CN106569128B - Detection method and device - Google Patents
Detection method and device Download PDFInfo
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- CN106569128B CN106569128B CN201610958924.1A CN201610958924A CN106569128B CN 106569128 B CN106569128 B CN 106569128B CN 201610958924 A CN201610958924 A CN 201610958924A CN 106569128 B CN106569128 B CN 106569128B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
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- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The embodiment of the invention provides a detection method and a detection device. On one hand, the embodiment of the invention obtains the current resistance value of the relay; therefore, whether the relay is damaged or not is judged according to the resistance value. According to the principle, whether the relay is damaged or not is judged by detecting the resistance value, so that the problem that the relay cannot be detected when the relay is damaged in the prior art is solved.
Description
[technical field]
The present invention relates to relay test technical field more particularly to a kind of detection method and devices.
[background technique]
Relay is widely used in various industries at present, such as remote control, telemetering, communication, automatic control, electromechanical integration and
In power electronic equipment.The working environment of relay is generally hyperbaric environment, therefore, can be often subject to impact or the warp of high current
It is often in overload, relay may be damaged at this time, and when relay damages, which then can not be normal
Work, such as: the side contact as caused by the unilateral adhesion of contact can not separate, so that the side of relay is in normally closed shape
State；Alternatively, can not be connected as caused by pitting of contact when relay is closed, so that relay loses its switching function etc..But
It is that there is no detection relays the effective means damaged whether occurs in the prior art.
In realizing process of the present invention, at least there are the following problems in the prior art for inventor's discovery:
In the prior art, when relay damages, damage detection can not be carried out to relay.It is badly in need of a kind of detection
Mode carries out the needs of damaging detection to relay to meet.
[summary of the invention]
In view of this, the embodiment of the invention provides a kind of detection method and device, to solve in the prior art, when after
When electric appliance damages, the problem of damage detects can not be carried out to relay.
In a first aspect, the embodiment of the invention provides a kind of detection methods, which comprises
Detect the voltage value between the anode and cathode of the relay；
The current value that detection passes through the electric current of the relay；
The ratio for obtaining the voltage value Yu the current value, the resistance value current as the relay；
According to the resistance value, judge whether the relay damages；
Voltage value between the anode and cathode of the detection relay, comprising:
Acquire first voltage signal；
The isolation processing that high-voltage signal is carried out to the first voltage signal, obtains the low pressure in the first voltage signal
Signal；
The low-voltage signal is converted into d. c. voltage signal；
The interference signal in the d. c. voltage signal is removed, second voltage signal is obtained；
According to the second voltage signal, the voltage value is detected；
The current value that the detection passes through the electric current of the relay, comprising:
Acquire the first current signal；
First current signal is converted into DC current signal；
The interference signal in the DC current signal is removed, the second current signal is obtained；
According to second current signal, the current value is detected.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the damage is extremely
Less include following one kind: unilateral adhesion, pitting of contact, arcing and contact resistance increase.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, it is described according to institute
Resistance value is stated, judges whether the relay damages, comprising:
Judge whether the resistance value is greater than specified resistance value；
It is greater than the specified resistance value in response to the resistance value, determines that the relay damages；
It is less than or equal to the specified resistance value in response to the resistance value, determines that the relay does not damage.
A technical solution in above-mentioned technical proposal has the following beneficial effects:
In embodiments of the present invention, by obtaining the current resistance value of relay, and according to the resistance value, described in judgement
Whether relay damages, and since relay is when damaging, the resistance value of the relay will appear exception, according to this
Principle judges whether relay damages by detection resistance value in embodiments of the present invention, solves the prior art
In, when relay damages, the problem of damage detects can not be carried out to relay.
