CN-121994639-A - Full-automatic food ash content tester and working method thereof

CN121994639ACN 121994639 ACN121994639 ACN 121994639ACN-121994639-A

Abstract

The invention relates to the technical field of food detection and analysis, and discloses a full-automatic food ash content tester and a working method thereof. The machine body is provided with a translation driving cavity, a high-temperature processing cavity, a detection operation cavity and an operation cavity, the sample bearing unit comprises a mechanical arm, a sample rack and a crucible positioning structure and is used for automatically transferring samples, the heating unit comprises a heating platform, a weight sensor, a step heating module and an internal camera, visual monitoring and accurate temperature control are achieved, the weighing unit and the cooling unit are symmetrically arranged to finish accurate weighing and constant-temperature cooling, the control unit coordinates the linkage of the units, and the carbonization end point is automatically judged and the ash content is calculated based on real-time weight data. The invention is based on full-automatic design and intelligent control, and the detection efficiency, the result accuracy and the operation safety are obviously improved.

Inventors

XU WENYUAN
XU LAN
YANG QINGQING
ZHANG QIN
FANG CAN
ZHOU XUAN
ZHANG XIAOTIAN
WEN SHENG
PENG FEI
LU TAO
LIU XIAOFANG
LI YONGGANG
TANG LIN
Yang Rongjiao

Assignees

湖北省疾病预防控制中心（湖北省预防医学科学院）

Dates

Publication Date: 20260508
Application Date: 20251225

Claims (10)

