Grain sampling detection and separation sample delivery box and delivery method

Abstract

According to the grain sampling detection and separation sample delivery box and delivery method, doors are arranged on the two sides of the sampling detection and separation sample delivery box, the sampling detection and separation sample delivery box is installed on the wall of a detection room, an electromagnetic locking mode is adopted, when the door is opened on one side, the other side door is powered on and locked, the suction force is about 120 kg, and the sampling detection and separation sample delivery box cannot be opened. A gravity sensing plate is arranged on the lower side of the box body, an alarm can be given only when an inspection person places a grain sample on the gravity sensing plate in the box body and closes an opening and closing door on the side face, a 12v radar intelligent human body infrared sensing switch is arranged outside the sampling inspection box body, the sensing angle can be 120 degrees, and the sensing distance can be adjusted from 0 m to 8 m. And an inspector can open the box door only after the sample sending and sampling person leaves. After the gravity sensor is triggered, an alarm lamp in the inspection room flickers and gives out warning sound to remind an indoor inspector to sample; in the whole sample sending process, the contact between a sampling person and an inspection person is avoided, the risk of mutual greeting is avoided, and'sampling separation and blind sample detection 'is really realized.

Description

Technical Field

[0001] This invention relates to the field of grain sampling and testing, and more specifically to a grain sampling and testing sample delivery box and delivery method. Background Technology

[0002] In the grain purchasing industry, especially in the purchasing of bulk grains such as rice and wheat, sample collection and testing are core steps in controlling grain quality and determining purchase grades and prices. Currently, for grain purchasing depots that use mobile samplers, the sample transfer process generally follows the traditional model: after the depot keeper operates the mobile sampler to collect the grain sample, they must personally deliver the sample to the testing laboratory, where inspectors will conduct quality tests on the sample (such as testing for moisture, impurities, and bulk density).

[0003] In this traditional process, the core method of sample handover is that "the sampling personnel directly enter the testing laboratory and hand over the samples to the testing personnel in person." This method is simple to operate and requires no additional equipment, making it a long-standing standard practice in the industry, especially in small and medium-sized grain purchasing depots or traditional purchasing points, where its application is more widespread.

[0004] The shortcomings of existing technology;

[0005] As the grain purchasing industry places increasing demands on the impartiality of quality control and the standardization of processes, as well as on the management of personnel contact risks, the aforementioned traditional sample transfer methods have gradually revealed insurmountable technical defects, as detailed below:

[0006] (1) The inability to achieve "separation of sampling and inspection, and blind sample testing" poses a risk to the impartiality of inspection: "Separation of sampling and inspection, and blind sample testing" is a key principle to ensure the objectivity and impartiality of grain inspection results. Its core requirement is that sampling personnel and inspection personnel have no direct contact, and inspection personnel cannot know the source of the sample or the information of the sampling personnel in advance, so as to avoid human intervention in the inspection results. However, in the traditional method, sampling personnel and inspection personnel need to meet face to face, which can easily lead to direct communication (such as greetings, hints about the source of the sample, etc.), causing "blind sample testing" to become a mere formality, and the impartiality of the inspection results is difficult to guarantee. For example, there may be cases where unqualified grain is mistakenly judged as qualified due to personnel communication, or qualified grain is deliberately downgraded, which seriously affects the quality control of grain purchase and damages the legitimate rights and interests of farmers or purchasing enterprises.

[0007] (2) Direct contact between personnel poses safety and management risks:

[0008] On the one hand, sampling personnel need to enter the testing laboratory to complete the handover, which increases the frequency of personnel movement in the testing laboratory. If other precision testing operations are carried out in the testing laboratory at the same time, frequent personnel entry and exit may interfere with the testing environment (such as affecting temperature and humidity, introducing impurities, etc.), thereby affecting the testing accuracy. On the other hand, in scenarios where personnel cross-contact needs to be controlled (such as influenza prevention and control, dust pollution prevention and control, etc.), direct contact handover will increase health and safety risks or occupational health risks, which does not meet the safety management requirements of modern grain procurement.

[0009] (3) The lack of an effective reminder mechanism for sample handover affects testing efficiency:

[0010] In the traditional method, after the sampling personnel deliver the samples to the testing laboratory, the testing personnel need to "instantly notice" or "actively inquire" to complete the sample acceptance. If the testing personnel are busy (such as handling other sample testing, recording data, etc.), they may miss the opportunity to hand over the samples, resulting in sample backlog or transmission delays, which in turn affects the overall testing efficiency and slows down the grain procurement progress.

[0011] Needs to improve existing technologies:

[0012] Currently, there is no effective solution in the industry to address the above-mentioned defects: ordinary sample boxes only have storage functions and cannot achieve "one-sided door opening and locking" to prevent personnel contact; although delivery boxes in the logistics field have isolation functions, they lack a gravity sensing reminder mechanism adapted to the transfer of grain samples, and their locking structure cannot meet the core requirement of "forced locking on the other side when one side is opened", making it difficult to be directly applied to grain inspection scenarios.

[0013] Therefore, the current grain purchasing industry urgently needs a sample transfer device that can achieve "contactless handover between sampling personnel," "one-sided door opening and locking," and "instant reminder of sample receipt" to overcome the shortcomings of traditional methods, truly realize "sampling separation and blind sample testing," ensure the impartiality of inspection, and at the same time improve sample transfer efficiency and safety management level—this is also the core technical background and industry demand proposed in this invention. Summary of the Invention

[0014] Therefore, in order to overcome the above-mentioned shortcomings, the present invention provides a grain sampling and separation sample delivery box and delivery method.

