CN110823320A - Sand level detection method and system for sand box of railway vehicle - Google Patents
Sand level detection method and system for sand box of railway vehicle Download PDFInfo
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- 239000004576 sand Substances 0.000 title claims abstract description 182
- 244000035744 Hura crepitans Species 0.000 title claims abstract description 136
- 238000001514 detection method Methods 0.000 title claims abstract description 73
- 230000005540 biological transmission Effects 0.000 claims abstract description 25
- 238000004891 communication Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000007599 discharging Methods 0.000 description 1
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- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
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Abstract
The invention discloses a sand level detection method and system for a sand box of a railway vehicle, and relates to the technical field of rail transit equipment. The detection method comprises the following steps: constructing a function model of the sand position detection distance and the volume of the residual sand in the sand box; measuring at least one front sand position detection distance and at least one rear sand position detection distance in the sand box; obtaining an average sand position detection distance in the sand box according to the front sand position detection distance and the rear sand position detection distance; substituting the average sand level detection distance into a function model to obtain the volume of the residual sand in the sand box; and displaying the proportion and the volume of the residual sand in the cab of the railway vehicle, and giving an alarm to prompt a driver to add the sand into the sand box when the proportion of the residual sand is lower than 15%. The method relates to the fact that a driver can accurately judge whether sand needs to be injected into a sand box or not in driving. The detection system comprises an infrared laser ranging sensor, a data transmission module, a data processor, a display module and an alarm module. After the system is installed, the sealing performance of the sand box cannot be damaged.
Description
Technical Field
The invention relates to the technical field of rail transit equipment, in particular to a sand level detection method and system for a sand box of a rail vehicle.
Background
Due to the complex running environment and high speed of the motor train unit, when severe weather such as rain, snow and the like occurs, the rail is very wet and slippery, and the risk of idling during traction or gliding during braking easily occurs. In order to improve the adhesion between the wheels and the rail surface, a sanding device is generally assembled on the motor train unit. The sanding device consists of a sand box and a sand discharge unit, and the sand discharge amount of the sanding device is controlled by a driver or a train brake system. In order to ensure the operation safety, enough sand amount needs to be ensured in the sand box, so that the sand box needs to be added with sand timely. Because the sand box is generally placed at the bottom of the vehicle body and is limited by the installation position of the sand box, an operator cannot directly observe or detect the height of a sand surface in the sand box, and then judgment of a driver on the flow rate of the adjusted sand and the sand injection amount is influenced.
Chinese patent No. 201310461922.8 discloses a device for detecting the sand amount position in a sand box of a rail transit vehicle, which is characterized in that a pressure sensor is arranged at the bottom of the sand box for detecting the weight of the sand box in real time, so as to judge the sand amount according to the weight of the sand box and further control the sand adding time and the sand adding amount. Because the forms of the sand boxes are various and the sand boxes are not regular containers, different programs are written for different shapes of the sand boxes with different shapes and different parts of the sand boxes to be converted, and the sand boxes are complicated and are not beneficial to the unification of specifications; when the vehicle runs on a long slope or a curve, the sand is acted by centrifugal force, the force acted on the sensor is increased or reduced, so that the sand yield cannot be measured correctly, and the sand-free measuring device is not suitable for being used on the rail vehicle which is put into operation.
Chinese patent No. 201720359609.7 discloses a device for detecting sand amount and position in a sand box of a rail transit vehicle, which is characterized in that small balls made of different materials are arranged outside the sand box and connected by a rope with scales, and the device has the following defects: on one hand, when the device is adopted, a driver master wants to know the sand amount and needs to get off to observe; on the other hand, the mobility of sand and stone in the sand box is ensured in the running process of the vehicle, so that substances such as water, oil and the like are prevented from entering the sand box, and the sealing performance cannot be ensured because the ropes are movable parts which go in and out of the sand box, so that the risk of idling when the rail transit vehicle is dragged or sliding when the rail transit vehicle is braked due to no sand blasting is caused; further, the shaking of the vehicle during the forming process, coupled with the mobility of the sand, may obliterate the pellets and prevent the correct measurement of the sand content of the flask.
