JP2008209221A - System and method for measuring temperature of tire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To quickly and correctly measure an internal temperature of a tire even if manpower and cost are reduced. <P>SOLUTION: A temperature measurement system measures the internal temperature of the tire 12 on a testing machine 10 in a static state after it runs. A temperature sensor comprises thermocouples, is inserted into a hole formed at a desired location in the tire, and measures the temperature of the tire. The temperature sensor includes a plurality of the thermocouples is connected to one wireless sub unit 45 by a lead wire 42. An analyzer as a computer connected to a wireless main unit 50 analyzes temperature data transmitted from a plurality of the wireless sub units 45 to the wireless main unit, and measures the correct internal temperature of the tire. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a temperature measurement system and a measurement method for measuring the internal temperature of a tire by inserting a temperature sensor composed of a thermocouple into a tire that is stationary after a test run.

  For the purpose of tire design and quality assurance, or to acquire basic data for detecting abnormalities that cause failure such as separation or bursting due to abnormal heat generation inside the tire, The temperature of the rubber part inside the tire is directly measured by a temperature sensor composed of a thermocouple (see, for example, Patent Document 1).

  Heat generation inside the tire usually occurs at the boundary between structural members having different rigidity, that is, at the structure part. However, the heavy load tire, particularly the construction vehicle tire, which is the subject of the present invention, has a maximum diameter of 4 m and a width of 2 m. If the temperature of the rubber in the vicinity of the tire is to be measured directly, it is necessary to measure the temperature at a depth of several centimeters to several tens of centimeters from the tire surface. In order to know more accurate temperature performance, it is necessary to provide more measurement points on the tire.

  By the way, a temperature sensor composed of a thermocouple (hereinafter simply referred to as a thermocouple) has a heat capacity including a high-temperature refractory metal that covers the thermocouple. Therefore, even if temperature measurement is started, temperature equilibrium is not reached unless a certain period of time is started. That is, there is a problem that correct temperature cannot be measured unless temperature data is acquired after confirming the temperature transition.

  Therefore, although not described in the patent literature, for example, when measuring the temperature inside the tire using a temperature measuring device in which a display and a thermocouple are integrated (referred to as a direct display type), an operator displays Read the temperature data by monitoring each unit and confirm that the thermocouple is normal or in a thermal equilibrium state, or if equipped with a temperature data recording function, The temperature data is separately input into an analyzer and analyzed to obtain temperature data after temperature transition.

Since the measurement of the internal temperature of the tire is performed by temporarily stopping the tire during the test running, if the measurement takes a long time, the tire temperature decreases during that time, and a correct temperature measurement cannot be performed. For this reason, it is necessary to perform measurement quickly within a limited time. For example, if one tries to accurately measure the tire width for construction machinery with a maximum diameter of 4 m and a width of about 2 m, and the tire temperature in the circumferential direction, one person is often used. Only temperature data of about 3 measurement points can be obtained.
In order to increase the number of measurement points, it is only possible to increase the number of measurers or repeat the same test. In any case, it is expensive and it is difficult to carry out measurement at a low cost.

  In addition, when analyzing the collected temperature data, the tire testing machine must be put on standby until the analysis is completed, and data defects such as a thermocouple defect or a shallow thermocouple installation depth must be confirmed. If the response after confirming the data failure is delayed, the tire temperature may decrease during that time, and retesting may be required, resulting in increased costs.

  Therefore, although not described in the patent literature, a temperature sensor composed of a plurality of thermocouples is connected to one recorder or a dedicated data logger via lead wires, and the monitoring position is composed of each thermocouple. A lead wire type temperature measurement system is known in which the lead wire is extended to give a certain degree of freedom in the installation position rather than the installation position of the temperature sensor.

