EP4569438A1 - Grenzwertdetektionsvorrichtung mit zähleinheit - Google Patents
Grenzwertdetektionsvorrichtung mit zähleinheitInfo
- Publication number
- EP4569438A1 EP4569438A1 EP23751882.4A EP23751882A EP4569438A1 EP 4569438 A1 EP4569438 A1 EP 4569438A1 EP 23751882 A EP23751882 A EP 23751882A EP 4569438 A1 EP4569438 A1 EP 4569438A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- detent
- detent element
- limit value
- gear
- detection device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
- G06M1/00—Design features of general application
- G06M1/08—Design features of general application for actuating the drive
- G06M1/083—Design features of general application for actuating the drive by mechanical means
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
- G06M1/00—Design features of general application
- G06M1/14—Design features of general application for transferring a condition from one stage to a higher stage
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
- G06M1/00—Design features of general application
- G06M1/14—Design features of general application for transferring a condition from one stage to a higher stage
- G06M1/16—Design features of general application for transferring a condition from one stage to a higher stage self-operating, e.g. by Geneva mechanism
- G06M1/166—Design features of general application for transferring a condition from one stage to a higher stage self-operating, e.g. by Geneva mechanism with dials, pointers or similar type indicating means
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
- G06M1/00—Design features of general application
- G06M1/22—Design features of general application for visual indication of the result of count on counting mechanisms, e.g. by window with magnifying lens
- G06M1/24—Drums; Dials; Pointers
- G06M1/245—Dials; Pointers
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
- G06M1/00—Design features of general application
- G06M1/22—Design features of general application for visual indication of the result of count on counting mechanisms, e.g. by window with magnifying lens
- G06M1/24—Drums; Dials; Pointers
- G06M1/248—Discs
Definitions
- the invention relates to a device for multiple detection of limit value events.
- limit value events are defined by the fact that a predefined threshold value is undershot or exceeded.
- These can be, for example, threshold values of a pressure, a temperature, an acceleration, a mechanical force, and the like.
- Detecting and proving such limit values that are exceeded or fallen short of in a given period of time can be important in various industrial processes.
- One of countless examples concerns, for example, critical temperature loads during product production, in the logistics chain, during product use or in general during temperature-affected processes on a product.
- Exceeding acceleration limit values e.g. in fall sensors on smartphones, or exceeding pressure limit values, e.g. in gas bottles, are of great interest in industry today. It is often interesting to find out how often a predefined limit value was exceeded or undershot.
- limit value detection devices are used in the medical or clinical environment in the form of so-called sterilization cycle counters during autoclaving.
- Autoclave i.e. steam sterilization of instruments in clinical environments, is a necessary process to ensure germ-free and safe reuse of sterilized medical instruments.
- this process with hot, saturated steam often places considerable strain on the instruments and must not exceed a certain maximum number.
- a generic device for determining limit value events is described in WO 2018/069 079 A1.
- This device has a gear or a rack, the teeth of which a pawl can engage. After each detected limit value event, the pawl jumps one tooth further.
- the number of limit value events that can be detected using this device is always limited exactly to the number of teeth present. This means that for a gear wheel with, for example, twelve teeth (and correspondingly twelve tooth gaps into which the pawl can engage), the number of limit value events to be detected is limited to exactly eleven, because on the twelfth pass the initial state for the first tooth is reached again. After a complete run, the device must be reset to start a new counting process.
- the number of limit value events to be detected is limited to the number of detents or teeth of the detent element (e.g. a gear), the user must exercise caution when counting the detected limit value events in order not to overlook an overflow. This could be circumvented by increasing the number of possible limit events to be detected. For this purpose, it would be conceivable to increase the number of notches or teeth. However, the detent element (e.g. gear) cannot be enlarged as desired, as this would no longer take the idea of microstructuring technology into account.
- the limit value detection device has, among other things, a latching mechanism.
- the latching mechanism has a first latching element with a plurality of latches and at least a second latching element with a plurality of latches.
- the latching mechanism can also have more than two latching elements.
- the limit value detection device also has at least one pawl which is designed to engage in a detent space between two adjacent detents of one of the detent elements.
- the notch space is the gap between two notches.
- the pawl blocks the movement of the catch element, in whose catches the pawl engages, in a first direction. This direction is therefore also referred to as the blocking direction.
- the latch allows movement in the opposite direction.
- the detent element in whose detents the pawl engages, can therefore move in the freewheeling direction relative to the pawl, while movement of the detent element in the locking direction is prevented by the pawl.
- the limit value detection device according to the invention further has an actuating device which is designed is to actuate the first detent element or the pawl, so that the first detent element moves relative to the pawl in a detent-wise manner in the freewheeling direction. According to the invention, this relative movement takes place in detents, ie the first detent element and the pawl are moved further by exactly one detent with each deflection of the actuating device.
- the first detent element and the pawl are moved relative to each other with each deflection of the actuating device in such a way that the first detent element moves step by step relative to the pawl by one detent per actuation. If the limit value is exceeded or fallen below, the actuating device moves the first detent element relative to the pawl by one detent at a time. The actuating device can then return to its initial position. This means that the occurrence of a limit value event can be detected multiple times. The actuating device can react sensitively to the variable to be measured for the purpose of limit value detection.
- the actuating device can be deflected, for example, in response to a force, a temperature, a pressure, an electrical current, and the like, such that it actuates the first detent element or the pawl and moves it relative to one another by one detent at a time when a predefined threshold value is reached the size to be measured is exceeded or exceeded.
- the two or more detent elements of the detent mechanism together form a counting unit, with the number of limit value events to be detected being determined based on the position or position of the respective detent elements relative to one another. This essentially corresponds to coding the number of limit value events to be detected using the detent elements. In order to determine the number of limit value events that have occurred, all the detent elements involved can be considered.
- the respective positions or positions of the individual catch elements together always define a unique combination in the sense of a coding.
- the number of possible unique position combinations is determined, among other things, by the number of detents (e.g. teeth) of the respective detent elements. A particularly large number of possibilities arise, for example, if, with two detent elements involved, the number of detents (e.g. teeth) of the first detent element differs from the number of detents (e.g. teeth) of the second detent element, and both do not have a largest common divisor.
- the latching mechanism is manufactured using microstructuring technology and can be designed, for example, as a microsystem or micromechanical or micro-electromechanical system, MEMS for short (Micro Electro Mechanical System).
- MEMS Micro Electro Mechanical System
- a microsystem differs significantly from precision engineering structures in terms of structure and requirements for its production. While precision engineering structures, such as gears for clockworks, are usually punched or occasionally lasered, microsystem structures are usually manufactured using etching processes. Many structures that which can be produced using precision engineering, can only be achieved with great difficulty or not at all using microsystem technology.
- producing the latching mechanism as a microsystem has the decisive advantage that the latching mechanism becomes very compact and space-saving.
- microsystem structures are often several orders of magnitude smaller.