Second aspect, the embodiment of the invention provides a kind of detection device, described device includes:
Acquisition unit, for obtaining the current resistance value of relay；
Detection unit, for judging whether the relay damages according to the resistance value；
The acquisition unit, is specifically used for:
Detect the voltage value between the anode and cathode of the relay；
The current value that detection passes through the electric current of the relay；
The ratio for obtaining the voltage value Yu the current value, as the resistance value；
When the acquisition unit is used to detect the voltage value between the anode and cathode of the relay, it is specifically used for:
Acquire first voltage signal；
The isolation processing that high-voltage signal is carried out to the first voltage signal, obtains the low pressure in the first voltage signal
Signal；
The low-voltage signal is converted into d. c. voltage signal；
The interference signal in the d. c. voltage signal is removed, second voltage signal is obtained；
According to the second voltage signal, the voltage value is detected；
When the acquisition unit is used to detect the current value by the electric current of the relay, it is specifically used for:
Acquire the first current signal；
First current signal is converted into DC current signal；
The interference signal in the DC current signal is removed, the second current signal is obtained；
According to second current signal, the current value is detected.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the damage is extremely
Less include following one kind: unilateral adhesion, pitting of contact, arcing and contact resistance increase.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the detection are single
Member is specifically used for:
Judge whether the resistance value is greater than specified resistance value；
It is greater than the specified resistance value in response to the resistance value, determines that the relay damages；
It is less than or equal to the specified resistance value in response to the resistance value, determines that the relay does not damage.
A technical solution in above-mentioned technical proposal has the following beneficial effects:
Since relay is when damaging, the resistance value of the relay will appear exception, according to this principle, in this hair
In bright embodiment, judge whether relay damages by detection resistance value, solves in the prior art, when relay goes out
When now damaging, the problem of damage detects can not be carried out to relay.
[Detailed description of the invention]
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this field
For those of ordinary skill, without any creative labor, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is a kind of flow diagram of detection method provided by the embodiment of the present invention；
Fig. 2 is a kind of flow diagram of the specific implementation for step 101 provided by the embodiment of the present invention；
Fig. 3 is a kind of flow diagram of the specific implementation for step 201 provided by the embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram for the detection circuit for detecting relay voltage value provided by the embodiment of the present invention；
Fig. 5 is a kind of flow diagram of the specific implementation for step 202 provided by the embodiment of the present invention；
Fig. 6 is a kind of structural schematic diagram for the detection circuit for detecting relay current value provided by the embodiment of the present invention；
Fig. 7 is a kind of structural schematic diagram of detection device provided by the embodiment of the present invention.
[specific embodiment]
For a better understanding of the technical solution of the present invention, being retouched in detail to the embodiment of the present invention with reference to the accompanying drawing
It states.
It will be appreciated that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
It will be appreciated that though in embodiments of the present invention voltage signal and electricity may be described using term first, second
Signal is flowed, but these voltage signals and current signal should not necessarily be limited by these terms.These terms are only used to voltage signal and electricity
Stream signal is distinguished from each other out.For example, first voltage signal can also be claimed in the case where not departing from range of embodiment of the invention
For second voltage signal, similarly, second voltage signal can also be referred to as first voltage signal.
Depending on context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determination " or " in response to detection ".Similarly, depend on context, phrase " if it is determined that " or " if detection
(condition or event of statement) " can be construed to " when determining " or " in response to determination " or " when the detection (condition of statement
Or event) when " or " in response to detection (condition or event of statement) ".
Embodiment one
The embodiment of the present invention provides a kind of detection method, referring to FIG. 1, it is method provided by the embodiment of the present invention
Flow diagram, as shown in Figure 1, method includes the following steps:
101, the current resistance value of relay is obtained.
Specifically, the resistance value of the relay will appear exception when relay damages, therefore, it is necessary to by obtaining
The resistance value that relay is current is taken, to judge whether the relay exception occurs.
Further, when relay work in hyperbaric environment when, can be often subject to high current impact or often in
Overload, at this point, the reason of meeting is because of high current or overload between the contact of relay, leads to the unilateral viscous of contact occur
The phenomenon that company, pitting of contact, arcing and contact resistance increase.
For example, when relay is under high current environment, due to generation high temperature and slider material the problem of, cause
Occurs adhesion between the contact of side, i.e., unilateral adhesion occurs the adhesion survey contact at this time and is then in normally off.
In another example because steeply rising the temperature of contact surface when relay is in overload for a long time, causing to touch
Point ablation, at this point, the surface of contact will receive destruction, so that relay can not be connected in closure, i.e., so that relay is lost
Its function of switching.
In another example that is, relay is switched to off-state by closed state when the two sides contact of relay is separated,
If electric current is larger at this time, and when separating action is slower, relay is made to generate phenomenon of arc discharge, at this time the insulating materials meeting of relay
It is destroyed, so that relay is in the state of naked.
In another example when being under high current or overload for a long time due to relay, so that the conduction of contact surface
Characteristic changes, and then the contact resistance of contact is caused to increase, so that contact can not carry out normal electrical conduction.
