-SQA- SCOTTISH QUALIFICATIONS AUTHORITY NATIONAL CERTIFICATE MODULE: UNIT SPECIFICATION GENERAL INFORMATION. -Module Number Session

Transcription

1 -SQA- SCOTTISH QUALIFICATIONS AUTHORITY NATIONAL CERTIFICATE MODULE: UNIT SPECIFICATION GENERAL INFORMATION -Module Number Session Superclass- -Title- XL MICROELECTRONICS FOR MECHATRONICS DESCRIPTION- GENERAL COMPETENCE FOR UNIT: Using electronic devices in interfacing with a microprocessor system and explaining power electronic devices and circuits. OUTCOMES 1. use microprocessor systems in control applications; 2. use electronic devices for signal manipulation and conditioning; 3. evaluate the performance of driver devices; 4. describe power electronic devices and circuits. CREDIT VALUE: 1 NC Credit ACCESS STATEMENT: Access to this unit is at the discretion of the centre. However, it would be beneficial if the candidate had some experience in electronic systems; this may be evidenced by possession of National Certificate modules: Mechatronics Applications or , Introduction to Electronic Systems (x 1/2) or similar qualification or experience For further information contact: Committee and Administration Unit, SQA, Hanover House, 24 Douglas Street, Glasgow G2 7NQ. Additional copies of this unit may be purchased from SQA (Sales and Despatch section). At the time of publication, the cost is 1.50 (minimum order 5.00).

2 NATIONAL CERTIFICATE MODULE: UNIT SPECIFICATION STATEMENT OF STANDARDS UNIT NUMBER: UNIT TITLE: MICROELECTRONICS FOR MECHATRONICS Acceptable performance in this unit will be the satisfactory achievement of the standards set out in this part of the specification. All sections of the statement of standards are mandatory and cannot be altered without reference to SQA. OUTCOME 1. USE MICROPROCESSOR SYSTEMS IN CONTROL APPLICATIONS PERFORMANCE CRITERIA (a) (b) (c) (d) The structure and function of a microprocessor system is clearly described including bus interconnections. The merits of parallel and serial interfacing methods are compared comprehensively. The concepts of memory mapping and dedicated port addressing are clearly described with respect to external communication. The use of prepared software to send and receive signals is correct with respect to sequencing Light Emitting Diode (LED). RANGE STATEMENT The range for the outcome is fully expressed within the performance criteria. EVIDENCE REQUIREMENTS Written or oral evidence is required to show that the candidate can outline the functions of the microprocessor as described in PCs (a)-(c). Evidence must be provided to show that the candidate can use the microprocessor to switch the LED in a pattern to illustrate input signals and output signals as described in PC (d). 2

3 OUTCOME 2. USE ELECTRONIC DEVICES FOR SIGNAL MANIPULATION AND CONDITIONING PERFORMANCE CRITERIA (a) (b) (c) (d) The use of transistors is correct for the requirements of amplification. The use of op-amps as amplifiers and comparators is correct in terms of the circuit interface. The use of AND, NAND, OR, NOR, and NOT logic gates for signal conditioning is correct. The use of A/D and D/A convertors for signal monitoring is correct for the given circumstance. RANGE STATEMENT The range for the outcome is fully expressed within the performance criteria. EVIDENCE REQUIREMENTS Written or oral evidence is required to show that the candidate can use electronic devices to meet the requirements of PCs (a)-(d). OUTCOME 3. EVALUATE THE PERFORMANCE OF DRIVER DEVICES PERFORMANCE CRITERIA (a) (b) (c) (d) (e) The required input signals and operation of a driver device are clearly explained. The need for system protection is clearly explained and is appropriate to the given circumstances. Devices are selected and correctly used for drive purposes. The performance of driver devices is correctly recorded. Devices are evaluated accurately with respect to given drive purpose. RANGE STATEMENT Driver devices: integrated circuit open collector; tri-state buffers. 3

4 EVIDENCE REQUIREMENTS Performance evidence to show that the candidate can select and use driver devices as described in PC (c). Written and oral evidence is required to show that the candidate can explain the concepts for driver devices as described in PCs (a) and (b) and can record and evaluate the performance of the device as detailed in PCs (d) and (e). OUTCOME 4. DESCRIBE POWER ELECTRONIC DEVICES AND CIRCUITS PERFORMANCE CRITERIA (a) (b) (c) The identification of power electronic device is appropriate for given application. The description for the necessity of triggering pulse characteristics is clear and correct for given application. The description of power electronic control circuit is appropriate to given controller and application. RANGE STATEMENT The range for this outcome is fully expressed in the performance criteria. EVIDENCE REQUIREMENTS Written and oral evidence is required to show that the candidate can describe the main concepts for power electronic devices for given applications, as described in PCs (a)-(c)