- FIG. 1 shows a schematic view of a limit value detection device according to the invention according to a first exemplary embodiment
- Fig. 2 shows a coding table to display the counter reading of the counting unit
- FIG. 3 shows a schematic view of a limit value detection device according to the invention according to a further exemplary embodiment
- FIG. 4A shows a schematic view of a limit value detection device according to the invention according to a further exemplary embodiment
- FIG. 4B shows a schematic view of a limit value detection device according to the invention according to a further exemplary embodiment
- Fig. 5 shows a coding table to display the counter reading of the counting unit
- Fig. 6 is a schematic view of a detent element with an electrical
- FIG. 7 shows a further schematic view of a detent element with an electrical component for reading the counter reading of the counting unit according to exemplary embodiments
- FIG. 8 shows a further schematic view of a detent element with an electrical component for reading the counter reading of the counting unit according to exemplary embodiments.
- a counting unit is formed from a first detent element 103 and a second detent element 203. This is just to illustrate the general concept. It is also conceivable that there are more than two catch elements, which then together form a counting unit. If there are three or more detent elements, these several detent elements can all engage with the same detent element, for example with the first detent element 103, for example in the sense of a parallel connection.
- detent elements are all connected in series, in the sense of a series connection, so that each detent element only engages exactly with another detent element.
- a series connection of detent elements can in principle also be combined with a parallel connection of detent elements.
- individual detent elements can be designed in a ring shape, with one or more further detent elements being able to be arranged inside and/or outside the annular detent element.
- the detent elements arranged inside could all come into engagement with the annular detent element in the sense of a parallel connection.
- the detent elements arranged within could all be connected in series in the sense of a series connection. The same also applies to other locking elements arranged outside. It would also be conceivable for several annular catch elements to be arranged one inside the other.
- detent elements have external teeth
- these detent elements could have internal teeth. The same applies the other way around.
- the first and second detent elements 103, 203 are each designed as gears, purely by way of example, in which case the detents 102a, 102b, ..., 102n; 220a, 220b, ..., 220m are designed as teeth of the respective gear 103, 203.
- the first and second detent elements 103, 203 are each designed as racks, in which case the detents 102a, 102b, ..., 102n; 220a, 220b, ..., 220m are designed as teeth of the respective rack 103, 203. Everything that is described in the following description with reference to gears also applies to racks, and vice versa.
- FIG. 1 shows a first embodiment of a limit value detection device 100 according to the invention.
- the limit value detection device 100 has a latching mechanism 101.
- the latching mechanism 101 has a first latching element 103 and a second latching element 203.
- the latching mechanism 101 has more than the two latching elements 103, 203 shown here purely as an example.
- everything that is described herein with reference to the first and second detent elements 103, 203 also applies accordingly to every other detent element.
- the two or more detent elements can be arranged in the sense of a series connection in such a way that each detent element engages in exactly one other detent element.
- the two or more detent elements can be arranged in the sense of a parallel connection in such a way that the second and each further additional detent element each engage in the first detent element.
- the two or more detent elements can be arranged in the sense of a parallel connection in such a way that the second and each further additional detent element each engage in the first detent element.
- the two detent elements 103, 203 are each designed as a gear with external teeth. However, it would also be conceivable for at least one of the two detent elements 103, 203 to be designed with internal teeth or as a rack with several teeth.
- the latching mechanism 101 can further have a pawl 104, which is functionally coupled to one of the latching elements 103, 203.
- the pawl 104 can, for example, be placed in a space between two catches 102a, 102b, ..., 102n; 220a, 220b, ... , 220m intervene.
- the pawl 104 can be designed in such a way that it allows movement of the respective detent element 103, 203 in only one direction, while inhibiting movement in the opposite direction.
- the first detent element 103 has a plurality n (at least two) of detents 102a, 102b, ..., 102n, which are designed here in the form of teeth. A space between two adjacent catches is formed into which the pawl 104 can engage.
- the second detent element 203 also has a plurality m (at least two) of detents 220a, 220b, ..., 220m, which are designed here in the form of teeth.
- the teeth or detents 102a, 102b, ..., 102n of the first gear or detent element 103 engage in the teeth or detents 220a, 220b, ..., 220m of the second gear or detent element 203 .
- the first detent element 103 is movable in a freewheeling direction 106 relative to the pawl 104. In a blocking direction 107, however, a movement of the first detent element 103 can be blocked by means of the pawl 104. This can be achieved, for example, by a suitable geometric shape of the pawl 104 and the individual catches 102a, 102b, ..., 102n.
- the device 100 also has an actuation device 108.
- the actuating device 108 is designed around the first detent element 103 and the pawl 104 to move relative to each other in a detent manner in the freewheeling direction 106. This means that the actuating device 108 can actuate either the first detent element 103 or the pawl 104 in order to move the first detent element 103 relative to the pawl 104 in a detent-wise manner.
- the actuating device 108 actuates the first detent element 103.
- the actuating device 108 can have a thermal bending transducer 111.
- the thermal bending transducer 111 can be, for example, a bimetallic strip with different thermal expansion coefficients.
- the thermal bending transducer 111 can also have a so-called bimorph. While the bimetallic strip has two metals with different coefficients of expansion, the bimorph generally has two different materials.
- the bimorph may have a first active region comprising metal and a second active region comprising silicon.
- the thermal bending transducer 111 can, for example, have an active region that is thermally deformable.
- the thermal bending transducer 111 can preferably be deflected in a first direction 113 due to temperature. After cooling, the thermal bending transducer 111 returns to its original shape.
- the thermal bending transducer 111 can also have a shape memory alloy, a so-called Shape Memory Alloy (SMA).
- SMA Shape Memory Alloy
- the actuating device 108 can advantageously be designed in such a way that it is deflected in a first direction 113 when a predefined limit value is exceeded and/or fallen below, in order to use this deflection to move the first detent element 103 in detent-wise manner in the freewheeling direction 106.
- the actuating device 108 has an actuating element 112, which can engage in a detent space between two adjacent detents 102a, 102b, ..., 102n of the first detent element 103.
- the actuating element 112 can, for example, have a pawl-like shape which is designed to engage between two adjacent detents 102a, 102b, ..., 102n of the first detent element 103.
- the actuating element 112 can also be coupled to the thermal bending transducer 111, so that the actuating element 112 moves with the thermal bending transducer 111 when it is deflected.
- the thermal bending transducer 111 can deform in a first direction 113 when a temperature limit value is exceeded (alternatively: when it falls below it) and the actuating element 112 can also move in this first direction. move direction 113.
- the actuating element 112 latched between two adjacent detents 102a, 102b, ..., 102n thereby moves the first detent element 103 in the freewheeling direction 106.
- the pawl 104 disengages, the first detent element 103 rotates further by one detent, and the pawl 104 latches in the following notch space.
- the first gear 103 would continue to rotate in the freewheel direction 106 by exactly one tooth.
- the thermal bending transducer 111 When the temperature has then fallen below the temperature limit again (alternatively: risen above the temperature limit), the thermal bending transducer 111 returns to its original shape and moves in a second direction 114 that is opposite to the first direction 113. This moves also the actuating element 112 in this second direction 114 and latches from the previous notch gap into the next notch gap. Following this, a new limit value detection can then be carried out.
- the detents or teeth 102a, 102b, ..., 102n of the first detent element or gear 103 engage in the detents or teeth 220a, 220b, ..., 220m of the second detent element or gear 203.
- the second gear 203 also rotates continuously. This results in several unique positions or positions of the catch elements 103, 203 relative to one another.
