AU2006241318A1 - A balance - Google Patents
A balance Download PDFInfo
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- AU2006241318A1 AU2006241318A1 AU2006241318A AU2006241318A AU2006241318A1 AU 2006241318 A1 AU2006241318 A1 AU 2006241318A1 AU 2006241318 A AU2006241318 A AU 2006241318A AU 2006241318 A AU2006241318 A AU 2006241318A AU 2006241318 A1 AU2006241318 A1 AU 2006241318A1
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- Australia
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- slurry
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- solids
- electronic computing
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Description
AUSTRALIA
Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT Applicants: ADAM JOHN BRADLEY MICHAEL KITNEY Invention Title: A BALANCE The following statement is a full description of this invention, including the best method of performing it known to us: 2- A BALANCE The present invention relates to an apparatus and a method for use by mineral plant operators to determine a range of properties of mineral solids and slurries.
Most mineral processing plants include mineral processing operations on slurry streams of water and solids transported through circuits via pumps and pipelines. It is important for plant operators to measure the properties of slurries at different stages of a plant operation in order to monitor the performance of the circuits in the plant.
It is by calculating: known to monitor the performance of a plant slurry density, ie the weight of per unit volume; (ii) specific gravity of a slurry, ie of the density of the slurry and density of water; the slurry the ratio the (iii) slurry percent solids, ie weight of solids in a slurry per unit weight of slurry or per unit volume of slurry; and (iv) grams solid per litre of slurry sample.
A widely used option for calculating these properties is a spring balance which includes a central spring, a measuring bucket that can be suspended from the H:Angel aheep\GRM SpCR60675-99.doc 22/11/06 IND- 3- O spring, a pointer that is deflected proportionally to the weight of a sample in the bucket, and a display mechanism 0 for providing a reading of the specific gravity or other C properties of the sample based on the position of the c 5 pointer in relation to the display mechanism.
0 One limitation of spring balances with slurries Sis that the operation of the balances is based on the assumption that the specific gravity of the process solution is always 1.0. This characteristic limits the use of spring balances to simple water-solids systems.
A further limitation is that spring balances are mechanical devices containing a number of unprotected moving parts and are susceptible to corrosion by and clogging with process materials with consequent loss of accuracy and functionality. The operation of spring balances relies on the sustained performance of the spring and a drive gear for the pointer. Distortion of the spring can be corrected by a coarse adjusting screw, but again the serviceability of this simple calibration device is susceptible to the harsh operating conditions that are typically found in the mineral processing environment.
Spring balances are often ultimately discarded as service and repair is difficult.
A further limitation is that spring balances are bulky in that a machine of a useful size is both heavy and awkward to carry and position for satisfactory use.
A further limitation is that spring balances are prone to structural vibration which makes interpretation of the displayed results difficult. This is a particularly significant operational limitation because the most common points of use in a mineral processing circuit are adjacent to mills, pumps and screens where structural vibration is commonplace.
H \ageIa~ft p\GRM SpeciA6067S.99doc 2211/06 4- A further limitation is that the display 0 z mechanism of spring balances consists of interchangeable C paper face sheets which allow operators to determine the Cl 5 solids concentration of a sample over a range of selected particle densities and a number of different face sheets 00 are required to span the range of typical mineral M densities. Changing the range of the readout is accomplished by changing the paper dial on balances. This I 10 operation exposes the pointer to damage, thus compromising the accuracy of the balances.
A further limitation is that accuracy of spring balances is low. The balances are an analogue device which is characterised by the following requirements for ideal operation: clean conditions; (ii) absence of external vibration; (iii) invariant solution density of 1.0; and (iv) good lighting.
In addition, the quality of the output of spring balances is compromised by the following: coarse calibration function; (ii) non-continuous solids specific gravity scales; and (iii) non-linear output scales which are partially obscured by the width of the pointer.
H.\angelahkeep\GRM Speci)60675.99.doc 22111/06 IND- \O 5 c An object of the present invention is to provide an apparatus for calculating one or more of density, z specific gravity, grams solid per litre of slurry, and C slurry percent solids of a slurry which is not subject to the limitations of spring balances described above.
0_ According to the present invention there is Sprovided an apparatus for calculating the density and/or the specific gravity of a sample of a slurry which includes I 10 solids in a liquid, which apparatus includes: c an electric means for measuring the weight of a known volume of the slurry; and (ii) an electronic computing means for calculating the slurry density and/or the specific gravity of the slurry from the measured weight of the slurry and the known volume of the slurry sample.
