CN103884266A - LVDT type displacement sensor and vehicle load measuring system and method - Google Patents
LVDT type displacement sensor and vehicle load measuring system and method Download PDFInfo
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- CN103884266A CN103884266A CN201410121193.6A CN201410121193A CN103884266A CN 103884266 A CN103884266 A CN 103884266A CN 201410121193 A CN201410121193 A CN 201410121193A CN 103884266 A CN103884266 A CN 103884266A
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Abstract
The invention discloses an LVDT type displacement sensor and a vehicle load measuring system and method. A sensing core of a movable measuring rod in the LVDT type displacement sensor can move in an inner pipe, accordingly, displacement changing of the movable measuring rod is converted into induced electromotive force changing of a sensing coil outside the inner pipe, then a signal processing terminal can carry out correspondence on induced electromotive force changing and vehicle load weight, and the measuring results of current vehicle load weight are obtained. Due to the sensing type measuring mode, during a running process of a vehicle, the LVDT type displacement sensor obtains the current load weight of the vehicle by measuring in a differential-motion-sensing mode, stable output is achieved, meanwhile, the LVDT type displacement sensor and the vehicle load measuring system and method can be adaptive to severe environment, the measuring results cannot be affected due to interference of dust, and the accuracy of the measuring results of vehicle load is guaranteed.
Description
Technical field
The application relates to sensor and application thereof, relates in particular to a kind of LVDT formula displacement transducer, carload measuring terminals subsystem, carload measuring system and carload measuring method.
Background technology
Along with developing rapidly of logistics business, Automobile Transportation has formed larger industry size.Conventionally, in traffic hazard, part causes because automobile overload travels.Carload is measured the means as guarantee driving safety, and it is subject to extensive concern.Existing a kind of carload measuring method is to adopt ultrasonic type displacement transducer to carry out, its groundwork principle is: ultrasonic type displacement transducer is arranged on the vehicle frame of automobile, ultrasonic type displacement transducer can send ultrasonic signal and arrive the vehicle bridge (as Automobile shaft) relative with vehicle frame above, and can receive the ultrasonic signal being reflected back.According to the mistiming transmitting and receiving, reflect the distance between vehicle bridge and vehicle frame, and then can reflect the load-bearing weight of automobile.
But, in automobile traveling process, in air, can assemble larger dust, in the time that dust is dispersed in the surveyed area of ultrasonic type displacement transducer, dust can produce and stops and reflect ultrasonic signal, thereby ultrasonic type displacement transducer can obtain reflecting the signal of distance between vehicle frame and dust, and not reflect the signal of distance between vehicle bridge and vehicle frame, and then the measurement result of automobile load-bearing weight is inaccurate.
Summary of the invention
The application provides a kind of LVDT formula displacement transducer, carload measuring system and method, to guarantee carload measurement result accuracy.
According to the application's first aspect, the application provides a kind of linear variable difference transformer LVDT formula displacement transducer, comprise: body, movement measuring staff, and, inductive coil, described body comprises: outer tube, and be coaxially nested in the inner tube in this outer tube, described inductive coil is placed in the space between described outer tube and inner tube, described movement measuring staff comprises: fixed bar, and be fixed on the induction core of this fixed bar one end, described fixed bar and body are movable fixing, and be provided with described induction core one end and stretch into described body so that produce electromagnetic induction between described induction core and described inductive coil.
Further, described outer tube one end is fixed with and the linear bearing of the mutually movable assembling of described fixed bar.
Further, the described body part in addition that is positioned at of described fixed bar is arranged with dust cover.
Further, on described fixed bar, be provided with measuring head with the relative one end of described induction core, this measuring head comprises: fix and have the mounting head in movable chamber with described fixed bar, and the ball that is defined in described movable chamber and can rolls in this activity chamber, described mounting head is exposed for described ball at a side opening in described movable chamber.
According to the application's second aspect, the application provides a kind of carload measuring terminals subsystem, comprise: LVDT formula displacement transducer described above, and the initialize signal that is connected with this LVDT formula displacement transducer, is produced with the described LVDT formula displacement transducer of foundation obtains the signal processing terminal of the current load-carrying weight data of automobile.
Further, described signal processing terminal comprises: for described initialize signal being carried out to the current rectifying and wave filtering circuit of rectifying and wave-filtering, being connected to obtain the control chip of corresponding current load-carrying weight data, be connected with this control chip with the display module that described current load-carrying weight data is shown according to the signal after described rectifying and wave-filtering with this current rectifying and wave filtering circuit, and, be connected described current load-carrying weight data to be sent to the wireless communication module of described service centre with described control chip.
