CN104807594A - Automatic measuring system based on matrix switch - Google Patents
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- CN104807594A CN104807594A CN201510144731.8A CN201510144731A CN104807594A CN 104807594 A CN104807594 A CN 104807594A CN 201510144731 A CN201510144731 A CN 201510144731A CN 104807594 A CN104807594 A CN 104807594A
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- 238000005259 measurement Methods 0.000 claims abstract description 37
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Abstract
The invention discloses an automatic measuring system based on a matrix switch. The automatic measuring system based on the matrix switch comprises a sensor module, a programmable power supply, a measurement control module, the matrix switch, a multiplexer, a constant flow source, a data acquisition device and a main control computer, wherein the programmable power supply is connected with the sensor module and the measurement control module and used for providing power for the sensor module, the measurement control module is connected with the matrix switch and the multiplexer respectively and used for controlling logical choice of the matrix switch and channel choice of the multiplexer, one end of the data acquisition device is connected with the matrix switch, the other end of the data acquisition device is connected with the main control computer, the data acquisition device is used for finishing measurement of input signals of a sensor, and the main control computer is used for performing controlling and data exchange on the sensor module through a serial port. By means of the automatic measuring system based on the matrix switch, combinatorial logic switching control is achieved through the matrix switch and the multiplexer, working efficiency of a sensor test device is extremely increased, and detection of a plurality of sensors can be performed simultaneously.
Description
Technical field
The present invention relates to sensor test field, particularly relate to a kind of automatic measurement system based on matrix switch.
Background technology
Along with the arrival of information age, information science technology develop rapidly, sensor is as the important component part of infotech, and its development level standard the level of a national scientific technological advance, becomes the focus of information age.The high speed development of the progress that the information processing technology obtains and microprocessor and computer technology, all needs there is corresponding progress in the exploitation of sensor.Microprocessor is widely used in measurement and control system.
In addition, in the industry such as manufacture, test of hyundai electronics, electrical equipment, and in the fields such as electrical equipment manufacture, scientific research, the serviceability of testing various element or module is all needed.For multiple test events of a module, often upper once tested after change the outfit and test again, the time changed the outfit is longer, and, for multiple tested module, always aptitude test after a upper module testing completes, namely at one time in section, only have a testing tool to be in running order, the utilization rate how reducing number of times and the raising testing tool changed the outfit is all a difficult problem.
Detected pressures sensor, different according to object, the project of detection is also different, and the method for detection also will be had any different, and specifically, has several mode:
1, the detection on bridge road, whether the circuit of main detecting sensor is correct, is generally Hui Sitong full-bridge circuit, utilizes the ohms range of multimeter, impedance between amount input end and the impedance between output terminal, these two impedances are exactly the input, output-resistor of pressure transducer.If impedance is infinitely great, bridge road disconnects, and illustrates that sensor has the definition of problem or pin not have correct judgment.
2, the detection at zero point, with the voltage gear of multimeter, detects and is not executing under stressed condition, the offset output of sensor.This exports and is generally the voltage of mV level, if beyond the technical indicator of sensor, the zero deviation over range of sensor is just described.
3, pressurization detects, and the method for inspection list is: to sensor power, with the gas port of mouth blow pressure force snesor, by the change in voltage of the voltage gear detecting sensor output terminal of multimeter.If the relative sensitivity of pressure transducer is very large, this variable quantity can be obviously.If show no sign of change, just need to use pneumatic supply instead and apply pressure.
By above method, the situation of a sensor substantially can be detected.If need to detect accurately, just need the pressure source by standard, to cell pressure, according to the size of pressure and the variable quantity of output signal, sensor is calibrated.And when condition is permitted, carry out the temperature detection of correlation parameter.
Summary of the invention
The defect that technical matters to be solved by this invention is how to overcome existing sensor detector inefficiency, can not detects the state of multiple sensor etc. simultaneously.
In order to solve the problems of the technologies described above, the invention provides a kind of automatic measurement system based on matrix switch, comprise sensor module, programmable power supply, Survey control module, matrix switch, multiplexer, constant current source, data collector and main control computer, described programmable power supply is connected with Survey control module with sensor module, and for powering for sensor module, described Survey control module is connected with multiplexer respectively at matrix switch, and for the logic selection of gating matrix switch and the channel selecting of multiplexer, described data collector one end is connected with matrix switch, the other end is connected with main control computer, for completing the measurement of sensor input signal, described main control computer is used for being controlled and exchanges data sensor module by serial ports.
