阅读说明：本技术 基于主动标识的生产管理方法、系统、设备及存储介质 (Production management method, system, equipment and storage medium based on active identification ) 是由 张清柱 张桂林 于 2021-09-18 设计创作，主要内容包括：本发明提供一种基于主动标识的生产管理方法、系统、设备及存储介质,其中,方法包括：获取工艺标识,根据工艺标识从生产工艺文件包中获取生产工艺,生产工艺中包括携带有要素标识编码的若干生产要素；获取生产要素对应的要素标识编码,根据要素标识编码获取生产要素信息,综合所有的生产要素信息,获取生产工艺参数；根据预设规则对所述生产工艺参数进行匹配校验,判断生产工艺进程是否存在异常；若生产工艺进程存在异常,则发出报警信号；若生产工艺进程不存在异常,则根据生产工艺参数生成工艺数据快照,并进行存储。本发明能够实现低成本的生产工艺精细化管理,提高了生产效率,同时根据工艺数据快照能够实现产品生产参数的回溯和数据分析。(The invention provides a production management method, a system, equipment and a storage medium based on active identification, wherein the method comprises the following steps: acquiring a process identifier, acquiring a production process from a production process file package according to the process identifier, wherein the production process comprises a plurality of production elements carrying element identifier codes; acquiring element identification codes corresponding to production elements, acquiring production element information according to the element identification codes, and integrating all production element information to acquire production process parameters; matching and checking the production process parameters according to a preset rule, and judging whether the production process is abnormal or not; if the production process is abnormal, an alarm signal is sent out; and if the production process does not have abnormity, generating a process data snapshot according to the production process parameters, and storing the process data snapshot. The invention can realize low-cost production process fine management, improve the production efficiency, and simultaneously can realize the backtracking and data analysis of the production parameters of the product according to the process data snapshot.)

1. A production management method based on active identification is characterized by comprising the following steps:

acquiring a process identifier, and acquiring a production process from a production process file package according to the process identifier, wherein the production process comprises a plurality of production elements carrying element identifier codes, and the production elements comprise procedures, equipment, products, production materials and process parameters;

acquiring element identification codes corresponding to the production elements, acquiring production element information according to the element identification codes, and integrating all the production element information to acquire production process parameters;

matching and checking the production process parameters according to a preset rule, and judging whether the production process is abnormal or not;

if the production process is abnormal, an alarm signal is sent out;

and if the production process does not have abnormity, generating a process data snapshot according to the production process parameters, and storing the process data snapshot.

2. The active identification-based production management method according to claim 1, wherein before the acquiring the process identification, the method further comprises:

applying for obtaining enterprise nodes from a secondary node, and configuring corresponding identification codes according to the enterprise nodes;

generating element identification codes corresponding to the production elements according to the identification codes and preset coding rules, and associating the element identification codes with the corresponding production elements;

and storing a plurality of production processes in the production process file package, wherein one production process corresponds to a plurality of production elements, a plurality of element identification codes are obtained according to the production elements in the production process, and the element identification codes are associated with the process identification.

3. The active identification-based production management method according to claim 2, wherein the acquiring element identification codes corresponding to the production elements, acquiring element information according to the element identification codes, and integrating all production element information to acquire production process parameters specifically comprises:

acquiring element identification codes of the production elements through an acquisition terminal arranged on equipment;

analyzing the element identification code to obtain the production element information;

and acquiring production process parameters according to all the production element information in the production process.

4. The active identification-based production management method according to claim 3, wherein the automatically analyzing the element identification code to obtain the production element information specifically comprises:

after the acquisition terminal acquires the element identification code, sending an analysis request of the element identification code to a current secondary node;

if the element identification code belongs to the current secondary node, sending the analysis request to a corresponding enterprise node;

if the element identification code does not belong to the current secondary node, the analysis request is sent to a recursion node, the recursion node forwards the analysis request to a corresponding target secondary node, and the target secondary node sends the analysis request to a corresponding enterprise node;

and the enterprise node analyzes the element identification code, acquires production element information and sends the production element information to the acquisition terminal.

