CN108709604A

CN108709604A - A kind of material level detection method and device

Info

Publication number: CN108709604A
Application number: CN201810521172.1A
Authority: CN
Inventors: 胡淼龙; 周顺权; 周潇
Original assignee: ZHEJIANG WINS WIRELESS NETWORK TECHNOLOGY Co Ltd
Current assignee: ZHEJIANG WINS WIRELESS NETWORK TECHNOLOGY Co Ltd
Priority date: 2018-05-28
Filing date: 2018-05-28
Publication date: 2018-10-26

Abstract

The present invention provides a kind of material level detection method and device, the method includes：The capacitance parameter of the corresponding first material-level measure capacitor of the first material-level measure point is obtained, the capacitance parameter of the corresponding second material-level measure capacitor of the second material-level measure point is obtained；The material position state at the first material-level measure point is determined using the capacitance parameter of the first and second material-level measures capacitor；Or, determining the material position state at the second material-level measure point using the capacitance parameter of the first and second material-level measures capacitor.It is complicated to overcome the existing calibration of existing capacitance charge level detection technique, the low disadvantage of reliability, and it is at low cost, there is practicability.

Description

A kind of material level detection method and device

Technical field

The present invention relates to automatic detection field more particularly to a kind of material level detection methods and device.

Background technology

Feed bin includes filler bin, silo, viscous body feed bin and liquid cabin etc., and the usual form of feed bin is storage tank, storing Tank has production storage tank and storage storage tank.These storage tanks are from using in terms of industry, including cement storage/processing, feed Storage/processing, food storage/processing, industrial chemicals storage/production, petroleum storage/production, medicine production and processing and tobacco Production etc..

There are many material level detection methods of traditional storage bin or storage tank, including：Steel wire rope hangs heavy bucket altimetry, tuning fork Method and stall motor method etc..Currently, there is pressure sensor method, supercritical ultrasonics technology, radar range finding method and capacitance charge level sensing Device method etc..

Capacitive material level transducer method has the characteristics that low cost, small power consumption, capacitance type sensor method are to utilize capacitance pole What the change of the dielectric constant between plate measured, it is using powder/material as medium, when the height change of powder/material When, the dielectric constant of capacitance type sensor changes, to output signal, when powder/material reaches warning height, both Send out alarm signal.There is following capacitive material level transducer technology in industry at present：

Application No. is CN201710051097.2, the patent application of entitled " a kind of bulk material material-level detecting device " is public A kind of bulk material material-level detecting device has been opened, including：It is obliquely welded in the areole periphery of tank body, and is provided with centre bore Clip lower end；It is closely inserted into the centre bore of the clip lower end, and is provided with the threaded closure of threaded hole；Described in screw-in Threaded hole, and across the capacitance level meter of the areole；The threaded closure is pressed in the clip lower end Clip upper end；The clip lower end and the clip upper end are fixed in clip together.The present invention can be in material It is accurately detected under the adverse circumstances of high viscosity and high vibration, facilitates on-line cleaning.

Application No. is CN201320194813.X, the patent Shen of entitled " a kind of rice bin-level detection device " A kind of rice bin-level detection device please be disclose, rice processing equipment technical field is belonged to, is equipped on rice feed bin Upper limit capacitance sensor and lower limit capacitance sensor；Upper limit capacitance sensor is electrically connected through relay with upper limit indicator light；Lower limit Capacitance sensor is electrically connected through relay with lower limit indicator light.The technical principle of the utility model is：When on the rice in feed bin When being raised near upper limit capacitance sensor, upper limit capacitance sensor detects that capacitance changes, then is started by relay Upper limit indicator light notifies the amount of rice in staff's feed bin excessive, needs to dredge in time；Under the rice in feed bin drops to Ration the power supply hold sensor proximity when, lower limit capacitance sensor detects that capacitance changes, then by relay start lower limit refer to Show lamp, notify the amount of rice in staff's feed bin very few, needs that rice raw material is replenished in time；It can thus ensure well The amount of rice is in a suitable amount always in feed bin.

Application No. is CN200420079211.0, the patent application of entitled " elctric capacity type powder material detection instrument " is adopted With reference capacitance, reference capacitance signal u1 and detection capacitance signal u2 are inputted into differential amplifier circuit, pass through differential amplifier circuit Interference signal is omitted, its useful signal is taken, when powder arrival alert locations, that is, sends out alarm.

Application No. is CN97213743.2, the patent application of entitled " capacitive material level transducer " includes detection electricity Road, multi-resonant oscillating circuit, single-shot trigger circuit, two input terminal AND gate circuits and power supply, detection circuit include detection capacitance and Resistance, one end of detection capacitance are connected on shell, and the other end connects with resistance, and the output end of two input terminal AND gate circuits is that detection is believed Number output end;Its is simple in structure, easy to use, and sensitivity is higher, and debugging is simple, power consumption is low, and application range is wider, can use extensively In metal of the relative dielectric constant more than or equal to 1.2 or nonmetallic or liquid or solid or graininess or powder shape equal objects The material-level measure of matter.

The measurement accuracy of existing capacitance type sensor method is influenced by storage tank form, ambient humidity and humidity of materials Greatly, it in order to reach the reliability that the material position of actual needs identifies, needs using complicated calibration process and material position identification certainty It is difficult to ensure；Existing capacitance sensor cannot estimate more accurate material position position, and not there is also material position evaluated error is big It can realize the flexible transmission of the advanced treating and material position information of sensor information.