Above-mentioned phenomenon will lead to relay and damage, and impact to the normal use of relay.Also, above-mentioned damage
The bad resistance value that can make relay occurs abnormal.
102, according to the resistance value, judge whether the relay damages.
Specifically, judging whether relay damages by resistance value, not only judgment mode is fairly simple, also,
Since when above-mentioned damage occurs in relay, the resistance value of relay will appear exception, therefore, pass through the electricity of current relay
Resistance value can intuitively reflect whether the relay above-mentioned damage occurs, so judgment mode is more effective, so that judgement knot
Fruit is more accurate.
It is in a specific embodiment, described to judge whether the relay damages according to the resistance value,
Include:
Judge whether the resistance value is greater than specified resistance value；
It is greater than the specified resistance value in response to the resistance value, determines that the relay damages；
It is not more than the specified resistance value in response to the resistance value, determines that the relay does not damage.
Specifically, the specified resistance value is relay resistance value under normal condition, can obtain based on experience value
, and can pre-set.When there is above-mentioned damaged condition, the resistance value of relay can be greater than specified resistance value, because
This, can be by judging whether current resistance value is greater than specified resistance value, to judge whether relay above situation occurs
Damage.
Since relay is when damaging, the resistance value of the relay will appear exception, according to this principle, in this hair
In bright embodiment, judge whether relay damages by detection resistance value, solves in the prior art, when relay goes out
When now damaging, the problem of damage detects can not be carried out to relay.
Embodiment two
The embodiment of the invention provides a kind of specific implementations for step 101, specifically as shown in Fig. 2, this method
The following steps are included:
201, the voltage value between the anode and cathode of the relay is detected.
202, the current value that detection passes through the electric current of the relay.
203, the ratio for obtaining the voltage value and the current value, as the resistance value.
Wherein, the current value and the voltage value are the current value and voltage value of synchronization, to guarantee the electricity obtained
The accuracy of resistance value, and then ensure that whether the relay judged the accuracy for the result damaged occurs.
Embodiment three
The embodiment of the invention provides a kind of specific implementations for step 201, specifically as shown in figure 3, the side
Method the following steps are included:
301, first voltage signal is acquired.
In a specific embodiment, if relay work is in battery system, the anode of battery is with relay
Anode connection, then the electric current of the conducting wire of anode, cathode voltage and battery exports namely battery from the cathode of relay
Anode is connected to the upstream device of relay by the cathode of relay, since there are resistance for relay, anode can be made electric
It is pressed in one pressure drop of generation in relay, which is the operating voltage (belonging to low pressure) of relay, and is formed and pass through relay
Electric current, the electric current be relay operating current.When the voltage signal of the Acquisition Circuit acquisition relay of voltage signal, acquisition
Circuit requires connect to relay positive terminal and negative terminal, and the anode of the Acquisition Circuit and battery is also connected at this time, and
And the anode of battery is generating pressure drop after relay, the then battery cathode that cathode voltage passes through relay after pressure drop
Column export, therefore, when acquiring the voltage signal of relay, the voltage signal of acquisition includes the operating voltage signal of relay
The cathode voltage signal of (low-voltage signal) and battery, since the voltage of battery belongs to high pressure, the voltage signal of battery is height
Press signal.
By taking battery system is located at electric car as an example, when the battery system operation is in electric car, in electric car
It after braking process, backwashes to the energy for generating electric car in braking process into battery, will form one at this time instead
To voltage (belonging to high pressure), and generate pressure drop when by relay, which is also the operating voltage of relay, and is formed
By the electric current of relay, when direction of voltage and current and voltage and current mentioned above at this time, is antipodal, and
And it also can be collected circuit and collect, therefore collected voltage signal is opposite with the direction of voltage signal mentioned above
's.
After Acquisition Circuit collects above-mentioned four kinds of voltage, the waveform which forms belongs to the wave of alternating voltage
Shape, therefore, collected first voltage signal are ac voltage signal.
302, the isolation processing that high-voltage signal is carried out to the first voltage signal, obtains in the first voltage signal
Low-voltage signal.
