CN108388219B - Workshop environment adjusting method and system - Google Patents
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- CN108388219B CN108388219B CN201810175804.3A CN201810175804A CN108388219B CN 108388219 B CN108388219 B CN 108388219B CN 201810175804 A CN201810175804 A CN 201810175804A CN 108388219 B CN108388219 B CN 108388219B
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- 230000005611 electricity Effects 0.000 claims abstract description 80
- 238000004519 manufacturing process Methods 0.000 claims abstract description 62
- 239000010985 leather Substances 0.000 claims abstract description 25
- 238000004458 analytical method Methods 0.000 claims abstract description 13
- 230000002159 abnormal effect Effects 0.000 claims abstract description 12
- 238000012360 testing method Methods 0.000 claims abstract description 7
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- 230000002194 synthesizing effect Effects 0.000 description 2
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- 208000027534 Emotional disease Diseases 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41865—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by job scheduling, process planning, material flow
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/32—Operator till task planning
- G05B2219/32252—Scheduling production, machining, job shop
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
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Abstract
A workshop environment adjusting method and an adjusting system are provided. The adjusting method comprises the following steps: providing a skin electricity sensing bracelet, wherein the skin electricity sensing bracelet is provided with a skin electricity sensor and a wireless module; in the testing stage, workers wear the leather-electricity testing bracelet when performing production operation in a workshop; a skin electric sensor of the skin electric sensing bracelet collects skin level data of workers; the management platform generates a skin-electricity curve wave according to the skin-electricity level data, and the skin-electricity curve wave is combined with the production speed and the first pass rate of workers for analysis; in the actual production stage, when workers carry out production operation in a workshop, the workers wear the leather electricity measuring bracelet, and when the leather electricity curve wave has abnormal waveform and the production rate and the through rate reach below the warning value, the leather electricity level adjusting scheme is implemented. The adjusting method can improve the working efficiency of workers timely and pertinently.
Description
Technical Field
The invention relates to the field of intelligent production, in particular to a workshop environment adjusting method and system.
Background
The workshop environment is relatively complex, and the workshop activities in a specific production field related to a plurality of activities comprise: equipment, production raw materials, semi-finished products, finished products and the like. The workshop environment influences the production efficiency of production personnel, and can cause the enterprise to provide economic benefits through improving the workshop environment.
Improving the workshop environment has become a consensus among many enterprises. However, when the workshop environment is improved, the reaction of the workers to the environment and the workers themselves are generally ignored, and the workshop entity environment is adjusted in an isolated manner, so that the adjustment timeliness and the adjustment effect are still deficient.
Disclosure of Invention
The invention aims to provide a workshop environment adjusting method and a workshop environment adjusting system, so that the workshop environment can be timely and pertinently adjusted according to the personal state of a worker, and the working efficiency of the worker is improved.
In order to solve the above problems, the present invention provides a method for adjusting a workshop environment, comprising: providing a skin electricity sensing bracelet, wherein the skin electricity sensing bracelet is provided with a skin electricity sensor and a wireless module; in the testing stage, workers wear the leather-covered electric sensing bracelet when performing production operation in a workshop; the skin electricity sensor of the skin electricity sensing bracelet collects skin electricity level data of workers and sends the skin electricity level data to a management platform through the wireless module; the management platform generates a skin electricity curve wave according to the skin electricity level data, the skin electricity curve wave is combined with the production speed and the straight-through rate of workers for analysis, the abnormal waveform and the normal waveform of the skin electricity curve wave are set according to the analysis result, the warning value of the production speed is set as a first warning value, and the warning value of the straight-through rate is set as a second warning value; in the actual production stage, when a worker carries out production operation in a workshop, the leather electricity level measuring bracelet is worn, when the leather electricity curve wave appears in the abnormal waveform, the production rate reaches below the first warning value, the first pass rate reaches below the second warning value, and the leather electricity level adjusting scheme is implemented.
Optionally, the production speeds and the first pass rates in different time periods are obtained, the production speeds and the first pass rates in different time periods are analyzed and compared to obtain work efficiency height distributions in different time periods, and different first warning values and different second warning values in different time periods are set according to the work efficiency height distributions in different time periods.
Optionally, when the normal waveform reappears in the picoelectrical curve wave, the production speed is greater than the first alarm value, and the first pass rate is greater than the second alarm value, the implementation of the picoelectrical level adjustment scheme is stopped.
Optionally, the adjusting method further includes: according to statistics and analysis of the skin-electricity curve waves of a plurality of days, work efficiency distribution of individuals and workshop teams in each time period in one day is obtained, and according to the work efficiency distribution in each time period in one day, production quantity and difficult and easy task arrangement of the individuals and the workshop teams are adjusted.