Disclosure of Invention
The invention provides a sand level detection method and system for a sand box of a railway vehicle, which can alleviate the problems.
In order to alleviate the above problems, the technical scheme adopted by the invention is as follows:
in a first aspect, the invention provides a sand level detection method for a sand box of a railway vehicle, which comprises the following steps:
s1, constructing a function model of the sand position detection distance and the volume of the residual sand in the sand box, wherein the sand position detection distance refers to the linear distance from the inner side surface of the top cover of the sand box to the sand surface in the sand box;
s2, measuring at least one front sand position detection distance and at least one rear sand position detection distance in the sand box;
s3, calculating the average sand position detection distance in the sand box according to the front sand position detection distance and the rear sand position detection distance;
s4, substituting the average sand level detection distance into the function model to obtain the volume of the residual sand in the sand box;
s5, calculating the proportion of the volume of the residual sand to the volume of the full sand in the sand box, displaying the proportion and the volume of the residual sand in the cab of the railway vehicle, and alarming to prompt a driver to add the sand into the sand box when the proportion is lower than 15%.
The technical effect of the technical scheme is as follows: a driver can directly obtain the residual sand amount in the sand box in driving, and can accurately judge whether sand needs to be injected into the sand box; according to the method, the average value is obtained after the multipoint sand position detection distances are measured, so that the data accuracy can be ensured, and the problem of inaccurate data measurement caused by uneven sand surface in the sand box is avoided to a great extent.
In a second aspect, the present invention provides a sand level detection system for a sand box of a rail vehicle, comprising:
the device comprises at least two infrared laser ranging sensors, a sand box and a sand box cover, wherein the infrared laser ranging sensors are arranged on the inner side of the sand box cover, infrared rays of the infrared laser ranging sensors can vertically and downwards irradiate the sand surface in the sand box and are used for measuring the detection distance of the sand position;
the data transmission module is electrically connected with the infrared laser ranging sensor;
the data processor is arranged in a cab of the rail vehicle, is in communication connection with the infrared laser ranging sensor through the data transmission module, receives the sand position detection distance data, and calculates to obtain the volume of the residual sand and the proportion of the residual sand to the volume of the full sand in the sand box;
the display module is arranged in a cab of the railway vehicle, is electrically connected with the data processor and is used for displaying the volume of the residual sand in the sand box and the proportion of the residual sand to the volume of the full sand in the sand box;
and the alarm module is arranged in the railway vehicle cab and electrically connected with the data processor and used for sending alarm information to a driver in the railway vehicle cab.
The technical effect of the technical scheme is as follows: the utility model provides a system for realize accurate detection of rail vehicle sand box sand position, this system can not cause the destruction to the leakproofness of sand box after the installation, has avoided the unusual sandblast of sand box.
Optionally, the data transmission module is the wifi module, and it includes wifi transmission module and wifi receiving module group, wifi transmission module group install in sand box top cap inboard, and with infrared laser range sensor electric connection, wifi receiving module group install in rail vehicle driver's cabin, and with data processor electric connection, wifi transmission module group with wifi receiving module group radio signal connects.
The technical effect of the technical scheme is as follows: the wireless transmission of data can be realized, the wiring is not needed, and the installation and maintenance are convenient.
Optionally, the wifi module is model Esp 8266.
Optionally, the data processor is of the type ATMEGA 328P.
Optionally, the infrared laser ranging sensor is of a model TOF 10120.
Optionally, be provided with the 5V battery in sand box top cap inboard, its with wifi transmission module electric connection is used for doing wifi transmission module power supply.
