Emissions measuring device with self-test function

Abstract

To simplify the emission measurement unit self-test, a self-test unit (20) is provided, and a first connection portion (21, 21a) of the coupling is disposed in the self-test unit (20); The second connection part (22) of the coupling is arranged at the probe tip (2) of the exhaust gas probe (1), and It is contemplated that the second connection (22) of the probe tip (2) is connectable with the first connection (21, 21a) of the self-test unit (20) in order to perform a self-test.

Description

Technical Field

[0001] The present invention relates to an emission measurement device having a self-test function, and to an emission measurement device in which an exhaust pipe connected to an emission measurement unit via a measurement pipe of the emission measurement device is connected, and an exhaust gas probe for collecting exhaust gas is provided at an end of the exhaust pipe remote from the emission measurement device. The present invention also relates to a method of performing a self-test with such an emission measurement device.

Background Art

[0002] For example, emission measurement devices for measuring exhaust gas emissions from internal combustion engines or industrial processes, such as hydrocarbons (HC), carbon monoxide (CO), carbon dioxide (CO2), nitrogen oxides (NOx), particulate matter, etc., are well known. Such emission measurement devices are known in a wide variety of designs and with a wide variety of known measurement principles. All emission measurement devices use an exhaust gas probe to collect exhaust gas from the exhaust stream and supply it to the emission measurement device, where the collected exhaust gas is adjusted as necessary (e.g., moisture separation, removal of volatile substances, etc.) and diluted as necessary (e.g., in a dilution tunnel) and can be supplied to one or more measurement stages. The exhaust gas probe is usually inserted directly into the exhaust pipe of a vehicle and fixed in position, for example by a fixed clamp, during the measurement process.

[0003] Regular self-testing is necessary to ensure the proper operation of the emissions measuring device. This can be adjusted, for example, by zeroing (initialization) using a zero gas (a pure gas free of emission components, e.g., filtered ambient air) to set the zero point of measurement, or by calibration using a calibration gas (a gas containing defined emission components). Leak tests of the probe system (exhaust gas probe with exhaust pipes leading to the exhaust gas measuring device) or the entire gas path within the exhaust gas measuring device should also be performed regularly. It is particularly advantageous if both adjustment and leak testing can be performed as easily as possible, especially in workplace use and when used by maintenance personnel.

[0004] Patent Document 1 describes a method for providing a shut-off valve capable of blocking the exhaust pipe within the measurement probe's area. For a leak test, the exhaust pipe is filled with exhaust gas, the concentration of emission components in the exhaust gas is measured, and then the shut-off valve is closed. Subsequently, the emission components are continuously measured for a certain period. If there is a change in the monitored emission components, a leak is detected. In this case, a drawback is that the exhaust gas probe for leak testing in automobiles must be placed inside the exhaust tailpipe, and the internal combustion engine must also be running. However, leak tests are often performed only once a day, for example, at the start or end of business hours in a workshop. Therefore, there is not always an automobile available to perform the test. Furthermore, it is inconvenient that the exhaust gas probe must be placed separately in the exhaust gas flow for this test. While it is possible to perform a leak test before measuring specific emissions, it is often forgotten during normal use of emission measuring devices in workshops, etc., and is therefore unreliable. Separately, adjustments (zero point adjustment, calibration) cannot be performed in this manner. Furthermore, placing a valve in the probe tip region, which is susceptible to high temperatures and contamination, is considered disadvantageous. The valve would need to be designed specifically for these unfavorable conditions, increasing labor and cost.

[0005] Therefore, it has already been considered to place a particle filter (EPA filter) or particulate filter (HEPA filter) on the exhaust gas probe and use it to perform measurements with an emissions measuring device. In this way, zero-point adjustment can be performed using filtered ambient air. Similarly, the exhaust gas probe can be connected to a gas cylinder containing calibration gas to perform calibration. For leak testing, the exhaust gas probe is closed with a sealing plug, and negative pressure is generated, after which the pressure rise is monitored. If the pressure rises too quickly, a leak can be assumed. However, the placement of the filter, connection to the calibration gas, and use of the sealing plug are all cumbersome and make handling the emissions measuring device more difficult. In particular, this requires separate parts, and these parts are often misplaced or lost during the normal operation of the emissions measuring device, especially during workroom operation. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] European Patent Application Publication No. 530566 [Patent Document 2] International Publication No. 2015 / 044256 [Patent Document 3] German Patent Application Publication No. 1020151108586 Specification [Overview of the project] [Problems that the invention aims to solve]

[0007] Therefore, the object of the present invention is to simplify the self-testing of the waste measurement device. [Means for solving the problem]

[0008] This problem is solved by providing a self-test unit on which the first connecting portion of the joint is located. This is resolved by positioning the second connection of the fitting at the tip of the exhaust gas probe, and ensuring that the second connection at the probe tip is connectable to the first connection of the self-test unit for performing a self-test. This dual function of the probe tip of the exhaust gas probe—on the one hand, collecting exhaust gases, and on the other hand, as part of the fitting—makes self-testing extremely easy. Therefore, only the first connection at the probe tip needs to be connected to the first connection of the self-test unit. The self-test unit possesses all other features necessary for performing self-tests, particularly leak tests and / or zero-point adjustments or calibrations. No additional parts or components need to be handled for the self-test.