Optionally, the skin level adjustment scheme includes at least one of the following three schemes:
playing music at a first time in a workshop;
adjusting the temperature of the plant within a first temperature range;
and adjusting the illumination intensity of the workshop within the first illumination intensity range.
Optionally, the first time is 10 minutes; the first temperature range is the range of two degrees centigrade above and below the original temperature; the first illumination intensity range is 95% -105% of the original illumination intensity.
In order to solve the above problem, the present invention further provides a workshop environment adjusting system, including: the device comprises a leather electric sensing bracelet, a wireless module and a charging module, wherein the leather electric sensing bracelet is provided with a leather electric sensor, the wireless module and the charging module; the monitoring system is used for acquiring the production speed and the first pass rate; and the management platform is used for storing and analyzing the skin level data uploaded by the skin electric sensing bracelet.
Optionally, the adjusting system further includes: a temperature adjustment device; a brightness adjustment device; a loudspeaker.
Optionally, the wireless module is a bluetooth module; the regulating system further comprises a workshop control center.
Optionally, the skin electricity sensing bracelet further includes at least one of the following structures: an electric quantity indicator light; numbering; and a charging module.
In one technical scheme of the invention, a worker can work under the condition of wearing the leather electric sensing bracelet. The skin electricity sensor bracelet detects human skin electricity reaction level to through wireless communication's mode, upload the management platform with skin electricity sensor detection data. The management platform collects a large amount of skin level data to obtain the numerical values of the skin electric curve waves, and the data (numerical values) are used for synthesizing the skin electric curve waves. After the skin electricity curve wave exists, the working efficiency of the corresponding time period is known by combining the production speed and the direct communication of workers. And according to the working efficiency, the warning values of the related production speed (per capita production quantity) and the straight through rate can be set. And then, when the abnormal waveform appears in the skin electricity curve wave and the production rate and the straight-through rate reach the corresponding warning values or below, implementing a skin electricity level adjusting scheme, realizing timely and targeted improvement of the working environment and improving the working efficiency of workers.
Detailed Description
The improvement and regulation of the workshop environment, in addition to the improvement of the hardware conditions in isolation, also needs to be improved in a targeted manner in combination with the personal status of the staff. Therefore, the invention provides a workshop environment adjusting method and a workshop environment adjusting system, and the workshop environment can be adjusted timely and specifically.
The present invention is described in detail below for a more clear presentation.
The embodiment of the invention provides a workshop environment adjusting method.
The plant environment adjusting method at least comprises the steps of S1 to S3.
Step S1, providing a skin electricity sensing bracelet, wherein the skin electricity sensing bracelet at least comprises a skin electricity sensor and a wireless module.
The leather electric measuring bracelet is designed into a pattern convenient for workers to wear, and each leather electric measuring bracelet can be provided with a unique number. The wireless module can be a Bluetooth module or other wireless modules.
In this embodiment, the skin electrical sensing bracelet can also include the module of charging. The charging module guarantees that the leather electric sensing bracelet is chargeable, and the leather electric sensing bracelet can be provided with an electric quantity indicating lamp for displaying real-time residual electric quantity and the like.
The reason why this embodiment selects skin electricity and surveys bracelet is because the skin electricity belongs to the physiological change who is not controlled by people's consciousness to can better reflect staff's operating condition. Other such physiological changes that are not controlled by human consciousness also include changes in respiration rate and blood volume, among others. These physiological parameters (changes) that are not controlled by human consciousness are governed by the autonomic nervous system, and therefore are generally not controlled by human consciousness but change autonomously, and a series of conditioned reflex phenomena occur under external stimuli. Of these variations, the skin-electricity is more suitable for testing the working condition of the worker.
The skin electricity of a human body is influenced by three factors of temperature, human body activity and psychological reaction. The skin resistance and conductance of human body are changed with the change of skin sweat gland function, sweat gland secretion is increased under the condition of emotional stress, fear or anxiety, and skin surface sweat is increased, which causes the increase of conductivity and leads to the rise of skin electricity.
Further, factors that affect the basal level of the skin electricity include the level of arousal, body temperature, and physical activity.
With respect to the level of arousal, the palms and soles of the feet reflect particularly the level of arousal in the normal temperature range, and therefore these two areas are suitable sites for measuring galvanic skin response. There is evidence that skin levels are low while sleeping, but rise quickly upon awakening. Under hypnotic conditions, the skin electrical level also tends to decrease. Studies in Waller (Waller, 1919) and Wechsler (Wechsler, 1925) show that electrodermal levels are lower in the morning, culminating in the middle of the day, and decrease in the evening, with changes that appear to correspond to changes in operating efficiency over the course of the day.
