JP4614316B2 - Intracarcass injection needle detection device and detection method - Google Patents

Description

  The present invention relates to an intracarcass injection needle detection apparatus, and more particularly to an injection needle detection apparatus and detection method in a carcass during suspension movement using a magnetic impedance (MI) sensor capable of detecting a magnetic field.

  For livestock being raised, injection for prevention or treatment is performed, but the needle may be broken during the injection, and the tip may remain in the livestock. The broken injection needle remains in the carcass even after slaughtering or dismantling, and remains in the partial meat even after being processed into partial meat at the meat center or partial meat processor.

Conventionally, metallic foreign objects, especially broken needles that have been considered as problems, are provided in the conveyor line before the partial meat, which is a product that has been deboned and formed in the partial meat processing process, is transported and packed on the conveyor. Inductive coil type magnetic detection device (hereinafter abbreviated as magnetic detection device) was used to detect and remove metallic foreign objects such as injection needles. For example, Patent Document 1 discloses a metal detector that detects a minute metal in a test object with high sensitivity using an electromagnetic sensor, and Patent Document 2 discloses an upstream of a transport belt that transports the test object. A metal detection device that can detect a minute metal piece by disposing a discharge ion generator on the side is disclosed.
JP-A-7-198860 JP-A-10-111362

  When a conventional magnetic detection device is used to detect the residual injection needle of the partial meat that has been divided, the magnetic characteristics of the partial meat itself, the magnetic characteristics of the needle material stainless or iron, and the direction of the injection needle It is difficult to set the dip phase angle and sensitivity of the magnetic detection device because of the magnetic characteristics and the like, and two magnetic detection devices are passed at different angles in order to increase detection accuracy. Such a problem occurs not only in the partial meat but also in other meats, and there has been an increasing demand for improving the metal detection accuracy of the meat.

  In addition, superconducting materials have characteristics such as Josephson effect and magnetic flux quantization. Using these properties, superconducting quantum interference devices, which are highly sensitive magnetic sensors, can be fabricated. There is a problem that must be made. In recent years, high-temperature superconducting materials that become superconducting at liquid nitrogen temperature have been developed, so that highly sensitive magnetic detection can be performed relatively easily. Practical application in iron fine powder detection, cardiac magnetic field measurement, IC defect detection, fault / mineral investigation, etc. has been attempted, and measures for food factory lines where there are many sources of magnetic noise and continuous processing is desired are being studied. The practical application of meat flowing on the line has also been studied.

  However, there are about 4000 factories in the country that are downstream of livestock meat processing, whereas there are about 200 slaughterhouses and meat centers on the upstream side, so the detection of broken needles in the carcass state at the slaughterhouses and meat centers If this is possible, the occurrence of problems due to the inclusion of metallic foreign objects, particularly broken needles, on the consumer side is greatly suppressed, and it has been desired to detect and remove metals in the carcass state upstream of the processing steps. However, the superconducting quantum interference device has a large apparatus because it needs to be kept at a low temperature, and there are obstacles to using it for metal detection of carcasses that are suspended and moved. Has been neglected.

  An object of the present invention is to provide an intracarcass needle detection apparatus that can detect a broken needle in a carcass that is suspended and moving.

The intracarcass injection needle detection device of the present invention,
An intra-carcass needle detection device for detecting a broken needle remaining inside a carcass, a detector for detecting the magnetism of the broken needle remaining in contact with the carcass, and measurement by the detector And a control unit for detecting the position of the broken injection needle from the result, and the detection unit is located at a position away from the contact portion between the first magnetic sensor element and the carcass disposed in the vicinity of the contact portion with the carcass. A plurality of magnetic detection sensors that house the second magnetic sensor element provided as a set are provided, and the magnetic detection sensors are arranged in a direction orthogonal to the scanning direction with respect to the carcass of the detection unit for detecting the broken injection needle. The control unit calculates a difference between the output of the first magnetic sensor element and the output of the second magnetic sensor element of each magnetic detection sensor, and the difference value is a predetermined threshold value. When the value is exceeded, a needle detection alarm is output. Here, the first magnetic sensor element and the second magnetic sensor element may be magnetic impedance sensors.