The technical effect of the technical scheme is as follows: the wifi transmission module in the sand box does not need an external power supply.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a block diagram of a sand level detection system of a rail vehicle flask according to an embodiment;
FIG. 2 is a schematic diagram of the installation layout of the wifi transmitting module and the infrared laser ranging sensor in the sand box in the embodiment;
FIG. 3 is a schematic diagram of the overall layout of the infrared laser ranging sensors with respect to the wheel pairs and the sand boxes of the rail vehicle in an embodiment;
in the figure: the device comprises a sand box top cover 1, a 2-wifi transmitting module, a 3-infrared laser ranging sensor, a 4-sand box, a 5-air outlet pipe, a 6-sand outlet pipe, a 7-sand spreading outlet and an 8-wheel pair.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
The embodiment provides a sand level detection method for a sand box of a railway vehicle, which comprises the following steps:
s1, constructing a function model of the sand position detection distance and the volume of the residual sand in the sand box, wherein the sand position detection distance refers to the linear distance from the inner side surface of the top cover of the sand box to the sand surface in the sand box;
s2, measuring at least one front sand position detection distance and at least one rear sand position detection distance in the sand box;
s3, calculating the average sand position detection distance in the sand box according to the front sand position detection distance and the rear sand position detection distance;
s4, substituting the average sand level detection distance into the function model to obtain the volume of the residual sand in the sand box;
s5, calculating the proportion of the volume of the residual sand to the volume of the full sand in the sand box, displaying the proportion and the volume of the residual sand in the cab of the railway vehicle, and alarming to prompt a driver to add the sand into the sand box when the proportion is lower than 15%.
Referring to fig. 2, because of the limitation of the air outlet pipe 5 and the sand outlet pipe 6 in the prior art, the sand amount of the sand box can only be between the highest sand amount line and the lowest sand amount line, the distance from the inner side surface of the top cover of the sand box to the highest sand amount line corresponds to 100% of the sand amount in the sand box, and the distance from the inner side surface of the top cover of the sand box to the lowest sand amount line corresponds to 0% of the sand amount in the sand box.
In step S1, under the condition that the structure of the flask is determined, a function model of the sand position detection distance and the volume of the remaining sand in the flask is constructed as follows:
a. calculating to obtain the maximum sand volume V in the sand box according to the highest sand position line A and the lowest sand position line B in the sand box;
b. filling sand into the sand box;
c. discharging the sand in the sand box, weighing the mass m of the discharged sand when the sand surface is lowered by 5mm, 10mm and 15mm …, and calculating the volumes V1, V2 and V3 … of the discharged sand when the sand surface is lowered by 5mm, 10mm and 15mm … according to the sand density rho;
d. obtaining a residual sand volume V11 by V-V1, obtaining a residual sand volume V12 by V11-V2, obtaining a residual sand volume V13 by V12-V3, and so on, namely obtaining the residual sand volume in the sand box when the sand surface in the sand box descends 5mm (namely the sand position detection distance increases 5 mm).
And d, repeatedly measuring the volume of the residual sand in the sand box every time the sand position detection distance is increased by 5mm according to the steps b-d, respectively averaging the V11, V12 and V13 … to obtain V111, V112 and V113 …, respectively, fitting a curve according to the V111, V112 and V113 … and the data of the sand position detection distance increased by 5mm, and then obtaining a function model of the sand position detection distance and the volume of the residual sand.
In the present embodiment, steps S3, S4, S5 are preferably performed in the cab of the railway vehicle.
In step S2 of the present embodiment, the front and rear positions correspond to the traveling direction of the rail vehicle, and the traveling direction is indicated by C with reference to fig. 3.
Because the sand surface in the sand box is not always level due to factors such as nodding and tilting of the rail vehicle, and the sand level detection distance of a single point is difficult to accurately represent the sand amount in the sand box, in step S2 of the embodiment, at least one front sand level detection distance and at least one rear sand level detection distance are measured in one sand box, and in step S3, an average sand level detection distance is obtained, so that the sand amount in the sand box can be accurately represented through the average sand level detection distance, that is, the average sand level detection distance is substituted into the function model, and the volume of the residual sand in the sand box can be accurately obtained. Experiments show that in one sand box, the measurement error of only a single point is measured, the measurement error under various conditions is 15% -25%, and the measurement error under various conditions is less than 3% by measuring the multi-point sand position detection distance and calculating the average sand position detection distance.
