EP0697305A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Intelligent communication pulse detection system to control electric D.C. Motors used with automobile accessories
Assignee: Cherry Corp
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Filing: 1995-08-02
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Granted: —
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Expires: 2015-08-02
Abstract
Abstract A control system (8) for use with a bidirectional motor (10) connected to a motorized vehicle accessory to move the accessory a distance from a first position to a second position. The control system includes a detector (12) responsive to control signals emitted from the motor during rotation, where the control signals indicate the amount of motor rotation. The control system also includes a memory that stores information used to represent the position of the accessory. Additionally, this control system includes a controller (22) responsive to the memory and the detector. The controller (22) provides an output signal to operate the motor based on the distance between a first position and a second position of the accessory as well as control signals that indicate the amount of motor rotation. The controller (22) includes an adjustment routine that determines a correction factor that is applied to the output signal to compensate for inaccuracies in control signal detection.
Inventors
- 👤 Kerry Berland
- 👤 Mitchell Budniak
- 👤 Jeff Kaul
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 06:00
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/0094; B; B60; B60N; B60N2/00; B60N2/02; B60N2/0224; B60N2/0244; G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/406; G05B19/4062; G05B2219/00; G05B2219/30; G05B2219/34; G05B2219/34215; G05B2219/37; G05B2219/37169; G05B2219/37282; G05B2219/42; G05B2219/42288; G05B2219/42294; G05B2219/42322; G05B2219/45; G05B2219/45022
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
121 words
A control system for use with a bidirectional motor connected to a motorized vehicle accessory to move said accessory a distance from a first position to a second position, said control system comprising: (a) a detector responsive to control signals emitted by said motor during rotation, said control signals indicative of an amount of rotation of said motor; (b) a memory; and (c) a controller responsive to said memory and said detector, and providing an output signal to said motor for operation thereof as a function of a relationship between said distance and said control signals, said controller further including: a routine for applying an adjustment factor to said output signal to correct for inaccuracies in detection of said control signals.
Claim 2
Dependent Claim
16 words
The control system of claim 1, wherein said memory includes information indicative of said first position.
Claim 3
Dependent Claim
12 words
The control system of claim 2, wherein said controller includes a microprocessor.
Claim 4
Dependent Claim
99 words
The control system of claim 2, wherein said motor includes a fixed number of poles; said memory includes data indicative of said second position, and a position recall routine responsive to said data from said memory for rotating said motor through a number of motor poles to move said accessory to said second position; and wherein said routine is adapted to evaluate said control signals to determine when a commutation pulse may have been missed and when an extra commutation pulse may have been detected for reducing error accumulation in a position of said accessory stored in said memory.
Claim 5
Dependent Claim
15 words
The control system of claim 4, wherein said memory and said controller comprises a microprocessor.
Claim 6
Dependent Claim
29 words
The control system of claim 1, wherein said detector comprises a current detecting resistor in series with said motor and an amplifier electrically connected to said current detecting resistor.
Claim 7
Dependent Claim
95 words
A control system for engaging a bidirectional motor to manipulate an accessory over a bidirectional travel path in a motorized vehicle, comprising: (a) a sensor for detecting a commutation waveform corresponding to current passing through said motor; (b) a comparator for deriving a digital pulse train from said commutation waveform; (c) a memory for receiving and storing data representative of said commutation waveform and said digital pulse train, said memory including a programmed feature; and (d) a controller responsive to said data and said feature, said controller providing an output signal to control said motor.
Claim 8
Dependent Claim
38 words
The control system of claim 7, wherein said feature includes an obstruction detection routine for stopping said accessory by controlling said output signal to said motor when an unexpected load on said motor is detected by said routine.
Claim 9
Dependent Claim
37 words
The control system of claim 8, wherein said feature includes a motor slow down routine to slow down said motor when said accessory's position approaches an end of said travel path, thereby providing increased obstruction detection sensitivity.