  In the first aspect, the detection unit includes a main body having a rectangular parallelepiped housing and a handle for operating the main body, and the longitudinal side surface of the housing opposite to the handle has a carcass. An opening serving as a contact portion is provided, and a plurality of magnetic detection sensors are arranged in a row in the main body with the first magnetic sensor element facing the opening.

  The injection needle detection alarm may be output to a first detection lamp provided in the detection unit corresponding to each of the magnetic detection sensors, and further, a first detection lamp provided in the control unit corresponding to each of the magnetic detection sensors. It may be output to two detection lamps. It is desirable that a magnetic shield material be disposed on the entire surface of the main body casing except for the contact surface with the carcass.

  In the second aspect, the detection unit has a main body part having a detection surface whose upper part is inclined inwardly for causing the carcass to contact and slide in the horizontal direction, and to support the main body part so as to be self-supporting on the floor surface. A sensor box that houses a plurality of magnetic detection sensors in a row, and the magnetic detection sensor is vertically oriented with the first magnetic sensor facing an opening provided on the detection surface. It is arranged to line up. The injection needle detection alarm may be output to at least a detection lamp provided for each of the magnetic detection sensors in the control unit, and the sensor box housing has a magnetic shield on the entire surface except the contact surface with the carcass. It is desirable that the material is disposed.

  In the second aspect, a magnetizing device for magnetizing the broken injection needle remaining in the carcass parallel to the sensor box may be disposed on the carcass entry side of the main body, A plurality of spray sterilization nozzles for spraying a sterilizing liquid are arranged in parallel to the sensor box in order to clean the contact portion of the detection surface of the main body part with the detection surface of the opposite carcass. Also good.

  In common with the first aspect and the second aspect, the first magnetic sensor element and the second magnetic sensor element may be disposed 10 to 20 mm apart from each other. They may be arranged in a row 15 mm apart. The carcass may be hung by a hook trolley that moves on the trolley rail, and the carcass may be a pork carcass.

The method for detecting an intracarcass injection needle according to the present invention comprises:
A method for detecting an intracarcass injection needle using the intracarcass injection needle detection device according to the first aspect, wherein the tip of the magnetic detection sensor arranged in front of the detection unit main body comes into contact with the carcass by the operation of the detection unit. The step of moving in a direction perpendicular to the direction in which the magnetic detection sensors are arranged, the output of the first magnetic sensor element close to the tip of each magnetic detection sensor, and the second of the position away from the tip A step of calculating a difference between outputs of the magnetic sensor elements and monitoring whether the difference value exceeds a predetermined threshold value, and a needle detection alarm when the difference value exceeds a predetermined threshold value Is output.

  Further, in the intracarcass injection needle detection method using the intracarcass injection needle detection device according to the second aspect, the shoulder of the carcass comes into contact with the detection surface of the detection unit, and is aligned in the direction perpendicular to the detection surface. A step in which the shoulder of the carcass moves in a horizontal direction while contacting the tip of the magnetic sensor, and the control unit outputs the output of the first magnetic sensor element close to the tip of each magnetic sensor and the tip. A step of calculating a difference between outputs of the second magnetic sensor elements at a distant position and monitoring whether the difference value exceeds a predetermined threshold; and the difference value exceeds a predetermined threshold A step of outputting a needle detection alarm.

  Further, in the second aspect, before the step of moving the carcass in the horizontal direction while contacting the tip of the magnetic detection sensor, the shoulder of the carcass contacts the detection surface of the detection unit and is arranged in the vertical direction. After the step of moving the shoulder of the carcass horizontally in the vicinity of the magnetized device and the step of outputting a needle detection alarm when the difference value exceeds a predetermined threshold value, May include a step in which the shoulder of the carcass moves in the horizontal direction in the vicinity of the plurality of spray sterilization nozzles arranged in the vertical direction in proximity to the detection surface of the detection unit.

