CN105259452A - Device and method for uninterrupted recursive monitoring of the value of resistance of thermistors - Google Patents
Device and method for uninterrupted recursive monitoring of the value of resistance of thermistors Download PDFInfo
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- CN105259452A CN105259452A CN201510755215.9A CN201510755215A CN105259452A CN 105259452 A CN105259452 A CN 105259452A CN 201510755215 A CN201510755215 A CN 201510755215A CN 105259452 A CN105259452 A CN 105259452A
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Abstract
The invention is suitable for the technical field of thermistor technology, and provides a device for uninterrupted recursive monitoring of the value of resistance of thermistors, wherein at least two thermistors are mutually connected in parallel. A test module comprises an ammeter and a voltmeter which can measure the total current and the total voltage of a thermistor array respectively. The number of relays is equal to the number of the thermistors in the thermistor array; and the relays are connected with the corresponding thermistors in series. A voltage pulse generator is connected with the thermistor array through a relay array. A central control system controls the voltage pulse generator to generate pulse voltage, and applies to the thermistors corresponding to the relays under the connection state. The central control system controls on/off of each relay and calculates the value of resistance of each thermistor under the uninterrupted state. The value of resistance of a plurality of thermistors under the energized state can be monitored respectively; the control degree of the test process can be improved; the continuity of the test process is high; and the accuracy of the test result is improved.
Description
Technical field
The invention belongs to thermistor technology field, particularly relate to a kind of device and method of thermistor resistance not power-off circularly monitoring.
Background technology
Thermistor is a kind of non-power type device, usually need to carry out durability test by thermistor place in circuit in thermistor process of the test, then by the thermistor resistance before testing experiment, in test, after test, judge whether thermistor resistance performance is stablized according to its rate of change.
The thermistor resistance method of inspection conventional on the market at present, mainly thermistor is disconnected from the circuit, be connected in pen meter of universal meter and test, accurately cannot monitor the resistance of the thermistor in electricity process of the test like this, the continuity of thermistor test can be destroyed simultaneously, the accuracy of test findings can be affected.
Summary of the invention
The object of the embodiment of the present invention is the device and method providing a kind of thermistor resistance not power-off circularly monitoring, at least can overcome the segmental defect of prior art.
The device of a kind of thermistor resistance not power-off circularly monitoring that the embodiment of the present invention relates to, comprising: central control system, potential pulse control array, test module and hookup;
Described hookup comprises direct supply and thermistor array, and described thermistor array comprises at least two thermistors in parallel, and described direct supply provides direct supply to thermistor described in each;
Described test module comprises reometer and voltage table, measures total current and the total voltage of described thermistor array respectively;
Potential pulse controls array and comprises potential pulse generator and relay array, and described relay array comprises the relay of at least two;
The number correspondent equal of the described thermistor in described relay and described thermistor array, the described thermistor series connection that described relay is corresponding with it;
Described potential pulse generator is connected with described thermistor array by described relay array;
Described central control system controls described potential pulse generator and produces pulse voltage, acts on described thermistor corresponding to the described relay that is in connection status;
Described central control system controls the break-make of relay described in each, and the measurement data of test module described in Real-time Collection, calculates the resistance of the not off-position of thermistor described in each according to described measurement data.
As the device of a kind of thermistor resistance not power-off circularly monitoring that embodiment one relates to, described voltage table is in parallel with described thermistor array;
Described reometer is connected with described thermistor array.
Described central control system controls the break-make of relay described in each in described relay array by pilot relay break-make control panel, and control strategy is for being communicated with relay described in each successively, and random time only has a described relay to be in connected state.
Described test module measures voltage total value and the electric current total value of the thermistor of each parallel connection applied before and after pulse voltage;
Voltage difference before and after the applying pulse voltage that described test module is measured and current differential are that single tested thermistor applies voltage difference before and after pulse voltage and current differential, calculate the resistance of described tested thermistor according to described voltage difference and current differential.