Further, described wireless communication module is GPRS module or GPS module.
According to the application's the third aspect, the application provides a kind of carload measuring system, comprise: terminal subsystem described above, and be connected the service centre to carry out the overweight judgement of carload according to the current load-carrying weight data being received from described signal processing terminal with described signal processing terminal by wireless mode.
According to the application's fourth aspect, the application provides a kind of carload measuring method, the method is based on carload measuring system described above, the two ends of described LVDT formula displacement transducer are individually fixed between the vehicle bridge and vehicle frame of automobile, the initialize signal that produces the current load-carrying weight of reflection automobile when described LVDT formula displacement transducer is used for, between described vehicle frame is because of load-carrying and described vehicle bridge, change of distance occurs, described method comprises:
When described LVDT formula displacement transducer, between described vehicle frame is because of load-carrying and described vehicle bridge, change of distance occurs, produce the initialize signal of the described load-carrying weight of reflection;
The initialize signal that described signal processing terminal produces according to described LVDT formula displacement transducer obtains the current load-carrying weight data of automobile and current processing gained load-carrying weight data is sent to service centre by wireless mode;
Described service centre carries out the overweight judgement of carload according to the current load-carrying weight data receiving from described signal processing terminal.
The application's beneficial effect is:
By a kind of LVDT formula displacement transducer, carload measuring system and method are provided, the induction core of the movement measuring staff in LVDT formula displacement transducer can move in inner tube, thereby the change in displacement that makes movement measuring staff converts the induction electromotive force of the inductive coil outside inner tube to and changes, and then signal processing terminal can be corresponding with carload weight by the variation of induction electromotive force, obtain the measurement result of the current load-carrying weight of automobile.Owing to adopting inductive measuring mode, like this, in automobile traveling process, LVDT formula displacement transducer measures the current load-carrying weight of automobile by differential induction mode, there is stable output, can adapt to work under rugged surroundings, can not exert an influence to measurement result because dust disturbs, guaranteed the accuracy of carload measurement result simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of the LVDT formula displacement transducer of the embodiment of the present application.
Fig. 2 is the principle of work schematic diagram of the LVDT formula displacement transducer of the embodiment of the present application.
Fig. 3 is the structural representation of the carload measuring system of the embodiment of the present application.
Fig. 4 is the schematic flow sheet of the carload measuring method of the embodiment of the present application.
Embodiment
By reference to the accompanying drawings the application is described in further detail below by embodiment.
Please refer to Fig. 1, the present embodiment provides a kind of linear variable difference transformer (Linear Variable Differential Transformer, LVDT) formula displacement transducer, mainly comprises: body 1, movement measuring staff 2, and, inductive coil 3.Body 1 comprises: outer tube 11, and be coaxially nested in the inner tube 12 in this outer tube 11.Inductive coil 3 is placed in the space between outer tube 11 and inner tube 12, comprises primary coil 31 and secondary coil 32.Inductive coil 3 is set around on the outer wall of inner tube 12.The design of inductive coil 3 can be as shown in Figure 2, and secondary coil 32 can comprise two opposite polarity subcoils of series connection.Movement measuring staff 2 comprises: fixed bar 21, and be fixed on the induction core 22 of these fixed bar 21 one end, fixed bar 21 is movable fixing with body 1, and is provided with induction core 22 one end and stretches into body 1 so that produce electromagnetic induction between induction core 22 and inductive coil 3.
Particularly, outer tube 11 one end are fixed with and the linear bearing 13 of fixed bar 21 mutually movable assemblings.On fixed bar 21, be provided with measuring head 23 with induction relative one end of core 22.Outer tube 11 offers the Wire outlet end-coer 14 for the cable outlet being connected with inductive coil 3.Body 1 part in addition that is positioned at of fixed bar 21 is arranged with dust cover 4.Owing to being relatively-stationary between linear bearing 13 and outer tube 11, like this, in the time measuring, can effectively avoid the hunt effect between movement measuring staff 2 and body 1, guarantee the accuracy of measuring.