The intracarcass injection needle detection device of the present invention has the following effects. That is,
1) The metal mixed in the carcass can be detected with high sensitivity. This can be detected by an inspector's operation by providing a carcass injection needle detection device in the vicinity of the carcass movement line that has a portable detection unit that can detect the metal in the carcass by contacting the carcass that is suspended and moving. This is because a sensor box is provided on the detection surface of the fixed main body, and it is possible to detect the injection needle by moving the shoulder portion of the carcass that is suspended and moving while contacting the detection surface.
2) It is possible to detect broken pieces of the injection needle in the carcass that had a problem in detection accuracy. This is to detect the broken pieces of the injection needle within the width by moving the detection parts, which are arranged as a set of two MI sensors as a set to detect noise, along the carcass surface. Because it can.
3) Marking for specifying and removing the detection position is easy. This is because a detection lamp is provided for each set of detection elements, so that the inspector can easily mark the detection position of the carcass injection needle.
4) The whole object can be detected with a small number of detection devices and detection locations, and the man-hour and inspection equipment for the inspection as a whole can be saved. This is because the detection of the injection needle is performed at the slaughterhouse or the meat center when it is upstream of the processing step, so that the detection in a number of conventional partial meat processing steps can be omitted.

  Next, an embodiment of the intracarcass injection needle detection device of the present invention will be described with reference to the drawings. The in-carcass injection needle detection device according to the present invention is the first embodiment of the portable type in which detection is performed by sliding the portable detection unit in contact with the shoulder of the carcass suspended by the inspector. Intracarcass injection needle detection device, and detection of intracarcass injection needle according to the second embodiment of the fixed type in which a sensor box is provided on the detection surface of the fixed detection unit and the shoulder of the carcass is moved while being in contact There is a device. In this example, the carcass is suspended and moved by a trolley. However, the present invention is not limited to this, and the carcass part to be inspected (here, the shoulder part where the injection needle remains) will be detected. What is necessary is just to be able to hold | maintain the state which can contact and move with the magnetic detection sensor of an apparatus.

  First, the intracarcass injection needle detection device of the first embodiment will be described with reference to the drawings. FIG. 1 is a schematic perspective view for explaining a use state of the intracarcass injection needle detection device according to the first embodiment of the present invention, and FIG. 2 is a detection of the intracarcass injection needle detection device of FIG. FIG. 3A is a top view, FIG. 3B is a side view, and FIG. 3 is a schematic cross-sectional view of a magnetic detection sensor built in the detection unit of FIG.

  As shown in FIG. 1, the intracarcass needle detection device 11 includes a control box 40 in which a detection unit 20 and a control unit are accommodated, and a carcass 50 suspended from a hook 62 of a hook trolley 61 that moves on a trolley rail 63. Then, the sensor portion of the detection unit 20 is slid in contact with the detection portion 20 to detect the injection needle inside the carcass 50. Usually, the detection operation is performed mainly on the neck of the shoulder portion where there is a high probability that the injection needle remains. A balancer (not shown) that suspends the detection unit 20 with a holding wire may be provided so that the detection unit 20 is held in the suspended position even when the inspector 70 releases the hand.

  As shown in FIG. 2, the detection unit 20 includes a main body 21 and a handle 22, and the main body 21 includes a plurality of magnetic detection sensors 30 with one end exposed from the housing in parallel. Detection lamps 23 corresponding to the respective magnetic detection sensors 30 are provided on the surface of the, and are held by the inspector 70 by the handle 22 to detect the injection needle inside the carcass 50. The casing of the main body 21 is preferably provided with a magnetic shield material 21 a on the entire surface except the contact surface with the carcass 50. This is to avoid disturbance due to the influence of external magnetism on the magnetic detection sensor 30, and a permalloy foil, a cobalt-based amorphous metal foil, or the like can be used as the magnetic shield material 21a.

  The interval between the magnetic detection sensors 30 is an interval at which all the injection needles in the width direction of the sliding portion can be detected when the detection unit 20 is slid on the surface of the carcass 50 in the direction perpendicular to the row of the magnetic detection sensors 30. According to the experimental example, it is possible to detect all injection needles at intervals of about 10 mm to 15 mm. The number of magnetic detection sensors 30 is determined by the desired scanning width, but about ten are easy to handle.

  As shown in FIG. 3, the magnetic sensor 30 is provided with a first sensor unit 31 on the exposed side and a second sensor unit 32 on the opposite side, and is controlled via a signal line 46. The control unit in the box 40 is connected. The first sensor unit 31 and the second sensor unit 32 are provided with an MI sensor element 33 and an MI sensor element 34 for detecting magnetism, respectively. Further, it is desirable that the exposed portion of the detection unit 20 of the magnetic detection sensor 30 from the main body 21 is protected by a cap 35.