[0015] This invention is implemented as follows: a grain sample delivery box for testing and separation is constructed, characterized in that: the delivery box comprises a sample delivery box body installed at the delivery window, with opening and closing doors installed on the inner and outer sides of the sample delivery box body, forming double doors on the inner and outer sides; a gravity sensor plate is provided on the lower side of the sample delivery box body, and an alarm light matching the gravity sensor plate is installed on the sample delivery box body.

[0016] According to the present invention, a grain sample delivery box for testing and separation is characterized in that: both the inner and outer opening and closing doors adopt an electromagnetic locking mode, and when the outer opening and closing door is opened, the inner opening and closing door is locked; the opening method can be a button switch or an automatic sensor opening; the alarm can only be triggered inside after the sample delivery personnel place the sample and close the side opening and closing door; a 12V radar intelligent human infrared sensor switch is installed on the outside of the sample delivery box (1), which can sense angles of 120 degrees and has an adjustable sensing distance of 0-8 meters; the sample delivery personnel must leave before the testing personnel can open the box door.

[0017] According to the present invention, a grain sample delivery box for testing and separation is characterized in that: the sample delivery box has doors on both sides and is installed on the wall of the testing room, using an electromagnetic locking mechanism. When one side door is open, the other side door is energized and locked (12-volt safety voltage), with a suction force of approximately 120 kg, making it impossible to open; the lower side of the box has a gravity sensor plate. When the person delivering the sample places the grain sample on the gravity sensor plate inside the box, the gravity sensor is triggered, and the alarm light in the testing room will flash and emit a warning sound to remind the inspector in the room to take the sample; the entire sample delivery process avoids contact between the sample delivery personnel and the testing personnel.

[0018] A method for delivering a grain sample separation delivery box according to the above-mentioned method is characterized in that: the delivery method is based on the above-mentioned "grain sample separation delivery box", which includes a sample delivery box body installed at the delivery window of the testing room, with electromagnetic locks controlling the opening and closing of doors on the inner and outer sides of the box body, a gravity sensor plate installed on the lower side of the box body, and an alarm light (including audible and visual warning function) linked to the gravity sensor plate installed on the outer side of the box body or the inner side of the testing room; the method avoids direct contact with personnel through a closed-loop process of "single-side door opening and locking - gravity-triggered alarm - contactless handover", and realizes "blind sample detection" through blind sample number management. The specific steps are as follows:

[0019] 1.1 Preparation stage before delivery:

[0020] 1.1.1 Equipment Status Check: Before the start of each day's acquisition, the inspection personnel shall check the status of the delivery box—ensure that both the inner and outer doors are closed and locked (the electromagnetic lock is powered by default, and the 12-volt safety voltage maintains the lock), the gravity sensor plate is not covered by foreign objects, and the alarm light is in standby mode (no flashing, no warning sound). If there are any abnormalities (such as the door is not locked or the alarm light is faulty), it shall be repaired in time until it is normal.

[0021] 1.1.2 Preparation of blind sample label: After the sampling personnel complete the grain sampling (such as rice sample, the sample amount is 500-1000g / sample) using a mobile sampler, the sample is put into a sealed sample bag and only labeled with a random blind sample number (without identifiable information such as the sampling personnel or storage location). The sealed bag must be tightly affixed with the number label to prevent it from falling off or the information from being tampered with.

[0022] 1.2 Sampling personnel submitting samples:

[0023] 1.2.1 Outer door opening operation: The sampling personnel carry the sealed blind sample to the testing window of the testing room and start the electromagnetic lock unlocking procedure of the outer door by using the door opening trigger device (such as a button or induction switch) on the outside of the delivery box. At this time, the outer electromagnetic lock is de-energized and unlocked, while the inner electromagnetic lock remains energized and locked (the suction force is about 120kg and cannot be opened manually), ensuring that the testing personnel cannot access the outer operating area.

[0024] 1.2.2 Sample Placement and Alarm Trigger: The sampling personnel open the outer door (the door can be opened by a button switch or an automatic sensor), place the sealed blind sample stably on the gravity sensor plate on the lower side of the box, and close the side door; after the sample is placed, the gravity sensor plate detects the pressure signal and immediately sends a trigger command to the alarm light. The alarm light on the inside of the test chamber starts to flash (e.g., a red LED light, flashing frequency 1 time / second) and emits a warning sound (volume 60-80 decibels, to avoid interfering with the test operation), prompting the test personnel to receive the sample; a 12V radar intelligent human infrared sensor switch is installed on the outside of the sample delivery box (1), which can sense angles of 120 degrees and has an adjustable sensing distance of 0-8 meters. The sample delivery personnel must leave before the test personnel can open the box door;

[0025] 1.2.3 Closing and locking of the outer door: After the sampling personnel confirm that the sample is placed securely, they close the outer door. At this time, the outer electromagnetic lock is automatically powered on and reset to lock (12-volt safety voltage), completing the delivery operation. The sampling personnel do not need to enter the testing room and can leave the delivery window directly.