Example 2
Referring to fig. 1, 2 and 3, the present embodiment provides a sand level detecting system for a sand box of a rail vehicle, including:
the device comprises at least two infrared laser ranging sensors 3, a sand box top cover 1 and a sand box bottom cover, wherein the infrared laser ranging sensors 3 are arranged on the inner side of the top cover of the sand box 4, infrared rays of the infrared laser ranging sensors can vertically and downwards irradiate the sand surface in the sand box 4 and are used for measuring the detection distance of the sand position, and the infrared laser ranging sensors 3 are arranged in the front area and the rear area of the inner side surface of the top cover 1 of the sand box;
the data transmission module is electrically connected with the infrared laser ranging sensor 3;
the data processor is arranged in a cab of the rail vehicle, is in communication connection with the infrared laser ranging sensor through the data transmission module, receives the data of the detection distance of the sand position, and calculates to obtain the volume of the residual sand and the proportion of the residual sand to the volume of the full sand in the sand box;
the display module is arranged in a cab of the railway vehicle, is electrically connected with the data processor and is used for displaying the volume of the residual sand in the sand box and the proportion of the residual sand to the volume of the full sand in the sand box;
and the alarm module is arranged in the railway vehicle cab, is electrically connected with the data processor and is used for sending alarm information to a driver in the railway vehicle cab.
As a structural choice of this embodiment, the data transmission module can select the wifi module for use, and the wifi module includes that wifi transmission module 2 and wifi receive the module, and wifi transmission module 2 is installed in 1 inboards of sand box top cap to with 3 electric connection of infrared laser range sensor, wifi receives the module and installs in rail vehicle driver's cabin, and with data processor electric connection, wifi transmission module receives module radio signal with wifi and is connected, in order to realize the wireless transmission of sand position detection distance data.
In this embodiment, with wifi transmission module 2 and the integration of infrared laser range sensor 3 and install in sand box top cap 1 inboard, both easy to assemble overhauls, does not influence the structure and the use of sand box again.
In the present embodiment, the wifi module may be selected as Esp8266, the data processor may be selected as ATMEGA328P, and the infrared laser ranging sensor 3 may be selected as TOF 10120.
As a structural choice of this embodiment, be provided with 5V battery at sand box top cap 1 inboard, its and wifi transmission module electric connection for wifi transmission module power supply, just so need not external power supply, and the relevant module of installing in the rail vehicle driver's cabin then directly obtains the power from the driver's cabin.
As a structural choice of this embodiment, the display module can select the led display, and the alarm module can select the audible and visual alarm.
Referring to fig. 3, the conventional rail vehicle generally has two flasks 4, and the two flasks 4 are used to sand the two rails, and the left and right flasks 4 are used to sand simultaneously, so that the remaining amount of the two flasks 4 should be the same. In order to ensure more accuracy, the laser ranging sensors 3 are arranged in each sand box 4, and the laser ranging sensors 3 in the two sand boxes 4 transmit the sand position detection distance data of each sand box to the data processor through the data transmission module. In this embodiment, an infrared laser distance measuring sensor is installed at each of front and rear regions of the inner side surface of the flask top cover of one of the flasks 4.
Because the sand box 4 has hot air flowing inside, the track is not smooth to cause the vibration of the sand box, the track vehicle passes through the curve to cause the side inclination of the sand box and the like, and the sand surface inside the sand box is not necessarily flat, so the laser ranging sensors are arranged at the front and back symmetrical positions of the left sand box and the right sand box in the embodiment, the data processor needs to process the data of the 4 sensors at the same time, and the residual sand volume of the two sand boxes and the proportion of the residual sand to the full sand volume in the sand box are calculated. For only installing an infrared laser range sensor in a sand box, its sand position detection distance that can record the fore-and-aft position, through the average value of the sand position detection distance with the fore-and-aft position, can obtain more accurate sand position detection distance.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A sand level detection method of a sand box of a railway vehicle is characterized by comprising the following steps:
s1, constructing a function model of the sand position detection distance and the volume of the residual sand in the sand box, wherein the sand position detection distance refers to the linear distance from the inner side surface of the top cover of the sand box to the sand surface in the sand box;
s2, measuring at least one front sand position detection distance and at least one rear sand position detection distance in the sand box;
s3, calculating the average sand position detection distance in the sand box according to the front sand position detection distance and the rear sand position detection distance;
s4, substituting the average sand level detection distance into the function model to obtain the volume of the residual sand in the sand box;
s5, calculating the proportion of the volume of the residual sand to the volume of the full sand in the sand box, displaying the proportion and the volume of the residual sand in the cab of the railway vehicle, and alarming to prompt a driver to add the sand into the sand box when the proportion is lower than 15%.