Automobile in the process of moving, vehicle frame can swing in the horizontal direction, and vehicle frame is due to butt measuring head, make measuring head can drive fixed bar to swing in the horizontal direction, and fixed bar is generally rigidity strip piece, the swing energetically of vehicle frame even can make the relative body 1 of fixed bar significantly swing and rupture.For addressing this problem, the measuring head 23 of the present embodiment can comprise: fix and have the mounting head in movable chamber with fixed bar, and the ball that is defined in movable chamber and can rolls in this activity chamber, mounting head is exposed for ball at a side opening in movable chamber.Mounting head is the cavity structure of a side opening, and the undersized of opening is in the size of ball, so that ball only can move and be unlikely to deviate from the movable chamber of mounting head.When ball and vehicle frame butt, vehicle frame swing in the horizontal direction only can make ball roll in measuring head and can not drive fixed bar significantly to swing, and has avoided fixed bar therefore and the problem of fracture.In addition, fixed bar can also adopt the reliable material of hard to process, and further ensures its fastness.
The principle of work of above-mentioned LVDT formula displacement transducer is roughly as following: measuring head is mobile under external component (vehicle frame as used in automobile load-bearing) drives, fixed bar also can move along linear bearing simultaneously, induction core moves under fixed bar drives between primary coil and secondary coil, thereby change the mutual induction amount between primary coil and secondary coil, the induction electromotive force that secondary coil produces changes, like this, because the subcoil polarity of voltage of secondary coil is contrary, the displacement of induction core has just become the real-time differential voltage signal of secondary coil and has exported from cable.The signal processing terminal being connected with LVDT formula displacement transducer can be according to the relation between the differential voltage signal prestoring in storage medium and load-carrying weight, corresponding acquisition and the current carload weight that differential voltage signal is corresponding in real time.
Please refer to Fig. 3, the present embodiment also provides a kind of carload measuring system, comprising: terminal subsystem 5, and service centre 6.Above-mentioned terminal subsystem comprises: LVDT formula displacement transducer 51 described above, and be connected, obtain with the initialize signal that produced according to LVDT formula displacement transducer 51 the signal processing terminal 52 of the current load-carrying weight data of automobile with this LVDT formula displacement transducer 51.Service centre 6 is connected to carry out the overweight judgement of carload according to the current load-carrying weight data being received from signal processing terminal 52 with signal processing terminal 52 by wireless mode.In signal processing terminal 52, current rectifying and wave filtering circuit, process chip and storage medium etc. can be set.Current rectifying and wave filtering circuit carries out rectifying and wave-filtering processing and real-time processing gained differential voltage signal is delivered to process chip for the electric signal that LVDT formula displacement transducer 51 is transmitted.Process chip, according to the real-time differential voltage signal transporting, is searched storage medium, and is obtained the current load-carrying weight data corresponding with real-time differential electrical signals.
When mounted, above-mentioned LVDT formula displacement transducer is installed in the vehicle bridge of automobile, and measuring head butt vehicle frame, when LVDT formula displacement transducer is used for, between vehicle frame is because of load-carrying and vehicle bridge, change of distance occurs, produces the initialize signal of the current load-carrying weight of reflection automobile.
Particularly, signal processing terminal comprises: for above-mentioned initialize signal being carried out to the current rectifying and wave filtering circuit of rectifying and wave-filtering, being connected to obtain the process chip of corresponding current load-carrying weight data according to the signal after rectifying and wave-filtering, to be connected with this process chip with the display module that current load-carrying weight data is shown with this current rectifying and wave filtering circuit, and, be connected current load-carrying weight data to be sent to the wireless communication module of service centre with process chip.Wireless communication module can be GPRS (General Packet Radio Service) (General Packet Radio Service, GPRS) module or GPS (Global Positioning System, GPS) module etc.
Correspondingly, please refer to Fig. 4, the present embodiment also correspondence provides a kind of carload measuring method, and the method is based on carload measuring system described above, and the method comprises:
Step 401, when LVDT formula displacement transducer, between the vehicle frame of automobile is because of load-carrying and the vehicle bridge of automobile, change of distance occurs, produces the initialize signal of the current load-carrying weight of reflection automobile;
Step 402, the initialize signal that signal processing terminal produces according to LVDT formula displacement transducer obtains the current load-carrying weight of automobile, and current processing gained load-carrying weight data is sent to service centre by wireless mode;
Step 403, service centre carries out carload judgement according to the current load-carrying weight data of automobile receiving from signal processing terminal.Service centre can store the automobile freight weight limit data corresponding with automobile, in the time that the current load-carrying weight data of automobile exceedes automobile freight weight limit data, can be judged to be overweight.Certainly, now can require signal processing terminal in the time sending current load-carrying weight data to service centre, need to return to the mark of this automobile of indication, thereby service centre just can find the automobile freight weight limit data that this automobile is corresponding.