The present invention provides a kind of material level detection method and device, for overcoming existing for existing capacitance charge level detection technique Calibration is complicated, material position identification certainty is low, material position evaluated error is big, can not achieve the advanced treating of sensor information and flexible Information sends at least one of these disadvantages.

Invention content

The present invention provides a kind of material level detection method, includes the following steps：

Step S110 obtains the capacitance parameter of the corresponding first material-level measure capacitor of the first material-level measure point, obtains the second material The capacitance parameter of the corresponding second material-level measure capacitor of position test point；

Step S120 is determined using the capacitance parameter of the first and second material-level measures capacitor at the first material-level measure point Material position state；Or

The material position state at the second material-level measure point is determined using the capacitance parameter of the first and second material-level measures capacitor；

Wherein, installation site of the corresponding first material-level measure capacitor of the first material-level measure point on storage tank is higher than the Installation site of the corresponding second material-level measure capacitor of 2 material-level measure points on storage tank；

The corresponding first material-level measure capacitor of the first material-level measure point includes being installed with position with the first material-level measure point Or the material-level measure capacitor for waiting height to install；

The corresponding second material-level measure capacitor of the second material-level measure point includes being installed with position with the second material-level measure point Or the material-level measure capacitor for waiting height to install；

The capacitance parameter of the material-level measure capacitor includes the capacitance of the capacitor, derived from the capacitance by the capacitor In voltage value derived from current value derived from frequency of oscillation, the capacitance by the capacitor and the capacitance by the capacitor extremely Few one kind.

The present invention provides a kind of material-level detecting device, including following module：

Capacitance parameter acquisition module 200, material position processing module 230；Wherein,

Capacitance parameter acquisition module 200, the capacitance for obtaining the corresponding first material-level measure capacitor of the first material-level measure point Parameter, and the capacitance parameter of the corresponding second material-level measure capacitor of the second material-level measure point is obtained, including receiving circuit Module；

Material position processing module 230, for determining the first material using the capacitance parameter of the first and second material-level measures capacitor Material position state at the test point of position；Or, determining the second material using the capacitance parameter of the first and second material-level measures capacitor Material position state at the test point of position；Including material position state determination sub-module 231；

The method and device that the embodiment of the present invention provides can overcome the existing calibration of existing capacitance charge level detection technique Complexity, material position identification certainty are low, material position evaluated error is big, can not achieve the advanced treating of sensor information and flexible information Send at least one of these disadvantages.It is at low cost, there is practicability.

Other features and advantages of the present invention will be illustrated in the following description.

Description of the drawings

Fig. 1 is a kind of material level detection method flow chart that the embodiment of the present invention provides；

Fig. 2 is a kind of material-level detecting device composition schematic diagram that the embodiment of the present invention provides；

Fig. 3 is a kind of material-level detecting device application schematic diagram that the embodiment of the present invention provides.

Specific implementation mode

The present invention provides a kind of material level detection method and device, for overcoming existing for existing capacitance charge level detection technique Calibration is complicated, material position identification certainty is low, material position evaluated error is big, can not achieve the advanced treating of sensor information and flexible Information sends at least one of these disadvantages.It is at low cost, there is practicability.

In the Shi Lizhong that the present invention provides, the material position is the material position in storage bin or storage tank.Feed bin include filler bin, The usual form of silo, viscous body feed bin and liquid cabin etc., feed bin is storage tank, and storage tank has production storage tank and storage to use Storage tank；These storage tanks from using in terms of industry, including cement storage/processing, feed storage/processing, food storage/processing, Industrial chemicals storage/production, petroleum storage/production, medicine production and processing and tobacco leaf production etc..

In the embodiment that the present invention provides, material is the metal or nonmetallic substance that relative dielectric constant is more than or equal to 1.1, Its specific form includes any one of liquid, solid, graininess object and powder shape object；Specifically, material be grain, Any one of feed and industrial chemicals.

Currently, outstanding problem existing for capacitance charge level detection technique is：Since the capacitance of capacitance type sensor is to storage The size of batch can, planform and material variety, humidity of materials are very sensitive inside the Pass, in order to accurately identify whether material position reaches material Position test point, needs to different batch cans and the same material of the same batch can under different humidity to capacitance type sensor Capacitance（Or the parameters such as frequency of oscillation, voltage, electric current derived from capacitance）It is demarcated, even if in addition, after calibration, With the bonding of material on the capacitor inside the Pass, and the accuracy of measurement of material position is caused to be difficult to ensure.This is that current industry faces Technical barrier.

To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the reality of the present invention Example is applied to be described in detail.It should be noted that in the absence of conflict, the spy in embodiment and embodiment in the application Sign mutually can be combined arbitrarily.

Below in conjunction with the accompanying drawings, material level detection method provided by the invention citing, device citing are illustrated.

Embodiment one, a kind of material level detection method citing

Shown in Figure 1, a kind of material level detection method embodiment provided by the invention includes the following steps：

In the present embodiment, the first material-level measure point and the second material-level measure point are that the material position being arranged on storage tank is retouched It states and reference point, these material position descriptions is used to be set gradually in storage tank upper edge storage tank short transverse with reference point, each material position inspection The height of measuring point to batch can bottom or top is it is known that spacing or difference in height between material-level measure point are known；

Further, the arrangement mode of material-level measure point is on same vertical line, or not on same vertical line.