[0026] 1.3 Sample Receiving Stage for Inspectors:

[0027] 1.3.1 Alarm Response and Inner Door Opening: After hearing / seeing the alarm light, the inspection personnel go to the delivery box and activate the electromagnetic lock unlocking procedure of the inner door by opening the inner door. At this time, the inner electromagnetic lock is de-energized and unlocked (the inner door can also be opened by a button switch or automatic sensor opening). The outer electromagnetic lock remains energized and locked (the suction force is about 120kg, which cannot be opened by the sampling personnel), forming a physical isolation.

[0028] 1.3.2 Sample Receiving and Blind Sample Testing: Inspectors open the inner door, remove the sealed blind sample from the box, verify the blind sample number (only the number is recorded, without any associated sampling information), and then close the inner door (the inner electromagnetic lock automatically resets and locks when powered on). Inspectors carry the blind sample to the testing area and complete the grain quality testing (such as moisture, impurities, bulk density, etc.) according to the standard procedure. During the testing process, the sample is identified only by the blind sample number, thus achieving "blind sample testing".

[0029] 1.4 Equipment reset stage:

[0030] 1.4.1 Alarm Light Reset: After the inspector removes the sample, the pressure signal of the gravity sensor plate disappears, the alarm light automatically stops flashing and the warning sound stops, and it returns to standby mode; if the alarm light does not reset automatically, the alarm can be manually turned off using the reset button on the inside.

[0031] 1.4.2 Preparation for Cyclic Use: After the equipment is reset, both the inner and outer opening and closing doors remain in a powered and locked state, waiting for the next sample delivery. No additional operation is required, enabling continuous cyclic use.

[0032] The grain sampling and separation method of the present invention brings the following beneficial effects:

[0033] I. Thoroughly ensure the impartiality of grain inspection and eliminate the risk of human intervention:

[0034] This method directly addresses the core pain point of "intervention due to contact by inspection personnel" in traditional sample transfer through a dual mechanism of "physical isolation + blind sample management":

[0035] Physical isolation cuts off intervention channels: Relying on the "single-side opening electromagnetic lock" design of the delivery box (the inner side locks when the outer side opens, with a suction force of up to 120kg; the outer side locks when the inner side opens), sampling personnel and inspection personnel have no chance of meeting or communicating throughout the process, thus spatially eliminating human intervention behaviors such as "greeting or hinting at sample information"; Blind sample management ensures objective results: The method requires sampling personnel to only mark random blind sample numbers (without any information that can identify the source). When receiving samples, inspection personnel can only obtain the number and cannot associate it with information such as the sampling personnel or the location of the storage area, achieving 100% "blind sample testing". For example, in the application of rice procurement, all batch inspection results are free from disputes caused by human intervention, completely ensuring the fairness of both parties in the procurement process—preventing farmers' high-quality grain from being "downgraded and sold at a lower price" and preventing enterprises from suffering quality losses due to substandard grain "getting away with it".

[0036] II. Significantly reduces the risk of human contact and environmental pollution, safeguarding safety and health:

[0037] Reduce public health and occupational health risks:

[0038] No sampling personnel are required to enter the laboratory. During peak seasons for respiratory diseases such as influenza, this reduces the risk of personnel movement and cross-infection in the laboratory, which meets public health prevention and control requirements.

[0039] Dust is easily generated in grain storage areas (especially drying and storage areas). In traditional methods, sampling personnel bring dust into the testing laboratory, which contaminates the testing environment. This method avoids dust diffusion by "window delivery", which not only reduces the amount of dust inhaled by the testing personnel (protecting occupational health), but also reduces the wear and tear on precision testing equipment caused by dust, indirectly ensuring the accuracy of test results.

[0040] Maintaining a clean environment in the laboratory: Reduced personnel movement makes it easier to maintain the temperature, humidity, and cleanliness of the laboratory, avoiding environmental fluctuations caused by frequent personnel movement (such as affecting moisture test results), and further improving the reliability of test data.

[0041] III. Significantly improve sample transfer efficiency and alleviate bottlenecks during peak purchasing season:

[0042] In traditional sample transfer methods, samplers must wait for testing personnel to become available before handing over samples in person, taking 5-8 minutes per batch (including waiting time). During peak seasons, this can easily lead to sample backlogs and long queues at farmers' homes. This method achieves a significant efficiency breakthrough through a "gravity-sensing automatic alarm" mechanism.

[0043] After the sampling personnel place the sample, the gravity sensor panel triggers the alarm light to flash and the warning sound to be heard. The inspection personnel can respond and receive the information immediately without waiting.

[0044] The entire process of "delivery and receipt" for a single batch of samples takes ≤2 minutes, which is more than 30% more efficient than the traditional method. During the peak season of rice harvest (with a peak daily sample volume of over 200 batches), "zero backlog" processing can be achieved, avoiding farmers' dissatisfaction due to long waiting times. At the same time, it can speed up the overall procurement progress in the storage area and reduce the risk of grain mold and loss due to procurement delays (especially for high moisture rice).

[0045] IV. Effectively reduce management and operating costs and improve resource utilization efficiency:

[0046] Reduce manpower and dispute resolution costs:

[0047] Traditional methods require dedicated personnel to coordinate the handover time between sampling and testing personnel. This method's standardized process (equipment verification - blind sample labeling - delivery - receipt - reset) requires no dedicated personnel intervention, saving the labor costs of 1-2 coordinators.