- the detent elements or gears 103, 203 of the detent mechanism all have a different number of detents or teeth.
- one and the same tooth (e.g. tooth no. 2) of one gear 103, 203 can move into different detent spaces or tooth gaps (e.g. in tooth gap 8/9 between teeth 8 and 9 and also engage in the tooth gap 20/21 between teeth 20 and 21) of the other gear 103, 203.
- a first position of the gears 103, 203 relative to one another in which tooth No. 2 of the first gear 103 engages in the tooth gap 8/9 of the second gear 203, can represent a first counter reading
- a different one second position of the two gears 103, 203 relative to each other in which tooth No. 2 of the first gear 103 engages in the tooth gap 20/21 of the second gear 203, can represent a different second counter reading.
- the counting unit which is formed from the individual detent elements of the detent mechanism 101 (here: from the first and second detent elements or gears 103, 203), can indicate the count of the detected limit value events in the sense of coding.
- the number of possible unique positions of the individual gears 103, 203 relative to one another determines the number of available code words. This will be explained in more detail below with reference to the table shown in Figure 2.
- the first gear Z1 would correspond to the first detent element 103 and the second gear Z2 would correspond to the second detent element 203.
- the first column of the table shows the counter readings that can be displayed using the unique combinations of positions of the two gears Z1, Z2 relative to one another before possible position combinations are repeated.
- the counter readings represent the number of detected limit value events, e.g. the number of sterilization cycles carried out (which is why the counter reading is referred to as “cycles” as an example).
- the second column of the table lists the teeth 1, 2 and 3 of the first gear Z1.
- the third column of the table lists teeth 1 to 5 of the second gear Z2.
- the fourth column of the table shows the possible combinations of the teeth of the first gear Z1 with the teeth of the second gear Z2, and thus the different position combinations of the two gears Z1, Z2 relative to one another.
- the first digit represents the number of the tooth of the first gear Z1
- the hyphenated second digit represents the number of the tooth of the second gear Z2.
- tooth No. 1 of the first gear Z1 can come into contact with tooth No. 1 of the second gear Z2 during a first 360° rotation (see code word 1-1 in line 1 of the table).
- tooth No. 1 of the first gear Z1 can come into contact with tooth No. 4 of the second gear Z2 (see code word 1-4 in line 4 of the table).
- tooth No. 1 of the first gear Z1 can come into contact with tooth No.
- the number of limit value events to be detected is therefore coded with a code that results from the different combinations of tooth positions or from the different combinations of positions of the two gears 103, 203 relative to one another.
- each individual numerical code or each code word ie each different engagement position of the teeth of the first gear Z1 with the teeth of the second gear Z2, corresponds to a different position or position of the two gears Z1, Z2 relative to one another.
- the first detent element or gear 103 and the second detent element or gear 203 together form a counting unit in which the number of limit value events to be detected is determined based on possible different positions or positions of the two detent elements 103, 203 relative to one another.
- This coding is particularly suitable when the individual gears Z1, Z2 have a different number of teeth.
- the number of possible combinations can be maximized if the number of teeth of the individual gears Z1, Z2 do not have a greatest common divisor (gcd).
- the maximum number of code words or combinations would be possible, which is calculated by multiplying the number of teeth of the individual gears Z1, Z2 (e.g. according to: z1 * z2).
- 3 * 5 15 different unique position combinations of the two gears Z1, Z2 relative to one another are possible.
- the number of possible unique combinations is calculated according to the following rule: z1 / gcd *z2. If, for example, the first gear Z1 had six teeth instead of the five specified above, then the largest common divisor would be the number 3, and accordingly instead of the previously mentioned 15 unique position combinations, only six unique position combinations would be possible, even though that The first gear Z1 even has one more tooth here.
- the initial or initial position of the individual detent elements or gears 103, 203 represents the count value '0'.
- code word 1-1 in line 1 of the table
- a sterilization cycle counter in the starting position code word 1-1
- the counter reading '0' in line 1 of the table indicates the counter reading '0' in line 1 of the table.
- the counter jumps to the value '1', which is indicated by the counter reading '1' in line 2 of the table. This means that exactly one of all possible position combinations of the gears 103, 203 is reserved for the starting position.
- the counting unit which is formed from the individual detent elements of the detent mechanism 101 (here: from the first and second gears 103, 203), (z1 * z2) - 1 different counter readings can be realized for counting limit value events, provided that the number of teeth on both Gears 103, 203 do not have a greatest common divider (gcd). If a GCD exists, then the number of possible unique meter readings would be calculated according to:
- the gear with the smaller number of teeth has a smaller diameter than the gear with the larger number of teeth.
- Embodiments of the invention provide that in the case of different numbers of teeth, the first detent element or gear 103 has fewer teeth than the second detent element or gear 203. The first gear 103 would therefore have a smaller diameter than the second gear 203. This has the advantage in that a gear reduction is thereby realized, with a lower torque being required to rotate the smaller first gear 103. This plays a role that should not be neglected, particularly in the components of the limit value detection device 100 according to the invention manufactured using microstructuring technology.
- FIG 3 shows a further conceivable exemplary embodiment of a limit value detection device 100 according to the invention.
- the same parts with the same function, as explained previously with reference to Figure 1, are provided with the same reference numerals.
- Figure 1 For a description in this regard, please refer to Figure 1.
- the embodiment shown in Figure 3 differs from the embodiment shown in Figure 1, among other things, in that the second catch element or gear 203 is arranged at a distance from the first catch element or gear 103, and the catches or teeth 102a, 102b, . .. , 102n; 220a, 220b, ..., 220m of the two locking elements 103, 203 do not engage with one another. As shown in Figure 3, the two detent elements 103, 203 can be arranged next to each other.
- the latching mechanism 101 has more than the two latching elements 103, 203 shown here purely as an example.
- one or more further detent elements could cooperate with the first detent element 103, and/or one or more further detent elements could cooperate with the second detent element 203.
- a second pawl 204 is provided here, which is in a notch space or a tooth gap between two adjacent notches or teeth 220a, 220b, ..., 220m of the second detent element or gear 203 can engage.
- the second pawl 204 allows movement or rotation of the second detent element or gear 203 in a freewheeling direction 306, and blocks movement or rotation of the second detent element or gear 203 in an opposite locking direction 307.
- the actuating device 108 has a second actuating element 212, which can engage in a detent space or in a tooth gap between two adjacent detents or teeth 220a, 220b, ..., 220m of the second detent element or gear 203.
- the second actuating element 212 can, for example, have a pawl-like shape which is designed to engage between the two adjacent detents 220a, 220b, ..., 220m of the second detent element 203.
- the actuating device 108 can advantageously be designed in such a way that it is deflected in a first direction 113 when a predefined limit value is exceeded and/or fallen below, in order to, by means of this deflection, in addition to the first detent element 103, also the second detent element 203 each detent in the freewheeling direction 106 , 306 to move.
- the second actuating element 212 can be coupled to the thermal bending transducer 111, so that the second actuating element 212 moves with the thermal bending transducer 111 when it is deflected.
- the thermal bending transducer 111 can deform in a first direction 113 when a temperature limit value is exceeded (alternatively: when it falls below it) and the second actuating element 212 can also move in this first direction 113.
