CN102167222A - Transmission double-chain synchronism monitoring method and device - Google Patents

Abstract

The invention discloses a method for monitoring the synchronization of transmission double chains, which includes: respectively detecting the displacement of the front end and/or rear end of each chain of the transmission double chain; and according to the detected displacement of the front end and/or rear end of each chain The displacement judges the synchronization of the transmission duplex. The invention also discloses a device for realizing the aforementioned method, which includes a detection module and a control module. The transmission double-chain synchronization monitoring method and device have high detection accuracy, high reliability of detection results and are easy to implement.

Description

Transmission double-chain synchronization monitoring method and device

technical field

The invention relates to an automobile painting production line device, in particular to a method and device for monitoring the synchronization of transmission double chains.

Background technique

At present, when car manufacturers are painting cars, most of the pre-treatment and electrophoresis production lines use the method of synchronous double chains with swing bars to transport the car body, allowing the car body to pass through all the process tanks. The pre-treatment line is 150m long, which means that the transmission of double chains At least 300m long. When the front processing line is fully loaded, there are 22 car bodies hanging on the swing rod, and the transmission double chains will be stretched to a certain extent. In addition, after the equipment has been used for a period of time, the wear and tear of the chains on both sides is different, which may cause the chains on both sides to be out of order. Synchronize. If the deviation of the transmission chains on both sides is too large, it will cause the swing bar to be skewed, and may even cause the body to be stuck, seriously damaging the synchronous double chains. Therefore, it is particularly important to detect the synchronization, stretching amount, and broken chain of the transmission double chain in real time.

The existing monitoring methods usually use sensors to detect the feature points on the chains on both sides to ensure the synchronization of the chains on both sides. This method is not accurate enough, and it cannot achieve synchronization early warning. It meets the requirements of real-time detection of synchronization, stretching amount, and chain break warning.

Therefore, there is an urgent need to provide an improved method and device for monitoring the synchronization of transmission double chains to overcome the above-mentioned defects.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method and device for monitoring the synchronization of transmission double chains, which can accurately monitor the synchronization of transmission double chains in real time, thereby preventing failures, and the detection results are highly reliable and easy to implement.

In order to solve the above-mentioned technical problems, the present invention provides a method for monitoring the synchronization of transmission double chains, which includes: respectively detecting the displacement of the front end and/or rear end of each chain of the transmission double chain; The displacement of the front end and/or the back end determines the synchronization of the transmission double chains.

Further, the step of judging the synchronization of the transmission double chain according to the detected displacement of the front end and/or rear end of each chain specifically includes: calculating the difference between the displacements of the front ends of the two chains of the transmission double chain, and /or the difference between the displacements of the rear ends of the two chains, if the difference is less than the corresponding predetermined value, the synchronization of the transmission double chain is normal; if at least one of the difference exceeds the corresponding predetermined value, Then the synchronization of the transmission duplexes is wrong. In this way, the synchronization of the front end and/or the back end of the two chains transmitting the double chain can be judged.

Furthermore, the step of judging the synchronization of the transmission double chain according to the detected displacement of the front end and/or rear end of each chain also includes: calculating the difference between the displacement of the front end and the rear end of each chain, if If the difference values are all smaller than the corresponding predetermined value, then the synchronization of the two transmission chains is normal; if at least one of the difference values exceeds the corresponding predetermined value, then the synchronization of the two transmission chains is wrong. In this way, the stretching amount of each chain of the transmission double chain can be detected, and then conditions such as broken chain and abnormal stress can be judged, so as to further judge the synchronization of the transmission double chain.

Specifically, the step of respectively detecting the displacement of the front end and/or the rear end of each chain of the double transmission chain is realized by two pairs of rotary position encoders installed on the driving wheels at the front end and the rear end of the double transmission chain.

The present invention also provides a synchronization monitoring device for transmission double chains, which includes: a detection module and a control module, wherein the detection module is used to respectively detect the front end and/or rear end of each chain of the transmission double chain Displacement: the control module is used to judge the synchronization of the transmission double chains according to the displacement of the front end and/or rear end of each chain detected by the detection module.

Specifically, the detection module includes two pairs of rotary position encoders respectively installed on the transmission wheels at the front end and the rear end of the double transmission chain. The rotary position encoder is preferably an absolute position encoder.

Specifically, the control module includes a programmable logic controller or a computer.

Further, the detection module is connected to the control module through a fieldbus cable.

