CN102589404A - Intelligent differential transformer-type static and dynamic displacement transducer and displacement measuring method thereof - Google Patents
Intelligent differential transformer-type static and dynamic displacement transducer and displacement measuring method thereof Download PDFInfo
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- CN102589404A CN102589404A CN2012100174127A CN201210017412A CN102589404A CN 102589404 A CN102589404 A CN 102589404A CN 2012100174127 A CN2012100174127 A CN 2012100174127A CN 201210017412 A CN201210017412 A CN 201210017412A CN 102589404 A CN102589404 A CN 102589404A
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Abstract
The invention discloses an intelligent differential transformer-type static and dynamic displacement transducer and a displacement measuring method thereof. The intelligent differential transformer-type static and dynamic displacement transducer comprises a voltage/current measuring unit, a temperature measuring unit, a processing unit and a memory unit, wherein the voltage/current measuring unit comprises a differential transformer and a voltage/current processing module; the processing unit comprises a processor, a displacement value computing module, a temperature compensating module and a number identifying module; the cross sections of a secondary coil a (2) and a secondary coil b (3) are stepped; the secondary coil a (2) and the secondary coil b (3) are horizontally wound incrementally from the central line of a coil cavity (8) to two ends respectively; and the memory unit at least stores an equipment number, a calibrating linear coefficient and a temperature compensating coefficient. The intelligent differential transformer-type static and dynamic displacement transducer and the displacement measuring method thereof have the advantages that a target displacement value can be directly output; the linear precision of the differential transformer is high; a host machine can operate and control a transducer with a specified number; and the transducer can work independently without the control of the host computer.
Description
Technical field
The present invention relates to a kind of intelligent differential transformer type sound attitude displacement transducer and displacement measurement method thereof.
Background technology
Along with the development of Chinese national economy, progress of science and technology, the improving constantly of automaticity, the consumption of sensor is increasing, and exploitation new and high technology displacement transducer product has broad prospects.Differential pressure swing type displacement transducer (LVDT) is simple in structure because of it, good linearity, precision high, measurement range is big, receive that extraneous interference is little, dynamic perfromance reaches the job stability advantages of higher well, has been widely used in numerous areas such as engineering machinery, space flight and aviation, railway traffic, bridge exploration, chemical industry and scientific research at present.
Yet; There is the problem of the following aspects in existing differential pressure swing type displacement transducer: (1) existing displacement transducer mostly can only output current or intermediate value such as voltage; Also need to handle and calculate, just can obtain displacement of targets value (mm of unit etc.), a lot of displacement transducers usually need be set in large-scale supervisory system through the processing and the computing module on backstage; The processing on backstage and amount of calculation are just very huge like this, have increased the working load on backstage.(2) as shown in Figure 1; The coil turn of secondary coil institute's coiling from position of center line to both ends of the surface of existing differential transformer is identical; When armature moved to coil end, the output of the electromotive force of generation diminished, and the linear precision of this conventional coil coiling mode is relatively poor.(3) we know, temperature drift has a strong impact on the displacement measurement precision in many occasions, and traditional differential pressure swing type displacement transducer all is not provided with temperature compensation module, has influenced the measuring accuracy of displacement of targets value.(4) existing differential pressure swing type displacement transducer is not provided with the numbering identification module; The also number information of storage sensors not in the storage unit; Host computer can't specify the sensor of numbering to operate and control to certain; In system, use in a large number under the occasion with a kind of sensor, cause the confusion of order easily.
Summary of the invention
The objective of the invention is to solve the deficiency of existing differential transformer displace; Provide that a kind of novel high precision, little temperature floated, long life and be output as the intelligent differential transformer type sound attitude displacement transducer and the displacement measurement method thereof of displacement of targets value, overcoming traditional differential transformer displace can only output current or intermediate value such as voltage; The coil turn of secondary coil institute's coiling from position of center line to both ends of the surface is identical, and when armature moved toward end face, the electromotive force output of generation diminished, and linear precision is relatively poor; Temperature compensation module is not set, has influenced the measuring accuracy of displacement of targets value; Transmitter is not numbered, cause the shortcomings such as confusion of order easily.