In general, a material-level measure point corresponds at least one material-level measure capacitor, one of material-level measure capacitor It is laid with position or with height with the material-level measure point；

When a material-level measure point corresponds to two or more material-level measure capacitors, one of material-level measure capacitance Device is laid with the material-level measure point with position or with height, another is in the upside of the material-level measure point or downside is laid and it Difference in height or distance between installation position and the position of the material-level measure point are known.

The mode for the determination material position that the present invention provides includes：Utilize the corresponding material-level measure capacitor of different material-level measure points The rough position for determining material position determines the subdivision of material position using the corresponding different material-level measure capacitors of the same material-level measure point Position；

The material position that the rough position of the material position only provides has arrived the judgement of the position of some material-level measure point, the specific location of material position It is above, is any equal to or less than the material-level measure point position；

The subdivision position of the material position then provides judgement of the material position to the specific distance of some material-level measure point, that is, provides material position phase For the specific distance of material-level measure point position.

In general, when a material-level measure point corresponds to two or more material-level measure capacitors, it is laid in material position The upside of test point or the material-level measure capacitor of downside cloth and the material-level measure capacitor being laid at material-level measure point are common Specific height for determining material position in storage tank.

Further, when a material-level measure point corresponds to two or more material-level measure capacitors, the material The capacitance parameter of position sensing capacitor is sent to using the same processing circuit processes or by the same radio sending module Any one of wireless router, wireless terminal and wireless base station.

The method that the present invention provides, wherein

The capacitance parameter of the corresponding first material-level measure capacitor of the first material-level measure point is obtained, and obtains the second material-level measure The realization method of the capacitance parameter of the corresponding second material-level measure capacitor of point includes：

It is obtained by wire channel；Or

It is obtained by wirelessly or non-wirelessly channel.

The method that the present invention provides, wherein

Between capacitance parameter acquisition module 200 and at least one of capacitance parameter measurement module 221 and 221a there are wired or Radio connection, capacitance parameter acquisition module 200 obtain corresponding first material position of the first material-level measure point by the electrical connection and examine The capacitance parameter of capacitor is surveyed, and obtains the capacitance parameter of the corresponding second material-level measure capacitor of the second material-level measure point.

Exist between material position processing module 230 and capacitance parameter acquisition module 200 and be electrically connected, to coming from material position processing module The capacitance parameter of 230 the first material-level measure capacitor and the capacitance parameter of the second material-level measure capacitor handled with Obtain material position state.

The installation position of capacitance parameter acquisition module 200 and material position processing module 230 in practical applications includes：

On storage tank, it is located near storage tank, is located in the computer processor of distal end.

The method that the present invention provides, wherein

The capacitance parameter for obtaining the corresponding first material-level measure capacitor of the first material-level measure point, obtains the second material-level measure The capacitance parameter of the corresponding second material-level measure capacitor of point, specifically includes：

The capacitance of the first and second corresponding material-level measure capacitors of material-level measure point is obtained by wirelessly or non-wirelessly channel Parameter；

The capacitance parameter of the corresponding first material-level measure capacitor of the first material-level measure point be included in material position be in be less than, etc. In with higher than the capacitance parameter under the state of at least one of the first material-level measure capacitor position；

The capacitance parameter of the corresponding second material-level measure capacitor of the second material-level measure point be included in material position be in be less than, etc. In with higher than the capacitance parameter under the state of at least one of the second material-level measure capacitor position.

Specifically, described that the corresponding material position inspection of first and second material-level measure points is obtained by wirelessly or non-wirelessly channel Survey the capacitance parameter of capacitor, including following at least one step：

Obtain the material position being located in the first and second corresponding material-level measure capacitors of material-level measure point at material-level measure point The capacitance parameter of sensing capacitor；

Obtain be located in the first and second corresponding material-level measure capacitors of material-level measure point on the upside of material-level measure point or The capacitance parameter of the material-level measure capacitor of downside；And

Obtain the handling result of the first and second corresponding capacitance parameter processing modules of material-level measure point, the handling result packet Subdivision location information containing the material position.

Wherein, the capacitance parameter processing module is located at material-level measure point or positioned at storage tank scene.

The method that the present invention provides, wherein

It is described to determine the material at first or second material-level measure point using the capacitance parameter of the first and second material-level measure capacitors Position state, including material position slightly sentence step and material position and carefully sentence at least one of step step.

Specifically, the material position slightly sentences step, including：

In fill process, using material position be in be less than, equal to and above the second material-level measure capacitor position when correspond to The capacitance that is currently exported with the first material-level measure capacitor of at least one of the capacitance parameter of the second material-level measure capacitor Parameter is matched, and determines whether material position reaches the first material-level measure point according to matching result；Or

During discharging, it is in using material position and is higher than, is equal to and less than the first material-level measure capacitor position when corresponds to The capacitance that is currently exported with the second material-level measure capacitor of at least one of the capacitance parameter of the first material-level measure capacitor Parameter is matched, and determines whether material position reaches the second material-level measure point according to matching result.

Specifically, the material position carefully sentences step, including：

In fill process, using material position be in be less than, equal to and above the second material-level measure capacitor position when correspond to The capacitance that is currently exported with the first material-level measure capacitor of at least one of the capacitance parameter of the second material-level measure capacitor Parameter is matched, and estimates specific location of the material position relative to the first material-level measure point according to matching result；Or

During discharging, it is in using material position and is higher than, is equal to and less than the first material-level measure capacitor position when corresponds to The capacitance that is currently exported with the second material-level measure capacitor of at least one of the capacitance parameter of the first material-level measure capacitor Parameter is matched, and estimates specific location of the material position relative to the second material-level measure point according to matching result.

