CN112129428A - Method and system for automatically testing resistance value and marking of automobile temperature sensor - Google Patents
Method and system for automatically testing resistance value and marking of automobile temperature sensor Download PDFInfo
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- CN112129428A CN112129428A CN202010777975.0A CN202010777975A CN112129428A CN 112129428 A CN112129428 A CN 112129428A CN 202010777975 A CN202010777975 A CN 202010777975A CN 112129428 A CN112129428 A CN 112129428A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K15/00—Testing or calibrating of thermometers
- G01K15/007—Testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
Abstract
A method for automatically testing resistance and marking an automobile temperature sensor comprises the following steps: loading an automobile temperature sensor to be detected on a position fixer in a constant temperature water pool; detecting the temperature of a constant-temperature water tank where a temperature sensor to be detected is located, and detecting the resistance value of the automobile temperature sensor to be detected if the detected temperature of the constant-temperature water tank meets the temperature stability standard; comparing the resistance value measured by the automobile temperature sensor to be measured with a preset threshold resistance value range; and if the resistance value of the automobile temperature sensor to be detected is within the preset threshold resistance value range, controlling the cylinder marking mechanism to mark the current automobile temperature sensor to be detected, and marking the current automobile temperature sensor to be detected as a qualified product. The invention optimizes the existing manual test of the automobile temperature sensor into automatic test, and improves the test efficiency and the test reliability. The invention can more intuitively express the whole process of the automobile temperature sensor test on the test software, and the test data is automatically stored in the local, thereby facilitating the later-stage tracing and research and analysis.
Description
Technical Field
The invention relates to the technical field of resistance measurement of temperature sensors, in particular to a method and a system for automatically testing and marking resistance of an automobile temperature sensor.
Background
The method for testing the automobile temperature sensor in the prior art comprises the following steps: immersing a sensor to be measured in a constant-temperature water tank according to the matrix, connecting a temperature standard sample with a universal meter, and manually observing the temperature standard sample to wait for the temperature of water to be constant; then, after the temperature of the water is stable, a timer is manually adopted for timing, and the product is kept at the constant temperature for 2 minutes; then, manually holding two meter pens of the universal meter, and sequentially testing the to-be-tested object by one meter pen.
The testing mode depends on the standard operation of the staff, the staff can flow out a defective product with a resistance value due to slight negligence, for example, the constant water temperature standard can not be given, the situation that the staff holds the meter pen to miss the test and retest can not be found by the experience of the staff, and whether the constant temperature time of the product to be tested can not be perceived according to the requirement or not. Therefore, the prior art can not ensure to screen the sensors with 100 percent of resistance values qualified at all, and the prior testing process is complicated and has low efficiency.
Disclosure of Invention
In view of the above, the present invention has been made to provide a method and system for automatically testing and marking a resistance value of a vehicle temperature sensor that overcomes or at least partially solves the above-mentioned problems.
A method for automatically testing resistance and marking an automobile temperature sensor comprises the following steps:
s100, loading the automobile temperature sensor to be detected on a position fixer in a constant temperature water pool to ensure that the automobile temperature sensor to be detected is fixed;
s200, detecting the temperature of a constant-temperature water tank where a temperature sensor to be detected is located, and detecting the resistance value of the automobile temperature sensor to be detected if the detected temperature of the constant-temperature water tank meets the temperature stability standard;
s300, comparing the resistance value measured by the automobile temperature sensor to be measured with a preset threshold resistance value range, and judging whether the resistance value of the automobile temperature sensor to be measured is within the preset threshold resistance value range or not;
s400, if the resistance value of the automobile temperature sensor to be detected is within the preset threshold resistance value range, controlling the cylinder marking mechanism to mark the current automobile temperature sensor to be detected, and marking the current automobile temperature sensor to be detected as a qualified product. And if the resistance value of the automobile temperature sensor to be detected is not within the preset threshold resistance value range, directly rejecting the defective products.
Further, in S200, the method for detecting the temperature of the constant-temperature water tank in which the temperature sensor to be detected is located includes: the resistance value of the standard sample is fixed in the constant-temperature water tank, the relation between the resistance value and the temperature of the standard sample resistor is obtained in advance, testing software is set in advance to measure the resistance time and scan the frequency of the standard sample, the resistance value of the standard sample resistance value within a period of continuous time is measured, the standard sample resistor is judged according to preset rules, and the purpose of detecting the temperature of the constant-temperature water tank is achieved.