[0048] Blind sample testing reduces the quality dispute rate by more than 90%, and reduces the "re-testing costs" and "communication and coordination time" caused by disputes (such as repeated testing and multiple negotiations when farmers question the results).

[0049] Reduce equipment and site costs:

[0050] The core components of the delivery box (electromagnetic lock, gravity sensor plate) use a safe 12-volt voltage, with a daily power consumption of ≤0.5 kWh, resulting in extremely low energy consumption. Furthermore, there are no complex or easily damaged parts, requiring only one basic inspection per week (such as locking suction and alarm functions), making maintenance costs far lower than those of precision testing equipment.

[0051] The delivery box is installed directly at the window of the inspection room, without taking up additional storage or inspection room space. It is especially suitable for the needs of small and medium-sized collection points (with limited space) and improves the utilization rate of site resources.

[0052] Reduce personnel training costs: The operation process is highly standardized, the equipment buttons and labels are clear (such as the outer door opening trigger button and the inner reset button), and there is no need to master complex technical principles. Sampling personnel (most of whom are warehouse keepers and not professional technicians) and inspection personnel only need 15 minutes of basic training to operate proficiently. New employees can complete the entire process independently in as little as 1 hour, which greatly reduces the company's training investment.

[0053] V. Adaptable to various scenarios, with broad promotional flexibility:

[0054] Adaptable to different grain varieties: The trigger threshold of the gravity sensor plate can be adjusted according to the grain variety (50g for small particle samples, such as wheat and rice; 100g for large particle samples, such as corn and soybeans). Without modifying the core structure of the equipment, it can meet the sample delivery needs of various bulk grains.

[0055] Adaptable to different sized storage areas:

[0056] Large storage areas can install delivery boxes at multiple windows in the testing laboratory to enable parallel delivery of multiple batches of samples and cope with peak demand.

[0057] A single delivery box in a small storage area can meet the processing needs of 50-100 batches per day. Moreover, no changes to the building structure are required during installation (only a fixed window is needed). The investment cost is low, the implementation is easy, and it is convenient to promote and apply it in various grain purchasing points across the country.

[0058] VI. Supporting national food security management and strengthening the quality traceability defense line:

[0059] Grain quality is a crucial aspect of national food security. This method provides key support for security control through "non-intrusive precision testing."

[0060] Screening for substandard grains: Authentic and reliable inspection data can promptly identify substandard grains such as moldy, high-impurity, and high-moisture grains, preventing them from entering the processing stage (causing food safety risks) or the storage stage (leading to heat generation, spoilage, and increased losses).

[0061] Guiding scientific storage and transportation: Accurate quality data (such as moisture grade and bulk density) can serve as the basis for zoning and transportation of grain (such as prioritizing the drying of high-moisture grains and storing high-quality grains separately) to reduce storage losses.

[0062] Supporting the quality traceability system: Blind sample numbering and inspection data can form a complete record, providing a reliable data source for the "inspection link" of the national grain quality traceability system, helping to achieve full-process quality control "from field to table" and strengthening the national food security defense line. Attached Figure Description

[0063] Figures 1-2 This is a schematic diagram of the outer side of the grain sample collection and separation box.

[0064] Figures 3-4 This is a schematic diagram of the inner side of the grain sample collection and testing box.

[0065] Figure 5 This is a schematic diagram of the internal structure of the grain sample collection and separation box used in this application.

[0066] The components include: 1. Sample delivery box; 2. Opening and closing door; 3. Electromagnetic lock; 4. Gravity sensor plate; 5. Alarm light. Detailed Implementation

[0067] The following will be combined with the appendix Figures 1-5 This invention will be described in detail, and the technical solutions in the embodiments of this invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0068] In grain purchasing, in warehouses using mobile samplers, the warehouse keeper takes samples and delivers them to the testing laboratory. The common practice is to deliver the samples directly to the inspectors upon entering the testing laboratory. This process involves direct contact between the sampler and the inspector, which poses a potential risk and fails to truly achieve "separation of sample taking and testing, and blind sample testing".

[0069] This invention provides a grain sample delivery box for separation and testing, such as... Figures 1-5 As shown, it can be implemented in the following manner: The sample delivery box consists of a sample delivery box 1 installed at the sample delivery window, with opening and closing doors 2 installed on the inner and outer sides of the sample delivery box 1, forming double doors on the inner and outer sides; a gravity sensor plate 4 is provided on the lower inner side of the sample delivery box 1, and an alarm light 5 matching the gravity sensor plate 4 is installed on the sample delivery box 1.

[0070] Both the inner and outer opening and closing doors 2 adopt electromagnetic locking. When the outer opening and closing door 2 is opened, the inner opening and closing door 2 is locked. The door can be opened by a button switch or by automatic induction. The alarm will only be triggered after the sample delivery personnel place the sample and close the side opening and closing door. A 12V radar intelligent human infrared sensor switch is installed on the outside of the sample delivery box 1. It can sense angles of 120 degrees and the sensing distance is adjustable from 0 to 8 meters. The sample delivery personnel must leave before the inspection personnel can open the box door.

[0071] Usage effect: The equipment has been tested and used in the rice purchasing process. After the sampling personnel have completed the sampling, they send the sample through the "sample delivery box for sample testing and inspection" installed in the inspection room. The inspection personnel receive the sample through the equipment. During the delivery process, the delivery box can only be opened on one side, avoiding direct contact between the sampling personnel and the inspection personnel, avoiding the risk of mutual communication, and truly realizing "sample testing and inspection separation and blind sample testing".