Further, the device for monitoring the synchronization of the transmission double chains further includes an alarm module, configured to send an alarm when the control module judges that the synchronization of the transmission double chains is wrong.

Compared with the prior art, the synchronization monitoring method and device of the transmission double chains of the present invention judge the synchronization of the chains on both sides of the transmission double chains by detecting the displacement of the front end and the rear end of the transmission double chains, which is simple and convenient, with high detection accuracy and high detection accuracy. The results are highly reliable and easy to implement.

The present invention will become clearer through the following description in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention.

Description of drawings

FIG. 1 is a schematic structural diagram of an embodiment of a method for monitoring synchronization of transmission double chains according to the present invention.

Fig. 2 is a structural block diagram of an embodiment of a device for monitoring synchronization of transmission double chains according to the present invention.

FIG. 3 is a schematic diagram of the structure and usage status of the transmission double-chain synchronization monitoring device shown in FIG. 2 .

Detailed ways

Embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals represent like elements. As mentioned above, the present invention provides a method and device for monitoring the synchronization of transmission double chains, which can accurately monitor the synchronization of transmission double chains in real time, thereby preventing failures, and the detection results are highly reliable and easy to implement.

The technical solutions of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. As shown in FIG. 1 , the method for monitoring synchronization of transmission double chains in this embodiment includes the following steps.

Step 201: Detect the displacement of the front end and the rear end of each chain of the transmission double chain respectively. Specifically, this step can be realized by a position encoder, which has a simple method and high measurement accuracy. This step can also be realized by means of a coding ruler and the like. Optionally, it is also possible to detect only the displacement of the front end or the rear end of each chain of the transmission double chain.

Step 202: Judging the synchronization of the two transmission chains according to the detected displacement of the front end and rear end of each chain.

Further, this step includes: calculating the difference between the displacements of the front ends of the two chains of the transmission double chain, and the difference between the displacements of the rear ends of the two chains, if the differences are smaller than the corresponding predetermined value, the transmission The synchronization of the two chains is normal; if at least one of the difference values exceeds a corresponding predetermined value, then the synchronization of the transmission double chains is wrong.

Furthermore, this step also includes: calculating the difference between the displacements of the front end and the rear end of each chain, if the difference is smaller than the corresponding predetermined value, then the synchronization of the transmission double chain is normal; if the difference If at least one of the values exceeds a corresponding predetermined value, the synchronization of the transmission duplex is faulty. Specifically, by calculating the difference between the front and rear displacements of each chain, it is judged based on the difference whether the stretching is abnormal, or whether there is a chain stuck or a broken chain, because once a chain on one side gets stuck or broken , the difference between the front and rear displacements of the side chain will exceed the predetermined value in an instant, and an alarm will be generated immediately.

Fig. 2 shows a structural block diagram of an embodiment of the device for monitoring the synchronization of transmission double chains in the present invention. As shown in FIG. 2 , the device for monitoring synchronization of transmission double chains in this embodiment includes a detection module 21 and a control module 22 . Wherein, the detection module 21 is used to respectively detect the displacement of the front end and/or the rear end of each chain of the transmission double chain; the control module 22 is used to detect the front end of each chain according to the detection module 21 and/or the displacement of the back end to determine the synchronization of the transmission double chain.

Further, the device for monitoring the synchronization of the transmission double chains may further include an alarm module, configured to send an alarm when the control module 22 judges that the synchronization of the transmission double chains is wrong. The alarm module can be a buzzer, an indicator light, etc., which are well known to those skilled in the art, and a detailed description is omitted here.

Specifically, the detection module 21 includes two pairs of rotary position encoders respectively installed on the transmission wheels at the front end and the rear end of the transmission double chain; the rotary position encoders can be installed on the transmission shaft of the transmission wheels; The rotary position encoder is preferably an absolute position encoder with high detection accuracy. The control module includes a programmable logic controller or a computer. The detection module 21 is preferably connected to the control module 22 through a field bus cable, such as InterBus bus, Profibus bus, etc. Obviously, the position encoder here is a bus type encoder. If the position encoder is an ordinary encoder, that is, a non-bus encoder, a high-speed counting card can be added to the control module 22 for pulse counting, but this method is more complicated to configure and costs more.