- the second actuating element 212 which is latched between two adjacent detents 220a, 220b, ..., 220m, thereby moves the second detent element 203 in the freewheeling direction 306.
- the second pawl 204 disengages, the second detent element 203 rotates exactly one detent further, and the second Pawl 204 latches into the subsequent notch space.
- the second gear 203 would continue to rotate in the freewheel direction 306 by exactly one tooth.
- the thermal bending transducer 111 When the temperature has then fallen below the temperature limit again (alternatively: risen above the temperature limit), the thermal bending transducer 111 returns to its original shape and moves in a second direction 114 that is opposite to the first direction 113. This moves also the second actuating element 212 in this second direction 114 and latches from the previous detent space into the next detent space. Following this, a new limit value detection can then be carried out.
- the respective position or position of the respective detent element or gear 103, 203 can be determined at this marking 300.
- a single marking 300 is shown purely as an example. However, a separate marking can also be provided for each detent element 103, 203.
- tooth No. 12 of the first detent element or gear 103 and tooth No. 1 of the second detent element or gear 203 would be opposite each other at the marking 300. This would correspond to a code word 12-1, which in turn would correspond to a specific counter reading of the counting unit.
- FIG 4A shows a further exemplary embodiment of a limit value detection device 100 according to the invention.
- the same parts with the same function as previously explained with reference to Figures 1 and 3 are provided with the same reference numerals. For a description in this regard, please refer to these figures.
- the second detent element or gear 203 moves or rotates continuously with the first detent element or gear 103, that is, every time the first detent element or gear 103 moves around a detent continues to rotate, the second detent element or gear 203 also rotates one detent further.
- the second detent element or gear 203 therefore moves continuously with the first detent element or gear 103. This can be achieved by engaging the teeth of both gears 103, 203 ( Figure 1), or alternatively ( Figure 3) by the actuating device 108 moving and rotating both gears 103, 203 together by one detent or one tooth in one actuation process .
- the embodiment shown in Figure 4A differs from the previously discussed embodiments, among other things, in that the second detent element or gear 203 moves discontinuously together with the first detent element or gear 103. This is to be understood as meaning that the second detent element or gear 203 does not also move or rotate in detent fashion with every detent-wise movement or rotation of the first detent element or gear wheel 103. Instead, the second detent element or gear 203 only rotates by one detent every nth detent-wise movement or rotation of the first detent element or gear 103, where n > 1.
- the second detent element or gear 203 only moves or rotates by one detent or tooth for each full revolution (by 360°) of the first detent element or gear 103.
- the first detent element or gear 103 can have a driver 400.
- the first gear 103 has an annular structure, i.e. the toothing with the teeth 102a, 102b, ..., 102n is arranged radially on the outside on the outer circumference 420 of the first gear 103.
- the driver 400 is arranged on the inner circumference 430 of the annular first gear 103.
- the first detent element or gear 103 can be designed annularly, with the detents or teeth 102a, 102b, ..., 102n being arranged in the form of external teeth on the outer circumference 420 of the annular first detent element or gear 103.
- the annular first detent element or gear 103 can also have a driver 400 which is arranged on the inner circumference 430 of the annular first detent element or gear 103.
- the second detent element or gear 203 can be arranged within the annular first detent element or gear 103.
- the outer diameter (including the teeth 220a, 220b, ..., 220m) of the second detent element or gear 203 would be smaller than the inner diameter of the annular first detent element or gear 103 (without the driver 400).
- the teeth 220a, 220b, ..., 220m of the second detent element or gear 203 can be designed in the form of external teeth on the outer circumference of the second detent element or gear 203.
- the teeth 220a, 220b, ..., 220m of the external toothing are therefore located of the second detent element or gear 203 opposite the driver 400, which is arranged on the inner circumference 420 of the annular first detent element or gear 103.
- the driver 400 can come into engagement with the teeth 220a, 220b, ..., 220m of the external teeth of the second detent element or gear 203. As a result, the driver 400 continues to rotate the second detent element or gear 203 detent by detent, i.e. by exactly one detent or exactly one tooth.
- the second detent element or gear 203 is arranged outside the first detent element 103.
- the driver 400 or another driver, would also be arranged on the outer circumference 420 of the first detent element 103.
- the driver would move the externally arranged detent element discontinuously (e.g. after every full 360 ° rotation of the first detent element 103) by one detent.
- the first detent element or gear 103 has exactly one driver 400 on the inner circumference 430 and/or on the outer circumference 420.
- the first detent element or gear 103 can rotate through a full 360° before the driver 400 then moves the second detent element or gear 203 by exactly one detent or tooth.
- the second detent element or gear 203 is only rotated further by one detent or tooth after each full 360° rotation of the first detent element or gear 103.
- first detent element or gear 103 has exactly a single driver 400, all teeth 102a, 102b, ..., 102n of the external teeth of the first detent element or gear 103 can first pass completely and be used to count the detected limit value events (e.g. exceeding the temperature threshold value). while the second detent element or gear 203 is always in the same position.
- the latching mechanism 101 has more than the two latching elements 103, 203 shown purely as an example.
- further detent elements are provided which have the same function and the same features as the second detent element 203 described here as an example.
- the one or more additional detent elements could be arranged within the first detent element 103, as in the example the second detent element 203 was described. Alternatively or additionally, the one or more additional detent elements could be arranged outside the first detent element 103.
- the counting unit according to the invention is always formed from the individual detent elements of the detent mechanism 101 (here: from the first detent element or gear 103 and the second detent element or gear 203), the individual detent elements or gears 103, 203 are used to count the detected Limit events used.
- the individual gears 103, 203 there are several possible unique positions of the individual gears 103, 203 relative to one another, which can represent the counter reading in the sense of coding. This will be explained in more detail below using the table shown in Figure 5.
- the table in Figure 5 shows examples of possible different combinations of positions of two gears relative to one another, as described in the embodiment from Figure 4A.
- the first detent element or gear 103 has a driver 400. After every full 360° rotation of the first detent element or gear 103, the driver 400 actuates the second detent element or gear 203 and moves or rotates it further by one detent or tooth.
- the table lists two gears Z1, Z2 with different numbers of teeth.
- the first gear Z1 would correspond to the second detent element 203 and the second gear Z2 would correspond to the first detent element 103.
- the first column of the table shows the counter readings that are possible using the unique combinations of positions of the two gears Z1, Z2 relative to one another before possible position combinations are repeated.
- the second column of the table lists teeth #1, #2 and #3 of the first gear Z1.
- the third column of the table lists teeth Nos. 1 to 5 of the second gear Z2.
- the fourth column of the table shows the possible combinations of the teeth of the first gear Z1 with the teeth of the second gear Z2, and thus the resulting code words that describe the different position combinations of the two gears Z1, Z2 relative to one another.
- the first digit represents the number of the tooth of the first gear Z1
- the hyphenated second digit represents the number of the tooth of the second gear Z2.
- the first detent element or gear 103 (here: Z2) rotates through a full 360 ° while the second detent element or gear 203 (here: Z1) is in one and the same position during this time or position remains.
- the individual detent elements of the detent mechanism 101 (here: the first detent element or gear 103 and the second detent element or gear 203) together form a counting unit in which the number of limit value events to be detected is based on possible different positions or positions of the individual ones Detent elements 103, 203 are determined relative to one another.