Further, the standard sample resistance is judged through a preset rule, and the preset rule comprises the following steps: and (3) forming the scanned resistance data of the standard sample into a row of arrays, calculating the mean value X and the standard deviation of the arrays, and if the mean value X and the standard deviation are less than or equal to X X0.02%, determining that the water temperature meets the constant temperature condition.
Further, the preset rule further includes: and if the mean value X and the standard deviation of the obtained standard sample resistance data do not meet X0.02 percent or less, clearing the current standard sample resistance data, continuously collecting the resistance value of the standard sample, recalculating the mean value X and the standard deviation of the resistance value of the standard sample, and repeating the steps until the mean value X and the standard deviation meet X0.02 percent or less.
Further, in S500, whether the current automobile temperature sensor to be tested is qualified or not can be displayed to the user through the color of the indicator light, and when the automobile temperature sensor to be tested is qualified, the indicator light is green; when the automobile temperature sensor to be detected is a defective product, the indicating lamp is totally red.
Further, the cylinder marking mechanism includes: the paint pen comprises a cylinder, a linear guide rail, a paint pen with a telescopic head and a support frame mechanism, wherein the cylinder provides thrust, the linear guide rail ensures that the paint pen moves in a vertical direction, the paint pen can mark a temperature sensor of an automobile to be detected, and the support frame mechanism plays a role in fixing the position of the cylinder, the linear guide rail and the paint pen.
Further, the cylinder marking mechanism is controlled by a cylinder circuit control unit, wherein the cylinder circuit control unit is composed of a switch power supply, a relay module and an electromagnetic valve.
Furthermore, the raw material of the position fixer is epoxy resin, 7 automobile temperature sensors to be detected are loaded at one time, and two metal pins of the automobile temperature sensors to be detected transmit electric signals to test software through elastic probes.
The invention also discloses a system for automatically testing the resistance value and marking of the automobile temperature sensor, which is characterized by comprising the following steps: the device comprises a position fixer, a universal meter, test software, a cylinder circuit control unit and a cylinder marking machine; wherein:
the position fixer is used for fixing the automobile temperature sensor to be detected into the constant temperature water pool;
the input end of the resistance measuring device is connected with the automobile temperature sensor to be measured, the output end of the resistance measuring device is connected with the testing software, the resistance value of the automobile temperature sensor to be measured is measured, and the resistance value of the automobile temperature sensor to be measured is transmitted to the testing software;
the test software is used for receiving the resistance value of the automobile temperature sensor to be tested, comparing the resistance value measured by the automobile temperature sensor to be tested with a preset threshold resistance value range, sending an air cylinder control instruction to the air cylinder circuit control unit according to the comparison result and controlling the operation of the air cylinder marking machine;
the cylinder circuit control unit receives a cylinder control instruction sent by the test software and controls the cylinder marking machine to mark the resistance value of the automobile temperature sensor to be tested;
and the cylinder marking machine is controlled by the cylinder circuit control unit and marks the resistance value of the automobile temperature sensor to be detected.
Furthermore, the input end of the resistance measuring device is also connected with a standard sample resistor, the output end of the resistance measuring device is connected with testing software, the universal meter obtains the resistance value of the standard sample resistor, the testing software sets the resistance measuring time and the standard sample scanning frequency, and the purpose of temperature detection is carried out on the constant-temperature water pool through the relation between the standard sample resistor and the temperature obtained in advance.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
the method and the system for automatically testing the resistance value and marking the automobile temperature sensor disclosed by the invention improve the existing manual test of the automobile temperature sensor into an automatic test, thereby improving the test efficiency and the test reliability. The internal operation logic of the test software is limited, so that the products which are subjected to error test and missing test and caused by the irregular operation of operators can be prevented from flowing out. The invention can more intuitively express the whole process of the automobile temperature sensor test on the test software, and the test data is automatically stored in the local, thereby facilitating the later-stage tracing and research and analysis. And, compared with the prior art, the control to the thermostatic bath temperature is sensitive meticulous, reduces greatly because the test error that the thermostatic bath temperature fluctuation brought to improved the resistance test accuracy degree. The products passing the test are marked with obvious and easily-distinguished marks, and compared with the prior mode without any treatment, the method has higher distinguishing degree.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flowchart of a method for automatically testing and marking a resistance value of an automotive temperature sensor according to embodiment 1 of the present invention;
fig. 2 is a structural diagram of a method for automatically testing and marking a resistance value of an automobile temperature sensor according to embodiment 2 of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Example 1
A method for automatically testing resistance and marking an automobile temperature sensor is characterized by comprising the following steps:
s100, loading the automobile temperature sensor to be detected on a position fixer in a constant temperature water pool, and ensuring that the automobile temperature sensor to be detected is fixed.