The objective of the invention is to realize: intelligent differential transformer type sound attitude displacement transducer through following technical scheme; It comprises voltage/current measuring unit, temperature measurement unit, processing unit and storage unit, and voltage/current measuring unit, temperature measurement unit and storage unit are connected with processing unit respectively; The voltage/current measuring unit comprises differential transformer and voltage/current processing module, and the output of differential transformer is connected with the voltage/current processing module, and the output of voltage/current processing module is connected with processing unit; Processing unit comprises processor and shift value computing module, temperature compensation module and numbering identification module; Described differential transformer comprises primary coil, secondary coil a, secondary coil b, coil rack, magnetic conductive shell, connecting link and is located at the armature on connecting link top; Coil rack is provided with coil bore near a side of magnetic conductive shell; The opposite side of coil rack surrounds hollow reservoir; Primary coil is wrapped in the side of coil bore near coil rack, and secondary coil a and secondary coil b symmetry are wrapped in the side of coil bore near magnetic conductive shell, and the cross section of secondary coil a and secondary coil b is stepped appearance; Secondary coil a and secondary coil b press the coiling of incremental manner horizontal symmetrical with the center line of coil bore to two ends respectively, and connecting link and armature are positioned at hollow reservoir; Storage unit stores device numbering, calibration line property coefficient and temperature compensation coefficient at least.
Temperature measurement unit of the present invention comprises a temperature sensor and an analog to digital converter, and the output of temperature sensor is connected with analog to digital converter, and the output of analog to digital converter is connected with processing unit.
Processing unit of the present invention also can be connected with host computer through communication bus, and communication bus comprises RS-485 bus or CAN bus.
Processor of the present invention comprises microprocessor or field programmable gate array PFGA.
The displacement measurement method of intelligence differential transformer type sound attitude displacement transducer, it may further comprise the steps:
(1) drive displacement is conveyed to armature through connecting link with displacement, and armature is left and right sides translation in hollow reservoir, makes to produce difference between the electromotive force of secondary coil a and secondary coil b;
Electromotive Difference Of Potential between (2) two secondary coils exports circuit for signal conditioning to, through regulating back acquisition dc voltage/current value, converts the target number voltage/current signals into and transfers to processing unit through analog to digital converter again;
(3) the real-time ambient temperature value of temperature sensor sensing converts the target number temperature signal into and transfers to processing unit through analog to digital converter;
(4) the calibration line property coefficient of storing in the processor reading cells, the shift value computing module multiplies each other target number voltage/current signals and calibration line property coefficient, obtains the initial displacement value;
(5) processor is read the penalty coefficient under this temperature according to the target number temperature signal, and temperature compensation module obtains the displacement of targets value with initial displacement value and penalty coefficient addition.
The present invention also can comprise the step that a processing unit is communicated by letter with host computer, and processing unit is sent to host computer with the displacement of targets value through communication bus according to the operational order of host computer.
Intelligent differential transformer type sound attitude displacement transducer of the present invention can work alone, and independently accomplishes collection, calculating and the output of shift value; Simultaneously; Intelligence differential transformer type sound attitude displacement transducer also can be connected with host computer through communication bus; Host computer is through the described intelligent differential transformer type sound attitude displacement transducer of numbering addressing; Realize exchanges data and processing easily, include numbering in the packet that intelligent differential transformer type sound attitude displacement transducer sends, be convenient to host computer identification and processing.
The control that processor of the present invention can break away from host computer works alone, and accomplishes the measurement and the Processing tasks of certain autonomous time point static object shift value according to its internal processes; Perhaps receive time point operational order, gather the static object shift value of this time point and feed back to host computer from host computer.
The control that processor of the present invention can break away from host computer works alone, and accomplishes the measurement and the Processing tasks of dynamic object shift value in certain autonomous time period according to its internal processes; Perhaps receive operational order, read survey frequency, start time and concluding time information, accomplish the measurement of the dynamic object shift value in this time period and feed back to host computer from the host computer time period.
The invention has the beneficial effects as follows:
(1) direct export target shift value (mm of unit etc.) need not the backstage to handle and calculate, and has reduced the workload on backstage.
(2) secondary coil divides the echelon coiling to end face, and when armature moved toward end face, the electromotive force output of generation was stable, had improved the linear precision of differential transformer.
(3) temperature measurement unit exports the environment temperature that it records to processing unit, and processing unit carries out temperature compensation according to the temperature compensation coefficient of storing in its storage unit to the shift value that calculates gained, has further improved the measuring accuracy of displacement transducer.
