CN104614040A - Material detection device and method - Google Patents

Abstract

The invention discloses a material detection device and method. The device comprises a detected weight and a control device. The detected weight is hoisted above a material storage bin through traction of a steel wire rope. The control device is used for controlling the steel wire rope to be wound up and unwound so that the detected weight can move at an even speed in the vertical direction in the storage bin. The method includes the steps that the height h from the top of the storage bin to the material face is obtained by sensing the state change of the detected weight; then, the material stock W in the storage bin is calculated according to the following form: W=Pi/4*D<2> / (H-h, 0) Rho*d*h, wherein Rho=alpha1n(h)+b, wherein the Rho is a logarithm relation between the material density in the storage bin and the height h. According to the method, the weight of the material is measured through a counter weight method, an expensive level gage is omitted, so the cost is greatly lowered; meanwhile, the weight of the material is obtained through integral computation according to the logarithm relation between the material density in the storage bin and the height h , the situation that the density is different while the height of the powdery material is different is taken into account, so the correspondence between the density of the material and the corresponding height can be maintained, and measurement results are calculated accurately.

Description

A kind of material sniffer and method

Technical field

The present invention relates to building powder storage bin material fields of measurement, a kind of particularly material sniffer and method.

Background technology

Tradition material level measuring method is mostly first measured stock's rice number with various level-sensing device and is multiplied by average every meter of weight of material again and obtains.That to be level gaugings be not the shortcoming of these methods is very accurate, and on average every meter of weight of material can not reflect that material average density of many times is large and material is few time the average density little fact.There is comparatively big error in the tank farm stock therefore measured by these methods and actual value.In currently marketed storehouse, charge level detector adopts as supersonic sounding, radar detection, capacitance-resistance detection etc. in addition, and these sniffer costs are all higher.

Summary of the invention

To the object of the invention is to overcome in prior art existing above-mentioned deficiency, provide a kind of cost low, measure material sniffer and method accurately.

In order to realize foregoing invention object, the technical solution used in the present invention is:

A kind of material sniffer, comprising:

Detection weight, it is lifted on above material warehouse by rope traction;

Control device, for controlling folding and unfolding wire rope, described detection weight is at the uniform velocity moved in described warehouse up and down, obtain the height h of Cang Ding to charge level of described warehouse by detecting the change of weight state described in perception, then calculate the material inventory W in described warehouse according to following formula:

$W=\frac{\mathrm{\&pi;}}{4}{D}^2{\&Integral;}_0^{H-h}\mathrm{\&rho;dh};$

In formula: ρ=aln (h)+b, ρ characterize the material density in described warehouse and the logarithmic relationship formula highly between h, and a is coefficient, b is constant, D is described warehouse diameter, and h is the height of Cang Ding to charge level of described warehouse, and H is the overall height of described warehouse.

Preferably, when described material is cement, a=0.1027, b=1.3116, ρ=0.1027ln (h)+1.3116.

Preferably, when described material is flyash, a=0.0936, b=1.1478, ρ=0.0936ln (h)+1.1478.

Preferably, when described material is breeze, a=0.1183, b=1.2595, ρ=0.1183ln (h)+1.2595.

Preferably, described detection weight is weight or hollow ball.

Preferably, described control device comprises:

Gravity perception unit, for detecting the heavy condition change information of weight described in perception;

Processing unit, for after the signal that exports when receiving weight change that described gravity perception unit perceives described detection weight and being the first predetermined value, the Cang Ding calculating described warehouse interval time when the weight change starting to be moved down into described detection weight from the Cang Ding of described warehouse according to described detection weight is the first predetermined value to the height h of charge level, and calculates the material inventory W in described warehouse according to described height h: and

Display unit, is connected with described processing unit, for being shown to the height h of charge level by the Cang Ding of the material inventory W in described warehouse and/or described warehouse.

Preferably, the Cang Ding of described warehouse is provided with pick-up unit, for when detecting that described detection weight outputs a control signal to described control device when dropping to the Cang Ding position of described warehouse; Described control device starts timing and calculates described interval time after receiving described control signal.