  A magnetic impedance (MI) sensor is a magnetic sensor that senses magnetism using the magneto-impedance effect. In combination with the GPS function of a mobile phone, it is used as a direction sensor for location-based services. Development of applications such as sensitivity non-contact recognition and identification, geomagnetic detection, and residual magnetism detection are being studied.

  There are many magnetic sources in the processing place where the carcass 50 is transported, and accurate detection of the injection needle is difficult unless the influence of the noise is removed. Since the first sensor unit 31 is provided on the contact side with the carcass 50 inside the magnetic detection sensor 30 and the second sensor unit 32 is provided on the opposite side, the first sensor unit adjacent to the carcass 50 is provided. The MI sensor element 33 of 31 detects the magnetism of the injection needle in the carcass 50 together with the surrounding magnetic noise, and the MI sensor element 34 of the second sensor unit 32 detects only the surrounding magnetic noise. Since the two sensor elements are provided close to each other, the surrounding magnetic noise to be detected is considered to be substantially the same. When the two sensor elements are separated from each other, a difference is generated between the surrounding magnetic noises detected by the two sensor elements. According to the experimental example, the distance between the two sensor elements is preferably 10 to 20 mm. Therefore, the magnetism of the injection needle can be calculated by calculating the difference between the gains detected by the two sensor elements by the control unit of the control box 40. When the value exceeds the threshold value, the detection unit 20 corresponding to the magnetic detection sensor 30 is calculated. The detection lamp 23 of the main body 21 and the detection lamp 41 of the control box 40 are lit for a predetermined time. Thereby, the inspector 70 can know the detection of the injection needle. In this case, an alarm sound may be generated. Further, the detection lamp 41 of the control box 40 may not be provided. As described above, the magnetic shield material 21a is disposed on the entire surface of the housing of the main body 21 except for the contact surface with the carcass 50, thereby reducing the influence of an external magnetic source.

  The detection limit of the injection needle from the carcass surface to the tip of the injection needle by the MI sensor 33 arranged in the first sensor unit 31 is about 30 mm, but the injection needle penetrates the fat layer (15 to 20 mm) and the red meat The length of the broken needle is as long as 15 to 25 mm, so it is difficult to move in the muscle. The tip on the surface side of the broken needle is usually 30 mm from the carcass surface. Remains within.

  The control unit in the control box 40 is connected to the detection unit 20 with a cable 47, and inputs and outputs power and signals. The MI sensor of the first sensor unit 31 of each magnetic detection sensor 30 of the detection unit 20 is provided. A difference in gain detected by the MI sensor element 34 of the element 33 and the second sensor unit 32 is calculated, and when the value exceeds a threshold value, the detection lamp of the main body 21 of the detection unit 20 corresponding to the magnetic detection sensor 30 23 is turned on for a certain period of time. When the control box 40 is also provided with a detection lamp 41 indicating the detection of the injection needle corresponding to each magnetic detection sensor 30, the detection lamp 41 is also lit for a predetermined time. The detection lamp 23 and the detection lamp 41 may be blinking or may generate an alarm sound.

  FIG. 4 shows a control circuit block diagram of the control unit. The output from the first sensor unit 31 is filtered and amplified by the high-pass filter 81 a and the amplifier 82 a and is input to the subtraction circuit 83. The output from the second sensor unit 32 is also filtered and amplified by the high-pass filter 81 b and the amplifier 82 b and input to the subtraction circuit 83. The subtraction circuit 83 performs a subtraction process between the two input values, and the subtraction result is filtered by the low-pass filter 84 and input to the comparator 85 and compared with the positive threshold value 86a and the negative threshold value 86b. In the case of exceeding, an alarm output signal is output by the pulse generator 87.

  If the control box 40 is provided with a place where the detector 20 is not used, and a place where the magnet 73, the mark pen 71 and the inspection certificate 72 are placed in advance to magnetize the carcass in order to increase detection accuracy, the work of the inspector 70 Becomes easy.

  Next, the operation of detecting the injection needle by the intracarcass injection needle detection device 11 of the first embodiment will be described. FIG. 5 is a flowchart for explaining the operation of detecting an injection needle by the intracarcass injection needle detection device of the present embodiment.

