Filter testing in systems for capturing brake particles

Abstract

The invention relates to a system (1) for capturing brake particles from a friction brake system (10), comprising a vacuum source (20), a pneumatic circuit (30) connecting the friction brake system (10) to the vacuum source (20), and a filter (40) located on the pneumatic circuit (30) and mounted on a support (41). The capturing system (1) comprises a control unit (60) and a detection device (50) for the filter (40), the detection device being able to send at least one signal to the control unit (60), the control unit (60) being able to recognize the absence of the filter (40) based on this signal and to inform a user of the absence of the filter (40).

Description

Technical Field

[0001] The invention relates to a system for capturing brake particles from a friction brake system, comprising a vacuum source, a pneumatic circuit connecting the friction brake system to the vacuum source, and a filter located on the pneumatic circuit and mounted on a support. Background Art

[0002] Such friction brake systems may be provided for road or rail vehicles. Such friction brake systems may also be provided for fixed rotor machines such as wind turbines or industrial machines.

[0003] In such systems, a vacuum source (e.g. a suction turbine driven by a motor) connected to the friction brake system via a pneumatic circuit is provided, as is a filter for collecting particles emitted by the brake system. This filter is placed upstream of the vacuum source and prevents particles from passing through the vacuum source and being released into the atmosphere. However, in certain cases, this filter may be missing, for example because it has not been replaced during vehicle service. The absence of a filter is harmful, since particles will then pass into the vacuum source and be released into the atmosphere. The filtering function is then no longer ensured. Summary of the invention

[0004] The present invention aims to remedy these disadvantages.

[0005] The present invention aims to propose a system for capturing brake particles which makes it possible to inform the user of the vehicle of the absence of a capture system filter, so that said user can act accordingly and in particular place a filter in said system.

[0006] This object is achieved due to the fact that the capture system comprises a control unit and a filter detection device capable of sending at least one signal to the control unit capable of identifying the absence of a filter on the pneumatic circuit based on this signal and informing the user of the absence of the filter.

[0007] Thanks to these arrangements, the absence of a filter on the pneumatic circuit is detected and determined, and the user is immediately notified via the control unit. It should be noted that the control unit is able to recognize the absence of a filter on its support and the absence of a support (and its filter) on the tube. In fact, in some cases it is more practical to change the assembly consisting of a support and a filter. The user can then act accordingly and place a filter on its support, or a support (and its filter) on the tube, in order to prevent the release of harmful particles into the atmosphere.

[0008] Advantageously, the detection device comprises a pressure sensor located on the pneumatic circuit upstream of the filter, said pressure sensor being able to transmit in a signal the measured value of the pressure P1 in the pneumatic circuit upstream of the filter to the control unit, said control unit being able, upon receipt of this signal, to compare the measured pressure P1 with a reference pressure P R , the reference pressure is the reference operating state E of the vacuum source during the period when the pressure sensor measures the pressure P1 R The pressure in the pneumatic circuit in the absence of a filter, the control unit is capable of making the measured pressure P1 substantially equal to the reference pressure P R or substantially equal to atmospheric pressure to inform the user that no filter is present on the pneumatic circuit.

[0009] Therefore, in the case where the circuit or the filter support already contains a pressure sensor, it is not necessary to install an additional detection device.

[0010] Advantageously, the detection device comprises: a first pressure sensor, which is located on the pneumatic circuit upstream of the filter, the pressure sensor being capable of sending in a signal the measured value of a first pressure P1 in the pneumatic circuit upstream of the filter to the control unit; and a second pressure sensor, which is located on the pneumatic circuit downstream of the filter and is capable of sending in a signal the measured value of a second pressure P2 in the pneumatic circuit downstream of the filter to the control unit, the control unit being capable of comparing the first measured pressure P1 with the second measured pressure P2 after receiving this at least one signal, the control unit being capable of notifying a user that a filter is not present on the pneumatic circuit when the first measured pressure P1 and the second measured pressure P2 are substantially equal or when the first measured pressure P1 is substantially equal to the atmospheric pressure.

[0011] Therefore, in the case where the circuit or the filter support already contains two pressure sensors, it is not necessary to install an additional detection device.

[0012] Advantageously, the detection means comprise a contact detector capable of detecting contact between the filter and the support, said contact detector being capable of sending a signal to the control unit when no contact between the filter and the support exists, said control unit being capable of informing a user of the absence of the filter upon receipt of said signal.