With respect to body temperature: body skin conductance mainly reflects the body's temperature regulation mechanism. Therefore, when the temperature is high and the body needs to dissipate heat, the skin has high electric level due to perspiration; and when the temperature is low and the body needs to preserve heat, the skin electricity level is low. The human palms and soles are also involved in thermoregulation, but primarily in extreme air temperature conditions.
With respect to physical activity: when the subject is preparing for a task, the skin electrical level will gradually rise; when starting to engage in an activity, the skin level will rise correspondingly to a higher level; while the electrodermal level decreases at rest. If a less difficult task is performed for a long time, the galvanic skin level will slowly decrease, but for more difficult tasks, the change will not be obvious. Many psychological phenomena are closely related to the skin electrical level, and emotional reactions cause a sharp change in the skin electrical level. Wechsler (Wechsler, 1925) and Setz (Syz, 1926) studies have shown that words with emotional tone can induce a galvanic skin response, while repeated stimulation can reduce this response.
Due to the various properties of the bioelectricity, the method for testing the bioelectricity is adopted to reflect and know the working state of workers, and has scientific theoretical basis.
When the skin electricity sensor carries out skin electricity measurement, the resistance is taken as a quantitative unit in the adopted test method. The principle of a galvanic sensor consists of two parts: the first part, the wheatstone bridge, is used to adjust the scaled resistor to zero to cancel the unknown (i.e., the baseline) resistance, and then read the resistance from the scale of the resistor; the second part is to run an amplifier in the bridge to amplify the current variations.
According to the above, the skin electricity detection bracelet with the skin electricity sensor is adopted, so that the skin electricity of a worker can be sensed in real time, and the corresponding skin electricity can be tested, so that the working state of the worker can be reflected. In particular, how to apply the corresponding skin level data requires subsequent steps.
Step S2, in the testing stage, when workers carry out production operation in a workshop, the workers wear the leather-covered electric sensing bracelet; the skin electricity sensor of the skin electricity sensing bracelet collects skin electricity level data of workers and sends the skin electricity level data to a management platform through the wireless module; the management platform generates a skin electricity curve wave according to the skin electricity level data, the skin electricity curve wave is combined with the production speed and the straight through rate of workers for analysis, the abnormal waveform and the normal waveform of the skin electricity curve wave are set according to the analysis result, the warning value of the production speed is set as a first warning value, and the warning value of the straight through rate is set as a second warning value.
In step S2, the process of analyzing the skin electric curve wave in combination with the production speed and the through yield of the worker may be a corresponding mathematical modeling method or some existing algorithm. The result is a uniform link between the picocurve wave and the production speed and the through-output.
Step S3, in the actual production stage, when the staff carries out the production operation in the workshop, wear the leather electricity measuring bracelet, when the leather electricity curve wave appears the abnormal waveform, and the production rate reaches below the first warning value, the first pass rate reaches below the second warning value, the leather electricity level adjustment scheme is implemented.
As can be seen from the above step S3, the present embodiment implements the corresponding pico-level adjustment scheme only when three conditions occur simultaneously, which are: the skin electricity curve wave has the abnormal waveform; the production rate reaches below the first warning value; the first pass rate is below the second warning value.
In addition, in the present embodiment, the following steps may be included in addition to the steps S1 to S3.
Step S4, obtaining the production speed and the first pass rate in different time periods, analyzing and comparing the production speed and the first pass rate in different time periods to obtain the work efficiency height distribution in different time periods, and setting the first warning value and the second warning value in different time periods according to the work efficiency height distribution in different time periods.
The step S4 is to have different first and second warning values at different time intervals, so that the corresponding adjusting method is more humanized and reasonable, and is more helpful to scientifically improve the production efficiency of the worker.
And step S5, when the normal waveform reappears on the skin electric curve wave, the production speed is greater than the first alarm value, and the first pass rate is greater than the second alarm value, stopping implementing the skin electric level adjustment scheme.
Step S5 is to stop implementing the corresponding pico-cell level adjustment scheme in time, so that the whole adjustment method is more flexible and reasonable.
Step S6, the adjusting method further includes: according to statistics and analysis of the skin-electricity curve waves of a plurality of days, work efficiency distribution of individuals and workshop teams in each time period in one day is obtained, and according to the work efficiency distribution in each time period in one day, production quantity and difficult and easy task arrangement of the individuals and the workshop teams are adjusted.
Step S6 adopts more data, and the corresponding analysis result is closer to the actual situation, and on this basis, adjustment arrangement of throughput (workload) and difficult and easy tasks is performed, so that the corresponding adjustment method is more applicable to wider adjustment contents.