[0072] Technical Principle: The "Sample Delivery Box" has doors on both sides and is installed on the wall of the testing room. It uses an electromagnetic locking system; when one door is open, the other door is energized and locked (12-volt safety voltage), generating approximately 120kg of suction force, making it impossible to open. The bottom of the box has a gravity sensor. When the sampler places the grain sample onto the gravity sensor, the sensor is triggered, causing alarm light 5 in the testing room to flash and sound an alarm, alerting the inspector to take the sample. The entire sample delivery process avoids contact between the sampler and the inspector.

[0073] The following is a detailed description of a method for delivering grain sample separation for testing according to this application; 1. Technical Field:

[0075] This delivery method involves sample transfer technology in the grain purchasing field, specifically applied to grain purchasing warehouses (such as bulk grain purchasing points for rice, wheat, corn, etc.) that use mobile samplers. It achieves contactless sample handover between samplers and inspectors through standardized operations, and fundamentally solves the problem of "separation of sample collection and inspection, and blind sample testing". It is applicable to various grain quality testing scenarios that require ensuring the impartiality of inspection.

[0076] 2. Method Overview:

[0077] This method is based on a "grain sample delivery box for separation and testing." The box includes a sample delivery container installed at the testing window of the laboratory. Electromagnetic locks control the opening and closing of the doors on both the inner and outer sides of the container. A gravity sensor is installed on the lower inner side of the container. An alarm light (including audible and visual warning functions) linked to the gravity sensor is installed on the outer side of the container or the inner side of the testing room. The method avoids direct human contact through a closed-loop process of "single-side door opening and locking - gravity-triggered alarm - contactless handover." It also achieves "blind sample testing" through blind sample numbering management. The specific steps are as follows.

[0078] 3. Specific operating steps:

[0079] 3.1 Pre-delivery preparation stage

[0080] 3.1.1 Equipment Status Check: Before the start of each day's acquisition, the inspection personnel shall check the status of the delivery box—ensuring that both the inner and outer doors are closed and locked (the electromagnetic lock is powered on by default, and the 12-volt safety voltage maintains the lock), the gravity sensor plate is not covered by foreign objects, and the alarm light is in standby mode (no flashing, no warning sound). If any abnormality is found (such as the door is not locked or the alarm light is faulty), it shall be repaired in time until it is normal.

[0081] 3.1.2 Preparation of blind sample labeling: After the sampling personnel complete the grain sampling (such as rice sample, sample amount 500-1000g / sample) using a mobile sampler, the sample is placed in a sealed sample bag and only labeled with a random blind sample number (without identifiable information such as the sampling personnel or storage location). The sealed bag must be tightly affixed with the number label to prevent it from falling off or the information from being tampered with.

[0082] 3.2 Sample delivery stage by sampling personnel

[0083] 3.2.1 Outer door opening operation: The sampling personnel carry the sealed blind sample to the testing window of the testing room and start the electromagnetic lock unlocking procedure of the outer door by using the door opening trigger device (such as a button or induction switch) on the outside of the delivery box. At this time, the outer electromagnetic lock is de-energized and unlocked, while the inner electromagnetic lock remains energized and locked (with a suction force of about 120kg, which cannot be opened manually), ensuring that the testing personnel cannot access the outer operating area.

[0084] 3.2.2 Sample Placement and Alarm Trigger: The sampling personnel open the outer door (the door can be opened by a button switch or an automatic sensor), place the sealed blind sample stably on the gravity sensor plate on the lower side of the box, and close the side door; after the sample is placed, the gravity sensor plate detects the pressure signal and immediately sends a trigger command to the alarm light. The alarm light on the inner side of the test chamber starts to flash (such as a red LED light, flashing frequency 1 time / second) and emits a warning sound (volume 60-80 decibels, to avoid interfering with the test operation), prompting the test personnel to receive the sample; a 12V radar intelligent human infrared sensor switch is installed on the outside of the sample delivery box (1), which can sense angles of 120 degrees and has an adjustable sensing distance of 0-8 meters. The sample delivery personnel must leave before the test personnel can open the box door.

[0085] 3.2.3 Closing and Locking of Outer Door: After confirming that the sample is placed securely, the sampling personnel close the outer door. At this time, the outer electromagnetic lock is automatically powered on and reset to lock (12-volt safety voltage), completing the delivery operation. The sampling personnel do not need to enter the testing room and can leave the delivery window directly.

[0086] 3.3 Sample Receiving Stage by Inspectors

[0087] 3.3.1 Alarm Response and Inner Door Opening: After hearing / seeing the alarm light, the inspection personnel go to the delivery box and activate the electromagnetic lock unlocking procedure of the inner door through the inner door opening trigger device. At this time, the inner electromagnetic lock is de-energized and unlocked, while the outer electromagnetic lock remains energized and locked (the suction force is about 120kg, and the sampling personnel cannot open it), thus forming physical isolation.

[0088] 3.3.2 Sample Receiving and Blind Sample Testing: The inspector opens the inner door, takes out the sealed blind sample from the box, verifies the blind sample number (only the number is recorded, without any associated sampling information), and then closes the inner door (the inner electromagnetic lock is automatically powered on and reset to lock). The inspector carries the blind sample to the testing area and completes the grain quality testing (such as moisture, impurities, bulk density, etc.) according to the routine procedure. During the testing process, the sample is identified only by the blind sample number, thus achieving "blind sample testing".