[0009] In the first modified example, the probe tip of the exhaust gas probe is manufactured as a second connecting portion. In other words, the second connecting portion and the probe tip are manufactured as a single unit or form a common component, with the second connecting portion being the probe tip.

[0010] When measuring vehicle exhaust gases, the exhaust gas probe can easily become contaminated during use. Therefore, in the second modification, the second connector is detachably positioned at the probe tip. In other words, the second connector can be detachably connected to the exhaust gas probe. As a result, the second connector can be easily removed for cleaning or replacement. Different types of connectors can also be attached to the exhaust gas probe via this detachable connector. This can be particularly advantageous during equipment testing by a third party. Such equipment testing may include, for example, verification by a weights and measures verification bureau or calibration in a calibration laboratory.

[0011] A particularly easy-to-handle and compact emission measuring device can be achieved when the self-test unit is integrated into the emission measuring device. Alternatively, the self-test unit may be provided as a separate component of the emission measuring device, having its own housing.

[0012] For a secure connection, it is advantageous to have a first locking part on the first connecting part and a second locking part on the second connecting part. In this case, when the first and second connecting parts are connected to each other to establish a joint, the first and second locking parts cooperate to lock the first and second connecting parts together. In this way, unintended loosening of the joint can be prevented as much as possible.

[0013] A leak test as a self-test can be easily performed when one end of the first connection is closed within the self-test unit. This makes it easy to generate negative or positive pressure in the probe system for leak testing.

[0014] If the first connection point within the self-test unit is connected to the gas inlet of the self-test unit via a self-test line, zeroing, adjustment, or calibration can be easily performed. If a filter is placed in the self-test line between the first connection point and the gas inlet, ambient air can be advantageously used for zeroing.

[0015] A self-test line is provided in the self-test unit, with a first connector connected to the gas inlet of the self-test unit, and a valve is located between the first connector and the gas inlet in the self-test unit, allowing both self-tests to be easily performed by closing the self-test line to perform a leak test or opening the self-test line to perform zero-point adjustment or calibration, depending on the position of the valve.

[0016] To perform a leak test, preferably, the measurement pipe is provided with a supply pump capable of generating a negative pressure or a positive pressure and a pressure sensor. This pressure sensor is connected to the control unit of the exhaust measurement unit, and the control unit evaluates the time-dependent profile of the pressure in the measurement pipe. When the change in pressure over time exceeds a predetermined limit value, the control unit detects a leak in the probe system. Since the supply pump and the pressure sensor are often installed in the exhaust gas measurement device, these components can also be used to easily perform a leak test.

[0017] The supply pump that is normally present in the exhaust measurement unit can advantageously also supply gas to the exhaust measurement unit for measuring exhaust gas through a gas inlet, a self-test line, a first connection, an exhaust gas probe, and an exhaust pipe in order to perform zero adjustment, regulation, or calibration.

[0018] Hereinafter, the present invention will be described in detail with reference to FIGS. 1 to 4, which schematically illustrate preferred configurations of the present invention without limitation.

Brief Description of the Drawings

[0019] [Figure 1] An exhaust gas measurement device of the present invention having a self-test function is shown. [Figure 1a] An exhaust gas measurement device having an external self-test unit is shown. [Figure 2] An exhaust gas probe of the present invention having a joint connection is shown. [Figure 3] A complementary connection of the self-test unit is shown. [Figure 4] An exhaust gas probe having a spacer is shown.

Modes for Carrying Out the Invention

[0020] Figure 1 schematically shows an exhaust gas measuring device 10 having an exhaust pipe 4, and an exhaust gas probe 1 is disposed at an end of the exhaust pipe. The exhaust gas probe 1 is inserted into an end pipe of an automobile exhaust system by, for example, a known method in order to remove exhaust gas from the end pipe. For this purpose, the exhaust gas probe 1 has at least one opening in a region of the probe tip 2 through which the exhaust gas can flow into the exhaust gas probe 1. The exhaust gas probe 1 is provided with a flow path connected to the opening and the exhaust pipe 4 for guiding the collected exhaust gas to the exhaust pipe 4. The exhaust pipe 4 can be disposed at an end of the exhaust gas probe 1 on the side opposite to the probe tip 2.

