Apparatus for testing different electrical sensors
First Claim
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1. An apparatus for testing different electrical sensors, comprising:
- (a) means for providing a ground voltage signal;
(b) first conductor means connected to said ground voltage signal providing means and connectible to a sensor under test for conducting the ground voltage signal to the sensor under test;
(c) means for supplying a positive voltage signal;
(d) second conductor means connected to said positive voltage signal supplying means and connectible to a sensor under test for conducting the positive voltage signal to the sensor under test;
(e) third conductor means connectible to the sensor under test for receiving and conducting a voltage signal from the sensor under test;
(f) first detector means connected in series to said voltage signal conducting third conductor means for receiving the sensor voltage signal from said third conductor means, comparing the sensor voltage signal to a ground voltage reference signal, and producing an output signal of a first state when the sensor voltage signal is less in magnitude than the ground voltage reference signal and of a second state when the sensor voltage signal is greater in magnitude than the ground voltage reference signal;
(g) second detector means connected in series to said voltage signal conducting third conductor means and in parallel with said first detector means for receiving the sensor voltage signal from said third conductor means, comparing the sensor voltage signal to a first positive voltage reference signal, and producing an output signal of a first state when the sensor voltage signal is greater in magnitude than the first positive voltage reference signal and of a second state when the sensor voltage signal is less in magnitude than the first positive voltage reference signal;
(h) third detector means connected in series to said third conductor means and in parallel with said first detector means and second detector means for receiving the sensor voltage signal from said third conductor means, comparing the sensor voltage signal to a positive voltage reference signal, and producing an output signal of a first state when the sensor voltage signal is a train of individual pulses produced by a sensor under test and the individual pulses are greater in magnitude than a second positive voltage reference signal being between the ground voltage reference signal and the first positive voltage reference signal and of a second state when the individual pulses are less in magnitude than the second positive voltage reference signal; and
(i) means for indicating a first condition when the operation of the sensor under test is satisfactory and a second condition when the operation of the sensor under test is unsatisfactory, said indicating means being connected to said first detector means, second detector means, and third detector means, for receiving the output signals therefrom and indicating the first condition when any one of the output signals is of the first state and indicating the second condition when all output signals are of the second state.
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Abstract
An apparatus for testing different electrical sensors used in machinery includes first, second and third insulated conductors, a grounded connection, a power supply, a low signal detector, a high signal detector, a varying signal detector, and an indicator. The first and second conductors are connectible to sensor under test to respectively conduct ground and supply voltage signals to the sensor. The third conductor is connectible to the sensor under test to conduct an input voltage signal from the sensor to the low, high and varying signal detectors. The low signal detector compares the input voltage signal with a low voltage reference signal. The high signal detector compares the input voltage signal with a high voltage reference signal. The varying signal detector compares the input voltage signal with a positive voltage reference signal. The low, high and varying signal detectors produce output signals of either first or second states which are received by the indicator. In response to any one of the output signals being of the first state, the indicator assumes a first condition indicating that the operation of the sensor under test is satisfactory. In response to all output signals being of the second state, the indicator assumes a second condition indicating that the operation of the sensor under test is unsatisfactory.
65 Citations
9 Claims
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1. An apparatus for testing different electrical sensors, comprising:
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(a) means for providing a ground voltage signal; (b) first conductor means connected to said ground voltage signal providing means and connectible to a sensor under test for conducting the ground voltage signal to the sensor under test; (c) means for supplying a positive voltage signal; (d) second conductor means connected to said positive voltage signal supplying means and connectible to a sensor under test for conducting the positive voltage signal to the sensor under test; (e) third conductor means connectible to the sensor under test for receiving and conducting a voltage signal from the sensor under test; (f) first detector means connected in series to said voltage signal conducting third conductor means for receiving the sensor voltage signal from said third conductor means, comparing the sensor voltage signal to a ground voltage reference signal, and producing an output signal of a first state when the sensor voltage signal is less in magnitude than the ground voltage reference signal and of a second state when the sensor voltage signal is greater in magnitude than the ground voltage reference signal; (g) second detector means connected in series to said voltage signal conducting third conductor means and in parallel with said first detector means for receiving the sensor voltage signal from said third conductor means, comparing the sensor voltage signal to a first positive voltage reference signal, and producing an output signal of a first state when the sensor voltage signal is greater in magnitude than the first positive voltage reference signal and of a second state when the sensor voltage signal is less in magnitude than the first positive voltage reference signal; (h) third detector means connected in series to said third conductor means and in parallel with said first detector means and second detector means for receiving the sensor voltage signal from said third conductor means, comparing the sensor voltage signal to a positive voltage reference signal, and producing an output signal of a first state when the sensor voltage signal is a train of individual pulses produced by a sensor under test and the individual pulses are greater in magnitude than a second positive voltage reference signal being between the ground voltage reference signal and the first positive voltage reference signal and of a second state when the individual pulses are less in magnitude than the second positive voltage reference signal; and (i) means for indicating a first condition when the operation of the sensor under test is satisfactory and a second condition when the operation of the sensor under test is unsatisfactory, said indicating means being connected to said first detector means, second detector means, and third detector means, for receiving the output signals therefrom and indicating the first condition when any one of the output signals is of the first state and indicating the second condition when all output signals are of the second state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification
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Current AssigneeBruce D. Nelson
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Original AssigneeBruce D. Nelson
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InventorsNelson, Bruce D.
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Primary Examiner(s)Snow, Walter E.
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Application NumberUS07/804,910Time in Patent Office655 DaysField of Search324/537, 324/546, 324/556, 324/555, 324/133, 324/72.5, 324/149, 324/73.1, 324/202, 324/226, 340/660, 340/661, 340/663, 340/665, 340/635, 340/653, 340/643, 340/654, 340/656, 73/1 R, 73/1 DUS Class Current324/133CPC Class CodesG01R 31/2829 Testing of circuits in sens...