FIG. 6 is a diagram schematically showing this conventional tire internal temperature measurement system.
In this tire internal temperature measurement system, a tire testing machine 10 includes a tire support frame 20 that rotatably supports a tire 12 to be tested, and a drum 30 that has a circumferential surface that serves as a rotating road surface that contacts the test tire 12. It has become. As shown in the figure, the tire support frame 20 is substantially L-shaped in a side view made up of a horizontal frame 22 and a vertical frame 24, and the vertical frame 24 has the support frame 20 in the advancing and retracting direction with respect to the drum 30. An advancing / retreating mechanism 26 such as a hydraulic cylinder is attached to adjust the contact pressure of the tire 12 with respect to the drum 30. The drum 30 is rotatably attached to the support column 32 by appropriate means.

  A support frame 28 that horizontally supports the tire 12 by a drive mechanism (not shown) is attached to the vertical frame 24 at the upper and lower intermediate positions. The tire 12 has a depth of several centimeters to several tens of centimeters so that holes (not shown) into which a thermocouple is inserted in order to measure the temperature inside the tire 12 reach the tire structure at several locations spaced apart in the circumferential direction of the tire. These are provided side by side in the tire width direction. The tire temperature is measured by inserting a thermocouple into the hole and measuring the internal temperature. The measured temperature information is transmitted through a lead wire 42 connected to a thermocouple to a recorder or a dedicated data logger 44 connected to the other end of the lead wire 42. This recorder or dedicated data logger 44 is attached to the testing machine 10 or an appropriate position around it. The operator measures the temperature while monitoring the temperature data displayed on the display unit 44 a of the recorder or the dedicated data logger 44.

  Here, when measuring the width and the circumferential temperature of a construction machine tire having a maximum diameter of 4 m and a width of about 2 m as described above, the above-described lead-type temperature measurement system places the thermocouple on the tire at a low position. When inserted, the opposite side is about 4 m above, and a person moves to the opposite side while securing a foothold, or the work of inserting a thermocouple by rotating the tire is performed.

  When securing the scaffolds on the opposite sides of the tire 12, the lead wire 42, the recorder, and the dedicated data logger 44 must be moved to a height of 4 m. Therefore, the safety of work may not be ensured. In addition, if the place where the recorder 44 is placed is divided into a low place and a high place, a person is placed at each place and the temperature transition is monitored to determine whether there is an abnormality in the insertion of a temperature sensor composed of a thermocouple. Therefore, there is a problem that a lot of personnel are required and the test cost is increased.

  On the other hand, when inserting the thermocouple by rotating the tire 12, it is not necessary to provide a scaffold, but the lead wire 42 needs to be 4 m or more. Further, since the weight of the recorder and the dedicated data logger 44 is large, if the tire 12 is rotated, the tension due to the above weight is applied to the thermocouple previously inserted, and the thermocouple comes out or the length of the lead wire 42 is increased. If there is a shortage, the lead wire 42 may be disconnected or the recorder 44 may be forcibly pulled and damaged.

  In addition, a sensor that measures the pressure and temperature inside the tire and a transmitter are combined, a transmitter that wirelessly transmits data measured by the sensor to the outside of the tire, and a receiver that receives measurement data transmitted from the transmitter There is also known an apparatus for measuring the temperature inside a tire by using (see Patent Document 2).

  However, since this temperature sensor is provided in the tire pressure alarm device and measures the air temperature of the tire internal pressure portion, the measured temperature does not necessarily match the temperature of the heat generating portion of the tire rubber. In addition, since this conventional temperature measuring device is a device in which a sensor and a transmitter are paired and always exist inside the tire, the temperature sensor is attached to the tire only when testing the tire with a tire testing machine, for example. There is also a problem that it cannot be used and a cost is required because a transmitter is provided for each sensor.

JP 2002-362114 A JP 2005-136937 A

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to enable quick and accurate measurement of heat inside a heavy-duty tire while suppressing manpower and cost.