[0021] The collected exhaust gas is guided through the exhaust pipe 4 to an exhaust gas inlet connection 13 of the exhaust gas measuring device 10. A measuring pipe 14 for the exhaust gas guides from the exhaust gas inlet connection 13 to a measuring unit 12 where the intended treatment and exhaust gas measurement are carried out. Generally, in the measuring unit 12, flow control is also performed to provide a specific amount of exhaust gas for the exhaust gas measurement.

[0022] In the measuring pipe 14, a supply pump 11 (for example, a suction pump) is provided through which the exhaust gas is supplied through the measuring unit 12. The exhaust gas supplied through the exhaust gas measuring device 10 can be discharged at an exhaust gas outlet connection 15 (for example, carried to the periphery or to the suction part). A control unit 16 is disposed in the exhaust gas measuring device 10, and this control unit 16 controls and monitors the functions of the exhaust gas measuring device 10, particularly adjusts the supply pump 11 and controls the measuring unit 12. The normal structure of the exhaust gas measuring device 10 is well known, and since this is particularly irrelevant to the present invention, it will not be described in detail here. Possible (but not limited to) embodiments of the exhaust gas measuring device 10 are described, for example, in Patent Document 2.

[0023] The control unit 16 is typically implemented as processor-based hardware, such as a microcontroller, computer, or programmable logic controller. However, the control unit 16 can also be implemented as an integrated circuit, such as an application-specific integrated circuit (ASIC) or a field-programmable gate array (FPGA). An embodiment as an analog electrical circuit is also possible. Similarly, combinations of the above embodiments are conceivable.

[0024] To enable a simple self-test of the discharge measuring device 10, a self-test unit 20 is provided according to the present invention. In the embodiment shown in Figure 1, the self-test unit 20 is integrated with the discharge measuring device 10, but it can be run separately from the discharge measuring device 10, i.e., as a separate component (as shown in Figure 1a). The self-test unit 20 may have its own control unit, but if control is required, it can also be controlled by the control unit 16 of the discharge measuring device 10.

[0025] The self-test unit 20 includes a first connecting portion 21 of the fitting. A second connecting portion 22 of the fitting is formed by the exhaust gas probe 1. For example, the first connecting portion 21 is a coupling socket, and the second connecting portion 22 is a coupling plug, which is inserted into the coupling socket to establish a connection, or vice versa. Thus, the exhaust gas probe 1 has a dual function according to the present invention, namely, on the one hand, collecting exhaust gas from the exhaust gas flow to be tested, and on the other hand, forming a connecting portion of the fitting to establish a connection with the self-test unit 20. The second connecting portion 22 of the exhaust gas probe 1 can be connected to the first connecting portion 21 of the self-test unit 20, for example, by inserting it into it. The self-test function is implemented, at least in part, in the self-test unit 20.

[0026] To form the second coupling portion 22, the probe tip 2 of the exhaust gas probe 1 can be formed in the shape of the second coupling portion 22. Thus, the second coupling portion 22 is integrated with the exhaust gas probe 1. However, the probe tip 2 of the exhaust gas probe 1 can also be detachably connected to the second coupling portion 22. For example, the probe tip 2 can be inserted into a recess of a coupling adapter that forms the second coupling portion 22. In this way, the exhaust gas probe 1 can be easily fitted with different second coupling portions 22. Of course, the second coupling portion 22 can be removed, but nevertheless, it is connected to the exhaust gas probe so that it is securely held to the exhaust gas probe 1 during use. For example, a coupling adapter with a second coupling portion 22 can be screwed onto or into the probe tip 2, in which case any other detachable friction-engaged or shape-engaged connections are also possible.

[0027] In the embodiment shown in Figures 1 and 1a, a gas inlet 23 is provided in the self-test unit 20, which can be fluidly connected to the first connection 21 by a self-test line 26. As a result, gas can flow from the gas inlet 23 to the first connection 22 and from there to the exhaust gas probe 1, as long as the second connection 22 of the exhaust gas probe 1 is connected to the first connection 21. A filter 24, for example, a HEPA filter, and a control valve 25 can be placed within the self-test line 26. For example, ambient air can be supplied to the gas inlet 23. In this case, the filter 24 is provided to perform zero-point adjustment of the exhaust measuring device 10 using filtered ambient air, as will be further described below. However, a specific gas can also be connected to the gas inlet 23 (for example, by a gas cylinder) to supply a calibration gas or regulating gas via the gas inlet 23. In this case, the filter 24 is not necessarily required.