- the first detent element or gear 103 has more than the individual driver 400 shown here as an example. It would also be conceivable that, in addition to the second detent element or gear 203, there would be further detent elements or gears that could be moved in detents using the driver 400 (or several drivers). It would also be conceivable that, in addition to the second detent element or gear 203, there would be further detent elements or gears, the detents or teeth of which engage in the detents or teeth of the second detent element 203 and are moved further by the second detent element 203.
- the driver 400 or an additional driver, would be attached to the outer circumference 420 of the first detent element or gear 103.
- the driver 400 could be arranged, for example, between two adjacent detents 102a, 102b.
- the driver 400 could be longer than the catches 102a, 102b, ..., 102n and thus beyond the outer contour the catches 102a, 102b, ..., 102n protrude.
- the second detent element or gear 203 could be arranged at a distance from the first detent element or gear 103, so that the detents or teeth 102a, 102b, ..., 102n of the first detent element or gear 103 do not come into contact with the detents or Teeth 220a, 220b, ..., 220m of the second detent element or gear 203 come into engagement.
- the protruding driver 400 would then be able to engage in the catches or teeth 220a, 220b, ..., 220m of the second catch element or gear 203 in order to further rotate the second catch element or gear 203 by one catch or tooth.
- an end stop can also be implemented, whereby the second detent element or gear 203, which is carried by means of the driver 400, could run against the end stop after a complete 360 ° rotation. This allows a maximum number of limit value events to be detected to be set without overflow occurring.
- FIG. 4B shows a corresponding conceivable exemplary embodiment of a limit value detection device 100 according to the invention with an end stop.
- the same parts with the same function as previously explained with reference to FIG. 4A are provided with the same reference numerals.
- FIG. 4A Also in the exemplary embodiment according to FIG. 4B, more than the two detent elements 103, 203 shown purely as an example can be provided. In particular, it would be conceivable for further detent elements to be provided which have the same function and the same features as the second detent element 203 described here as an example.
- the one or more additional detent elements could be arranged within the first detent element 103, as in the example of second detent element 203 was described. Alternatively or additionally, the one or more additional detent elements could be arranged outside the first detent element 103.
- FIG. 4B has an optional end stop 410.
- the end stop 410 is designed to prevent the counting unit from continuing to rotate at a certain point. For example, the movement of the counting unit can be prevented exactly when an overflow would otherwise occur, i.e. without the end stop 410. This would be the case, for example, after all tooth combinations or code words have been run through exactly once. This means that overflow can be prevented, which is advantageous, for example, for the purposes of counterfeit protection and can counteract manipulation.
- the end stop 410 can be designed as a mechanical end stop.
- the end stop 410 can, for example, be one of the outer circumference of the second catch element or Gear 203 have protruding first stop element 411.
- This can be designed, for example, in the form of an additional detent element or tooth.
- This additional tooth 411 can be arranged in a detent space between two adjacent detents 220a, 220b, ..., 220m.
- the end stop 410 can also have a fixed second stop element 412.
- the second stop element 412 is arranged opposite the second detent element 203 in such a way that the detents or teeth 220a, 220b, ..., 220m of the second detent element 203 can run unhindered past the second stop element 412 during rotation.
- the first stop element 411 can be designed to be longer than the remaining detents 220a, 220b, ..., 220m, i.e. the first stop element 411 can protrude further from the outer circumference of the second detent element 203 than the remaining detents 220a, 220b, ..., 220m .
- the first stop element 411 can protrude so far that it does not run unhindered past the second stop element 412 but instead hits the second stop element 412. This prevents further rotation of the second catch element 203.
- Figure 4B is only a schematic view.
- the end stop 410 or its stop elements 411, 412 can also be arranged at a different position.
- the stop elements 411, 412 are arranged in such a way that the driver 400 can move past them unhindered.
- the first stop element 411 is also designed such that it does not touch the inner circumference 430 of the first detent element 103.
- Such an end stop 410 would also be conceivable in the exemplary embodiments discussed previously with reference to FIGS. 1, 3 and 4.
- one of the two detent elements 103, 203 shown there could be replaced by the embodiment shown in Figure 4B.
- the inner small detent element from FIG. 4B could serve purely for the purpose of realizing the end stop 410, while the coding described here is still accomplished by means of the two large detent elements 103, 203.
- the movable parts of the microstructured limit detection device 100 could move in a common plane.
- the moving parts include, among other things, the detent elements or gears 103, 203 and the actuating device 108.
- the limit value detection device 100 could be arranged on a substrate so that all moving parts move in the substrate plane, ie parallel to the substrate surface.
- the detent elements or gears 103, 203 could have scales by which the teeth can be numbered and/or the meter readings can be read.
- the scales can, for example, be attached (e.g. printed, engraved or lasered) to the detent elements or gears 103, 203.
- detents or teeth By numbering the detents or teeth, it could be read, for example, which detents or teeth 102a, 102b, ..., 102n of the first detent element or gear 103 correspond to which detents or teeth 220a, 220b, ..., 220m of the second detent element or gear 203 would be in engagement ( Figure 1), or which detents are opposite each other and / or which detents are each at a marking (e.g. marking 300 in Figure 3).
- the position of the two detent elements or gears 103, 203 relative to one another can be determined using a scale.
- the position or attitude of the respective detent element or gear 103, 203 can be determined, for example, by means of an electrical component (e.g. capacitor), which changes its electrical properties (e.g. capacitance) depending on the position of the respective detent element or gear 103, 203.
- an electrical component e.g. capacitor
- changes its electrical properties e.g. capacitance
- the first detent element or gear 103 is designed here as a freely rotatable gear. However, it would also be conceivable that the first detent element or gear 103 could be rotated elastically, that is, the gear 103 could, for example, be rotatable against a spring force.
- a spring (not shown here), such as a spiral spring known from clockworks, could be coupled to the gear 103 so that when the gear 103 moves in a first direction, the spring is tensioned (ie either compressed or tensioned), and When moving the gear 103 in a second direction opposite to the first direction, the spring relaxes. This also applies to all embodiments discussed herein, as well as to the second detent element or gear 203.
- the pawl 104 engages in the spaces between two adjacent teeth 102a, 102b. It can be seen that here too, due to the specific shape of the pawl 104 and the individual teeth 102a, 102b, there is a freewheeling direction 106 in which the gear 103 is freely rotatable relative to the pawl 104. However, in the opposite direction, ie in a blocking direction 107, the pawl 104 blocks the movement of the gear 103.
- the actuating device 108 actuates the detent element 103 in order to move it relative to the pawl 104 in the freewheeling direction 106 by one detent 102a, 102b at a time. As can be seen, the actuating device 108 engages a detent 102c of the detent element 103 in order to move the detent element 103 further in detents relative to the pawl 104.
- the limit value detection device 100 according to the invention is provided here on a substrate 210.
- the substrate 210 can be, for example, a silicon wafer.
- the device 100 according to the invention can be provided on the substrate 210 as a microsystem.
- the depicted gear structure 103 can be produced by suitable etching processes.
- the actuating device 108 is deflected upward in the image plane in order to actuate the gear 103.