The present invention also provides a kind of material detection method, utilizes the material inventory in above-mentioned material detection material warehouse, comprises the steps:

Described control device controls to drive wire rope that described detection weight is at the uniform velocity moved in described warehouse downwards, obtains the step of the Cang Ding to the height h of charge level of described warehouse by detecting the change of weight state described in perception;

Described control device calculates the step of the material inventory W in described warehouse according to following formula:

in formula: ρ=aln (h)+b, ρ characterize the material density in described warehouse and the logarithmic relationship formula highly between h, and a is coefficient, b is constant, D is described warehouse diameter, and h is the height of Cang Ding to charge level of described warehouse, and H is the overall height of described warehouse;

Described control device controls the step stopped when driving wire rope to make described detection weight be moved upwards up to predetermined altitude in described warehouse again.

Preferably, described control device controls to drive wire rope that described detection weight is at the uniform velocity moved in described warehouse downwards, the step of the Cang Ding to the height h of charge level of described warehouse is obtained by detecting the change of weight state described in perception, be specially: described control device controls to drive wire rope that described detection weight is at the uniform velocity moved in described warehouse downwards, detects the heavy condition change information of weight described in perception;

When the weight change perceiving described detection weight is the first predetermined value, the Cang Ding calculating described warehouse interval time when the weight change starting to be moved down into described detection weight from the Cang Ding of described warehouse according to described detection weight is the first predetermined value is to the height h of charge level.

Preferably, the method also comprises: when detecting that described detection weight drops to the Cang Ding position of described warehouse described control device start timing calculate described interval time.

Compared with prior art, beneficial effect of the present invention:

The present invention adopts weight method to measure weight of material, eliminate expensive level-sensing device, cost reduces greatly, simultaneously according to the logarithmic relationship formula integral and calculating weight of material between the material density in warehouse and height, the problem that when considering powder object differing heights, density is different, make its density and its respective heights keep corresponding relation, such computation and measurement result is accurate.Material sniffer of the present invention and method measuring accuracy significantly improve, and alleviate the labour intensity of manual measurement simultaneously.The present invention has special important meaning to Instructing manufacture technique and economic decision-making.

Accompanying drawing explanation

Fig. 1 is the material sniffer schematic diagram in the embodiment of the present invention 1;

Fig. 2 is the control device schematic diagram in the embodiment of the present invention 1;

Fig. 3 is cement height-densogram;

Fig. 4 is flyash height-densogram;

Fig. 5 is breeze height-densogram.

Embodiment

Below in conjunction with embodiment, the present invention is described in further detail.But this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following embodiment, all technology realized based on content of the present invention all belong to scope of the present invention.

The present invention adopts weight method to measure weight of material, cost reduces greatly, simultaneously according to the logarithmic relationship formula integral and calculating weight of material between the material density in warehouse and height, the problem that when considering powder object differing heights, density is different, make its density and its respective heights keep corresponding relation, computation and measurement result is more accurate.Illustrate below in conjunction with accompanying drawing.

Figure 1 shows that the material sniffer schematic diagram of the embodiment of the present invention 1, comprise detection weight 1 and control device 2, described detection weight 1 its be lifted on above material warehouse 3 by wire rope 6 traction.Described detection weight 1 is weight or hollow ball, illustrates in the present embodiment for hollow ball, can certainly be other weights.Described control device 2 makes described detection weight 1 at the uniform velocity move up and down in described warehouse 3 for controlling folding and unfolding wire rope 6, obtain the height h of Cang Ding to charge level of described warehouse 3 by detecting the change of weight 1 state described in perception, then calculate the material inventory W in described warehouse 1 according to following formula:

$W=\frac{\mathrm{\&pi;}}{4}{D}^2{\&Integral;}_0^{H-h}\mathrm{\&rho;dh};$

In formula: ρ=aln (h)+b, ρ characterizes the material density in described warehouse and the logarithmic relationship formula highly between h, a is coefficient, b is constant, D is described warehouse diameter, h is the height of Cang Ding to charge level of described warehouse, and H is the overall height of described warehouse, and H-h is stock's powder layer height.Wherein this logarithmic relationship formula can be recorded by test.The present invention is according to the logarithmic relationship formula integral and calculating weight of material between the material density in warehouse and height, and the problem that when considering powder object differing heights, density is different, make its density and its respective heights keep corresponding relation, computation and measurement result is more accurate.