[0028] For example, a control valve 25, implemented as a switching valve (e.g., a 2 / 2 directional valve), is provided to open or close the flow through the self-test line 26. When the flow is open, the gas inlet 23 is connected to the first coupling 21, and gas can flow from the gas inlet 23 to the first coupling 21. When the flow is closed, the probe system (exhaust gas probe 1 and exhaust pipe 4) can perform a leak test as described below. If a leak test is not performed, the controllable valve 25 may be omitted. The controllable valve 25 can be switched manually from the outside, or it can be controlled for switching by the control unit 16 of the emissions measuring device 10 or the control unit of the self-test unit 20.

[0029] For example, a user interface 17 can be provided on the waste measurement device 1, through which the functions of the waste measurement device 10 can be managed, and a self-test can also be initiated. For this purpose, the user interface 17 can be provided with appropriate input / output units such as buttons, sliders, rotary knobs, keys, keyboards, mousepads, displays, and touchscreens.

[0030] The exhaust gas probe 1 according to the present invention, as shown in Figure 2, has a probe tip 2 at a first axial end and a mounting section 3 for an exhaust pipe 4 at the opposite axial end. The exhaust pipe 4 is appropriately positioned in the mounting section 3 of the exhaust gas probe 1. However, how this arrangement is actually implemented is irrelevant to the present invention and therefore a detailed description is omitted. However, the exhaust pipe 4 can also be connected to the exhaust gas probe 1 in a different way.

[0031] As shown in Figure 3, the first coupling portion 21 of the self-test unit 20 is constructed to have a first locking portion 6. The probe tip 2 is constructed as a second coupling portion 22 having a second locking portion 5, as shown in Figure 2. The first coupling portion 21 and the second coupling portion 22 can be removably joined when in use, so that the first locking portion 5 and the second locking portion 6 are removably engaged, and the two coupling portions 21 and 22 are held in place of each other, and an airtight connection is established. To separate the joint, the locking components 5 and 6 are removed in the intended manner, thereby separating the coupling portions 21 and 22. The second locking portion 5 can be provided on the second coupling portion 22 even if the second coupling portion 22 is designed on a separate coupling adapter that is removably connected to the probe tip 2.

[0032] If a removable connection between the first connecting portion 21 and the second connecting portion 22 can be established without locking, depending on the design of the joint, then the first and second locking portions 5 and 6 can also be omitted.

[0033] Preferably, the first connecting portion 21 is designed as the female part of a joint, and the second connecting portion 22 is designed as the male part of a coupling.

[0034] The first connecting portion 21 and the second connecting portion 22 can be designed, for example, as a quick disconnect (according to ISO 6150 B or C), and of course, any other design is possible. For example, the joint (consisting of the first connecting portion 21 and the second connecting portion 22) can be designed as a known threaded connector, clamp connector, plug connector, bayonet connector, etc., corresponding to the connecting portions 21 and 22 and, if necessary, the locking portions 5 and 6.

[0035] In the illustrated embodiment, the coupling is designed as a quick disconnect. The probe tip 2 is designed as a coupling plug (male) that, in the illustrated embodiment, is inserted into the first coupling 21, which is designed as a coupling socket (female) to establish a connection, as a second coupling 22. The second coupling 22 has a first locking portion 5 in the form of a circumferential groove 7 at the cylindrical end of the probe tip 2. To lock, a fixed body 8, for example, a sphere distributed around the circumference, engages with the first coupling 21 in this circumferential groove 7. The fixed body 8 forms a first locking portion 6. The fixed body 8 can be released or locked radially via a sliding sleeve 9 that is axially displaceable on the first coupling 21. When the fixed body 8 is released by the position of the sliding sleeve 9, the second coupling 22 can be inserted into or removed from the first coupling 21. When the fixed body 8 is locked radially by the sliding sleeve 9, the second connecting portion 22 is fixed to the first connecting portion 21.

[0036] To perform zero-point adjustment, adjustment, or calibration, the exhaust gas probe 1 is connected to the first connection 21 of the self-test unit 20 via the second connection 22. Thus, a flow path is formed from the gas inlet 23 through the self-test line 26 to the exhaust gas probe 1 and the exhaust pipe 4. Thus, gas, such as filtered ambient air or calibration / adjustment gas, can be supplied to the measuring unit 12 via the supply pump 11 of the emission measuring device 10 for zero-point adjustment, adjustment, or calibration. If necessary (if present), a switchable valve 25 is switched so that the first connection 21 is connected to the gas inlet 23. This can be done automatically by the control unit 16, for example, by selecting to perform zero-point adjustment, adjustment, or calibration in the user interface.