[0013] Thus, the reliability of filter detection is improved.

[0014] Advantageously, the detection means comprise a contact detector capable of detecting contact between the support and the circuit, said contact detector being capable of sending a signal to the control unit when there is no contact between the support and the circuit, said control unit being capable of informing the user of the absence of the filter upon receipt of the signal.

[0015] Thus, the reliability of filter detection is improved.

[0016] Advantageously, the detection device comprises: an identifier, which is carried by the filter or the support; and a contactless detector, which is fixed close to the support and capable of detecting the presence of the identifier, the contactless detector being capable of sending a signal to a control unit when the identifier is not detected by the contactless detector, and the control unit being capable of notifying a user of the absence of the filter after receiving the signal.

[0017] It is therefore not necessary to establish an extremely precise positioning of the filter on its support: it is sufficient to mount the filter on the support.

[0018] For example, the identifier is carried by the support and the contactless detector is fixed to the tube.

[0019] For example, the identifier is carried by the filter and the contactless detector is fixed to the support.

[0020] The invention also relates to a method for detecting the absence of a filter in a system for capturing brake particles from a friction brake system, the capture system comprising a vacuum source, a pneumatic circuit connecting the friction brake system to the vacuum source, and a filter located on the pneumatic circuit and mounted on a support.

[0021] According to the present invention, the method comprises the following steps:

[0022] (a) providing a control unit and a filter detection device forming part of a capture system;

[0023] (b) the detection device sends at least one signal to a control unit;

[0024] (c) Based on this signal, the control unit recognizes that there is no filter on the pneumatic circuit and notifies the user that the filter is not present. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The invention will be better understood and its advantages will become more apparent after reading the following detailed description of embodiments presented as non-limiting examples. The description refers to the accompanying drawings, in which:

[0026] [ Figure 1 ] Figure 1 is a schematic diagram of a capture system according to the present invention,

[0027] [ Figure 2 ] Figure 2 It is the housing that carries the filter and is used to detect Figure 1 A perspective view of the filter device in the capture system,

[0028] [ Figure 3 ] Figure 3 It is the housing that carries the filter and is used to detect Figure 2 A perspective view of a variant of an embodiment of the device of the filter in the capture system,

[0029] [ Figure 4 ] Figure 4 It is the housing that carries the filter and is used to detect Figure 1 A perspective view of a second embodiment of a device for capturing a filter in a system,

[0030] [ Figure 5 ] Figure 5 It is the housing that carries the filter and is used to detect Figure 1 A perspective view of a second embodiment variant of the device for capturing the filter in the system,

[0031] [ Figure 6 ] Figure 6 It is the housing that carries the filter and is used to detect Figure 1 A perspective view of a third embodiment of a device for capturing a filter in a system,

[0032] [ Figure 7 ] Figure 7 It is the housing that carries the filter and is used to detect Figure 1 A perspective view of a variant of a third embodiment of the device for capturing the filter in the system. DETAILED DESCRIPTION

[0033] Figure 1 A particle capture system 1 according to the invention is schematically represented, the particles being discharged by a friction brake system 10 .

[0034] The friction brake system 10 includes a brake pad 11 for braking a vehicle. The pad 11 includes a backing plate 12 and a lining 13 made of a friction material fixed to the backing plate 12. Figure 1 In FIG. 1 , the pad 11 is viewed from below, with the plate 12 in the foreground.

[0035] The pad 11 (first pad) faces the disc 9, which is driven by the wheels of the vehicle. A second identical pad (not visible) is located on the other side of the disc 9 and opposite the first pad 11, so that the two pads sandwich the disc 9. When the two pads approach the disc 9, braking of the disc 9 is achieved by the friction of the two linings (13) against the disc 9.

[0036] The capture system 1 comprises a pneumatic circuit 30 and a vacuum source 20. The pad 11 and the second pad are connected to the vacuum source 20 via this pneumatic circuit 30. The vacuum source 20 comprises an electric motor 21 and a suction turbine 22 driven by this electric motor 21, for example.

[0037] During operation, the vacuum source 20 is capable of sucking in particles via the pneumatic circuit 30 after they are ejected from the liner (13). The circulation direction of air and particles during normal operation is determined by Figure 1 30 . The arrow F thus indicates a flow from upstream to downstream. The capture system 1 further comprises a filter 40, which is located on the circuit 30, which means that said filter is traversed by the air circulating in the circuit 30. This filter 40 is mounted on a support 41 fixed to the duct 30. The support 41 is, for example, a housing in which the filter 40 is housed, which, as shown in the figure, thus divides the housing 41 into an upstream part and a downstream part. The air from the upstream part of the circuit 30 enters the housing 41 at its upstream end, passes through the filter 40, and leaves the housing 41 at its downstream end, entering the downstream part of the circuit 30.