  When the processing is started, the carcasses 50 that have been pre-processed on the body are suspended from the hook 62 of the hook trolley 61 that can move on the trolley rail 63 one by one at the rear legs, and sequentially move to inspectors. It is carried to before 70 (step S11). The inspector 70 scans the surface of the carcass 50 with the magnet 73 and magnetizes the injection needle that is expected to be in the carcass 50. Although this step is not indispensable, it is desirable to perform this operation in order to increase the signal strength (S12). The inspector holds the handle 22 of the detection unit 20 of the intracarcass injection needle detection device 11 and brings the tip of the magnetic detection sensor 30 aligned in front of the main body 21 into contact with the carcass 50 so that the magnetic detection sensors 30 are aligned. The detection of the injection needle is monitored (S13). The site to be examined is the neck of the carcass shoulder, where injections are usually made.

  The control unit calculates the difference between the output from the first sensor unit 31 and the output from the second sensor unit 32 of each magnetic detection sensor 30, and performs injection when the difference value exceeds a predetermined threshold value. Since the needle detection alarm is output and the detection lamp 23 corresponding to the detected magnetic detection sensor 30 is lit for a certain time (S14Y), the inspector 70 stops scanning (S15) and the mark pen 71 using edible ink Then, the place where the injection needle of the carcass 50 is detected is marked (S16), the process is resumed (S17), and the process returns to step S13. If all scans have not been completed (S18N), the scan position is changed (S19), and the process returns to step S13 to start scanning. When all the scans are completed (S18Y), if there is no detection mark of the injection needle (S20N), the inspection certificate 72 is pasted on the carcass 50 (S21), and the carcass 50 is moved on the trolley rail 63 (S22). When there is a needle detection mark (S20Y), the carcass 50 is moved on the trolley rail 63 as it is (S22). At the same time, the next carcass 50 is set in front of the inspector 70 (S11), and the inspection is repeated. The carcass without the detection mark of the injection needle (S23N) is stored in the refrigerator as it is (S26), and the carcass 50 marked by detecting the injection needle (S23Y) is separated from the normal carcass 50 and stored refrigerated ( S24) The place marked using a knife is carefully cut open and the injection needle is confirmed and removed (S25), then stored in the refrigerator (S26), and the process ends.

  The intra-carcass injection needle detection device of the present embodiment can be widely used for detecting broken injection needles in the carcasses that are suspended, but is particularly effectively applied to pork carcasses. Moreover, although the state where the carcass is suspended has been described, the present invention is not limited to this, and even when the carcass is not suspended, detection can be performed in the same manner. In some cases, detection is possible.

  Next, the result of an injection needle detection test using the MI sensor will be described with reference to FIG. In this test, polystyrene foam was used instead of carcass, and the distance D from the measurement surface to the tip of the injection needle was changed to 10, 20, 25, 30 mm, and the distance (offset) between the injection needle and the scan line of the MI sensor was changed. The output of the MI sensor was measured by changing the distance between 0 and 30 mm at intervals of 5 mm. The electrical characteristics of the MI sensor used are 160 mV / mGauss. The graph of FIG. 6 shows the measurement results of the needle depth, offset distance, and output voltage of the injection needle detection test. Assuming that the S / N ratio measured at the same time was 2 or more, the detectable limit was 30 to 35 mm in the linear distance between the sensor and the needle end regardless of the offset. Assuming that the S / N ratio of 3 or more is a detectable limit, when the depth D of the needle tip is 25 mm, the offset is desirably 10 mm to 15 mm.

  Next, an intracarcass injection needle detection apparatus according to a second embodiment will be described with reference to the drawings. FIG. 7 is a schematic perspective view for explaining a use state of the intracarcass injection needle detection device according to the second embodiment of the present invention, and FIG. 8 uses the intracarcass injection needle detection device of FIG. Fig. 9 is a schematic view showing a state where the injection needle in the carcass is being detected, (a) is a top view, (b) is a side view, and Fig. 9 is a side view of Fig. 8 and a schematic diagram of a sensor box. It is a figure, (a) is a side view, (b) is a typical side view of a sensor box.

  In the carcass needle detection device 12 of the second embodiment, the detection unit 20 of the carcass needle detection device 11 of the first embodiment, which is a portable type, is a fixed type, and magnetic detection is performed. Since the configurations and functions of the control unit housed in the sensor 30 and the control box 40 are the same as those in the first embodiment, the same reference numerals and names are used and description thereof is omitted.