1. The full-automatic food ash content tester is characterized by comprising a machine body, a sample bearing unit, a heating unit, a weighing unit, a cooling unit and a control unit; The machine body is internally provided with a translation driving cavity, a high-temperature processing cavity, a detection operation cavity and an operation cavity, wherein the sample bearing unit is fixedly arranged in the translation driving cavity, the heating unit is arranged in the high-temperature processing cavity in a sealing way, the weighing unit and the cooling unit are symmetrically arranged at two side stations of the detection operation cavity, and the control unit is embedded in the operation cavity and exposes an operation interface; The sample bearing unit comprises a mechanical arm, a sample frame and a crucible positioning structure, wherein the mechanical arm is fixedly connected with the inner wall of the translation driving cavity based on a driving module, the sample frame is detachably connected with the execution end of the mechanical arm, and the crucible positioning structure array is arranged on the outer top surface of the sample frame; The heating unit comprises a heating platform with a transparent observation window, the heating platform is integrated with a weight sensor, and the heating unit is further provided with a step heating module with controllable program and an internal camera, wherein the internal camera is arranged corresponding to the transparent observation window; Each unit is electrically connected with the control unit based on a wire, and the weighing unit, the weight sensor of the heating unit and the internal camera are additionally connected with the control unit based on a communication bus in a data transmission mode.
2. The full-automatic food ash content analyzer according to claim 1, wherein the driving module of the sample carrying unit comprises a stepping motor, a ball screw and a guiding sliding rail, the mechanical arm is configured as a multi-degree-of-freedom mechanical arm, the execution end of the mechanical arm is configured with an elastic clamping structure, and the elastic clamping structure is adapted to the shape of the crucible positioning structure and is used for clamping the sample crucible to realize stable transfer.
3. The full-automatic food ash content analyzer according to claim 1, wherein the crucible positioning structure comprises an anti-slip limit groove and an elastic compression piece, the inner diameter of the anti-slip limit groove is in clearance fit with the outer diameter of the sample crucible, the elastic compression piece is symmetrically arranged on the inner wall of the limit groove, an RFID tag groove is arranged at the bottom of the limit groove, the sample carrying unit further comprises an RFID card reader, the RFID card reader is arranged on the side surface of the executing end of the mechanical arm and is in communication connection with the control unit, and the RFID card reader is used for reading sample information and correlating with the transferring action of the mechanical arm.
4. The full-automatic food ash content analyzer according to claim 1, wherein the heating unit further comprises a muffle furnace body, a silicon carbide rod heating element, a K-type thermocouple temperature sensor and a heat insulation cavity, wherein an electric translation furnace door is arranged at a feed inlet of the muffle furnace body and is electrically connected with the control unit based on an electromagnetic driving piece and linked with a transferring action of a mechanical arm, when the mechanical arm transfers a crucible to a station of the heating unit, the electric translation furnace door is automatically opened, the crucible is automatically closed after being placed on a heating platform, the internal camera is fixed at a side wall mounting opening of the muffle furnace body corresponding to a transparent observation window, the step heating module is electrically connected with the silicon carbide rod heating element, and the weight sensor is integrated below a bearing surface of the heating platform.
5. The full-automatic food ash analyzer according to claim 1, wherein an algorithm module is built in the step heating module, heating power is adjusted based on a PID algorithm, the algorithm module is in signal interaction with a control unit and is used for simulating a preset optimal carbonization curve and preventing samples from splashing based on adjusting power output of a silicon carbide rod heating element, the control unit is used for calculating a weight loss rate of the samples based on real-time weight data acquired by a weight sensor, when the weight loss rate is reduced to a preset threshold value, the control unit is used for judging a carbonization end point, and the control unit automatically sends an instruction to terminate the carbonization process.
6. The full-automatic food ash content analyzer according to claim 1, wherein the weighing unit comprises a high-precision electronic balance, a wind-proof dust cover and an electromagnetic control opening and closing door, the shape and the size of a side opening of the wind-proof dust cover are configured to allow an execution end of the mechanical arm to go in and out without obstacle, and an opening signal of the electromagnetic control opening and closing door is triggered by the control unit according to a displacement signal of the mechanical arm, so that synchronous action of the opening and closing door when the mechanical arm takes and puts a crucible is ensured.
7. The full-automatic food ash content analyzer according to claim 1, wherein the cooling chamber of the cooling unit is provided with a feeding opening adapted to the execution end of the mechanical arm, the cooling chamber is internally provided with a crucible supporting table, the interval of the crucible supporting table is configured to correspond to the interval of the crucible positioning structure array on the sample rack, and the heat insulation layer of the inner wall of the cooling chamber extends to the edge of the feeding opening to avoid temperature fluctuation in the chamber during the transfer process of the mechanical arm.
8. The full-automatic food ash content analyzer according to claim 1, wherein the control unit comprises a displacement control module, the displacement control module is electrically connected with a driving module of the mechanical arm and is used for presetting a transfer path and positioning accuracy of the mechanical arm, the positioning accuracy is high, and the residence time of the mechanical arm in the stations of the weighing unit, the heating unit and the cooling unit is dynamically adjusted by the control unit according to the working state of each unit.
9. The full-automatic food ash content analyzer according to claim 1, further comprising an exhaust gas treatment unit, wherein the exhaust gas treatment unit comprises an activated carbon adsorption tank and an air duct, the air duct is disposed along a side wall of the machine body, the activated carbon adsorption tank is fixed at a mounting position on a side surface of the machine body, an air inlet of the activated carbon adsorption tank is communicated with an air outlet of the heating unit based on the air duct, and the air outlet extends to the outside of the machine body.
10. A method for operating a fully automatic food ash meter according to any of claims 1-9, comprising the steps of: correspondingly placing a crucible filled with food samples in a crucible positioning structure of a sample carrier unit sample rack, inputting sample parameters based on an operation interface of a control unit, and finishing measurement preparation; the control unit sends a transfer instruction to the sample bearing unit, the mechanical arm moves to a sample frame station according to a preset path, the crucible is grabbed based on the elastic clamping structure, the crucible is transferred into a wind-proof dust-proof cover of the weighing unit, the electromagnetic control opening and closing door is synchronously opened and closed, and the electronic balance acquires initial mass data of a sample and transmits the initial mass data to the control unit for storage; After the initial weighing is completed, the mechanical arm transfers the crucible to a heating unit, the heating unit carries out step heating and ashing treatment according to a preset program, and the control unit judges the carbonization end point based on real-time weight data; After the ashing treatment is finished, the electric translation furnace door is automatically opened again, the mechanical arm stretches into the muffle furnace body to grab the crucible and transfers the crucible to the cooling cavity of the cooling unit, the feeding opening of the cooling cavity is adapted to the movement track of the mechanical arm, the mechanical arm places the crucible on the crucible supporting table and then withdraws, and the cooling unit starts a constant-temperature drying and cooling program; After cooling is finished, the crucible is grabbed by the mechanical arm and transferred to the weighing unit, the electromagnetic control opening and closing door is synchronously opened and closed, and the electronic balance acquires ashed residue mass data and transmits the ashed residue mass data to the control unit; And the control unit automatically calculates ash content of the sample according to a preset formula according to the collected initial mass data and residue mass data, and the result display, storage and derivation are completed.