It is preferred that the electric measuring means be a load cell or a strain gauge.
It is preferred that the electronic computing means includes a means for confirming a stored value of the known volume of the slurry or for inputting another value of the volume.
It is preferred that the apparatus also be capable of calculating the percent solids of the slurry and/or the grams solid per litre of the slurry.
It is preferred particularly that the electronic computing means includes a means for confirming a stored value of the density of the liquid component of the slurry or for inputting another value of the liquid density for use in calculating the percent solids of the slurry and/or HA'ngelatkeep\GRM Speci\60675-99.doc 22/11/06 6the grams solid per litre of the slurry.
0 z It is preferred more particularly that the value C of the liquid density be calculated from the weight of a CI 5 known volume of the liquid measured by the electric measuring means.
00 M It is preferred that the electronic computing means includes a means for confirming a stored value of the I 10 specific gravity or the density of the solids component of the slurry or for inputting another value of the solids C density for use in calculating the percent solids of the slurry and/or the grams solid per litre of the slurry.
It is preferred that the electronic computing means includes a means for confirming a stored value of the weight of a container for holding the slurry to be tested or for inputting another value of the container weight so that the value of the container weight can be taken into account in calculations of the slurry density and other parameters by the electronic computer means.
It is preferred particularly that the value of the container weight be a value measured by the electric measuring means.
According to the present invention there is provided an apparatus for calculating any one or more of the parameters of the density of a slurry, the specific gravity of the slurry, the percent solids of the slurry, and the gram solid per litre of the slurry, which slurry includes solids in a liquid, which apparatus includes: an electric means for measuring the weight of a volume of the slurry; and (ii) an electronic computing means for Hangelahkeep\GRM Speci\60675-99 doc 22/11/06 IND- 7- O calculating one or more of the parameters from the measured weight and data on the 0 properties of the slurry, the solids, and C the liquid required for the calculation C 5 that has already been inputted into and stored in the electronic computer means.
00 M The inputted and stored data includes the volume of the slurry, the density of the solids, and the density N 10 of the liquid.
c According to the present invention there is also provided a method of calculating the density and/or the specific gravity of a slurry which includes solids in a liquid, which method includes the steps of: confirming a value of a volume of a slurry sample to be tested, which value is stored in an electronic computing means, or inputting another value of the slurry volume into the electronic computing means; (ii) measuring the weight of the slurry sample using an electric measuring means; and (iii) calculating the slurry density and/or the specific gravity of the slurry using the electronic computing means and the confirmed or inputted value of the slurry volume and the measured value of the weight of the slurry sample.
It is preferred that the method also includes the option of calculating the percent solids of the slurry and/or the grams solid per litre of the slurry.
In order to make calculations of the slurry H:\jngcla~kccp\GRM Spec"675-99.doc 22A111/06 N- 8-
\O
O percent solids and/or grams solid per litre of the slurry c-I it is preferred that the method includes: 0 z C confirming a value of the density of the C 5 liquid component of the slurry, which value is stored in the electronic computing 00 means, or inputting another value of the Sliquid density into the electronic computing means; and (ii) confirming a value of the density of the C solids component of the slurry, which value is stored in the electronic computing means, or inputting another value of the solids density into the electronic computing means.
The present invention is described further by way of example with reference to the accompanying drawing which is a flow chart illustrating the basic unit operation of a preferred embodiment of a balance in accordance with the present invention.
The preferred embodiment of the balance of the present invention includes a load cell/strain gauge, a programmed microchip that can perform a series of calculations on data generated by the load cell/strain gauge and on data inputted by an operator, a keypad for inputting data and initiating functions, and a display.
The keypad includes keys numbered 0-9 for data entry and the following marked keys.
ZERO
Initiates the Zero function. This function zeros the load cell output for the container that holds a sample H:a.gdakeep\GRM Sp"6M0675-99doc 22/I 1/06 O 9- O of slurry to be tested. When selected, the current Zero value is displayed and the operator may choose to 0 z accept the current value by selecting the ENTER key or C to perform the Zero Set function by selecting the ZERO key.
0_ The Zero Set parameter is retained in non-volatile memory and may be modified by selecting the ZERO key.
CAL
Initiates the Calibrate function. This function allows the entry or calculation of the density of the liquid component of the slurry samples to be tested in subsequent operations.