  As shown in FIG. 7, the intracarcass needle detection device 12 includes a control box 40 in which the detection unit 20 and the control unit are housed, and the carcass 50 is suspended from a hook 62 of a hook trolley 61 that moves on a trolley rail 63. By moving the carcass 50 in the horizontal direction while bringing the carcass 50 into contact with the detection surface 26 of the main body 25 in which the sensor boxes 36 each having a plurality of magnetic detection sensors 30 arranged in a row are vertically arranged. Detect the needle.

  The detection surface 26 of the main body portion 25 of the detection unit 20 fixed by the support legs 27 is a height that contacts the entire shoulder portion 56 of the carcass 50 that is suspended and moved, and the upper portion is the rear side at the same angle as the shoulder portion 56. Both sides are curved so that the carcass 50 can easily enter and exit. On the back surface of the detection surface 26, with the sensor box 36 as the center, a magnetizing device 37 is arranged on the entrance side of the carcass 50, and a spray sterilization nozzle 38 is arranged on the exit side alongside the sensor box 36 in the vertical direction. . The magnetizing device 37 is a device that magnetizes an injection needle that is expected to be in the carcass 50 by a magnet. This device is not indispensable, but it is desirable to perform this magnetizing operation in order to increase the signal strength. The spray sterilization nozzle 38 is a device for sterilizing the surface of the carcass 50 whose surface may have been contaminated by contact with the detection surface 26, and a known spray sterilization device is used. Although this device is not essential, it is desirable to provide it from the viewpoint of hygiene. Otherwise, it is desirable that an operator manually spray the sterilizing liquid.

  As shown in FIG. 9B, the sensor box 36 has substantially the same configuration as the main body 21 of the detection unit 20 of the first embodiment, and the magnetic detection sensors 30 are housed in one row inside. ing. However, this time, it is desirable that the width required for scanning is wide and about 600 mm. Therefore, when the interval between the magnetic detection sensors 30 is 10 mm, it is necessary to provide 60 magnetic detection sensors 30. The magnetic detection sensor 30 built in the sensor box 36 is the same as the magnetic detection sensor 30 of the first embodiment described with reference to FIG. 3, and description thereof is omitted, including the process of determining injection needle detection. As in the first embodiment, it is desirable that the sensor box 36 is provided with a magnetic shield material 36a on the entire surface except the contact surface with the carcass 50.

  In the first embodiment, the detection lamp 23 is provided in the main body 21 of the detection unit 20. However, in the second embodiment, the detection lamp 24 is provided in the control box 40 arranged close to the detection unit 20. Be placed. If possible, the detection position can be easily marked if it is provided at a height corresponding to the height of each magnetic detection sensor 30. In addition to the individual detection lamps 24, it is desirable to provide a common detection lamp 24 in an easy-to-see state, turn on any magnetic detection sensor 30, and issue an alarm.

  In the second embodiment, it is necessary to move the shoulder portion 56 having a high probability of remaining the injection needle of the carcass 50 while being pressed against the detection surface 26 of the main body portion 25. The carcass 50 is split back into a left carcass 51 and a right carcass 52, and the left carcass 51 and the right carcass 52 are usually paired with one hook 62 as shown in FIGS. 53 is suspended. As shown in FIG. 8, when the inspector 70 rotates the carcasses 50 so that the front legs 54 of the left carcass 51 and the front legs 54 of the right carcass 52 are aligned on their own side, the shoulders 56 are shown in FIG. As shown in FIG. 8B, the carcass 50 is moved to the hook trolley 61 by adjusting the shoulder 56 so that the entire shoulder 56 contacts the detection surface 26 as shown in FIG. Therefore, it moves while sliding on the detection surface 51.

  The metal piece near the magnetizing device 37 of the carcass 50 is magnetized by the action of the magnetizing device 37 at the initial position. Next, when it passes over the sensor box 36, the magnetic detection sensor 30 detects a metal piece such as an injection needle inside the carcass 50, and when it is detected, the detection lamp 24 of the control box 40 is turned on. The detected position of the carcass 50 is marked from the position. The carcass 50 that has passed through the sensor box 36 is sterilized on the surface of the carcass 50 in contact with the detection surface 26 by the next spray sterilization nozzle 38.

  Next, the operation of detecting the injection needle by the intracarcass injection needle detection device 12 according to the second embodiment will be described. FIG. 10 is a flowchart for explaining the operation of detecting an injection needle by the intracarcass injection needle detection apparatus of the second embodiment.