- the deflection of the actuating means 108 therefore occurs in the horizontal direction, i.e. in a plane parallel to the substrate plane.
- the movement of the actuating device 108 is essentially a pivoting movement caused by the supply of external energy (e.g. thermal energy), the behavior of the actuating device 108 in this example being approximately comparable to that of a cantilevered beam.
- external energy e.g. thermal energy
- the use of the previously mentioned electrical component 109 for determining the actual position of the detent element 103 is not limited to the embodiment of the actuating device 108 shown in FIG. Rather, the electrical component 109 can be used independently of the specific design of the actuating device 108, which is why the electrical component 109 can be combined with all of the embodiments described herein.
- the electrical component 109 is designed here purely as an example as a capacitor. More specifically, here a first capacitor plate 201 is provided on the substrate 210 and a second capacitor plate 202 is provided on the detent element 103. It would also be conceivable that a first capacitor plate 201 on the first detent element 103, and a second capacitor plate 202 is arranged on the second detent element 203 (not shown here).
- the two capacitor plates 201, 202 are two semicircular segments. In the position of the gear 103 relative to the substrate 210 shown in Figure 6, the two capacitor plates 201, 202 are aligned with one another in such a way that they lie exactly opposite one another, i.e. so that they join together to form a complete circle when viewed from above.
- the capacitor 109 Due to the position of the two capacitor plates 201, 202 relative to one another, the capacitor 109 has a certain capacitor capacity in this position.
- the gear 103 rotates relative to the substrate 210 and thus the orientation of the two capacitor plates 201, 202 relative to one another also changes.
- the capacitor capacity of the capacitor 109 also changes.
- the electrical component 109 can be an adjustable member of an RFID resonant circuit 207.
- the RFID resonant circuit 207 can also have a coil 206. This is an LC resonant circuit with a component-dependent resonance frequency.
- the resonance frequency of the resonant circuit 207 changes depending on the capacitor capacity of the adjustable capacitor 109. This results in a specific position of the two capacitor plates 201, 202 relative to one another for each position of the gear 103 relative to the substrate 210 or relative to the pawl 104. This results in a specific capacitor capacity and thus a specific resonance frequency of the RFID resonant circuit 207 for each actual position.
- the RFID resonant circuit 207 has a specific resonance frequency for each actual position of the gear 103 relative to the substrate 210 or relative to the pawl 104.
- the RFID resonant circuit 207 can be read using a suitable RFID reader.
- the position of the gear 103 (second capacitor plate 202) relative to the substrate 210 (first capacitor plate 201) or relative to the pawl 104 can be deduced from the respective characteristic transmission frequency of the resonant circuit 207.
- the position of the first detent element 103 relative to the second detent element 203 could be inferred from the respective characteristic transmission frequency of the resonant circuit 207.
- the device 100 can have an electronic interface 209 for this purpose.
- the electronic interface 209 enables the change in the electrical component 109 to be read out, e.g. B. if the electrical component 109 directly represents the adjustable link of an RFI D resonant circuit or more complex electronics.
- the electrical component 109 corresponds to a typical component (capacitor, coil, resistor) of a resonant circuit 207, e.g. a variable capacitor 109, and this forms an LC resonant circuit 207 together with a coil structure 206, a change in the capacitance also changes the oscillation characteristics of the Resonant circuit 207.
- the resulting passive transponder of an RFID system can be read wirelessly with an appropriate reading device. It is also conceivable that the electrical component 109 is a coil and that the other resonant circuit element 206 would be a capacitor.
- electrical energy can be wirelessly coupled into the circuit with the aid of a corresponding reading device and used to carry out functions of the electronic circuit, e.g. for signal amplification, - evaluations, and other sending tasks.
- the electrical component 109 does not necessarily have to be a capacitor. It would also be conceivable that the electrical component 109 is an ohmic resistor, a coil or an electro-optical element.
- the first detent element 103 is designed here in the form of a rack having several teeth 102a, 102b.
- the actuating device 108 is designed in the form of a linear actuator which actuates the detent element 103.
- the actuating device 108 pulls or pushes the rack 103 in the freewheel direction 106.
- the detent element 103 is shown here as a linear rack. However, it is also conceivable that the rack 103 is not linear but curved.
- a rack 103 can also have a circular arc or circular segment-shaped structure, wherein the toothing can be arranged radially on the inside and/or radially on the outside.
- the individual detents 102a, 102b are arranged one behind the other along the detent element 103 in the freewheeling direction 106, so that the pawl 104 moves one after the other from a detent space 105a during the detent movement engages in the next adjacent detent space 105b.
- no separate reset mechanism needs to be provided for the endlessly rotating gear 103.
- the actuating device 108 can, for example, have a traction device 401 and a traction device 402, which actuates the actuating device 108 by means of the traction device 401 and thus moves the rack 103.
- the actuating device can 108 be deflectable, for example, mechanically (this also includes thermally) or electrically.
- the electrical component 109 can, as mentioned at the beginning, be a variable ohmic resistance.
- the resistor 109 can be arranged between the latching mechanism 101 and the substrate 210.
- the variable ohmic resistor 109 is roughly comparable to a potentiometer. With each notch-wise further movement of the latch element 103 relative to the pawl 104 or relative to the substrate 210, its electrical resistance changes.
- the ohmic resistance 109 can also be part of a resonant circuit 207.
- This is, for example, a tunable RL resonant circuit 207, which has the above-mentioned ohmic resistance 109 and a coil arrangement 206.
- a capacitor can also be used as a tunable electrical component 109 in order to form, together with the coil 206, a tunable LC resonant circuit 207, as previously described with reference to FIG.
- the catch element 103 can be freely movable or also elastically movable.
- the rack 103 can be actuated with a spring.
- Figure 8 shows such an embodiment.
- the embodiment shown here differs from the embodiment previously described with reference to FIG. 7, among other things, in that the actuating device 108 here does not actuate the detent element 103, but rather the pawl 104.
- the detent element 103 is prestressed here by means of a tensioning element 501.
- the tensioning element 501 can, for example, be a tension spring that is pulled apart in the initial state and is therefore prestressed.
- the detent element 103 could be pulled up to the last tooth in the freewheel direction 106 against the tensile force of the tension spring 501.
- the pawl 104 engages in the last space between the teeth and blocks the movement of the detent element 103 in the locking direction 107.
- the actuating device 108 here actuates the pawl 104.
- the actuating device 108 does not have to contact the pawl 104 directly, but rather the actuating device 108 can also be connected to the pawl 104 by means of a connecting means 502, for example.
- the actuating device 108 can also optionally have a deflection device 503, so that the actuating device 108 does not necessarily have to move the pawl 104 in the same direction as the deflection direction of the actuating device 108.
- an actuating device 108 which actuates the detent element 103 instead of the pawl 104.
- the detent element 103 is therefore prestressed by means of the tension spring 501, i.e. the tension spring 501 pulls the detent element 103 in the locking direction 107.
- the pawl 104 blocks the movement of the detent element 103 in this same locking direction 107.
- the prestressed detent element 103 moves due to the pretension of the tensioning element 501, i.e. the tension spring 501 now pulls the detent element 103 in the locking direction 107.