Specifically, the capacitance parameter currently exported with the first material-level measure capacitor is matched, and is included the following steps：

Judge the capacitance parameter of the second material-level measure capacitor and capacitance parameter that the first material-level measure capacitor currently exports it Between difference whether be less than subscribe matching thresholding or the difference with first and two material-level measure capacitor output capacitance parameter Whether the ratio of the higher value in value is less than the matching thresholding subscribed, if so, both capacitance parameters are judged to match, it is no Then, it is judged to mismatch；

Wherein, the matching thresholding of the reservation, a kind of specific implementation include：

Matching error thresholding be first and two the output of material-level measure capacitor capacitance parameter value difference and first and two material positions The ratio of higher value in the capacitance parameter value of sensing capacitor output, and the ratio is between 0.1% value 30%；

Preferably, and the ratio is between 1% value 10%.

Specifically, the capacitance parameter currently exported with the second material-level measure capacitor is matched, including is walked as follows Suddenly：

Judge the capacitance parameter of the first material-level measure capacitor and capacitance parameter that the second material-level measure capacitor currently exports it Between difference whether be less than subscribe matching thresholding or the difference with first and two material-level measure capacitor output capacitance parameter Whether the ratio of the higher value in value is less than the matching thresholding subscribed, if so, both capacitance parameters are judged to match, it is no Then, it is judged to mismatch；

Preferably, and the ratio is between 1% value 10%.

The method that the present invention provides, wherein

The material position slightly sentences step, further comprises：

It is corresponding when being less than when material position is in, being equal to and above the second material-level measure capacitor position in fill process At least one of capacitance parameter of second material-level measure capacitor is joined with the capacitance that the first material-level measure capacitor currently exports When several matching errors is less than the matching error thresholding subscribed, judgement material position reaches the first material-level measure point position, otherwise, it is determined that Material position does not reach the first material-level measure point position；

And/or

It is corresponding when being less than when material position is in, being equal to and above the first material-level measure capacitor position during discharging At least one of capacitance parameter of first material-level measure capacitor is joined with the capacitance that the second material-level measure capacitor currently exports When several matching errors is less than the matching error thresholding subscribed, judgement material position reaches the second material-level measure point position, otherwise, it is determined that Material position does not reach the second material-level measure point position.

The method that the present invention provides, wherein

The material position carefully sentences the tool according to matching result estimation material position relative to first or second material-level measure point that step includes The step of body position, specifically includes：

Sub-step 1 is in using material position corresponding second when being less than, being equal to and above the second material-level measure capacitor position At least one of the capacitance parameter of material-level measure capacitor determines change curve of the capacitance parameter with material position, uses the variation Curve determines the intermediate value Cm of capacitance parameter, when intermediate value Cm is equal to the second material-level measure capacitor position as material position The capacitance parameter of second material-level measure capacitor；

Sub-step 2 is determined when the capacitance parameter value that the second material-level measure capacitor exports is intermediate value Cm, the first material-level measure electricity The capacitance parameter value Cl of container output, the installation position of the installation site of the material-level measure capacitor and the second material-level measure capacitor Difference in height between setting is H, with the difference △ b of the capacitance parameter Cl and intermediate value Cm of the capacitance parameter of the material-level measure capacitor Removal height difference H obtains ratio R, using ratio R as the corresponding controlling level variable quantity of specific capacitance Parameters variation amount；

Sub-step 3, the capacitance parameter Cc currently exported using ratio R and current first material-level measure capacitor and the first material position are examined The difference △ c for surveying the intermediate value Cm of the capacitance parameter of capacitor determine specific location of the material position relative to the first material-level measure point；

Or

Sub-step A is in using material position corresponding first when being less than, being equal to and above the first material-level measure capacitor position At least one of the capacitance parameter of material-level measure capacitor determines change curve of the capacitance parameter with material position, uses the variation Curve determines the intermediate value Cm of capacitance parameter, when intermediate value Cm is equal to the first material-level measure capacitor position as material position The capacitance parameter of first material-level measure capacitor；

Sub-step B is determined when the capacitance parameter value that the first material-level measure capacitor exports is intermediate value Cm, the second material-level measure electricity The capacitance parameter value Ch of container, between the installation site of the material-level measure capacitor and the installation site of the first material-level measure capacitor Difference in height be H, with the difference △ b of the capacitance parameter Ch and intermediate value Cm of the capacitance parameter of the second material-level measure capacitor Removal height difference H obtains ratio R, using ratio R as the corresponding controlling level variable quantity of specific capacitance Parameters variation amount；

Sub-step C, the capacitance parameter Cc currently exported using ratio R and the second material-level measure capacitor and the second material-level measure electricity The difference △ c of the intermediate value Cm of the capacitance parameter of container determine specific location of the material position relative to the second material-level measure point.

Specifically, sub-step 1~3 is carefully sentenced for the material position of fill process, material positions of the sub-step A~C for the process that discharges Carefully sentence.

