CN110926584B - Multi-sensor electronic scale landing detection system and method - Google Patents
Multi-sensor electronic scale landing detection system and method Download PDFInfo
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- CN110926584B CN110926584B CN201911414791.1A CN201911414791A CN110926584B CN 110926584 B CN110926584 B CN 110926584B CN 201911414791 A CN201911414791 A CN 201911414791A CN 110926584 B CN110926584 B CN 110926584B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
- G01G23/012—Testing or calibrating of weighing apparatus with load cells comprising in-build calibration weights
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/40—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight
- G01G19/413—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means
- G01G19/414—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
- G01G3/14—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing measuring variations of electrical resistance
- G01G3/142—Circuits specially adapted therefor
- G01G3/145—Circuits specially adapted therefor involving comparison with a reference value
Abstract
The invention discloses a multi-sensor electronic scale landing detection system and a method, wherein the system comprises an electronic scale landing detection controller, a plurality of bidirectional multi-path electronic switches and an upper computer, and the control switches or the upper computer trigger the electronic scale landing detection controller to control the bidirectional multi-path electronic switches so as to realize the switching of an electronic scale landing detection mode and a weighing mode. After entering an electronic scale landing detection mode, loading a certain weight on each sensor landing point of the electronic scale and unloading, judging whether each landing point lands solidly or not through the variable quantity of two no-load signals before and after the weight is loaded by the sensor, and entering a normal weighing mode of the electronic scale after all landing point detections are finished.
Description
Technical Field
The invention belongs to the technical field of electronic scale measurement, and particularly relates to a multi-sensor electronic scale landing detection system and method.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The electronic scale is a measuring tool which is very commonly applied and is widely used in the fields of daily life, commercial transactions, industrial production and the like. The electronic scale is a very precise tool, special attention needs to be paid to leveling and stable placing during installation or placement, particularly for the multi-sensor electronic scale, all the sensor landings need to be landed and compacted, otherwise, the weighing weight is deviated due to unstable stress of the sensors.
When the multi-sensor electronic scale is installed and used, people usually start to use the multi-sensor electronic scale after leveling according to level indication, whether the touchdown point of each sensor is in good contact with the ground or not is simply checked only by an observation mode, the judgment cannot be accurately carried out, some sensor touchdown points seem to have landed by naked eyes, but whether the touchdown point is true or not cannot be judged, and particularly, verification is carried out on a platform scale or a large weighbridge through scale and unbalance loading tests which are carried out continuously for a long time, so that time and labor are wasted, and the installation difficulty is high.
Some researchers have also respectively detected each sensor of the multi-sensor electronic scale at present, but all aim at the horizontal detection of the electronic scale platform, and do not relate to the practical problem of each landing place of the electronic scale, from the detection system, the detection method and the detection principle, the horizontal detection of the electronic scale and the practical detection of the landing place of the electronic scale are not the same thing at all, the horizontal problem of the electronic scale is generally easy to be realized by a horizontal indicating device of the electronic scale platform, but no effective solution is provided for the practical problem of the landing place of the electronic scale sensor at present, and the invention is provided for the practical detection of each landing place of the multi-sensor electronic scale.
At present, a detection system for multiple sensors of an electronic scale adopts a sensor weight value obtained after data processing is carried out on an original AD value as a calculation basis, the original AD value of a sensor signal is not adopted, the weight value is greatly reduced in data digit and precision coefficient relative to the original AD value, and accurate detection cannot be realized by adopting the weight value for a high-precision electronic scale.
Meanwhile, the multi-sensor detection system related at present does not have a mode switching function, a detection circuit and a normal weighing circuit are not thoroughly separated, when the electronic scale is used for weighing normally, a sensor signal, a detection circuit signal and a terminal box signal of the electronic scale are overlapped and interfered with each other, the signals may be very weak, and no influence is caused compared with a digital signal.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a multi-sensor electronic scale landing detection system and a method.
In order to achieve the above object, one or more embodiments of the present invention provide the following technical solutions:
a multi-sensor electronic scale landing detection system is applied to an electronic scale and comprises an electronic scale landing detection controller, a plurality of bidirectional multi-path electronic switches and an upper computer, wherein the number of the bidirectional multi-path electronic switches is consistent with that of sensors in the electronic scale; the public ends of the bidirectional multi-path electronic switches are respectively connected with the outgoing lines of the sensors, and the bidirectional switching ends are respectively connected with the electronic scale landing detection controller and the electronic scale junction box;
the plurality of bidirectional multi-path electronic switches correspond to a weighing mode in a first state, and the sensors are connected to an electronic scale junction box; the plurality of bidirectional multi-path electronic switches correspond to a grounding detection mode in the second state, and the sensors are all connected to the electronic scale grounding detection controller.