The method of a kind of thermistor resistance not power-off circularly monitoring that the embodiment of the present invention relates to, comprising:
Step 1, direct supply connects and provides power supply at least two thermistors in parallel, measures total voltage and the total current of described thermistor in parallel in real time;
Step 2, is arranged and thermistor described in each and corresponding relay, the described relay series connection that thermistor described in each is corresponding with it, and potential pulse generator is connected with described thermistor by described relay;
Step 3, central control system sends test instruction, control to be communicated with relay described in each successively, random time only has a described relay to be in connected state, control described potential pulse generator and produce pulse voltage, act on described thermistor corresponding to the described relay that is in connection status, measure total voltage and the total current of described thermistor in parallel after applying pulse voltage in real time;
Step 4, calculates the resistance of thermistor described in each successively according to the measurement result of described step 1 and described step 3.
Each relay is communicated with successively in described step 3, the described thermistor that the described relay be communicated with is corresponding is tested thermistor, described potential pulse generator produces pulse voltage, makes the voltage at described tested thermistor two ends be direct current power source voltage and pulse voltage sum;
Described step 4 calculates in the process of described tested thermistor resistance, the voltage total value v1 of the described thermistor of each parallel connection before the described pulse voltage of applying measured in described step 1 and electric current total value I1, the voltage total value v2 of the described thermistor of each parallel connection after the described pulse voltage of applying measured in described step 3 and electric current total value I2, apply voltage difference and current differential that voltage difference V3 before and after described pulse voltage and current differential I3 is described tested thermistor, the resistance R:V3=V2-V1 of described tested thermistor is calculated according to described voltage difference and described current differential, I3=I2-I1, R=V3/I3.
In described step 3 and described step 4, when measuring the resistance of arbitrary described tested thermistor, the described relay of its correspondence is in the time period of connected state, be at least twice to the number of times of the pulse voltage that described tested thermistor applies, calculate described tested thermistor resistance respectively according to each measurement data, determine that described tested thermistor resistance R is the mean value of the resistance that each time calculates and stores.
Also comprise after described step 4:
Step 5, described central control system sends next lane testing instruction of test, performs described step 3-4, circularly monitoring thermistor resistance described in each.
The beneficial effect of the device and method of a kind of thermistor resistance not power-off circularly monitoring that the embodiment of the present invention provides comprises:
The device of a kind of thermistor resistance not power-off circularly monitoring provided by the invention, structure is simple, can monitor the resistance under multiple thermistor "on" position respectively, and improve process of the test management and control degree, process of the test continuity is strong, improves test findings accuracy.
The method of a kind of thermistor resistance not power-off circularly monitoring provided by the invention, can circulate and measure the resistance of multiple thermistor under not off-position respectively, process of the test continuity is strong, and result accuracy is high.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the theory diagram of the device of a kind of thermistor resistance not power-off circularly monitoring that the embodiment of the present invention provides;
Fig. 2 is the circuit theory diagrams of the device of a kind of thermistor resistance not power-off circularly monitoring that the embodiment of the present invention provides;
In figure, 1 is direct supply, and 2 is voltage table, and 3 is relay array, and 4 is thermistor array, and 5 is central control system, and 6 is reometer, and 7 is potential pulse generator.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In order to technical solutions according to the invention are described, be described below by specific embodiment.
Embodiment one
Embodiment one provided by the invention is the embodiment of the device of a kind of thermistor resistance not power-off circularly monitoring provided by the invention, be illustrated in figure 1 the theory diagram of the device of a kind of thermistor resistance not power-off circularly monitoring provided by the invention, as shown in Figure 1, this device comprises: central control system, potential pulse control array, test module and hookup.
Hookup comprises direct supply and thermistor array, and thermistor array comprises at least two thermistors in parallel, and direct supply provides direct supply to each thermistor.
Test module comprises reometer and voltage table, measures total current and the total voltage of thermistor array respectively.
Potential pulse controls array and comprises potential pulse generator and relay array, and relay array comprises the relay of at least two.The number correspondent equal of the thermistor in relay and thermistor array, the thermistor series connection that relay is corresponding with it, potential pulse generator is connected with thermistor array by relay array, central control system control voltage pulse generator produces pulse voltage, acts on thermistor corresponding to the relay that is in connection status.
Central control system controls the break-make of each relay, and the measurement data of Real-time Collection test module, calculates the resistance of each thermistor not off-position according to this measurement data.