The invention of claim 1 is a temperature measurement system for measuring the internal temperature of a tire after running in a stationary state, and a temperature sensor comprising a thermocouple for measuring the internal temperature of the tire, and the temperature sensor detects the temperature. A slave unit having a communication unit for transmitting temperature data; a master unit having a communication unit for receiving temperature data transmitted from the slave unit; and an analyzer connected to the master unit, wherein the analyzer is The temperature data input from the master unit is processed and displayed.
According to a second aspect of the present invention, in the temperature measurement system according to the first aspect, the temperature sensors including the plurality of thermocouples are connected to the slave unit via lead wires.
According to a third aspect of the present invention, in the temperature measurement system according to the first or second aspect, the slave unit is attached to the rim of the tire via a magnet type attaching / detaching plate.
According to a fourth aspect of the present invention, there is provided the temperature measuring system according to any one of the first to third aspects, further comprising means for fixing the lead wire to a tire between the temperature sensor composed of the thermocouple and the slave unit. It is characterized by that.
According to a fifth aspect of the present invention, in the temperature measurement system according to any one of the first to fourth aspects, the master unit can communicate with a plurality of slave units mounted on the same or different tires. .
The invention of claim 6 is a method for measuring the internal temperature of a tire that is carried out by stopping after traveling, the step of inserting a temperature sensor comprising a thermocouple into the inside of the tire, and the temperature data detected by the temperature sensor. The method includes a step of transmitting, a step of receiving the temperature data, a step of processing the received temperature data for display, and a step of displaying the processed temperature data.
The invention according to claim 7 is the temperature measuring method according to claim 6, wherein the step of attaching the means for transmitting the temperature data detected by the temperature sensor to the rim of the tire via the magnetic attachment / detachment plate is provided. It is characterized by having.

(Function)
According to the present invention, by connecting a plurality of temperature measuring means for measuring the temperature inside the tire to one wireless slave unit and transmitting measured temperature data to the master unit via the wireless slave unit, Analyze and display temperature data measured on the side.
That is, the operator rotates the tire on the test machine, stops at the position of the thermocouple mounting hole provided at an arbitrary position of the tire, and inserts the thermocouple into the hole. By repeating this operation, thermocouples can be quickly attached to all necessary portions of the tire.
Temperature data from the thermocouple is transmitted from the slave unit connected by the lead wire to the master unit. The master unit passes the received temperature data inside the tire to an analyzer consisting of a computer, and displays the result on the display unit of the analyzer after the analysis.

According to the present invention, temperature data transmitted from a plurality of slave units can be received by a single master unit and immediately analyzed by an analyzer. Therefore, monitoring of tire internal temperature and data management can be performed at one place. Is possible. Therefore, the number of measurement points can be increased without increasing the number of manpower, and the tire internal temperature can be measured quickly and accurately. Therefore, it is possible to easily measure the internal temperature of heavy-duty large tires such as construction vehicle tires.
In addition, since the cordless handset is lightweight, the possibility of measurement failure can be reduced because there is less risk of pulling and pulling off as the tire rotates when attaching a temperature sensor consisting of a thermocouple. In addition, even if an abnormality occurs in the temperature data, since the abnormality can be quickly grasped, the tire temperature does not decrease and the test is not repeated as in the conventional case.
Furthermore, monitoring of the internal temperatures of the plurality of test tires can be performed centrally with a single display means, and manpower can be saved.

An embodiment of a temperature measurement system inside a tire according to the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram schematically showing a temperature measurement system inside a tire according to an embodiment of the present invention.
In the temperature measurement system according to the present embodiment, the tire testing machine 10 is the same as the conventional one. Therefore, in FIG. 1, the same parts as those described for the conventional system shown in FIG. Is omitted.

In the tire internal temperature measurement system according to the present embodiment, a lightweight wireless slave unit is provided at the other end of the lead wire 42 connected to a thermocouple, which is a conventional temperature measurement sensor, instead of a heavy recorder. 45 is attached. The wireless slave unit 45 is attached to the rim of the tire 12 by being magnetically attracted to an iron rim by using, for example, a magnet-type detachable plate 46.
The thermocouple 40 is drilled at a depth of several centimeters to several tens of centimeters at a plurality of locations (for example, 10 locations) along the tire width, for example, at equal intervals along the outer periphery of the tire, as in the conventional case. Inserted into the inserted hole.

  Temperature data inside the tire detected by a temperature sensor composed of a thermocouple is transmitted to the wireless slave unit 45 via the lead wire 42, and from there to the wireless master unit 50 (FIG. 2B) arranged at a convenient location for monitoring. Sent.