Further, the electronic scale landing detection controller comprises a control unit and an AD conversion module connected with the control unit, and in the landing detection mode, the AD conversion module converts analog signals of the sensors into digital AD values and transmits the digital AD values to the control unit.
Further, the electronic scale landing detection controller further comprises a display module connected with the control unit and used for displaying the measured AD value of the sensor and the landing detection result.
Furthermore, the electronic scale landing detection controller also comprises a control switch connected with the control unit, and the control unit controls the bidirectional switching of the bidirectional multi-path electronic switch according to the state of the control switch to realize the switching of the weighing mode and the landing detection mode.
Further, the upper computer is connected with the electronic scale landing detection controller; and the electronic scale landing detection controller transmits the AD value and the landing detection result measured by each sensor to an upper computer in real time.
Furthermore, the upper computer can also be used for sending a switching instruction of the weighing mode and the landing detection mode to the electronic scale landing detection controller, so that switching between the two modes is realized.
One or more embodiments provide a landing detection method based on the multi-sensor electronic scale landing detection system, including the steps of:
(1) the electronic scale is horizontally placed, the no-load standing time exceeds a set threshold value, and the electronic scale is controlled to be switched from a weighing mode to a landing detection mode through a control switch or an upper computer;
(2) loading the weight meeting the set threshold range above any landing point of the electronic scale, and unloading after stabilizing the set time;
(3) the electronic scale lands and detects the controller and obtains every sensor signal in real time, detect appear meeting weight within the range of the threshold value and unload after the settling time exceeds the set time on the electronic scale, for the biggest change sensor of AD value measured, obtain the no-load AD value of the sensor before the weight is loaded, and the no-load AD value that the standing time exceeds the set threshold value after the weight is unloaded, compare the no-load AD value of two times, if the difference is smaller than the set threshold value, it is stable that the place lands, enter step (5); otherwise, judging that the corresponding landing place of the sensor is not in a real landing state, displaying the landing detection result through a display module and sending the landing detection result to an upper computer to remind the upper computer to adjust the landing place which is not in the real landing state, and entering the step (4);
(4) after the land is not actually touched, detecting the land again according to the steps (2) to (3);
(5) detecting the next landing place of the electronic scale until all the landing places of the electronic scale are stably landed;
(6) and after the grounding detection is finished, controlling the electronic scale to be switched from the grounding detection mode to the weighing mode through a control switch or an upper computer.
The above one or more technical solutions have the following beneficial effects:
the multi-sensor electronic scale detection system adopts a modular design, a grounding detection controller is additionally arranged in the existing electronic scale, a bidirectional multi-channel electronic switch is connected in series on a sensor lead wire which is directly connected into a junction box, when the switch switches the state, the sensor lead wire which is directly connected into the junction box can be connected into the electronic scale grounding detection controller in series, and common platform scales, weighbridges, hopper scales, belt scales and other multi-sensor scales can be used, so that the multi-sensor electronic scale detection system is convenient to install and simple to use.
The invention realizes the isolation of the normal weighing circuit and the landing detection circuit, ensures that the sensor signal can completely enter one system, and under the weighing mode, the sensor is connected with the electronic scale junction box and disconnected with the electronic scale landing detection controller, thereby avoiding the influence of the electronic scale landing detection circuit on the sensor signal and ensuring the accuracy of normal weighing; in the landing detection mode, the sensor is connected with the electronic scale landing detection controller and disconnected with the electronic scale junction box, and the landing detection is performed through the electronic scale landing detection system, so that the influence of a circuit of the electronic scale junction box on a sensor signal is avoided, and the accuracy of the landing detection is ensured.
The multi-sensor electronic scale detection system adopts the weight value judgment in the weight loading process, and adopts the original AD value of the sensor signal as the calculation and comparison basis in the locus detection link, so that the data digit and the precision coefficient of the original AD value of the sensor signal are greatly improved relative to the sensor weight value after data processing, and the detection system and the detection method are also suitable for locus detection of a high-precision electronic scale and have wider application range.
The invention also locates the position with unfinished grounding in the grounding detection of the multi-sensor electronic scale by the display device, prompts the installation and the operator to adjust the height of the grounding point, and finally ensures the electronic scale to be horizontal and all the grounding points to be grounded and solid by combining with the electronic scale level indicating device, thereby ensuring the accurate and stable work of the electronic scale.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a flow chart of a multi-sensor electronic scale touchdown detection method according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of a multi-sensor electronic scale touchdown detection system in accordance with one embodiment of the present invention;
in the figure, 1, a sensor; 2. a sensor lead; 3. a bidirectional multi-path electronic switch; 4. a landing detection system of the electronic scale; 5. an upper computer; 6. electronic scale terminal box.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
Example one
The embodiment discloses a multi-sensor electronic scale landing detection system, which is applied to an electronic scale and comprises an electronic scale landing detection controller, a plurality of bidirectional multi-path electronic switches and an upper computer, wherein the number of the bidirectional multi-path electronic switches is consistent with that of sensors in the electronic scale; the public ends of the bidirectional multi-path electronic switches are respectively connected with the outgoing lines of the sensors, and the bidirectional switching ends are respectively connected with the electronic scale landing detection controller and the electronic scale junction box; and the weighing mode and the landing detection mode are switched by controlling the switching of the plurality of bidirectional multipath electronic switches. Specifically, the number of each bidirectional multi-path electronic switch is consistent with the number of leads of the outgoing line of the sensor.