  When the processing is started, the carcasses 50 that have been pre-processed on the body are suspended from the hook 62 of the hook trolley 61 that can move on the trolley rail 63 one by one at the rear leg, and sequentially move to the detection surface. 26, the inspector 70 holds the forefoot 54 and sets so that the carcass shoulder 56 where normal injection is performed faces the detection surface 26 (step S31). The carcass 50 passes by the hook trolley 61 in front of the magnetizing device 37 on the detection surface 26, and the injection needle expected to be in the carcass 50 is magnetized (S32). Next, when the carcass 50 passes by the hook trolley 61 in front of the sensor box 36 on the detection surface 26, the carcass 50 moves in a direction orthogonal to the direction in which the magnetic detection sensors 30 are arranged, so that the injection needle within the width is detected. (S33).

  The control unit calculates the difference between the output from the first sensor unit 31 and the output from the second sensor unit 32 of each magnetic detection sensor 30, and performs injection when the difference value exceeds a predetermined threshold value. A needle detection alarm is output, and the detection lamp 24 corresponding to the detected magnetic detection sensor 30 is lit for a certain time (S34Y). Therefore, the scan is interrupted (S35), and the inspector 70 uses the edible ink as a mark pen 71. Then, the place where the injection needle of the carcass 50 is detected is marked (S36), the process is resumed (S37), and the process returns to step S33. The scan is continued until the scan of one carcass 50 is completed (S38N). When the scan of one carcass 50 is completed (S38Y), if there is no detection mark of the injection needle (S39N), the carcass 50 is inspected. A certificate 72 is attached (S40), and the carcass 50 is moved on the trolley rail 63 (S41). If there is a detection mark on the injection needle (S39Y), the carcass 50 is moved on the trolley rail 63 as it is (S41). At the same time, the inspector 70 sets the next carcass 50 (S31), and the inspection is repeated. The carcass without the detection mark of the injection needle (S42N) is stored in the refrigerator as it is (S45), and the carcass 50 detected and marked with the injection needle (S42Y) is separated from the normal carcass 50 and stored refrigerated (S43). ), The place marked with the knife is carefully cut open and the injection needle is confirmed and removed (S44) and stored in the refrigerator (S45), and the process is completed.

It is a typical perspective view for demonstrating the use condition of the intracarcass injection needle detection apparatus of the 1st Embodiment of this invention. It is a schematic diagram of the detection part of the intracarcass injection needle detection apparatus of FIG. (A) is a top view. (B) is a side view. FIG. 3 is a schematic cross-sectional view of a magnetic detection sensor built in the detection unit of FIG. 2. It is a control circuit block diagram of a control part. It is a flowchart explaining the operation | movement of the injection needle detection by the intracarcass injection needle detection apparatus of 1st Embodiment. It is a graph which shows the measurement result of the needle depth of an injection needle detection test, offset distance, and output voltage. It is a typical perspective view for demonstrating the use condition of the intracarcass injection needle detection apparatus of the 2nd Embodiment of this invention. It is a schematic diagram which shows the state which is detecting the injection needle in a carcass using the intracarcass injection needle detection apparatus of FIG. (A) is a top view. (B) is a side view. It is the side view of FIG. 8, and the schematic diagram of a sensor box. (A) is a side view. (B) is a schematic side view of a sensor box. It is a flowchart explaining the operation | movement of the injection needle detection by the intracarcass injection needle detection apparatus of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11, 12 Intracarcass injection needle detection apparatus 20 Detection part 21 Main body 21a, 36a Magnetic shield material 22 Handle 23, 24, 41 Detection lamp 25 Main part 26 Detection surface 27 Support leg 30 Magnetic detection sensor 31 1st sensor part 32 1st 2 sensor parts 33, 34 MI sensor element 35 Cap 36 Sensor box 37 Magnetostatic device 38 Spray sterilization nozzle 40 Control box 46 Signal line 47 Cable 50 Carcass 51 Left carcass 52 Right carcass 53 Rear foot 54 Forefoot 55 Back 56 Shoulder 61 Hook trolley 62 hook 63 trolley rail 70 inspector 71 mark pen 72 inspection certificate 73 magnet 81a, 81b high-pass filter 82a, 82b amplifier 83 subtraction circuit 84 low-pass filter 85 comparator 86a positive threshold 86b negative threshold 87 pulse generator S1 ~S26, S31~S45 step