Concrete, referring to Fig. 2, described control device 2 comprises gravity perception unit 201, processing unit 202 and display unit 203.Described gravity perception unit 201 is for detecting the heavy condition change information of weight 1 described in perception.Described processing unit 202 (as microprocessor, microcontroller etc.) is for after the signal that exports when the weight change of detection weight 1 is the first predetermined value as described in perceiving when gravity perception unit 201 as described in receiving, the height h of Cang Ding to charge level calculating described warehouse 3 interval time when the weight change starting to be moved down into described detection weight 1 from the Cang Ding of described warehouse 3 according to described detection weight 1 is the first predetermined value, and calculate the material inventory W in described warehouse 3 according to described height h.Described display unit 203 (as LCD or light-emitting diode display) with as described in processing unit 202 be connected, for being shown to the height h of charge level by the Cang Ding of the material inventory W in described warehouse 3 and/or described warehouse 3, facilitate real time inspection.

Further illustrate below, in the present embodiment on material warehouse top above warehouse 3 edge (i.e. top) about three/Radius distance hang a fixed pulley 4 and be fixed in storehouse and push up on rainproof cover plate, warehouse 3 top edge separately hangs a fixed pulley 5, with φ 8mm steel wire penetrating two pulleys, wire rope 6 one end in warehouse hangs a hollow ball and (nearly weighs 2.5Kg, diameter is about 250mm), the other end connects described control device 2.Hollow ball is suspended on material warehouse uppermost limit at ordinary times.When carrying out the measurement of material warehouse compartment, hollow ball is adjusted to warehouse 3 tip position, start control device 2 to control hollow ball is at the uniform velocity moved downwards at a slow speed, when not detecting material, control device 2 calculates and the weight W reading shown can think unchanged (actual conditions because of wire rope have weight readings to be slightly slowly increase), when detecting material, control device 2 weight readings is reduced to suddenly a numerical value (i.e. described first predetermined value, usually close to zero), the length value that now wire rope 6 stretches out from control device 2 to be in storehouse null value on material, the i.e. Cang Ding to the height h of charge level of described warehouse 3, it can be multiplied by velocity amplitude (i.e. uniform velocity's value of hollow ball decline) according to described time interval T and obtain.Deduct upper null value h by feed bin overall height H again and be supplies on hand height value, then just can further calculate.Wherein control device 2 control wire rope 6 uniform descent can be realized by known technology (as adopt motor realize), no longer describe in detail herein.

In a preferred version, the Cang Ding of described warehouse 3 is provided with pick-up unit (as infrared sensor, figure does not show), for when detecting that described detection weight 1 outputs a control signal to described control device 2 when dropping to the Cang Ding position of described warehouse 3; Start timing after described control device 2 receives described control signal and calculate described interval time.Because hollow ball during work is not necessarily all lucky in warehouse Cang Ding position, one position, top may be positioned at, the also timing that now declines calculates interval time thus calculates h value and do not conform to the actual conditions, cause final material weight W test result inaccurate, just can Measurement accuracy be realized after this pick-up unit is set, simple and convenient.

The measurement of density during powder object differing heights adopts the test method for impression of resurveying.Replace by heavy counterweights such as upper materials use, measure depth of cup and can calculate lower floor's material density.The material depth utilizing the method to measure and density meet logarithmic relationship, set up material density-height relationships curve thus, measure null value h on powder material storehouse, then stock's powder layer height (H-h) is calculated according to feed bin overall height H, go out powder stock material value W according to density calculation during powder differing heights, thus accurately calculate powder material tank farm stock.The present invention is applicable to various powder body material tank farm stock and calculates.

Wherein characterize material density in described warehouse and logarithmic relationship formula ρ=aln (the h)+b between height h to be recorded by test and determine coefficient a, constant b.For different materials, although density all meets logarithmic relationship with storage height, concrete parameter a, b are different.When described material is cement, a=0.1027, b=1.3116, ρ=0.1027ln (h)+1.3116.When described material is flyash, a=0.0936, b=1.1478, ρ=0.0936ln (h)+1.1478.When described material is breeze, a=0.1183, b=1.2595, ρ=0.1183ln (h)+1.2595.These all obtain by experimental data, are specially: test determination powder is density when differing heights.Test device therefor and material: 10L capacity bucket, specification: diameter 232mm, degree of depth 237mm.Hard smooth plastic plate, diameter 231mm, thickness 9mm.Different size counterweight is some.