Description

Full-automatic food ash content tester and working method thereof Technical Field The invention relates to the technical field of food detection and analysis, in particular to a full-automatic food ash content analyzer and a working method thereof. Background The food ash is used as a core index for reflecting the content of inorganic mineral matters in food, is an important basis for evaluating the purity, the nutritive value and the rationality of the processing technology of the food, and is widely applied to the quality detection field of various foods such as grains, grease, dairy products, fruits and vegetables. At present, the main flow technology of food ash content determination is a muffle furnace burning method, and the core flow comprises sample pretreatment, accurate weighing, carbonization treatment, high-temperature ashing, constant-temperature cooling and residue weighing, and the detection is mainly completed by adopting equipment such as a traditional manual operation muffle furnace, a semi-automatic tester and the like in the prior art, and the part of semi-automatic equipment integrates a simple sample transfer mechanism, but links such as carbonization process regulation and control, end point judgment and the like of the core still depend on traditional control logic and manual assistance. The prior art has the defects that firstly, the control of the carbonization process is lack of precision, the prior equipment mostly adopts a fixed-rate heating or simple sectional heating mode, characteristics of different food samples are not combined to simulate an optimal carbonization curve, so that samples are easy to splash in the rapid heating process, sample loss and detection result deviation are caused, secondly, the carbonization end judgment subjectivity is strong, the traditional method relies on operators to observe smoke emission conditions or set carbonization time according to experience, quantitative monitoring indexes are lacked, and weight change of the samples cannot be captured in real time, the carbonization end of 'smokeless' is difficult to accurately judge, the problems of incomplete carbonization or excessive carbonization are easy to occur, thirdly, the process monitoring and visualization are lacked, the prior heating unit is of a closed structure, a transparent observation window and an internal camera are not arranged, the carbonization and ashing state of the samples cannot be observed in real time, the abnormal conditions are difficult to intervene in time, fourthly, the automatization and the synergic are insufficient, the semi-automatization equipment still needs to manually participate in sample transfer, parameter adjustment and other operations, the environmental temperature and humidity change, the human operation error influence the detection precision is easy to influence, meanwhile, the carbonization and incineration, the incineration and the incineration state are easy to be easily treated, or the waste gas is easy to be discharged, the intelligent control is based on the conditions, and the problems of the intelligent control are poor in the control and the control of the environment protection and the control is based on the conditions, and the control of the measurement and the conditions are rough and the conditions. Therefore, a full-automatic food ash analyzer integrating a program-controllable step heating module, a weight real-time monitoring system, a visual monitoring device and a full-automatic cooperative transfer mechanism is needed, so as to solve the pain point in the prior art and improve the accuracy, the automation level and the operation safety of food ash measurement. Disclosure of Invention In view of the above, the invention provides a full-automatic food ash content analyzer and a working method thereof, and aims to solve the problems of inaccurate regulation and control, subjectivity in end point judgment, process monitoring deficiency, low automation degree, safety, environmental protection and the like in the prior art, thereby causing the problems of low detection efficiency, poor result consistency and higher operation risk. The invention provides a full-automatic food ash content analyzer and a working method thereof, wherein the full-automatic food ash content analyzer comprises a machine body, a sample bearing unit, a heating unit, a weighing unit, a cooling unit and a control unit; The machine body is internally provided with a translation driving cavity, a high-temperature processing cavity, a detection operation cavity and an operation cavity, wherein the sample bearing unit is fixedly arranged in the translation driving cavity, the heating unit is arranged in the high-temperature processing cavity in a sealing way, the weighing unit and the cooling unit are symmetrically arranged at two side stations of the detection operation cavity, and the control unit is embedded in the operation cavity and exposes an operation interf