[0037] For a leak test, the exhaust gas probe 1 is connected to the first connection 21 of the self-test unit 20 by a second connection 22. A switchable valve 25 is switched so that the first connection 21 is not connected to the gas inlet 23. This can be done automatically by the control unit 16, for example, by selecting to perform a leak test in the user interface. The supply pump 11 can generate negative or positive pressure in the connected probe system (exhaust probe 1 with exhaust pipe 4) (depending on the type of pump and pump control). Depending on the placement of the supply pump 11 in the measuring pipe 14, the airtightness of the portion of the measuring pipe 14 located upstream of the supply pump 11, and possibly the airtightness of the components of the exhaust measurement unit 12, are also checked. After the supply pump 11 is switched off, the pressure profile over time can be checked. It can be intended that the supply pump 11 seals at the outlet side when switched off, so that no pressure rise occurs through the exhaust gas outlet connection 15. For example, commercially available diaphragm pumps provide this function.

[0038] Instead of using the supply pump 11, negative or positive pressure for leak testing can also be achieved by connecting the probe system to an external vacuum line or positive pressure line, preferably. For example, a compressed air line is often present in the workplace to which a self-test unit 20 or an emissions measuring device 10 can be connected. In the self-test unit 20, the probe system can then be connected to a vacuum line or positive pressure line via a valve and first couplings 21, 21a. Alternatively, as shown by the dashed line in Figure 1a, the measuring tube 14 of the emissions measuring device 10 can be connected to such an external vacuum line or positive pressure line 28 via a valve 29. For example, the first couplings 21, 21a can preferably be connected to such a vacuum line or positive pressure line via a valve. Such a valve also closes the ends of the first couplings 21, 21a in order to perform a leak test after the probe system has been connected to the vacuum line or positive pressure line and the pressure present therein. However, it is also conceivable that the emissions measuring device 10 itself has a negative or positive pressure line. In that case, a probe system can be connected to such a line to perform a leak test.

[0039] For leak testing, the pressure sensor 18 can be placed, for example, in the measuring tube 14 within the discharge measuring device 10, preferably upstream of the supply pump 11. The control unit 16 can read the pressure sensor 18 at predetermined time intervals and evaluate the pressure profile over time. If the pressure changes significantly over time (which can be set within the control unit 16), a leak is detected. For this purpose, a limit value for the pressure change over time can be specified, and it can be checked whether the pressure change over time exceeds the limit value within a certain period. The results of the leak test can be transmitted via the user interface 17.

[0040] Instead of the switchable valve 25, it is also conceivable to provide two first connecting sections 21, 21a on the self-test unit 20, as shown in Figure 1a. One of these is closed at the end of the connecting section 21a to perform a leak test. Alternatively, this first connecting section 21a can be connected to an external vacuum line or positive pressure line via a valve. The other is connected to a self-test line 26 with a gas inlet 23. The switchable valve 25 for switching between leak testing and calibration / adjustment is not required for this purpose. To perform the self-test, the exhaust gas probe 1 must be connected to the correct first connecting sections 21, 21a.