In this embodiment, the skin level adjustment scheme may include at least one of the following three schemes.
According to the scheme I, music at the first time is played in a workshop. Wherein the first time may be 10 minutes.
And secondly, regulating the temperature of the workshop within the first temperature range. The first temperature range can be two degrees centigrade above and below the original temperature.
And thirdly, adjusting the illumination intensity of the workshop within the first illumination intensity range. The first illumination intensity range is 95% -105% of the original illumination intensity.
The three schemes can adjust the working state of the staff, and the corresponding skin level data can be adjusted accordingly, so that the three schemes are used as specific skin level adjusting schemes. Specifically, at the beginning, the trial and error method, i.e., one of the schemes, can be adopted. After a period of data accumulation, it can be concluded under which specific circumstances and with which scheme to use.
In the method provided by this embodiment, the worker can work when wearing the skin-electric sensing bracelet, that is, the above step S1 is completed.
The skin electricity sensor bracelet detects human skin electricity reaction level to through wireless communication's mode (realized by wireless module), upload management platform with skin electricity sensor detection data. The management platform collects a large amount of skin level data to obtain the numerical values of the skin electric curve waves, and the data (numerical values) are used for synthesizing the skin electric curve waves. After the skin electricity curve waves exist, the production speed of workers can be obtained by combining the real-time production quantity of the workers. The real-time production quantity can be obtained by the corresponding monitoring system, that is, the corresponding production speed can be obtained by the monitoring system. Meanwhile, the high and low straight-through rate can be obtained by a monitoring system. After the skin electricity curve wave, the production speed and the first pass yield are obtained, the management platform can combine the skin electricity curve wave, the production speed and the first pass yield for analysis, and the working efficiency of the management platform in the corresponding time period can be obtained. For example, one of the analysis results shows that, in general, the higher the waveform of the electrodermal curve wave, the smaller the production quantity (i.e., the smaller the production speed), and the lower the straight through rate. And according to the working efficiency, the warning values of the related production speed (per capita production quantity) and the straight through rate can be set. At this time, the above steps S1 and S2 are completed.
In step S3, the setting of the recipe parameters and the recipe matching method are implicit. Firstly, the parameters of the scheme are that music is played for 10 minutes, the temperature of a workshop is adjusted within a range of two degrees centigrade, or the illumination intensity of the workshop is adjusted within a range of 95% -105%, and the like. The second scheme matching method is to trigger the implementation of the corresponding scheme, for example, when the waveform of the set picocurve wave is abnormal (i.e. abnormal high-low conditions of data), music is automatically played, or temperature is adjusted or brightness is adjusted, so as to achieve a better working efficiency environment.
In the step S3, when the abnormal waveform appears in the skin electric curve wave, and the production rate reaches below the first warning value, and the through rate reaches below the second warning value, a skin electric level adjustment scheme is implemented. In the whole process, the working environment is timely and purposefully improved, and the working efficiency of the working personnel can be improved by combining the steps S1 to S3.
The embodiment of the invention also provides a workshop environment adjusting system, which can be used for realizing the adjusting method (but the realization of the adjusting method is not limited to the adoption of the adjusting system).
The adjusting system comprises a leather electricity measuring bracelet, a monitoring system and a management platform.
The skin electroscope bracelet has skin electric sensor, wireless module and the module of charging. The skin electricity surveys bracelet can sense the skin electricity reaction change (when emotional state, the change such as the relaxation of blood vessel in the skin and sweat gland secretion can arouse the change of skin resistance), and corresponding skin electricity level data is sent for subsequent management platform after by skin electricity surveys bracelet sensing.
The monitoring system is used for acquiring the production speed and the straight through rate.
And the management platform is used for storing and analyzing the skin level data uploaded by the skin electricity sensing bracelet. Specifically, the management platform can manage information of workers and configuration of the bracelet, and can realize real-time data statistics. Furthermore, corresponding alert values (e.g., the first alert value and the second alert value in the aforementioned method) may also be set by the management platform. How the corresponding matching scheme is specifically matched (scheme parameters) can also be set by the management platform. Meanwhile, the management platform can record the collected skin level data in a curve ripple mode.
The adjusting system further comprises a temperature adjusting device, a brightness adjusting device and a loudspeaker. The temperature adjusting device, the brightness adjusting device and the speaker are used for implementing various pico-level adjusting schemes, and reference may be made to the corresponding contents of the foregoing method embodiments.
The regulating system further comprises a workshop control center. The workshop control center can be a small-sized control center, and data collected by the leather electric sensing bracelet can be uploaded to the management platform through the workshop control center in real time.
