavity is transparent. The metal ball accommodating cavity is transparent so that the diameter of the metal ball can be measured by projection without taking out the metal ball.

[0028] In this embodiment, the body 470 is provided with a screw hole 420, the screw hole 420 is communicated with the metal ball receiving cavity, and the screw hole 420 is connected with a non-metallic plugging screw 410. The screw hole 420 and the non-metallic plugging screw 410 cooperate to block the metal ball receiving cavity. When the metal ball needs to be inserted / removed, the non-metallic plugging screw 410 can be removed to make the metal ball receiving cavity communicate with the outside, which is convenient for the installation / replacement of the metal ball.

[0029] In this embodiment, the test block bracket 300 is evenly provided with a plurality of test block fixing holes 310 along the height direction, and the main body 470 is provided with a test block mounting screw hole 450 matching the aperture of the test block fixing hole 310, and a test block mounting non-metallic screw 460 matching the test block mounting screw hole 450 passes through the test block fixing hole 310 and the test block mounting screw hole 450 to fix the metal test block 400 to the test block bracket 300.

[0030] Specifically, in this embodiment, the test block mounting holes 310 of each test block bracket 300 are spaced 10 mm apart and have a hole diameter of 6 mm.

[0031] In this embodiment, a metal material parameter mark 440 is processed on the main body 470 ; the metal material parameter mark 440 is used to mark the material and diameter data of the metal ball 430 .

[0032] Specifically, the body 470 can be made into a rectangular block shape (30 mm wide, 45 mm high, and 5 mm thick), or a cylindrical shape (6 mm in diameter and 45 mm high). In this embodiment, the body 470 is in a rectangular block shape.

[0033] In this embodiment, the test block support fixing seat 200, the test block support 300 and the body 470 of the metal test block 400 are all made of organic measuring materials. Specifically, the organic measuring material can be transparent acrylic.

[0034] Specifically, in this embodiment, the metrology standard device is equipped with 31 metal test blocks 400, one of which is not provided with a metal ball 430 and is used to adjust the detection limit sensitivity of the metal detector, and the metal containing cavity of the remaining metal test blocks 400 is provided with a metal ball 430, and the diameter of each metal ball 430 starts from 0.3 mm and increases in intervals of 0.1 mm until it increases to 3.2 mm. The diameter of the metal ball 430 can also be increased in other intervals or set arbitrarily according to specific use requirements.

[0035] Specifically, the metal ball is made of the metal material to be simulated, such as iron, lead, copper, aluminum, tin, stainless steel (Cr (chromium) mass content ≥ 18%), etc., to achieve calibration of the metal detector's detection sensitivity index to various metals.

[0036] Since stainless steel has the weakest magnetism among all types of metals and its spherical shape will not be affected by the detection angle, the metal material of the metal ball can also be fixed with stainless steel. If the metal detector has a good sensitivity index in detecting stainless steel materials, it can basically also sensitively detect various other metal materials.

[0037] Example 2

[0038] This embodiment provides a working method of the metrological standard device for calibrating the sensitivity index of the metal detector described in Embodiment 1, which adopts the "on-site" online (short-term shutdown) method for calibration. The specific process is:

[0039] First, adjust the sensitivity parameter of the metal detector to be calibrated to the maximum; install the test block bracket 300 on the test block bracket fixing seat 200; according to the test requirements, select a metal test block 400 with a metal ball 430 of a corresponding diameter and install it on the test block bracket 300. If the test starts from a metal ball with a minimum diameter of 0.3 mm, then install the corresponding metal test block 400 on the test block bracket 300.

[0040] The entire metrology standard is then placed on the conveyor belt 110 of the metal detector 100 to be calibrated, as shown in FIG. Figure 1 As shown, the entire metrology standard device is passed through the detection port 120 of the metal detector along with the conveyor belt 110, and this is repeated for a specified number of times (e.g., 10 times);

[0041] If the number of metal detector alarms is less than the set threshold, select other metal test blocks with metal balls of larger diameter and repeat the test until the number of alarms is greater than or equal to the set threshold. The diameter of the metal ball in the current metal test block 400 is the maximum sensitivity of the metal detector, thereby completing the calibration of the maximum sensitivity of the metal detector.

[0042] For those skilled in the art, various corresponding changes and modifications can be made according to the above technical solutions and concepts, and all of these changes and modifications should be included in the protection scope of the claims of the utility model.

Claims

1. A metrological standard device for calibrating the sensitivity index of a metal detector, characterized in that: The invention comprises a test block support fixing seat (200) that does not contain any metal component, a test block support (300) and a metal test block (400), wherein the test block support (300) is arranged on the test block support fixing seat (200); the metal test block (400) is arranged on the test block support (300); the metrology standard device is equipped with a plurality of metal test blocks (400), wherein the metal test block (400) comprises a body (470), wherein the body (470) does not contain any metal component; a metal ball accommodating cavity is arranged in the body (470), wherein the metal ball accommodating cavity is transparent, and is used to place or not place a metal ball (430), and the diameter of the metal ball (430) placed in each metal test block (400) is different; and a screw hole (420) is arranged on the body (470), wherein the screw hole (420) is communicated with the metal ball accommodating cavity, and the screw hole (420) is connected with a non-metallic plugging screw (410).

2. The measurement standard device according to claim 1, characterized in that: The test block bracket fixing seat (200) is provided with a bracket mounting hole (210), and the lower end of the test block bracket (300) is fixed to the bracket mounting hole (210).

3. The measurement standard device according to claim 1, characterized in that: It comprises a plurality of test block brackets (300) of different heights. Each test block bracket (300) can be used alone or two or more test block brackets (300) can be used in combination along the height direction. When used in combination, the combined test block brackets (300) can be detachably connected.

4. The measurement standard device according to claim 3, characterized in that: Both ends of each test block bracket (300) are respectively provided with a mortise protrusion (330) and a mortise slot (320); when used in combination, each test block bracket (300) is mortise-jointed with each other via the mortise protrusion (330) and the mortise slot (320).

5. The measurement standard device according to claim 1, characterized in that: The test block bracket (300) is evenly provided with a plurality of test block fixing holes (310) along the height direction, the body (470) is provided with test block mounting screw holes (450) whose apertures match those of the test block fixing holes (310), and test block mounting non-metallic screws (460) matching the test block mounting screw holes (450) pass through the test block fixing holes (310) and the test block mounting screw holes (450) to fix the metal test block (400) to the test block bracket (300).

6. The measurement standard device according to claim 1, characterized in that: The body (470) is processed with a metal material parameter mark (440); the metal material parameter mark (440) is used to mark the material and diameter data of the metal ball (430).

7. The measurement standard device according to claim 1, characterized in that: The test block support fixing seat (200), the test block support (300) and the body (470) of the metal test block (400) are all made of organic measuring materials.

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