[0038] The capture system 1 further comprises a control unit 60 and a detection device 50 for detecting the filter 40. This control unit 60 and this detection device 50 are used to recognize the absence of said filter on the support 41 of the filter 40 or the absence of the support 41 on the tube 30 (and therefore the absence of the filter 40). The control unit 60 receives signals from the detection device 50 (which comprises elements for generating and transmitting these signals) and is also able to control the vacuum source 20 and receive information from it. These interactions between the control unit 60, the control device 50 and the vacuum source 20 are Figure 1 Schematically represented by solid lines in FIG. These interactions can be implemented by electrical wires. The operation of the control unit 60 and the detection device 50 is described below.

[0039] During operation of the capture system 1, the detection device 50 sends at least one signal to the control unit 60. "At least one signal" is understood to mean that a continuous signal, or a signal at regular intervals, or an isolated signal is sent when initially detecting the absence of said filter on the support 41 of the filter 40. The control unit 60 recognizes the absence of the filter 40 on the basis of this signal and then informs the user of the absence of the filter 40. This information can be provided in any way, for example by displaying a text such as "Filter missing", or a sign or indicator light on the dashboard of the vehicle and / or by stimulating the user by vibration, for example via a vibration system located in the seat and controlled by the control unit 60.

[0040] In addition, this information may be accompanied by a speed limit for the vehicle using the speed control unit 60 ( Figure 1 ) controlled restrictor 70. Thus, the generation of particles during braking is reduced, and the release of these harmful particles into the vacuum source 20 is also reduced.

[0041] References below Figure 2A first embodiment of the detection device 50 for detecting the filter 40 will be described. Figure 2 is a more detailed view of the support 41 , the filter 40 and the detection device 50 .

[0042] The detection device 50 comprises a (first) pressure sensor 51 located on the pneumatic circuit 30 upstream of the filter 40. Ideally, the pressure sensor 51 is located sufficiently close to the filter 40 so that the pressure measured by the pressure sensor 51 is equivalent to the pressure at the location where the filter 40 is located or would have been located if it was present. Thus, the pressure sensor 51 is located on the pneumatic circuit 30 close to the support 41 of the filter 40 (which makes it possible to identify the absence of the support 41) or on the support 41 of the filter 40, such as at Figure 2 “Located in the support 41 ” is understood to mean that the pressure sensor is located on the support or, if this support is a housing, in the support, and in all cases this sensor measures the pressure at the location of this support 41 .

[0043] The pressure sensor 51 is able to measure the (first) pressure P1 in the pneumatic circuit 30 upstream of the filter 40, and the detection device 50 is able to send this measurement value in a signal to the control unit 60. During this measurement, the vacuum source 20 operates according to a so-called reference operating state E R This operating state is characterized by a certain parameter, such as the rotational speed V of the suction turbine 22. Therefore, in the reference operating state E R In the process, the suction turbine 22 rotates at a speed V R The control unit 60 has a reference pressure P in the memory. R , which is the reference operating state E for the vacuum source 20 R The pressure generated in the pneumatic circuit 30 in the absence of the filter 40. It should be understood that this reference pressure P R According to this reference operating state E R Therefore, the reference pressure P R According to the rotation speed V of the turbine 22 R After receiving the signal including the pressure P1 measured in the pneumatic circuit 30, the control unit 60 compares the measured pressure P1 with the reference pressure P R For comparison. This reference pressure P R Corresponding to the reference operating state E for the vacuum source 20 R The pressure in the pneumatic circuit 30 in the absence of the filter 40 and in this reference operating state E R During this period, the first pressure P1 is measured by the pressure sensor 51. Therefore, if the first pressure P1 is substantially equal to the reference pressure P R, then this means that the filter 40 is not present on its support 41 (or the filter 40 is torn) or the support 41 (and therefore the filter 40) is not present, but the upstream part of the circuit 30 and the downstream part of the circuit 30 are connected to the place where the support 41 should be located. In fact, it should be noted that if the filter 40 is present, the pressure upstream of the filter 40 is higher than the reference pressure P R , because the filter 40 helps to prevent air from passing even when it is not clogged. Therefore, when P1 is substantially equal to P R In the case of a filter 40, the control unit 60 informs the user that there is no filter 40. "Substantially equal" is understood to mean that the pressure is within a limited interval around the reference pressure. For example, this interval is + / -1% or + / -2% or + / -5% or + / -10% of the reference pressure value.