Further, described sensor module comprises multiple sensor, pressure tester and constant temperature oven, and described pressure transducer is connected with sensor, and described sensor setting is in constant temperature oven, and described sensor is used for detected pressures tester institute applied pressure; Described pressure tester is connected with source of the gas, for setting the force value being applied to sensor; Described constant temperature oven, for providing system debug temperature required environment for sensor.
Further, described matrix switch has the N*N matrix be made up of N number of load module and N number of output module.
Further, a load module comprises n single-pole double-throw switch (SPDT) and 2 single-pole n-throw switch, the fixed port docking of 2 single-pole n-throw switch, n single-pole double-throw switch (SPDT) is connected respectively with the input selection port of a single-pole n-throw switch, the input selection port of the single-pole n-throw switch be not connected with single-pole double-throw switch (SPDT) is as the delivery outlet of load module, and n single-pole double-throw switch (SPDT) is as n input port of load module; An output module comprises the single-pole n-throw switch be connected with the delivery outlet of load module and the dc-dc converter be connected with this single-pole n-throw switch fixed port, using the delivery outlet of dc-dc converter as the delivery outlet of output module, select port as the input port of output module for n of single-pole n-throw switch.
Wherein: described matrix switch is extendible matrix switch, include 32 × 32 matrixes, as required easily extensible to 48 × 32,48 × 48 or 64 × 32.Described matrix switch mainly realizes the passage bridge between each equipment of test macro and circuit-under-test plate, mainly contains following several function: 1) automatically add on the stitch that circuit-under-test plate requires by the power supply that programmable power supply exports; 2) on the stitch signal converting that arbitrarily signal generating device and GPIO plate export to circuit-under-test plate required; 3) signal converting exported by circuit-under-test plate is on the suitable Measurement channel of the ATE (automatic test equipment) such as data collecting card, oscillograph and logic analyser; 4) for circuit-under-test plate provides necessary outward element, as electronic load etc.
Further, each described sensor has M root lead-in wire, and every root lead-in wire correspondence is provided with label.
Further, described Survey control module controls the lead-in wire that the sensor of corresponding label selected by multiplexer, and described lead-in wire is linked on matrix switch, switched by the combination of matrix crossing points switch, pin to be measured is connected with the measurement port of data collector.
Further, described sensor is piezoresistive silicon sensor chip.
Further, described main control computer comprises multiple serial ports, and described multiple serial ports is connected with pressure tester, and carries out exchanges data by serial ports.
Automatic measurement system based on matrix switch of the present invention, there is following beneficial effect: present system is by using matrix switch and multiplexer, realize combinational logic and switch control, the controlling functions such as the measurement of multiple parameter such as working current, bridge voltage, output signal of multiple sensor and passage bridge, power supply, contact selection, greatly improve sensor detector work efficiency simultaneously, and can detect multiple sensor simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the system chart of the automatic measurement system based on matrix switch of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, all belongs to the scope of protection of the invention.
Embodiment one:
The invention provides a kind of automatic measurement system based on matrix switch, comprise sensor module, programmable power supply, Survey control module, matrix switch, multiplexer, constant current source, data collector and main control computer, described programmable power supply is connected with Survey control module with sensor module, and for powering for sensor module, described Survey control module is connected with multiplexer respectively at matrix switch, and for the logic selection of gating matrix switch and the channel selecting of multiplexer, described data collector one end is connected with matrix switch, the other end is connected with main control computer, for completing the measurement of sensor input signal, described main control computer is used for being controlled and exchanges data sensor module by serial ports.
Described sensor module comprises multiple sensor, pressure tester and constant temperature oven, and described pressure transducer is connected with sensor, and described sensor setting is in constant temperature oven, and described sensor is used for detected pressures tester institute applied pressure; Described pressure tester is connected with source of the gas, for setting the force value being applied to sensor; Described constant temperature oven, for providing system debug temperature required environment for sensor.
Described matrix switch has the 10*10 matrix be made up of 10 load modules and 10 output modules.