5. The active identification based production management method according to claim 3, wherein after acquiring production process parameters according to all production element information in the production process, the method further comprises:

packaging element identification codes corresponding to all production element information to form a new product identification code;

and sending the product identification code and all corresponding element identification codes to an enterprise node, performing identification registration, and establishing a data snapshot of the product.

6. The active identification-based production management method according to claim 1, wherein the matching verification of the production process parameters according to preset rules to determine whether the production process is abnormal specifically comprises:

acquiring all historical parameters of the production process, and determining the normal working parameter range of the production process according to all the historical parameters;

extracting keywords from the historical parameters and the production process parameters respectively to obtain historical keywords and current keywords;

according to the historical keywords and the current keywords, matching and checking the historical parameters and the production process parameters, and judging whether the production process parameters are in a parameter range;

if all the production process parameters are in the parameter range, determining that no abnormity exists in the production process;

and if at least one production process parameter is not in the parameter range, determining that the production process is abnormal.

7. The active identification-based production management method according to claim 1, wherein if there is no abnormality in the production process, generating a process data snapshot according to the production process parameters, and after storing the process data snapshot, further comprising:

and processing the production process parameters, and analyzing weak links in the production process by combining an equipment fault model, a capacity statistic model and a production efficiency model.

8. A production management system based on active identification, comprising:

the production process acquisition module is used for acquiring a process identifier and acquiring a production process from a production process file package according to the process identifier, wherein the production process comprises a plurality of production elements carrying element identifier codes, and the production elements comprise procedures, equipment, products, production materials and process parameters;

the process parameter acquisition module is used for acquiring element identification codes corresponding to the production elements, acquiring production element information according to the element identification codes, and integrating all the production element information to acquire production process parameters; the production process judgment module is used for carrying out matching verification on the production process parameters according to a preset rule and judging whether the production process is abnormal or not;

the alarm signal sending module is used for sending an alarm signal when the production process is abnormal;

and the data snapshot generating module is used for generating a process data snapshot according to the production process parameters and storing the process data snapshot when the production process is not abnormal.

9. An apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method of any of claims 1 to 7 are implemented when the computer program is executed by the processor.

10. A storage medium having a computer program stored thereon, the computer program, when being executed by a processor, realizing the steps of the method of any one of claims 1 to 7.

Technical Field

The invention relates to the technical field of industrial internet, in particular to a production management method, a system, equipment and a storage medium based on active identification.

Background

The industrial internet is a brand new industrial ecology, key infrastructure and novel application mode which are deeply integrated by a new generation of information communication technology and industrial economy, and is usually completed by combining an identification analysis system, wherein the identification analysis system is a key 'nervous system' of the industrial internet. The identification application is divided into static identification application and active identification application, the static identification application takes two-dimensional codes, radio frequency identification codes (RFID), near field communication identifiers (NFC) and the like as carriers, and information is acquired by means of recognition software and hardware such as a code scanning gun or a scanning function of a payment bank; the active identification application actively sends an analysis request to the analysis node by a network through embedding the identification in the chip, the communication module and the terminal without the help of external equipment.

However, in the prior art, the production process is mainly managed by people, and because the equipment identification code is not standard and data acquisition is difficult, the production management cost of an enterprise in the production process is high, and the fine management of the production process is difficult to realize.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a production management method, system, device and storage medium based on active identification.

A production management method based on active identification comprises the following steps: acquiring a process identifier, and acquiring a production process from a production process file package according to the process identifier, wherein the production process comprises a plurality of production elements carrying element identifier codes, and the production elements comprise procedures, equipment, products, production materials and process parameters; acquiring element identification codes corresponding to the production elements, acquiring production element information according to the element identification codes, and integrating all the production element information to acquire production process parameters; matching and checking the production process parameters according to a preset rule, and judging whether the production process is abnormal or not; if the production process is abnormal, an alarm signal is sent out; and if the production process does not have abnormity, generating a process data snapshot according to the production process parameters, and storing the process data snapshot.