[0041] For example, to position and hold the exhaust gas probe 1 within the end pipe of the exhaust system, a spacer 27 can be positioned on the exhaust gas probe 1 in a known manner (as shown in Figure 4). Possible designs for the spacer 27 are also described in Patent Document 3. However, a separate retaining device for the exhaust gas probe 1 can also be provided (additionally or alternatively) within the end pipe, as described in Patent Document 2, for example. Furthermore, this application also includes the following aspects from other perspectives. 1. A waste measurement device equipped with a self-test function, The exhaust gas measuring device (10) is connected to an exhaust pipe (4) which is connected to an exhaust gas measuring unit (12) via a measuring tube (14) inside the exhaust gas measuring device (10), and an exhaust gas probe (1) for collecting exhaust gas is provided at the end of the exhaust pipe (4) that is away from the exhaust gas measuring device (10). In the said waste measurement device, A self-test unit (20) is provided, and the first connecting portion (21, 21a) of the joint is positioned on the self-test unit (20). The second connecting portion (22) of the joint is positioned at the probe tip (2) of the exhaust gas probe (1), and To perform a self-test, the second connecting portion (22) of the probe tip (2) can be connected to the first connecting portion (21, 21a) of the self-test unit (20). A discharge measuring device characterized by the following features. 2. The probe tip (2) of the exhaust gas probe (1) is manufactured as the second connecting part (22). The discharge measuring device according to item 1 above, characterized in that it is a device for measuring discharges. 3. The second connecting portion (22) is detachably positioned on the probe tip (2). The discharge measuring device according to item 1 above, characterized in that it is a device for measuring discharges. 4. The self-test unit (20) is integrated with the waste measurement device (10). A waste measuring device according to any one of the above 1 to 3, characterized in that it is a waste measuring device. 5. The first connecting portion (21, 21a) is provided with a first locking portion (6), and the second connecting portion (22) is provided with a second locking portion (5). When the first connecting portion (21, 21a) and the second connecting portion (22) are connected to each other to establish a joint, the first locking portion (6) and the second locking portion (5) cooperate to lock the first connecting portion (21, 21a) and the second connecting portion (22). A waste measuring device according to any one of the above 1 to 4, characterized in that it is a waste measuring device. 6. One end of the first connecting portion (21, 21a) in the self-test unit (20) is closed in order to perform a leak test. A waste measuring device according to any one of items 1 to 5 above, characterized in that it is a waste measuring device. 7. To perform zero point adjustment, adjustment, or calibration, a first coupling (21) within the self-test unit (20) is connected to the gas inlet (23) of the self-test unit (20) via a self-test line (26). A waste measuring device according to any one of items 1 to 5 above, characterized in that it is a waste measuring device. 8. The filter (24) is located in the self-test line (26) between the first connecting section (21) and the gas inlet (23). The discharge measuring device according to item 7 above, characterized in that it is a discharge measuring device. 9. One self-test line (26) is provided in the self-test unit (20), This self-test line (26) connects the first connecting portion (21) to the gas inlet (23) of the self-test unit (20), and the self-test unit (20) has a controllable valve (25) between the first connecting portion (21) and the gas inlet (23). Depending on the position of this valve (25), the self-test line (26) is closed to perform a leak test, or the self-test line (26) is opened to perform zero-point adjustment, adjustment, or calibration. A discharge measuring device according to any one of items 1 to 5 above, characterized in that it is a discharge measuring device. 10. A supply pump (11) is provided in the measuring tube (14), and in order to perform a leak test in a probe system consisting of an exhaust pipe (4) and an exhaust gas probe (1), the supply pump (11) can generate negative or positive pressure. A pressure sensor (18) is provided in the measuring tube (14), and this pressure sensor (18) is connected to the control unit (16) of the discharge measuring unit (10), and the control unit (16) evaluates the time-series profile of the pressure inside the measuring tube (14), and If the pressure change over time exceeds a predetermined limit, the control unit (16) detects a leak in the probe system. The discharge measuring device according to 6 or 9 above, characterized in that it is a device for measuring discharges. 11. The probe system, consisting of an exhaust pipe (4) and an exhaust gas probe (1), is connected to a vacuum line or a positive pressure line (28) in order to perform a leak test. A pressure sensor (18) is provided in the measuring tube (14), and this pressure sensor (18) is connected to the control unit (16) of the discharge measuring device (10), and the control unit (16) evaluates the pressure profile over time in the measuring tube (14), and If the pressure change over time exceeds a predetermined limit, the control unit (16) detects a leak in the probe system. The discharge measuring device according to 6 or 9 above, characterized in that it is a device for measuring discharges. 12. A supply pump (11) is provided in the measuring tube (14). The supply pump (11) supplies gas to the exhaust measurement unit (12) for measuring exhaust emissions via the gas inlet (23), self-test line (26), first connection (21), exhaust gas probe (1), and exhaust pipe (4) in order to perform zero point adjustment, adjustment, or calibration. The discharge measuring device according to item 7 or 9 above, characterized in that it is a discharge measuring device. 13. A method for performing a self-test of an exhaust gas measuring device (10) equipped with a self-test function, comprising preparing a self-test unit (20) equipped with a first connecting portion (21, 21a) of a joint, An exhaust gas probe (1) is prepared, which is connected to the measuring tube (14) of the exhaust gas measuring device (10) via the exhaust pipe (4), and is also connected to the exhaust measuring unit (12) which is connected to the measuring tube (14), and has a probe tip (2) provided with a second connecting part (22) of a joint for collecting exhaust gas. To perform a self-test, the second connecting portion (22) of the probe tip (2) is connected to the first connecting portion (21, 21a) of the self-test unit (20). A method characterized by the following: 14. When the first connecting portion (21, 21a) and the second connecting portion (22) are connected to each other to establish a joint, the first connecting portion (21, 21a) and the second connecting portion (22) are locked by the first locking portion (6) of the first connecting portion (21, 21a) and the second locking portion (5) of the second connecting portion (22) which interacts with the first locking portion (6). The method according to the above 13, characterized by the features described above. 15. One end of the first connection portion (21, 21a) in the self-test unit (20) is closed in order to perform a leak test. The method according to 13 or 14 above, characterized by the features described above. 16. To perform zero point adjustment, adjustment, or calibration, a first coupling (21) within the self-test unit (20) is connected to the gas inlet (23) of the self-test unit (20) via a self-test line (26). The method according to 13 or 14 above, characterized by the features described above. 17. The self-test line (26) of the self-test unit (20), which connects the first connecting section (21) to the gas inlet (23) in the self-test unit (20), is controlled by a valve (25) that can be closed to perform a leak test or opened to perform zeroing, adjustment, or calibration. The method according to 13 or 14 above, characterized by the features described above. 18. In a probe system consisting of an exhaust pipe (4) and an exhaust gas probe (1), a supply pump (11) in a measuring tube (14) generates negative or positive pressure, and The pressure is measured by the pressure sensor (18) inside the measuring tube (14). In this case, if the measured pressure changes over time and exceeds a predetermined limit, a leak in the probe system is detected. The method described in 15 or 17 above, characterized by the features described herein. 19. The probe system, consisting of an exhaust pipe (4) and an exhaust gas probe (1), connected to a measuring tube (14), is connected to a vacuum line or a positive pressure line (28) to generate negative or positive pressure, and the pressure is measured by a pressure sensor (18) inside the measuring tube (14). In this case, if the measured pressure changes over time and exceeds a predetermined limit, a leak in the probe system is detected. The method described in 15 or 17 above, characterized by the features described herein. 20. To perform zero point adjustment, adjustment, or calibration, a supply pump (11) in the measuring tube (14) supplies gas to an exhaust measurement unit (12) for exhaust measurement via a gas inlet (23), self-test line (26), first connection (21), exhaust gas probe (1), and exhaust pipe (4). The method according to 16 or 17 above, characterized by the features described above.