When the plurality of bidirectional multi-path electronic switches are in a first state, the plurality of sensors are connected to the electronic scale junction box, namely, the electronic scale is in a weighing mode, and the electronic scale can perform normal weighing work; the plurality of bidirectional multi-path electronic switches are in a second state such that the plurality of sensors are all connected to the electronic scale landing detection controller, i.e., in a landing detection mode in which landing detection of the electronic scale is performed.
The electronic scale junction box is connected with a weighing instrument, and the weighing instrument is used for collecting and displaying specific weighing values.
The electronic scale landing detection controller comprises a control unit, and an AD conversion module, a display module and a control switch which are connected with the control unit.
The AD conversion module also comprises a power amplifier which is used for amplifying the analog signals of the sensors, converting the analog signals into digital AD values and transmitting the digital AD values to the control unit. The display module is used for displaying the measured AD value of the sensor and the grounding detection result. The control unit controls the switching of the weighing mode and the landing detection mode according to the state of the control switch.
The landing detection system further comprises an upper computer which is connected with the electronic scale landing detection controller, specifically, the control unit in the electronic scale landing detection controller, and the upper computer is used for receiving and displaying a sensor signal AD value and a landing detection result in a landing detection mode. In order to realize the switching between the weighing mode and the landing detection mode, a user can send a control instruction to a control unit in the landing detection controller of the electronic scale based on an upper computer, and the control unit controls the switching between two states of the plurality of bidirectional multipath electronic switches.
The touchdown detection system may be battery powered.
Based on the above-mentioned landing detection system, the present embodiment also provides a landing detection method. In this embodiment, the electronic scale includes four sensors respectively disposed at four corners (i.e. four landing positions) of the electronic scale, and the four corners of the electronic scale are respectively landed for detection, which specifically includes:
(1) the electronic scale enters a landing condition detection mode, and signals of all sensors are accessed to a landing detection system of the electronic scale through a bidirectional multi-way switch;
(2) loading an article whose weight satisfies a set threshold value at one corner of the electronic scale, and unloading after a stable set time (in this embodiment, set to 5 seconds);
(3) the electronic scale lands and detects the controller and obtains every sensor signal in real time, detect and appear meeting the weight in the range of the threshold value and unload after the settling time exceeds the set time on the electronic scale, to the sensor that the greatest change of sensor signal AD value measured, obtain the empty load AD value before the weight loads of the sensor, and the empty load AD value that the standing time exceeds the set threshold value after the weight unloads, compare the empty load AD value of two times, if the difference is smaller than the set threshold value, it is stable that the place lands, enter step (5); otherwise, judging that the corresponding touchdown point of the sensor is not practical, displaying the touchdown detection result through a display module and sending the touchdown detection result to an upper computer, giving a prompt to the unrealistic touchdown point through a display device, reminding to adjust the unrealistic touchdown point, and entering the step (4);
(4) after the land is not actually touched, detecting the land again according to the steps (2) to (3);
(5) detecting the next landing place of the electronic scale until all the landing places of the electronic scale are stably landed;
(6) and after the grounding detection is finished, controlling the electronic scale to be switched from the grounding detection mode to the weighing mode through a control switch or an upper computer.
By adopting the landing detection system provided by the embodiment, a user can know whether each corner lands stably only by loading a certain weight at each corner of the electronic scale and unloading after keeping for 5 seconds.
One or more of the above embodiments have the following technical effects:
the multi-sensor electronic scale detection system adopts a modular design, a grounding detection controller is additionally arranged in the existing electronic scale, a bidirectional multi-channel electronic switch is connected in series on a sensor lead wire which is directly connected into a junction box, when the switch switches the state, the sensor lead wire which is directly connected into the junction box can be connected into the electronic scale grounding detection controller in series, and common platform scales, weighbridges, hopper scales, belt scales and other multi-sensor scales can be used, so that the multi-sensor electronic scale detection system is convenient to install and simple to use.
The invention realizes the isolation of the normal weighing circuit and the landing detection circuit, ensures that the sensor signal can completely enter one system, and under the weighing mode, the sensor is connected with the electronic scale junction box and disconnected with the electronic scale landing detection controller, thereby avoiding the influence of the electronic scale landing detection circuit on the sensor signal and ensuring the accuracy of normal weighing; in the landing detection mode, the sensor is connected with the electronic scale landing detection controller and disconnected with the electronic scale junction box, and the landing detection is performed through the electronic scale landing detection system, so that the influence of a circuit of the electronic scale junction box on a sensor signal is avoided, and the accuracy of the landing detection is ensured.