Be illustrated in figure 2 the circuit theory diagrams of the device of a kind of thermistor resistance not power-off circularly monitoring provided by the invention, as shown in Figure 2, direct supply 1 connects and provides DC voltage to thermistor array 4, voltage table 2 is in parallel with thermistor array 4, measures the both end voltage of the thermistor of each parallel connection.Reometer 6 is connected with thermistor array 4, measures the electric current summation of the thermistor of each parallel connection.
Central control system 5 is by the break-make of each relay in pilot relay break-make control panel pilot relay array 3, and control strategy is for be communicated with each relay successively, and random time only has a relay to be in connected state.Central control system 5 control voltage pulse generator produces pulse voltage simultaneously, and the voltage being in the thermistor two ends of its correspondence of relay of connected state is direct current power source voltage and pulse voltage sum.
Central control system 5 receives the measurement data of test module, measure voltage total value and the electric current total value of the thermistor of each parallel connection applied before and after pulse voltage, voltage difference wherein before and after applying pulse voltage and current differential are voltage difference and the current differential of single tested thermistor, calculate the resistance of tested thermistor according to this voltage difference and current differential.
The device of a kind of thermistor resistance not power-off circularly monitoring provided by the invention, structure is simple, can monitor the resistance under multiple thermistor "on" position respectively, and improve process of the test management and control degree, process of the test continuity is strong, improves test findings accuracy.
Embodiment two
Embodiment two provided by the invention is the embodiment of the method for a kind of thermistor resistance not power-off circularly monitoring provided by the invention, and the method comprises:
Step 1, direct supply connects and provides power supply at least two thermistors in parallel, measures total voltage and the total current of thermistor in parallel in real time.
Step 2, is arranged and each thermistor and corresponding relay, the relay series connection that each thermistor is corresponding with it, and potential pulse generator is connected with thermistor by relay.
Step 3, central control system sends test instruction, control to be communicated with each relay successively, random time only has a relay to be in connected state, control voltage pulse generator produces pulse voltage, act on thermistor corresponding to the relay that is in connection status, measure total voltage and the total current of thermistor in parallel after applying pulse voltage in real time.
Step 4, calculates the resistance of each thermistor successively according to the measurement result of step 1 and step 3.
The method of a kind of thermistor resistance not power-off circularly monitoring provided by the invention, can circulate and measure the resistance of multiple thermistor under not off-position respectively, process of the test continuity is strong, and result accuracy is high.
Be communicated with each relay successively in step 3, the thermistor that the relay of connection is corresponding is tested thermistor, and potential pulse generator produces pulse voltage, makes the voltage at these tested thermistor two ends be direct current power source voltage and pulse voltage sum.
Step 4 calculates in the process of tested thermistor resistance, the voltage total value v1 of the thermistor of each parallel connection before the applying pulse voltage measured in step 1 and electric current total value I1, the voltage total value v2 of the thermistor of each parallel connection after the applying pulse voltage measured in step 3 and electric current total value I2, voltage difference V3 before and after applying pulse voltage and current differential I3 is voltage difference and the current differential of tested thermistor, the resistance R:V3=V2-V1 of tested thermistor is calculated according to this voltage difference and current differential, I3=I2-I1, R=V3/I3.
Further, in step 3 and step 4 when measuring the resistance of arbitrary tested thermistor, the relay of its correspondence is in the time period of connected state, be at least twice to the number of times of the pulse voltage that tested thermistor applies, calculate tested thermistor resistance respectively according to each measurement data, determine that tested thermistor resistance R is the mean value of the resistance that each time calculates and stores.The further accuracy improving the resistance measured.
Also comprise after step 4:
Step 5, central control system sends next lane testing instruction of test, performs step 3-4, each thermistor resistance of circularly monitoring.