- the pawl 104 has released itself from engagement with the detent space 105a. In this case, the detent element 103 only moves forward by one detent 102a, 102b before the pawl 104 again engages in an adjacent next detent space 105b.
- a compression spring could also be provided, which presses the detent element 103 in the locking direction 107. In this case, however, the compression spring would attack on the opposite side of the detent element 103 compared to FIG.
- a braking device such as another pawl, or a mechanical stop can be provided.
- the electrical component 109 discussed with reference to FIGS. 6 to 8 can be used in all embodiments and variants of the present invention described here to determine the counter reading of the counting unit.
- both the first detent element 103 and the second detent element 203 can each have such an electrical component 109, with which the actual position of the respective detent element 103, 203 can be detected.
- the detent elements 103, 203 can either be designed as gears or racks.
- a first embodiment relates to a limit value detection device (100) for detecting a limit value event multiple times.
- the limit value detection device (100) can have a latching mechanism (101) manufactured using microstructuring technology with a first latching element (103) and a second latching element (203), each latching element (103, 203) having a plurality of latches (102a, 102b, .. . , 102n; 220a, 220b, ... , 220m).
- the limit value detection device (100) can further have a pawl (104) which is designed to engage in a detent space (105) between two adjacent detents (102a, 102b) of the first detent element (103), the first detent element (103) in a freewheeling direction (106) is movable relative to the pawl (104) and a movement of the first detent element (103) relative to the pawl (104) in a locking direction (107) can be blocked by means of the pawl (104).
- the limit value detection device (100) can further have an actuating device (108) which is designed to move the first detent element (103) and the pawl (104) in a detent-wise manner relative to one another in the freewheeling direction (106).
- the first detent element (103) and the second detent element (203) can together form a counting unit in which the counter reading for displaying the detected limit value events is determined based on the position of the two detent elements (103, 203) relative to one another.
- the latching mechanism (101) can be designed as a microsystem (MEMS: microelectromechanical system).
- the limit value detection device (100) can further have a substrate (210) on which the latching mechanism (101) is provided as a microsystem, and wherein a deflection actuating device ( 108) happens horizontally, ie in a plane parallel to the substrate plane.
- the plane in which the substrate extends and which is delimited or spanned by the lateral outer edges of the substrate is referred to as the substrate plane.
- the substrate plane can be roughly equated with the flat wafer itself.
- a movement within a plane parallel to the substrate plane can, for example, be a movement in or on the substrate.
- the limit value detection device (100) can further have a substrate (210) on which the latching mechanism (101) is provided as a microsystem, and wherein a deflection of the actuating device (108) happens vertically, i.e. perpendicular to the substrate plane.
- the limit value detection device can have a deflection device by means of which the vertical, i.e. perpendicular to the substrate plane, deflection movement of the actuating device (108) can be diverted into a horizontal, i.e. parallel to the substrate plane, directed movement.
- a vertical movement perpendicular to the substrate plane would, for example, be a movement of the actuating device (108) out of the substrate plane, i.e. the actuating device (108) would, for example, move vertically or perpendicularly away from the substrate.
- a corresponding deflection device can be provided, for example, in the form of gears, in particular bevel or worm gears.
- the deflection device it would also be conceivable for the deflection device to have a first and a second deflection means, the first deflection means having an oblique surface and the second deflection means being in contact with this oblique surface.
- the first deflection means moves in a direction that is oblique to the direction of movement of the second deflection means. For example, on an inclined surface with an angle of 45°, a deflection from a horizontal to a vertical movement can be realized.
- the actuation of the pawl (104) or the detent element (103, 203) does not take place directly by the actuating device (108) but indirectly by means of the deflection device arranged in between. This means that the actuating device (108) actuates the deflection device (perpendicular to the substrate plane) and the deflection device actuates the pawl (104) or the detent element (horizontal to the substrate plane).
- the associated catches of a catch element (103, 203) can be arranged one behind the other along the respective detent element (103, 203) in the freewheeling direction, so that the pawl (104) engages successively from one detent space into the next adjacent detent space during the detent-wise movement.
- the first and second detent elements (103, 203) can each be designed in the form of a freely rotatable gear, in which the associated detents are in the form of a radially outside or radial Teeth arranged on the inside of the respective gear (103, 203) are formed.
- a gear can also be manufactured relatively easily using microsystem technology.
- the design of the detent elements as a gear offers the advantage that the gear can be moved endlessly relative to the pawl (in detents).
- an end stop to be provided which limits the number of notch-wise movements.
- the end stop could limit further rotation of the gear. This makes it possible to avoid that the counting unit connected to the gear is zeroed after a predetermined number of detent-wise movements or rotations of the gear. This ensures that there is no overflow when reading out the meter reading.
- An end stop can also be used for racks and the like in order not to exceed a certain number of notch-wise movements.
- At least one of the two detent elements (103, 203) can be designed in the form of a rack that is movable relative to the pawl (104), in which the detents are in the form of a Rack arranged teeth are formed.
- a rack can, for example, have a linear or a curved shape.
- the toothing can be arranged on the inside, ie directed towards the center of the radius of curvature, and/or on the outside, ie on the side of the rack facing away from the center of the radius of curvature.
- one of the two locking elements (103, 203) is designed in the form of a rack, while The other of the two detent elements (103, 203) is designed in the form of a gear. However, it is also conceivable that both locking elements (103, 203) are designed in the form of a rack.
- the actuating device (108) can actuate the first detent element (103) in order to detent the first detent element (103) relative to the pawl (104) in the freewheeling direction (106). to move forward one notch at a time.
- the actuating device (108) can actuate the first detent element (103) directly or indirectly. Actuating the first detent element (103) has the advantage that the pawl (104) can be arranged stationary while the first detent element (103) is moved in the freewheeling direction.
- the latch (104) can be skipped from one detent space to the next detent space in the freewheel direction, for example, by suitable shaping of the detents (102a, 102b, ..., 102n) and the pawl (104), so that the pawl (104) when Moving the first catch element (103) slides over the catch along the catch flank and latches into the adjacent catch space.
- the actuating device (108) can engage a catch (102a, 102b, ..., 102n) of the first catch element (103) in order to move the first catch element (103) relative to the Pawl (104) to move further in notches.
- the actuating device (108) can engage a tooth of a gear and move the gear directly by one tooth. This is a relatively simple way to operate the first detent element, as no further deflection levers, etc. are required.
- the first detent element (103) can be biased by means of a tensioning element (501), and the actuating device (108) can actuate the pawl (104), with one The movement of the pawl (104) which releases the engagement in a detent space (105a) moves the prestressed first detent element (103) further by one detent (102a, 102b) due to the pretension before the pawl (104) moves back into an adjacent next detent space (105b). of the first detent element (103).
- the preload is only selected to such an extent that the gear only carries out a predetermined maximum number of detent-wise movements. This ensures that there is no overflow when reading out the meter reading.
- the actuating device (108) can be thermally deflectable. This means that thermal limit value violations can be measured.
- the actuator (108) may be a thermal bending transducer, and/or the actuator (108) may comprise a shape memory alloy.
- a thermal bending transducer is a component that changes its shape depending on the temperature. The thermal bending transducer can, for example, deform in a first direction when a limit temperature is exceeded. If the temperature falls below this limit, the thermal bending transducer returns to its original position, i.e. it deforms again in the other direction.