Specifically, the judgement material position reaches the first material-level measure point position, and judgement material position reaches the inspection of the second material position Point position is the rough position for the material position determined using the corresponding material-level measure capacitor of different material-level measure points, this is thick Slightly position only provides the judgement that material position has arrived the position of some material-level measure point, and the specific location of material position is above, is equal to Or it is any less than the material-level measure point position；

Specifically, it described in sub-step 1, is in and is less than, equal to and above where the second material-level measure capacitor using material position At least one of the capacitance parameter of corresponding second material-level measure capacitor determines change of the capacitance parameter with material position when position Change curve, including：

The two or more capacitance parameters exported using the second material-level measure capacitor determine capacitance parameter with material position Change curve, these capacitance parameters are that material position is in and is less than, equal to and above in the second material-level measure capacitor position At least one state under the second material-level measure capacitor export capacitance parameter；

Preferably, it is approximately straight-line segment with the change curve of material position by the capacitance parameter, that is, by capacitance parameter with material position Variation is approximate to be handled as linear change.

Specifically, described in sub-step 2, joined with the capacitance of the capacitance parameter Cl and the first material-level measure capacitor The difference △ b removals height difference H of several intermediate value Cm obtains ratio R, and concrete operation method is：

△b= |Cl-Cm|,

R=H/△b；

Wherein, Cm be the first material-level measure capacitor capacitance parameter intermediate value, the Cm be actual measurement obtain or directly use second Cms of the Cm of material-level measure capacitor as the first material-level measure capacitor；

When using Cms of the Cm of the second material-level measure capacitor as the first material-level measure capacitor, it is assumed that the first and second material Position sensing capacitor has identical or approximate capacitance parameter with the change curve of material position.

Specifically, described in sub-step 3, the electricity that is currently exported using ratio R and current first material-level measure capacitor The difference △ c for holding the intermediate value Cm of the capacitance parameter of parameter Cc and the first material-level measure capacitor determine that material position is examined relative to the first material position The specific location of measuring point, including following concrete operation method：

△c=|Cc-Cm|,

D = △c *R;

Wherein, D is distance of the material position to the first material-level measure point；

When Cc-Cm is positive value, D is the distance that material position is less than the first material-level measure point；

When Cc-Cm is negative value, D is the distance that material position is higher than the first material-level measure point；

When Cc-Cm is zero, D=0 shows that material position is equal to 0 value at a distance from the first material-level measure point.

Specifically, it described in sub-step A, is in and is less than, equal to and above where the first material-level measure capacitor using material position At least one of the capacitance parameter of corresponding first material-level measure capacitor determines change of the capacitance parameter with material position when position Change curve, including：

The two or more capacitance parameters exported using the first material-level measure capacitor determine capacitance parameter with material position Change curve, these capacitance parameters are that material position is in and is less than, equal to and above in the first material-level measure capacitor position At least one state under the first material-level measure capacitor export capacitance parameter；

Specifically, described in sub-step B, joined with the capacitance of the capacitance parameter Cl and the second material-level measure capacitor The difference △ b removals height difference H of several intermediate value Cm obtains ratio R, and concrete operation method is：

△b= |Cl-Cm|,

R=H/△b；

Wherein, Cm be the second material-level measure capacitor capacitance parameter intermediate value, the Cm be actual measurement obtain or directly use first Cms of the Cm of material-level measure capacitor as the second material-level measure capacitor；

When using Cms of the Cm of the first material-level measure capacitor as the second material-level measure capacitor, it is assumed that the first and second material Position sensing capacitor has identical or approximate capacitance parameter with the change curve of material position.

Specifically, described in sub-step C, the electricity that is currently exported using ratio R and current second material-level measure capacitor The difference △ c for holding the intermediate value Cm of the capacitance parameter of parameter Cc and the second material-level measure capacitor determine that material position is examined relative to the second material position The specific location of measuring point, including following concrete operation method：

△c=|Cc-Cm|,

D = △c *R;

Wherein, D is distance of the material position to the second material-level measure point；

When Cc-Cm is positive value, D is the distance that material position is less than the second material-level measure point；

When Cc-Cm is negative value, D is the distance that material position is higher than the second material-level measure point；

When Cc-Cm is zero, D=0 shows that material position is equal to 0 value at a distance from the second material-level measure point.

The method that the present invention provides further includes material-level measure wake-up trigger method, specifically comprises the following steps：

Wake up trigger signal is generated using vibrating power-generation submodule, the trigger signal that wake up trigger signal acts on wake-up circuit is defeated Enter end, at least part circuit of the wake-up circuit under wake up trigger signal effect into material-level detecting device sends out wake-up letter Number.

Further, at least part of the wake-up circuit under wake up trigger signal effect into material-level detecting device Circuit sends out wake-up signal, including：

The wake-up circuit enters under wake up trigger signal effect wakes up acknowledgement state, and wake-up circuit is in the case where waking up acknowledgement state Wake-up condition is further confirmed that, only after wake-up condition is confirmed, wake-up circuit into material-level detecting device extremely Few a part of circuit sends out wake-up signal.

Further, the wake-up circuit further confirms that wake-up condition in the case where waking up acknowledgement state, including as follows At least one step：

The output for reading vibrating sensor is completed after confirming the vibration signal that vibrating sensor output is subscribed to wake-up condition Further confirm that；

It receives and is instructed by the wake-up trigger that wireless channel is sent, after receiving the wake-up trigger instruction, completed to waking up Condition further confirms that.