The Calibrate (Liquid Density) parameter is retained in non-volatile memory and may be modified by selecting the CAL key.
When selected, the calibrate screen displays the current setting, the operator may choose to accept the current value by selecting the ENTER key or enter a new value by keying in the new value on the numerical keypad, followed by selecting the ENTER key. If the liquid density is unknown, the liquid density can be calculated by selecting the CAL key. The new calibrate value is displayed and accepted by selecting the ENTER key.
CALC
When selected, this key calculates the following properties of the slurry being tested and displays the results of the calculations: Slurry Density in grams per litre (gpl) H AngelaN eep\GRM Speci60675-99.doc 22I 1/06 O S- Slurry percent solids (by weight) Slurry percent solids (by volume)
O
z Grams solid per litre of slurry(gpl) c- 5 SUB 0 Provides access to the Sub-Routine menu. The Sub- M Routine menu enables the operator to select and execute one of the following sub-routines: SO Passing Screen Size I Solid Specific Gravity (SG) Variable Volume Mode Sub-Routine 1 The passing Screen Size sub-routine calculates the Mass passing a particular screen size, based on three weighed samples plus the Zero step). The sequence of events for the subroutine is as follows: Zero Step (Zero load-cell) Calibrate (Liquor Density) Sample_1 (Initial Slurry Density) Sample_2 (Screened Slurry Density) Both events 1 2 use the standard ZERO and CALIBRATE function screens. The current values stored in nonvolatile memory can be used or the operator can recalculate both values.
The operator is prompted for Sample 1 and Sample_2.
Pressing the ENTER key after the sample 1 has been placed on the load-cell will initiate the entry of sample_1, followed by a prompt for Sample 2.
HA&.geake-p\GRM SpccMA6lS.99Am 2211/06 11 Pressing the ENTER key after sample_2 has been placed
O
z on the load-cell will initiate the entry of sample_2.
CI 5 After the entry of sample 2, the sub-routine result will be calculate and displayed as: 00 M SUB-ROUTINE 1 SLRY 1 DENSITY xxx I0 SLRY 2 DENSITY xxx PASS SCREEN xxx An error message is produced if the acquired weights/densities do not meet the following limits: Valid Samples Sample_1 Sample_2 Calibrate Sub-Routine 2 The Solids Specific Gravity sub-routine calculates the specific gravity of the solid material in a sample of dry solids, based on three weighed samples plus the Zero step). The sequence of events for the subroutine is as follows: Zero Step (Zero Load-cell) Calibrate (Liquor Density) Sample_l (Dry Solids Weight) Sample 2 (Slurry Density) Both events 1 2 use the standard ZERO and CALIBRATE function screens. The current values stored in nonvolatile memory can be used or the operator can recalculate both values.
The operator is prompted for Sample_1 and Sample_2.
H:angellkeep\GRM Spci\60675-99.doc 22/11/06 \O 12- Pressing the ENTER key after the sample has been placed on the load-cell will initiate the entry of sample_1,
O
z followed by a prompt for Sample_2.
C 5 Pressing the ENTER key after sample_2 has been placed on the load-cell will initiate the entry of sample 2.
00 M After the entry of sample 2, the sub-routine result will be calculated and displayed as: NO SUB-ROUTINE 2 C SOLIDS WEIGHT xxx SLURRY DENSITY xxx SOLIDS SG xxx An error message is produced if the calculated Solids Specific Gravity does not fall within the following limits: Valid Result 0.700 SOLIDS SPECIFIC GRAVITY 6.000 Sub-Routine 3 The Variable Volume sub-routine allows the operator to perform the CALC function calculations on a sample volume different to the Volume Set as programmed in the SETUP function. The sequence of events for this subroutine is as follows: 1. Sample Volume 2. Sample_l (Sample Weight) The operator places the sample on the load cell and is prompted to enter the sample volume When prompted, a default volume (as entered in the SETUP menu) is displayed and the operator may choose to HAa\igela1kecp\GPM Spe\60675-99 do 2211/06 N 13accept the default volume by selecting the ENTER key or or enter a new value by keying in the new value on the
O
z numerical keypad, followed by selecting the ENTER key.
C 5 Pressing the ENTER key after samplel has been placed on the load-cell will initiate the entry of sample_1.