In some preferred embodiments, the raw material of the position fixer is epoxy resin, 7 automobile temperature sensors to be tested are loaded at one time, two metal pins of the automobile temperature sensors to be tested transmit signals through elastic probes, the surfaces of the probes are plated with gold, the contact impedance of the test probes and the pins of the temperature sensor products is smaller than 10m omega, the tail parts of the test probes are welded through copper core wires, the signals are led out to the wiring terminals of the relays of the control unit, and test software adjusts a universal meter to read which resistance value by controlling the states of the relays 'Action'/'OFF'. The connection method ensures that the metal pins of the product are prevented from being damaged by 'hard contact' under the condition of good connection.
S200, temperature detection is carried out on a constant-temperature water tank where the temperature sensor to be detected is located, and if the temperature of the constant-temperature water tank is detected to meet the temperature stability standard, resistance value detection is carried out on the automobile temperature sensor to be detected.
In some preferred embodiments, the method for detecting the temperature of the constant-temperature water tank in which the temperature sensor to be detected is located comprises the following steps: the resistance value of the standard sample is fixed in the constant-temperature water tank, the relation between the resistance value and the temperature of the standard sample resistor is obtained in advance, testing software is set in advance to measure the resistance time and scan the frequency of the standard sample, the resistance value of the standard sample resistance value within a period of continuous time is measured, the standard sample resistor is judged according to preset rules, and the purpose of detecting the temperature of the constant-temperature water tank is achieved.
Further, the standard sample resistance is judged through a preset rule, and the preset rule comprises the following steps: and (3) forming the scanned resistance data of the standard sample into a row of arrays, calculating the mean value X and the standard deviation of the arrays, and if the mean value X and the standard deviation are less than or equal to X X0.02%, determining that the water temperature meets the constant temperature condition. The preset rule further comprises: and if the mean value X and the standard deviation of the obtained standard sample resistance data do not meet X0.02 percent or less, clearing the current standard sample resistance data, continuously collecting the resistance value of the standard sample, recalculating the mean value X and the standard deviation of the resistance value of the standard sample, and repeating the steps until the mean value X and the standard deviation meet X0.02 percent or less.
S300, comparing the resistance value measured by the automobile temperature sensor to be measured with a preset threshold resistance value range, and judging whether the resistance value of the automobile temperature sensor to be measured is within the preset threshold resistance value range.
It can be understood that, when the resistance value of the automobile temperature sensor is tested, the temperature and the resistance value of the temperature sensor have a certain definite relation before the test, which is also the key for the normal operation of the automobile temperature sensor. Through the step S200, the temperature T of the constant-temperature water pool can be obtained, the resistance value threshold value R corresponding to the temperature T can be obtained according to the relationship between the temperature and the resistance value obtained in advance, and the actual resistance of the automobile temperature sensor measured through the step S300 is R1.
S400, if the resistance value of the automobile temperature sensor to be detected is within the preset threshold resistance value range, controlling the cylinder marking mechanism to mark the current automobile temperature sensor to be detected, and marking the current automobile temperature sensor to be detected as a qualified product. And if the resistance value of the automobile temperature sensor to be detected is not within the preset threshold resistance value range, directly taking the current automobile temperature sensor to be detected as a defective product to be rejected.
Specifically, the measured actual resistance of the automobile temperature sensor is R1, and the resistance value threshold corresponding to the temperature T is R, if the measured actual resistance of the automobile temperature sensor is R1 within the resistance value threshold R, the cylinder marking mechanism is controlled to mark the current automobile temperature sensor to be measured, and the current automobile temperature sensor to be measured is marked as a qualified product. And if the measured actual resistance of the automobile temperature sensor is R1 and is not within the resistance value threshold value R, directly rejecting the defective products.
In some preferred embodiments, the cylinder marking mechanism comprises: the paint pen comprises a cylinder, a linear guide rail, a paint pen with a telescopic head and a support frame mechanism, wherein the cylinder provides thrust, the linear guide rail ensures that the paint pen moves in a vertical direction, the paint pen can mark a temperature sensor of an automobile to be detected, and the support frame mechanism plays a role in fixing the position of the cylinder, the linear guide rail and the paint pen.
