1. A sensor for determining at least one parameter with a sigma-delta-converter comprising
Switched capacitors comprising at least two input capacitors and at least one feedback capacitor, wherein at least two of the capacitors is a measuring capacitors designed so that their respective capacity depends on the parameter to be determined; and
two oppositely switched amplifier channels wherein one of said measuring capacitors is arranged in each amplifier channel.
2. The sensor of claim 1 wherein the measuring capacitors are input capacitors.
3. The sensor of claim 1 wherein the measuring capacitor comprises a dielectric the dielectric constant of which depends on a parameter to be measured, and wherein the measuring capacitor comprises interdigital electrodes on top of which the dielectric is arranged.
4. The sensor of claim 1 wherein the two measuring capacitors are of substantially equal design and are arranged symmetrically in the measuring channels.
5. The sensor of claim 1 wherein the sigma delta converter comprises at least one amplifier stage with an input and a first and a second group of input capacitors, which can be selectively connected to the input by means of switches so that measurements can be carried out with the first as well as the second group.
6. The sensor of claim 5 wherein at least one capacitor of the first group is connected to an analog measurement input and the measuring capacitor is part of the second group, and the sensor comprises a temperature measuring unit connected to the analog measuring input.
7. A sensor for determining at least one parameter with a sigma-delta-converter comprising
Switched capacitors comprising at least two input capacitors and at least one feedback capacitor, wherein at least two of the capacitors are measuring capacitors designed so that their respective capacity depends on the parameter to be determined; and
two oppositely switched amplifier channels wherein one of said measuring capacitors is arranged in each amplifier channel
wherein at least one of the input capacitors is a compensation capacitor and the compensation capacitor can be connected to a compensation potential via a compensation switch and the measuring capacitor to a sensor potential via a sensor switch, wherein the compensation switch is switched substantially in opposite manner to the sensor switch.
8. The sensor of claim 7 wherein the compensation capacitor and the measuring capacitor have substantially the same capacitance, are arranged on a common substrate, and comprise interdigital electrodes.
9. A sensor for determining at least one parameter with a sigma-delta-converter comprising
Switched capacitors comprising at least two input capacitors and at least one feedback capacitor, wherein at least two of the capacitors are measuring capacitors designed so that their respective capacity depends on the parameter to be determined; and
two oppositely switched amplifier channels wherein one of said measuring capacitors is arranged in each amplifier channel
wherein at least one of the measuring capacitors consists of at least two parallel sub-capacitors at least one of which can selectively be added by means of control unit.
10. The sensor of claim 9 wherein the measuring capacitor comprises interdigital electrodes, wherein a first part of the interdigital electrodes is attributed to the first sub-capacitor and a second part of the interdigital electrodes to the second sub-capacitor, and the attribution of the interdigital electrodes is symmetric to a central line of the measuring capacitor running parallel to the interdigital electrodes.
11. The sensor of claim 10 wherein the measuring capacitor comprises more than two sub-capacitors, wherein the number of interdigital electrodes attributed to the i-th sub-capacitor is proportional to 21.
12. A sensor for determining at least one parameter with a sigma-delta converter, said sigma-delta converter comprising
switched capacitors comprising at least two input capacitors and at last one feedback capacitor;
two oppositely switched amplifier channels; and
at least two measurement capacitors arranged as two of said switched capacitors in each of said amplifier channels, wherein the capacity of each measurement capacitor depends on the parameter to be determined.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A switch module of a power socket, comprising:
a press button;
a power supply module, for being switched to a power connection status or a power disconnection status by the press button;
a first power conductive plate;
a second power conductive plate;
a casing, formed by a plastic injection molding or die casting process, and having an opening formed at the top of the casing, a containing space disposed at a corresponding position inside the opening for containing the power supply module and the press button sequentially, a recession formed on two corresponding external sides of the casing separately, and the two recessions being transversally disposed for containing the first power conductive plate and the second power conductive plate respectively, and the first power conductive plate and the second power conductive plate being riveted onto the casing through corresponding riveting holes of the casing respectively, and the second power conductive plate being connected directly or indirectly to an end of an electrically conductive portion of the power supply module for transmitting an electric current to the electrically conductive portion, and two positioning portions being protruded from an external periphery of the recession which is used for containing the first power conductive plate;
a first conductive clamping plate, contained in one of the positioning portions, and riveted onto the first power conductive plate for fixing the first conductive clamping plate onto the casing, and having a power polarity of the first power conductive plate;
an isolated portion, with a side contained into the other positioning portion, and a side of the isolated portion being capable of covering the first power conductive plate completely; and
a second conductive clamping plate, contained in the other positioning portion and abutted against a side of the isolated portion, and having an inverted hook installed at an end of a conductive extension plate and the end of the conductive extension plate being passed through two corresponding sides of the casing and fixed onto the casing, and the second conductive clamping plate being coupled to another electrically conductive portion of the power supply module, such that when the power supply module is switched to a connection status by the press button, the second conductive clamping plate has a power polarity of the second power conductive plate, or when the power supply module is switched to a disconnection status by the press button, the second conductive clamping plate has no power polarity.
2. The switch module of claim 1, further comprising a connecting portion, with an end riveted onto the second power conductive plate, and having an inverted hook formed at a position proximate to the other end of the connecting portion, and the connecting portion being fixed onto the casing by the inverted hook when the other end of the connecting portion passes through two corresponding external sides of the casing.
3. The switch module of claim 2, wherein the first conductive clamping plate further includes two clamping plates for clamping a protruded pillar installed on an internal side of the casing.
4. The switch module of claim 3, wherein the isolated portion further includes at least one protrusion disposed on a side of the isolated portion, and embedded into a gap between the first power conductive plate and the casing for increasing a creepage distance.
5. The switch module of claim 4, wherein the isolated portion includes two corresponding stop plates disposed on the other side of the isolated portion, and the second conductive clamping plate is contained between the two stop plates.
6. The switch module of claim 5, wherein the first conductive clamping plate includes another conductive extension plate disposed thereon, and an end of an indicating lamp of the power supply module is connected to the another conductive extension plate, and the other end of the indicating lamp is connected to the electrically conductive portion.
7. The switch module of claim 6, wherein the casing includes at least one stop block disposed proximate to two corresponding internal sides of the opening separately, and each stop block is capable of stopping both ends of the press button, such that both ends of the press button cannot be displaced excessively in the containing space.