[0044] In the reference operating state E R In the specific case where the support 41 is absent and the upstream portion of the circuit 30 is not connected to the downstream portion of the circuit 30 , the measured pressure P1 is substantially equal to the atmospheric pressure. Also, in this situation, the control unit 60 informs the user that the filter 40 is absent.

[0045] A variation of the first embodiment is described below, in which the detection device 50 includes a second pressure sensor 52 in addition to the first pressure sensor 51 . Figure 3 This variant is described in . The first pressure sensor 51 is located upstream of the filter 40 on the circuit 30. The second pressure sensor 52 is located downstream of the filter 40 on the circuit 30. The configuration in which the first sensor 51 is located upstream of the support 41 and the second sensor 52 is located downstream of the support 41 makes it possible to recognize the absence of the support 41. For example, the first sensor 51 and the second sensor 52 are located in the support 41, as shown in FIG. Figure 3. The first pressure sensor 51 is capable of measuring a first pressure P1 in the pneumatic circuit 30 upstream of the filter 40, and the detection device 50 is capable of sending this measurement in a signal to the control unit 60. In parallel, for example simultaneously, the second pressure sensor 52 is capable of measuring a second pressure P2 in the pneumatic circuit 30 downstream of the filter 40, and the detection device 50 is capable of sending this measurement in a signal to the control unit 60. For example, the measurement of the first pressure P1 and the measurement of the second pressure P2 are sent in the same signal. The control unit 60, upon receiving this signal or these signals, is capable of comparing the first pressure P1 with the second pressure P2. If the first pressure P1 is substantially equal to the second pressure P2, this means that the filter 40 is not present on its support 41 (or the filter 40 is torn) or the support 41 (and therefore the filter 40) is not present, but the upstream part of the circuit 30 and the downstream part of the circuit 30 are connected to the position where the support 41 should be located. In fact, it should be noted that if the filter 40 is present, the pressure upstream of the filter 40 is greater than the pressure downstream of the filter 40. Therefore, in the case where P1 is substantially equal to P2, the control unit 60 informs the user that the filter 40 is not present.

[0046] In the specific case during operation of the capture system, when support 41 is absent and the upstream portion of circuit 30 is not connected to the downstream portion of circuit 30 , measured pressure P1 is substantially equal to atmospheric pressure. Also, in this condition, control unit 60 informs the user that filter 40 is absent.

[0047] References below Figure 4 and 5 A second embodiment of the detection device 50 for detecting the filter 40 will be described.

[0048] The detection device 50 includes a contact detector 53. Figure 4In the first variant described in , this contact detector 53 is mounted on the support 41 so that when the filter 40 is placed in (or on) the support 41, the filter 40 is in physical contact with the contact detector 53. This physical contact is achieved, for example, by the filter 40 contacting an element that is part of the contact detector 53. For example, this element is a retractable contactor with a return (spring-loaded), wherein the retraction movement generates a signal. Alternatively, this physical contact is achieved, for example, by the cooperation between a convex element mounted on the contact detector 53 (or on the filter 40) and a concave element mounted on the filter 40 (or on the contact detector 53). The contact detector 53 is thus able to detect the contact between the filter 40 and the support 41, and therefore, is able to detect the presence of the filter 40 in (or on) the support 41. When there is no contact between the filter 40 and the support 41, which means that the filter 40 is not present on the support 41, the detection device 50 sends a signal to the control unit 60. For example, as long as the filter 40 is not present on the support 41, this signal is sent at regular intervals. The control unit 60, upon receiving this signal, informs the user that the filter 40 is not present.

[0049] exist Figure 5 In the second variant described in , the contact detector 53 is mounted on the circuit 30 upstream or downstream of the support 41, so that when the support 41 is placed on the circuit 30, the support 41 is in physical contact with the contact detector 53. This physical contact is achieved, for example, by the support 41 contacting an element that is part of the contact detector 53. Alternatively, this physical contact is achieved, for example, by the engagement between a convex element mounted on the contact detector 53 (or on the support 41) and a concave element mounted on the support 41 (or on the contact detector 53). When there is no contact between the support 41 and the tube 30, which means that the support 41 is not mounted on the tube 30 (and therefore the filter 40 is not present), the detection device 50 sends a signal to the control unit 60. For example, this signal is sent at regular intervals as long as the support 41 is not present on the tube 30. The control unit 60, after receiving this signal, informs the user that the filter 40 is not present.

