CN103698059A - Sensing antenna, tension measuring device and load measuring system - Google Patents
Sensing antenna, tension measuring device and load measuring system Download PDFInfo
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- CN103698059A CN103698059A CN201210365756.7A CN201210365756A CN103698059A CN 103698059 A CN103698059 A CN 103698059A CN 201210365756 A CN201210365756 A CN 201210365756A CN 103698059 A CN103698059 A CN 103698059A
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Abstract
The invention discloses a sensing antenna which comprises an elastic material body with a sealed channel, and normal temperature liquid metal inside the sealed channel, wherein the elastic material body is arranged on an object to be measured; when being subjected to tension action, the sealed channel inside the elastic material body has corresponding deformation along with the deformation of the object to be measured; the liquid metal can flow inside the sealed, so that the resonant frequency of the sensing antenna corresponds to the deformation of the sealed channel. In addition, the invention further discloses a tension measuring device and a load measuring system with the antenna. According to the technical scheme of the invention, the antenna can be applied to moving objects or rotating objects.
Description
Technical field
The present invention relates to tonometry field, particularly the load metering system of a kind of sensing antenna, tension measuring device and transfer system.
Background technology
Tension measuring device is a kind of for measuring the equipment of object tension force, specifically can be used for carrying out pressure survey, load measure, Biological measurement and structural behaviour monitoring etc.Generally, tensile measurer comprises a sensing element and a measuring sensor, and by plain conductor, is connected between sensing element and computing element.This sensing element can be a metal forming being positioned on insulation resilient material, during use, by this, the resilient material with metal forming pastes body surface, when deformation of body, drive this metal forming distortion, thereby cause the resistance variations of metal forming, measuring sensor calculates the deformation of object by measuring the resistance variations of this metal forming.
But above-mentioned this tension measuring device cannot be applied on the object of movable object or rotation.Take materiel delivery system as example, for material is measured, need to be at load transmitting device, as arranged a plurality of sensing elements in interval on material conveyor belt, each sensing element is arranged in the unit area of a setting, and owing to connecting by wire between sensing element and measuring sensor, like this along with the movement of load transmitting device, each sensing element is connected and will be wound around with the wire between measuring sensor.This not only affects signal transmission, also likely makes tension measuring device damage.
In order to address this problem, sensing element in tension measuring device is generally the sensing element of pressure drag diaphragm type at present, for example, for being positioned at silicon element processed or the pottery element processed on plastics or stainless steel supporter, and this sensing element is by wire and outside measuring sensor, as Wheatstone bridge (Wheatstone bridge) is connected.Owing to being connected with wire between sensing element and measuring sensor, therefore conventionally sensing element is arranged in to the outside of load conveyer, and keeps released state with load conveyer.Need to arrange an extra mechanical support structure, for the load pressure on load conveyer is transmitted to sensing element simultaneously.Visible, this metering system can increase installation complexity, and because load pressure has passed through middle transmission link, makes measurement result not accurate enough.
Summary of the invention
In view of this, one aspect of the present invention has proposed a kind of sensing antenna, propose on the other hand a kind of tension measuring device and be applied to the load metering system of transfer system, to make tension measuring device not only can be applied to, on stationary object, also can directly apply on mobiles or rotating object.
The sensing antenna that the present invention proposes, comprising: the elastic materials and the normal temperature liquid metal that is positioned at described seal channel with seal channel;
Described elastic materials is for being arranged on the testee that can be out of shape, when being subject to tension force, do the used time, seal channel in described elastic materials can produce with the distortion of testee corresponding deflection, described liquid metal can flow in described seal channel, makes the resonance frequency of described sensing antenna and the deflection of described seal channel corresponding.
In an embodiment of the invention, described tension force sensing antenna is dipole antenna, and the seal channel on described elastic materials is two, forms the bipolar of described antenna.
Preferably, described antenna is passive antenna.
In an embodiment of the invention, described normal temperature liquid metal is eutectic indium gallium alloy EGaIn.
In an embodiment of the invention, described elastic materials is made by silica gel, elastomeric material or plastic material.
In an embodiment of the invention, described elastic materials is dimethyl silicone polymer.
Tension measuring device proposed by the invention, comprises the sensing antenna of transceiver and above-mentioned arbitrary specific implementation form,
Described transceiver is used for electromagnetic signals, and receives the electromagnetic wave signal of described tension force sensing antenna-reflected, and wherein the frequency of the reflection electromagnetic wave signal of Minimal energy loss is the resonance frequency of described antenna.