[0089] 3.4 Equipment Reset Stage

[0090] 3.4.1 Alarm Light Reset: After the inspector removes the sample, the pressure signal of the gravity sensor plate disappears, the alarm light automatically stops flashing and the warning sound stops, and the system returns to standby mode; if the alarm light does not reset automatically, the alarm can be manually turned off using the reset button on the inside.

[0091] 3.4.2 Preparation for Cyclic Use: After the equipment is reset, both the inner and outer opening and closing doors remain in a powered and locked state, waiting for the next sample delivery. No additional operation is required, enabling continuous cyclic use.

[0092] 4. Key Technical Details

[0093] 4.1 Electromagnetic lock linkage control: The electromagnetic locks of the inner and outer opening and closing doors of the delivery box adopt interlocking logic, that is, when one door is unlocked and opened, the other door is forcibly energized and locked (12-volt safety voltage, 120kg suction force). The signal synchronization is achieved through the circuit control module, eliminating the risk of personnel contact caused by the simultaneous opening of both doors.

[0094] 4.2 Gravity Sensor Trigger Accuracy: The trigger threshold of the gravity sensor plate can be adjusted according to the grain type (e.g., 50g for small particle samples and 100g for large particle samples) to ensure stable alarm triggering for different grain samples, while avoiding false triggering by light foreign objects such as dust and debris. 4.3 Blind Sample Numbering Management: Blind sample numbers use a "random letter + number" combination (e.g., A-20250901-001). The numbering rules are only known to the quality control personnel in the purchasing warehouse. Neither the sampling personnel nor the inspection personnel know the source of the sample corresponding to the number, thus completely realizing "blind sample testing."

[0095] 5. Verification of Usage Effect

[0096] This method has been practically applied in rice purchasing depots, processing 300 batches of rice samples over 15 consecutive days. The results show:

[0097] Personnel contact rate: There is no direct contact between sampling personnel and testing personnel, reducing the contact rate to 0 and avoiding the risk of human intervention such as "greeting in advance";

[0098] Blind sample testing success rate: 100% of batches were tested using blind sample numbers, and there were no disputes in the test results due to human intervention;

[0099] Operational efficiency: The time for single batch sample delivery and reception is ≤2 minutes, which is 30% more efficient than traditional face-to-face handover, and there is no sample backlog.

[0100] 6. Precautions

[0101] 6.1 The delivery box needs to be checked regularly (e.g., once a week) to check the electromagnetic lock's suction force and the accuracy of the gravity sensor plate to avoid functional failure due to component aging;

[0102] 6.2 The sample sealing bag should be made of wear-resistant and waterproof material to prevent damage during delivery that could lead to grain leakage and affect the triggering of the gravity sensor;

[0103] 6.3 Blind sample numbering must be managed by designated personnel, and the numbering records must be stored in encrypted form to avoid information leakage and damage to the "blind sample testing" principle.

[0104] The following section elaborates on the social benefits and practical value of the grain sample testing and separation method.

[0105] I. Social benefits;

[0106] 1. Ensure fairness in grain procurement and safeguard the legitimate rights and interests of farmers and enterprises;

[0107] In traditional sample transfer processes, direct contact between sampling and testing personnel can easily lead to human intervention, resulting in substandard grains being "qualified" and high-quality grains being "downgraded," harming farmers' income or enterprises' quality control rights. This method, through "one-sided door isolation + blind sample numbering management," achieves zero contact between sampling and testing personnel, with test results only linked to the blind sample number, completely eliminating channels for "personal influence." In practical application during rice procurement, 100% of batches have undergone blind sample testing, with no quality disputes arising from human intervention. This effectively ensures fair transactions for both parties, especially protecting small farmers from the risk of "weak bargaining power," and maintaining the stability of the grain procurement market.

[0108] 2. Reduce the risk of contact with infected individuals and safeguard public health and occupational health;

[0109] On the one hand, during peak seasons for respiratory diseases such as influenza, this method eliminates the need for sampling personnel to enter the laboratory, reducing personnel movement and the risk of cross-infection, thus meeting public health prevention and control requirements. On the other hand, grain purchasing warehouses (especially drying and storage areas) are prone to dust generation. If sampling personnel bring dust into the laboratory, it will contaminate the testing environment. This method avoids dust diffusion by delivering the sample through a window, protecting the occupational health of testing personnel (reducing dust inhalation) and reducing the wear and tear on precision testing equipment, thereby indirectly ensuring the accuracy of test results.

[0110] 3. Promote the standardization and upgrading of the grain industry and enhance its credibility;

[0111] For a long time, the grain inspection process has suffered from a lack of transparency and non-standard procedures, leading to skepticism about the industry's credibility. This method transforms the concept of "separation of sampling and testing, and blind sample testing" into a standardized, implementable process—clearly defining operational standards for all stages, including equipment verification, blind sample labeling, and delivery and reception. Key nodes (such as electromagnetic lock interlocks and gravity sensor alarms) are traceable (e.g., alarm records are verifiable). This standardized model can be replicated and promoted to other grain procurement scenarios, such as wheat and corn, driving the entire grain inspection industry from "experience-based operations" to "standardized management," enhancing consumer trust in grain quality, and strengthening the industry's overall credibility.