[0050] References below Figure 6 and 7 A third embodiment of the detection device 50 for detecting the filter 40 will be described.

[0051] The detection device 50 comprises a contactless detector 54 and an identifier (tag) 42 carried by the filter 40 or the support 41. The contactless detector 54 is capable of detecting the presence of the identifier 42 in a specific volume V0 surrounding this detector 54. This detection is carried out, for example, using RFID technology. RFID technology groups those technologies in which the identifier is remotely powered by the detector. The contactless detector 54 is fixed close to the support 41, which means that the identifier 42 (whether carried by the filter 40 or by the support 41) is located in the volume V0 surrounding the contactless detector 54.

[0052] exist Figure 6 In the first variant described in , the contactless detector 54 is fixed to the tube 30 upstream or downstream of the support 41, and the identifier 42 is carried by the support 41. Therefore, when the support 41 is mounted on the tube 30, the contactless detector 54 is positioned at a distance D1 from the identifier 42, and the contactless detector 54 is calibrated so that if the distance between itself and the identifier 42 is greater than the distance D1, it means that if the support 41 (and therefore the filter 40) is not present on the tube 30, then the identifier 42 is not detected. In this case, the detection device 50 sends a signal to the control unit 60. For example, as long as the support 41 is not present on the tube 30, this signal is sent at regular intervals. The control unit 60 notifies the user that the filter 40 is not present after receiving this signal. In this variant, as long as the contactless detector 54 is positioned at a distance D1 from the identifier 42, the identifier 42 can be carried by the filter 40.

[0053] exist Figure 7 In the second variant described in , the contactless detector 54 is fixed to the support 41 (for example, it is placed in the housing when the support 41 is a housing), and the identifier 42 is carried by the filter 40, so that when the filter 40 is mounted on the support 41, the contactless detector 54 is positioned at a distance D2 from the identifier 42. The contactless detector 54 is calibrated so that if the distance between itself and the identifier 42 is greater than the distance D2, it means that if the filter 40 is not present on the support 41, then the identifier 42 is not detected. In this case, the detection device 50 sends a signal to the control unit 60. For example, as long as the filter 40 is not present on the support 41, this signal is sent at regular intervals. After receiving this signal, the control unit 60 notifies the user that the filter 40 is not present.

[0054] The various embodiments described above may be used alone or in combinations of two or more than two.

[0055] In certain embodiments, particularly in the third embodiment described above with the convex-concave engagement between the filter 40 mounted on the support 41 and the contact detector 53, the support 41, for example, is capable of receiving only a specific type of filter 40 (a filter 40 whose convex (or concave) element is capable of engaging with the concave (or convex) element of the contact detector 53). Therefore, it is ensured that only a specific filter 40 (for example, of a given quality or brand) is mounted on the support 41. Similarly, in the case of the convex-concave engagement between the support 41 mounted on the tube 30 and the contact detector 53, the tube 30, for example, is capable of receiving only a specific type of support 41. Therefore, it is ensured that only a specific support 41 carrying a specific filter 40 (for example, of a given quality or brand) is mounted on the tube 30.

[0056] In a fourth embodiment, the identifier 42 may be the same for any filter 40 or support 41, in which case this identifier 42 is used only to determine whether the filter 40 is present or not on the circuit 30. Alternatively, the identifier 42 may be different (via the code it contains) for each filter 40 (or each support 41) or for each type of filter 40 (or each type of support 41). In the latter case, the contactless detector 54 may be configured to detect only the identifier 42 corresponding to a specific type of filter 40 (or a support 41 carrying this type of filter 40), which makes it possible to ensure that only this type of filter 40 is installed on the tube 30.

[0057] The invention also relates to a method for detecting the absence of a filter 40 in a system 1 for capturing brake particles from a friction brake system 10. As described above, this capture system 1 comprises a vacuum source 20, a pneumatic circuit 30 connecting the friction brake system 10 to the vacuum source 20, and a filter 40 located on the pneumatic circuit 30 and mounted on a support 41. The method comprises the following steps:

[0058] (a) providing a control unit 60 which is part of the capture system 1 and a detection device 50 for detecting the filter 40;

[0059] (b) the detection device 50 sends at least one signal to the control unit 60;

[0060] (c) Based on this signal, the control unit 60 recognizes that the filter 40 is not present on the pneumatic circuit 30, and informs the user that the filter 40 is not present.