00 c After entry of Sample 1, the sub-routine will calculate the following properties of the slurry being tested and \D 10 display the results of the calculations as: c Slurry Density in grams per litre (gpl) Slurry percent solids (by weight) Slurry percent solids (by volume) Grams solid per litre of slurry(gpl)
SETUP
Provides access to retained SETUP screens. The setup screens provide the operator with a means of entering the following parameters: Volume Set; (ii) Solids Density; and (iii)Auto Timer Off.
The Volume Set parameter defines the volume in ml of the container that holds the slurry being tested for use in subsequent calculations.
The Volume Set parameter is retained in non-volatile memory and may be modified by selecting the SETUP key.
When selected, the Volume Set screen displays the HAangeInaNMep\GRM SpmcA6067.99d 22/11/06 IND- 14- O current setting, the operator may choose to accept the current value by selecting the ENTER key or may enter a 0 z new value by keying in the new value, followed by C selecting the ENTER key.
N The operator is warned if the entered value is not 00 within the valid parameter range invalid values are M not accepted.
The Solids Density parameter defines the density in gpl of the dry mineral solids in the slurry being tested.
The Solids Density parameter is retained in nonvolatile memory and may be modified by selecting the SETUP key.
When selected, the Solids Density screen displays the current setting, the operator may choose to accept the current value by selecting the ENTER key or may enter a new value by keying in the new value, followed by selecting the ENTER key.
The operator is warned if the entered value is not within the valid parameter range invalid values are not accepted.
The Auto Timer Off parameter defines the time the unit will remain online without any keypad entry.
The Auto Timer Off parameter is retained in nonvolatile memory and may be modified by selecting the SET UP key.
When selected, the Auto Timer Off screen displays the current setting, the operator may choose to accept the current value by selecting the ENTER key or may enter a new value by keying in the new value, followed by HAangea!Nccp\GRM SpecA60675-99.doc 22/11/06 selecting the ENTER key.
0 z The operator is warned if the entered value is not C within the valid parameter range invalid values are not accepted.
0 In use of the apparatus, an operator enters the Volume Set Sparameter, the Solids Density parameter, and the Auto Timer Off parameter and then follows the sequence shown in the O 10 figure. The sequence illustrates a situation in which the operator decides not to accept the current value of the liquid density parameter and uses the apparatus to calculate the value. The sequence includes the following steps: Zero Set The first step is to zero the load cell/strain gauge output for the container that will hold the slurry being tested.
When the ZERO key is selected, the ZERO screen appears with the current Zero Set value displayed. The operator may choose to accept the current value by selecting the ENTER key or may calculate a new value by suspending the empty container from the load cell and select the ZERO function key. The new Zero Set value is displayed and the operator selects the ENTER key to save the Zero Set value.
Future weighing automatically subtracts the Zero Set value from the measured load cell output.
Calibrate This step calculates the density of the liquid in use.
This will provide a reference point against which the H\angealkceep\GRM SpeciA6O675.99.doc 22/i If -16-
O
C' percentage solids and grams solid per litre of slurry of a subsequent slurry sample can be determined.
0 z c- When the CAL. key is selected, the Calibrate screen C 5 appears with the current Calibrate value displayed. The operator may choose to accept the current value by 00 selecting the ENTER key or may enter a new value by Ckeying in the new value, followed by selecting the ENTER key. If the liquid density is unknown, the O 10 Calibrate function can be initiated by selecting the CAL key. To calculate the liquid density, the operator C- suspends the container full of liquid from the load cell and selects the CAL. function key. The new Calibrate value is calculated and is displayed and the operator selects the ENTER key to save the value as the Liquid Density parameter.
Calculate This step calculates and displays the following calculated values from a measured weight of the slurry and the pre-inputted values of volume and specific densities of the liquid and the solids: Slurry Density (gpl) Slurry percent solids (by weight) Slurry percent solids (by volume) Grams solid per litre of slurry (gpl) The operator suspends a container full of slurry from the load cell and selects the CALC function key. The values of slurry density and the other properties listed above are calculated and displayed.
The above-described apparatus is a significant improvement over spring balances.
H:angelateep\GRM Spcci60675-99.doc 22/11/06 IND- 17- SUnlike the spring balances, the apparatus of the present invention is not limited to the use of a solution 0 z of specific gravity of 1.0. The apparatus can be used to C directly determine the density of the process liquids and C 5 retain this value for ongoing use in its programmed routines and sub-routines for the determination of the 00above material attributes In addition, the apparatus is Snot constrained by the use of water at a specific gravity of 1.000 for the determination of Solids Specific Gravity.