Need explanation in addition:
In other embodiment of the application, inductive coil can also be filled in the space between outer tube and inner tube.Outer tube one end is without being fixed with above-mentioned linear bearing, pass and limit fixed bar to prevent the cavity of its swing and only need form in outer tube one end for fixed bar, certainly, need to adopt hard material in the part contacting with fixed bar, as the material such as stainless steel, copper, wear and tear largely avoiding, induction core generally can adopt ferrous material.Sensor can also be fixed on vehicle frame, and measuring head can connect with vehicle bridge.
Above content is the further description of the application being done in conjunction with concrete embodiment, can not assert that the application's concrete enforcement is confined to these explanations.For the application person of an ordinary skill in the technical field, not departing under the prerequisite of the application's design, can also make some simple deduction or replace.
Claims (9)
1. a linear variable difference transformer LVDT formula displacement transducer, it is characterized in that, comprise: body, movement measuring staff, and inductive coil, described body comprises: outer tube, and be coaxially nested in the inner tube in this outer tube, described inductive coil is placed in the space between described outer tube and inner tube, described movement measuring staff comprises: fixed bar, and be fixed on the induction core of this fixed bar one end, described fixed bar and body are movable fixing, and be provided with described induction core one end and stretch into described body so that produce electromagnetic induction between described induction core and described inductive coil.
2. LVDT formula displacement transducer as claimed in claim 1, is characterized in that, described outer tube one end is fixed with the linear bearing with the mutually movable assembling of described fixed bar.
3. LVDT formula displacement transducer as claimed in claim 1, is characterized in that, the described body part in addition that is positioned at of described fixed bar is arranged with dust cover.
4. LVDT formula displacement transducer as claimed in claim 1, it is characterized in that, on described fixed bar, be provided with measuring head with the relative one end of described induction core, this measuring head comprises: fix and have the mounting head in movable chamber with described fixed bar, and the ball that is defined in described movable chamber and can rolls in this activity chamber, described mounting head is exposed for described ball at a side opening in described movable chamber.
5. a carload measuring terminals subsystem, it is characterized in that, comprise: the LVDT formula displacement transducer as described in any one in claim 1 to 4, and the initialize signal that is connected with this LVDT formula displacement transducer, is produced with the described LVDT formula displacement transducer of foundation obtains the signal processing terminal of the current load-carrying weight data of automobile.
6. subsystem as claimed in claim 5, it is characterized in that, described signal processing terminal comprises: for described initialize signal being carried out to the current rectifying and wave filtering circuit of rectifying and wave-filtering, being connected to obtain the control chip of corresponding current load-carrying weight data, be connected with this control chip with the display module that described current load-carrying weight data is shown according to the signal after described rectifying and wave-filtering with this current rectifying and wave filtering circuit, and, be connected described current load-carrying weight data to be sent to the wireless communication module of described service centre with described control chip.
7. subsystem as claimed in claim 6, is characterized in that, described wireless communication module is GPRS module or GPS module.
8. a carload measuring system, it is characterized in that, comprise: the terminal subsystem as described in any one in claim 5-7, and be connected the service centre to carry out the overweight judgement of carload according to the current load-carrying weight data being received from described signal processing terminal with described signal processing terminal by wireless mode.
9. a carload measuring method, it is characterized in that, the method is based on carload measuring system as claimed in claim 6, the two ends of described LVDT formula displacement transducer are individually fixed between the vehicle bridge and vehicle frame of automobile, the initialize signal that produces the current load-carrying weight of reflection automobile when described LVDT formula displacement transducer is used for, between described vehicle frame is because of load-carrying and described vehicle bridge, change of distance occurs, described method comprises:
When described LVDT formula displacement transducer, between described vehicle frame is because of load-carrying and described vehicle bridge, change of distance occurs, produce the initialize signal of the current load-carrying weight of reflection automobile;
The initialize signal that described signal processing terminal produces according to described LVDT formula displacement transducer obtains the current load-carrying weight data of automobile and current processing gained load-carrying weight data is sent to service centre by wireless mode;
Described service centre carries out the overweight judgement of carload according to the current load-carrying weight data receiving from described signal processing terminal.