2. The utility model provides a rail vehicle sand box sand position detecting system which characterized in that includes:
the device comprises at least two infrared laser ranging sensors, a sand box and a sand box cover, wherein the infrared laser ranging sensors are arranged on the inner side of the sand box cover, infrared rays of the infrared laser ranging sensors can vertically and downwards irradiate the sand surface in the sand box and are used for measuring the detection distance of the sand position;
the data transmission module is electrically connected with the infrared laser ranging sensor;
the data processor is arranged in a cab of the rail vehicle, is in communication connection with the infrared laser ranging sensor through the data transmission module, receives the sand position detection distance data, and calculates to obtain the volume of the residual sand and the proportion of the residual sand to the volume of the full sand in the sand box;
the display module is arranged in a cab of the railway vehicle, is electrically connected with the data processor and is used for displaying the volume of the residual sand in the sand box and the proportion of the residual sand to the volume of the full sand in the sand box;
and the alarm module is arranged in the railway vehicle cab and electrically connected with the data processor and used for sending alarm information to a driver in the railway vehicle cab.
3. The rail vehicle sand box sand level detecting system of claim 2, wherein the data transmission module is a wifi module, which includes a wifi transmitting module and a wifi receiving module, the wifi transmitting module is installed inside the top cover of the sand box and electrically connected to the infrared laser ranging sensor, the wifi receiving module is installed in the cab of the rail vehicle and electrically connected to the data processor, and the wifi transmitting module is in wireless signal connection with the wifi receiving module.
4. The rail vehicle sand box sand level detection system of claim 3 wherein said wifi module is model number Esp 8266.
5. The rail vehicle flask sand level detection system of claim 3, wherein the data processor is of the type ATMEGA 328P.
6. The rail vehicle sand box sand level detection system of claim 3, wherein the infrared laser ranging sensor is of the type TOF 10120.
7. The rail vehicle sand box sand level detection system of claim 3, wherein a 5V battery is arranged on the inner side of the top cover of the sand box and electrically connected with the wifi transmitting module for supplying power to the wifi transmitting module.
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| CN201911177650.2A CN110823320A (en) | 2019-11-27 | 2019-11-27 | Sand level detection method and system for sand box of railway vehicle |
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| CN201911177650.2A CN110823320A (en) | 2019-11-27 | 2019-11-27 | Sand level detection method and system for sand box of railway vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113358177A (en) * | 2021-06-16 | 2021-09-07 | 上海联宠智能科技有限公司 | Method for improving accuracy of measuring allowance of cat litter in cat litter basin |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487109A (en) * | 2013-09-30 | 2014-01-01 | 南车株洲电力机车有限公司 | Device for detecting sand amount position in sand box of rail transport vehicle |
| CN106643962A (en) * | 2016-11-18 | 2017-05-10 | 郑州格兰高环境工程有限公司 | Method for accurately calculating capacity of liquid in irregular tank |
| CN109073447A (en) * | 2016-02-11 | 2018-12-21 | 乌比克瓦系统公司 | For assessing the method and system of the inner capacities of container memory storage |
-
2019
- 2019-11-27 CN CN201911177650.2A patent/CN110823320A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487109A (en) * | 2013-09-30 | 2014-01-01 | 南车株洲电力机车有限公司 | Device for detecting sand amount position in sand box of rail transport vehicle |
| CN109073447A (en) * | 2016-02-11 | 2018-12-21 | 乌比克瓦系统公司 | For assessing the method and system of the inner capacities of container memory storage |
| CN106643962A (en) * | 2016-11-18 | 2017-05-10 | 郑州格兰高环境工程有限公司 | Method for accurately calculating capacity of liquid in irregular tank |
Non-Patent Citations (1)
| Title |
|---|
| 吴小安 等: "高适配性无线智能贴片锁的设计与实现", 《电子制作》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113358177A (en) * | 2021-06-16 | 2021-09-07 | 上海联宠智能科技有限公司 | Method for improving accuracy of measuring allowance of cat litter in cat litter basin |
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