A load module comprises 10 single-pole double-throw switch (SPDT)s and 2 hilted broadsword 10 throw switches, the fixed port docking of 2 hilted broadsword 10 throw switches, n single-pole double-throw switch (SPDT) is connected respectively with the input selection port of hilted broadsword 10 throw switch, the input selection port of hilted broadsword 10 throw switch be not connected with single-pole double-throw switch (SPDT) is as the delivery outlet of load module, and 10 single-pole double-throw switch (SPDT)s are as 10 input ports of load module; An output module comprises hilted broadsword 10 throw switch be connected with the delivery outlet of load module and the dc-dc converter be connected with this hilted broadsword 10 throw switch fixed port, using the delivery outlet of dc-dc converter as the delivery outlet of output module, select port as the input port of output module for 10 of hilted broadsword 10 throw switch.
Described matrix switch mainly realizes the passage bridge between each equipment of test macro and circuit-under-test plate, mainly contains following several function: 1) automatically add on the stitch that circuit-under-test plate requires by the power supply that programmable power supply exports; 2) on the stitch signal converting that arbitrarily signal generating device and GPIO plate export to circuit-under-test plate required; 3) signal converting exported by circuit-under-test plate is on the suitable Measurement channel of the ATE (automatic test equipment) such as data collecting card, oscillograph and logic analyser; 4) for circuit-under-test plate provides necessary outward element, as electronic load etc.
Each described sensor has 4 lead-in wires, and every root lead-in wire correspondence is provided with label.
Described Survey control module controls the lead-in wire that the sensor of corresponding label selected by multiplexer, and described 4 lead-in wires are linked on matrix switch, switched by the combination of matrix crossing points switch, pin to be measured is connected with the measurement port of data collector, realizes the function such as any two points or the measuring junction access of 4, forward and reverse measurement.
Described sensor is piezoresistive silicon sensor chip.
Described main control computer comprises multiple serial ports, and described multiple serial ports is connected with pressure tester, and carries out exchanges data by serial ports.
Automatic measurement system based on matrix switch of the present invention, there is following beneficial effect: present system is by using matrix switch and multiplexer, realize combinational logic and switch control, the controlling functions such as the measurement of multiple parameter such as working current, bridge voltage, output signal of multiple sensor and passage bridge, power supply, contact selection, greatly improve sensor detector work efficiency simultaneously, and can detect multiple sensor simultaneously.
Embodiment two:
The invention provides a kind of automatic measurement system based on matrix switch, comprise sensor module, programmable power supply, Survey control module, matrix switch, multiplexer, constant current source, data collector and main control computer, described programmable power supply is connected with Survey control module with sensor module, and for powering for sensor module, described Survey control module is connected with multiplexer respectively at matrix switch, and for the logic selection of gating matrix switch and the channel selecting of multiplexer, described data collector one end is connected with matrix switch, the other end is connected with main control computer, for completing the measurement of sensor input signal, described main control computer is used for being controlled and exchanges data sensor module by serial ports.
Described sensor module comprises multiple sensor, pressure tester and constant temperature oven, and described pressure transducer is connected with sensor, and described sensor setting is in constant temperature oven, and described sensor is used for detected pressures tester institute applied pressure; Described pressure tester is connected with source of the gas, for setting the force value being applied to sensor; Described constant temperature oven, for providing system debug temperature required environment for sensor.
Described matrix switch has the 5*5 matrix be made up of 5 load modules and 5 output modules.
A load module comprises 5 single-pole double-throw switch (SPDT)s and 2 hilted broadsword 5 throw switches, the fixed port docking of 2 hilted broadsword 5 throw switches, 5 single-pole double-throw switch (SPDT)s are connected respectively with the input selection port of hilted broadsword 5 throw switch, the input selection port of hilted broadsword 5 throw switch be not connected with single-pole double-throw switch (SPDT) is as the delivery outlet of load module, and 5 single-pole double-throw switch (SPDT)s are as 5 input ports of load module; An output module comprises hilted broadsword 5 throw switch be connected with the delivery outlet of load module and the dc-dc converter be connected with this hilted broadsword 5 throw switch fixed port, using the delivery outlet of dc-dc converter as the delivery outlet of output module, select port as the input port of output module for 5 of hilted broadsword 5 throw switch.