A load metering system, comprising: velometer, load meter and mentioned strain measurement mechanism; Wherein,
Described tension measuring device has a plurality of tonometry antennas, and described antenna is arranged on each unit area of load conveyer with interval;
Seal channel on described antenna can produce corresponding deflection along with the distortion of load conveyer, and the deflection of the deflection of seal channel during with load conveyer carry load is corresponding;
Described velometer is for the movement velocity of sensing lead conveyer;
Described load meter, for according to the charge capacity on each unit area of load conveyer and described movement velocity, is determined the load flow on load conveyer; Charge capacity on described each unit area of load conveyer is to determine according to the size of the resonance frequency of each antenna of tension measuring device measurement.
Wherein, described tension force sensing antenna sticks on described load conveyer, or is integrated on described load conveyer.
From such scheme, can find out, because having, the tension measuring device in the embodiment of the present invention can produce with the distortion of object under test the antenna of corresponding deformation, and utilize the radio-frequency (RF) identification (RFID in wireless communication field, Radio Frequency Identification) technology, by transceiver, send radio signals identification antenna the read-write resonance frequency data relevant to object under test deflection, and without transceiver is contacted with antenna Mechanical Contact or optics.So just can realize the sensing element (being antenna) of tension measuring device and the wireless connections between measuring sensor (being transceiver), make this tension measuring device not only can be applicable on stationary object, also can be applicable on mobiles or rotating object, and avoided needing in prior art the stressed mechanical support structure being transformed on load measure element by mobiles or rotating object.In addition,, due to the stressed transmission link in the middle of having lacked, therefore improved the accuracy of measuring.
In addition, due to the normal temperature liquid metal seal channel that adopts resilient material to form in embodiments of the invention, make like this to select suitable flexible resilient material according to tension range to be measured, thereby tension measuring device of the present invention can be measured the tension force of multiple scope.In addition, because the elasticity of resilient material is quite large, utilize resilient material to make antenna of the present invention and can measure larger tension force.And use resilient material to make antenna there is distortion reversibility and durability.In addition, by selecting the resilient material of suitable elasticity can also adjust the sensitivity of this antenna.
In addition, can utilize simple soft lithographic (soft lithograhpy) technique to manufacture sensing antenna, and utilize a copy mold can produce a plurality of antennas, this makes cost of goods manifactured of the present invention low.
In addition, because eutectic indium gallium alloy is a kind of low viscous liquid metal alloy, there is at normal temperatures relatively high electric conductivity, and eutectic indium gallium alloy has lower toxicity, so the tension force sensing antenna in the embodiment of the present invention has higher electric conductivity, stronger mechanical stability and higher security while adopting eutectic indium gallium alloy.
In addition, due between the sensing antenna in the embodiment of the present invention and transceiver for wireless connections, therefore when this tension measuring device is applied to Logistic Measures, the sensing antenna of the measurement tension force in this tension measuring device can be integrated on load conveyer, so just reduced the fixing link of independent sensing antenna, and the position holding member of antenna also needn't be set again.
Accompanying drawing explanation
To the person of ordinary skill in the art is more clear that above-mentioned and other feature and advantage of the present invention by describing the preferred embodiments of the present invention in detail with reference to accompanying drawing below, in accompanying drawing:
Fig. 1 is the structural representation of tension force sensing antenna in the embodiment of the present invention.
Fig. 2 is the partial side view of the elastic materials in a kind of job operation of the antenna of tension force sensing shown in Fig. 1.
Fig. 3 is the schematic diagram of the resonance frequency of the antenna that in the embodiment of the present invention, transceiver is measured under differential tension.
Fig. 4 is the structural representation of load metering system in the embodiment of the present invention.
Wherein, accompanying drawing is described as follows:
The second layer 230-bonding agent 211-microfluidic seal channel of the ground floor 220-elastic materials of 110-elastic materials 111,112-microfluidic seal channel 120-normal temperature liquid metal 210-elastic materials
410-tension measuring device 411-tension force sensing antenna 412-transceiver 420-velometer 430-load meter 440-load conveyer
Embodiment
In the embodiment of the present invention, in order to reduce in prior art, need the stressed mechanical support structure being transformed on load measuring unit on mobiles or rotating object, tension measuring device can be directly applied on mobiles or rotating object, consider to adopt wireless connections between the sensing unit of tension measuring device and computing unit.For this reason, present inventor, after performing creative labour, overcomes inertial thinking, considers that radio-frequency (RF) identification (RFID, the Radio Frequency Identification) technology in reference wireless communication field is carried out sensing lead.Radio-frequency (RF) identification claims again electronic tag, radio frequency identification, and it can be identified specific objective and be read and write related data by radio signals, and without setting up machinery between recognition system and specific objective or optics contacts.The technology such as conventional REID has low frequency (125k ~ 134.2K), high frequency (13.56Mhz), ultrahigh frequency, passive.