FIG. 2 is an exploded view showing each element constituting the tire internal temperature measurement system described above.
FIG. 2A is a perspective view showing the thermocouple 40 and the wireless slave unit 45 and lead wires connecting the two, and a plurality of, for example, five thermocouples 40 are respectively connected to the common wireless slave unit 45 via the lead wires 42. It shows the connected state.
FIG. 2B is a diagram schematically showing an analyzer 55 including the wireless master device 50 and a computer. The wireless master device 50 is installed at an arbitrary position away from the wireless slave device 45, and is connected to an analysis device 55 formed of a computer. Here, as shown in FIG. 2C, the computer 55 includes a CPU 550, a ROM 551 that stores a program for performing processing such as temperature data analysis, and a RAM 552 that temporarily stores data necessary for processing such as temperature data. , A storage device 553 for storing temperature data, an input device 554 for inputting, setting, and instructing various data, and a display device 555 including an LCD (liquid crystal display device).

Here, the wireless slave unit 45 performs specific low-power wireless communication. For example, the wireless slave unit 45 employs a spread spectrum standard direct spreading method that is resistant to noise, has a radio frequency band of 2400 to 2495 MHz, and a communicable distance is indoors. 60 m, 100 m outdoors, and the sampling cycle is preferably once per second at maximum.
The wireless slave unit 45 A / D converts the temperature data obtained by the temperature sensor 40 composed of each thermocouple, and for example, identification information (slave unit identification ID number) of the wireless slave unit 45 and each thermocouple. The identification information (identification ID number of each temperature sensor 40) for each temperature sensor 40 is attached and transmitted to the wireless master device 50. The wireless master device 50 passes (transmits) the received temperature data and the like to the analysis device 55. The analysis device 55 identifies which wireless slave unit 45 is the signal from the slave unit identification ID number of the wireless slave unit 45 attached to the temperature data and corresponds to the identification ID number of the temperature sensor 40. By inputting the number to be input into the analysis device, it is determined which thermocouple each temperature data is from which temperature sensor 40, that is, which part of the tire is the temperature, and based on the temperature data, the inside of the tire Is displayed on the display device 555.

  As soon as the operator stops the tire subjected to the running test on the testing machine, the operator turns the tire to stop the tire at the position of the insertion hole, and inserts the thermocouple into the plurality of insertion holes formed on the surface of the tire. A wireless slave unit 45 connected to the other end of the lead wire is attached to the tire rim, for example, and the lead wire 42 is attached to the tire with a dedicated jig as necessary. Thereafter, the tire 12 is rotated by a predetermined angle to the position of the next insertion hole, and the temperature sensor 40 made of a thermocouple is inserted into the insertion hole. By repeating this operation, the thermocouple 40 is inserted into the insertion hole over the entire circumference of the tire to complete the preparation operation.

The detected internal temperature of the tire is transmitted from the wireless slave device 45 to the wireless master device 50 every predetermined time, for example, according to a command from the parent device 50.
The wireless master device 50 and the wireless slave device 45 are configured to be able to identify each other and communicate with each other in the same manner as commonly used, and a plurality of slave devices can be configured by one master device. Can be controlled.

The operator monitors the temperature displayed on the display device 555 and the transition of the temperature to determine whether there is an abnormality. For example, if there is a defect or insufficient insertion of a temperature sensor made of a thermocouple, the temperature sensor made of a thermocouple can be immediately replaced or reinserted.
In addition, for the presence or absence of abnormalities in temperature data, for example, the lower and upper limit values of temperature estimated from similar tires are input before measurement, and the upper and lower limit values are compared with the measured temperature data. It is also possible to determine the presence or absence of an abnormality and to display an alarm or warning when it is determined that there is an abnormality.