Claims

1. A waste measurement device equipped with a self-test function, The exhaust gas measuring device (10) is connected to an exhaust gas measuring unit (12) via a measuring tube (14) inside the exhaust gas measuring device (10), and an exhaust gas probe (1) for collecting exhaust gas is provided at the end of the exhaust gas measuring device (4) that is away from the exhaust gas measuring device (10). In the said waste measurement device, A self-test unit (20) is provided, and the first connecting portion (21, 21a) of the joint is positioned on the self-test unit (20). The second connecting portion (22) of the joint is positioned at the probe tip (2) of the exhaust gas probe (1), and In order to perform a self-test, the second connecting portion (22) of the probe tip (2) is connectable to the first connecting portion (21, 21a) of the self-test unit (20). The self-test includes leak testing, zeroing, adjustment, or calibration. A discharge measuring device characterized by the following features.

2. The probe tip (2) of the exhaust gas probe (1) is manufactured as the second connecting part (22). The discharge measuring device according to feature 1.

3. The second connecting portion (22) is detachably positioned on the probe tip (2). The discharge measuring device according to feature 1.

4. The self-test unit (20) is integrated with the waste measurement device (10). The discharge measuring device according to any one of claims 1 to 3.

5. The first connecting portion (21, 21a) is provided with a first locking portion (6), and the second connecting portion (22) is provided with a second locking portion (5). When the first connecting portion (21, 21a) and the second connecting portion (22) are connected to each other to establish a joint, the first locking portion (6) and the second locking portion (5) cooperate to lock the first connecting portion (21, 21a) and the second connecting portion (22). The discharge measuring device according to any one of claims 1 to 4.

6. One end of the first connecting portion (21, 21a) in the self-test unit (20) is closed in order to perform a leak test. The discharge measuring device according to any one of claims 1 to 5, characterized by the following:

7. In order to perform zero point adjustment, adjustment, or calibration, a first coupling (21) within the self-test unit (20) is connected to the gas inlet (23) of the self-test unit (20) via a self-test line (26). The discharge measuring device according to any one of claims 1 to 5, characterized by the following:

8. The filter (24) is located in the self-test line (26) between the first connecting section (21) and the gas inlet (23). The discharge measuring device according to feature 7.