5 ASSESSMENT In order to achieve this unit, candidates are required to present sufficient evidence that they have met all the performance criteria for each outcome within the range specified. Details of these requirements are given for each outcome. The assessment instruments used should follow the general guidance offered by the SQA assessment model and an integrative approach to assessment is encouraged. (See references at the end of support notes). Accurate records should be made of the assessment instruments used showing how evidence is generated for each outcome and giving marking schemes and/or checklists, etc. Records of candidates achievements should be kept. These records will be available for external verification. SPECIAL NEEDS In certain cases, modified outcomes and range statements can be proposed for certification. See references at end of support notes. Copyright SQA 1996 Please note that this publication may be reproduced in whole or in part for educational purposes provided that: (i) (ii) no profit is derived from the reproduction; if reproduced in part, the source is acknowledged. 5

6 NATIONAL CERTIFICATE MODULE: UNIT SPECIFICATION SUPPORT NOTES UNIT NUMBER: UNIT TITLE: MICROELECTRONICS FOR MECHANTRONICS SUPPORT NOTES: This part of the unit specification is offered as guidance. None of the sections of the support notes is mandatory. NOTIONAL DESIGN LENGTH: SQA allocates a notional design length to a unit on the basis of time estimated for achievement of the stated standards by a candidate whose starting point is as described in the access statement. The notional design length for this unit is 40 hours. The use of notional design length for programme design and timetabling is advisory only. PURPOSE To provide the candidate with knowledge and understanding of the interfacing of a microprocessor for practical control and actuating applications. SQA publishes summaries of NC units for easy reference, publicity purposes, centre handbooks, etc. The summary statement for this unit is as follows: On completion of this unit you will be able to describe the concepts of microprocessor control and the necessary interfacing needed for actuating applications. You will be able to investigate and evaluate a functional microprocessor control process to establish the fundamental principles. CONTENT/CONTEXT The candidate should achieve the level of competence of someone who may be expected to use microelectronics for simple practical applications Corresponding to Learning Outcomes: 1. Technologies: microprocessor; external hardware to emulate input/output signal sources such as switches and LED banks. The candidate should be aware of the system ports and memory structure, the level of address and data bus system, but without going into too great detail. Performance criteria (d) should involve no external hardware other than what is indicated in the range statement. 6

7 2. PC (a) should include common emitter and emitter follower connections only. 3. The candidate should be aware of the different driver devices which are available to be used in conjunction with suitable loads such as: relays, solenoids, tungsten lamps, motor and stepper motor drive system. 4. Applications: solenoids; motors; tungsten lamps. Key aspects of electronic devices: relays; power transistors; triacs and thyristors, also single phase, halfware fullwave and DC systems. APPROACHES TO GENERATING EVIDENCE The unit should be delivered in the order which the Outcomes are listed, to allow the candidate to build upon each practical aspect of the previous Outcome. Outcomes 1 to 3 may be approached using worksheets to suit the laboratory activities. Reference to theory notes and small group discussions might also be encouraged at this time. For Outcome 2, a performance criteria should be based upon laboratory activity conducted by individual candidates, but group work on the operation of A/D and D/A conversion would be acceptable. For Outcome 4, a practical example of power electronics should be shown and group discussion might be encouraged at this time. Where possible this unit should be taught in conjunction with mechatronics applications (new). ASSESSMENT PROCEDURES Centres may use the instruments of assessment which are considered by tutors/trainers to be most appropriate. Examples of instruments of assessment which could be used are as follows: Outcomes 1 and 2: Outcome 3: Outcome 4: A case study which covers all performance criteria should be used. it may be possible to combine these two outcomes in one assessment. An assignment could be set to test a candidate s ability to evaluate the performance of driver devices. Structured questions to cover all performance criteria should be used. PROGRESSION This module progresses to Higher National Units such as Microcontrollers: Architecture, Programming and Applications and Control Systems Theory. This unit forms part of the GSVQ in Engineering at Level III. Candidates successfully completing the GSVQ in Engineering at Level III will be able to progress to an HNC/D programme in related disciplines. 7

8 RECOGNITION Many SQA NC units are recognised for entry/recruitment purposes. For up-to-date information see the SQA guide Recognised Groupings of National Certificate Modules. REFERENCES 1. Guide to unit writing. (A018). 2. For a fuller discussion on assessment issues, please refer to SQA s Guide to Assessment. (B005). 3. Procedures for special needs statements are set out in SQA s guide Candidates with Special Needs. (B006). 4. Information for centres on SQA s operating procedures is contained in SQA s Guide to Procedures. (F009). 5. For details of other SQA publications, please consult SQA s publications list. (X037). Copyright SQA 1996 Please note that this publication may be reproduced in whole or in part for educational purposes provided that: (i) (ii) no profit is derived from the reproduction; if reproduced in part, the source is acknowledged. 8