ID Unlike the spring balances which require an c exact volume of 1000 ml of sample for the determination of commonly measured slurry properties and solids specific gravity and subsequent manual calculations to arrive at a result the balance of the present invention will accept any volume of sample.
Furthermore, unlike the spring balances which require an exact amount of 1000 grams of solids for the determination of solids specific gravity and subsequent manual calculations to arrive at a result the balance of the present invention will accept any amount of solids and return a precise result for specific gravity in a single operation. This attribute of the present invention makes it easy to deal with broken rock samples which cannot be easily sub-divided to an exact weight.
The apparatus of the present invention is both mechanically simple and robust. It has no moving parts.
The high resolution load cell is protected from the environment by the unit's corrosion resistant, stainless steel construction. The electronic heart of the unit is protected by an IP65 rated housing and the whole unit is constructed with inherent shock resistance.
The accuracy of the apparatus of the present invention is maintained by a simple calibration process HA\.goI.Nsep\GRM SpmiA60675-99.dm 22/11/06 18-
\O
O balance involving the use of a known weight which maintains the validity of the load cell output. The balance features z a multiple stack output memory which enables the operator to access the full range of the unit's subroutines and then C 5 retrieve the generated data by scrolling through the memory stack. This output is preferably displayed on a backlit 00 liquid crystal display (LCD) which eliminates the need for Sexcellent local lighting conditions.
Power supply for the unit is available from stepped down 240 110 volts AC or from an independent C- rechargeable 12 volt DC battery.
The apparatus of the present invention comprises four principal components: PCB, LCD, load cell and power source. Maintenance of the unit can be carried out by a competent electrician and replacement components are readily available.
In summary the key features that distinguish the apparatus of the present invention from the spring balance are that it: is not limited to the use of a liquid of specific gravity of 1.0 for the determination of commonly measured slurry properties; (ii) is not constrained by an exact weight of 1000 g of solid material for the determination of solid specific gravity; (iii) is not constrained by a sample volume of 1000ml of slurry for determination of commonly measured slurry properties; (iv) can use a fixed or variable volume of H\ange1Mkccp\GRM Speci60675-99.doc 22/11/06 \O 19- ~c slurry to calculate the physical properties of:
O
S- Slurry Density (gpl) S 5 Slurry percent solids (by weight) Slurry percent solids (by volume) Grams solid per litre of slurry (gpl) c Solids Specific Gravity; S 10 offers the capacity to simply determine pulp properties which are not available with the spring balance: Slurry percent solids (by volume) Grams solid per litre of slurry (gpl); (vi) is not constrained by the use of water of a specific gravity of 1.000 for the determination of solids specific gravity; (vii) offers subroutines for the determination of: Passing Screen Size Solid Specific Gravity (SG); (viii)provides a continuous data output over a wide range of material and pulp specific gravities; (ix) is characterised by the superior accuracy of digital technology over mechanical analogue technology; is unaffected by the physical and chemical contaminants commonly present in mineral processing environments; H\an g eIahkeep\RM Spea\A6067599.doc 22/11/06 20 (xi) is simply and accurately recalibrated; and
O
z c (xii) has no moving parts.
cK Many modifications may be made to the preferred 00 embodiment described above without departing from the Cspirit and scope of the present invention.