- a thermal bending transducer can also be a component known in the English-speaking world under the name bimorph. Such a bimorph has two or more active areas that can be operated separately from one another.
- a thermal bimorph for example, has two active areas that deform in a first direction when a limit temperature is exceeded. When the temperature falls below this limit value, the two active areas move back to their initial position, i.e. in an opposite second direction.
- the two active areas can have different coefficients of thermal expansion. As a result, the amount of deformation in both active areas is different, which in turn leads to a mechanical deflection of the bimorph.
- the thermal bimorph can therefore move in two directions in response to a temperature falling below or exceeding a limit value.
- the actuating device (108) can be deflected mechanically or electrically.
- the actuating device (108) can be deflected mechanically using certain forces, for example pressure. This can be, for example, a barometric pressure, i.e. the actuating device (108) can be used, for example, in diving chronographs and display the number of dives.
- the actuating device (108) can also be deflected, for example, by acceleration forces. For example, it can be proven whether and how often a device has fallen from a certain height, or the number of speeding violations in vehicles can be proven.
- the actuating device (108) can be designed to be deflected when a predefined limit value is exceeded and/or fallen below, in order to use this deflection to activate the first detent element (103) and the latch (104) to move relative to one another in the freewheeling direction (106).
- a limit value can, for example, be a predefined amount of a temperature, a pressure, an acceleration or other thermal, electrical or mechanical forces, depending on whether the actuating device (108) can be deflected by soft force (e.g. thermal, electrical, mechanical). This can be both an upper and a lower limit.
- the actuating device (108) only activates the pawl and/or the first detent element (103) when the force deflecting the actuating device (108) falls below or exceeds the limit value. This means that only when the predefined limit value is undershot or exceeded is the deflection of the actuating device (108) sufficient to move the first detent element (103) and the pawl (104) relative to one another.
- the limit value detection device (100) can have an electrical component (109) which is designed to determine its electrical properties depending on the position of the two detent elements (103 , 203) to change relative to each other.
- the electrical component (109) can change its electrical properties every time the latching mechanism (101), ie the first latching element (103) has moved further relative to the second latching element (203).
- the variable electrical property of the electrical component (109) can assume a specific value for each individual position of the latching mechanism (101), ie of the first latching element (103) relative to the second latching element (203).
- the electrical component (109) can be a variable resistor, a capacitor or even a coil, the respective amount (resistance, capacitance, inductance) of which changes with each detent-wise movement of the detent mechanism (101).
- each individual resistance, capacitance or inductance value is characteristic and unique for a specific position or position of the first detent element (103) relative to the second detent element (203).
- the current measured value of the electrical component (109) can therefore be used to draw conclusions about the current position or position of the latching mechanism (101) or of the first latching element (103) relative to the second latching element (203).
- the limit value detection device (100) can be a capacitor or a resistor or a coil or an electro-optical element. All of these electrical components are suitable for detecting even the slightest changes in their electrical behavior.
- the electrical component (109) can be an adjustable member of an RFID resonant circuit (207).
- the electrical component (109) could therefore be, for example, an electrical consumer with variable resistance, a capacitor with variable capacity or a coil with variable inductance, with their respective electrical properties varying depending on the quantity to be determined (e.g. temperature, pressure, etc.). .
- the resonance frequency of the entire RFID resonant circuit (207) also changes.
- the (active or passive) RFID resonant circuit (207) can be read, for example, with an RFID reader, the frequency of the resonant circuit being an indicator for the current value of the respective adjustable electrical component (109), and thus at the same time also an indicator for can be the current position of the locking mechanism (101).
- the limit value detection device (100) can further have a substrate (210) on which the latching mechanism (101) is arranged, and the electrical component (109) can be between the latching mechanism (101) and the substrate (210).
- the electrical component (109) can be structured, for example, as a corresponding component structure (capacitor, transistor, diode, resistor, etc.) in a semiconductor substrate 210.
- the limit value detection device (100) can further have a substrate (210) on which the latching mechanism (101) is provided, and the electrical component (109) can be a capacitor, wherein a first capacitor plate (201) is provided on the substrate (210) and a second capacitor plate (202) on the latching mechanism (101) and / or on the pawl (104), and wherein
- the latching mechanism (101) and/or the pawl (104) moves in a detent manner relative to the substrate (210)
- the orientation of the capacitor plates (201, 202) changes relative to one another, so that the capacitor capacity changes.
- the limit value detection device (100) can be used as a
- Sterilization cycle counter can be designed, in which the actuating means (108) moves the locking mechanism (101) by exactly one detent (102a, 102b) after a sterilization process has been carried out.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Transmission Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022208428.4A DE102022208428A1 (de) | 2022-08-12 | 2022-08-12 | Grenzwertdetektionsvorrichtung mit zähleinheit |
| PCT/EP2023/071206 WO2024033142A1 (de) | 2022-08-12 | 2023-07-31 | Grenzwertdetektionsvorrichtung mit zähleinheit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4569438A1 true EP4569438A1 (de) | 2025-06-18 |
Family
ID=87567412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23751882.4A Pending EP4569438A1 (de) | 2022-08-12 | 2023-07-31 | Grenzwertdetektionsvorrichtung mit zähleinheit |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20250156673A1 (de) |
| EP (1) | EP4569438A1 (de) |
| CN (1) | CN120035830A (de) |
| DE (1) | DE102022208428A1 (de) |
| WO (1) | WO2024033142A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4225792C2 (de) * | 1992-07-31 | 1994-06-01 | Ethicon Gmbh | Anzeigevorrichtung für die Anzahl durchgeführter Erwärmungen |
| DE19721964A1 (de) * | 1997-05-26 | 1998-12-03 | Bartels Mikrotechnik Gmbh | Zählvorrichtung für Temperaturzyklen |
| BR0209884A (pt) * | 2001-05-21 | 2004-06-08 | Landis & Gyr Ag | Contador unidirecional |
| DE102005039333A1 (de) * | 2005-08-19 | 2007-02-22 | Gebr. Brasseler Gmbh & Co. Kg | Sterilisationszykluszählvorrichtung und Temperaturwechselanzeigevorrichtung |
| GB201421983D0 (en) * | 2014-12-10 | 2015-01-21 | Coalesce Product Dev Ltd | Improvements in counting devices |
| DE102016220111B3 (de) * | 2016-10-14 | 2018-02-01 | Hahn-Schickard-Gesellschaft für angewandte Forschung e.V. | Grenzwertdetektionsvorrichtung |
-
2022
- 2022-08-12 DE DE102022208428.4A patent/DE102022208428A1/de active Pending
-
2023
- 2023-07-31 CN CN202380072515.XA patent/CN120035830A/zh active Pending
- 2023-07-31 WO PCT/EP2023/071206 patent/WO2024033142A1/de not_active Ceased
- 2023-07-31 EP EP23751882.4A patent/EP4569438A1/de active Pending
-
2025
- 2025-01-17 US US19/026,583 patent/US20250156673A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024033142A1 (de) | 2024-02-15 |
| US20250156673A1 (en) | 2025-05-15 |
| DE102022208428A1 (de) | 2024-02-15 |
| CN120035830A (zh) | 2025-05-23 |
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