In one embodiment, before the obtaining the process identifier and obtaining the production process from the production process file package according to the process identifier, the method further includes: applying for obtaining enterprise nodes from a secondary node, and configuring corresponding identification codes according to the enterprise nodes; generating element identification codes corresponding to the production elements according to the identification codes and preset coding rules, and associating the element identification codes with the corresponding production elements; and storing a plurality of production processes in the production process file package, wherein one production process corresponds to a plurality of production elements, a plurality of element identification codes are obtained according to the production elements in the production process, and the element identification codes are associated with the process identification.

In one embodiment, the obtaining of the element identification code corresponding to the production element, obtaining element information according to the element identification code, and integrating all production element information to obtain production process parameters specifically includes: acquiring element identification codes of the production elements through an acquisition terminal arranged on equipment; analyzing the element identification code to obtain the production element information; and acquiring production process parameters according to all the production element information in the production process.

In one embodiment, the automatically analyzing the element identifier code to obtain the production element information specifically includes: after the acquisition terminal acquires the element identification code, sending an analysis request of the element identification code to a current secondary node; if the element identification code belongs to the current secondary node, sending the analysis request to a corresponding enterprise node; if the element identification code does not belong to the current secondary node, the analysis request is sent to a recursion node, the recursion node forwards the analysis request to a corresponding target secondary node, and the target secondary node sends the analysis request to a corresponding enterprise node; and the enterprise node analyzes the element identification code, acquires production element information and sends the production element information to the acquisition terminal.

In one embodiment, after acquiring the production process parameters according to all the production factor information in the production process, the method further includes: packaging element identification codes corresponding to all production element information to form a new product identification code; and sending the product identification code and all corresponding element identification codes to an enterprise node, performing identification registration, and establishing a data snapshot of the product.

In one embodiment, the matching and checking the production process parameters according to a preset rule to determine whether the production process is abnormal specifically includes: acquiring all historical parameters of the production process, and determining the normal working parameter range of the production process according to all the historical parameters; extracting keywords from the historical parameters and the production process parameters respectively to obtain historical keywords and current keywords; according to the historical keywords and the current keywords, matching and checking the historical parameters and the production process parameters, and judging whether the production process parameters are in a parameter range; if all the production process parameters are in the parameter range, determining that no abnormity exists in the production process; and if at least one production process parameter is not in the parameter range, determining that the production process is abnormal.

In one embodiment, if there is no exception in the production process, after generating a process data snapshot according to the production process parameter and storing the process data snapshot, the method further includes: and processing the production process parameters, and analyzing weak links in the production process by combining an equipment fault model, a capacity statistic model and a production efficiency model.

An active identification based production management system comprising: the production process acquisition module is used for acquiring a process identifier and acquiring a production process from a production process file package according to the process identifier, wherein the production process comprises a plurality of production elements carrying element identifier codes, and the production elements comprise procedures, equipment, products, production materials and process parameters; the process parameter acquisition module is used for acquiring element identification codes corresponding to the production elements, acquiring production element information according to the element identification codes, and integrating all the production element information to acquire production process parameters; the production process judgment module is used for carrying out matching verification on the production process parameters according to a preset rule and judging whether the production process is abnormal or not; the alarm signal sending module is used for sending an alarm signal when the production process is abnormal; and the data snapshot generating module is used for generating a process data snapshot according to the production process parameters and storing the process data snapshot when the production process is not abnormal.

An apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the active identification based production management method described in the various embodiments above when executing the program.

A storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the active identification based production management method described in the various embodiments above.

Compared with the prior art, the invention has the advantages and beneficial effects that:

1. the invention can realize the fine management of the production process, improve the production efficiency, and simultaneously can realize the backtracking and data analysis of the production parameters of the product according to the process data snapshot. The invention realizes the automatic analysis of the element identification codes in the production process, realizes the fine management of the production process and reduces the cost by unifying the coding standard; the backtracking of the production process of the product is realized through the data snapshot, the reason is quickly analyzed and positioned, and the fault influence range is narrowed.