Wherein: described matrix switch is extendible matrix switch, include 32 × 32 matrixes, as required easily extensible to 48 × 32,48 × 48 or 64 × 32.Described matrix switch mainly realizes the passage bridge between each equipment of test macro and circuit-under-test plate, mainly contains following several function: 1) automatically add on the stitch that circuit-under-test plate requires by the power supply that programmable power supply exports; 2) on the stitch signal converting that arbitrarily signal generating device and GPIO plate export to circuit-under-test plate required; 3) signal converting exported by circuit-under-test plate is on the suitable Measurement channel of the ATE (automatic test equipment) such as data collecting card, oscillograph and logic analyser; 4) for circuit-under-test plate provides necessary outward element, as electronic load etc.
Each described sensor has 4 lead-in wires, and every root lead-in wire correspondence is provided with label.
Described Survey control module controls the lead-in wire that the sensor of corresponding label selected by multiplexer, and is linked on matrix switch by described lead-in wire, is switched, be connected by pin to be measured with the measurement port of data collector by the combination of matrix crossing points switch.
Described sensor is piezoresistive silicon sensor chip.
Described main control computer comprises multiple serial ports, and described multiple serial ports is connected with pressure tester, and carries out exchanges data by serial ports.
Automatic measurement system based on matrix switch of the present invention, there is following beneficial effect: present system is by using matrix switch and multiplexer, realize combinational logic and switch control, the controlling functions such as the measurement of multiple parameter such as working current, bridge voltage, output signal of multiple sensor and passage bridge, power supply, contact selection, greatly improve sensor detector work efficiency simultaneously, and can detect multiple sensor simultaneously.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (8)
1. based on an automatic measurement system for matrix switch, it is characterized in that, comprise sensor module, programmable power supply, Survey control module, matrix switch, multiplexer, constant current source, data collector and main control computer,
Described programmable power supply is connected with Survey control module with sensor module, and for powering for sensor module, described Survey control module is connected with multiplexer respectively at matrix switch, and for the logic selection of gating matrix switch and the channel selecting of multiplexer, described data collector one end is connected with matrix switch, the other end is connected with main control computer, for completing the measurement of sensor input signal, described main control computer is used for being controlled and exchanges data sensor module by serial ports.
2. the automatic measurement system based on matrix switch according to claim 1, it is characterized in that, described sensor module comprises multiple sensor, pressure tester and constant temperature oven, and described pressure transducer is connected with sensor, described sensor setting is in constant temperature oven
Described sensor is used for detected pressures tester institute applied pressure; Described pressure tester is connected with source of the gas, for setting the force value being applied to sensor; Described constant temperature oven, for providing system debug temperature required environment for sensor.
3. the automatic measurement system based on matrix switch according to claim 2, is characterized in that, described matrix switch has the N*N matrix be made up of N number of load module and N number of output module.
4. the automatic measurement system based on matrix switch according to claim 3, it is characterized in that, a load module comprises n single-pole double-throw switch (SPDT) and 2 single-pole n-throw switch, the fixed port docking of 2 single-pole n-throw switch, n single-pole double-throw switch (SPDT) is connected respectively with the input selection port of a single-pole n-throw switch, the input selection port of the single-pole n-throw switch be not connected with single-pole double-throw switch (SPDT) is as the delivery outlet of load module, and n single-pole double-throw switch (SPDT) is as n input port of load module;
An output module comprises the single-pole n-throw switch be connected with the delivery outlet of load module and the dc-dc converter be connected with this single-pole n-throw switch fixed port, using the delivery outlet of dc-dc converter as the delivery outlet of output module, select port as the input port of output module for n of single-pole n-throw switch.
5. the automatic measurement system based on matrix switch according to claim 1-4 any one, is characterized in that, each described sensor has M root lead-in wire, and every root lead-in wire correspondence is provided with label.
6. the automatic measurement system based on matrix switch according to claim 5, it is characterized in that, described Survey control module controls the lead-in wire that the sensor of corresponding label selected by multiplexer, and described lead-in wire is linked on matrix switch, switched by the combination of matrix crossing points switch, pin to be measured is connected with the measurement port of data collector.
7. the automatic measurement system based on matrix switch according to claim 6, is characterized in that, described sensor is piezoresistive silicon sensor chip.
8. the automatic measurement system based on matrix switch according to claim 6 or 7, is characterized in that, described main control computer comprises multiple serial ports, and described multiple serial ports is connected with pressure tester, and carries out exchanges data by serial ports.
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