[0112] 4. To assist in national food security management and build a solid defense line for food quality;

[0113] Grain quality is a crucial aspect of national food security. If substandard grain enters the market or storage stages due to inspection intervention, it could lead to food safety risks (such as processing moldy grain) or storage losses (such as high-moisture grain causing heat and spoilage). This method ensures the accuracy and reliability of grain quality data for each batch through non-intrusive, precise inspection. On the one hand, it can promptly screen out moldy, high-impurity, and other substandard grains, preventing them from reaching the processing stage. On the other hand, accurate quality data provides a scientific basis for grain storage and transportation (such as zoned storage according to moisture levels), reducing storage losses. In the long run, this method provides reliable data support for the "inspection stage" of the national grain quality traceability system, helping to strengthen the food security defense line.

[0114] II. Use Value

[0115] 1. Improve sample transfer efficiency and accelerate grain procurement;

[0116] In traditional methods, sampling personnel must wait for testing personnel to become available before handing over samples in person. The handover time for a single batch of samples often reaches 5-8 minutes (including waiting time), and sample backlog is prone to occur during peak periods. This method, through "gravity-sensor automatic alarm," allows testing personnel to respond instantly to sample reception, and the time for a single batch of delivery and reception is ≤2 minutes, improving efficiency by more than 30% compared to traditional methods. During peak rice purchasing seasons (such as the autumn harvest), more than 200 batches of samples can be processed daily without sample backlog, avoiding farmers queuing to deliver samples and bottlenecks in the storage area, effectively accelerating the overall purchasing progress and reducing the time costs incurred by farmers due to waiting.

[0117] 2. Reduce management and maintenance costs and improve resource utilization efficiency;

[0118] (1) Reduce human resources and dispute costs;

[0119] Traditional methods require dedicated personnel to coordinate the handover time between sampling and testing, and manpower is needed to handle disputes arising from quality issues (such as verification and communication when farmers question the test results). This standardized process eliminates the need for dedicated personnel, and blind sample testing reduces quality disputes by more than 90%, indirectly lowering manpower management and dispute resolution costs (such as verification testing fees and communication time).

[0120] (2) Reduce equipment and site costs;

[0121] In terms of equipment, the core components of the delivery box (electromagnetic lock, gravity sensor plate) use a safe 12-volt voltage, have low energy consumption (average daily power consumption ≤0.5 kWh), and have no complex or easily damaged parts. Only one basic inspection is required per week, and the maintenance cost is far lower than that of precision testing equipment. In terms of site, the delivery box is directly installed at the window of the inspection room, without occupying additional storage area or inspection room space. It is especially suitable for the actual needs of small and medium-sized collection points (with limited space), and improves the utilization rate of site resources.

[0122] 3. Simple and easy to operate, reducing personnel training costs;

[0123] This method features a highly standardized operating procedure and equipment designed to suit real-world usage scenarios: the outer door opening trigger (button / sensor switch) and inner reset button are clearly labeled, and the gravity sensor alarm provides both audible and visual alerts (to prevent omissions). Whether sampling personnel (mostly warehouse keepers, not technical professionals) or inspection personnel, only 15 minutes of basic training is required to master the operation; no complex technical principles are needed. In rice purchasing warehouses, new employees can independently complete sample delivery or receipt within as little as one hour, significantly reducing personnel training costs for enterprises and minimizing equipment malfunctions or process delays caused by unfamiliarity with operation.

[0124] 4. Adaptable to various scenarios, offering broad application flexibility;

[0125] (1) Grain variety adaptation; the trigger threshold of the gravity sensor plate can be adjusted according to the grain variety (50g for small particle samples and 100g for large particle samples), which can meet the feeding needs of fine grains such as rice and wheat, and can also be adapted to coarse grain samples such as corn and soybeans, without having to adjust the core structure of the equipment due to the change of variety.

[0126] (2) Adaptable to storage area size; For large storage areas, delivery boxes can be installed in multiple windows of the testing room to enable parallel delivery of multiple batches of samples; For small storage areas, a single delivery box can meet the daily sample processing needs of 50-100 batches, and the equipment installation does not require modification of the building structure (only fixed windows are needed), adapting to the usage scenarios of storage areas of different sizes and having extremely strong promotion flexibility.

[0127] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A grain sample collection and separation box, characterized in that; The delivery box consists of a sample delivery box (1) installed at the delivery window, with opening and closing doors (2) installed on the inside and outside of the sample delivery box (1), forming double doors on the inside and outside sides; a gravity sensor plate (4) is provided on the lower inside of the sample delivery box (1), and an alarm light (5) matching the gravity sensor plate (4) is installed on the sample delivery box (1).

2. The grain sampling and separation sample delivery box according to claim 1, characterized in that; Both the inner and outer opening and closing doors (2) adopt the electromagnetic locking mode. When the outer opening and closing door (2) is opened, the inner opening and closing door (2) is locked. The opening method can be a button switch or an automatic sensor opening. The alarm can only be triggered inside after the sample delivery personnel place the sample and close the side opening and closing door. A 12V radar intelligent human infrared sensor switch is installed on the outside of the sample delivery box (1). It can sense the angle of 120 degrees and the sensing distance is adjustable from 0 to 8 meters. The sample delivery personnel must leave before the inspection personnel can open the box door.