In this embodiment, the wireless module is a bluetooth module. Bluetooth is a wireless technology standard, the wave band is 2400 MHz-2483.5 MHz (including guard band), and the system has the characteristics of low cost, short transmission distance, low power consumption and the like, so the Bluetooth technology is suitable for the system of the embodiment. In other embodiments, other wireless technology modules may be used.
In this embodiment, the skin electrical sensing bracelet further includes at least one of the following structures: the corresponding properties and functions of the power indicator light, the number and the charging module can be referred to the corresponding contents of the foregoing regulating method embodiment.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A workshop environment adjusting method is characterized by comprising the following steps:
providing a skin electricity sensing bracelet, wherein the skin electricity sensing bracelet is provided with a skin electricity sensor and a wireless module;
in the testing stage, workers wear the leather-covered electric sensing bracelet when performing production operation in a workshop; the skin electricity sensor of the skin electricity sensing bracelet collects skin electricity level data of workers and sends the skin electricity level data to a management platform through the wireless module; the management platform generates a skin electricity curve wave according to the skin electricity level data, the skin electricity curve wave is combined with the production speed and the straight-through rate of workers for analysis, the abnormal waveform and the normal waveform of the skin electricity curve wave are set according to the analysis result, the warning value of the production speed is set as a first warning value, and the warning value of the straight-through rate is set as a second warning value;
in the actual production stage, when a worker carries out production operation in a workshop, the leather electricity level measuring bracelet is worn, the leather electricity curve wave appears in the abnormal waveform, the production speed reaches the lower part of the first warning value, the first pass rate reaches the lower part of the second warning value, and the leather electricity level adjusting scheme is implemented.
2. The adjustment method according to claim 1, wherein said production speed and said through-rate at different time intervals are obtained, said production speed and said through-rate at different time intervals are analyzed and compared to obtain a distribution of work efficiency at different time intervals, and different time intervals are set to have different said first warning value and said second warning value according to said distribution of work efficiency at different time intervals.
3. The method of adjusting according to claim 1, wherein the implementation of said picolevel adjustment scheme is stopped when said normal waveform reappears with said picocurve wave, said production speed is greater than said first alarm value, and said through-rate is greater than said second alarm value.
4. The adjustment method of claim 1, further comprising: according to statistics and analysis of the skin-electricity curve waves of a plurality of days, work efficiency distribution of individuals and workshop teams in each time period in one day is obtained, and according to the work efficiency distribution in each time period in one day, production quantity and difficult and easy task arrangement of the individuals and the workshop teams are adjusted.
5. The method of adjusting of claim 1, wherein the skin level adjustment protocol comprises at least one of the following three protocols:
playing music at a first time in a workshop;
adjusting the temperature of the plant within a first temperature range;
and adjusting the illumination intensity of the workshop within the first illumination intensity range.
6. The conditioning method according to claim 5, characterized in that the first time is 10 minutes; the first temperature range is the range of two degrees centigrade above and below the original temperature; the first illumination intensity range is 95% -105% of the original illumination intensity.
7. A plant environment conditioning system that employs the plant environment conditioning method according to any one of claims 1 to 6, comprising:
the device comprises a leather electric sensing bracelet, a wireless module and a charging module, wherein the leather electric sensing bracelet is provided with a leather electric sensor, the wireless module and the charging module; the monitoring system is used for acquiring the production speed and the first pass rate;
and the management platform is used for storing and analyzing the skin level data uploaded by the skin electric sensing bracelet.
8. The conditioning system of claim 7, further comprising:
a temperature adjustment device;
a brightness adjustment device;
a loudspeaker.
9. The adjustment system of claim 7, wherein the wireless module is a bluetooth module; the conditioning system further comprises: and a workshop control center.
10. The adjustment system of claim 7, wherein the skin conductance measuring bracelet further comprises at least one of the following structures:
an electric quantity indicator light;
numbering;
and a charging module.
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| CN111067552B (en) * | 2019-12-30 | 2022-07-01 | 中国船舶工业综合技术经济研究院 | System for measuring influence of illumination factors on operation performance of special shift workers |
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| CN101989086A (en) * | 2010-09-10 | 2011-03-23 | 李隆 | Music and color-light environmental control centre based on internet |
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| CN106073733A (en) * | 2016-05-12 | 2016-11-09 | 华北电力大学（保定） | A kind of portable physiological stress Monitoring Indexes bracelet device |
| CN206583482U (en) * | 2017-02-27 | 2017-10-24 | 安徽大学 | Intelligent environment monitoring system for industrial workshop |
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