DE102009041450A1 - Temperature measuring system, has bus line evaluated by master, and clients coupled along bus line, where system is detachably connected with clients by branch line and temperature measuring point is connected with clients - Google Patents

Abstract

The system has a bus line evaluated by a master, and clients coupled along the bus line, where the system is detachably connected with the clients by a branch line (2). A temperature measuring point is connected with the clients by the branch line. Another temperature measuring point arranged parallel to the former temperature measuring point is attached in an area of the clients. The branch line is designed as a connection to a temperature sensor by a mineral-insulated cable, PTFE insulation or fiber glass braid.

Description

Actuator sends the beeps, or have a direction finder, which is controlled by the handset, dispose. In addition to the signal lamp, these latter means can also be activated manually via the bus line, or activated automatically when certain operating states are reached via the client or the master.

A housing may consist of a lower part ( 11 ) and a top ( 12 ), which is designed for example in plastic and locking together enclosing a ribbon cable. An opening ( 13 ) allows the lead out of the stub. Not shown but are conceivable means for strain relief in cooperation with the housing. Such a housing can be closed by latching, but also be joined by gluing and sealed by means of elastic seal sealing against the environment. Furthermore, other designs in stainless steel or other materials are conceivable.

4 shows a version "Plug &Play" with preconfigured connection lines already with two-sided plug connections ( 20 ), and the clients as intermediate connectors ( 21 ) are executed.

The plugs are secured to each other by means of special locking elements, and can be used in addition to 4 bus contacts ( 22 ) at least one contact ( 23 ), which is used to monitor the proper plug connection. Sinvollweise, such contacts are trailing to the signal contacts.

Within the service, the contact resistances of the plug connection can be monitored and, when limits are reached, alarm messages can be sent to the control room or to the surroundings (optically, acoustically).

It is also conceivable that the temperature sensor ( 9 ) together with stub line ( 2 ) by means of a plug ( 24 ) to the client ( 21 ) connectable, is connected interchangeably.

A connection of the master to the control room is also conceivable via plug-in connections with the above-mentioned functionalities.

5 shows a further embodiment with 4-pin ribbon cable, wherein for contacting the cable crimp contacts ( 31 ) with, for example piercing contacts ( 32 ) penetrate the insulation of the cable and contact the conductor. The contacts also have another contact point ( 40 ) for contacting the client electronics ( 5 ). This contact point can be embodied, for example, in the form of a pin, which is replaced by a recess (FIG. 35 ) of the printed circuit board in a contact block ( 36 ) can intervene. Such contacts are automatically, semi-automatically or by hand pliers introduced into the line. In addition, holes ( 33 ) are punched into the flat cable to which the client can fix by positive locking. For this purpose, molded parts of the housing, for example in the form of columns ( 38 ) in the cable, or columns 39 simultaneously flat cable ( 1 ) and electronics ( 5 ) to fix each other, although the electronics with corresponding Aussparungen (concealed, not shown) is executed. The contact is relieved at a mechanical stress of the client relative to the cable.

The invention is not limited to the preceding detailed embodiments. It may be modified within the scope of the following claims. Furthermore, other similar designs are conceivable, which are not mentioned here.

Claims (21)

Temperature measuring system consisting of a bus line, which is evaluated by a master, wherein along the bus line multiple clients can be coupled, characterized in that the temperature measuring points can be connected via a stub detachably connected to the clients. Temperature detection system according to claim 1, wherein with a client a first temperature measuring point is coupled via a spur line and parallel to a second temperature measuring point in the region of the client is mounted and this second measured value is transmitted in parallel to the first measured value via the bus line to a master. Temperature detection system according to claim 1, wherein the stub is designed as a connection to the first temperature sensor high temperature resistant. Temperature detection system according to claim 1, wherein the stub is designed as a connection to the first temperature sensor by means of mineral-insulated line, PTFE insulation or by means of glass fiber braid high temperature resistant. Temperature detection system according to claim 1, wherein one or more clients amplifies the analog temperature reading, digitally converted and transmitted by means of digital transmission over a line to a master, a control center. Temperature sensing system according to claim 1, wherein the client as a module, the string line continuously receives in a housing, this contacted and fixed. Temperature detection system according to claim 1, wherein the temperature measuring point including stub line is releasably connectable by means of plug connection or terminal block with the client. Temperature detection system according to one of the preceding claims, wherein the temperature measuring point thermocouple or resistance sensor, a Pt100 or NTC and / or a stainless steel encapsulation comprises. Temperature detection system according to one of the preceding claims, wherein the client includes means for acoustic or optical communication, which are manually accessible, or are activated when certain limits are reached. A temperature sensing system according to any one of the preceding claims, wherein the client includes optical signaling means which output the traffic or portions of the traffic within the bus system or the client. Temperature detection system according to one of the preceding claims, wherein the client includes radio means by which the client can be located by Beilung or communicates with a handset. Temperature detection system according to one of the preceding claims, wherein the client can be coupled by means of at least two locally mounted on the client electrical connector in the bus line, wherein the bus line is interrupted and passed through the client. Temperature detection system according to one of the preceding claims, wherein the housing is designed in two parts. Temperature detection system according to one of the preceding claims, wherein the housing is made in one piece, in which the two Gehaüseteile are connected by means of a molded Filmschaniers or a tab. Temperature detection system according to one of the preceding claims, wherein the housing includes means which positively engage through the cable, and mechanically fix housing or client electronics to the cable. Temperature detection system according to one of the preceding claims, wherein the client is electrically connected by means of cutting contacts with the cable, which penetrate the insulation of the cable in a first step, and in a second step contact the conductor. Temperature sensing system according to one of the preceding claims, wherein the client electronic board is equipped with a contact block with at least 2 spring-loaded contacts, which are engageable with applied to the cable cutting contacts. Temperature sensing system according to claim 1, 12 or any one of the preceding claims, wherein the contacting of the client to the bus is monitored. Temperature sensing system according to claim 1, 12 or any one of the preceding claims, wherein the contacting of the client to the bus is monitored by resistance measurement or lagging contacts. Temperature detection system according to claim 1, 12 or one of the preceding claims, wherein the contact of the client is monitored to the bus, and when detected contact weak points this is signaled to the master and at least in parts switched to a spare spare line as a replacement. Temperature detection system according to one of the preceding claims, wherein the bus protocol according to the standard RS 485 is operated.

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