As described above, according to the present embodiment, the temperature sensor 40 composed of a plurality of thermocouples is connected to one wireless slave unit 45 by the lead wire 42 as one set, and the tire 12 installed in the testing machine 10 is set at a predetermined angle. By rotating and attaching each set, the operator can attach the thermocouple 40 to an arbitrary position of the tire 12 while being always in the same place.
Further, since the wireless slave unit 45 is lighter than conventional recorders and dedicated data loggers, the force for pulling out the thermocouple 40 is smaller than that of the conventional lead wire type, and the temperature sensor 40 composed of a thermocouple is provided. The risk of falling out decreases. In addition, when the length of the lead wire 42 is insufficient, the wireless slave unit 45 is lightweight, so that the lead unit 42 is fixed in a suspended state by fixing the lead wire 42 with a dedicated fixing jig. You can also

  The length of the lead wire 42 that connects the thermocouple 40 and the wireless slave unit 45 can be arbitrarily set according to the number of thermocouples 40 connected to the wireless slave unit 45 and the measurement range. Unlike the lead type temperature measurement system, it is not necessary to make the lead wire longer than 4 m. Further, since a certain range of the wireless reach can be secured indoors, when a test is performed simultaneously with a plurality of adjacent test machines 10, a radio slave unit 45 is added, and this is added to one radio master unit 50. If the wireless connection is used, the measured temperature data of the plurality of tires 12 can be centrally monitored and managed at one place.

The signal of the thermocouple 40 in this case is transmitted from the wireless slave unit 45 to the wireless master unit 50 at a measurement time interval instructed by the connected wireless slave unit 45 from the wireless master unit. When the wireless master device 50 acquires the temperature data of each thermocouple 40 from the wireless slave device 45, the wireless master device 50 transmits the temperature data to an analyzer (computer) 55 connected to the parent device 50.
The analyzer (computer) 55 is processed by a dedicated program for tire temperature measurement and displays the temperature data in a graph on the computer screen. Since the display device 555 only needs to be provided at one place, it is possible to immediately determine the abnormality and the temperature transition by monitoring the displayed temperature. Since data such as temperature is stored in a storage device, there is no transcription mistake or input mistake in the above data, and it can be used as basic data for use in other applications such as creation of experiment reports.

FIG. 3 is a flowchart showing a processing flow of measurement of the tire internal temperature according to the present embodiment.
When measuring the tire temperature, first, the tire 12 under test running is stopped (S101), and then a temperature measurement sensor is provided in a plurality of temperature measurement insertion holes formed in the surface of the tire 12. The thermocouples 40 are sequentially inserted and attached (S102). In response to a command from the wireless master device 50, the wireless slave device 45 adds the identification information (slave device identification ID number) to the temperature data transmitted from the temperature sensor 40 including a thermocouple connected to the slave device 45. And the identification information of the temperature sensor 40 which consists of a thermocouple is attached | subjected and it transmits to the wireless main | base station 50 (S103). When the wireless master device 50 receives the temperature data or the like (S104), the received temperature data or the like is then transmitted to the analyzer 55 which is a computer (S105), and the analyzer 55 obtains the obtained temperature data and each of the above-mentioned temperature data. Based on the identification information, it is determined which part of the tire 12 is the temperature data (S106), and the temperature transition information and the temperature information after the thermocouple 40 reaches the temperature equilibrium based on the temperature data obtained every predetermined time. And is displayed on the display unit together with tire position information (S107).

4 is a perspective view showing the distribution of the measurement points H of the tire temperature, and FIG. 5A shows the measurement points H of the tire (for example, the center in the width direction, ie 1/2 width, and 1/4 width from the right). FIG. 5B is a display example on the display device 555 of the analysis device 55 showing the change in the measured temperature with the lapse of time at the position measurement point), and FIG. 5B shows the maximum temperature distribution in the tire width direction.
From FIG. 5A, it is easy to see that the maximum tire temperature is 44 ° C. at the center and 42 ° C. at the right quarter width (for example, by putting a frame as shown in the figure to highlight the maximum temperature). Even if the temperature does not rise due to abnormal temperature rise or sensor failure, it can be easily discriminated by collating with other data to be measured simultaneously.
Further, from FIG. 5B, the temperature distribution of the maximum temperature in the tire width direction can be visually recognized. By comparing this temperature distribution between tires, a difference in heat generation of tires can be verified, and comparison between tires is also easy.