The installation method and working principle of the transmission double-chain synchronization monitoring device of the present invention will be described below with reference to FIG. 3 . The mechanical structure of the transmission double chain in the painting workshop is shown in Figure 3. For the sake of illustration, the right side of the figure is the front end, and the left side is the rear end. The transmission double chain 100 is driven by the drive station on the front tower, and the U-shaped swing bar 200 is driven to run with the transmission double chain 100. The front and rear two sets of U-shaped swing bar transport sleds 300 and the body on the sled also move forward accordingly, passing through the front Processing, electrophoresis lines. The first position encoder and the second position encoder are installed on the transmission wheel 500 at the front end of the transmission double chain 100, and the third position encoder and the fourth position encoder are installed on the driving wheel 500 at the rear end of the transmission double chain 100. On the wheel 400, the first position encoder and the third position encoder are installed on the driving wheel of the same chain, and the second position encoder and the fourth position encoder are installed on the driving wheel of the same chain. When the transmission double chain 100 starts, the four sets of position encoders start counting at the same time, the count values of the third position encoder and the fourth position encoder at the rear end are subtracted, and the count values of the first position encoder and the second position encoder at the front end The counted values are subtracted, and the resulting difference is greater than a predetermined value (such as 800 pulses), that is, a synchronization error alarm is output; if the obtained difference is smaller than the predetermined value (such as 800 pulses), it means that the transmission duplex chain 100 is operating normally.

The transmission double-chain synchronization monitoring method and device of this embodiment detect the displacement of the front end and the rear end of each chain of the transmission double chain through a position encoder, and then judge the synchronization of the front end and the rear end of the two chains according to the displacement difference, and The stretching amount of each chain, whether there is chain jamming, chain breakage and other conditions, the detection accuracy is high, and the detection method is simple and reliable. In addition, its wiring is simple and easy to maintain.

Claims (10)

1. A transmission double-chain synchronization monitoring method, characterized in that, comprising: Detecting the displacement of the front end and/or the rear end of each chain of the transmission double chain respectively; and judging the synchronization of the transmission double chain according to the detected displacement of the front end and/or the rear end of each chain. 2. transmission double-chain synchronism monitoring method according to claim 1, is characterized in that, the described step of judging the synchronicity of described transmission double-chain according to the displacement of the front end and/or rear end of each chain detected include: Calculate the difference between the displacements of the front ends of the two chains of the transmission double chain, and/or the difference between the displacements of the rear ends of the two chains, if the difference is less than the corresponding predetermined value, the synchronization of the transmission double chain is normal ; If at least one of the difference values exceeds a corresponding predetermined value, the synchronization of the transmission duplex chain is wrong. 3. transmission double-chain synchronicity monitoring method according to claim 2, is characterized in that, the described step of judging the synchronicity of described transmission double-chain according to the displacement of the front end and/or rear end of each chain detected include: Calculate the difference between the displacement of the front end and the rear end of each chain, if the difference is less than the corresponding predetermined value, then the synchronization of the transmission double chain is normal; if at least one of the differences exceeds the corresponding predetermined value value, the synchronization error of the transmission duplex. 4. according to claim 1 or 2 or 3 described transmission double chain synchronicity monitoring methods, it is characterized in that, the step of the displacement of the front end and/or rear end of each chain of described detection described transmission double chain respectively is installed Two pairs of rotary position encoders on the transmission wheels at the front end and the rear end of the transmission double chain are realized. 5. A transmission double-chain synchronization monitoring device, characterized in that, comprising: a detection module, configured to respectively detect the displacement of the front end and/or the rear end of each chain of the transmission double chain; and The control module is used for judging the synchronization of the two transmission chains according to the displacement of the front end and/or the rear end of each chain detected by the detection module. 6 . The synchronization monitoring device of the transmission double chain according to claim 5 , wherein the detection module includes two pairs of rotary position encoders respectively installed on the transmission wheels at the front end and the rear end of the transmission double chain. 7 . 7. The device for monitoring synchronization of transmission double chains according to claim 6, wherein the rotary position encoder is an absolute position encoder. 8. The transmission double-chain synchronization monitoring device according to any one of claims 5-7, characterized in that it also includes an alarm module for when the control module judges that the synchronization of the transmission double-chain is wrong , an alarm is issued. 9. The transmission double-chain synchronization monitoring device according to any one of claims 5-7, wherein the control module comprises a programmable logic controller or a computer. 10. The transmission double-chain synchronization monitoring device according to any one of claims 5-7, wherein the detection module is connected to the control module through a field bus cable.

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