2. According to the invention, weak links in the production process can be analyzed according to the data snapshot, so that the production process is optimized in a targeted manner, and the production efficiency is improved.

Drawings

FIG. 1 is a schematic flow chart illustrating a method for active tag-based production management according to an embodiment;

FIG. 2 is a schematic diagram of an embodiment of an active identification based production management system;

fig. 3 is a schematic diagram of the internal structure of the apparatus in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings by way of specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In one embodiment, as shown in fig. 1, there is provided a production management method based on active identification, including the following steps:

step S101, acquiring a process identifier, and acquiring a production process from a production process file package according to the process identifier, wherein the production process comprises a plurality of production elements carrying element identifier codes, and the production elements comprise procedures, equipment, products, production materials and process parameters.

Specifically, the production of each product depends on a corresponding production process, each production process is provided with a corresponding process identifier, and the production process can be acquired from the production process file package according to the process identifier. Production elements such as working procedures, equipment, products, production materials, process parameters and the like are defined in the production process, the production elements correspond to unique element identification codes, and the element identification codes are associated with the process identifications, so that all the production elements in one production process can be obtained.

Step S102, obtaining element identification codes corresponding to the production elements, obtaining production element information according to the element identification codes, and integrating all the production element information to obtain production process parameters.

Specifically, an element identification code corresponding to the production element is obtained, and the production element information can be obtained according to the element identification code, so that all production element information in the production process is obtained, all production element information is integrated, production process parameters can be obtained, and whether the production process of the product is smooth or not can be checked according to the production process parameters.

And step S103, matching and checking the production process parameters according to a preset rule, and judging whether the production process is abnormal or not.

Specifically, after the production process parameters are obtained, the production process parameters can be matched and checked according to preset rules, and whether the production process is abnormal or not is judged, so that the problems of untimely and inaccurate data and the like caused by manual operation are solved, early warning can be timely carried out when the production process is abnormal, and the loss caused by production faults is reduced.

And step S104, if the production process is abnormal, an alarm signal is sent out.

Specifically, when the production process is judged to be abnormal according to the production process parameters, an alarm signal can be sent out in time, the production process can be checked in time, and larger loss is avoided.

And step S105, if the production process is not abnormal, generating a process data snapshot according to the production process parameters and storing the process data snapshot.

Specifically, when the production process is judged to be not abnormal according to the production process parameters, the production process data snapshot can be performed according to the production process parameters, corresponding element identification codes of all the production process parameters, such as equipment operation data, raw material data, process data, part data and the like, are packaged to form a new product identification code, and the registration of the product data is completed according to the product identification code, so that data support can be provided for backtracking of the production process of the product according to the production process data snapshot.

In the embodiment, a production process is obtained from a production process file package according to a process identifier by obtaining the process identifier, the production process comprises a plurality of production elements carrying element identifier codes, element identifier codes corresponding to the production elements are obtained, production element information is obtained according to the element identifier codes, production process parameters are obtained by combining all the production element information, matching and checking are carried out on the production process parameters according to preset rules, whether the production process is abnormal or not is judged, an alarm signal is sent out when the production process is abnormal, a process data snapshot is generated according to the production process parameters and stored when the production process is abnormal, fine management of the production process with low cost can be achieved, production efficiency is improved, and meanwhile, backtracking and data analysis of production parameters of products can be achieved according to the process data snapshot.

Before step S101, the method further includes: applying for obtaining enterprise nodes from the secondary nodes, and configuring corresponding identification codes according to the enterprise nodes; generating element identification codes corresponding to the production elements according to the identification codes and preset coding rules, and associating the element identification codes with the corresponding production elements; the production process file package is stored with a plurality of production processes, one production process corresponds to a plurality of production elements, a plurality of element identification codes are obtained according to the production elements in the production process, and the element identification codes are associated with the process identification.