In order to confirm the effect of the embodiment of the present invention, the temperature measurement in the case where a plurality of measurement points are provided on the circumference of the same tire is performed using the conventional lead wire type, direct indication type and the embodiment of the present invention. Contrast.
(Example 1)
The total number of measurement points of one tire was 30 each, and the number of measurement parts was 3 in one tire circumference and 10 in the tire width direction.
In this case, there are three temperature measuring devices in the conventional lead type (referred to as the first comparative example) and 30 in the direct indication type (referred to as the second comparative example), which are the same as the measurement points. On the other hand, in Example 1, six slave units in which five temperature sensors made of thermocouples were bundled and connected by lead wires were used, and one master unit was used.
The number of personnel required for the measurement is two in the first comparative example and three in the second comparative example, whereas it is one in the example of the present invention.

Preparatory work for temperature measurement inside the tire, that is, the time required to insert the thermocouple into the thermocouple insertion hole provided on the outer periphery of the tire was 15 minutes, and no difference was recognized.
The time required for measuring the temperature was 15 minutes in the first and second comparative examples, whereas it was 10 minutes in the actual product. The data analysis time was for data input to the analyzer. Due to the time difference of the first comparative example, it was 30 minutes in the first comparative example and 60 minutes in the second comparative example. However, in this example, data collection and analysis can be performed simultaneously and automatically, and the process was completed in 15 minutes.
Therefore, the total time required for measuring the temperature inside the tire was 90 minutes in the first comparative example and 150 minutes in the second comparative example, whereas it was 40 minutes in Example 1. The risk rate of measurement failure is 1 out of 10 times (10 percent) in the first comparative example, and 3 out of 10 times (33 percent) in the second comparative example. In the example, it was once in 20 times (5 percent).
Table 1 summarizes the above results.

As described above, when measurement is performed by setting 10 measurement points at 3 locations on the circumference of the measurement tire, in the conventional technique (first comparative example), there are two workers, and at least 60 minutes are spent for measurement. In Example 1, the measurement can be completed by one person and in 40 minutes.
Therefore, it was found that measurement was possible with a small number of people, and the stop time of the testing machine could be shortened by 20 minutes compared to the first comparative example.

(Example 2)
Next, an example (Example 2) of the present invention will be described in comparison with the first and second comparative examples when the temperature inside the tire is measured simultaneously using a plurality of testing machines.
At the same time, the temperature measurement in the case where there are measurement points on the circumference of two tires was compared with the conventional lead wire type, direct indication type and Example 2.
That is, the total number of measurement points of one tire is 20, and the measurement target here is two tires. Therefore, the total number of measurement points is 20 × 2 = 40, and each measurement site is 2 per tire circumference. There are several places.

In that case, there are four temperature measuring devices in the conventional first comparative example (lead type) and 40 in the second comparative example (direct display type), which are the same as the measurement points. On the other hand, in the embodiment of the present invention, eight slave units are used and one master unit corresponding thereto is used.
In the first comparative example, the number of personnel required for the measurement is four at one person for each measurement point, and at the second comparative example, one person at each measurement point, and therefore two at each tire, for a total of four people. On the other hand, in Example 2, there are one person for each tire, that is, two persons.

Preparatory work for measuring the temperature inside the tire, that is, the time required to insert the thermocouple into the insertion hole provided on the outer periphery of the tire was 15 minutes.
The time required for measuring the temperature was 15 minutes in the first and second comparative examples, whereas it was 10 minutes in Example 2, and the data analysis time was 30 minutes in the first comparative example. × 2 = 60 minutes, and in the second comparative example, it was 60 minutes × 2 = 120 minutes, whereas in Example 2, the processing was completed in 10 minutes × 2 = 20 minutes.
Therefore, the total time required to measure the temperature inside the tire was 180 minutes in the first comparative example and 240 minutes in the second comparative example, whereas it was 80 minutes in the second example.
Table 2 summarizes the above results.