The wake-up trigger instruction is sent to radio corresponding with the wake-up circuit by wireless transmitter module or base station Receiving module；

Specifically, by vibration sensing position vibrating power-generation submodule and any one of vibroswitch generate wake-up Trigger signal, or by vibrating power-generation submodule, vibroswitch, Hall switch and the microswitch on feed inlet attachment Any generation wake up trigger signal, the vibration information of the wake-up signal is sent to wireless transmitter module or base station, by wireless Transmitting module or base station are sent to radio reception module corresponding with the wake-up circuit.

The measurement control module includes material-level measure wake-up trigger circuit, which is vibration Generate electricity submodule, exists between the material-level measure wake-up trigger circuit and wake-up circuit and is electrically connected, from wake-up trigger circuit Wake up trigger signal effect under, at least part circuit of the wake-up circuit into material-level detecting device sends out wake-up signal.

The method that the present invention provides further includes material management method, specifically comprises the following steps：

The capacitance parameter value of material-level measure capacitor output is handled and obtains following at least one derived information：

The charging times of storage tank；

The feed time of storage tank；

The feeding quantity of storage tank；

At least one derived information is sent to mobile phone monitoring material position by material position state analyzing module by second wireless channel APP, live expects pipe indicator or indoor computer terminal display.

Specifically, the handling of goods and materials module for executing handling of goods and materials operation is located at material-level measure point, is located at from material-level measure The corresponding radio sending module of point receives capacitance parameter value or the base station of material position state parameter, or at far-end computer It manages in device.

Specifically, first wireless channel is low-power consumption bluetooth transmission radio channel or is passed using micro power consumption wireless The radio channel of defeated proprietary protocol；

The second wireless channel is low-power consumption bluetooth transmission radio channel, supports the aerogram of WiFi communication agreement Road, GPRS channels, support forth generation mobile communication protocol radio channel and support the 5th third-generation mobile communication agreement it is wireless At least one of radio channel.

Specifically, described that at least one derived information is sent to mobile phone monitoring material position APP, live expects pipe indicator Or indoor computer terminal display, include the following steps：

Graphically show or indicate material position position；Or

Show that warning material position has arrived early warning position in a manner of the sound.

Embodiment two, a kind of material-level detecting device citing

It is shown in Figure 2, a kind of geographical sign information acquisition device embodiment provided by the invention, including：

The device that the present embodiment provides, wherein

Capacitance parameter acquisition module 200 obtains the capacitance parameter of the corresponding first material-level measure capacitor of the first material-level measure point, And the realization method of the capacitance parameter of the corresponding second material-level measure capacitor of the second material-level measure point of acquisition includes：

It is obtained by wire channel；Or

It is obtained by wirelessly or non-wirelessly channel.

The device that the present embodiment provides, wherein

Exist between capacitance parameter acquisition module 200 and material position processing module 230 and be electrically connected, material position processing module 230 passes through this Electrical connection obtains the capacitance parameter of the corresponding first material-level measure capacitor of the first material-level measure point, and obtains the inspection of the second material position The capacitance parameter of the corresponding second material-level measure capacitor of measuring point, also, material position processing module 230 is to first material-level measure The capacitance parameter of the capacitance parameter of capacitor and the second material-level measure capacitor is handled to obtain material position state.

Capacitance parameter acquisition module 200 obtains the corresponding first material-level measure electricity of the first material-level measure point by wire channel The capacitance parameter of container, and obtain the realization of the capacitance parameter of the corresponding second material-level measure capacitor of the second material-level measure point Mode does not provide diagram in the present embodiment.

Capacitance parameter acquisition module 200 obtains corresponding first material position of the first material-level measure point by wirelessly or non-wirelessly channel The capacitance parameter of sensing capacitor, and obtain the capacitance parameter of the corresponding second material-level measure capacitor of the second material-level measure point Realization method, it is shown in Figure 2；

Specifically, which includes the two radio sending modules 220 and 220a being located on storage tank, a radio reception Module 210, a radio forwarding module 211, a live bin level indicator 212, a material position processing module 230, one Handling of goods and materials module 260, a wireless access point 280, a wake-up trigger module 240, a power control module 250；Its In,

Material-level measure capacitor 223 exists with capacitance parameter conversion module 222 to be electrically connected, capacitance parameter conversion module 222 and electricity Hold parameters measurement module 221 and there is electrical connection, capacitance parameter measurement module 221 exists with radio sending module 220 to be electrically connected； The capacitance that material-level measure capacitor 223 exports is transformed in frequency of oscillation, voltage and current by capacitance parameter conversion module 222 Any parameter, capacitance parameter measurement module 221 measures capacitance parameter conversion module 222 and sends measurement result To radio sending module 220, which is sent to radio reception by radio sending module 220 by wireless channel Module 210；

Material-level measure capacitor 223a exists with capacitance parameter conversion module 222a be electrically connected, capacitance parameter conversion module 222a and There is electrical connection in capacitance parameter measurement module 221a, capacitance parameter measurement module 221a has electricity with radio sending module 220a Connection；The material-level measure capacitor 223a capacitances exported are transformed to frequency of oscillation, voltage by capacitance parameter conversion module 222a Capacitance parameter conversion module 222a is measured and will be surveyed with any one of electric current parameter, capacitance parameter measurement module 221a Amount result is sent to radio sending module 220a, radio sending module 220a and sends the measurement result by wireless channel To radio reception module 210；

Radio reception module 210 by it is received to capacitance parameter measurement module 221/221a to capacitance parameter conversion module It is that 222/222a is measured as a result, being sent to wireless access point 280 by radio forwarding module 211；

Wireless access point 280 is by the capacitance parameter measurement module 221/221a from radio forwarding module 211 to capacitance parameter The result that conversion module 222/222a is measured is sent to material position processing module 230, and material position processing module 230 is processed to tie Fruit is sent to handling of goods and materials module 260, or is processed to result by wireless access point 280 and is sent to radio forwarding module 211, the handling result of material position processing module 230 is sent to live bin level indicator 212 by radio forwarding module 211；

Material position processing module 230 includes material position state determination sub-module 231.