Specifically, due to the voltage signal that the voltage signal for needing to use is relay, and the voltage signal of relay is
Low-voltage signal, it is therefore desirable to carry out the isolation processing of high-voltage signal, to first voltage signal to guarantee the voltage signal obtained all
For the voltage signal of relay, when first voltage signal is isolated, what is isolated out is the voltage signal and energy of battery
The voltage signal to backwash, i.e., positive high-voltage signal and negative sense high-voltage signal in first voltage signal, the electricity remained at this time
Pressure signal includes that the voltage signal for the pressure drop that anode is generated when passing through relay and energy backwash when by relay
The voltage signal of the pressure drop of generation, i.e., positive low-voltage signal and negative sense low-voltage signal in first voltage signal.
It in a specific embodiment, can be by isolation circuit to progress high-voltage signal in first voltage signal
Isolation processing.
303, the low-voltage signal is converted into d. c. voltage signal.
Specifically, the voltage value used is DC voltage value, therefore when obtaining resistance value by voltage value and current value
It needs to be converted to low-voltage signal d. c. voltage signal, and then DC voltage value can be obtained according to d. c. voltage signal.
In a specific embodiment, low-voltage signal is converted to by d. c. voltage signal by rectification circuit.
304, the interference signal in the d. c. voltage signal is removed, second voltage signal is obtained.
Specifically, further comprise interference signal due in collected first voltage signal, and in interference signal there is also
In low-voltage signal, therefore is also contained in the d. c. voltage signal obtained by the above method and belong to the straight of low pressure interference signal
Signal is flowed, in order to guarantee the accuracy of the voltage value obtained, it is therefore desirable to which removal is believed by DC voltage obtained by the above method
Interference signal in number.
In a specific embodiment, when removing the interference signal in d. c. voltage signal, filtering can be passed through
Circuit is removed.
305, according to the second voltage signal, the voltage value is detected.
Specifically, when obtaining resistance value according to voltage value, in order to guarantee the accuracy of the resistance value obtained, the electricity used
Pressure value should be the voltage value that voltage is under stable state, therefore after obtaining second voltage signal, according to the second of acquisition
Voltage signal judges all voltage values under stable state, it may be assumed that in specified duration, the fluctuation range of voltage value is small
In all voltage values of given voltage threshold value.
Then, the voltage value for needing to use is obtained in all voltages obtained above.
For example, since collected first voltage signal has temporal precedence relationship, obtained second voltage
Signal also has temporal precedence relationship, that is, the voltage value detected also has temporal precedence relationship.Therefore, described to obtain
The voltage value obtained can be the voltage value that intermediate time is in all voltage values, as between the anode and cathode of relay
Voltage value.
In another example after obtaining above-mentioned all voltage values the equal of all voltage values can be obtained according to all voltage values
Value, as the voltage value between the anode and cathode of relay.
In another example a voltage value can be randomly selected in all voltage values after obtaining above-mentioned all voltage values, make
For the voltage value between the anode and cathode of relay.
In a specific embodiment, can by single-chip microprocessor MCU (M i crocontro l l er Un i t,
Micro-control unit) detect voltage value.
In a specific embodiment, relay work is specific as shown in figure 4, detection relay in battery system
The detection circuit of voltage value between the positive terminal and negative terminal of device includes: that voltage sampling circuit, voltage isolation circuit, voltage are whole
Current circuit, voltage filtering circuit and MCU, wherein the positive and negative anodes of the input terminal of voltage sampling circuit respectively with relay just
Pole is connected with negative terminal, and the output end of the voltage sampling circuit is isolated from voltage circuit input end connection；Voltage isolation circuit
Input terminal and voltage rectifying circuit input terminal connect；The output end of voltage rectifying circuit and the input terminal of voltage filtering circuit
Connection；The input terminal of voltage filtering circuit is connect with MCU.
When voltage value between anode and cathode of the detection circuit to relay detects, comprising the following steps:
1, voltage sampling circuit collects first voltage signal by its input terminal.
2, first voltage signal is sent to the input terminal of voltage isolation circuit by its output end by voltage sampling circuit.
3, voltage isolation circuit carries out the isolation processing of high voltage signal to first voltage signal, obtains first voltage signal
In low-voltage signal.
4, the low-voltage signal is sent to the input terminal of voltage rectifying circuit by its output end by voltage isolation circuit.
5. the low-voltage signal is converted to d. c. voltage signal by voltage rectifying circuit.
6, the d. c. voltage signal is sent to the input terminal of voltage filtering circuit by its output end by voltage rectifying circuit.
7, voltage filtering circuit removes the interference signal in the d. c. voltage signal, obtains second voltage signal.
8, the second voltage signal is sent MCU by its output end by voltage filtering circuit.