Those of ordinary skill in the art it is also understood that, the all or part of step realized in above-described embodiment method is that the hardware that can carry out instruction relevant by program has come, described program can be stored in computer read/write memory medium, described storage medium, comprises ROM/RAM, disk, CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a device for thermistor resistance not power-off circularly monitoring, is characterized in that, described device comprises: central control system, potential pulse control array, test module and hookup;
Described hookup comprises direct supply and thermistor array, and described thermistor array comprises at least two thermistors in parallel, and described direct supply provides direct supply to thermistor described in each;
Described test module comprises reometer and voltage table, measures total current and the total voltage of described thermistor array respectively;
Potential pulse controls array and comprises potential pulse generator and relay array, and described relay array comprises the relay of at least two;
The number correspondent equal of the described thermistor in described relay and described thermistor array, the described thermistor series connection that described relay is corresponding with it;
Described potential pulse generator is connected with described thermistor array by described relay array;
Described central control system controls described potential pulse generator and produces pulse voltage, acts on described thermistor corresponding to the described relay that is in connection status;
Described central control system controls the break-make of relay described in each, and the measurement data of test module described in Real-time Collection, calculates the resistance of the not off-position of thermistor described in each according to described measurement data.
2. device as claimed in claim 1, it is characterized in that, described voltage table is in parallel with described thermistor array;
Described reometer is connected with described thermistor array.
3. device as claimed in claim 1, it is characterized in that, described central control system controls the break-make of relay described in each in described relay array by pilot relay break-make control panel, control strategy is for being communicated with relay described in each successively, and random time only has a described relay to be in connected state.
4. device as claimed in claim 1, is characterized in that, described test module measures voltage total value and the electric current total value of the thermistor of each parallel connection applied before and after pulse voltage;
Voltage difference before and after the applying pulse voltage that described test module is measured and current differential are that single tested thermistor applies voltage difference before and after pulse voltage and current differential, calculate the resistance of described tested thermistor according to described voltage difference and current differential.
5. a device for thermistor resistance not power-off circularly monitoring, is characterized in that, described method comprises:
Step 1, direct supply connects and provides power supply at least two thermistors in parallel, measures total voltage and the total current of described thermistor in parallel in real time;
Step 2, is arranged and thermistor described in each and corresponding relay, the described relay series connection that thermistor described in each is corresponding with it, and potential pulse generator is connected with described thermistor by described relay;
Step 3, central control system sends test instruction, control to be communicated with relay described in each successively, random time only has a described relay to be in connected state, control described potential pulse generator and produce pulse voltage, act on described thermistor corresponding to the described relay that is in connection status, measure total voltage and the total current of described thermistor in parallel after applying pulse voltage in real time;
Step 4, calculates the resistance of thermistor described in each successively according to the measurement result of described step 1 and described step 3.
6. method as claimed in claim 5, it is characterized in that, each relay is communicated with successively in described step 3, the described thermistor that the described relay be communicated with is corresponding is tested thermistor, described potential pulse generator produces pulse voltage, makes the voltage at described tested thermistor two ends be direct current power source voltage and pulse voltage sum;
Described step 4 calculates in the process of described tested thermistor resistance, the voltage total value v1 of the described thermistor of each parallel connection before the described pulse voltage of applying measured in described step 1 and electric current total value I1, the voltage total value v2 of the described thermistor of each parallel connection after the described pulse voltage of applying measured in described step 3 and electric current total value I2, apply voltage difference and current differential that voltage difference V3 before and after described pulse voltage and current differential I3 is described tested thermistor, the resistance R:V3=V2-V1 of described tested thermistor is calculated according to described voltage difference and described current differential, I3=I2-I1, R=V3/I3.
7. method as claimed in claim 5, it is characterized in that, in described step 3 and described step 4, when measuring the resistance of arbitrary described tested thermistor, the described relay of its correspondence is in the time period of connected state, be at least twice to the number of times of the pulse voltage that described tested thermistor applies, calculate described tested thermistor resistance respectively according to each measurement data, determine that described tested thermistor resistance R is the mean value of the resistance of each calculating and stores.
8. method as claimed in claim 5, is characterized in that, also comprises after described step 4:
Step 5, described central control system sends next lane testing instruction of test, performs described step 3-4, circularly monitoring thermistor resistance described in each.
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| CN201510755215.9A CN105259452B (en) | 2015-11-09 | 2015-11-09 | A kind of thermistor resistance value does not power off the device and method of circularly monitoring |
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| CN201510755215.9A CN105259452B (en) | 2015-11-09 | 2015-11-09 | A kind of thermistor resistance value does not power off the device and method of circularly monitoring |
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| CN114812869A (en) * | 2022-03-11 | 2022-07-29 | 华中科技大学 | Thermistor voltage effect test circuit and system |
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