As described above, in Example 2, when temperature measurement was performed simultaneously with two test machines at 10 measurement points in the width direction at two locations on the circumference of the measurement tire, in the conventional technique 1, four people were used. Although at least 60 minutes are spent for the measurement of each testing machine, in this embodiment, the temperature data of both testing machines is measured simultaneously in 45 minutes by two people, and the measurement is completed. Even if the test is resumed until the analysis is completed, the test machine stop time can be shortened by 15 minutes for each test machine, and the test machine can be operated without being limited by time.
Even in the case of the conventional comparative example, if the test start time of one test machine is started with a delay of 60 minutes, it can be carried out by two persons, but an extra time of 60 minutes is required until the test machine is stopped, that is, the test is completed.
Also, by fixing the lead wire using a fixing jig, the connection load of the wireless slave unit is not applied and the weight of the slave unit is light, so when inserting a temperature sensor consisting of a thermocouple into a deep hole, The length of the lead wire can be supplemented by hanging the machine without fixing it.

  In the above description, both the parent device and the child device have been described as including a wireless transmission / reception device. However, the present invention is not necessarily limited thereto, and may be provided with a wired transmission / reception device depending on circumstances. Good.

It is a figure showing roughly the temperature measurement system inside the tire concerning one embodiment of the present invention. FIG. 2A is an exploded view showing each element of the temperature measurement system in the tire internal temperature measurement system, and FIG. 2A is a perspective view showing a temperature sensor composed of a thermocouple, a wireless slave unit, and lead wires connecting the two, FIG. 2B Is a diagram schematically showing a wireless master device and an analyzer (computer), and FIG. 2C is a block diagram of the analyzer (computer) serving as an analyzer. It is a flowchart for demonstrating the flow of a process of the measurement of the tire internal temperature by this embodiment. It is a perspective view which shows the measurement point of the temperature of a tire. FIG. 5A is a display example showing a change in measured temperature with the lapse of time of the tire, and FIG. 5B is a display example showing a maximum temperature distribution in the tire width direction. It is a figure which shows the conventional tire internal temperature measurement system schematically.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Test machine, 12 ... Tire, 20 ... Tire support part, 22 ... Horizontal frame, 24 ... Vertical frame, 26 ... Advance / retreat mechanism, 30 ... Drum, 40. ..Temperature sensor consisting of thermocouple, 42 ... lead wire, 44 ... recorder or dedicated data logger, 45 ... wireless slave unit, 46 ... magnet attachment / detachment plate, 50 ... wireless Master unit, 55 ... analyzer (computer).

Claims (7)

A temperature measurement system that measures the internal temperature of a tire after running in a stationary state,
A temperature sensor comprising a thermocouple for measuring the temperature inside the tire, a slave unit having communication means for transmitting temperature data detected by the temperature sensor, and a communication unit for receiving temperature data transmitted from the slave unit A base unit having an analysis device connected to the base unit,
The temperature measurement system, wherein the analysis device processes and displays temperature data input from the master unit. The temperature measurement system according to claim 1,
A temperature measurement system, wherein a temperature sensor comprising the plurality of thermocouples is connected to the slave unit via a lead wire. In the temperature measurement system according to claim 1 or 2,
The temperature measuring system, wherein the slave unit is attached to a rim of the tire via a magnet type attaching / detaching plate. The temperature measurement system according to any one of claims 1 to 3,
A temperature measurement system comprising means for fixing the lead wire to a tire between a temperature sensor comprising the thermocouple and the slave unit. The temperature measurement system according to any one of claims 1 to 4,
The temperature measurement system, wherein the master unit can communicate with a plurality of slave units mounted on the same or different tires. It is a method for measuring the internal temperature of a tire that is stopped after running,
Inserting a temperature sensor comprising a thermocouple into the tire;
A step of transmitting temperature data detected by the temperature sensor; a step of receiving the temperature data; a step of processing the received temperature data for display; and a step of displaying the processed temperature data. A temperature measurement method characterized by The temperature measuring method according to claim 6, wherein
A temperature measuring method comprising a step of attaching means for transmitting temperature data detected by a temperature sensor to the rim of the tire via a magnet type attaching / detaching plate.

Images