(4) cell stores the device numbering of transmitter; Host computer is through the described intelligent differential transformer type sound attitude displacement transducer of numbering addressing; Realize exchanges data and processing easily; Include numbering in the packet that intelligence differential transformer type sound attitude displacement transducer sends, be convenient to host computer identification and processing.
(5) transmitter can break away from the control of host computer, as independent component, independently accomplishes measurement and task for processing according to its internal processes.
Description of drawings
Fig. 1 is traditional differential transformer structural representation;
Fig. 2 is a differential transformer structural representation of the present invention;
Fig. 3 is a structural representation block scheme of the present invention;
Among the figure, 1-primary coil, 2-secondary coil a, 3-secondary coil b, 4-coil rack, 5-magnetic conductive shell, 6-connecting link, 7-armature, 8-coil bore, 9-hollow reservoir.
Embodiment
Further describe technical scheme of the present invention below in conjunction with accompanying drawing: as shown in Figure 3; Intelligence differential transformer type sound attitude displacement transducer; It comprises voltage/current measuring unit, temperature measurement unit, processing unit and storage unit, and voltage/current measuring unit, temperature measurement unit and storage unit are connected with processing unit respectively.The voltage/current measuring unit comprises differential transformer and voltage/current processing module, and the output of differential transformer is connected with the voltage/current processing module, and the output of voltage/current processing module is connected with processing unit; The voltage/current processing module comprises a circuit for signal conditioning and an analog to digital converter, and the output of differential transformer is connected with circuit for signal conditioning, and the output of circuit for signal conditioning is connected with analog to digital converter, and the output of analog to digital converter is connected with processing unit; Circuit for signal conditioning comprises mu balanced circuit, sine-wave generator, detuner and amplifier.Temperature measurement unit comprises a temperature sensor and an analog to digital converter, and the output of temperature sensor is connected with analog to digital converter, and the output of analog to digital converter is connected with processing unit.Processing unit comprises processor and shift value computing module, temperature compensation module and numbering identification module, and processor comprises microprocessor or field programmable gate array PFGA.As shown in Figure 2; Described differential transformer comprises primary coil 1, secondary coil a2, secondary coil b3, coil rack 4, magnetic conductive shell 5, connecting link 6 and is located at the armature 7 on connecting link top that armature 7 is ingot iron armature, ferrite armature or permalloy armature; Coil rack 4 is provided with coil bore 8 near a side of magnetic conductive shell 5; The opposite side of coil rack 4 surrounds hollow reservoir 9; Primary coil 1 is wrapped in the side of coil bore 8 near coil rack 4; Secondary coil a2 and secondary coil b3 symmetry are wrapped in the side of coil bore 8 near magnetic conductive shell 5; The cross section of secondary coil a2 and secondary coil b3 is stepped appearance, and secondary coil a2 and secondary coil b3 press the coiling of incremental manner horizontal symmetrical with the center line of coil bore 8 to two ends respectively, and connecting link 6 is positioned at hollow reservoir 9 with armature 7; Storage unit stores device numbering, calibration line property coefficient and temperature compensation coefficient at least.
The processing unit of intelligence differential transformer type sound attitude displacement transducer can also be connected with host computer through communication bus, is used to accomplish and the communicating by letter of host computer, and communication bus comprises RS-485 bus or CAN bus.
The displacement measurement method of intelligence differential transformer type sound attitude displacement transducer, it may further comprise the steps:
(1) drive displacement is conveyed to armature 7 through connecting link 6 with displacement, and armature 7 is left and right sides translation in hollow reservoir 9, makes to produce difference between the electromotive force of secondary coil a2 and secondary coil b3;
Electromotive Difference Of Potential between (2) two secondary coils exports circuit for signal conditioning to, through regulating back acquisition dc voltage/current value, converts the target number voltage/current signals into and transfers to processing unit through analog to digital converter again;
(3) the real-time ambient temperature value of temperature sensor sensing converts the target number temperature signal into and transfers to processing unit through analog to digital converter;
(4) the calibration line property coefficient of storing in the processor reading cells, the shift value computing module multiplies each other target number voltage/current signals and calibration line property coefficient, obtains the initial displacement value;
(5) processor is read the penalty coefficient under this temperature according to the target number temperature signal, and temperature compensation module obtains the displacement of targets value with initial displacement value and penalty coefficient addition.