In order to carry out tonometry, need tension force sensing antenna can realize obvious distortion, for this reason, present inventor, by after a large amount of performing creative labours, considers to adopt normal temperature liquid metal to make tension force sensing antenna.And for the antenna size that normal temperature liquid metal is made can be out of shape, the application and then consideration can be out of shape the carrier that holds this normal temperature liquid metal, consider to use the resilient material of insulation as the carrier of normal temperature liquid metal for this reason.Like this, the tension force sensing antenna in the embodiment of the present invention can comprise: a normal temperature liquid metal that has the elastic materials of seal channel and be positioned at described microfluidic seal channel.Wherein, described elastic materials is used for being arranged on testee, and do the used time when being subject to tension force, seal channel in described elastic materials can produce with the distortion of testee corresponding deflection, described normal temperature liquid metal can flow with the distortion of described seal channel in described seal channel, and the generation resonance frequency corresponding with the deflection of described seal channel.Be described sensing antenna for being arranged on the testee that can produce distortion, and can produce with the distortion of testee corresponding deflection, produce the resonance frequency corresponding with the amount of described distortion.
For making the object, technical solutions and advantages of the present invention clearer, the present invention is described in more detail by the following examples.
Fig. 1 is the structural representation of tension force sensing antenna in the embodiment of the present invention.As shown in Figure 1, the tension force sensing antenna in the present embodiment is dipole antenna, and it comprises: a normal temperature liquid metal 120 that has the elastic materials 110 of two microfluidic seal channels 111,112 and be positioned at described two seal channels 111,112.Preferably, two seal channel 111,112 length are identical, and are arranged on same straight line, and centre has clearance for insulation.The normal temperature liquid metal 120 that is positioned at two seal channels 111,112 forms two wireless wires, and forms whole antenna major axis.This dipole antenna is along with wavelength X produces resonance.Wavelength X is approximately the twice of whole antenna length L, i.e. λ=2L.Wavelength X and antenna length L and resonance frequency are inversely proportional to.
Wherein, described elastic materials 110 is for being arranged on testee, and the seal channel in described elastic materials 110 111,112 can produce with the distortion of testee corresponding deflection, the method that can demarcate is by experiment determined the deflection of described microfluidic seal channel 111,112 and the relation between testee deflection.Described normal temperature liquid metal 120 can be interior mobile at described seal channel 111,112 with the distortion of described seal channel 111,112, and the resonance frequency that has functional relation of the deflection of generation and described microfluidic seal channel 111,112, make the resonance frequency of described tension force sensing antenna corresponding with the deflection of described seal channel.
During specific implementation, normal temperature liquid metal can be eutectic indium gallium alloy EGaIn, or mercury etc.Wherein, because EGaIn is a kind of low viscous liquid metal alloy, there is at normal temperatures relatively high electric conductivity, and EGaIn has lower toxicity, so tension force sensing antenna have higher electric conductivity, stronger mechanical stability and higher security while adopting EGaIn.
In addition, elastic materials can be made by silica gel, elastomeric material or plastic material etc.For example, this elastic materials can be dimethyl silicone polymer (PDMS) etc.
Specifically add man-hour, the sensing of tension force shown in Fig. 1 antenna can have multiple concrete job operation.Fig. 2 shows the partial side view of the elastic materials in its a kind of job operation.As shown in Figure 2, adding man-hour, can first process the two-layer up and down of elastic materials 110, be i.e. ground floor 210 and the second layer 220.Wherein, microfluidic seal channel can be positioned on ground floor 210, also can be positioned on the second layer 220, or, also can a part being positioned on ground floor 210, another part is positioned on the second layer 220.In the present embodiment, the situation that the microfluidic seal channel of take is positioned on ground floor 210 is example, adds man-hour, can first make one with the mould of two linear protrusions, and these two linear protrusions can be positioned on same axis, and the some millimeters of midfeather.In this mould, inject liquid elastomeric material afterwards, and it is cured to the ground floor 210 that for example, obtains elastic materials 110 after (available soft lithographic technique), wherein, the position of two of corresponding model linear protrusions is two seal channels 211 that are positioned on ground floor 210.Afterwards the ground floor 210 with seal channel is sticked together by bonding agent 230 with the second layer 220 with contact with platform face.Then, by Normal Atmospheric Temperature Liquid metal, as EGaIn, inject in two microfluidic seal channels 211, afterwards by the entrance and exit sealing of two microfluidic seal channels 211.