9, MCU detects in specified duration that the fluctuation range of voltage value is less than specified electricity according to the second voltage signal
All voltage values of pressure threshold value obtain the voltage value between the anode of relay and cathode then according to all voltage values.
Example IV
Embodiment provides a kind of specific implementation for step 202, it is specific as shown in figure 5, the method includes
Following steps:
501, the first current signal is acquired.
Specifically, when acquiring the first current signal, the of relay can be acquired by the Acquisition Circuit of current signal
One current signal, and with collected first voltage signal reason having the same, collected first current information be hand over
Flow current signal.
502, first current signal is converted into DC current signal.
Specifically, the current value used is DC current values, therefore when obtaining resistance value by voltage value and current value
It needs to be converted to the first current signal DC current signal, and then DC current values can be obtained according to DC current signal.
In a specific embodiment, first current signal is converted to by DC current letter by rectification circuit
Number.
503, the interference signal in the DC current signal is removed, the second current signal is obtained.
Specifically, interference signal is contained due in collected first current signal, in order to guarantee the current value obtained
Accuracy, it is therefore desirable to removal pass through the interference signal in DC current signal obtained by the above method.
In a specific embodiment, when removing the interference signal in DC current signal, filtering can be passed through
Circuit is removed.
504, according to second current signal, the current value is detected.
Specifically, when obtaining resistance value according to current value, in order to guarantee the accuracy of the resistance value obtained, the electricity used
Flow valuve should be the current value that electric current is under stable state, therefore after obtaining the second current signal, according to the second of acquisition
Current signal judges all current values under stable state, it may be assumed that in specified duration, the fluctuation range of current value is small
In all current values of specified current flow threshold value.
Then, the current value for needing to use is obtained in all electric currents obtained above.
For example, since collected first current signal has temporal precedence relationship, the second obtained electric current
Signal also has temporal precedence relationship, that is, the current value detected also has temporal precedence relationship.Therefore, acquisition
Current value can be the current value that intermediate time is in all current values, the current value as relay.
In another example after obtaining above-mentioned all current values the equal of all current values can be obtained according to all current values
Value, the current value as relay.
In another example a current value can be randomly selected in all current values after obtaining above-mentioned all current values, make
For the current value of relay.
In a specific embodiment, current value can be detected by single-chip microprocessor MCU.
In a specific embodiment, relay work is specific as shown in fig. 6, detection relay in battery system
The detection circuit of the current value of device includes: current sampling circuit, current rectification circuit, current filtering circuit and MCU, wherein
The input terminal of current sampling circuit is connect with relay, the output end of the current sampling circuit and the input terminal of current rectification circuit
Connection；The output end of current rectification circuit is connect with the input terminal of current filtering circuit；The input terminal and MCU of current filtering circuit
Connection.
When current value of the detection circuit to relay detects, comprising the following steps:
1, current sampling circuit collects the first current signal by its input terminal.
2, the first current signal is sent to the input terminal of current rectification circuit by its output end by current sampling circuit.
3. first current signal is converted to DC current signal by current rectification circuit.
4, the DC current signal is sent to the input terminal of current filtering circuit by its output end by current rectification circuit.
5, current filtering circuit removes the interference signal in the DC current signal, obtains the second current signal.
6, second current signal is sent MCU by its output end by current filtering circuit.
7, MCU detects in specified duration that the fluctuation range of current value is less than specified electricity according to second current signal
All current values of stream threshold value obtain the current value of relay then according to all current values.
The embodiment of the present invention, which further provides, realizes the Installation practice of each step and method in above method embodiment.
Embodiment five
Referring to FIG. 7, it is a kind of structural schematic diagram of detection device provided by the embodiment of the present invention.The device packet
It includes:
Acquisition unit 71, for obtaining the current resistance value of relay；
Detection unit 72, for judging whether the relay damages according to the resistance value.
In a specific embodiment, the damage includes at least following one kind: unilateral adhesion, pitting of contact, drawing
Arc and contact resistance increase.
In a specific embodiment, the acquisition unit 71, is specifically used for:
Detect the voltage value between the anode and cathode of the relay；
The current value that detection passes through the electric current of the relay；
The ratio for obtaining the voltage value Yu the current value, as the resistance value.