Displacement measurement method also can comprise the step that a processing unit is communicated by letter with host computer, and processing unit is sent to host computer with the displacement of targets value through communication bus according to the operational order of host computer.
Intelligence differential transformer type sound attitude displacement transducer can work alone, and independently accomplishes collection, calculating and the output of shift value; Simultaneously; Intelligence differential transformer type sound attitude displacement transducer also can be connected with host computer through communication bus; Host computer is through the described intelligent differential transformer type sound attitude displacement transducer of numbering addressing; Realize exchanges data and processing easily, include numbering in the packet that intelligent differential transformer type sound attitude displacement transducer sends, be convenient to host computer identification and processing.
The control that processor can break away from host computer works alone, and accomplishes the measurement and the Processing tasks of certain autonomous time point static object shift value according to its internal processes; Perhaps receive time point operational order, gather the static object shift value of this time point and feed back to host computer from host computer.The control that processor can break away from host computer works alone, and accomplishes the measurement and the Processing tasks of dynamic object shift value in certain autonomous time period according to its internal processes; Perhaps receive operational order, read survey frequency, start time and concluding time information, accomplish the measurement of the dynamic object shift value in this time period and feed back to host computer from the host computer time period.
Sound attitude displacement transducer is the intelligence integral body of core with existing module integrated becoming with the processing unit, and the control that can break away from host computer works independently, and accomplishes some measurement and task for processing according to its internal processes; Also can communicate through communication bus and host computer; Carry out the measurement of different time points or time period according to the instruction of host computer; Through after the compensation of calibration line property coefficient and temperature compensation coefficient final high precision displacement of targets value being sent to host computer, and then realize the measurement of sound attitude after the collection.
Claims (9)
1. intelligent differential transformer type sound attitude displacement transducer; It is characterized in that: it comprises voltage/current measuring unit, temperature measurement unit, processing unit and storage unit, and voltage/current measuring unit, temperature measurement unit and storage unit are connected with processing unit respectively; The voltage/current measuring unit comprises differential transformer and voltage/current processing module, and the output of differential transformer is connected with the voltage/current processing module, and the output of voltage/current processing module is connected with processing unit; Processing unit comprises processor and shift value computing module, temperature compensation module and numbering identification module; Described differential transformer comprises primary coil (1), secondary coil a (2), secondary coil b (3), coil rack (4), magnetic conductive shell (5), connecting link (6) and is located at the armature (7) on connecting link top; Coil rack (4) is provided with coil bore (8) near a side of magnetic conductive shell (5); The opposite side of coil rack (4) surrounds hollow reservoir (9); Primary coil (1) is wrapped in the side of coil bore (8) near coil rack (4); Secondary coil a (2) and secondary coil b (3) symmetry are wrapped in the side of coil bore (8) near magnetic conductive shell (5); The cross section of secondary coil a (2) and secondary coil b (3) is stepped appearance; Secondary coil a (2) and secondary coil b (3) press the coiling of incremental manner horizontal symmetrical with the center line of coil bore (8) to two ends respectively, and connecting link (6) and armature (7) are positioned at hollow reservoir (9); Storage unit stores device numbering, calibration line property coefficient and temperature compensation coefficient at least.
2. intelligent differential transformer type sound attitude displacement transducer according to claim 1; It is characterized in that: described temperature measurement unit comprises a temperature sensor and an analog to digital converter; The output of temperature sensor is connected with analog to digital converter, and the output of analog to digital converter is connected with processing unit.
3. intelligent differential transformer type sound attitude displacement transducer according to claim 1 is characterized in that: described processing unit also can be connected with host computer through communication bus, and communication bus comprises RS-485 bus or CAN bus.
4. intelligent differential transformer type sound attitude displacement transducer according to claim 1, it is characterized in that: described processor comprises microprocessor or field programmable gate array PFGA.
5. the displacement measurement method of intelligent differential transformer type sound attitude displacement transducer, it is characterized in that: it may further comprise the steps:
(1) drive displacement is conveyed to armature (7) through connecting link (6) with displacement, and armature (7) is in hollow reservoir (9)
The translation of the interior left and right sides makes to produce difference between the electromotive force of secondary coil a (2) and secondary coil b (3);
Electromotive Difference Of Potential between (2) two secondary coils exports circuit for signal conditioning to, through regulating back acquisition dc voltage/current value, converts the target number voltage/current signals into and transfers to processing unit through analog to digital converter again;
(3) the real-time ambient temperature value of temperature sensor sensing converts the target number temperature signal into and transfers to processing unit through analog to digital converter;
(4) the calibration line property coefficient of storing in the processor reading cells, the shift value computing module multiplies each other target number voltage/current signals and calibration line property coefficient, obtains the initial displacement value;
(5) processor is read the penalty coefficient under this temperature according to the target number temperature signal, and temperature compensation module obtains the displacement of targets value with initial displacement value and penalty coefficient addition.