3. The grain sampling and separation sample delivery box according to claim 1, characterized in that; The sample delivery box has doors on both sides and is installed on the wall of the testing room. It uses an electromagnetic locking mode. When one side is open, the other side is powered on and locked (12-volt safety voltage). With a suction force of about 120kg, it cannot be opened. The bottom of the box is a gravity sensor plate. When the sampler places the grain sample on the gravity sensor plate inside the box, the gravity sensor will be triggered and the alarm light (5) in the testing room will flash and emit a warning sound to remind the inspector in the room to take the sample. The entire sample delivery process avoids contact between the sampler and the inspector.

4. A method for delivering a grain sampling and separation sample delivery box according to claim 1, characterized in that; This delivery method is based on the aforementioned "grain sample delivery box for testing and separation". The delivery box includes a sample delivery box body installed at the testing window of the testing room. The inner and outer sides of the box body are equipped with electromagnetic locks to control the opening and closing of the doors. A gravity sensor plate is installed on the lower side of the box body. An alarm light (including audible and visual warning function) linked to the gravity sensor plate is installed on the outer side of the box body or the inner side of the testing room. The method avoids direct contact with personnel through a closed-loop process of "single-side door opening and locking - gravity-triggered alarm - contactless handover". At the same time, "blind sample testing" is achieved through blind sample numbering management. The specific steps are as follows. 1.1 Preparation stage before delivery: 1.1.1 Equipment Status Check: Before the start of each day's acquisition, the inspection personnel shall check the status of the delivery box—ensure that both the inner and outer doors are closed and locked (the electromagnetic lock is powered by default, and the 12-volt safety voltage maintains the lock), the gravity sensor plate is not covered by foreign objects, and the alarm light is in standby mode (no flashing, no warning sound). If there are any abnormalities (such as the door is not locked or the alarm light is faulty), it shall be repaired in time until it is normal. 1.1.2 Preparation of blind sample label: After the sampling personnel complete the grain sampling (such as rice sample, the sample amount is 500-1000g / sample) using a mobile sampler, the sample is put into a sealed sample bag and only labeled with a random blind sample number (without identifiable information such as the sampling personnel or storage location). The sealed bag must be tightly affixed with the number label to prevent it from falling off or the information from being tampered with. 1.2 Sampling personnel submitting samples: 1.2.1 Outer door opening operation: The sampling personnel carry the sealed blind sample to the testing window of the testing room and start the electromagnetic lock unlocking procedure of the outer door by using the door opening trigger device (such as a button or induction switch) on the outside of the delivery box. At this time, the outer electromagnetic lock is de-energized and unlocked, while the inner electromagnetic lock remains energized and locked (the suction force is about 120kg, which cannot be opened manually), ensuring that the testing personnel cannot access the outer operating area. 1.2.2 Sample Placement and Alarm Trigger: The sampling personnel open the outer door (the door can be opened by a button switch or an automatic sensor), place the sealed blind sample stably on the gravity sensor plate on the lower side of the box, and close the side door; after the sample is placed, the gravity sensor plate detects the pressure signal and immediately sends a trigger command to the alarm light. The alarm light on the inner side of the test chamber starts to flash (such as a red LED light, flashing frequency 1 time / second) and emits a warning sound (volume 60-80 decibels, to avoid interfering with the test operation), prompting the test personnel to receive the sample; a 12V radar intelligent human infrared sensor switch is installed on the outside of the sample delivery box (1), which can sense angles of 120 degrees and has an adjustable sensing distance of 0-8 meters. The sample delivery personnel must leave before the test personnel can open the box door; 1.2.3 Closing and Locking of Outer Door: After confirming that the sample is placed securely, the sampling personnel close the outer door. At this time, the outer electromagnetic lock is automatically energized and reset to lock (12-volt safety voltage), completing the delivery operation. The sampling personnel do not need to enter the testing room and can leave the delivery window directly. 1.3 Sample Receiving Stage for Inspectors: 1.3.1 Alarm Response and Inner Door Opening: After hearing / seeing the alarm light, the inspection personnel go to the delivery box and activate the electromagnetic lock unlocking procedure of the inner door by opening the inner door. At this time, the inner electromagnetic lock is de-energized and unlocked (the inner door can also be opened by a button switch or automatic sensor opening), while the outer electromagnetic lock remains energized and locked (the suction force is about 120kg, which cannot be opened by the sampling personnel), forming a physical isolation. 1.3.2 Sample Receiving and Blind Sample Testing: The inspector opens the inner door, takes out the sealed blind sample from the box, verifies the blind sample number, and then closes the inner door (the inner electromagnetic lock is automatically powered on and reset). The inspector carries the blind sample to the testing area and completes the grain quality testing (such as moisture, impurities, bulk density, etc.) according to the standard procedure. During the testing process, the sample is identified only by the blind sample number, thus achieving "blind sample testing". 1.4 Equipment reset stage: 1.4.1 Alarm Light Reset: After the inspector removes the sample, the pressure signal of the gravity sensor plate disappears, the alarm light automatically stops flashing and the warning sound stops, and it returns to standby mode; if the alarm light does not reset automatically, the alarm can be manually turned off using the reset button on the inside. 1.4.2 Preparation for Cyclic Use: After the equipment is reset, both the inner and outer opening and closing doors remain in a powered and locked state, waiting for the next sample delivery. No additional operation is required, enabling continuous cyclic use.

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