Preferably, the cylinder marking mechanism consists of 7 MSA16x50SCA0 type cylinders, a linear guide rail, a head telescopic pigment pen and a support frame mechanism, and the main body support frame is made of aluminum. The cylinder provides thrust, and linear guide rail guarantees that the motion of pigment pen is vertical direction, and the pigment pen can print the conspicuous mark on the article that awaits measuring, and support frame mechanism plays the fixed position effect for cylinder, guide rail, pigment pen, and above each part is supplementary to become to constitute pneumatic marking frock mutually. The pigment pen head can stretch out and draw back by 1 ~ 3mm scope, can not cause the damage to the product surface when seal mark, and the height of pigment pen can 100 ~ 300mm range adjustment moreover, makes things convenient for the nib just in time to be compressed 2 +/-0.5 mm, makes the printing ink oil output just right when dotting.
In some preferred embodiments, the cylinder marking mechanism is controlled by a cylinder circuit control unit, wherein the cylinder circuit control unit consists of a switching power supply, a relay module and a solenoid valve. Preferably, the cylinder circuit control unit comprises 7 3V110-06-DC24V electromagnetic valves, 1 switching power supply, a 16-bit relay module and a fixed support seat, the relay module is communicated through TCP and controlled by computer test software so as to control the opening and closing of the electromagnetic valves, and the switching power supply provides stable power supply for the relay module and the electromagnetic valves.
According to the method for automatically testing the resistance value and marking the automobile temperature sensor, the existing manual test on the automobile temperature sensor is optimized and improved into the automatic test, and the test efficiency and the test reliability are improved. The internal operation logic of the test software is limited, so that the products which are subjected to error test and missing test and caused by the irregular operation of operators can be prevented from flowing out. The invention can more intuitively express the whole process of the automobile temperature sensor test on the test software, and the test data is automatically stored in the local, thereby facilitating the later-stage tracing and research and analysis. And, compared with the prior art, the control to the thermostatic bath temperature is sensitive meticulous, reduces greatly because the test error that the thermostatic bath temperature fluctuation brought to improved the resistance test accuracy degree. The products passing the test are marked with obvious and easily-distinguished marks, and compared with the prior mode without any treatment, the method has higher distinguishing degree.
Example 2
The embodiment discloses a system for automatically testing resistance and marking of an automobile temperature sensor, which is characterized by comprising: the device comprises a position fixer, a universal meter, test software, a cylinder circuit control unit and a cylinder marking machine; wherein:
and the position fixer is used for fixing the automobile temperature sensor to be measured into the constant temperature water pool. The position fixer is made of epoxy resin, 7 automobile temperature sensors to be tested are loaded at one time, two metal pins of the automobile temperature sensors to be tested transmit signals through elastic probes, the surfaces of the probes are plated with gold, the contact impedance of the test probes and the product pins is smaller than 10m omega, the tail portions of the test probes are welded through copper core wires, the signals are led out to the wiring ends of relays of the control unit, and test software adjusts a universal meter to read which resistance value through controlling the states of the relays 'Action'/'OFF'. The connection method ensures that the metal pins of the product are prevented from being damaged by 'hard contact' under the condition of good connection.
And the input end of the resistance measuring device is connected with the automobile temperature sensor to be measured, the output end of the resistance measuring device is connected with the testing software, the resistance value of the automobile temperature sensor to be measured is measured, and the resistance value of the automobile temperature sensor to be measured is transmitted to the testing software. Preferably, the resistance measuring device adopts a 6-bit semi-high precision multimeter of a Keysight34461 model, so that the accuracy of resistance measurement is ensured.
And the test software is used for receiving the resistance value of the automobile temperature sensor to be tested, comparing the resistance value measured by the automobile temperature sensor to be tested with a preset threshold resistance value range, and sending an air cylinder control instruction to the air cylinder circuit control unit according to the comparison result to control the operation of the air cylinder marking machine.
Preferably, the test software is developed based on Labview brand new, and the later maintenance and the function upgrade can be completed independently. The brain test software provides a human-computer interaction interface, a person can know the test progress, observe the state of the timer, observe the number of the counters, observe the test result and the like through the test software, the software automatically identifies the temperature of the thermostatic bath, the self-contained timer and the self-contained counter, and the test data is automatically stored in a local hard disk of a computer for tracing. The result shows that the rule is: when a test failure occurs, the corresponding numbered circular "indicator light" changes from green to red.