Above are only a kind of job operation of tension force sensing antenna, in addition, can also have other job operation, repeat no longer one by one herein.
Tension measuring device in the embodiment of the present invention, except comprising above-mentioned antenna, also comprises transceiver.Described transceiver is used for electromagnetic signals, and receives the electromagnetic wave signal through antenna-reflected, and transceiver can scan a wider frequency range, and the frequency of the electromagnetic wave signal of the Minimal energy loss of antenna-reflected is the resonance frequency of described antenna.
Further, this transceiver also can be determined the Tensity size on testee according to the resonance frequency of sensing antenna.
Fig. 3 shows the schematic diagram of the resonance frequency of the sensing antenna that in the embodiment of the present invention, transceiver is measured under the tension force of 4 different sizes.Wherein, the position that the trough peak value of every curve is corresponding is the value of 4 resonance frequencies of antenna under corresponding tension force.
During specific implementation, tension measuring device in the embodiment of the present invention due between sensing element (being tension force sensing antenna) and measuring sensor (being transceiver) for wireless connections, therefore it not only can be applicable to, on stationary object, also can be applicable on mobiles or rotating object.In the time of on being applied to mobiles or rotating object, can be directly by sensing element, it is tension force sensing antenna, be set directly on testee, thereby avoided needing in prior art the stressed mechanical support structure being transformed on load measure element by mobiles or rotating object, and due to the stressed conversion links in the middle of having lacked, thereby improved the accuracy of measuring.
Take logistics transfer system as example, and the tension measuring device in the embodiment of the present invention can be used for the load on logistics travelling belt to measure.Fig. 4 is the structural representation of load metering system in the embodiment of the present invention.As shown in Figure 4, this load metering system can comprise: the tension measuring device 410 in the embodiment of the present invention and a velometer 420 and a load meter 430.
Wherein, described tension measuring device 410 has a plurality of tension force sensing antennas 411 as shown in Figure 1, and described a plurality of tension force sensing antenna 411 is for example disposed on, on each unit area of setting of load conveyer (travelling belt 440).Seal channel in the elastic materials of each tension force sensing antenna 411 can be on described load conveyer during carry load the distortion with load conveyer 440 produce corresponding deflection; And the normal temperature liquid metal in described seal channel can flow with the distortion of described seal channel in described seal channel, and the generation resonance frequency corresponding with the deflection of described seal channel.
The transceiver 412 of described tension measuring device 410 is for measuring the size of the resonance frequency of each tension force sensing antenna 411, and the charge capacity in output load conveyer 440 each unit area.For example, unit is kg/m.
Described velometer 420 can be a scrambler, for recording the movement velocity of load conveyer.For example, unit is m/s.
Described load meter 430, for according to the charge capacity in load conveyer 440 each unit area and the movement velocity of described load conveyer 440, is determined load flow current on load conveyer 440.For example, unit is kg/s.
This load meter 430 can also further calculate the accumulative total charge capacity on a period of time internal burden conveyer 440.
During specific implementation, the transceiver 412 of tension measuring device 410 also can be after the size of resonance frequency of measuring each tension force sensing antenna 411, size or the Tensity size corresponding with the size of resonance frequency of resonance frequency are exported to load meter 430, by load meter 430, calculate the charge capacity of load conveyer 440 on each unit area.
In practical application, due between the tension force sensing antenna 411 in the embodiment of the present invention and transceiver 412 for wireless connections, therefore when this tension measuring device 410 is applied to above-mentioned Logistic Measures, tension force sensing antenna 411 in this tension measuring device 410 can be integrated on load conveyer 440, so just reduce the fixing link of independent sensing antenna, and also no longer needed to arrange the position holding member of antenna.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a sensing antenna, comprising: the elastic materials and the normal temperature liquid metal that is positioned at described seal channel with seal channel;
Described elastic materials is for being arranged on the testee that can produce distortion, when being subject to tension force, do the used time, seal channel in described elastic materials can produce with the distortion of testee corresponding deflection, described liquid metal can flow in described seal channel, makes the resonance frequency of described antenna and the deflection of described seal channel corresponding.