Claims

1. A capture system (1) for capturing brake particles from a friction brake system (10), comprising a vacuum source (20), a pneumatic circuit (30) connecting the friction brake system (10) to the vacuum source (20), and a filter (40) located on the pneumatic circuit (30) and mounted on a support (41), the system being characterized in that the capture system (1) comprises a control unit (60) and a detection device (50) for the filter (40), the detection device being able to send at least one signal to the control unit (60), the control unit (60) being able to recognize, based on the at least one signal, that the filter (40) is not present on the pneumatic circuit (30) and to notify a user of the absence of the filter (40), in, The detection device (50) comprises a pressure sensor (51) which is located on the pneumatic circuit (30) upstream of the filter (40), and the pressure sensor (51) is capable of transmitting the pressure P in the pneumatic circuit (30) upstream of the filter (40) in a signal. 1 The measured value is sent to the control unit (60), and the control unit (60) is able to compare the measured pressure P after receiving the signal. 1 With reference pressure P R The reference pressure is the pressure P measured by the pressure sensor (51). 1 During the reference operating state E of the vacuum source (20) R The control unit (60) is able to measure the pressure in the pneumatic circuit (30) in the absence of the filter (40), based on the measured pressure P 1 is substantially equal to the reference pressure P R or substantially equal to atmospheric pressure to inform a user that the filter (40) is not present on the pneumatic circuit (30).

2. The capture system (1) according to claim 1, It is characterized in that The detection device (50) comprises a contact detector (53) which is capable of detecting contact between the filter (40) and the support member (41). The contact detector (53) is capable of sending a signal to the control unit (60) when there is no contact between the filter (40) and the support member (41). After receiving the signal, the control unit (60) is capable of notifying a user that the filter (40) does not exist.

3. The capture system (1) according to claim 1, It is characterized in that The detection device (50) comprises a contact detector (53) which is capable of detecting contact between the support member (41) and the loop (30). The contact detector (53) is capable of sending a signal to the control unit (60) when there is no contact between the support member (41) and the loop (30). After receiving the signal, the control unit (60) is capable of notifying a user that the filter (40) is not present.

4. Capture system (1) according to any one of claims 1 to 3, It is characterized in that The detection device (50) comprises: an identifier (42) carried by the filter (40) or the support (41); and a contactless detector (54) fixed close to the support (41) and capable of detecting the presence of the identifier (42), the contactless detector (54) being capable of sending a signal to the control unit (60) when the identifier (42) is not detected by the contactless detector (54), and the control unit (60) being capable of notifying a user that the filter (40) is not present after receiving the signal.

5. Capture system (1) according to claim 4, It is characterized in that The identifier (42) is carried by the support (41), and the contactless detector (54) is fixed to the pneumatic circuit (30).

6. Capture system (1) according to claim 4, It is characterized in that The identifier (42) is carried by the filter (40), and the contactless detector (54) is fixed to the support (41).

7. A method for detecting the absence of a filter (40) in a capture system (1) for capturing brake particles from a friction brake system (10), the capture system (1) comprising a vacuum source (20), a pneumatic circuit (30) connecting the friction brake system (10) to the vacuum source (20), and a filter (40) located on the pneumatic circuit (30) and mounted on a support (41), the method being characterized in that The following steps are involved: (a) providing a control unit (60) forming part of the capture system (1) and a detection device (50) for the filter (40), the detection device (50) comprising a pressure sensor (51) located on the pneumatic circuit (30) upstream of the filter (40); (b) the pressure sensor (51) is capable of transmitting the pressure P in the pneumatic circuit (30) upstream of the filter (40) in the pressure signal. 1 The measured value is sent to the control unit (60); (c) After receiving the signal, the control unit (60) can compare the measured pressure P 1 With reference pressure P R The reference pressure is the pressure P measured by the pressure sensor (51). 1 During the reference operating state E of the vacuum source (20) R The control unit (60) is able to measure the pressure in the pneumatic circuit (30) in the absence of the filter (40), based on the measured pressure P 1 is substantially equal to the reference pressure P R or substantially equal to atmospheric pressure to inform a user that the filter (40) is not present on the pneumatic circuit (30).

Images