Claim 10
Dependent Claim
48 words
The control system of claim 7, wherein said feature includes a soft stop routine to slow down said motor when said accessory approaches an end of said travel path and to gently stop said accessory at said end of said travel path, thereby reducing wear on said motor.
Claim 11
Dependent Claim
41 words
The control system of claim 7, wherein said feature includes a missing pulse routine and a double pulse routine responsive to said commutation waveform for reducing error accumulation over time by correcting a position of said accessory stored in said memory.
Claim 12
Dependent Claim
25 words
The control system of claim 7, wherein said accessory is selected from the group consisting of a window, a mirror, a seat, and a sunroof.
Claim 13
Dependent Claim
47 words
The control system of claim 7, wherein said comparator comprises a device for toggling a digital output when the first derivative of said analog commutation waveform changes from a positive to a negative value, and a noise reduction device to remove noise from said analog commutation waveform.
Claim 14
Dependent Claim
50 words
The control system of claim 7, wherein said system includes a plurality of motors and said output signal is modified by a motor cross-talk limiting system coupled to said sensor for reducing inrush current surges generated by other motors in the control system when said other motors start and stop.
Claim 15
Dependent Claim
112 words
A control system for engaging a bidirectional motor to manipulate an accessory over a bidirectional travel path in a motorized vehicle, comprising: (a) a sensor for detecting a commutation waveform corresponding to current passing through said motor; (b) a detector for generating a digital pulse train from said motor, said detector including a device for sensing pole crossings located near at least one pole of said motor. (c) a memory for receiving and storing data representative of said commutation waveform and said digital pulse train, said memory including a programmed feature; and (d) a controller responsive to said data and said feature, said controller providing an output signal to control said motor.
Claim 16
Dependent Claim
20 words
The control system of claim 15, wherein said device includes one of an optical sensor and a hall effect sensor.
Claim 17
Dependent Claim
153 words
A control system for controlling a motorized vehicle accessory including at least one motor operable from a d.c. power source for adjusting said accessory, and a memory for storing a plurality of positions of said accessory, the control system comprising: (a) a sensor for detecting current supplied from said d.c. power source to said motor; (b) a generator for generating a signal indicative of a position of said accessory from current fluctuations in a supply line from said d.c. power source to said motor during an adjustment in said position of said accessory; and (c) a controller including a first routine for monitoring said signal for conditions indicative of an obstruction in a path of said accessory based upon a rate of change of said current fluctuations relative to said position and a second routine to send an output signal to said motor to stop said accessory thereby providing an automatic safety feature.
Claim 18
Dependent Claim
47 words
The control system of claim 17, wherein said controller includes a routine that monitors said signal for conditions that indicate said accessory is close to an end of a traversal path and then sends an output signal to slow down said motor to gently stop said accessory.
Claim 19
Dependent Claim
28 words
The control system of claim 17 in which said second routine is further characterized as sending said output signal to said motor to reverse direction of said accessory.
Claim 20
Independent Claim
147 words
A method of controlling an accessory of a motorized vehicle including at least one motor operable from a d.c. power source for adjusting a position of said accessory, a memory for storing a plurality of positions of said accessory, and a microcomputer based electronic controller, comprising the steps of: (a) sensing current supplied from said d.c. power source to said motor; (b) generating a signal indicative of the position of said accessory from current fluctuations in a supply line from said d.c. power source to said motor during an adjustment in the position of said accessory; and (c) measuring said signal to determine a number of commutation pulses that have been missed and a number of double pulses; and (d) compensating for said number of missing commutation pulses and said number of double pulses to store a corrected data position representing said accessory position into said memory.
Claim 21
Independent Claim
144 words
A method of controlling an accessory of a motorized vehicle including at least one motor operable from a d.c. power source for adjusting a position of said accessory, a memory for storing a plurality of positions of said accessory, and a microcomputer based electronic controller, comprising the steps of: (a) sensing current supplied from said d.c. power source to said motor; (b) generating a signal indicative of the position of said accessory from current fluctuations in a supply line from said d.c. power source to said motor during an adjustment in the position of said accessory; and (c) monitoring said signal for conditions that indicate an obstruction is in a traversal path of said accessory to stop said accessory and conditions that indicate said accessory is close to an end of said traversal path to slow down said motor and gently stop said accessory.