Exist between capacitance parameter acquisition module 200 and material position processing module 230 and is electrically connected.

Exist between capacitance parameter acquisition module 200 and wireless access point 280 and is electrically connected.

The device that the present invention provides, wherein

The first and second material-level measures capacitor is the capacitor under following any laying mode：

First and second material-level measure capacitors are two capacitances in the group capacitor that material-level measure capacitor 223 includes Device, and frequency of oscillation derived from the capacitance of the first and second material-level measure capacitors, or export voltage or derived current lead to It crosses radio sending module 220 and is sent to radio reception module 210；

First and second material-level measure capacitors are two capacitances in the group capacitor that material-level measure capacitor 223a includes Device, and frequency of oscillation derived from the capacitance of the first and second material-level measure capacitors, or export voltage or derived current lead to It crosses radio sending module 220a and is sent to radio reception module 210；And

First material-level measure capacitor is a capacitor in the group capacitor that material-level measure capacitor 223 includes, and Frequency of oscillation derived from the capacitance of first material-level measure capacitor, or export voltage or derived current are sent by radio Module 220 is sent to radio reception module 210；Second material-level measure capacitor is one that material-level measure capacitor 223a includes A capacitor in group capacitor, and frequency of oscillation derived from the capacitance of the second material-level measure capacitor, or export electricity Pressure or derived current are sent to radio reception module 210 by radio sending module 220a.

The device that the present invention provides, wherein

The radio reception module 210 obtains the corresponding first material-level measure capacitor of the first material-level measure point for executing Capacitance parameter, obtain the operation of the capacitance parameter of the corresponding second material-level measure capacitor of the second material-level measure point, it is specific to wrap Include following operating procedure：

Further, there are wired or wireless between the radio reception module 210 and capacitance parameter acquisition module 200 Transmission channel.

The device that the present invention provides, wherein

The material position state determination sub-module 231, including material position slightly sentences submodule and material position carefully sentences at least one of submodule； Specifically,

Specifically, the material position slightly sentences the following operating procedure of submodule execution：

Specifically, the material position carefully sentences the following operating procedure of submodule execution：

Specifically, the capacitance parameter currently exported with the first material-level measure capacitor is matched, including is walked as follows Suddenly：

Preferably, and the ratio is between 1% value 10%.

The device that the present invention provides, wherein

The material position slightly sentences submodule, exists between capacitance parameter acquisition module 200 and is electrically connected；

It is executed in fill process and determines whether material position reaches the operation of the first material-level measure point according to matching result, specifically included Following steps：

Corresponding second material-level measure electricity when being less than when material position is in, being equal to and above the second material-level measure capacitor position At least one of capacitance parameter of container and the matching error for the capacitance parameter that the first material-level measure capacitor currently exports are small When the matching error thresholding of reservation, judgement material position reaches the first material-level measure point position, otherwise, it is determined that material position does not reach first Material-level measure point position；

Or

Determine whether material position reaches the operation of the second material-level measure point according to matching result what discharging executed in the process, it is specific to wrap Include following steps：

Corresponding first material-level measure electricity when being less than when material position is in, being equal to and above the first material-level measure capacitor position At least one of capacitance parameter of container and the matching error for the capacitance parameter that the second material-level measure capacitor currently exports are small When the matching error thresholding of reservation, judgement material position reaches the second material-level measure point position, otherwise, it is determined that material position does not reach second Material-level measure point position.

The device that the present invention provides, wherein

The material position carefully sentences submodule, exists between capacitance parameter acquisition module 200 and is electrically connected；

In fill process, material position is carefully sentenced submodule and is executed according to matching result estimation material position relative to the first material-level measure point The step of specific location, specifically includes following sub-step：

During discharging, material position is carefully sentenced submodule and is executed according to matching result estimation material position relative to the second material-level measure point The step of specific location, specifically includes following sub-step：

△b= |Cl-Cm|,

R=H/△b；

△c=|Cc-Cm|,

D = △c *R;

△b= |Cl-Cm|,

R=H/△b；

△c=|Cc-Cm|,

D = △c *R;

The device that the present invention provides further includes material-level measure wake-up trigger module 240, and the module is for executing following steps：

Using it includes vibrating power-generation submodule 241 generate wake up trigger signal, wake up trigger signal acts on wake-up circuit Trigger signal input terminal, at least part circuit from wake-up circuit to material-level detecting device under wake up trigger signal effect Send out wake-up signal.

Specifically, wake-up trigger module 240 includes vibrating power-generation submodule 241 and wake-up circuit 242；

Wake-up trigger module 240 is for executing following operating procedure：

Using it includes vibrating power-generation submodule 241 generate wake up trigger signal, wake up trigger signal acts on wake-up circuit 242 wake up trigger signal input terminal, wake-up circuit wake up trigger signal effect under into material-level detecting device at least one Partial circuit sends out wake-up signal.