6. the displacement measurement method of intelligent differential transformer type sound attitude displacement transducer according to claim 5; It is characterized in that: it also can comprise the step that a processing unit is communicated by letter with host computer; Processing unit is sent to host computer with the displacement of targets value through communication bus according to the operational order of host computer.
7. the displacement measurement method of intelligent differential transformer type sound attitude displacement transducer according to claim 5; It is characterized in that: described intelligent differential transformer type sound attitude displacement transducer can work alone, and independently accomplishes collection, calculating and the output of shift value; Simultaneously; Intelligence differential transformer type sound attitude displacement transducer also can be connected with host computer through communication bus; Host computer is through the described intelligent differential transformer type sound attitude displacement transducer of numbering addressing; Realize exchanges data and processing easily, include numbering in the packet that intelligent differential transformer type sound attitude displacement transducer sends, be convenient to host computer identification and processing.
8. the displacement measurement method of intelligent differential transformer type sound attitude displacement transducer according to claim 5; It is characterized in that: the control that described processor can break away from host computer works alone, and accomplishes the measurement and the Processing tasks of certain autonomous time point static object shift value according to its internal processes; Perhaps receive time point operational order, gather the static object shift value of this time point and feed back to host computer from host computer.
9. the displacement measurement method of intelligent differential transformer type sound attitude displacement transducer according to claim 5; It is characterized in that: the control that described processor can break away from host computer works alone, and accomplishes the measurement and the Processing tasks of dynamic object shift value in certain autonomous time period according to its internal processes; Perhaps receive operational order, read survey frequency, start time and concluding time information, accomplish the measurement of the dynamic object shift value in this time period and feed back to host computer from the host computer time period.
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| CN 201210017412 CN102589404B (en) | 2012-01-19 | 2012-01-19 | Method for measuring displacement by using intelligent differential transformer-type static and dynamic displacement transducer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103871527A (en) * | 2012-12-14 | 2014-06-18 | 中国核动力研究设计院 | Temperature compensating method used for rod position detector |
| CN104465044A (en) * | 2013-09-17 | 2015-03-25 | 精量电子（深圳）有限公司 | Linear variable differential transformer and winding method thereof |
| CN111751591A (en) * | 2019-03-26 | 2020-10-09 | 能量盒子有限公司 | Measuring sensor, measuring device, identification module, measuring method and calibration method |
| CN113188432A (en) * | 2021-06-25 | 2021-07-30 | 西安联飞智能装备研究院有限责任公司 | LVDT sensor and winding method thereof |
| CN114427824A (en) * | 2021-12-16 | 2022-05-03 | 洛阳轴承研究所有限公司 | Method for measuring axial displacement of magnetic bearing rotor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103871527A (en) * | 2012-12-14 | 2014-06-18 | 中国核动力研究设计院 | Temperature compensating method used for rod position detector |
| CN104465044A (en) * | 2013-09-17 | 2015-03-25 | 精量电子（深圳）有限公司 | Linear variable differential transformer and winding method thereof |
| CN104465044B (en) * | 2013-09-17 | 2017-12-08 | 精量电子（深圳）有限公司 | Linear variable differential sensor and its winding method |
| CN111751591A (en) * | 2019-03-26 | 2020-10-09 | 能量盒子有限公司 | Measuring sensor, measuring device, identification module, measuring method and calibration method |
| CN113188432A (en) * | 2021-06-25 | 2021-07-30 | 西安联飞智能装备研究院有限责任公司 | LVDT sensor and winding method thereof |
| CN113188432B (en) * | 2021-06-25 | 2021-09-14 | 西安联飞智能装备研究院有限责任公司 | LVDT sensor and winding method thereof |
| CN114427824A (en) * | 2021-12-16 | 2022-05-03 | 洛阳轴承研究所有限公司 | Method for measuring axial displacement of magnetic bearing rotor |
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