In a specific embodiment, the detection unit 72, is specifically used for:
Judge whether the resistance value is greater than specified resistance value；
It is greater than the specified resistance value in response to the resistance value, determines that the relay damages；
It is less than or equal to the specified resistance value in response to the resistance value, determines that the relay does not damage.
In a specific embodiment, the acquisition unit 71 be used for detect the relay anode and cathode it
Between voltage value when, be specifically used for:
Acquire first voltage signal；
The isolation processing that high-voltage signal is carried out to the first voltage signal, obtains the low pressure in the first voltage signal
Signal；
The low-voltage signal is converted into d. c. voltage signal；
The interference signal in the d. c. voltage signal is removed, second voltage signal is obtained；
According to the second voltage signal, the voltage value is detected.
In a specific embodiment, the acquisition unit 71 is used to detect the electricity of the electric current by the relay
When flow valuve, it is specifically used for:
Acquire the first current signal；
First current signal is converted into DC current signal；
The interference signal in the DC current signal is removed, the second current signal is obtained；
According to second current signal, the current value is detected.
Embodiment one, embodiment two, embodiment three and example IV institute are able to carry out by each unit in this present embodiment
The method shown, the part that the present embodiment is not described in detail can refer to embodiment one, embodiment two, embodiment three and example IV
Related description, wherein acquisition unit 71 correspond to obtain voltage value during voltage sampling circuit, voltage isolation electricity
Road, voltage rectifying circuit, voltage filtering circuit and micro-control unit, and corresponding to obtain current value during electric current adopt
Sample circuit, current rectification circuit, current filtering circuit and micro-control unit, and the micro-control unit during acquisition voltage value
It can be a micro-control unit with the micro-control unit during acquisition current value, it is above-mentioned that detection unit 72 corresponds to acquisition
The micro-control unit mentioned.
In embodiments of the present invention, by obtaining the current resistance value of relay, and according to the resistance value, described in judgement
Whether relay damages, and since relay is when damaging, the resistance value of the relay will appear exception, according to this
Principle judges whether relay damages by detection resistance value in embodiments of the present invention, solves the prior art
In, when relay damages, the problem of damage detects can not be carried out to relay.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided by the present invention, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or group
Part can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown
Or the mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, device or unit it is indirect
Coupling or communication connection can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of hardware adds SFU software functional unit.
The above-mentioned integrated unit being realized in the form of SFU software functional unit can store and computer-readable deposit at one
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are used so that a computer
It is each that device (can be personal computer, server or network equipment etc.) or processor (Processor) execute the present invention
The part steps of embodiment the method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (Read-
Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic or disk etc. it is various
It can store the medium of program code.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (6)
1. a kind of detection method, which is characterized in that the described method includes:
Detect the voltage value between the anode and cathode of relay；
The current value that detection passes through the electric current of relay；
The ratio for obtaining the voltage value Yu the current value, the resistance value current as the relay, wherein the electric current
Value and the voltage value are the current value and voltage value of synchronization；
According to the resistance value, judge whether the relay damages；
Voltage value between the anode and cathode of the detection relay, comprising:
Acquire first voltage signal；
The isolation processing that high-voltage signal is carried out to the first voltage signal obtains the low pressure letter in the first voltage signal
Number；
The low-voltage signal is converted into d. c. voltage signal；
The interference signal in the d. c. voltage signal is removed, second voltage signal is obtained；
According to the second voltage signal, judge in specified duration, the fluctuation range of voltage value is less than given voltage threshold value
All voltage values, obtained in obtained all voltage values and need the voltage value used, as the relay anode and
Voltage value between cathode；
The current value that the detection passes through the electric current of the relay, comprising:
Acquire the first current signal；
First current signal is converted into DC current signal；
The interference signal in the DC current signal is removed, the second current signal is obtained；
According to second current signal, judge in specified duration, the fluctuation range of current value is less than specified current flow threshold value
All current values, obtained in obtained all current values and need the current value used, as the electricity for passing through the relay
The current value of stream.
2. the method as described in claim 1, which is characterized in that the damage includes at least following one kind: unilateral adhesion, contact
Ablation, arcing and contact resistance increase.
3. the method as described in claim 1, which is characterized in that it is described according to the resistance value, whether judge the relay
It damages, comprising:
Judge whether the resistance value is greater than specified resistance value；
It is greater than the specified resistance value in response to the resistance value, determines that the relay damages；
It is less than or equal to the specified resistance value in response to the resistance value, determines that the relay does not damage.