Test adopts the method for impression of resurveying.Replace by heavy counterweights such as upper materials use, measure depth of cup and can calculate lower floor's material density.

Process of the test is as follows:

Test layering is decided to be h=237mm/ layer, according to the depth-set of capacity bucket.

First measure the weight W of material in 10L capacity bucket ₀(Kg) first density p, is obtained _h=W ₀÷ 10 (t/m ³);

The counterweight of constant weight is evenly pressed on hard plastic board, makes plastic plate and counterweight general assembly (TW) be W ₀, measure depth of cup Δ h ₁, go out second layer material density by formulae discovery: ρ _2h=h ÷ (h-Δ h ₁) × ρ _h, calculate second layer weight of material W simultaneously ₁=ρ _2h× 10;

Counterweight and plastic plate general assembly (TW) are adjusted to W ₀+ W ₁, continue to measure depth of cup and obtain Δ h ₂, go out third layer material density by formulae discovery: ρ _3h=h ÷ (h-Δ h ₂) × ρ _h, calculate third layer weight of material W simultaneously ₂=ρ _3h× 10;

Counterweight and plastic plate general assembly (TW) are adjusted to W ₀+ W ₁+ W ₂, continue to measure depth of cup and obtain Δ h ₃, go out the 4th layer of material density: ρ by formulae discovery _4h=h ÷ (h-Δ h ₃) × ρ _h, calculate the 4th layer of weight of material W simultaneously ₃=ρ _4h× 10; The like proceed until stock's degree of depth of needing.

Be that after the flyash test of the cement to JD company, the breeze of HF company, XH company, test findings and interpretation of result are as shown in table 1 to table 6 below.

Table 1: cement density testing record sheet

Name of material: cement specification: PO42.5 producer: JD date of test: 2013.9.13

Table 2: flyash density test record sheet

Name of material: flyash specification: F class II grade of producer: XH date of test: 2013.9.13

Table 3: breeze density test record sheet

Name of material: breeze specification: S95 producer: HF date of test: 2013.9.13

Table 4: cement measured value and calculated value error analysis table

Degree of depth h	Actual density	Bulk density	Error %
				0.1185	1.102	1.0926	-0.9
0.3555	1.194	1.2054	1.0
				0.5925	1.250	1.2578	0.6
0.8295	1.288	1.2924	0.4
				1.0665	1.311	1.3182	0.5
1.3035	1.346	1.3388	-0.6
				1.5405	1.365	1.3560	-0.6
1.7775	1.380	1.3707	-0.7
				2.0145	1.391	1.3835	-0.5
2.2515	1.399	1.3950	-0.3
				2.4885	1.406	1.4052	0.0
2.7255	1.409	1.4146	0.4
				2.9625	1.413	1.4231	0.8

Table 5: flyash measured value and calculated value error analysis table

The degree of depth	Actual density	Bulk density	Error %
				0.1185	0.950	0.9482	-0.2
0.3555	1.039	1.0510	1.2
				0.5925	1.102	1.0988	-0.3
0.8295	1.132	1.1303	-0.1
				1.0665	1.161	1.1538	-0.6
1.3035	1.174	1.1726	-0.2
				1.5405	1.191	1.1882	-0.2
1.7775	1.206	1.2016	-0.4
				2.0145	1.214	1.2134	-0.1
2.2515	1.225	1.2238	-0.1
				2.4885	1.232	1.2331	0.1

2.7255	1.240	1.2416	0.1
				2.9625	1.245	1.2495	0.3
3.1995	1.251	1.2567	0.5

Table 6: breeze measured value and calculated value error analysis table

Degree of depth h	Actual density	Bulk density	Error %
				0.1185	1.024	1.0072	-1.6
0.3555	1.129	1.1372	0.7
				0.5925	1.197	1.1976	0.0
0.8295	1.215	1.2374	1.8
				1.0665	1.252	1.2671	1.2
1.3035	1.281	1.2909	0.7
				1.5405	1.319	1.3106	-0.6
1.7775	1.329	1.3275	-0.1
				2.0145	1.353	1.3424	-0.8
2.2515	1.370	1.3555	-1.0
				2.4885	1.374	1.3674	-0.5
2.7255	1.380	1.3781	-0.1
				2.9625	1.384	1.3880	0.3