2. antenna according to claim 1, is characterized in that, described sensing antenna is dipole antenna, and the seal channel on described elastic materials is two, forms the bipolar of described antenna.
3. antenna according to claim 1 and 2, described antenna is passive antenna.
4. antenna according to claim 1 and 2, is characterized in that, described normal temperature liquid metal is eutectic indium gallium alloy EGaIn.
5. antenna according to claim 1 and 2, is characterized in that, described elastic materials is made by silica gel, elastomeric material or plastic material.
6. antenna according to claim 5, is characterized in that, described elastic materials is dimethyl silicone polymer.
7. a tension measuring device, comprises transceiver and the antenna as described in any one in claim 1 to 6,
Described transceiver is for electromagnetic signals, and receives the electromagnetic wave signal of described antenna-reflected, the resonance frequency that wherein frequency of the minimum reflection electromagnetic wave signal of energy loss is described antenna.
8. a load metering system, comprising: velometer, load meter and tension measuring device as claimed in claim 7; Wherein,
Described tension measuring device has a plurality of tonometry antennas, and described antenna is arranged on each unit area of load conveyer with interval;
Seal channel on described antenna can produce corresponding deflection along with the distortion of load conveyer, and the deflection of the deflection of seal channel during with load conveyer carry load is corresponding;
Described velometer is for the movement velocity of sensing lead conveyer;
Described load meter is for determining the load flow on load conveyer according to the charge capacity on each unit area of load conveyer and described movement velocity; Charge capacity on described each unit area of load conveyer is to determine according to the size of the resonance frequency of each antenna of tension measuring device measurement.
9. system according to claim 8, is characterized in that, described antenna is pasted or is integrated on described load conveyer.
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| CN201210365756.7A CN103698059A (en) | 2012-09-27 | 2012-09-27 | Sensing antenna, tension measuring device and load measuring system |
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| CN201210365756.7A CN103698059A (en) | 2012-09-27 | 2012-09-27 | Sensing antenna, tension measuring device and load measuring system |
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Cited By (6)
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| CN107365430A (en) * | 2016-05-12 | 2017-11-21 | 云南科威液态金属谷研发有限公司 | Application and electrically conductive elastic deformation vulcanization rubber of the liquid metal in conductive rubber is prepared |
| CN108151640A (en) * | 2018-01-17 | 2018-06-12 | 中国科学院宁波材料技术与工程研究所 | Application, electronic surveying ruler and measuring method of the elastic conductor in measuring scale |
| CN108390150A (en) * | 2018-02-11 | 2018-08-10 | 哈尔滨工业大学 | A kind of preparation method of telescopic frequency reconfigurable liquid metal antenna and the antenna |
| CN110537276A (en) * | 2017-03-28 | 2019-12-03 | 株式会社斯库林集团 | Carry amount determining device and carrying quantity measuring method |
| WO2020109372A1 (en) * | 2018-11-28 | 2020-06-04 | Contitech Transportbandsysteme Gmbh | Metal or rubber resonators for use in monitoring conveyor belt wear and longitudinal rip sensor systems |
| CN108151640B (en) * | 2018-01-17 | 2024-04-16 | 中国科学院宁波材料技术与工程研究所 | Application of elastic conductor in measuring ruler, electronic measuring ruler and measuring method |
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| CN107365430A (en) * | 2016-05-12 | 2017-11-21 | 云南科威液态金属谷研发有限公司 | Application and electrically conductive elastic deformation vulcanization rubber of the liquid metal in conductive rubber is prepared |
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| CN110537276B (en) * | 2017-03-28 | 2021-12-14 | 株式会社斯库林集团 | Load capacity measuring device and load capacity measuring method |
| CN108151640A (en) * | 2018-01-17 | 2018-06-12 | 中国科学院宁波材料技术与工程研究所 | Application, electronic surveying ruler and measuring method of the elastic conductor in measuring scale |
| CN108151640B (en) * | 2018-01-17 | 2024-04-16 | 中国科学院宁波材料技术与工程研究所 | Application of elastic conductor in measuring ruler, electronic measuring ruler and measuring method |
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| US11420826B2 (en) | 2018-11-28 | 2022-08-23 | Contitech Transportbandsysteme Gmbh | Metal or rubber resonators for use in monitoring conveyor belt wear and longitudinal rip sensor systems |
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Application publication date: 20140402 |