 Lumber defect scanning including multi-dimensional pattern recognition |
| In accordance with the present invention, a method for identifying a defect relative to a given ... |
|
| Demodulation and phase estimation of two-dimensional patterns |
| INCLUDING BEST MODE Consider a two-dimensional fringe pattern with intensity of the fringe pattern ... |
|
| Component shape recognition method |
| An object of the present invention is to provide a component shape recognition method which enables ... |
|
| Wire bonding inspection equipment |
| Accordingly, it is an object of the present invention to provide wire bonding inspection equipment ... |
|
| Wire bonding external appearance inspecting apparatus |
| Accordingly, an object of the present invention is to provide a wire bonding external appearance ... |
|
| Method and apparatus for machine vision classification and tracking |
| To overcome the limitations in the prior art described above, and to overcome other limitations ... |
|
| Efficient image registration |
| An efficient registration method and apparatus provides substantial registration of all of the ... |
|
| Automated optical inspection apparatus |
| This invention provides a method and apparatus for automatically locating the bond of a wire to a ... |
|
| Digital image processing |
| FIG. 1 is an illustration of a typical hardware layout according to an embodiment of the invention.... |
|
|
Measuring system
| Details |
Inventors: Gallant, John Henry; Johnson, Michael Robert Thomas;
Assignee: May & Baker Limited (Dagenham, EN)
Primary Examiner: Zazworsky; John
Assistant Examiner:
Attorney, Agent or Firm: Stevens, Davis, Miller & Mosher
A measuring system in which a signal representative of the instantaneous value of a physical parameter being measured is utilized as a reference signal against which the next following signal is compared and so on. The system includes means for passing to an output, signals similar to, or within a predetermined limit of, the immediately preceding signals. A particular application of this measuring system is in the measurement of the temperature of living bodies wherein the changes in temperature are transmitted via a pulse width modulation telemetry system to a receiver incorporating the measuring system. By means of continually up-dating the reference signal it is possible to reject any signal which due to some reason such as radio interference is unacceptable because it varies too much from the previous reading. |
|
DETAILED DESCRIPTION We claim: 1.
A measuring system comprising a signal processor including a first counter for storing a next following signal representative of the instantaneous value of a parameter being measured, a second counter for storing the previous signal representative of the instantaneous value of said parameter, which serves as a reference signal, comparison means for comparing said reference signal with said next following signal, means for passing to an output the signal held in said first counter whenever it is within a predetermined limit of said reference signal, means for up-dating said second counter by entering said next following signal held in said first counter into said second counter, which signal acts as the next reference signal, and clock pulse generator means for supplying clock pulses to both said counters in response to an input signal to said signal processor.
2.
A measuring system as claimed in claim 1, further comprising means for determining when a count in said first counter is within the predetermined limit of the count in said second counter and, if so, to transfer the count in said first counter to an output of said signal processor.
3.
A measuring system as claimed in claim 2, wherein said up-dating means includes means for transferring the count recorded in said first counter into said second counter irrespective of whether a signal appears at said output of said signal processor.
4.
A measuring system as claimed in claim 3, wherein said means for determining whether the difference between the count in said second counter and the count in said first counter is within a predetermined limit, said means for transferring the count in said first counter to said output of said signal processor and said means for transferring the count recorded in said first counter into said second counter irrespective of whether the signal appears at said output of said signal processor, comprises suitably connected logic means.
5.
A measuring system as claimed in claim 4, wherein said logic means comprises NAND and NOR gates, monostable circuits and gated memory circuits
|
|
Image Analysis 
