CN105588631B - Weigher fault test set, method, system and engineering machinery - Google Patents
Weigher fault test set, method, system and engineering machinery Download PDFInfo
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- CN105588631B CN105588631B CN201410565755.6A CN201410565755A CN105588631B CN 105588631 B CN105588631 B CN 105588631B CN 201410565755 A CN201410565755 A CN 201410565755A CN 105588631 B CN105588631 B CN 105588631B
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- weighing sensor
- weigher
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- weight induction
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Abstract
The invention discloses a kind of weigher fault test set, method, system and engineering machinery.The equipment includes：Weighing sensor, for exporting weight induction signal；Signal processing apparatus, for whether being broken down according to weighing sensor described in weight induction signal detection；The wherein described weight induction signal is sent to signal processing apparatus by independent channel.The failure that weighing sensor in weigher may be implemented in the present invention detects in real time, and it can accurately navigate to specific fault sensor position, the deficiency of sensor fault can not be judged by compensating for existing electronic scale, so as to reduce the difficulty of weigher troubleshooting and maintenance, the efficiency of troubleshooting is improved.
Description
Technical field
The present invention relates to metering fields, and in particular, to a kind of weigher fault test set, method, system and engineering
Machinery.
Background technology
Such as the engineering machinery of mixing plant usually requires weighing-appliance, such as weigher.The adult of weigher generally has
There are several weighing sensors, the analog signal of weighing sensor output to be exported always after sensor wire box carries out parallel connection
Analog signal is weighed, the controllers such as PLC are inputted using signal amplification and A/D conversions to generate digital signal, to complete
Metering process.Embodiment as replacement, it is convenient to omit terminal box and directly by weighing sensor export analog signal
It carries out in parallel.
Due in the prior art that the analog signal of weighing sensor output is in parallel, after controller can only handle parallel connection
Signal, even if total voltage signal that can be after output-parallel if in the case of certain weighing sensor cisco unity malfunctions, leads
Cause can not judge weighing sensor exception so that metric results are inaccurate, seriously affect the accuracy of concrete batching, cause
Finished product concrete quality accident.
In addition, even if field personnel rule of thumb judge can not be by existing if weighing sensor is abnormal
Weigher signal processing framework position the weighing sensor being abnormal, need field personnel seriatim to investigate, increase
The big difficulty and cost of overhaul of the equipments or later maintenance.
Invention content
The object of the present invention is to provide a kind of weigher fault test set, method, system and engineering machinery, with accurately fixed
The weighing sensor that position is broken down.
To achieve the goals above, the present invention provides a kind of weigher fault test set, which includes：Weighing and sensing
Device, for exporting weight induction signal；Signal processing apparatus, for being according to weighing sensor described in weight induction signal detection
It is no to break down；The wherein described weight induction signal is sent to signal processing apparatus by independent channel.
The present invention provides a kind of weigher fault detection method, this method includes：Sense weight, and export weight induction
Signal；Whether broken down according to weighing sensor described in weight induction signal detection；The wherein described weight induction signal passes through
Independent channel is sent.
The present invention provides a kind of weigher fault detection system, which includes that the weigher fault detect is set
It is standby；The system further includes：Amplifier, for amplifying weight induction signal；Analog-digital converter, for amplified weight induction
Signal carries out analog-to-digital conversion.
The present invention provides a kind of engineering machinery, which includes the weigher fault detection system.
The failure that weighing sensor in weigher may be implemented in the present invention detects in real time, and can accurately navigate to specific
Fault sensor position, the deficiency of sensor fault can not be judged by compensating for existing electronic scale, so as to reduce weigher
Troubleshooting and the difficulty of maintenance, improve the efficiency of troubleshooting.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Attached drawing is to be used to provide further understanding of the present invention, an and part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is weigher fault test set schematic diagram provided by the invention；
Fig. 2 is weigher fault detection method flow chart provided by the invention；
Fig. 3 is weigher fault detection system schematic diagram provided by the invention.
Reference sign
100 weighing sensor, 200 signal processing apparatus
300 amplifier, 400 A/D converter
Specific implementation mode
The specific implementation mode of the present invention is described in detail below in conjunction with attached drawing.It should be understood that this place is retouched
The specific implementation mode stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
In order to overcome the defects of the prior art, the weighing sensor of accurate discovery and positioning failure, the present invention provides
Weigher fault test set as shown in Figure 1.The weigher fault test set includes：Weighing sensor 100, for exporting
Weight induction signal；Signal processing apparatus 200, for event whether to occur according to weighing sensor described in weight induction signal detection
Barrier；The wherein described weight induction signal is sent to signal processing apparatus by independent channel.As described in the background section, existing
Have since a total inductive signal will be exported after weighing sensor parallel connection in technology, so as to cause that whether can not judge weigher
It can work normally, the weighing sensor 100 to break down can not be positioned.It is in the prior art in order to overcome in the present invention
The inductive signal of each weighing sensor 100 is independently sent to signal processing unit by defect by independent channel, to
It can judge whether weighing sensor 100 breaks down using the linear relationship between different weighing sensors 100, Yi Jiding
The weighing sensor 100 that position is broken down.