Claim 22
Independent Claim
151 words
A system for controlling an accessory of a motorized vehicle including at least one motor operable from a d.c. power source for adjusting a position of said accessory, a memory for storing a plurality of positions of said accessory, and a microcomputer based electronic controller, comprising: (a) means for sensing current supplied from said d.c. power source to said motor; (b) means for generating a signal indicative of the position of said accessory from current fluctuations in a supply line from said d.c. power source to said motor during an adjustment in the position of said accessory; (c) means for measuring said signal to determine a number of commutation pulses that have been missed and a number of double pulses; and (d) means for compensating for said number of missing commutation pulses and said number of double pulses to store a corrected data position representing said accessory position into said memory.
Claim 23
Independent Claim
149 words
A system for controlling an accessory of a motorized vehicle including at least one motor operable from a d.c. power source for adjusting a position of said accessory, a memory for storing a plurality of positions of said accessory, and a microcomputer based electronic controller, comprising the steps of: (a) means for sensing current supplied from said d.c. power source to said motor; (b) means for generating a signal indicative of the position of said accessory from current fluctuations in a supply line from said d.c. power source to said motor during an adjustment in the position of said accessory; (c) means for monitoring said signal for conditions that indicate an obstruction is in a travel path of said accessory to stop said accessory and conditions that indicate said accessory is close to an end of said traversal path to slow down said motor and gently stop said accessory.
Claim 24
Dependent Claim
145 words
A control system for use with a bidirectional motor connected to a motorized vehicle accessory to move said accessory a distance from a first position to a second position, said control system comprising: (a) means for detecting control signals emitted by said motor during rotation, said control signals indicative of an amount of rotation of said motor; (b) a memory including a representative control signal waveform; and (c) a controller responsive to said memory and said detecting means, and providing an output signal to said motor for operation thereof as a function of a relationship between said distance and said control signals, said controller including: (i) means for comparing said control signals detected by said detecting means to said representative control signal waveform, and (ii) means for adjusting said output signal to said motor as a function of said comparison made by said comparing means.
Claim 25
Dependent Claim
104 words
A control system for use with a bidirectional motor that generates control signals indicative of an amount of rotation of said motor, said bidirectional motor connected to a motorized vehicle accessory to move said accessory a distance from a first position to a second position, said control system comprising: (a) a detector responsive to said control signals; (b) a means for synchronously sampling said control signals with the generation thereof; and (c) a controller responsive to said synchronous sampling means for providing an output signal to said motor for operation thereof as a function of a relationship between said distance and said control signals.
Claim 26
Dependent Claim
14 words
The control system of claim 25 wherein said control signals comprise commutation pulse signals.
Claim 27
Dependent Claim
28 words
The control system of claim 25 wherein said control signals are output from a sensor located relative to said motor to provide an output indicative of movement thereof.
Claim 28
Dependent Claim
13 words
The control system of claim 27 wherein said sensor is an optical sensor.
Claim 29
Dependent Claim
14 words
The control system of claim 27 wherein said sensor is a Hall effect sensor.
Claim 30
Dependent Claim
147 words
A control system for controlling a motorized vehicle accessory including at least one motor operable from a d.c. power source for adjusting said accessory, and a memory for storing a plurality of positions of said accessory, the control system comprising: (a) a sensor for detecting current supplied from said d.c. power source to said motor; (b) a generator for generating a signal indicative of a position of said accessory from current fluctuations in a supply line from said d.c. power source to said motor during an adjustment in said position of said accessory; and (c) a controller for monitoring said signal for conditions indicative of an obstruction in a path of said accessory based upon a rate of change of said current fluctuations relative to said position and sending a signal to said motor to alter operation thereof upon said indication thereby providing an automatic safety feature.
References Cited (Backward Citations)
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