Claims (12)

An in-carcass needle detection device for detecting a broken needle remaining inside a carcass,
A detection unit that detects magnetism of the broken injection needle remaining in contact with the carcass, and a control unit that detects the position of the broken injection needle from the measurement result of the detection unit;
The detection unit includes a pair of a first magnetic sensor element disposed in the vicinity of the contact portion with the carcass and a second magnetic sensor element disposed at a position away from the contact portion with the carcass. A plurality of magnetic detection sensors to be housed, and the magnetic detection sensors are arranged in a row in a direction perpendicular to the scanning direction of the carcass of the detection unit for detecting the broken injection needle,
The control unit calculates a difference between the output of the first magnetic sensor element and the output of the second magnetic sensor element of each of the magnetic detection sensors, and the difference value exceeds a predetermined threshold value To output a needle detection alarm
The detection unit includes a main body having a detection surface whose upper part is inclined inward for causing the carcass to contact and slide in the horizontal direction, and support legs that support the main body and stand on the floor surface. The main body includes a sensor box that houses a plurality of the magnetic detection sensors in a row, and the magnetic detection sensor faces the first magnetic sensor element toward an opening provided on the detection surface. An intracarcass injection needle detection device arranged in a vertical direction.   The intracarcass injection needle detection apparatus according to claim 1, wherein the first magnetic sensor element and the second magnetic sensor element are magnetic impedance sensors. The intra-carcass injection needle detection device according to claim 1 or 2 , wherein the injection needle detection alarm is output to at least a detection lamp provided in the control unit corresponding to each of the magnetic detection sensors. The in-carcass injection needle detection device according to any one of claims 1 to 3 , wherein a magnetic shield material is disposed on a whole surface of the sensor box casing except for a contact surface with the carcass. Furthermore, the magnetizing apparatus for magnetizing the broken injection needle which remains in the inside of the carcass is arranged in parallel with the sensor box on the entrance side of the carcass of the main body . The intracarcass needle detection device according to any one of the preceding claims. Furthermore, a plurality of spray sterilization nozzles for spraying a sterilizing liquid are provided on the sensor box on the exit side of the carcass of the detection surface of the main body in order to clean a contact portion of the facing carcass with the detection surface. The intracarcass injection needle detection device according to any one of claims 1 to 5 , which is arranged in parallel. The intra-carcass injection needle detection device according to any one of claims 1 to 6, wherein the first magnetic sensor element and the second magnetic sensor element are disposed at a distance of 10 to 20 mm. The intra-carcass injection needle detection device according to any one of claims 1 to 7, wherein the magnetic detection sensors are arranged in a line at a distance of 10 to 15 mm from each other. The intracarcass injection needle detection device according to any one of claims 1 to 8 , wherein the carcass is suspended from a hook trolley that moves on a trolley rail. The in-carcass injection needle detection device according to any one of claims 1 to 9 , wherein the carcass is pork carcass. A method for detecting an intracarcass needle using the intracarcass needle detection device according to claim 1 ,
A step in which the shoulder portion of the carcass contacts the detection surface of the detection unit, and the shoulder portion of the carcass moves in a horizontal direction while contacting the distal ends of the plurality of magnetic detection sensors arranged in a direction perpendicular to the detection surface; ,
The control unit calculates a difference between the output of the first magnetic sensor element close to the tip of each magnetic detection sensor and the output of the second magnetic sensor element at a position away from the tip, and the difference value is a predetermined value. Monitoring whether a threshold is exceeded;
And a step of outputting an injection needle detection alarm when the difference value exceeds a predetermined threshold value. Furthermore, before the step in which the carcass moves in the horizontal direction while being in contact with the tip of the magnetic sensor, the shoulder of the carcass is in contact with the detection surface of the detection unit, and After the step of moving the shoulder portion of the carcass in the horizontal direction in the vicinity and outputting the needle detection alarm when the difference value exceeds a predetermined threshold, the shoulder portion of the carcass is moved to the detection portion. close to the detection surface, in the vicinity of the plurality of spray sterilizing nozzles arranged in the vertical direction, the shoulder portions of the branches meat comprising the step of moving in the horizontal direction, carcass injection needle detected according to claim 1 1 Method.

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