9. One self-test line (26) is provided in the self-test unit (20), This self-test line (26) connects the first connecting portion (21) to the gas inlet (23) of the self-test unit (20), and the self-test unit (20) has a controllable valve (25) positioned between the first connecting portion (21) and the gas inlet (23). Depending on the position of this valve (25), the self-test line (26) is closed to perform a leak test, or the self-test line (26) is opened to perform zero-point adjustment, adjustment, or calibration. The discharge measuring device according to any one of claims 1 to 5, characterized by the following:

10. A supply pump (11) is provided in the measuring tube (14), and in order to perform a leak test in a probe system consisting of an exhaust pipe (4) and an exhaust gas probe (1), the supply pump (11) can generate negative or positive pressure. A pressure sensor (18) is provided in the measuring tube (14), and this pressure sensor (18) is connected to the control unit (16) of the discharge measuring unit (10), and the control unit (16) evaluates the time-dependent profile of the pressure inside the measuring tube (14), and If the pressure change over time exceeds a predetermined limit, the control unit (16) detects a leak in the probe system. The discharge measuring device according to claim 6 or 9, characterized in that it is a feature of the present invention.

11. The probe system, consisting of an exhaust pipe (4) and an exhaust gas probe (1), is connected to a vacuum line or a positive pressure line (28) in order to perform a leak test. One pressure sensor (18) is provided in the measuring tube (14), and this pressure sensor (18) is connected to the control unit (16) of the discharge measuring device (10), and the control unit (16) evaluates the pressure profile over time in the measuring tube (14), and If the pressure change over time exceeds a predetermined limit value, the control unit (16) detects a leak in the probe system. The discharge measuring device according to claim 6 or 9, characterized in that it is a feature of the present invention.

12. A supply pump (11) is provided in the measuring tube (14). The supply pump (11) supplies gas to the exhaust measurement unit (12) for measuring exhaust emissions via the gas inlet (23), self-test line (26), first connection (21), exhaust gas probe (1), and exhaust pipe (4) in order to perform zero point adjustment, adjustment, or calibration. The discharge measuring device according to claim 7 or 9, characterized in that it is a feature of the present invention.

13. A method for performing a self-test of an exhaust gas measuring device (10) equipped with a self-test function, comprising preparing a self-test unit (20) equipped with a first connecting portion (21, 21a) of a joint, An exhaust gas probe (1) is prepared, which is connected to the measuring tube (14) of the exhaust gas measuring device (10) via the exhaust pipe (4), and is also connected to the exhaust measuring unit (12) which is connected to the measuring tube (14), and has a probe tip (2) provided with a second connecting part (22) of a joint for collecting exhaust gas. To perform a self-test, the second connecting portion (22) of the probe tip (2) is connected to the first connecting portion (21, 21a) of the self-test unit (20). The self-test includes leak testing, zeroing, adjustment, or calibration. A method characterized by the following:

14. When the first connecting portion (21, 21a) and the second connecting portion (22) are connected to each other to establish a joint, the first connecting portion (21, 21a) and the second connecting portion (22) are locked by the first locking portion (6) of the first connecting portion (21, 21a) and the second locking portion (5) of the second connecting portion (22) which interacts with the first locking portion (6). The method according to the present invention, characterized by the present invention.

15. One end of the first connecting portion (21, 21a) in the self-test unit (20) is closed in order to perform a leak test. The method according to feature 13 or 14.

16. To perform zero point adjustment, adjustment, or calibration, a first coupling (21) in the self-test unit (20) is connected to the gas inlet (23) of the self-test unit (20) via a self-test line (26). The method according to feature 13 or 14.

17. The self-test line (26) of the self-test unit (20), which connects the first connecting portion (21) to the gas inlet (23) in the self-test unit (20), is controlled by a valve (25) that can be closed to perform a leak test or opened to perform zeroing, adjustment, or calibration. The method according to feature 13 or 14.

18. In a probe system consisting of an exhaust pipe (4) and an exhaust gas probe (1), a supply pump (11) in a measuring tube (14) generates negative or positive pressure, and The pressure is measured by the pressure sensor (18) inside the measuring tube (14). In this case, if the measured pressure changes over time and exceeds a predetermined limit, a leak in the probe system is detected. The method according to 15 or 17, characterized by the features described herein.

19. The probe system, consisting of an exhaust pipe (4) and an exhaust gas probe (1), connected to a measuring tube (14), is connected to a vacuum line or a positive pressure line (28) to generate negative or positive pressure, and the pressure is measured by a pressure sensor (18) inside the measuring tube (14). In this case, if the measured pressure changes over time and exceeds a predetermined limit, a leak in the probe system is detected. The method according to 15 or 17, characterized by the features described herein.

20. To perform zero-point adjustment, adjustment, or calibration, a supply pump (11) in the measuring tube (14) supplies gas to an exhaust measurement unit (12) for exhaust measurement via a gas inlet (23), a self-test line (26), a first connection (21), an exhaust gas probe (1), and an exhaust pipe (4). The method according to 16 or 17, characterized by the features described herein.

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