Can be found out by various testing of materials record and error analysis table, degree of depth h and density meet logarithmic relationship, and this is consistent with theory.Referring to Fig. 3-5, obtain the density-height relationships curve of these three kinds of materials thus:

JD cement: ρ _cement=0.1027ln (h)+1.3116;

XH flyash: ρ _flyash=0.0936ln (h)+1.1478;

HF breeze: ρ _breeze=0.1183ln (h)+1.2595

Can carry out the calculation of supplies on hand gauge thus, in feed bin, material inventory can be calculated as follows:

$W=\frac{\mathrm{\&pi;}}{4}{D}^2{\&Integral;}_0^{H-h}\mathrm{\&rho;dh}$

In formula: D-warehouse diameter; Null value on h-material; ρ-material density and altitude curve equation.

JD cement is had: $W=\frac{\mathrm{\&pi;}}{4}{D}^2{\&Integral;}_0^{H-h}\mathrm{\&rho;dh}$

$\begin{array}{c}=\frac{\mathrm{\&pi;}}{4}\&times;{5.5}^2\&times;{\&Integral;}_0^{10-h}\mathrm{\&rho;dh}\\ =23.758\&times;[12.089-1.2089h+0.1027h\ln \left(h\right)];\end{array}$

XH flyash is had: $W=\frac{\mathrm{\&pi;}}{4}{D}^2{\&Integral;}_0^{H-h}\mathrm{\&rho;dh}$

$\begin{array}{c}=\frac{\mathrm{\&pi;}}{4}\&times;{5.0}^2\&times;{\&Integral;}_0^{8-h}\mathrm{\&rho;dh}\end{array}$

$=19.635\&times;[10.542-1.0542h+0.0936h\ln \left(h\right)];$

HF breeze is had: $W=\frac{\mathrm{\&pi;}}{4}{D}^2{\&Integral;}_0^{H-h}\mathrm{\&rho;dh}$

$\begin{array}{c}=\frac{\mathrm{\&pi;}}{4}\&times;{5.0}^2\&times;{\&Integral;}_0^{8-h}\mathrm{\&rho;dh}\\ =19.635\&times;[11.412-1.1412h+0.1183h\ln \left(h\right)]\end{array}$

When measuring different materials value of inventory, first can go out the value of inventory of different material when different overhead height h according to above formulae discovery, be made into chart, as long as table look-up according to null value on material during use.

The present invention adopts weight method to measure weight of material, cost reduces greatly, simultaneously according to the logarithmic relationship formula integral and calculating weight of material between the material density in warehouse and height, the problem that when considering powder object differing heights, density is different, make its density and its respective heights keep corresponding relation, computation and measurement result is more accurate.The present invention all can effectively be applied in a lot of field.Such as can measure in powder material stock at most building materials enterprise such as concrete mixing plant, cement mill, mineral powder plant and use, this material sniffer also can the unclassified stores beyond powder material use.

The embodiment of the present invention 2 also provides a kind of material detection method, its utilize embodiment illustrated in fig. 1 in material detection material warehouse in material inventory, specifically comprise the steps:

Described control device 2 controls to drive wire rope 6 that described detection weight 1 is at the uniform velocity moved in described warehouse 3 downwards, obtains the step of the Cang Ding to the height h of charge level of described warehouse 3 by detecting the change of weight 1 state described in perception;

Described control device 2 calculates the step of the material inventory W in described warehouse 3 according to following formula:

in formula: ρ=aln (h)+b, ρ characterize the material density in described warehouse and the logarithmic relationship formula highly between h, and a is coefficient, b is constant, D is described warehouse diameter, and h is the height of Cang Ding to charge level of described warehouse, and H is the overall height of described warehouse; And

Described control device 2 controls the step stopped when driving wire rope 6 to make described detection weight 1 be moved upwards up to predetermined altitude in described warehouse 3 again.

The present invention adopts weight method to measure weight of material, cost reduces greatly, simultaneously according to the logarithmic relationship formula integral and calculating weight of material between the material density in warehouse and height, the problem that when considering powder object differing heights, density is different, make its density and its respective heights keep corresponding relation, computation and measurement result is more accurate.