In order to determine whether break down, need to be known in advance by the linear relationship between weighing sensor 100
The weighing sensor of weigher does not have linear relationship in the event of failure.The linear relationship being known in advance can determine weigher without reason
It barrier and obtains under the premise of calibrating, such as the commodity newly bought or is placed on weigher with the object (such as counterweight) of known weight
Confirm weigher fault-free, then weight can be placed on weigher, such as the identical counterweight of several weight is uniform
Ground is placed on weigher, but to ensure that the weight F being placed on weigher is no more than the specified weighing value of weigher.It at this time can be with
Record the linear relationship between each weighing sensor.For example, the quantity of weigher is n, may exist Cn2 linear relationships,
Such asWherein i ≠ j, i=1,2 ..., n, j=1,2 ..., n, D2i、D2jRespectively load known weight
When weight i-th and j-th of weighing sensor output weight induction signal.Weight induction signal can be electric current or voltage-mode
Quasi- signal also can be the digital signal for being converted to electric current or voltage analog signal according to certain conversion proportion relationship.
The weight of unknown weight is placed on weigh on weigher when, can obtain between current each weighing sensor 100
Linear relationship, be denoted asWherein i ≠ j, i=1,2 ..., n, j=1,2 ..., n, D3i、D3jRespectively load
The weight induction signal of i-th of the weight of unknown weight and the output of j-th of weighing sensor.
After the linear relationship between obtaining current each weighing sensor, linear relationship can be calculated by following formula
Variable quantity：
Wherein i ≠ j, i=1,2 ..., n, j=1,2 ..., n, n are weighing sensor
Quantity,The known linear pass between i-th of weighing sensor output signal and j-th of weighing sensor output signal
System,The current linear relationship between i-th of weighing sensor output signal and j-th of weighing sensor output signal.
If ΔijMore than or equal to threshold value, then signal processing apparatus can be determined that the weight induction of weighing sensor output
Current linear relationship changes relative to known linear relationship between signal.
Further, in ΔijIn the set of composition, ΔijValue be equal to ΔjiValue, in the subset with identical i or j
In at least two elements be more than threshold value in the case of, then i-th of weighing sensor or j-th of weighing sensor break down,
Or in weighing sensor related at least two element in addition to i-th of weighing sensor or j-th of weighing sensor
Weighing sensor break down.
It is illustrated so that weigher has 3 weighing sensors as an example below, three weighing sensors are respectively the first title
Retransmit sensor, the second weighing sensor and third weighing sensor.
In the case where not loading weight on weigher, the weight of each weighing sensor under weigher sky scale state is recorded
Inductive signal D11、D12And D13；Several counterweights that total weight is F are loaded on weigher body, record each weight induction signal
D21、D22And D23.Preferably, F is evenly distributed on weigher.Preferably, F is the 80% of the specified variable of weigher.It will not
After knowing that the object of weight is loaded on weigher, the weight induction signal of each weighing sensor is D31、D32And D33.Under
Formula calculates the variable quantity of linear relationship：
In Δ12>=ε or Δ23>=ε or Δ13In the case of >=ε, then signal processing apparatus may determine that scale body senses
The linear of device has occurred that variation, signal processing apparatus can stop measuring either production procedure and by alarm lamp or
Man-machine interface is alarmed.Wherein ε is the threshold value of setting.
Further, signal processing apparatus can carry out positioning failure in the following manner：
If Δ12>=ε and Δ23>=ε then can determine that the linear of the second weighing sensor is changed or first weighs
Sensor and third weighing sensor linear while being changed；
If Δ23>=ε and Δ13>=ε then can determine that the linear of third weighing sensor is changed or first weighs
Sensor and the second weighing sensor linear while being changed；
If Δ12>=ε and Δ13>=ε then can determine that the linear of the first weighing sensor is changed or second weighs
Sensor and third weighing sensor linear while being changed.
In addition, signal processing apparatus can pass through the weight W for the object that following formula is currently loaded：
Although above formula is in the case of 3 weighing sensors, scale obtains the formula of weight of object, which can be with
It is generalized to the situation of n weighing sensor.