4. a kind of detection device, which is characterized in that described device includes:
Acquisition unit, for obtaining the current resistance value of relay；
Detection unit, for judging whether the relay damages according to the resistance value；
The acquisition unit, is specifically used for:
Detect the voltage value between the anode and cathode of the relay；
The current value that detection passes through the electric current of the relay；
The ratio for obtaining the voltage value Yu the current value, as the resistance value, wherein the current value and the voltage
Value is the current value and voltage value of synchronization；
When the acquisition unit is used to detect the voltage value between the anode and cathode of the relay, it is specifically used for:
Acquire first voltage signal；
The isolation processing that high-voltage signal is carried out to the first voltage signal obtains the low pressure letter in the first voltage signal
Number；
The low-voltage signal is converted into d. c. voltage signal；
The interference signal in the d. c. voltage signal is removed, second voltage signal is obtained；
According to the second voltage signal, judge in specified duration, the fluctuation range of voltage value is less than given voltage threshold value
All voltage values, obtained in obtained all voltage values and need the voltage value used, as the relay anode and
Voltage value between cathode；
When the acquisition unit is used to detect the current value by the electric current of the relay, it is specifically used for:
Acquire the first current signal；
First current signal is converted into DC current signal；
The interference signal in the DC current signal is removed, the second current signal is obtained；
According to second current signal, judge in specified duration, the fluctuation range of current value is less than specified current flow threshold value
All current values, obtained in obtained all current values and need the current value used, as the electricity for passing through the relay
The current value of stream.
5. device as claimed in claim 4, which is characterized in that the damage includes at least following one kind: unilateral adhesion, contact
Ablation, arcing and contact resistance increase.
6. device as claimed in claim 4, which is characterized in that the detection unit is specifically used for:
Judge whether the resistance value is greater than specified resistance value；
It is greater than the specified resistance value in response to the resistance value, determines that the relay damages；
It is less than or equal to the specified resistance value in response to the resistance value, determines that the relay does not damage.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610958924.1A CN106569128B (en) | 2016-11-03 | 2016-11-03 | Detection method and device |
| PCT/CN2017/093060 WO2018082339A1 (en) | 2016-11-03 | 2017-07-15 | Detection method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610958924.1A CN106569128B (en) | 2016-11-03 | 2016-11-03 | Detection method and device |
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| CN106569128A CN106569128A (en) | 2017-04-19 |
| CN106569128B true CN106569128B (en) | 2019-07-30 |
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| WO (1) | WO2018082339A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106569128B (en) * | 2016-11-03 | 2019-07-30 | 宁德时代新能源科技股份有限公司 | Detection method and device |
| CN108556627B (en) * | 2018-05-21 | 2024-05-07 | 北京豆牙科技有限公司 | Automobile intelligent accelerator control system capable of preventing mistaken stepping on accelerator |
| CN108445386A (en) * | 2018-05-24 | 2018-08-24 | 顺科新能源技术股份有限公司 | A kind of electric vehicle power relay fault detection system and its method |
| CN110456265A (en) * | 2019-08-16 | 2019-11-15 | 武汉合康智能电气有限公司 | The detection method of relay in a kind of charging pile |
| CN113406486B (en) * | 2020-03-17 | 2024-05-24 | 上海汽车集团股份有限公司 | Relay detection circuit, relay detection method, relay, power system and automobile |
| CN112072617A (en) * | 2020-08-07 | 2020-12-11 | 王嘉欣 | Direct current circuit breaking controller |
| CN112213631B (en) * | 2020-09-03 | 2021-11-09 | 珠海格力电器股份有限公司 | Relay state detection device and method and automobile |
| CN112415372B (en) * | 2020-11-10 | 2024-05-17 | 科大智能（合肥）科技有限公司 | Relay adhesion detection circuit |
| CN112798918A (en) * | 2020-12-30 | 2021-05-14 | 重庆金康动力新能源有限公司 | Test system and test method |
| CN114217220B (en) | 2022-02-23 | 2022-05-17 | 深圳市德兰明海科技有限公司 | Switch detection circuit and method and switch detector |
| CN114753924B (en) * | 2022-04-21 | 2023-06-16 | 上海三一重机股份有限公司 | Engine preheating protection method, engine preheating protection system and operation machine |
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| Publication number | Publication date |
|---|---|
| WO2018082339A1 (en) | 2018-05-11 |
| CN106569128A (en) | 2017-04-19 |
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