Preferably, described control device 2 controls to drive wire rope 6 that described detection weight 1 is at the uniform velocity moved in described warehouse 3 downwards, obtaining the Cang Ding of described warehouse 3 to the step of the height h of charge level, being specially by detecting the change of weight 1 state described in perception:

Described control device 2 controls to drive wire rope 5 that described detection weight 1 is at the uniform velocity moved in described warehouse downwards, detects the heavy condition change information of weight 1 described in perception;

When the weight change perceiving described detection weight 1 is the first predetermined value, the height h of Cang Ding to charge level calculating described warehouse 3 interval time when the weight change starting to be moved down into from the Cang Ding position of described warehouse 3 described detection weight 1 according to described detection weight 1 is the first predetermined value.

Concrete, described control device 2 comprises gravity perception unit 201, processing unit 202 and display unit 203.Described gravity perception unit 201 is for detecting the heavy condition change information of weight 1 (as hollow ball) described in perception.Described processing unit 202 (as microprocessor, microcontroller etc.) is for after the signal that exports when the weight change of detection weight 1 is the first predetermined value as described in perceiving when gravity perception unit 201 as described in receiving, the Cang Ding calculating described warehouse interval time when the weight change starting to be moved down into described detection weight from the Cang Ding of described warehouse 3 according to described detection weight 1 is the first predetermined value to the height h of charge level, and calculates the material inventory W in described warehouse according to described height h.Described display unit 203 is connected with described processing unit 202, for being shown to the height h of charge level by the Cang Ding of the material inventory W in described warehouse 3 and/or described warehouse, facilitates real time inspection.In the present embodiment on material warehouse top above warehouse edge (i.e. top) about three/Radius distance hang a fixed pulley and be fixed in storehouse and push up on rainproof cover plate, warehouse top edge separately hangs a fixed pulley, with φ 8mm steel wire penetrating two pulleys, wire rope one end in warehouse hangs a hollow ball and (nearly weighs 2.5Kg, diameter is about 250mm), the other end connects described control device.Hollow ball is suspended on material warehouse uppermost limit at ordinary times.When carrying out the measurement of material warehouse compartment, hollow ball is adjusted to warehouse tip position, start control device to control hollow ball is at the uniform velocity moved downwards at a slow speed, when not detecting material, control device calculates and the weight W reading shown can think unchanged (actual conditions because of wire rope have weight readings to be slightly slowly increase), when detecting material, control device weight readings is reduced to suddenly a numerical value (i.e. described first predetermined value, usually close to zero), the length value that now wire rope stretches out from control device to be in storehouse null value on material, the i.e. Cang Ding to the height h of charge level of described warehouse, it can be multiplied by velocity amplitude (i.e. uniform velocity's value of hollow ball decline) according to described time interval T and obtain.Deduct upper null value h by feed bin overall height H again and be supplies on hand height value, then just can further calculate.Wherein control device control wire rope uniform descent can be realized by known technology (realizing as adopted motor), no longer describes in detail herein.

Preferably, the method also comprises: when detecting that described detection weight drops to the Cang Ding position of described warehouse described control device start timing calculate described interval time, as by infrared sensor detect output signal make as described in control device start timing.Because hollow ball during work is not necessarily all lucky in warehouse Cang Ding position, one position, top may be positioned at, the also timing that now declines calculates interval time thus calculates h value and do not conform to the actual conditions, cause final material weight W test result inaccurate, adopt the program just can realize Measurement accuracy, simple and convenient.The method step embodiment of the present embodiment 2 adopts the material sniffer in embodiment 1 to detect, and particular content can associated description in reference example 1, no longer describes in detail herein.

The present invention adopts weight method to measure weight of material, cost reduces greatly, simultaneously according to the logarithmic relationship formula integral and calculating weight of material between the material density in warehouse and height, the problem that when considering powder object differing heights, density is different, make its density and its respective heights keep corresponding relation, computation and measurement result is more accurate.The present invention all can effectively be applied in a lot of field.Such as can measure in powder material stock at most building materials enterprise such as concrete mixing plant, cement mill, mineral powder plant and use, this material sniffer also can the unclassified stores beyond powder material use.