Specifically, an enterprise can apply for obtaining enterprise nodes from secondary nodes, and configure corresponding identification codes according to the enterprise nodes, wherein the identification codes are usually obtained by adding enterprise self-defined identification suffixes on the basis of identification prefixes; generating unique element identification codes for production elements such as equipment, products, production materials, processes and the like according to the identification codes and preset coding rules, finishing the association of the element identification codes and the corresponding production elements through identification registration service, wherein common element identification code carriers comprise two-dimensional codes, radio frequency identification codes and the like, and a user can scan the element identification codes through an intelligent terminal such as a mobile phone and a code scanning gun so as to obtain the information of the production elements; and the element identification codes are associated with the process identification, so that the production elements in the production process can be obtained according to the process identification.

Taking the machining industry as an example, the identification non-coding suffix of a product consists of a product code, a batch number, a serial number and an extension code (optional). Wherein: CP3 represents a product code, PC4 represents a lot number, XH5 represents a serial number, and 001 represents an extension code.

Wherein, step S102 specifically includes: acquiring element identification codes of the production elements through an acquisition terminal arranged on equipment; analyzing the element identification code to obtain production element information; and acquiring production process parameters according to all production element information in the production process.

Specifically, in order to acquire parameters in the production process in real time, the element identification codes of the production elements can be acquired through the acquisition terminal, the element identification codes are analyzed, the production element information is acquired, the production process parameters are comprehensively acquired according to all the production element information in the production process, and the production process parameters are conveniently checked. The acquisition terminal is intelligent terminal hardware which is installed on production equipment and has data acquisition, calculation and transmission capabilities, and can actively analyze element identification codes and actively register element information.

After acquiring the element identification code, the acquisition terminal sends an analysis request of the element identification code to the current secondary node; if the element identification code belongs to the current secondary node, sending the analysis request to the corresponding enterprise node; if the element identification code does not belong to the current secondary node, sending the analysis request to a recursion node, forwarding the analysis request to a corresponding target secondary node by the recursion node, and sending the analysis request to a corresponding enterprise node by the target secondary node; and the enterprise node analyzes the element identification code, acquires production element information and sends the production element information to the acquisition terminal.

Specifically, after acquiring an element identification code, an acquisition terminal sends an analysis request of the element identification code to a current secondary node, when the element identification code belongs to a code registered by the current secondary node, a corresponding enterprise node is searched according to the element identification code, the analysis request is sent to the corresponding enterprise node, and the enterprise node analyzes the element identification code; when the element identification code does not belong to the current secondary point, the analysis request is sent to the recursion node, the recursion node searches and confirms the corresponding secondary node, the analysis request is forwarded to the corresponding target secondary node, the target secondary node sends the analysis request to the corresponding enterprise node, finally the element identification code is analyzed through the enterprise node, corresponding production element information is obtained, and the production element is sent to the acquisition terminal sending the request.

After the production process parameters are obtained according to all production element information in the production process, the method further comprises the following steps: packaging element identification codes corresponding to all production element information to form a new product identification code; and sending the product identification code and all corresponding element identification codes to the enterprise node, performing identification registration, and establishing a data snapshot of the product.

Specifically, after the production process parameters are acquired according to all production element information in the production process, element identification codes corresponding to all the production element information can be packaged to form a new product identification code, the product identification code and the corresponding element identification code are sent to an enterprise node, and identification registration is performed, so that a data snapshot in the production process of the product is established, and each parameter in the production process of the product can be traced back according to the product identification code.

Wherein, step S103 specifically includes: acquiring all historical parameters of the production process, and determining the normal working parameter range of the production process according to all the historical parameters; respectively extracting keywords from the historical parameters and the production process parameters to obtain historical keywords and current keywords; according to the historical keywords and the current keywords, matching and checking the historical parameters and the production process parameters, and judging whether the production process parameters are in the parameter range; if all the production process parameters are in the parameter range, determining that no abnormity exists in the production process; and if at least one production process parameter is not in the parameter range, determining that the production process is abnormal.