O\
c H:\angelahtkep\GRM Spdi\60675-99 dm 22111/06
Claims (4)
- 21- CLAIMS: 0 z 1i. An apparatus for calculating the density C and/or the specific gravity of a sample of a slurry which includes solids in a liquid, which apparatus includes: 00 an electric means for measuring the weight Sof a known volume of the slurry; and ID 10 (ii) an electronic computing means for calculating the slurry density and/or the c specific gravity of the slurry from the measured weight of the slurry and the known volume of the slurry sample. 2. The apparatus defined in claim 1 wherein the electric measuring means is a load cell or a strain gauge. 3. The apparatus defined in claim 1 or claim 2 wherein the electronic computing means includes a means for confirming a stored value of the known volume of the slurry or for inputting another value of the volume. 4. The apparatus defined in any one of the preceding claims wherein the apparatus is also capable of calculating the percent solids of the slurry and/or the grams solid per litre of the slurry. The apparatus defined in claim 4 wherein the electronic computing means includes a means for confirming a stored value of the density of the liquid component of the slurry or for inputting another value of the liquid density for use in calculating the percent solids of the slurry and/or the grams solid per litre of the slurry. 6. The apparatus defined in claim 5 wherein the value of the liquid density is calculated from the weight H \..gealakeep\GRM Spec\60675-99doc 22/I /06 IND-
- 22- C of a known volume of the liquid measured by the electric measuring means. z C 7. The apparatus defined in any one of claims 4 to 6 wherein the electronic computing means includes a means for confirming a stored value of the specific gravity 0 or the density of the solids component of the slurry or for inputting another value of the solids density for use in calculating the percent solids of the slurry and/or the N 10 grams solid per litre of the slurry. 8. The apparatus defined in any one of the preceding claims wherein the electronic computing means includes a means for confirming a stored value of the weight of a container for holding the slurry to be tested or for inputting another value of the container weight so that the value of the container weight can be taken into account in calculations of the slurry density and other parameters by the electronic computer means. 9. The apparatus defined in claim 8 wherein the value of the container weight be a value measured by the electric measuring means. 10. An apparatus for calculating any one or more of the parameters of the density of a slurry, the specific gravity of the slurry, the percent solids of the slurry, and the gram solid per litre of the slurry, which slurry includes solids in a liquid, which apparatus includes: an electric means for measuring the weight of a volume of the slurry; and (ii) an electronic computing means for calculating one or more of the parameters from the measured weight and data on the properties of the slurry, the solids, and HAangclacecp\GRM Speci\60675-99.doc 22J1 1/06 IND-
- 23- O the liquid required for the calculation that has already been inputted into and 0 z stored in the electronic computer means. C 5 11. The apparatus defined in claim 10 wherein the inputted and stored data includes the volume of the 0 slurry, the density of the solids, and the density of the Sliquid. 12. A method of calculating the density and/or the specific gravity of a slurry which includes solids in a liquid, which method includes the steps of: confirming a value of a volume of a slurry sample to be tested, which value is stored in an electronic computing means, or inputting another value of the slurry volume into the electronic computing means; (ii) measuring the weight of the slurry sample using an electric measuring means; and (iii)calculating the slurry density and/or the specific gravity of the slurry using the electronic computing means and the confirmed or inputted value of the slurry volume and the measured value of the weight of the slurry sample. 13. The method defined in claim 12 wherein the method also includes the option of calculating the percent solids of the slurry and/or the grams solid per litre of the slurry. 14. The method defined in claim 13 wherein, in order to make the calculations of the slurry percent solids and/or grams solid per litre of the slurry, the method IiAhngeIatkeep\GM SpectA60675-99.doc 22/I 1106
- 24- Sincludes: z confirming a value of the density of the C liquid component of the slurry, which value (C 5 is stored in the electronic computing means, or inputting another value of the liquid 00 density into the electronic computing means; M and S 10 (ii) confirming a value of the density of the solids component of the slurry, which value c- is stored in the electronic computing means, or inputting another value of the solids density into the electronic computing means. HAangcIahkeep\GRM SpecMO675-99.doc 22/I 1106
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2006241318A AU2006241318A1 (en) | 1998-08-31 | 2006-11-22 | A balance |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPP5576 | 1998-08-31 | ||
| AU2003262356A AU2003262356A1 (en) | 1998-08-31 | 2003-11-19 | A balance |
| AU2006241318A AU2006241318A1 (en) | 1998-08-31 | 2006-11-22 | A balance |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2003262356A Division AU2003262356A1 (en) | 1998-08-31 | 2003-11-19 | A balance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2006241318A1 true AU2006241318A1 (en) | 2006-12-14 |
Family
ID=37561436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2006241318A Abandoned AU2006241318A1 (en) | 1998-08-31 | 2006-11-22 | A balance |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2006241318A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112255140A (en) * | 2020-10-10 | 2021-01-22 | 柳州工学院 | Intelligent liquid density detector |
-
2006
- 2006-11-22 AU AU2006241318A patent/AU2006241318A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112255140A (en) * | 2020-10-10 | 2021-01-22 | 柳州工学院 | Intelligent liquid density detector |
| CN112255140B (en) * | 2020-10-10 | 2023-07-25 | 柳州工学院 | Intelligent detector for liquid density |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK4 | Application lapsed section 142(2)(d) - no continuation fee paid for the application |