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| CN201410121193.6A CN103884266A (en) | 2014-03-27 | 2014-03-27 | LVDT type displacement sensor and vehicle load measuring system and method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596471A (en) * | 2014-11-25 | 2015-05-06 | 哈尔滨工程大学 | Plate strain meter for monitoring structural deformation and monitoring device for structural deformation of gate of frozen area |
| TWI576569B (en) * | 2015-01-20 | 2017-04-01 | 金宙科技有限公司 | Vehicle weighting device |
| CN107209045A (en) * | 2015-01-20 | 2017-09-26 | 金宙科技有限公司 | Vehicle load metering device |
| CN107449457A (en) * | 2017-08-30 | 2017-12-08 | 宁波市鄞州通力液压电器厂 | Hydraulic pressure inductive displacement transducer guide pin bushing and its manufacture method |
| CN108398175A (en) * | 2018-03-24 | 2018-08-14 | 深圳市信为科技发展有限公司 | A kind of sensor, system and method for carload measurement |
| CN112344839A (en) * | 2020-10-13 | 2021-02-09 | 同济大学 | Dustproof self-absorption pull rod type displacement sensor |
| CN114111987A (en) * | 2021-12-07 | 2022-03-01 | 南京智鹤电子科技有限公司 | Magnetic field generating device for vehicle load monitoring and using method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5877454A (en) * | 1996-06-25 | 1999-03-02 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Vehicle load measuring apparatus and method |
| CN102425235A (en) * | 2011-10-12 | 2012-04-25 | 北京工业大学 | Anti-pulling universal rolling supporting base |
| CN202814325U (en) * | 2012-08-03 | 2013-03-20 | 深圳市信为科技发展有限公司 | Linear variable differential transformer displacement sensor |
| CN203055161U (en) * | 2012-11-28 | 2013-07-10 | 西安正昌电子有限责任公司 | Internet of things based automobile loading capacity remote monitoring system |
| CN203231806U (en) * | 2013-05-09 | 2013-10-09 | 嘉应学院 | Automobile load dynamic detection device |
| CN203744913U (en) * | 2014-03-27 | 2014-07-30 | 深圳市信为科技发展有限公司 | LVDT type displacement sensor and automobile load measuring system |
-
2014
- 2014-03-27 CN CN201410121193.6A patent/CN103884266A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5877454A (en) * | 1996-06-25 | 1999-03-02 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Vehicle load measuring apparatus and method |
| CN102425235A (en) * | 2011-10-12 | 2012-04-25 | 北京工业大学 | Anti-pulling universal rolling supporting base |
| CN202814325U (en) * | 2012-08-03 | 2013-03-20 | 深圳市信为科技发展有限公司 | Linear variable differential transformer displacement sensor |
| CN203055161U (en) * | 2012-11-28 | 2013-07-10 | 西安正昌电子有限责任公司 | Internet of things based automobile loading capacity remote monitoring system |
| CN203231806U (en) * | 2013-05-09 | 2013-10-09 | 嘉应学院 | Automobile load dynamic detection device |
| CN203744913U (en) * | 2014-03-27 | 2014-07-30 | 深圳市信为科技发展有限公司 | LVDT type displacement sensor and automobile load measuring system |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596471A (en) * | 2014-11-25 | 2015-05-06 | 哈尔滨工程大学 | Plate strain meter for monitoring structural deformation and monitoring device for structural deformation of gate of frozen area |
| TWI576569B (en) * | 2015-01-20 | 2017-04-01 | 金宙科技有限公司 | Vehicle weighting device |
| CN107209045A (en) * | 2015-01-20 | 2017-09-26 | 金宙科技有限公司 | Vehicle load metering device |
| CN107449457A (en) * | 2017-08-30 | 2017-12-08 | 宁波市鄞州通力液压电器厂 | Hydraulic pressure inductive displacement transducer guide pin bushing and its manufacture method |
| CN107449457B (en) * | 2017-08-30 | 2019-09-17 | 宁波市鄞州通力液压电器厂 | Hydraulic inductive displacement transducer guide sleeve and its manufacturing method |
| CN108398175A (en) * | 2018-03-24 | 2018-08-14 | 深圳市信为科技发展有限公司 | A kind of sensor, system and method for carload measurement |
| CN108398175B (en) * | 2018-03-24 | 2023-12-22 | 深圳市信为科技发展有限公司 | Sensor, system and method for measuring load of automobile |
| CN112344839A (en) * | 2020-10-13 | 2021-02-09 | 同济大学 | Dustproof self-absorption pull rod type displacement sensor |
| CN114111987A (en) * | 2021-12-07 | 2022-03-01 | 南京智鹤电子科技有限公司 | Magnetic field generating device for vehicle load monitoring and using method |
| CN114111987B (en) * | 2021-12-07 | 2023-12-26 | 南京智鹤电子科技有限公司 | Magnetic field generating device for monitoring load of vehicle and using method thereof |
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Application publication date: 20140625 |