The cylinder circuit control unit receives a cylinder control instruction sent by the test software and controls the cylinder marking machine to mark the resistance value of the automobile temperature sensor to be tested; preferably, the cylinder circuit control unit comprises 7 3V110-06-DC24V electromagnetic valves, 1 switching power supply, a 16-bit relay module and a fixed support seat, the relay module is communicated through TCP and controlled by computer test software so as to control the opening and closing of the electromagnetic valves, and the switching power supply provides stable power supply for the relay module and the electromagnetic valves.
And the cylinder marking machine is controlled by the cylinder circuit control unit and marks the resistance value of the automobile temperature sensor to be detected. Preferably, the cylinder marking mechanism consists of 7 MSA16x50SCA0 type cylinders, a linear guide rail, a head telescopic pigment pen and a support frame mechanism, and the main body support frame is made of aluminum. The cylinder provides thrust, and linear guide rail guarantees that the motion of pigment pen is vertical direction, and the pigment pen can print the conspicuous mark on the article that awaits measuring, and support frame mechanism plays the fixed position effect for cylinder, guide rail, pigment pen, and above each part is supplementary to become to constitute pneumatic marking frock mutually. The pigment pen head can stretch out and draw back by 1 ~ 3mm scope, can not cause the damage to the product surface when seal mark, and the height of pigment pen can 100 ~ 300mm range adjustment moreover, makes things convenient for the nib just in time to be compressed 2 +/-0.5 mm, makes the printing ink oil output just right when dotting.
According to the system for automatically testing the resistance value and marking the automobile temperature sensor, the existing manual test on the automobile temperature sensor is optimized and improved into the automatic test, and the test efficiency and the test reliability are improved. The internal operation logic of the test software is limited, so that the products which are subjected to error test and missing test and caused by the irregular operation of operators can be prevented from flowing out. The invention can more intuitively express the whole process of the automobile temperature sensor test on the test software, and the test data is automatically stored in the local, thereby facilitating the later-stage tracing and research and analysis. And, compared with the prior art, the control to the thermostatic bath temperature is sensitive meticulous, reduces greatly because the test error that the thermostatic bath temperature fluctuation brought to improved the resistance test accuracy degree. The products passing the test are marked with obvious and easily-distinguished marks, and compared with the prior mode without any treatment, the method has higher distinguishing degree.
It should be understood that the specific order or hierarchy of steps in the processes disclosed is an example of exemplary approaches. Based upon design preferences, it is understood that the specific order or hierarchy of steps in the processes may be rearranged without departing from the scope of the present disclosure. The accompanying method claims present elements of the various steps in a sample order, and are not intended to be limited to the specific order or hierarchy presented.
In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. Of course, the processor and the storage medium may reside as discrete components in a user terminal.
For a software implementation, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in memory units and executed by processors. The memory unit may be implemented within the processor or external to the processor, in which case it can be communicatively coupled to the processor via various means as is known in the art.
What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".
Claims (10)
1. A method for automatically testing resistance and marking an automobile temperature sensor is characterized by comprising the following steps:
s100, loading the automobile temperature sensor to be detected on a position fixer in a constant temperature water pool to ensure that the automobile temperature sensor to be detected is fixed;
s200, detecting the temperature of a constant-temperature water tank where a temperature sensor to be detected is located, and detecting the resistance value of the automobile temperature sensor to be detected if the detected temperature of the constant-temperature water tank meets the temperature stability standard;
s300, comparing the resistance value measured by the automobile temperature sensor to be measured with a preset threshold resistance value range, and judging whether the resistance value of the automobile temperature sensor to be measured is within the preset threshold resistance value range or not;
s400, if the resistance value of the automobile temperature sensor to be detected is within the preset threshold resistance value range, controlling an air cylinder marking mechanism to mark the current automobile temperature sensor to be detected as a qualified product; and if the resistance value of the automobile temperature sensor to be detected is not within the preset threshold resistance value range, directly rejecting the current automobile temperature sensor.
2. The method for automatically testing the resistance value and marking the temperature sensor of the automobile according to claim 1, wherein in the step S200, the method for detecting the temperature of the constant-temperature water tank in which the temperature sensor to be tested is located comprises the following steps: the resistance value of the standard sample is fixed in a constant temperature water pool, the relation between the resistance value and the temperature of the standard sample resistor is obtained in advance, test software is set in advance to measure the resistance time and scan the frequency of the standard sample, the resistance value of the standard sample within a period of continuous time is measured, the standard sample resistor is judged according to preset rules, and the purpose of detecting the temperature of the constant temperature water pool is achieved.