Specifically, all historical parameters of the production process are obtained, and the parameter range of normal operation of the production process is determined according to all the historical parameters, and of course, the parameter range in the normal operation state can also be preset; respectively extracting keywords from the historical parameters and the production process parameters to obtain historical keywords and current keywords; matching and checking the historical parameters and the production process parameters according to the historical keywords and the current keywords, and judging whether the production process parameters are in the parameter range, so as to determine whether the production process is normally carried out; when all production process parameters are in the parameter range, determining the sequence of the production process, and avoiding abnormality; when at least one production process parameter is not in the parameter range, the production process is determined to be abnormal, an alarm signal can be sent out, workers can conveniently and timely handle the abnormal production process, and loss caused by production faults is reduced.

After step S104, the method further includes: and processing the production process parameters, and analyzing weak links in the production process by combining an equipment fault model, a capacity statistic model and a production efficiency model.

Specifically, production process parameters are collected, processed and analyzed according to a big data technology, index data of multiple dimensions of the production process are generated by combining an equipment fault model, a capacity statistical model and a production efficiency model, weak links in the processing process of the production process are analyzed by comparing results of synchronization or circular comparison of the data, targeted upgrade and improvement on the weak links are facilitated, and production efficiency of enterprises is improved.

As shown in fig. 2, there is provided an active identification based production management system 20, comprising: a production process obtaining module 21, a process parameter obtaining module 22, a production process judging module 23, an alarm signal sending module 24 and a data snapshot generating module 25, wherein:

the production process acquisition module 21 is used for acquiring a process identifier and acquiring a production process from the production process file package according to the process identifier, wherein the production process comprises a plurality of production elements carrying element identifier codes, and the production elements comprise procedures, equipment, products, production materials and process parameters;

the process parameter acquisition module 22 is used for acquiring element identification codes corresponding to the production elements, acquiring production element information according to the element identification codes, and integrating all the production element information to acquire production process parameters;

the production process judging module 23 is used for performing matching verification on the production process parameters according to a preset rule and judging whether the production process is abnormal or not;

the alarm signal sending module 24 is used for sending an alarm signal when the production process is abnormal;

and the data snapshot generating module 25 is configured to generate a process data snapshot according to the production process parameters and store the process data snapshot when there is no abnormality in the production process.

In one embodiment, the process parameter obtaining module 22 is specifically configured to: acquiring element identification codes of the production elements through an acquisition terminal; analyzing the element identification code to obtain production element information; and acquiring production process parameters according to all production element information in the production process.

In one embodiment, the production process determining module 23 is specifically configured to: acquiring all historical parameters of the production process, and determining the normal working parameter range of the production process according to all the historical parameters; respectively extracting keywords from the historical parameters and the production process parameters to obtain historical keywords and current keywords; according to the historical keywords and the current keywords, matching and checking the historical parameters and the production process parameters, and judging whether the production process parameters are in the parameter range; if all the production process parameters are in the parameter range, determining that no abnormity exists in the production process; and if at least one production process parameter is not in the parameter range, determining that the production process is abnormal.

In one embodiment, a device is provided, which may be a server, and its internal structure diagram may be as shown in fig. 3. The device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the device is configured to provide computing and control capabilities. The memory of the device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the device is used for storing configuration templates and also can be used for storing target webpage data. The network interface of the device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method of active identification based production management.

Those skilled in the art will appreciate that the configuration shown in fig. 3 is a block diagram of only a portion of the configuration associated with the present application and does not constitute a limitation on the devices to which the present application may be applied, and that a particular device may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.

In one embodiment, a storage medium may also be provided, the storage medium storing a computer program comprising program instructions which, when executed by a computer, may be part of the above-mentioned active identification based production management system, cause the computer to perform the method according to the preceding embodiment.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.

It will be apparent to those skilled in the art that the modules or steps of the invention described above may be implemented in a general purpose computing device, they may be centralized on a single computing device or distributed across a network of computing devices, and optionally they may be implemented in program code executable by a computing device, such that they may be stored on a computer storage medium (ROM/RAM, magnetic disks, optical disks) and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and the practice of the invention is not to be considered limited to those descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.