For the weigher with n weighing sensor, the object that can currently be recorded by following formula
Weight：
Wherein D1iThe weight induction signal of i-th of weighing sensor, D when not loading weight for weigher2iFor weigher plus
The weight induction signal of i-th of weighing sensor, D when loading capacity F3iI-th of weighing and sensing when currently loading weight for weigher
The weight induction signal of device, W are the weight of current load weight.
Correspondingly, the present invention provides a kind of weigher fault detection method, this method includes：Sense weight, and export
Weight induction signal；Whether broken down according to weighing sensor described in weight induction signal detection；The wherein described weight induction
Signal is sent by independent channel.In order to which this method is described in detail, Fig. 2 shows the weigher fault detection methods of the present invention
Flow chart.Can be with from the flow chart, after detection starts, the weight of detection object first, then according to each sensor it
Between linear relationship and known linear relationship be compared, judgement linear relationship whether changed.If linear relationship
Changed, then can be determined that weighing sensor failure, if linear relationship does not change, weighing sensor is normal.
Correspondingly, the present invention provides a kind of weigher fault detection system, which includes weighing sensor 100, puts
Big device 300, A/D converter 400 and signal processing apparatus 200.As previously mentioned, the signal of weighing sensor needs in the present invention
Signal processing apparatus (such as microcontroller, digital signal processing chip etc.) is sent to by independent channel, it can be with needle
One independent channel is arranged to each weighing sensor, i.e., each weighing sensor corresponds to an amplifier and a mould respectively
Number converter.Alternatively, it is possible to successively come out the weight induction signal acquisition of weighing sensor by way of poll, and
It is sent to shared amplifier and analog-digital converter, to which weight induction signal is sent to signal processing module.In addition to above-mentioned
Except the mode for realizing autonomous channel, also other realization methods, details are not described herein.Those skilled in the art will be seen that
Amplifier can be used for amplifying weight induction signal, and A/D converter can be used for carrying out amplified weight induction signal
Analog-to-digital conversion.
Correspondingly, the present invention provides a kind of engineering machinery, which includes the weigher fault detect system
System.
The preferred embodiment of the present invention is described in detail above in association with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical scheme of the present invention
Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (12)
1. a kind of weigher fault test set, which is characterized in that the equipment includes：
Weighing sensor, for exporting weight induction signal；
Signal processing apparatus, for whether being broken down according to weighing sensor described in weight induction signal detection；
The wherein described weight induction signal is sent to signal processing apparatus by independent channel,
The signal processing apparatus is used for linear relationship current between the weight induction signal that different weighing sensors export
In the case of changing relative to known linear relationship, judgement weighing sensor breaks down, in different weighing sensors
In the case that linear relationship between the weight induction signal of output does not change relative to known linear relationship, judgement claims
Sensor is retransmitted not break down.
2. weigher fault test set according to claim 1, which is characterized in that the signal processing apparatus is under
Formula calculates current linear relationship between the weight induction signal of different weighing sensors output relative to known linear relationship
Variable quantity：
Wherein i ≠ j, i=1,2 ..., n, j=1,2 ..., n, n are the number of weighing sensor
Amount,For the weight induction signal of the weight induction signal and the output of j-th of weighing sensor of i-th of weighing sensor output
Between known linear relationship,It is defeated for the weight induction signal and j-th of weighing sensor of i-th of weighing sensor output
Current linear relationship between the weight induction signal gone out；
The signal processing apparatus is additionally operable in ΔijIn the case of more than or equal to threshold value, different weighing sensor outputs are judged
Weight induction signal between current linear relationship change relative to known linear relationship.
3. weigher fault test set according to claim 2, which is characterized in that in ΔijIn the set of composition, having
In the case of thering are at least two elements in the subset of identical i or j to be all higher than threshold value, then i-th of weighing sensor or j-th title
Weight sensor failure, or i-th of weighing sensor or jth are removed in weighing sensor related at least two element
Weighing sensor except a weighing sensor breaks down.
4. weigher fault test set according to claim 3, which is characterized in that n is equal to 3；
The signal processing apparatus, is additionally operable in Δ12And Δ23In the case of being all higher than threshold value, the 2nd weighing sensor hair is judged
Raw failure or the 1st weighing sensor and the 3rd weighing sensor break down；In Δ12And Δ13It is all higher than threshold value
In the case of, the 1st weighing sensor of judgement breaks down or the 2nd weighing sensor and the 3rd weighing sensor occur
Failure；In Δ23And Δ13In the case of being all higher than threshold value, the 3rd weighing sensor of judgement breaks down or the 1st is weighed
Sensor and the 2nd weighing sensor break down.