3. The method for automatically testing the resistance value and marking the automobile temperature sensor according to claim 2, wherein the standard sample resistance is judged by a preset rule, and the preset rule comprises the following steps: and (3) forming the scanned standard sample resistance data into a row of arrays, calculating the mean value X and the standard deviation of the arrays, and if the mean value X and the standard deviation are less than or equal to X X0.02%, determining that the water temperature of the water pool meets the constant temperature condition.
4. A method for automatically testing resistance and marking a temperature sensor for an automobile according to claim 3, wherein the predetermined rule further comprises: and if the mean value X and the standard deviation of the standard sample resistance data do not meet X0.02%, clearing the current standard sample resistance data, continuously collecting the resistance value of the standard sample, recalculating the mean value X and the standard deviation of the resistance value of the standard sample, and repeating the steps until the mean value X and the standard deviation meet X0.02%.
5. The method for automatically testing the resistance value and marking the automobile temperature sensor according to claim 1, wherein in the step S400, whether the current automobile temperature sensor to be tested is qualified or not can be judged by displaying the color of the indicator light to a user, and when the automobile temperature sensor to be tested is qualified, the indicator light is green; when the automobile temperature sensor to be detected is a defective product, the indicator light is red.
6. The method for automatically testing resistance and marking an automobile temperature sensor according to claim 1, wherein the cylinder marking mechanism comprises: the paint pen comprises a cylinder, a linear guide rail, a paint pen with a telescopic head and a support frame mechanism, wherein the cylinder provides thrust, the linear guide rail ensures that the paint pen moves in a vertical direction, the paint pen can mark a temperature sensor of an automobile to be detected, and the support frame mechanism plays a role in fixing the position of the cylinder, the linear guide rail and the paint pen.
7. The method for automatically testing resistance and marking an automobile temperature sensor according to claim 1, wherein the cylinder marking mechanism is controlled by a cylinder circuit control unit, wherein the cylinder circuit control unit comprises a switching power supply, a relay module and an electromagnetic valve.
8. The method for automatically testing the resistance value and marking the automobile temperature sensor according to claim 1, wherein the position fixer is made of epoxy resin, 7 automobile temperature sensors to be tested are loaded at one time, and two metal pins of the automobile temperature sensors to be tested transmit electric signals to test software through elastic probes.
9. A system for automatically testing resistance and marking an automobile temperature sensor is characterized by comprising: the device comprises a position fixer, a resistance measuring device, test software, a cylinder circuit control unit and a cylinder marking machine; wherein:
the position fixer is used for fixing the automobile temperature sensor to be detected into the constant temperature water pool;
the input end of the resistance measuring device is connected with the automobile temperature sensor to be measured, the output end of the resistance measuring device is connected with the testing software, the resistance value of the automobile temperature sensor to be measured is measured, and the resistance value of the automobile temperature sensor to be measured is transmitted to the testing software;
the test software is used for receiving the resistance value of the automobile temperature sensor to be tested, comparing the resistance value measured by the automobile temperature sensor to be tested with a preset threshold resistance value range, sending an air cylinder control instruction to the air cylinder circuit control unit according to the comparison result and controlling the operation of the air cylinder marking machine;
the cylinder circuit control unit receives a cylinder control instruction sent by the test software and controls the cylinder marking machine to mark the resistance value of the automobile temperature sensor to be tested;
and the cylinder marking machine is controlled by the cylinder circuit control unit and marks the resistance value of the automobile temperature sensor to be detected.
10. The system for automatically testing and marking the resistance value of the automobile temperature sensor according to claim 9, wherein the input end of the resistance measuring device is further connected with a standard sample resistor, the output end of the resistance measuring device is connected with the testing software, the resistance measuring device obtains the resistance value of the standard sample resistor, the testing software sets the resistance measuring time and the standard sample scanning frequency, measures the resistance value of the standard sample resistance value for a continuous period of time according to the relation between the standard sample resistor and the temperature obtained in advance, and judges the standard sample resistor according to the preset rule, thereby achieving the purpose of detecting the temperature of the constant-temperature water tank.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113189147A (en) * | 2021-04-30 | 2021-07-30 | 中国商用飞机有限责任公司 | Method, system and medium for detecting electrical property of windshield glass |
| CN113567010A (en) * | 2021-08-17 | 2021-10-29 | 安徽江淮汽车集团股份有限公司 | Engine temperature sensor test system and test method |
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