The multi-sensor electronic scale detection system adopts the weight value judgment in the weight loading process, and adopts the original AD value of the sensor signal as the calculation and comparison basis in the locus detection link, so that the data digit and the precision coefficient of the original AD value of the sensor signal are greatly improved relative to the sensor weight value after data processing, and the detection system and the detection method are also suitable for locus detection of a high-precision electronic scale and have wider application range.
The invention also locates the position with unfinished grounding in the grounding detection of the multi-sensor electronic scale by the display device, prompts the installation and the operator to adjust the height of the grounding point, and finally ensures the electronic scale to be horizontal and all the grounding points to be grounded and solid by combining with the electronic scale level indicating device, thereby ensuring the accurate and stable work of the electronic scale.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by 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.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (6)
1. A multi-sensor electronic scale landing detection system is characterized by being applied to an electronic scale, and comprising an electronic scale landing detection controller, a plurality of bidirectional multi-path electronic switches and an upper computer, wherein the number of the bidirectional multi-path electronic switches is consistent with that of sensors in the electronic scale; the public ends of the bidirectional multi-path electronic switches are respectively connected with the outgoing lines of the sensors, and the bidirectional switching ends are respectively connected with the electronic scale landing detection controller and the electronic scale junction box;
the bidirectional multi-path electronic switches correspond to a weighing mode in a first state, the sensors are all connected to the electronic scale junction box, and the sensors are disconnected with the electronic scale landing detection controller; the plurality of bidirectional multi-path electronic switches correspond to a grounding detection mode in a second state, the sensors are all connected to the electronic scale grounding detection controller, and the sensors are disconnected from the electronic scale junction box;
the electronic scale landing detection controller comprises a control unit and an AD conversion module connected with the control unit, wherein in a landing detection mode, an original AD value of a sensor signal is used as a calculation and comparison basis, and the AD conversion module converts analog signals of each sensor into digital AD values and transmits the digital AD values to the control unit;
the process of landing detection: and each corner of the electronic scale is loaded with a certain weight and is unloaded after being kept for a certain time, and whether each corner is stably landed or not is known.
2. The multi-sensor electronic scale landing detection system of claim 1, wherein the electronic scale landing detection controller further comprises a display module connected to the control unit for displaying the measured AD value of the sensor and the landing detection result.
3. The multi-sensor electronic scale landing detection system of claim 1, wherein the electronic scale landing detection controller further comprises a control switch connected to the control unit, the control unit controlling the bidirectional switching of the bidirectional multi-way electronic switch according to the state of the control switch to realize the switching between the weighing mode and the landing detection mode.
4. The multi-sensor electronic scale landing detection system of claim 1, wherein the upper computer is connected to the electronic scale landing detection controller; and the electronic scale landing detection controller sends the AD value of each sensor signal and the landing detection result to an upper computer in real time.
5. The multi-sensor electronic scale landing detection system of claim 4, wherein the upper computer is further capable of sending a switching instruction of the weighing mode and the landing detection mode to the electronic scale landing detection controller to realize switching between the two modes.
6. A landing detection method based on the multi-sensor electronic scale landing detection system of any one of claims 1 to 5, comprising the steps of:
(1) the electronic scale is horizontally placed, the no-load standing time exceeds a set threshold value, and the electronic scale is controlled to be switched from a weighing mode to a landing detection mode through an external switch or an upper computer;
(2) loading the weight meeting the set threshold range above any landing point of the electronic scale, and unloading after stabilizing the set time;
(3) the electronic scale lands and detects the controller and obtains every sensor signal in real time, detect appear meeting weight within the range of the threshold value and unload after the settling time exceeds the set time on the electronic scale, for the biggest change sensor of AD value measured, obtain the no-load AD value of the sensor before the weight is loaded, and the no-load AD value that the standing time exceeds the set threshold value after the weight is unloaded, compare the no-load AD value of two times, if the difference is smaller than the set threshold value, it is stable that the place lands, enter step (5); otherwise, judging that the corresponding landing place of the sensor is not in a real landing state, displaying the landing detection result through a display module and sending the landing detection result to an upper computer to remind the upper computer to adjust the landing place which is not in the real landing state, and entering the step (4);
(4) after the land is not actually touched, detecting the land again according to the steps (2) to (3);
(5) detecting the next landing place of the electronic scale until all the landing places of the electronic scale are stably landed;
(6) and after the grounding detection is finished, controlling the electronic scale to be switched from the grounding detection mode to the weighing mode through an external switch or an upper computer.
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