By reference to the accompanying drawings the specific embodiment of the present invention is described in detail above, but the present invention is not restricted to above-mentioned embodiment, in the spirit and scope situation of claim not departing from the application, those skilled in the art can make various amendment or remodeling.

Claims (10)

1. a material sniffer, is characterized in that, comprising:

Detection weight, it is lifted on above material warehouse by rope traction;

Control device, for controlling folding and unfolding wire rope, described detection weight is at the uniform velocity moved in described warehouse up and down, obtain the height h of Cang Ding to charge level of described warehouse by detecting the change of weight state described in perception, then calculate the material inventory W in described warehouse according to following formula:

$W=\frac{\mathrm{\&pi;}}{4}{D}^2{\&Integral;}_0^{H-h}\mathrm{\&rho;dh};$

In formula: ρ=aln (h)+b, ρ characterize the material density in described warehouse and the logarithmic relationship formula highly between h, and a is coefficient, b is constant, D is described warehouse diameter, and h is the height of Cang Ding to charge level of described warehouse, and H is the overall height of described warehouse.

2. material sniffer according to claim 1, is characterized in that, when described material is cement, and a=0.1027, b=1.3116, ρ=0.1027ln (h)+1.3116.

3. material sniffer according to claim 1, is characterized in that, when described material is flyash, and a=0.0936, b=1.1478, ρ=0.0936ln (h)+1.1478.

4. material sniffer according to claim 1, is characterized in that, when described material is breeze, and a=0.1183, b=1.2595, ρ=0.1183ln (h)+1.2595.

5. material sniffer according to claim 1, is characterized in that, described detection weight is weight or hollow ball.

6. the material sniffer according to any one of claim 1-5, is characterized in that, described control device comprises:

Gravity perception unit, for detecting the heavy condition change information of weight described in perception;

Processing unit, for after the signal that exports when receiving weight change that described gravity perception unit perceives described detection weight and being the first predetermined value, the Cang Ding calculating described warehouse interval time when the weight change starting to be moved down into described detection weight from the Cang Ding of described warehouse according to described detection weight is the first predetermined value to the height h of charge level, and calculates the material inventory W in described warehouse according to described height h: and

Display unit, is connected with described processing unit, for being shown to the height h of charge level by the Cang Ding of the material inventory W in described warehouse and/or described warehouse.

7. material sniffer according to claim 6, is characterized in that, the Cang Ding of described warehouse is provided with pick-up unit, for when detecting that described detection weight outputs a control signal to described control device when dropping to the Cang Ding position of described warehouse; Described control device starts timing and calculates described interval time after receiving described control signal.

8. a material detection method, is characterized in that, utilizes the material inventory in the material detection material warehouse described in any one of claim 1-5, comprises the steps:

Described control device controls to drive wire rope that described detection weight is at the uniform velocity moved in described warehouse downwards, obtains the step of the Cang Ding to the height h of charge level of described warehouse by detecting the change of weight state described in perception;

Described control device calculates the step of the material inventory W in described warehouse according to following formula:

in formula: ρ=aln (h)+b, ρ characterize the material density in described warehouse and the logarithmic relationship formula highly between h, and a is coefficient, b is constant, D is described warehouse diameter, and h is the height of Cang Ding to charge level of described warehouse, and H is the overall height of described warehouse;

Described control device controls the step stopped when driving wire rope to make described detection weight be moved upwards up to predetermined altitude in described warehouse again.

9. material detection method according to claim 8, it is characterized in that, described control device controls to drive wire rope that described detection weight is at the uniform velocity moved in described warehouse downwards, obtaining the Cang Ding of described warehouse to the step of the height h of charge level by detecting the change of weight state described in perception, being specially:

Described control device controls to drive wire rope that described detection weight is at the uniform velocity moved in described warehouse downwards, detects the heavy condition change information of weight described in perception;

When the weight change perceiving described detection weight is the first predetermined value, the Cang Ding calculating described warehouse interval time when the weight change starting to be moved down into described detection weight from the Cang Ding of described warehouse according to described detection weight is the first predetermined value is to the height h of charge level.

10. material detection method according to claim 9, is characterized in that, also comprise: when detecting that described detection weight drops to the Cang Ding position of described warehouse described control device start timing calculate described interval time.