5. according to the weigher fault test set described in claim 2-4 any one, which is characterized in that the signal processing
Device is additionally operable to weigh according to the following formula：
Wherein D1iThe weight induction signal of i-th of weighing sensor, D when not loading weight for weigher2iWeight is loaded for weigher
The weight induction signal of i-th of weighing sensor, D when measuring F3iI-th weighing sensor when currently loading weight for weigher
Weight induction signal, W are the weight of current load weight.
6. a kind of weigher fault detection method, which is characterized in that this method includes：
Sense weight, and export weight induction signal；
Whether broken down according to weight induction signal detection weighing sensor；
The wherein described weight induction signal is sent by independent channel,
It is described according to weight induction signal detection weighing sensor whether break down including：
Current linear relationship is relative to known linear relationship between the weight induction signal of different weighing sensors output
In the case of changing, judgement weighing sensor break down, different weighing sensors output weight induction signal it
Between linear relationship do not change relative to known linear relationship in the case of, judgement weighing sensor do not break down.
7. weigher fault detection method according to claim 6, which is characterized in that this method further includes：According to the following formula
Current linear relationship between the weight induction signal of different weighing sensors output is calculated relative to known linear relationship
Variable quantity：
Wherein i ≠ j, i=1,2 ..., n, j=1,2 ..., n, n are the number of weighing sensor
Amount,For the weight induction signal of the weight induction signal and the output of j-th of weighing sensor of i-th of weighing sensor output
Between known linear relationship,It is defeated for the weight induction signal and j-th of weighing sensor of i-th of weighing sensor output
Current linear relationship between the weight induction signal gone out；
This method further includes：In ΔijIn the case of more than or equal to threshold value, the weight induction of different weighing sensor outputs is judged
Current linear relationship changes relative to known linear relationship between signal.
8. weigher fault detection method according to claim 7, which is characterized in that in ΔijIn the set of composition, having
In the case of thering are at least two elements in the subset of identical i or j to be all higher than threshold value, then i-th of weighing sensor or j-th title
Weight sensor failure, or i-th of weighing sensor or jth are removed in weighing sensor related at least two element
Weighing sensor except a weighing sensor breaks down.
9. weigher fault detection method according to claim 8, which is characterized in that n is equal to 3；
This method further includes：In Δ12And Δ23In the case of being all higher than threshold value, the 2nd weighing sensor of judgement breaks down, or
The 1st weighing sensor of person and the 3rd weighing sensor break down；In Δ12And Δ13In the case of being all higher than threshold value, sentence
Fixed 1st weighing sensor breaks down or the 2nd weighing sensor and the 3rd weighing and sensing break down；In Δ23
And Δ13In the case of being all higher than threshold value, the 3rd weighing sensor of judgement breaks down or the 1st weighing sensor and the 2nd
A weighing sensor breaks down.
10. according to the weigher fault detection method described in claim 7-9 any one, which is characterized in that this method is also wrapped
It includes and weighs according to the following formula：
Wherein D1iThe weight induction signal of i-th of weighing sensor, D when not loading weight for weigher2iWeight is loaded for weigher
The weight induction signal of i-th of weighing sensor, D when measuring F3iI-th weighing sensor when currently loading weight for weigher
Weight induction signal, W are the weight of current load weight.
11. a kind of weigher fault detection system, which is characterized in that the system includes according to claim 1-5 any one institute
The weigher fault test set stated；The system further includes：
Amplifier, for amplifying weight induction signal；
Analog-digital converter, for carrying out analog-to-digital conversion to amplified weight induction signal.
12. a kind of engineering machinery, which is characterized in that the engineering machinery includes weigher failure inspection according to claim 11
Examining system.
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107607189A (en) * | 2017-10-18 | 2018-01-19 | 江苏永钢集团有限公司 | A kind of weighing sensor failure detector |
| CN109165962B (en) * | 2018-09-14 | 2019-10-22 | 郑称德 | The data transfer control method and agricultural trade system of agricultural trade system based on e-commerce |
| CN110319914A (en) * | 2019-06-06 | 2019-10-11 | 吉旗（成都）科技有限公司 | The fault detection method and device of vehicle load detection device |
| CN113834558A (en) * | 2020-06-24 | 2021-12-24 | 宝山钢铁股份有限公司 | Remote fault detection method for steel ladle weighing sensor |
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| CN200965478Y (en) * | 2006-08-11 | 2007-10-24 | 陈廷会 | Electronic table scale with fault detection functions |
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