Further, the wake-up circuit 242 includes and wakes up to confirm submodule 243, and the submodule is in wake up trigger signal Effect is lower to enter wake-up acknowledgement state, and wake-up circuit further confirms that wake-up condition in the case where waking up acknowledgement state, only exists After wake-up condition is confirmed, at least part circuit of the wake-up circuit into material-level detecting device sends out wake-up signal.

At least part circuit being mounted on storage tank into material-level detecting device as the wake-up circuit 242 is sent out A kind of specific implementation of wake-up signal, wake-up circuit 242 send power indicator signal or power supply to power control module 250 Trigger signal.

Specifically, at least part electricity of the wake-up circuit under wake up trigger signal effect into material-level detecting device Road sends out wake-up signal, including：

The device that the present invention provides further includes handling of goods and materials module 260, and the module is for executing following operating procedure：

The charging times of storage tank；

The feed time of storage tank；

The feeding quantity of storage tank；

Specifically, described that at least one derived information is sent to mobile phone material-level measure APP, live expects pipe indicator Or indoor computer terminal display, include the following steps：

Graphically show or indicate material position position；Or

Shown in Figure 3 as a kind of application mode that the present embodiment provides, the laying mode of distributed material-level detecting device is such as Under：

On the top of storage tank, two material-level measure capacitors 223 and 223 ', the capacitance of the two material-level measure capacitors are laid Frequency of oscillation value is sent to through the wireless channel 320 between radio sending module 220 and radio reception module 210 derived from value Radio reception module 210；Material-level measure capacitor 223 and 223 ' is respectively 220 corresponding first He of radio sending module Second material-level measure capacitor；

In the lower part of storage tank, two material-level measures capacitor 223a and 223a ', the electricity of the two material-level measure capacitors are laid Frequency of oscillation value derived from capacitance is sent out through the wireless channel 310 between radio sending module 220a and radio reception module 210 Give radio reception module 210；Material-level measure capacitor 223a and 223a ' are respectively radio sending module 220a corresponding First and second material-level measure capacitors；

Frequency of oscillation value derived from the capacitance of received material-level measure capacitor is sent to by radio reception module 210 Radio forwarding module 211, radio forwarding module 211 will be described by its wireless channel 340 between wireless access point 280 Frequency of oscillation value is sent to wireless access point 280, and the received frequency of oscillation value is sent feed by wireless access point 280 Its material position handling result is sent to handling of goods and materials module 260 by position processing module 230, material position processing module 230.

Further, its material position handling result is sent to mobile phone terminal by material position processing module 230 by wireless channel 330 300；Or

It is sent to indoor computer terminal display；Or

Live expects pipe indicator 212 is sent by wireless channel 340；Or

Mobile phone terminal 300 is sent by wireless channel 340 and wireless channel 350.

Wireless channel 350 is the wireless channel between radio forwarding module 211 and mobile phone terminal 300.

Method and device provided in an embodiment of the present invention can use electronic technology, radio transmission techniques in whole or in part It is realized with Internet technology；Method provided in an embodiment of the present invention, can in whole or in part by software instruction and/or Hardware circuit is realized；Electronic component realization may be used in the module or unit that device provided in an embodiment of the present invention includes.

The above, only preferred embodiment of the invention, protection domain not for the purpose of limiting the invention.Appoint Technical staff in what field of the present invention, do not depart from disclosed herein spirit and scope under the premise of, Ke Yi Any modification and variation, but protection scope of the present invention defining with appended claims are carried out in the form and details of implementation Subject to range.

The method and device that the embodiment of the present invention provides, overcome the existing calibration of existing capacitance charge level detection technique it is complicated, Material position identification certainty is low, material position evaluated error is big, can not achieve the advanced treating of sensor information and flexible information is sent At least one of these disadvantages.It is at low cost, there is practicability.

Claims

1. a kind of material level detection method, including：

The capacitance parameter of the corresponding first material-level measure capacitor of the first material-level measure point is obtained, the second material-level measure point pair is obtained The capacitance parameter for the second material-level measure capacitor answered；

The material position state at the first material-level measure point is determined using the capacitance parameter of the first and second material-level measures capacitor； Or

2. the method for claim 1, wherein

3. the method for claim 1, wherein

4. method as claimed in claim 3, wherein

The material position slightly sentences step, including：

5. method as claimed in claim 3, wherein

The material position carefully sentences step, including：

6. method as claimed in claim 5, wherein

Or

7. a kind of material-level detecting device, including：

8. device according to claim 7, wherein

Between the capacitance parameter acquisition module 200 and at least one of capacitance parameter measurement module 221 and 221a there are Line or radio connection, capacitance parameter acquisition module 200 obtain corresponding first material of the first material-level measure point by the electrical connection The capacitance parameter of position sensing capacitor, and obtain the capacitance ginseng of the corresponding second material-level measure capacitor of the second material-level measure point Number.

9. device according to claim 7, wherein

The material position state determination sub-module 231 that the material position processing module 230 includes, further include material position slightly sentence submodule and Material position carefully sentences at least one of submodule.

10. device according to claim 9, wherein

The material position slightly sentences submodule, executes following operating procedure：

11. device according to claim 9, wherein

The material position carefully sentences submodule, exists between capacitance parameter acquisition module 200 and is electrically connected, executes following operating procedure：

12. according to the devices described in claim 11, wherein